Merge branch 'google:master' into master

.github/ISSUE_TEMPLATE/11-tasks-issue.md

@@ -0,0 +1,25 @@
+---
+name: "Tasks Issue"
+about: Use this template for assistance with using MediaPipe Tasks (developers.google.com/mediapipe/solutions) to deploy on-device ML solutions (e.g. gesture recognition etc.) on supported platforms.
+labels: type:support
+
+---
+<em>Please make sure that this is a [Tasks](https://developers.google.com/mediapipe/solutions) issue.<em>
+
+**System information** (Please provide as much relevant information as possible)
+- Have I written custom code (as opposed to using a stock example script provided in MediaPipe):
+- OS Platform and Distribution (e.g., Linux Ubuntu 16.04, Android 11, iOS 14.4):
+- MediaPipe Tasks SDK version:
+- Task name (e.g. Object detection, Gesture recognition etc.):
+- Programming Language and version ( e.g. C++, Python, Java):
+
+**Describe the expected behavior:**
+
+**Standalone code you may have used to try to get what you need :**
+
+If there is a problem, provide a reproducible test case that is the bare minimum necessary to generate the problem. If possible, please share a link to Colab, GitHub repo link or anything that we can use to reproduce the problem:
+
+**Other info / Complete Logs :**
+Include any logs or source code that would be helpful to
+diagnose the problem. If including tracebacks, please include the full
+traceback. Large logs and files should be attached:

.github/ISSUE_TEMPLATE/12-model-maker-issue.md

@@ -0,0 +1,25 @@
+---
+name: "Model Maker Issue"
+about: Use this template for assistance with using MediaPipe Model Maker (developers.google.com/mediapipe/solutions) to create custom on-device ML solutions.
+labels: type:support
+
+---
+<em>Please make sure that this is a [Model Maker](https://developers.google.com/mediapipe/solutions) issue.<em>
+
+**System information** (Please provide as much relevant information as possible)
+- Have I written custom code (as opposed to using a stock example script provided in MediaPipe):
+- OS Platform and Distribution (e.g., Linux Ubuntu 16.04):
+- Python version (e.g. 3.8):
+- [MediaPipe Model Maker version](https://pypi.org/project/mediapipe-model-maker/):
+- Task name (e.g. Image classification, Gesture recognition etc.):
+
+**Describe the expected behavior:**
+
+**Standalone code you may have used to try to get what you need :**
+
+If there is a problem, provide a reproducible test case that is the bare minimum necessary to generate the problem. If possible, please share a link to Colab, GitHub repo link or anything that we can use to reproduce the problem:
+
+**Other info / Complete Logs :**
+Include any logs or source code that would be helpful to
+diagnose the problem. If including tracebacks, please include the full
+traceback. Large logs and files should be attached:

.github/ISSUE_TEMPLATE/13-solution-issue.md

@@ -1,6 +1,6 @@
 ---
-name: "Solution Issue"
+name: "Solution (legacy) Issue"
-about: Use this template for assistance with a specific mediapipe solution, such as "Pose" or "Iris", including inference model usage/training, solution-specific calculators, etc.
+about: Use this template for assistance with a specific Mediapipe solution (google.github.io/mediapipe/solutions) such as "Pose", including inference model usage/training, solution-specific calculators etc.
 labels: type:support
 
 ---

.github/ISSUE_TEMPLATE/14-studio-issue.md

@@ -0,0 +1,19 @@
+---
+name: "Studio Issue"
+about: Use this template for assistance with the MediaPipe Studio application.
+labels: type:support
+
+---
+<em>Please make sure that this is a MediaPipe Studio issue.<em>
+
+**System information** (Please provide as much relevant information as possible)
+- OS Platform and Distribution (e.g., Linux Ubuntu 16.04, Android 11, iOS 14.4):
+- Browser and Version
+- Any microphone or camera hardware
+- URL that shows the problem
+
+**Describe the expected behavior:**
+
+**Other info / Complete Logs :**
+Include any js console logs that would be helpful to diagnose the problem.
+Large logs and files should be attached:

.github/bot_config.yml

@@ -15,4 +15,5 @@
 
 # A list of assignees
 assignees:
-   - sureshdagooglecom
+   - kuaashish
+   - ayushgdev

WORKSPACE

@@ -22,21 +22,20 @@ bazel_skylib_workspace()
 load("@bazel_skylib//lib:versions.bzl", "versions")
 versions.check(minimum_bazel_version = "3.7.2")
 
-# ABSL cpp library lts_2021_03_24, patch 2.
+# ABSL cpp library lts_2023_01_25.
 http_archive(
     name = "com_google_absl",
     urls = [
-        "https://github.com/abseil/abseil-cpp/archive/refs/tags/20210324.2.tar.gz",
+        "https://github.com/abseil/abseil-cpp/archive/refs/tags/20230125.0.tar.gz",
     ],
-    # Remove after https://github.com/abseil/abseil-cpp/issues/326 is solved.
     patches = [
-        "@//third_party:com_google_absl_f863b622fe13612433fdf43f76547d5edda0c93001.diff"
+        "@//third_party:com_google_absl_windows_patch.diff"
     ],
     patch_args = [
         "-p1",
     ],
-    strip_prefix = "abseil-cpp-20210324.2",
+    strip_prefix = "abseil-cpp-20230125.0",
-    sha256 = "59b862f50e710277f8ede96f083a5bb8d7c9595376146838b9580be90374ee1f"
+    sha256 = "3ea49a7d97421b88a8c48a0de16c16048e17725c7ec0f1d3ea2683a2a75adc21"
 )
 
 http_archive(
@@ -212,14 +211,14 @@ http_archive(
     sha256 = "75922da3a1bdb417d820398eb03d4e9bd067c4905a4246d35a44c01d62154d91",
 )
 
-# Point to the commit that deprecates the usage of Eigen::MappedSparseMatrix.
+# 2022-10-20
 http_archive(
     name = "pybind11",
     urls = [
-        "https://github.com/pybind/pybind11/archive/70a58c577eaf067748c2ec31bfd0b0a614cffba6.zip",
+        "https://github.com/pybind/pybind11/archive/v2.10.1.zip",
     ],
-    sha256 = "b971842fab1b5b8f3815a2302331782b7d137fef0e06502422bc4bc360f4956c",
+    sha256 = "fcf94065efcfd0a7a828bacf118fa11c43f6390d0c805e3e6342ac119f2e9976",
-    strip_prefix = "pybind11-70a58c577eaf067748c2ec31bfd0b0a614cffba6",
+    strip_prefix = "pybind11-2.10.1",
     build_file = "@pybind11_bazel//:pybind11.BUILD",
 )
 
@@ -320,12 +319,30 @@ http_archive(
     ],
 )
 
-# iOS basic build deps.
+# Load Zlib before initializing TensorFlow and the iOS build rules to guarantee
+# that the target @zlib//:mini_zlib is available
+http_archive(
+    name = "zlib",
+    build_file = "//third_party:zlib.BUILD",
+    sha256 = "c3e5e9fdd5004dcb542feda5ee4f0ff0744628baf8ed2dd5d66f8ca1197cb1a1",
+    strip_prefix = "zlib-1.2.11",
+    urls = [
+        "http://mirror.bazel.build/zlib.net/fossils/zlib-1.2.11.tar.gz",
+        "http://zlib.net/fossils/zlib-1.2.11.tar.gz",  # 2017-01-15
+    ],
+    patches = [
+        "@//third_party:zlib.diff",
+    ],
+    patch_args = [
+        "-p1",
+    ],
+)
 
+# iOS basic build deps.
 http_archive(
     name = "build_bazel_rules_apple",
-    sha256 = "77e8bf6fda706f420a55874ae6ee4df0c9d95da6c7838228b26910fc82eea5a2",
+    sha256 = "f94e6dddf74739ef5cb30f000e13a2a613f6ebfa5e63588305a71fce8a8a9911",
-    url = "https://github.com/bazelbuild/rules_apple/releases/download/0.32.0/rules_apple.0.32.0.tar.gz",
+    url = "https://github.com/bazelbuild/rules_apple/releases/download/1.1.3/rules_apple.1.1.3.tar.gz",
     patches = [
         # Bypass checking ios unit test runner when building MP ios applications.
         "@//third_party:build_bazel_rules_apple_bypass_test_runner_check.diff"
@@ -339,29 +356,24 @@ load(
     "@build_bazel_rules_apple//apple:repositories.bzl",
     "apple_rules_dependencies",
 )
-
 apple_rules_dependencies()
 
 load(
     "@build_bazel_rules_swift//swift:repositories.bzl",
     "swift_rules_dependencies",
 )
-
 swift_rules_dependencies()
 
-http_archive(
+load(
-    name = "build_bazel_apple_support",
+    "@build_bazel_rules_swift//swift:extras.bzl",
-    sha256 = "741366f79d900c11e11d8efd6cc6c66a31bfb2451178b58e0b5edc6f1db17b35",
+    "swift_rules_extra_dependencies",
-    urls = [
-        "https://github.com/bazelbuild/apple_support/releases/download/0.10.0/apple_support.0.10.0.tar.gz"
-    ],
 )
+swift_rules_extra_dependencies()
 
 load(
     "@build_bazel_apple_support//lib:repositories.bzl",
     "apple_support_dependencies",
 )
-
 apple_support_dependencies()
 
 # More iOS deps.
@@ -442,25 +454,6 @@ http_archive(
     ],
 )
 
-# Load Zlib before initializing TensorFlow to guarantee that the target
-# @zlib//:mini_zlib is available
-http_archive(
-    name = "zlib",
-    build_file = "//third_party:zlib.BUILD",
-    sha256 = "c3e5e9fdd5004dcb542feda5ee4f0ff0744628baf8ed2dd5d66f8ca1197cb1a1",
-    strip_prefix = "zlib-1.2.11",
-    urls = [
-        "http://mirror.bazel.build/zlib.net/fossils/zlib-1.2.11.tar.gz",
-        "http://zlib.net/fossils/zlib-1.2.11.tar.gz",  # 2017-01-15
-    ],
-    patches = [
-        "@//third_party:zlib.diff",
-    ],
-    patch_args = [
-        "-p1",
-    ],
-)
-
 # TensorFlow repo should always go after the other external dependencies.
 # TF on 2022-08-10.
 _TENSORFLOW_GIT_COMMIT = "af1d5bc4fbb66d9e6cc1cf89503014a99233583b"

docs/BUILD

@@ -4,12 +4,10 @@ py_binary(
     name = "build_py_api_docs",
     srcs = ["build_py_api_docs.py"],
     deps = [
-        "//mediapipe",
         "//third_party/py/absl:app",
         "//third_party/py/absl/flags",
-        "//third_party/py/tensorflow_docs",
+        "//third_party/py/mediapipe",
         "//third_party/py/tensorflow_docs/api_generator:generate_lib",
-        "//third_party/py/tensorflow_docs/api_generator:public_api",
     ],
 )
 
@@ -17,6 +15,7 @@ py_binary(
     name = "build_java_api_docs",
     srcs = ["build_java_api_docs.py"],
     data = [
+        "//third_party/android/sdk:api/26.txt",
         "//third_party/java/doclava/current:doclava.jar",
         "//third_party/java/jsilver:jsilver_jar",
     ],

docs/build_java_api_docs.py

@@ -20,10 +20,6 @@ from absl import flags
 
 from tensorflow_docs.api_generator import gen_java
 
-_JAVA_ROOT = flags.DEFINE_string('java_src', None,
-                                 'Override the Java source path.',
-                                 required=False)
-
 _OUT_DIR = flags.DEFINE_string('output_dir', '/tmp/mp_java/',
                                'Write docs here.')
 
@@ -37,27 +33,30 @@ _ = flags.DEFINE_bool(
     'search_hints', True,
     '[UNUSED] Include metadata search hints in the generated files')
 
+_ANDROID_SDK = pathlib.Path('android/sdk/api/26.txt')
+
 
 def main(_) -> None:
-  if not (java_root := _JAVA_ROOT.value):
+  # Default to using a relative path to find the Java source.
-    # Default to using a relative path to find the Java source.
+  mp_root = pathlib.Path(__file__)
-    mp_root = pathlib.Path(__file__)
+  while (mp_root := mp_root.parent).name != 'mediapipe':
-    while (mp_root := mp_root.parent).name != 'mediapipe':
+    # Find the nearest `mediapipe` dir.
-      # Find the nearest `mediapipe` dir.
+    pass
-      pass
 
-    # Externally, parts of the repo are nested inside a mediapipe/ directory
+  # Find the root from which all packages are relative.
-    # that does not exist internally. Support both.
+  root = mp_root.parent
-    if (mp_root / 'mediapipe').exists():
-      mp_root = mp_root / 'mediapipe'
 
-    java_root = mp_root / 'tasks/java'
+  # Externally, parts of the repo are nested inside a mediapipe/ directory
+  # that does not exist internally. Support both.
+  if (mp_root / 'mediapipe').exists():
+    mp_root = mp_root / 'mediapipe'
 
   gen_java.gen_java_docs(
       package='com.google.mediapipe',
-      source_path=pathlib.Path(java_root),
+      source_path=mp_root / 'tasks/java',
       output_dir=pathlib.Path(_OUT_DIR.value),
-      site_path=pathlib.Path(_SITE_PATH.value))
+      site_path=pathlib.Path(_SITE_PATH.value),
+      federated_docs={'https://developer.android.com': root / _ANDROID_SDK})
 
 
 if __name__ == '__main__':

docs/build_model_maker_api_docs.py

@@ -0,0 +1,81 @@
+# Copyright 2022 The MediaPipe Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# ==============================================================================
+r"""MediaPipe Model Maker reference docs generation script.
+
+This script generates API reference docs for the `mediapipe` PIP package.
+
+$> pip install -U git+https://github.com/tensorflow/docs mediapipe-model-maker
+$> python build_model_maker_api_docs.py
+"""
+
+import os
+
+from absl import app
+from absl import flags
+
+from tensorflow_docs.api_generator import generate_lib
+
+try:
+  # mediapipe has not been set up to work with bazel yet, so catch & report.
+  import mediapipe_model_maker  # pytype: disable=import-error
+except ImportError as e:
+  raise ImportError('Please `pip install mediapipe-model-maker`.') from e
+
+
+PROJECT_SHORT_NAME = 'mediapipe_model_maker'
+PROJECT_FULL_NAME = 'MediaPipe Model Maker'
+
+_OUTPUT_DIR = flags.DEFINE_string(
+    'output_dir',
+    default='/tmp/generated_docs',
+    help='Where to write the resulting docs.')
+
+_URL_PREFIX = flags.DEFINE_string(
+    'code_url_prefix',
+    'https://github.com/google/mediapipe/tree/master/mediapipe/model_maker',
+    'The url prefix for links to code.')
+
+_SEARCH_HINTS = flags.DEFINE_bool(
+    'search_hints', True,
+    'Include metadata search hints in the generated files')
+
+_SITE_PATH = flags.DEFINE_string('site_path', '/mediapipe/api_docs/python',
+                                 'Path prefix in the _toc.yaml')
+
+
+def gen_api_docs():
+  """Generates API docs for the mediapipe-model-maker package."""
+
+  doc_generator = generate_lib.DocGenerator(
+      root_title=PROJECT_FULL_NAME,
+      py_modules=[(PROJECT_SHORT_NAME, mediapipe_model_maker)],
+      base_dir=os.path.dirname(mediapipe_model_maker.__file__),
+      code_url_prefix=_URL_PREFIX.value,
+      search_hints=_SEARCH_HINTS.value,
+      site_path=_SITE_PATH.value,
+      callbacks=[],
+  )
+
+  doc_generator.build(_OUTPUT_DIR.value)
+
+  print('Docs output to:', _OUTPUT_DIR.value)
+
+
+def main(_):
+  gen_api_docs()
+
+
+if __name__ == '__main__':
+  app.run(main)

docs/build_py_api_docs.py

@@ -26,11 +26,10 @@ from absl import app
 from absl import flags
 
 from tensorflow_docs.api_generator import generate_lib
-from tensorflow_docs.api_generator import public_api
 
 try:
   # mediapipe has not been set up to work with bazel yet, so catch & report.
-  import mediapipe  # pytype: disable=import-error
+  import mediapipe as mp  # pytype: disable=import-error
 except ImportError as e:
   raise ImportError('Please `pip install mediapipe`.') from e
 
@@ -45,31 +44,30 @@ _OUTPUT_DIR = flags.DEFINE_string(
 
 _URL_PREFIX = flags.DEFINE_string(
     'code_url_prefix',
-    'https://github.com/google/mediapipe/tree/master/mediapipe',
+    'https://github.com/google/mediapipe/blob/master/mediapipe',
     'The url prefix for links to code.')
 
 _SEARCH_HINTS = flags.DEFINE_bool(
     'search_hints', True,
     'Include metadata search hints in the generated files')
 
-_SITE_PATH = flags.DEFINE_string('site_path', '/mediapipe/api_docs/python',
+_SITE_PATH = flags.DEFINE_string('site_path', '/mediapipe/api/solutions/python',
                                  'Path prefix in the _toc.yaml')
 
 
 def gen_api_docs():
   """Generates API docs for the mediapipe package."""
+  if hasattr(mp, 'solutions'):
+    del mp.solutions
 
   doc_generator = generate_lib.DocGenerator(
       root_title=PROJECT_FULL_NAME,
-      py_modules=[(PROJECT_SHORT_NAME, mediapipe)],
+      py_modules=[(PROJECT_SHORT_NAME, mp)],
-      base_dir=os.path.dirname(mediapipe.__file__),
+      base_dir=os.path.dirname(mp.__file__),
       code_url_prefix=_URL_PREFIX.value,
       search_hints=_SEARCH_HINTS.value,
       site_path=_SITE_PATH.value,
-      # This callback ensures that docs are only generated for objects that
+      callbacks=[],
-      # are explicitly imported in your __init__.py files. There are other
-      # options but this is a good starting point.
-      callbacks=[public_api.explicit_package_contents_filter],
   )
 
   doc_generator.build(_OUTPUT_DIR.value)

docs/getting_started/install.md

@@ -35,7 +35,7 @@ install --user six`.
 
     ```bash
     $ cd $HOME
-    $ git clone https://github.com/google/mediapipe.git
+    $ git clone -–depth 1 https://github.com/google/mediapipe.git
 
     # Change directory into MediaPipe root directory
     $ cd mediapipe
@@ -287,7 +287,7 @@ build issues.
 2.  Checkout MediaPipe repository.
 
     ```bash
-    $ git clone https://github.com/google/mediapipe.git
+    $ git clone -–depth 1 https://github.com/google/mediapipe.git
 
     # Change directory into MediaPipe root directory
     $ cd mediapipe
@@ -416,7 +416,7 @@ build issues.
 3.  Checkout MediaPipe repository.
 
     ```bash
-    $ git clone https://github.com/google/mediapipe.git
+    $ git clone -–depth 1 https://github.com/google/mediapipe.git
 
     $ cd mediapipe
     ```
@@ -590,7 +590,7 @@ next section.
 7.  Checkout MediaPipe repository.
 
     ```
-    C:\Users\Username\mediapipe_repo> git clone https://github.com/google/mediapipe.git
+    C:\Users\Username\mediapipe_repo> git clone -–depth 1 https://github.com/google/mediapipe.git
 
     # Change directory into MediaPipe root directory
     C:\Users\Username\mediapipe_repo> cd mediapipe
@@ -680,7 +680,7 @@ cameras. Alternatively, you use a video file as input.
 6.  Checkout MediaPipe repository.
 
     ```bash
-    username@DESKTOP-TMVLBJ1:~$ git clone https://github.com/google/mediapipe.git
+    username@DESKTOP-TMVLBJ1:~$ git clone -–depth 1 https://github.com/google/mediapipe.git
 
     username@DESKTOP-TMVLBJ1:~$ cd mediapipe
     ```
@@ -771,7 +771,7 @@ This will use a Docker image that will isolate mediapipe's installation from the
 2.  Build a docker image with tag "mediapipe".
 
     ```bash
-    $ git clone https://github.com/google/mediapipe.git
+    $ git clone -–depth 1 https://github.com/google/mediapipe.git
     $ cd mediapipe
     $ docker build --tag=mediapipe .
 

docs/solutions/holistic.md

@@ -259,6 +259,7 @@ mp_holistic = mp.solutions.holistic
 
 # For static images:
 IMAGE_FILES = []
+BG_COLOR = (192, 192, 192) # gray
 with mp_holistic.Holistic(
     static_image_mode=True,
     model_complexity=2,

docs/solutions/models.md

@@ -94,8 +94,6 @@ one over the other.
 
 *   [TFLite model](https://storage.googleapis.com/mediapipe-assets/ssdlite_object_detection.tflite)
 *   [TFLite model quantized for EdgeTPU/Coral](https://github.com/google/mediapipe/tree/master/mediapipe/examples/coral/models/object-detector-quantized_edgetpu.tflite)
-*   [TensorFlow model](https://github.com/google/mediapipe/tree/master/mediapipe/models/object_detection_saved_model)
-*   [Model information](https://github.com/google/mediapipe/tree/master/mediapipe/models/object_detection_saved_model/README.md)
 
 ### [Objectron](https://google.github.io/mediapipe/solutions/objectron)
 

mediapipe/calculators/audio/BUILD

@@ -12,12 +12,12 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+load("//mediapipe/framework/port:build_config.bzl", "mediapipe_cc_proto_library")
+
 licenses(["notice"])
 
 package(default_visibility = ["//visibility:private"])
 
-load("//mediapipe/framework/port:build_config.bzl", "mediapipe_cc_proto_library")
-
 proto_library(
     name = "mfcc_mel_calculators_proto",
     srcs = ["mfcc_mel_calculators.proto"],
@@ -197,7 +197,6 @@ cc_library(
         ":spectrogram_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/formats:matrix",
-        "//mediapipe/framework/formats:time_series_header_cc_proto",
         "//mediapipe/framework/port:core_proto",
         "//mediapipe/framework/port:integral_types",
         "//mediapipe/framework/port:logging",

mediapipe/calculators/audio/spectrogram_calculator.cc

@@ -280,6 +280,13 @@ absl::Status SpectrogramCalculator::Open(CalculatorContext* cc) {
       audio_dsp::HammingWindow().GetPeriodicSamples(frame_duration_samples_,
                                                     &window);
       break;
+    case SpectrogramCalculatorOptions::SQRT_HANN: {
+      audio_dsp::HannWindow().GetPeriodicSamples(frame_duration_samples_,
+                                                 &window);
+      absl::c_transform(window, window.begin(),
+                        [](double x) { return std::sqrt(x); });
+      break;
+    }
   }
 
   // Propagate settings down to the actual Spectrogram object.

mediapipe/calculators/audio/spectrogram_calculator.proto

@@ -68,6 +68,7 @@ message SpectrogramCalculatorOptions {
     HANN = 0;
     HAMMING = 1;
     COSINE = 2;
+    SQRT_HANN = 4;
   }
   optional WindowType window_type = 6 [default = HANN];
 

mediapipe/calculators/core/BUILD

@@ -13,16 +13,24 @@
 # limitations under the License.
 #
 
+load("@bazel_skylib//lib:selects.bzl", "selects")
 load("//mediapipe/framework/port:build_config.bzl", "mediapipe_proto_library")
 
 licenses(["notice"])
 
-package(default_visibility = ["//visibility:private"])
+package(default_visibility = ["//visibility:public"])
+
+selects.config_setting_group(
+    name = "ios_or_disable_gpu",
+    match_any = [
+        "//mediapipe/gpu:disable_gpu",
+        "//mediapipe:ios",
+    ],
+)
 
 mediapipe_proto_library(
     name = "concatenate_vector_calculator_proto",
     srcs = ["concatenate_vector_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -32,7 +40,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "dequantize_byte_array_calculator_proto",
     srcs = ["dequantize_byte_array_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -42,7 +49,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "packet_cloner_calculator_proto",
     srcs = ["packet_cloner_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -52,7 +58,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "packet_resampler_calculator_proto",
     srcs = ["packet_resampler_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -62,7 +67,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "packet_thinner_calculator_proto",
     srcs = ["packet_thinner_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -72,7 +76,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "split_vector_calculator_proto",
     srcs = ["split_vector_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -82,7 +85,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "quantize_float_vector_calculator_proto",
     srcs = ["quantize_float_vector_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -92,7 +94,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "sequence_shift_calculator_proto",
     srcs = ["sequence_shift_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -102,7 +103,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "gate_calculator_proto",
     srcs = ["gate_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -112,7 +112,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "constant_side_packet_calculator_proto",
     srcs = ["constant_side_packet_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -124,7 +123,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "clip_vector_size_calculator_proto",
     srcs = ["clip_vector_size_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -134,7 +132,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "flow_limiter_calculator_proto",
     srcs = ["flow_limiter_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -144,7 +141,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "graph_profile_calculator_proto",
     srcs = ["graph_profile_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -154,7 +150,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "get_vector_item_calculator_proto",
     srcs = ["get_vector_item_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -164,7 +159,6 @@ mediapipe_proto_library(
 cc_library(
     name = "add_header_calculator",
     srcs = ["add_header_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/api2:node",
@@ -193,7 +187,6 @@ cc_library(
     name = "begin_loop_calculator",
     srcs = ["begin_loop_calculator.cc"],
     hdrs = ["begin_loop_calculator.h"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_context",
         "//mediapipe/framework:calculator_contract",
@@ -216,7 +209,6 @@ cc_library(
     name = "end_loop_calculator",
     srcs = ["end_loop_calculator.cc"],
     hdrs = ["end_loop_calculator.h"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_context",
         "//mediapipe/framework:calculator_contract",
@@ -258,7 +250,6 @@ cc_test(
 cc_library(
     name = "concatenate_vector_calculator_hdr",
     hdrs = ["concatenate_vector_calculator.h"],
-    visibility = ["//visibility:public"],
     deps = [
         ":concatenate_vector_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -284,7 +275,6 @@ cc_library(
         ],
         "//conditions:default": [],
     }),
-    visibility = ["//visibility:public"],
     deps = [
         ":concatenate_vector_calculator_cc_proto",
         "//mediapipe/framework/api2:node",
@@ -311,7 +301,6 @@ cc_library(
 cc_library(
     name = "concatenate_detection_vector_calculator",
     srcs = ["concatenate_detection_vector_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":concatenate_vector_calculator",
         "//mediapipe/framework:calculator_framework",
@@ -323,7 +312,6 @@ cc_library(
 cc_library(
     name = "concatenate_proto_list_calculator",
     srcs = ["concatenate_proto_list_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":concatenate_vector_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -341,7 +329,6 @@ cc_test(
     srcs = ["concatenate_proto_list_calculator_test.cc"],
     deps = [
         ":concatenate_proto_list_calculator",
-        ":concatenate_vector_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework:calculator_runner",
         "//mediapipe/framework:timestamp",
@@ -373,7 +360,6 @@ cc_library(
     name = "clip_vector_size_calculator",
     srcs = ["clip_vector_size_calculator.cc"],
     hdrs = ["clip_vector_size_calculator.h"],
-    visibility = ["//visibility:public"],
     deps = [
         ":clip_vector_size_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -389,7 +375,6 @@ cc_library(
 cc_library(
     name = "clip_detection_vector_size_calculator",
     srcs = ["clip_detection_vector_size_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":clip_vector_size_calculator",
         "//mediapipe/framework:calculator_framework",
@@ -403,7 +388,6 @@ cc_test(
     srcs = ["clip_vector_size_calculator_test.cc"],
     deps = [
         ":clip_vector_size_calculator",
-        "//mediapipe/calculators/core:packet_resampler_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework:calculator_runner",
         "//mediapipe/framework:timestamp",
@@ -417,9 +401,6 @@ cc_test(
 cc_library(
     name = "counting_source_calculator",
     srcs = ["counting_source_calculator.cc"],
-    visibility = [
-        "//visibility:public",
-    ],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/port:ret_check",
@@ -432,9 +413,6 @@ cc_library(
 cc_library(
     name = "make_pair_calculator",
     srcs = ["make_pair_calculator.cc"],
-    visibility = [
-        "//visibility:public",
-    ],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/api2:node",
@@ -463,9 +441,6 @@ cc_test(
 cc_library(
     name = "matrix_multiply_calculator",
     srcs = ["matrix_multiply_calculator.cc"],
-    visibility = [
-        "//visibility:public",
-    ],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/api2:node",
@@ -479,9 +454,6 @@ cc_library(
 cc_library(
     name = "matrix_subtract_calculator",
     srcs = ["matrix_subtract_calculator.cc"],
-    visibility = [
-        "//visibility:public",
-    ],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/api2:node",
@@ -495,9 +467,6 @@ cc_library(
 cc_library(
     name = "mux_calculator",
     srcs = ["mux_calculator.cc"],
-    visibility = [
-        "//visibility:public",
-    ],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/api2:node",
@@ -510,9 +479,6 @@ cc_library(
 cc_library(
     name = "non_zero_calculator",
     srcs = ["non_zero_calculator.cc"],
-    visibility = [
-        "//visibility:public",
-    ],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/api2:node",
@@ -558,9 +524,6 @@ cc_test(
 cc_library(
     name = "packet_cloner_calculator",
     srcs = ["packet_cloner_calculator.cc"],
-    visibility = [
-        "//visibility:public",
-    ],
     deps = [
         ":packet_cloner_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -589,7 +552,6 @@ cc_test(
 cc_library(
     name = "packet_inner_join_calculator",
     srcs = ["packet_inner_join_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/port:ret_check",
@@ -613,9 +575,8 @@ cc_test(
 cc_library(
     name = "packet_thinner_calculator",
     srcs = ["packet_thinner_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
-        "//mediapipe/calculators/core:packet_thinner_calculator_cc_proto",
+        ":packet_thinner_calculator_cc_proto",
         "//mediapipe/framework:calculator_context",
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/formats:video_stream_header",
@@ -632,7 +593,7 @@ cc_test(
     srcs = ["packet_thinner_calculator_test.cc"],
     deps = [
         ":packet_thinner_calculator",
-        "//mediapipe/calculators/core:packet_thinner_calculator_cc_proto",
+        ":packet_thinner_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework:calculator_runner",
         "//mediapipe/framework/formats:video_stream_header",
@@ -645,9 +606,6 @@ cc_test(
 cc_library(
     name = "pass_through_calculator",
     srcs = ["pass_through_calculator.cc"],
-    visibility = [
-        "//visibility:public",
-    ],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/port:status",
@@ -658,9 +616,6 @@ cc_library(
 cc_library(
     name = "round_robin_demux_calculator",
     srcs = ["round_robin_demux_calculator.cc"],
-    visibility = [
-        "//visibility:public",
-    ],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/api2:node",
@@ -672,9 +627,6 @@ cc_library(
 cc_library(
     name = "immediate_mux_calculator",
     srcs = ["immediate_mux_calculator.cc"],
-    visibility = [
-        "//visibility:public",
-    ],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/port:ret_check",
@@ -686,7 +638,6 @@ cc_library(
 cc_library(
     name = "packet_presence_calculator",
     srcs = ["packet_presence_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework:packet",
@@ -715,7 +666,6 @@ cc_test(
 cc_library(
     name = "previous_loopback_calculator",
     srcs = ["previous_loopback_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework:packet",
@@ -731,7 +681,6 @@ cc_library(
 cc_library(
     name = "flow_limiter_calculator",
     srcs = ["flow_limiter_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":flow_limiter_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -748,7 +697,6 @@ cc_library(
 cc_library(
     name = "string_to_int_calculator",
     srcs = ["string_to_int_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/port:integral_types",
@@ -761,7 +709,6 @@ cc_library(
 cc_library(
     name = "default_side_packet_calculator",
     srcs = ["default_side_packet_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/port:ret_check",
@@ -773,7 +720,6 @@ cc_library(
 cc_library(
     name = "side_packet_to_stream_calculator",
     srcs = ["side_packet_to_stream_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/port:logging",
@@ -824,11 +770,8 @@ cc_library(
     name = "packet_resampler_calculator",
     srcs = ["packet_resampler_calculator.cc"],
     hdrs = ["packet_resampler_calculator.h"],
-    visibility = [
-        "//visibility:public",
-    ],
     deps = [
-        "//mediapipe/calculators/core:packet_resampler_calculator_cc_proto",
+        ":packet_resampler_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework:collection_item_id",
         "//mediapipe/framework/deps:mathutil",
@@ -852,7 +795,7 @@ cc_test(
     ],
     deps = [
         ":packet_resampler_calculator",
-        "//mediapipe/calculators/core:packet_resampler_calculator_cc_proto",
+        ":packet_resampler_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework:calculator_runner",
         "//mediapipe/framework/formats:video_stream_header",
@@ -886,7 +829,6 @@ cc_test(
 cc_test(
     name = "matrix_multiply_calculator_test",
     srcs = ["matrix_multiply_calculator_test.cc"],
-    visibility = ["//visibility:private"],
     deps = [
         ":matrix_multiply_calculator",
         "//mediapipe/framework:calculator_framework",
@@ -902,7 +844,6 @@ cc_test(
 cc_test(
     name = "matrix_subtract_calculator_test",
     srcs = ["matrix_subtract_calculator_test.cc"],
-    visibility = ["//visibility:private"],
     deps = [
         ":matrix_subtract_calculator",
         "//mediapipe/framework:calculator_framework",
@@ -920,10 +861,10 @@ cc_test(
     name = "flow_limiter_calculator_test",
     srcs = ["flow_limiter_calculator_test.cc"],
     deps = [
+        ":counting_source_calculator",
         ":flow_limiter_calculator",
         ":flow_limiter_calculator_cc_proto",
-        "//mediapipe/calculators/core:counting_source_calculator",
+        ":pass_through_calculator",
-        "//mediapipe/calculators/core:pass_through_calculator",
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework:calculator_runner",
         "//mediapipe/framework:test_calculators",
@@ -952,14 +893,13 @@ cc_library(
         ],
         "//conditions:default": [],
     }),
-    visibility = ["//visibility:public"],
     deps = [
         ":split_vector_calculator_cc_proto",
         "//mediapipe/framework/formats:detection_cc_proto",
-        "//mediapipe/framework:calculator_framework",
-        "//mediapipe/framework/formats:landmark_cc_proto",
         "//mediapipe/framework/formats:classification_cc_proto",
+        "//mediapipe/framework/formats:landmark_cc_proto",
         "//mediapipe/framework/formats:rect_cc_proto",
+        "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/formats:matrix",
         "//mediapipe/framework/formats:tensor",
         "//mediapipe/framework/port:ret_check",
@@ -968,8 +908,7 @@ cc_library(
         "@org_tensorflow//tensorflow/lite:framework",
         "@org_tensorflow//tensorflow/lite/kernels:builtin_ops",
     ] + select({
-        "//mediapipe/gpu:disable_gpu": [],
+        ":ios_or_disable_gpu": [],
-        "//mediapipe:ios": [],
         "//conditions:default": [
             "@org_tensorflow//tensorflow/lite/delegates/gpu/gl:gl_buffer",
         ],
@@ -998,7 +937,6 @@ cc_test(
 cc_library(
     name = "split_proto_list_calculator",
     srcs = ["split_proto_list_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":split_vector_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -1030,7 +968,6 @@ cc_test(
 cc_library(
     name = "dequantize_byte_array_calculator",
     srcs = ["dequantize_byte_array_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":dequantize_byte_array_calculator_cc_proto",
         "//mediapipe/framework:calculator_context",
@@ -1056,7 +993,6 @@ cc_test(
 cc_library(
     name = "quantize_float_vector_calculator",
     srcs = ["quantize_float_vector_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":quantize_float_vector_calculator_cc_proto",
         "//mediapipe/framework:calculator_context",
@@ -1082,7 +1018,6 @@ cc_test(
 cc_library(
     name = "sequence_shift_calculator",
     srcs = ["sequence_shift_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":sequence_shift_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -1107,7 +1042,6 @@ cc_test(
 cc_library(
     name = "gate_calculator",
     srcs = ["gate_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":gate_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -1133,7 +1067,6 @@ cc_test(
 cc_library(
     name = "matrix_to_vector_calculator",
     srcs = ["matrix_to_vector_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/api2:node",
@@ -1169,7 +1102,6 @@ cc_test(
 cc_library(
     name = "merge_calculator",
     srcs = ["merge_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/api2:node",
@@ -1195,7 +1127,6 @@ cc_test(
 cc_library(
     name = "stream_to_side_packet_calculator",
     srcs = ["stream_to_side_packet_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework:timestamp",
@@ -1221,7 +1152,6 @@ cc_test(
 cc_library(
     name = "constant_side_packet_calculator",
     srcs = ["constant_side_packet_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":constant_side_packet_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -1251,7 +1181,6 @@ cc_test(
 cc_library(
     name = "graph_profile_calculator",
     srcs = ["graph_profile_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":graph_profile_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -1293,7 +1222,6 @@ cc_library(
     name = "get_vector_item_calculator",
     srcs = ["get_vector_item_calculator.cc"],
     hdrs = ["get_vector_item_calculator.h"],
-    visibility = ["//visibility:public"],
     deps = [
         ":get_vector_item_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -1301,6 +1229,7 @@ cc_library(
         "//mediapipe/framework/api2:packet",
         "//mediapipe/framework/api2:port",
         "//mediapipe/framework/formats:classification_cc_proto",
+        "//mediapipe/framework/formats:detection_cc_proto",
         "//mediapipe/framework/formats:landmark_cc_proto",
         "//mediapipe/framework/port:ret_check",
         "//mediapipe/framework/port:status",
@@ -1326,7 +1255,6 @@ cc_library(
     name = "vector_indices_calculator",
     srcs = ["vector_indices_calculator.cc"],
     hdrs = ["vector_indices_calculator.h"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/api2:node",
@@ -1352,7 +1280,6 @@ cc_library(
     name = "vector_size_calculator",
     srcs = ["vector_size_calculator.cc"],
     hdrs = ["vector_size_calculator.h"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/api2:node",
@@ -1366,9 +1293,6 @@ cc_library(
 cc_library(
     name = "packet_sequencer_calculator",
     srcs = ["packet_sequencer_calculator.cc"],
-    visibility = [
-        "//visibility:public",
-    ],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/api2:contract",
@@ -1386,7 +1310,7 @@ cc_test(
     srcs = ["packet_sequencer_calculator_test.cc"],
     deps = [
         ":packet_sequencer_calculator",
-        "//mediapipe/calculators/core:pass_through_calculator",
+        ":pass_through_calculator",
         "//mediapipe/framework:calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework:subgraph",
@@ -1403,11 +1327,12 @@ cc_library(
     name = "merge_to_vector_calculator",
     srcs = ["merge_to_vector_calculator.cc"],
     hdrs = ["merge_to_vector_calculator.h"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_framework",
+        "//mediapipe/framework:packet",
         "//mediapipe/framework/api2:node",
         "//mediapipe/framework/api2:port",
+        "//mediapipe/framework/formats:detection_cc_proto",
         "//mediapipe/framework/formats:image",
         "@com_google_absl//absl/status",
     ],
@@ -1417,7 +1342,6 @@ cc_library(
 mediapipe_proto_library(
     name = "bypass_calculator_proto",
     srcs = ["bypass_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -1427,7 +1351,6 @@ mediapipe_proto_library(
 cc_library(
     name = "bypass_calculator",
     srcs = ["bypass_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":bypass_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",

mediapipe/calculators/core/begin_loop_calculator.h

@@ -49,7 +49,7 @@ namespace mediapipe {
 //   calculator:    "EndLoopWithOutputCalculator"
 //   input_stream:  "ITEM:output_of_loop_body"     # ItemU     @loop_internal_ts
 //   input_stream:  "BATCH_END:ext_ts"             # Timestamp @loop_internal_ts
-//   output_stream: "OUTPUT:aggregated_result"     # IterableU @ext_ts
+//   output_stream: "ITERABLE:aggregated_result"   # IterableU @ext_ts
 // }
 //
 // Input streams tagged with "CLONE" are cloned to the corresponding output

mediapipe/calculators/core/bypass_calculator.cc

@@ -111,6 +111,10 @@ class BypassCalculator : public Node {
         cc->Outputs().Get(id).SetAny();
       }
     }
+    for (auto id = cc->InputSidePackets().BeginId();
+         id != cc->InputSidePackets().EndId(); ++id) {
+      cc->InputSidePackets().Get(id).SetAny();
+    }
     return absl::OkStatus();
   }
 

mediapipe/calculators/core/flow_limiter_calculator_test.cc

@@ -85,75 +85,6 @@ std::string SourceString(Timestamp t) {
              : absl::StrCat("Timestamp(", t.DebugString(), ")");
 }
 
-template <typename T>
-std::string SourceString(Packet packet) {
-  std::ostringstream oss;
-  if (packet.IsEmpty()) {
-    oss << "Packet()";
-  } else {
-    oss << "MakePacket<" << MediaPipeTypeStringOrDemangled<T>() << ">("
-        << packet.Get<T>() << ")";
-  }
-  oss << ".At(" << SourceString(packet.Timestamp()) << ")";
-  return oss.str();
-}
-
-template <typename PacketContainer, typename PacketContent>
-class PacketsEqMatcher
-    : public ::testing::MatcherInterface<const PacketContainer&> {
- public:
-  PacketsEqMatcher(PacketContainer packets) : packets_(packets) {}
-  void DescribeTo(::std::ostream* os) const override {
-    *os << "The expected packet contents: \n";
-    Print(packets_, os);
-  }
-  bool MatchAndExplain(
-      const PacketContainer& value,
-      ::testing::MatchResultListener* listener) const override {
-    if (!Equals(packets_, value)) {
-      if (listener->IsInterested()) {
-        *listener << "The actual packet contents: \n";
-        Print(value, listener->stream());
-      }
-      return false;
-    }
-    return true;
-  }
-
- private:
-  bool Equals(const PacketContainer& c1, const PacketContainer& c2) const {
-    if (c1.size() != c2.size()) {
-      return false;
-    }
-    for (auto i1 = c1.begin(), i2 = c2.begin(); i1 != c1.end(); ++i1, ++i2) {
-      Packet p1 = *i1, p2 = *i2;
-      if (p1.Timestamp() != p2.Timestamp() || p1.IsEmpty() != p2.IsEmpty() ||
-          (!p1.IsEmpty() &&
-           p1.Get<PacketContent>() != p2.Get<PacketContent>())) {
-        return false;
-      }
-    }
-    return true;
-  }
-  void Print(const PacketContainer& packets, ::std::ostream* os) const {
-    for (auto it = packets.begin(); it != packets.end(); ++it) {
-      const Packet& packet = *it;
-      *os << (it == packets.begin() ? "{" : "");
-      *os << SourceString<PacketContent>(packet);
-      *os << (std::next(it) == packets.end() ? "}" : ", ");
-    }
-  }
-
-  const PacketContainer packets_;
-};
-
-template <typename PacketContainer, typename PacketContent>
-::testing::Matcher<const PacketContainer&> PacketsEq(
-    const PacketContainer& packets) {
-  return MakeMatcher(
-      new PacketsEqMatcher<PacketContainer, PacketContent>(packets));
-}
-
 // A Calculator::Process callback function.
 typedef std::function<absl::Status(const InputStreamShardSet&,
                                    OutputStreamShardSet*)>
@@ -743,9 +674,6 @@ TEST_F(FlowLimiterCalculatorTest, TwoInputStreams) {
 // The processing time "sleep_time" is reduced from 22ms to 12ms to create
 // the same frame rate as FlowLimiterCalculatorTest::TwoInputStreams.
 TEST_F(FlowLimiterCalculatorTest, ZeroQueue) {
-  auto BoolPacketsEq = PacketsEq<std::vector<Packet>, bool>;
-  auto IntPacketsEq = PacketsEq<std::vector<Packet>, int>;
-
   // Configure the test.
   SetUpInputData();
   SetUpSimulationClock();
@@ -839,13 +767,16 @@ TEST_F(FlowLimiterCalculatorTest, ZeroQueue) {
       input_packets_[0],  input_packets_[2],  input_packets_[15],
       input_packets_[17], input_packets_[19],
   };
-  EXPECT_THAT(out_1_packets_, IntPacketsEq(expected_output));
+  EXPECT_THAT(out_1_packets_,
+              ElementsAreArray(PacketMatchers<int>(expected_output)));
+
   // Exactly the timestamps released by FlowLimiterCalculator for in_1_sampled.
   std::vector<Packet> expected_output_2 = {
       input_packets_[0],  input_packets_[2],  input_packets_[4],
       input_packets_[15], input_packets_[17], input_packets_[19],
   };
-  EXPECT_THAT(out_2_packets, IntPacketsEq(expected_output_2));
+  EXPECT_THAT(out_2_packets,
+              ElementsAreArray(PacketMatchers<int>(expected_output_2)));
 
   // Validate the ALLOW stream output.
   std::vector<Packet> expected_allow = {
@@ -871,7 +802,8 @@ TEST_F(FlowLimiterCalculatorTest, ZeroQueue) {
       MakePacket<bool>(true).At(Timestamp(190000)),
       MakePacket<bool>(false).At(Timestamp(200000)),
   };
-  EXPECT_THAT(allow_packets_, BoolPacketsEq(expected_allow));
+  EXPECT_THAT(allow_packets_,
+              ElementsAreArray(PacketMatchers<bool>(expected_allow)));
 }
 
 std::vector<Packet> StripBoundsUpdates(const std::vector<Packet>& packets,
@@ -891,9 +823,6 @@ std::vector<Packet> StripBoundsUpdates(const std::vector<Packet>& packets,
 // Shows how FlowLimiterCalculator releases auxiliary input packets.
 // In this test, auxiliary input packets arrive at twice the primary rate.
 TEST_F(FlowLimiterCalculatorTest, AuxiliaryInputs) {
-  auto BoolPacketsEq = PacketsEq<std::vector<Packet>, bool>;
-  auto IntPacketsEq = PacketsEq<std::vector<Packet>, int>;
-
   // Configure the test.
   SetUpInputData();
   SetUpSimulationClock();
@@ -1011,7 +940,8 @@ TEST_F(FlowLimiterCalculatorTest, AuxiliaryInputs) {
       MakePacket<int>(6).At(Timestamp(60000)),
       Packet().At(Timestamp(80000)),
   };
-  EXPECT_THAT(out_1_packets_, IntPacketsEq(expected_output));
+  EXPECT_THAT(out_1_packets_,
+              ElementsAreArray(PacketMatchers<int>(expected_output)));
 
   // Packets following input packets 2 and 6, and not input packets 4 and 8.
   std::vector<Packet> expected_auxiliary_output = {
@@ -1031,12 +961,13 @@ TEST_F(FlowLimiterCalculatorTest, AuxiliaryInputs) {
   };
   std::vector<Packet> actual_2 =
       StripBoundsUpdates(out_2_packets, Timestamp(90000));
-  EXPECT_THAT(actual_2, IntPacketsEq(expected_auxiliary_output));
+  EXPECT_THAT(actual_2,
+              ElementsAreArray(PacketMatchers<int>(expected_auxiliary_output)));
   std::vector<Packet> expected_3 =
       StripBoundsUpdates(expected_auxiliary_output, Timestamp(39999));
   std::vector<Packet> actual_3 =
       StripBoundsUpdates(out_3_packets, Timestamp(39999));
-  EXPECT_THAT(actual_3, IntPacketsEq(expected_3));
+  EXPECT_THAT(actual_3, ElementsAreArray(PacketMatchers<int>(expected_3)));
 
   // Validate the ALLOW stream output.
   std::vector<Packet> expected_allow = {
@@ -1045,7 +976,8 @@ TEST_F(FlowLimiterCalculatorTest, AuxiliaryInputs) {
       MakePacket<bool>(true).At(Timestamp(60000)),
       MakePacket<bool>(false).At(Timestamp(80000)),
   };
-  EXPECT_THAT(allow_packets_, BoolPacketsEq(expected_allow));
+  EXPECT_THAT(allow_packets_,
+              ElementsAreArray(PacketMatchers<bool>(expected_allow)));
 }
 
 }  // anonymous namespace

mediapipe/calculators/core/get_vector_item_calculator.cc

@@ -15,6 +15,7 @@
 #include "mediapipe/calculators/core/get_vector_item_calculator.h"
 
 #include "mediapipe/framework/formats/classification.pb.h"
+#include "mediapipe/framework/formats/detection.pb.h"
 #include "mediapipe/framework/formats/landmark.pb.h"
 
 namespace mediapipe {
@@ -32,5 +33,9 @@ using GetClassificationListVectorItemCalculator =
     GetVectorItemCalculator<mediapipe::ClassificationList>;
 REGISTER_CALCULATOR(GetClassificationListVectorItemCalculator);
 
+using GetDetectionVectorItemCalculator =
+    GetVectorItemCalculator<mediapipe::Detection>;
+REGISTER_CALCULATOR(GetDetectionVectorItemCalculator);
+
 }  // namespace api2
 }  // namespace mediapipe

mediapipe/calculators/core/get_vector_item_calculator.h

@@ -47,7 +47,7 @@ namespace api2 {
 //     calculator: "Get{SpecificType}VectorItemCalculator"
 //     input_stream: "VECTOR:vector"
 //     input_stream: "INDEX:index"
-//     input_stream: "ITEM:item"
+//     output_stream: "ITEM:item"
 //     options {
 //       [mediapipe.GetVectorItemCalculatorOptions.ext] {
 //         item_index: 5
@@ -65,6 +65,7 @@ class GetVectorItemCalculator : public Node {
   MEDIAPIPE_NODE_CONTRACT(kIn, kIdx, kOut);
 
   absl::Status Open(CalculatorContext* cc) final {
+    cc->SetOffset(mediapipe::TimestampDiff(0));
     auto& options = cc->Options<mediapipe::GetVectorItemCalculatorOptions>();
     RET_CHECK(kIdx(cc).IsConnected() || options.has_item_index());
     return absl::OkStatus();
@@ -90,8 +91,12 @@ class GetVectorItemCalculator : public Node {
       return absl::OkStatus();
     }
 
-    RET_CHECK(idx >= 0 && idx < items.size());
+    RET_CHECK(idx >= 0);
-    kOut(cc).Send(items[idx]);
+    RET_CHECK(options.output_empty_on_oob() || idx < items.size());
+
+    if (idx < items.size()) {
+      kOut(cc).Send(items[idx]);
+    }
 
     return absl::OkStatus();
   }

mediapipe/calculators/core/get_vector_item_calculator.proto

@@ -26,4 +26,7 @@ message GetVectorItemCalculatorOptions {
   // Index of vector item to get. INDEX input stream can be used instead, or to
   // override.
   optional int32 item_index = 1;
+
+  // Set to true to output an empty packet when the index is out of bounds.
+  optional bool output_empty_on_oob = 2;
 }

mediapipe/calculators/core/get_vector_item_calculator_test.cc

@@ -32,18 +32,21 @@ CalculatorRunner MakeRunnerWithStream() {
   )");
 }
 
-CalculatorRunner MakeRunnerWithOptions(int set_index) {
+CalculatorRunner MakeRunnerWithOptions(int set_index,
-  return CalculatorRunner(absl::StrFormat(R"(
+                                       bool output_empty_on_oob = false) {
+  return CalculatorRunner(
+      absl::StrFormat(R"(
     calculator: "TestGetIntVectorItemCalculator"
     input_stream: "VECTOR:vector_stream"
     output_stream: "ITEM:item_stream"
     options {
       [mediapipe.GetVectorItemCalculatorOptions.ext] {
         item_index: %d
+        output_empty_on_oob: %s
       }
     }
   )",
-                                          set_index));
+                      set_index, output_empty_on_oob ? "true" : "false"));
 }
 
 void AddInputVector(CalculatorRunner& runner, const std::vector<int>& inputs,
@@ -140,8 +143,7 @@ TEST(TestGetIntVectorItemCalculatorTest, StreamIndexBoundsCheckFail1) {
 
   absl::Status status = runner.Run();
   ASSERT_FALSE(status.ok());
-  EXPECT_THAT(status.message(),
+  EXPECT_THAT(status.message(), testing::HasSubstr("idx >= 0"));
-              testing::HasSubstr("idx >= 0 && idx < items.size()"));
 }
 
 TEST(TestGetIntVectorItemCalculatorTest, StreamIndexBoundsCheckFail2) {
@@ -155,7 +157,8 @@ TEST(TestGetIntVectorItemCalculatorTest, StreamIndexBoundsCheckFail2) {
   absl::Status status = runner.Run();
   ASSERT_FALSE(status.ok());
   EXPECT_THAT(status.message(),
-              testing::HasSubstr("idx >= 0 && idx < items.size()"));
+              testing::HasSubstr(
+                  "options.output_empty_on_oob() || idx < items.size()"));
 }
 
 TEST(TestGetIntVectorItemCalculatorTest, OptionsIndexBoundsCheckFail1) {
@@ -167,8 +170,7 @@ TEST(TestGetIntVectorItemCalculatorTest, OptionsIndexBoundsCheckFail1) {
 
   absl::Status status = runner.Run();
   ASSERT_FALSE(status.ok());
-  EXPECT_THAT(status.message(),
+  EXPECT_THAT(status.message(), testing::HasSubstr("idx >= 0"));
-              testing::HasSubstr("idx >= 0 && idx < items.size()"));
 }
 
 TEST(TestGetIntVectorItemCalculatorTest, OptionsIndexBoundsCheckFail2) {
@@ -181,7 +183,21 @@ TEST(TestGetIntVectorItemCalculatorTest, OptionsIndexBoundsCheckFail2) {
   absl::Status status = runner.Run();
   ASSERT_FALSE(status.ok());
   EXPECT_THAT(status.message(),
-              testing::HasSubstr("idx >= 0 && idx < items.size()"));
+              testing::HasSubstr(
+                  "options.output_empty_on_oob() || idx < items.size()"));
+}
+
+TEST(TestGetIntVectorItemCalculatorTest, OptionsIndexBoundsCheckFail3) {
+  const int try_index = 3;
+  CalculatorRunner runner = MakeRunnerWithOptions(try_index, true);
+  const std::vector<int> inputs = {1, 2, 3};
+
+  AddInputVector(runner, inputs, 1);
+
+  MP_ASSERT_OK(runner.Run());
+
+  const std::vector<Packet>& outputs = runner.Outputs().Tag("ITEM").packets;
+  EXPECT_THAT(outputs, testing::ElementsAre());
 }
 
 TEST(TestGetIntVectorItemCalculatorTest, IndexStreamTwoTimestamps) {

mediapipe/calculators/core/merge_to_vector_calculator.cc

@@ -15,6 +15,7 @@ limitations under the License.
 
 #include "mediapipe/calculators/core/merge_to_vector_calculator.h"
 
+#include "mediapipe/framework/formats/detection.pb.h"
 #include "mediapipe/framework/formats/image.h"
 
 namespace mediapipe {
@@ -23,5 +24,13 @@ namespace api2 {
 typedef MergeToVectorCalculator<mediapipe::Image> MergeImagesToVectorCalculator;
 MEDIAPIPE_REGISTER_NODE(MergeImagesToVectorCalculator);
 
+typedef MergeToVectorCalculator<mediapipe::GpuBuffer>
+    MergeGpuBuffersToVectorCalculator;
+MEDIAPIPE_REGISTER_NODE(MergeGpuBuffersToVectorCalculator);
+
+typedef MergeToVectorCalculator<mediapipe::Detection>
+    MergeDetectionsToVectorCalculator;
+MEDIAPIPE_REGISTER_NODE(MergeDetectionsToVectorCalculator);
+
 }  // namespace api2
 }  // namespace mediapipe

mediapipe/calculators/core/merge_to_vector_calculator.h

@@ -42,11 +42,20 @@ class MergeToVectorCalculator : public Node {
     return absl::OkStatus();
   }
 
+  absl::Status Open(::mediapipe::CalculatorContext* cc) {
+    cc->SetOffset(::mediapipe::TimestampDiff(0));
+    return absl::OkStatus();
+  }
+
   absl::Status Process(CalculatorContext* cc) {
     const int input_num = kIn(cc).Count();
-    std::vector<T> output_vector(input_num);
+    std::vector<T> output_vector;
-    std::transform(kIn(cc).begin(), kIn(cc).end(), output_vector.begin(),
+    for (auto it = kIn(cc).begin(); it != kIn(cc).end(); it++) {
-                   [](const auto& elem) -> T { return elem.Get(); });
+      const auto& elem = *it;
+      if (!elem.IsEmpty()) {
+        output_vector.push_back(elem.Get());
+      }
+    }
     kOut(cc).Send(output_vector);
     return absl::OkStatus();
   }

mediapipe/calculators/core/mux_calculator.cc

@@ -41,6 +41,10 @@ class MuxCalculator : public Node {
                           StreamHandler("MuxInputStreamHandler"));
 
   absl::Status Process(CalculatorContext* cc) final {
+    if (kSelect(cc).IsStream() && kSelect(cc).IsEmpty()) {
+      return absl::OkStatus();
+    }
+
     int select = *kSelect(cc);
     RET_CHECK(0 <= select && select < kIn(cc).Count());
     if (!kIn(cc)[select].IsEmpty()) {

mediapipe/calculators/core/mux_calculator_test.cc

@@ -398,6 +398,95 @@ TEST(MuxCalculatorTest, HandleTimestampBoundUpdates) {
   MP_ASSERT_OK(graph.WaitUntilDone());
 }
 
+TEST(MuxCalculatorTest, HandlesCloseGracefully) {
+  CalculatorGraphConfig config =
+      mediapipe::ParseTextProtoOrDie<CalculatorGraphConfig>(
+          R"pb(
+            input_stream: "select"
+            input_stream: "value_0"
+            input_stream: "value_1"
+            node {
+              calculator: "MuxCalculator"
+              input_stream: "SELECT:select"
+              input_stream: "INPUT:0:value_0"
+              input_stream: "INPUT:1:value_1"
+              output_stream: "OUTPUT:output"
+            }
+          )pb");
+  CalculatorGraph graph;
+  MP_ASSERT_OK(graph.Initialize(config));
+
+  // Observe packets.
+  std::vector<Packet> output_packets;
+  MP_ASSERT_OK(graph.ObserveOutputStream(
+      "output",
+      [&output_packets](const Packet& p) -> absl::Status {
+        output_packets.push_back(p);
+        return absl::OkStatus();
+      },
+      /*observe_timestamp_bounds=*/true));
+
+  // Start graph.
+  MP_ASSERT_OK(graph.StartRun({}));
+
+  // Add single packet wait for completion and close.
+  MP_ASSERT_OK(graph.AddPacketToInputStream(
+      "value_0", MakePacket<int>(0).At(Timestamp(1000))));
+  MP_ASSERT_OK(graph.WaitUntilIdle());
+  MP_ASSERT_OK(graph.CloseAllInputStreams());
+  MP_ASSERT_OK(graph.WaitUntilDone());
+
+  EXPECT_TRUE(output_packets.empty());
+}
+
+TEST(MuxCalculatorTest, HandlesCloseGracefullyWithDeafultInputStreamHandler) {
+  CalculatorGraphConfig config =
+      mediapipe::ParseTextProtoOrDie<CalculatorGraphConfig>(
+          R"pb(
+            # This is required in order for EXPECT_DEATH to work everywhere
+            executor { name: "" type: "ApplicationThreadExecutor" }
+
+            input_stream: "select"
+            input_stream: "value_0"
+            input_stream: "value_1"
+            node {
+              calculator: "MuxCalculator"
+              input_stream: "SELECT:select"
+              input_stream: "INPUT:0:value_0"
+              input_stream: "INPUT:1:value_1"
+              output_stream: "OUTPUT:output"
+              input_stream_handler {
+                input_stream_handler: "DefaultInputStreamHandler"
+              }
+            }
+          )pb");
+  CalculatorGraph graph;
+  MP_ASSERT_OK(graph.Initialize(config));
+
+  // Observe packets.
+  std::vector<Packet> output_packets;
+  MP_ASSERT_OK(graph.ObserveOutputStream(
+      "output",
+      [&output_packets](const Packet& p) -> absl::Status {
+        output_packets.push_back(p);
+        return absl::OkStatus();
+      },
+      /*observe_timestamp_bounds=*/true));
+
+  // Start graph.
+  MP_ASSERT_OK(graph.StartRun({}));
+
+  // Add single packet wait for completion and close.
+  MP_ASSERT_OK(graph.AddPacketToInputStream(
+      "value_0", MakePacket<int>(0).At(Timestamp(1000))));
+  MP_ASSERT_OK(graph.WaitUntilIdle());
+  MP_ASSERT_OK(graph.CloseAllInputStreams());
+  MP_ASSERT_OK(graph.WaitUntilDone());
+
+  ASSERT_EQ(output_packets.size(), 1);
+  EXPECT_TRUE(output_packets[0].IsEmpty());
+}
+
 }  // namespace
 
 }  // namespace mediapipe

mediapipe/calculators/core/real_time_flow_limiter_calculator.cc

@@ -76,7 +76,11 @@ constexpr char kMaxInFlightTag[] = "MAX_IN_FLIGHT";
 //   }
 //   output_stream: "gated_frames"
 // }
-class RealTimeFlowLimiterCalculator : public CalculatorBase {
+//
+// Please use FlowLimiterCalculator, which replaces this calculator and
+// defines a few additional configuration options.
+class ABSL_DEPRECATED("Use FlowLimiterCalculator instead.")
+    RealTimeFlowLimiterCalculator : public CalculatorBase {
  public:
   static absl::Status GetContract(CalculatorContract* cc) {
     int num_data_streams = cc->Inputs().NumEntries("");

mediapipe/calculators/core/sequence_shift_calculator.cc

@@ -66,12 +66,16 @@ class SequenceShiftCalculator : public Node {
   // The number of packets or timestamps we need to store to output packet[i] at
   // the timestamp of packet[i + packet_offset]; equal to abs(packet_offset).
   int cache_size_;
+  bool emit_empty_packets_before_first_packet_ = false;
 };
 MEDIAPIPE_REGISTER_NODE(SequenceShiftCalculator);
 
 absl::Status SequenceShiftCalculator::Open(CalculatorContext* cc) {
   packet_offset_ = kOffset(cc).GetOr(
       cc->Options<mediapipe::SequenceShiftCalculatorOptions>().packet_offset());
+  emit_empty_packets_before_first_packet_ =
+      cc->Options<mediapipe::SequenceShiftCalculatorOptions>()
+          .emit_empty_packets_before_first_packet();
   cache_size_ = abs(packet_offset_);
   // An offset of zero is a no-op, but someone might still request it.
   if (packet_offset_ == 0) {
@@ -96,6 +100,8 @@ void SequenceShiftCalculator::ProcessPositiveOffset(CalculatorContext* cc) {
     // Ready to output oldest packet with current timestamp.
     kOut(cc).Send(packet_cache_.front().At(cc->InputTimestamp()));
     packet_cache_.pop_front();
+  } else if (emit_empty_packets_before_first_packet_) {
+    LOG(FATAL) << "Not supported yet";
   }
   // Store current packet for later output.
   packet_cache_.push_back(kIn(cc).packet());

mediapipe/calculators/core/sequence_shift_calculator.proto

@@ -23,4 +23,8 @@ message SequenceShiftCalculatorOptions {
     optional SequenceShiftCalculatorOptions ext = 107633927;
   }
   optional int32 packet_offset = 1 [default = -1];
+
+  // Emits empty packets before the first delayed packet is emitted. Takes
+  // effect only when packet offset is set to positive.
+  optional bool emit_empty_packets_before_first_packet = 2 [default = false];
 }

mediapipe/calculators/image/BUILD

@@ -16,12 +16,11 @@ load("//mediapipe/framework/port:build_config.bzl", "mediapipe_proto_library")
 
 licenses(["notice"])
 
-package(default_visibility = ["//visibility:private"])
+package(default_visibility = ["//visibility:public"])
 
 mediapipe_proto_library(
     name = "opencv_image_encoder_calculator_proto",
     srcs = ["opencv_image_encoder_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -31,7 +30,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "scale_image_calculator_proto",
     srcs = ["scale_image_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -42,7 +40,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "set_alpha_calculator_proto",
     srcs = ["set_alpha_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -52,7 +49,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "image_cropping_calculator_proto",
     srcs = ["image_cropping_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -62,7 +58,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "bilateral_filter_calculator_proto",
     srcs = ["bilateral_filter_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -72,7 +67,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "recolor_calculator_proto",
     srcs = ["recolor_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -83,7 +77,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "segmentation_smoothing_calculator_proto",
     srcs = ["segmentation_smoothing_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -93,7 +86,6 @@ mediapipe_proto_library(
 cc_library(
     name = "color_convert_calculator",
     srcs = ["color_convert_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework:timestamp",
@@ -112,7 +104,6 @@ cc_library(
 cc_library(
     name = "opencv_encoded_image_to_image_frame_calculator",
     srcs = ["opencv_encoded_image_to_image_frame_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":opencv_encoded_image_to_image_frame_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -127,7 +118,6 @@ cc_library(
 cc_library(
     name = "opencv_image_encoder_calculator",
     srcs = ["opencv_image_encoder_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":opencv_image_encoder_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -142,7 +132,6 @@ cc_library(
 cc_library(
     name = "opencv_put_text_calculator",
     srcs = ["opencv_put_text_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/formats:image_frame_opencv",
@@ -156,11 +145,10 @@ cc_library(
 cc_library(
     name = "set_alpha_calculator",
     srcs = ["set_alpha_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":set_alpha_calculator_cc_proto",
-        "//mediapipe/framework:calculator_options_cc_proto",
         "//mediapipe/framework/formats:image_format_cc_proto",
+        "//mediapipe/framework:calculator_options_cc_proto",
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/formats:image_frame",
         "//mediapipe/framework/formats:image_frame_opencv",
@@ -183,11 +171,10 @@ cc_library(
 cc_library(
     name = "bilateral_filter_calculator",
     srcs = ["bilateral_filter_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":bilateral_filter_calculator_cc_proto",
-        "//mediapipe/framework:calculator_options_cc_proto",
         "//mediapipe/framework/formats:image_format_cc_proto",
+        "//mediapipe/framework:calculator_options_cc_proto",
         "@com_google_absl//absl/strings",
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/formats:image_frame",
@@ -212,13 +199,11 @@ cc_library(
 mediapipe_proto_library(
     name = "rotation_mode_proto",
     srcs = ["rotation_mode.proto"],
-    visibility = ["//visibility:public"],
 )
 
 mediapipe_proto_library(
     name = "image_transformation_calculator_proto",
     srcs = ["image_transformation_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         ":rotation_mode_proto",
         "//mediapipe/framework:calculator_options_proto",
@@ -243,7 +228,6 @@ cc_library(
         ],
         "//conditions:default": [],
     }),
-    visibility = ["//visibility:public"],
     deps = [
         ":rotation_mode_cc_proto",
         ":image_transformation_calculator_cc_proto",
@@ -287,13 +271,12 @@ cc_library(
         ],
         "//conditions:default": [],
     }),
-    visibility = ["//visibility:public"],
     deps = [
         ":image_cropping_calculator_cc_proto",
+        "//mediapipe/framework/formats:rect_cc_proto",
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/formats:image_frame",
         "//mediapipe/framework/formats:image_frame_opencv",
-        "//mediapipe/framework/formats:rect_cc_proto",
         "//mediapipe/framework/port:opencv_core",
         "//mediapipe/framework/port:opencv_imgproc",
         "//mediapipe/framework/port:ret_check",
@@ -330,7 +313,6 @@ cc_test(
 cc_library(
     name = "luminance_calculator",
     srcs = ["luminance_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework/port:ret_check",
         "//mediapipe/framework/port:status",
@@ -344,7 +326,6 @@ cc_library(
 cc_library(
     name = "sobel_edges_calculator",
     srcs = ["sobel_edges_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework/port:ret_check",
         "//mediapipe/framework/port:status",
@@ -358,15 +339,14 @@ cc_library(
 cc_library(
     name = "recolor_calculator",
     srcs = ["recolor_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":recolor_calculator_cc_proto",
+        "//mediapipe/util:color_cc_proto",
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/formats:image_frame",
         "//mediapipe/framework/formats:image_frame_opencv",
         "//mediapipe/framework/port:status",
         "//mediapipe/framework/port:ret_check",
-        "//mediapipe/util:color_cc_proto",
         "//mediapipe/framework/port:opencv_core",
         "//mediapipe/framework/port:opencv_imgproc",
     ] + select({
@@ -385,9 +365,6 @@ cc_library(
     name = "scale_image_utils",
     srcs = ["scale_image_utils.cc"],
     hdrs = ["scale_image_utils.h"],
-    visibility = [
-        "//mediapipe:__subpackages__",
-    ],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/port:logging",
@@ -400,12 +377,9 @@ cc_library(
 cc_library(
     name = "scale_image_calculator",
     srcs = ["scale_image_calculator.cc"],
-    visibility = [
-        "//visibility:public",
-    ],
     deps = [
+        ":scale_image_calculator_cc_proto",
         ":scale_image_utils",
-        "//mediapipe/calculators/image:scale_image_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/formats:image_format_cc_proto",
         "//mediapipe/framework/formats:image_frame",
@@ -429,7 +403,6 @@ cc_library(
 mediapipe_proto_library(
     name = "image_clone_calculator_proto",
     srcs = ["image_clone_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -439,7 +412,6 @@ mediapipe_proto_library(
 cc_library(
     name = "image_clone_calculator",
     srcs = ["image_clone_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":image_clone_calculator_cc_proto",
         "//mediapipe/framework/api2:node",
@@ -459,7 +431,6 @@ cc_library(
 cc_library(
     name = "image_properties_calculator",
     srcs = ["image_properties_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework/api2:node",
         "//mediapipe/framework:calculator_framework",
@@ -524,7 +495,6 @@ cc_test(
 mediapipe_proto_library(
     name = "mask_overlay_calculator_proto",
     srcs = ["mask_overlay_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -534,7 +504,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "opencv_encoded_image_to_image_frame_calculator_proto",
     srcs = ["opencv_encoded_image_to_image_frame_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -544,7 +513,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "feature_detector_calculator_proto",
     srcs = ["feature_detector_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -554,7 +522,6 @@ mediapipe_proto_library(
 cc_library(
     name = "mask_overlay_calculator",
     srcs = ["mask_overlay_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":mask_overlay_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -570,7 +537,6 @@ cc_library(
 cc_library(
     name = "feature_detector_calculator",
     srcs = ["feature_detector_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":feature_detector_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -597,7 +563,6 @@ cc_library(
 cc_library(
     name = "image_file_properties_calculator",
     srcs = ["image_file_properties_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/formats:image_file_properties_cc_proto",
@@ -627,11 +592,10 @@ cc_test(
 cc_library(
     name = "segmentation_smoothing_calculator",
     srcs = ["segmentation_smoothing_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":segmentation_smoothing_calculator_cc_proto",
-        "//mediapipe/framework:calculator_options_cc_proto",
         "//mediapipe/framework/formats:image_format_cc_proto",
+        "//mediapipe/framework:calculator_options_cc_proto",
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/formats:image_frame",
         "//mediapipe/framework/formats:image",
@@ -724,7 +688,6 @@ cc_library(
 mediapipe_proto_library(
     name = "warp_affine_calculator_proto",
     srcs = ["warp_affine_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -736,7 +699,6 @@ cc_library(
     name = "warp_affine_calculator",
     srcs = ["warp_affine_calculator.cc"],
     hdrs = ["warp_affine_calculator.h"],
-    visibility = ["//visibility:public"],
     deps = [
         ":affine_transformation",
         ":warp_affine_calculator_cc_proto",
@@ -785,8 +747,8 @@ cc_test(
     tags = ["desktop_only_test"],
     deps = [
         ":affine_transformation",
+        ":image_transformation_calculator",
         ":warp_affine_calculator",
-        "//mediapipe/calculators/image:image_transformation_calculator",
         "//mediapipe/calculators/tensor:image_to_tensor_converter",
         "//mediapipe/calculators/tensor:image_to_tensor_utils",
         "//mediapipe/calculators/util:from_image_calculator",
@@ -817,7 +779,6 @@ cc_test(
 cc_library(
     name = "yuv_to_image_calculator",
     srcs = ["yuv_to_image_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_context",
         "//mediapipe/framework:calculator_framework",

mediapipe/calculators/image/affine_transformation_runner_gl.cc

@@ -92,8 +92,8 @@ class GlTextureWarpAffineRunner
 
       constexpr GLchar kVertShader[] = R"(
             in vec4 position;
-            in mediump vec4 texture_coordinate;
+            in highp vec4 texture_coordinate;
-            out mediump vec2 sample_coordinate;
+            out highp vec2 sample_coordinate;
             uniform mat4 transform_matrix;
 
             void main() {
@@ -104,7 +104,7 @@ class GlTextureWarpAffineRunner
           )";
 
       constexpr GLchar kFragShader[] = R"(
-            DEFAULT_PRECISION(mediump, float)
+            DEFAULT_PRECISION(highp, float)
             in vec2 sample_coordinate;
             uniform sampler2D input_texture;
 

mediapipe/calculators/image/color_convert_calculator.cc

@@ -38,6 +38,7 @@ void SetColorChannel(int channel, uint8 value, cv::Mat* mat) {
 
 constexpr char kRgbaInTag[] = "RGBA_IN";
 constexpr char kRgbInTag[] = "RGB_IN";
+constexpr char kBgrInTag[] = "BGR_IN";
 constexpr char kBgraInTag[] = "BGRA_IN";
 constexpr char kGrayInTag[] = "GRAY_IN";
 constexpr char kRgbaOutTag[] = "RGBA_OUT";
@@ -57,6 +58,7 @@ constexpr char kGrayOutTag[] = "GRAY_OUT";
 //   RGB  -> RGBA
 //   RGBA -> BGRA
 //   BGRA -> RGBA
+//   BGR  -> RGB
 //
 // This calculator only supports a single input stream and output stream at a
 // time. If more than one input stream or output stream is present, the
@@ -69,6 +71,7 @@ constexpr char kGrayOutTag[] = "GRAY_OUT";
 //   RGB_IN:        The input video stream (ImageFrame, SRGB).
 //   BGRA_IN:       The input video stream (ImageFrame, SBGRA).
 //   GRAY_IN:       The input video stream (ImageFrame, GRAY8).
+//   BGR_IN:        The input video stream (ImageFrame, SBGR).
 //
 // Output streams:
 //   RGBA_OUT:      The output video stream (ImageFrame, SRGBA).
@@ -122,6 +125,10 @@ absl::Status ColorConvertCalculator::GetContract(CalculatorContract* cc) {
     cc->Inputs().Tag(kBgraInTag).Set<ImageFrame>();
   }
 
+  if (cc->Inputs().HasTag(kBgrInTag)) {
+    cc->Inputs().Tag(kBgrInTag).Set<ImageFrame>();
+  }
+
   if (cc->Outputs().HasTag(kRgbOutTag)) {
     cc->Outputs().Tag(kRgbOutTag).Set<ImageFrame>();
   }
@@ -194,6 +201,11 @@ absl::Status ColorConvertCalculator::Process(CalculatorContext* cc) {
     return ConvertAndOutput(kRgbaInTag, kBgraOutTag, ImageFormat::SBGRA,
                             cv::COLOR_RGBA2BGRA, cc);
   }
+  // BGR -> RGB
+  if (cc->Inputs().HasTag(kBgrInTag) && cc->Outputs().HasTag(kRgbOutTag)) {
+    return ConvertAndOutput(kBgrInTag, kRgbOutTag, ImageFormat::SRGB,
+                            cv::COLOR_BGR2RGB, cc);
+  }
 
   return mediapipe::InvalidArgumentErrorBuilder(MEDIAPIPE_LOC)
          << "Unsupported image format conversion.";

mediapipe/calculators/image/image_cropping_calculator.cc

@@ -37,7 +37,8 @@ enum { ATTRIB_VERTEX, ATTRIB_TEXTURE_POSITION, NUM_ATTRIBUTES };
 namespace mediapipe {
 
 namespace {
-
+using ::mediapipe::NormalizedRect;
+using ::mediapipe::Rect;
 #if !MEDIAPIPE_DISABLE_GPU
 
 #endif  // !MEDIAPIPE_DISABLE_GPU

mediapipe/calculators/image/image_cropping_calculator_test.cc

@@ -195,11 +195,11 @@ TEST(ImageCroppingCalculatorTest, RedundantSpecWithInputStream) {
   auto cc = absl::make_unique<CalculatorContext>(
       calculator_state.get(), inputTags, tool::CreateTagMap({}).value());
   auto& inputs = cc->Inputs();
-  mediapipe::Rect rect = ParseTextProtoOrDie<mediapipe::Rect>(
+  Rect rect = ParseTextProtoOrDie<Rect>(
       R"pb(
         width: 1 height: 1 x_center: 40 y_center: 40 rotation: 0.5
       )pb");
-  inputs.Tag(kRectTag).Value() = MakePacket<mediapipe::Rect>(rect);
+  inputs.Tag(kRectTag).Value() = MakePacket<Rect>(rect);
   RectSpec expectRect = {
       .width = 1,
       .height = 1,

mediapipe/calculators/image/scale_image_utils.cc

@@ -142,6 +142,9 @@ absl::Status FindOutputDimensions(int input_width,             //
                                       static_cast<double>(input_height));
     try_width = (try_width / 2) * 2;
     try_height = (try_height / 2) * 2;
+    // The output width/height should be greater than 0.
+    try_width = std::max(try_width, 1);
+    try_height = std::max(try_height, 1);
 
     if (target_height <= 0 || try_height <= target_height) {
       // The resulting height based on the target width and aspect ratio
@@ -160,6 +163,9 @@ absl::Status FindOutputDimensions(int input_width,             //
                                      static_cast<double>(input_width));
     try_width = (try_width / 2) * 2;
     try_height = (try_height / 2) * 2;
+    // The output width/height should be greater than 0.
+    try_width = std::max(try_width, 1);
+    try_height = std::max(try_height, 1);
 
     if (target_width <= 0 || try_width <= target_width) {
       // The resulting width based on the target width and aspect ratio

mediapipe/calculators/image/scale_image_utils_test.cc

@@ -124,6 +124,16 @@ TEST(ScaleImageUtilsTest, FindOutputDimensionsPreserveRatio) {
                                     &output_width, &output_height));
   EXPECT_EQ(151, output_width);
   EXPECT_EQ(101, output_height);
+  // Scale to height 1.
+  MP_ASSERT_OK(FindOutputDimensions(10000, 10, 100, 0, 0, true, 2,
+                                    &output_width, &output_height));
+  EXPECT_EQ(100, output_width);
+  EXPECT_EQ(1, output_height);
+  // Scale to width 1.
+  MP_ASSERT_OK(FindOutputDimensions(10, 10000, 0, 100, 0, true, 2,
+                                    &output_width, &output_height));
+  EXPECT_EQ(1, output_width);
+  EXPECT_EQ(100, output_height);
 }
 
 // Tests scaling without keeping the aspect ratio fixed.

mediapipe/calculators/internal/BUILD

@@ -12,16 +12,16 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-licenses(["notice"])
-
 load("//mediapipe/framework/port:build_config.bzl", "mediapipe_cc_proto_library")
 
+licenses(["notice"])
+
 package(default_visibility = ["//visibility:private"])
 
 proto_library(
     name = "callback_packet_calculator_proto",
     srcs = ["callback_packet_calculator.proto"],
-    visibility = ["//visibility:public"],
+    visibility = ["//mediapipe/framework:__subpackages__"],
     deps = ["//mediapipe/framework:calculator_proto"],
 )
 
@@ -29,14 +29,14 @@ mediapipe_cc_proto_library(
     name = "callback_packet_calculator_cc_proto",
     srcs = ["callback_packet_calculator.proto"],
     cc_deps = ["//mediapipe/framework:calculator_cc_proto"],
-    visibility = ["//visibility:public"],
+    visibility = ["//mediapipe/framework:__subpackages__"],
     deps = [":callback_packet_calculator_proto"],
 )
 
 cc_library(
     name = "callback_packet_calculator",
     srcs = ["callback_packet_calculator.cc"],
-    visibility = ["//visibility:public"],
+    visibility = ["//mediapipe/framework:__subpackages__"],
     deps = [
         ":callback_packet_calculator_cc_proto",
         "//mediapipe/framework:calculator_base",

mediapipe/calculators/tensor/BUILD

@@ -24,12 +24,13 @@ load("//mediapipe/framework:encode_binary_proto.bzl", "encode_binary_proto")
 
 licenses(["notice"])
 
-package(default_visibility = ["//visibility:private"])
+package(default_visibility = ["//visibility:public"])
 
 exports_files(
     glob(["testdata/image_to_tensor/*"]),
     visibility = [
         "//mediapipe/calculators/image:__subpackages__",
+        "//mediapipe/util:__subpackages__",
     ],
 )
 
@@ -43,9 +44,6 @@ selects.config_setting_group(
 mediapipe_proto_library(
     name = "audio_to_tensor_calculator_proto",
     srcs = ["audio_to_tensor_calculator.proto"],
-    visibility = [
-        "//mediapipe/framework:mediapipe_internal",
-    ],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -55,17 +53,6 @@ mediapipe_proto_library(
 cc_library(
     name = "audio_to_tensor_calculator",
     srcs = ["audio_to_tensor_calculator.cc"],
-    copts = select({
-        # b/215212850
-        "//mediapipe:apple": [
-            "-x objective-c++",
-            "-fobjc-arc",
-        ],
-        "//conditions:default": [],
-    }),
-    visibility = [
-        "//mediapipe/framework:mediapipe_internal",
-    ],
     deps = [
         ":audio_to_tensor_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -112,9 +99,6 @@ cc_test(
 mediapipe_proto_library(
     name = "tensors_to_audio_calculator_proto",
     srcs = ["tensors_to_audio_calculator.proto"],
-    visibility = [
-        "//mediapipe/framework:mediapipe_internal",
-    ],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -124,9 +108,6 @@ mediapipe_proto_library(
 cc_library(
     name = "tensors_to_audio_calculator",
     srcs = ["tensors_to_audio_calculator.cc"],
-    visibility = [
-        "//mediapipe/framework:mediapipe_internal",
-    ],
     deps = [
         ":tensors_to_audio_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -163,9 +144,6 @@ cc_test(
 mediapipe_proto_library(
     name = "feedback_tensors_calculator_proto",
     srcs = ["feedback_tensors_calculator.proto"],
-    visibility = [
-        "//mediapipe/framework:mediapipe_internal",
-    ],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -175,17 +153,6 @@ mediapipe_proto_library(
 cc_library(
     name = "feedback_tensors_calculator",
     srcs = ["feedback_tensors_calculator.cc"],
-    copts = select({
-        # b/215212850
-        "//mediapipe:apple": [
-            "-x objective-c++",
-            "-fobjc-arc",
-        ],
-        "//conditions:default": [],
-    }),
-    visibility = [
-        "//mediapipe/framework:mediapipe_internal",
-    ],
     deps = [
         ":feedback_tensors_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -215,9 +182,6 @@ cc_test(
 mediapipe_proto_library(
     name = "bert_preprocessor_calculator_proto",
     srcs = ["bert_preprocessor_calculator.proto"],
-    visibility = [
-        "//mediapipe/framework:mediapipe_internal",
-    ],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -227,9 +191,6 @@ mediapipe_proto_library(
 cc_library(
     name = "bert_preprocessor_calculator",
     srcs = ["bert_preprocessor_calculator.cc"],
-    visibility = [
-        "//mediapipe/framework:mediapipe_internal",
-    ],
     deps = [
         ":bert_preprocessor_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -273,9 +234,6 @@ cc_test(
 mediapipe_proto_library(
     name = "regex_preprocessor_calculator_proto",
     srcs = ["regex_preprocessor_calculator.proto"],
-    visibility = [
-        "//mediapipe/framework:mediapipe_internal",
-    ],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -285,9 +243,6 @@ mediapipe_proto_library(
 cc_library(
     name = "regex_preprocessor_calculator",
     srcs = ["regex_preprocessor_calculator.cc"],
-    visibility = [
-        "//mediapipe/framework:mediapipe_internal",
-    ],
     deps = [
         ":regex_preprocessor_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -329,9 +284,6 @@ cc_test(
 cc_library(
     name = "text_to_tensor_calculator",
     srcs = ["text_to_tensor_calculator.cc"],
-    visibility = [
-        "//mediapipe/framework:mediapipe_internal",
-    ],
     deps = [
         "//mediapipe/framework:calculator_context",
         "//mediapipe/framework:calculator_framework",
@@ -404,7 +356,6 @@ cc_test(
 mediapipe_proto_library(
     name = "inference_calculator_proto",
     srcs = ["inference_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -423,16 +374,8 @@ cc_library(
     name = "inference_calculator_interface",
     srcs = ["inference_calculator.cc"],
     hdrs = ["inference_calculator.h"],
-    copts = select({
-        # TODO: fix tensor.h not to require this, if possible
-        "//mediapipe:apple": [
-            "-x objective-c++",
-            "-fobjc-arc",  # enable reference-counting
-        ],
-        "//conditions:default": [],
-    }),
-    visibility = ["//visibility:public"],
     deps = [
+        ":inference_calculator_cc_proto",
         ":inference_calculator_options_lib",
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/api2:node",
@@ -455,7 +398,6 @@ cc_library(
     name = "inference_calculator_gl",
     srcs = ["inference_calculator_gl.cc"],
     tags = ["nomac"],  # config problem with cpuinfo via TF
-    visibility = ["//visibility:public"],
     deps = [
         ":inference_calculator_cc_proto",
         ":inference_calculator_interface",
@@ -463,6 +405,7 @@ cc_library(
         "//mediapipe/gpu:gl_calculator_helper",
         "@com_google_absl//absl/memory",
         "@com_google_absl//absl/status",
+        "@com_google_absl//absl/strings:str_format",
         "@org_tensorflow//tensorflow/lite/delegates/gpu:gl_delegate",
     ],
     alwayslink = 1,
@@ -472,7 +415,6 @@ cc_library(
     name = "inference_calculator_gl_advanced",
     srcs = ["inference_calculator_gl_advanced.cc"],
     tags = ["nomac"],
-    visibility = ["//visibility:public"],
     deps = [
         ":inference_calculator_interface",
         "@com_google_absl//absl/memory",
@@ -503,15 +445,16 @@ cc_library(
         "-framework MetalKit",
     ],
     tags = ["ios"],
-    visibility = ["//visibility:public"],
     deps = [
         "inference_calculator_interface",
+        "//mediapipe/framework/formats:tensor",
         "//mediapipe/gpu:MPPMetalHelper",
         "//mediapipe/gpu:MPPMetalUtil",
         "//mediapipe/gpu:gpu_buffer",
         "//mediapipe/objc:mediapipe_framework_ios",
         "//mediapipe/util/tflite:config",
         "@com_google_absl//absl/memory",
+        "@com_google_absl//absl/strings:str_format",
         "@org_tensorflow//tensorflow/lite/delegates/gpu:metal_delegate",
         "@org_tensorflow//tensorflow/lite/delegates/gpu:metal_delegate_internal",
         "@org_tensorflow//tensorflow/lite/delegates/gpu/common:shape",
@@ -523,15 +466,6 @@ cc_library(
 cc_library(
     name = "inference_runner",
     hdrs = ["inference_runner.h"],
-    copts = select({
-        # TODO: fix tensor.h not to require this, if possible
-        "//mediapipe:apple": [
-            "-x objective-c++",
-            "-fobjc-arc",  # enable reference-counting
-        ],
-        "//conditions:default": [],
-    }),
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_context",
         "//mediapipe/framework/formats:tensor",
@@ -543,15 +477,6 @@ cc_library(
     name = "inference_interpreter_delegate_runner",
     srcs = ["inference_interpreter_delegate_runner.cc"],
     hdrs = ["inference_interpreter_delegate_runner.h"],
-    copts = select({
-        # TODO: fix tensor.h not to require this, if possible
-        "//mediapipe:apple": [
-            "-x objective-c++",
-            "-fobjc-arc",  # enable reference-counting
-        ],
-        "//conditions:default": [],
-    }),
-    visibility = ["//visibility:public"],
     deps = [
         ":inference_runner",
         "//mediapipe/framework:mediapipe_profiling",
@@ -573,15 +498,6 @@ cc_library(
     srcs = [
         "inference_calculator_cpu.cc",
     ],
-    copts = select({
-        # TODO: fix tensor.h not to require this, if possible
-        "//mediapipe:apple": [
-            "-x objective-c++",
-            "-fobjc-arc",  # enable reference-counting
-        ],
-        "//conditions:default": [],
-    }),
-    visibility = ["//visibility:public"],
     deps = [
         ":inference_calculator_interface",
         ":inference_calculator_utils",
@@ -620,15 +536,6 @@ cc_library(
     srcs = [
         "inference_calculator_xnnpack.cc",
     ],
-    copts = select({
-        # TODO: fix tensor.h not to require this, if possible
-        "//mediapipe:apple": [
-            "-x objective-c++",
-            "-fobjc-arc",  # enable reference-counting
-        ],
-        "//conditions:default": [],
-    }),
-    visibility = ["//visibility:public"],
     deps = [
         ":inference_calculator_interface",
         ":inference_calculator_utils",
@@ -644,7 +551,6 @@ cc_library(
 
 cc_library(
     name = "inference_calculator_gl_if_compute_shader_available",
-    visibility = ["//visibility:public"],
     deps = selects.with_or({
         ":compute_shader_unavailable": [],
         "//conditions:default": [
@@ -660,7 +566,6 @@ cc_library(
 # inference_calculator_interface.
 cc_library(
     name = "inference_calculator",
-    visibility = ["//visibility:public"],
     deps = [
         ":inference_calculator_interface",
         ":inference_calculator_cpu",
@@ -674,7 +579,6 @@ cc_library(
 mediapipe_proto_library(
     name = "tensor_converter_calculator_proto",
     srcs = ["tensor_converter_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -699,7 +603,6 @@ cc_library(
         ],
         "//conditions:default": [],
     }),
-    visibility = ["//visibility:public"],
     deps = [
         ":tensor_converter_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -718,6 +621,7 @@ cc_library(
 
 cc_library(
     name = "tensor_converter_calculator_gpu_deps",
+    visibility = ["//visibility:private"],
     deps = select({
         "//mediapipe:android": [
             "//mediapipe/gpu:gl_calculator_helper",
@@ -762,7 +666,6 @@ cc_test(
 mediapipe_proto_library(
     name = "tensors_to_detections_calculator_proto",
     srcs = ["tensors_to_detections_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -787,19 +690,18 @@ cc_library(
         ],
         "//conditions:default": [],
     }),
-    visibility = ["//visibility:public"],
     deps = [
         ":tensors_to_detections_calculator_cc_proto",
         "//mediapipe/framework/formats:detection_cc_proto",
         "@com_google_absl//absl/strings:str_format",
         "@com_google_absl//absl/types:span",
         "//mediapipe/framework/api2:node",
+        "//mediapipe/framework/formats/object_detection:anchor_cc_proto",
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework:port",
         "//mediapipe/framework/deps:file_path",
         "//mediapipe/framework/formats:location",
         "//mediapipe/framework/formats:tensor",
-        "//mediapipe/framework/formats/object_detection:anchor_cc_proto",
         "//mediapipe/framework/port:ret_check",
     ] + selects.with_or({
         ":compute_shader_unavailable": [],
@@ -810,6 +712,7 @@ cc_library(
 
 cc_library(
     name = "tensors_to_detections_calculator_gpu_deps",
+    visibility = ["//visibility:private"],
     deps = select({
         "//mediapipe:ios": [
             "//mediapipe/gpu:MPPMetalUtil",
@@ -825,7 +728,6 @@ cc_library(
 mediapipe_proto_library(
     name = "tensors_to_landmarks_calculator_proto",
     srcs = ["tensors_to_landmarks_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -842,7 +744,6 @@ cc_library(
         ],
         "//conditions:default": [],
     }),
-    visibility = ["//visibility:public"],
     deps = [
         ":tensors_to_landmarks_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -857,7 +758,6 @@ cc_library(
 mediapipe_proto_library(
     name = "landmarks_to_tensor_calculator_proto",
     srcs = ["landmarks_to_tensor_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -875,7 +775,6 @@ cc_library(
         ],
         "//conditions:default": [],
     }),
-    visibility = ["//visibility:public"],
     deps = [
         ":landmarks_to_tensor_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -908,7 +807,6 @@ cc_test(
 mediapipe_proto_library(
     name = "tensors_to_floats_calculator_proto",
     srcs = ["tensors_to_floats_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -925,7 +823,6 @@ cc_library(
         ],
         "//conditions:default": [],
     }),
-    visibility = ["//visibility:public"],
     deps = [
         ":tensors_to_floats_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -963,7 +860,6 @@ cc_library(
         ],
         "//conditions:default": [],
     }),
-    visibility = ["//visibility:public"],
     deps = [
         ":tensors_to_classification_calculator_cc_proto",
         "@com_google_absl//absl/container:node_hash_map",
@@ -994,7 +890,6 @@ cc_library(
 mediapipe_proto_library(
     name = "tensors_to_classification_calculator_proto",
     srcs = ["tensors_to_classification_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -1032,7 +927,6 @@ cc_library(
         "//conditions:default": [],
     }),
     features = ["-layering_check"],  # allow depending on image_to_tensor_calculator_gpu_deps
-    visibility = ["//visibility:public"],
     deps = [
         ":image_to_tensor_calculator_cc_proto",
         ":image_to_tensor_converter",
@@ -1061,6 +955,7 @@ cc_library(
 
 cc_library(
     name = "image_to_tensor_calculator_gpu_deps",
+    visibility = ["//visibility:private"],
     deps = selects.with_or({
         "//mediapipe:android": [
             ":image_to_tensor_converter_gl_buffer",
@@ -1084,7 +979,6 @@ cc_library(
 mediapipe_proto_library(
     name = "image_to_tensor_calculator_proto",
     srcs = ["image_to_tensor_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -1130,6 +1024,7 @@ cc_test(
         "//mediapipe/framework/port:opencv_imgcodecs",
         "//mediapipe/framework/port:opencv_imgproc",
         "//mediapipe/framework/port:parse_text_proto",
+        "//mediapipe/util:image_test_utils",
         "@com_google_absl//absl/flags:flag",
         "@com_google_absl//absl/memory",
         "@com_google_absl//absl/strings",
@@ -1146,7 +1041,6 @@ cc_library(
         ],
         "//conditions:default": [],
     }),
-    visibility = ["//visibility:public"],
     deps = [
         ":image_to_tensor_utils",
         "//mediapipe/framework/formats:image",
@@ -1166,7 +1060,6 @@ cc_library(
         ],
         "//conditions:default": [],
     }),
-    visibility = ["//visibility:public"],
     deps = [
         ":image_to_tensor_converter",
         ":image_to_tensor_utils",
@@ -1186,6 +1079,7 @@ cc_library(
     name = "image_to_tensor_converter_gl_buffer",
     srcs = ["image_to_tensor_converter_gl_buffer.cc"],
     hdrs = ["image_to_tensor_converter_gl_buffer.h"],
+    visibility = ["//visibility:private"],
     deps = ["//mediapipe/framework:port"] + selects.with_or({
         "//mediapipe:apple": [],
         "//conditions:default": [
@@ -1219,6 +1113,7 @@ cc_library(
     name = "image_to_tensor_converter_gl_texture",
     srcs = ["image_to_tensor_converter_gl_texture.cc"],
     hdrs = ["image_to_tensor_converter_gl_texture.h"],
+    visibility = ["//visibility:private"],
     deps = ["//mediapipe/framework:port"] + select({
         "//mediapipe/gpu:disable_gpu": [],
         "//conditions:default": [
@@ -1243,6 +1138,7 @@ cc_library(
     name = "image_to_tensor_converter_gl_utils",
     srcs = ["image_to_tensor_converter_gl_utils.cc"],
     hdrs = ["image_to_tensor_converter_gl_utils.h"],
+    visibility = ["//visibility:private"],
     deps = ["//mediapipe/framework:port"] + select({
         "//mediapipe/gpu:disable_gpu": [],
         "//conditions:default": [
@@ -1272,6 +1168,7 @@ cc_library(
         ],
         "//conditions:default": [],
     }),
+    visibility = ["//visibility:private"],
     deps = ["//mediapipe/framework:port"] + select({
         "//mediapipe:apple": [
             ":image_to_tensor_converter",
@@ -1279,7 +1176,6 @@ cc_library(
             "//mediapipe/gpu:MPPMetalHelper",
             "@com_google_absl//absl/strings",
             "//mediapipe/framework:calculator_framework",
-            "//mediapipe/framework/formats:rect_cc_proto",
             "//mediapipe/framework/formats:tensor",
             "//mediapipe/framework/port:ret_check",
             "//mediapipe/framework/port:status",
@@ -1304,7 +1200,6 @@ cc_library(
         ],
         "//conditions:default": [],
     }),
-    visibility = ["//visibility:public"],
     deps = [
         ":image_to_tensor_calculator_cc_proto",
         "@com_google_absl//absl/status",
@@ -1347,7 +1242,6 @@ selects.config_setting_group(
 mediapipe_proto_library(
     name = "tensors_to_segmentation_calculator_proto",
     srcs = ["tensors_to_segmentation_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -1365,7 +1259,6 @@ cc_library(
         ],
         "//conditions:default": [],
     }),
-    visibility = ["//visibility:public"],
     deps = [
         ":tensors_to_segmentation_calculator_cc_proto",
         "@com_google_absl//absl/strings:str_format",
@@ -1378,9 +1271,9 @@ cc_library(
         "//mediapipe/framework:calculator_context",
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework:port",
+        "//mediapipe/gpu:gpu_origin_cc_proto",
         "//mediapipe/util:resource_util",
         "@org_tensorflow//tensorflow/lite:framework",
-        "//mediapipe/gpu:gpu_origin_cc_proto",
         "//mediapipe/framework/port:statusor",
     ] + selects.with_or({
         "//mediapipe/gpu:disable_gpu": [],
@@ -1423,7 +1316,6 @@ cc_library(
         ],
         "//conditions:default": [],
     }),
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_context",
         "//mediapipe/framework:calculator_framework",

mediapipe/calculators/tensor/audio_to_tensor_calculator.cc

@@ -43,6 +43,7 @@ namespace api2 {
 namespace {
 
 using Options = ::mediapipe::AudioToTensorCalculatorOptions;
+using DftTensorFormat = Options::DftTensorFormat;
 using FlushMode = Options::FlushMode;
 
 std::vector<float> HannWindow(int window_size, bool sqrt_hann) {
@@ -188,6 +189,8 @@ class AudioToTensorCalculator : public Node {
   int padding_samples_before_;
   int padding_samples_after_;
   FlushMode flush_mode_;
+  DftTensorFormat dft_tensor_format_;
+
   Timestamp initial_timestamp_ = Timestamp::Unstarted();
   int64 cumulative_input_samples_ = 0;
   Timestamp next_output_timestamp_ = Timestamp::Unstarted();
@@ -273,6 +276,7 @@ absl::Status AudioToTensorCalculator::Open(CalculatorContext* cc) {
   }
   padding_samples_before_ = options.padding_samples_before();
   padding_samples_after_ = options.padding_samples_after();
+  dft_tensor_format_ = options.dft_tensor_format();
   flush_mode_ = options.flush_mode();
 
   RET_CHECK(kAudioSampleRateIn(cc).IsConnected() ^
@@ -492,14 +496,43 @@ absl::Status AudioToTensorCalculator::OutputTensor(const Matrix& block,
       kDcAndNyquistOut(cc).Send(std::make_pair(fft_output_[0], fft_output_[1]),
                                 timestamp);
     }
-    Matrix fft_output_matrix =
+    switch (dft_tensor_format_) {
-        Eigen::Map<const Matrix>(fft_output_.data() + 2, 1, fft_size_ - 2);
+      case Options::WITH_NYQUIST: {
-    fft_output_matrix.conservativeResize(Eigen::NoChange, fft_size_);
+        Matrix fft_output_matrix =
-    // The last two elements are the DFT Nyquist values.
+            Eigen::Map<const Matrix>(fft_output_.data() + 2, 1, fft_size_ - 2);
-    fft_output_matrix(fft_size_ - 2) = fft_output_[1];  // Nyquist real part
+        fft_output_matrix.conservativeResize(Eigen::NoChange, fft_size_);
-    fft_output_matrix(fft_size_ - 1) = 0.0f;            // Nyquist imagery part
+        // The last two elements are Nyquist component.
-    ASSIGN_OR_RETURN(output_tensor,
+        fft_output_matrix(fft_size_ - 2) = fft_output_[1];  // Nyquist real part
-                     ConvertToTensor(fft_output_matrix, {2, fft_size_ / 2}));
+        fft_output_matrix(fft_size_ - 1) = 0.0f;  // Nyquist imagery part
+        ASSIGN_OR_RETURN(output_tensor, ConvertToTensor(fft_output_matrix,
+                                                        {2, fft_size_ / 2}));
+        break;
+      }
+      case Options::WITH_DC_AND_NYQUIST: {
+        Matrix fft_output_matrix =
+            Eigen::Map<const Matrix>(fft_output_.data(), 1, fft_size_);
+        fft_output_matrix.conservativeResize(Eigen::NoChange, fft_size_ + 2);
+        fft_output_matrix(1) = 0.0f;  // DC imagery part.
+        // The last two elements are  Nyquist component.
+        fft_output_matrix(fft_size_) = fft_output_[1];  // Nyquist real part
+        fft_output_matrix(fft_size_ + 1) = 0.0f;        // Nyquist imagery part
+        ASSIGN_OR_RETURN(
+            output_tensor,
+            ConvertToTensor(fft_output_matrix, {2, (fft_size_ + 2) / 2}));
+        break;
+      }
+      case Options::WITHOUT_DC_AND_NYQUIST: {
+        Matrix fft_output_matrix =
+            Eigen::Map<const Matrix>(fft_output_.data() + 2, 1, fft_size_ - 2);
+        ASSIGN_OR_RETURN(
+            output_tensor,
+            ConvertToTensor(fft_output_matrix, {2, (fft_size_ - 2) / 2}));
+        break;
+      }
+      default:
+        return absl::InvalidArgumentError("Unsupported dft tensor format.");
+    }
+
   } else {
     ASSIGN_OR_RETURN(output_tensor,
                      ConvertToTensor(block, {num_channels_, num_samples_}));

mediapipe/calculators/tensor/audio_to_tensor_calculator.proto

@@ -68,4 +68,17 @@ message AudioToTensorCalculatorOptions {
   }
 
   optional FlushMode flush_mode = 10 [default = ENTIRE_TAIL_AT_TIMESTAMP_MAX];
+
+  enum DftTensorFormat {
+    DFT_TENSOR_FORMAT_UNKNOWN = 0;
+    // The output dft tensor without dc and nyquist components.
+    WITHOUT_DC_AND_NYQUIST = 1;
+    // The output dft tensor contains the nyquist component as the last
+    // two values.
+    WITH_NYQUIST = 2;
+    // The output dft tensor contains the dc component as the first two values
+    // and the nyquist component as the last two values.
+    WITH_DC_AND_NYQUIST = 3;
+  }
+  optional DftTensorFormat dft_tensor_format = 11 [default = WITH_NYQUIST];
 }

mediapipe/calculators/tensor/image_to_tensor_calculator_test.cc

@@ -36,22 +36,17 @@
 #include "mediapipe/framework/port/opencv_imgproc_inc.h"
 #include "mediapipe/framework/port/parse_text_proto.h"
 #include "mediapipe/framework/port/status_matchers.h"
+#include "mediapipe/util/image_test_utils.h"
 
 namespace mediapipe {
 namespace {
 
-cv::Mat GetRgb(absl::string_view path) {
+constexpr char kTestDataDir[] =
-  cv::Mat bgr = cv::imread(file::JoinPath("./", path));
+    "/mediapipe/calculators/tensor/testdata/"
-  cv::Mat rgb;
+    "image_to_tensor/";
-  cv::cvtColor(bgr, rgb, cv::COLOR_BGR2RGB);
-  return rgb;
-}
 
-cv::Mat GetRgba(absl::string_view path) {
+std::string GetFilePath(absl::string_view filename) {
-  cv::Mat bgr = cv::imread(file::JoinPath("./", path));
+  return file::JoinPath("./", kTestDataDir, filename);
-  cv::Mat rgb;
-  cv::cvtColor(bgr, rgb, cv::COLOR_BGR2RGBA);
-  return rgb;
 }
 
 // Image to tensor test template.
@@ -147,29 +142,34 @@ void RunTestWithInputImagePacket(const Packet& input_image_packet,
   ASSERT_THAT(tensor_vec, testing::SizeIs(1));
 
   const Tensor& tensor = tensor_vec[0];
+  const int channels = tensor.shape().dims[3];
+  ASSERT_TRUE(channels == 1 || channels == 3);
   auto view = tensor.GetCpuReadView();
   cv::Mat tensor_mat;
   if (output_int_tensor) {
     if (range_min < 0) {
       EXPECT_EQ(tensor.element_type(), Tensor::ElementType::kInt8);
-      tensor_mat = cv::Mat(tensor_height, tensor_width, CV_8SC3,
+      tensor_mat = cv::Mat(tensor_height, tensor_width,
+                           channels == 1 ? CV_8SC1 : CV_8SC3,
                            const_cast<int8*>(view.buffer<int8>()));
     } else {
       EXPECT_EQ(tensor.element_type(), Tensor::ElementType::kUInt8);
-      tensor_mat = cv::Mat(tensor_height, tensor_width, CV_8UC3,
+      tensor_mat = cv::Mat(tensor_height, tensor_width,
+                           channels == 1 ? CV_8UC1 : CV_8UC3,
                            const_cast<uint8*>(view.buffer<uint8>()));
     }
   } else {
     EXPECT_EQ(tensor.element_type(), Tensor::ElementType::kFloat32);
-    tensor_mat = cv::Mat(tensor_height, tensor_width, CV_32FC3,
+    tensor_mat = cv::Mat(tensor_height, tensor_width,
+                         channels == 1 ? CV_32FC1 : CV_32FC3,
                          const_cast<float*>(view.buffer<float>()));
   }
 
   cv::Mat result_rgb;
   auto transformation =
       GetValueRangeTransformation(range_min, range_max, 0.0f, 255.0f).value();
-  tensor_mat.convertTo(result_rgb, CV_8UC3, transformation.scale,
+  tensor_mat.convertTo(result_rgb, channels == 1 ? CV_8UC1 : CV_8UC3,
-                       transformation.offset);
+                       transformation.scale, transformation.offset);
 
   cv::Mat diff;
   cv::absdiff(result_rgb, expected_result, diff);
@@ -185,17 +185,27 @@ void RunTestWithInputImagePacket(const Packet& input_image_packet,
   MP_ASSERT_OK(graph.WaitUntilDone());
 }
 
+mediapipe::ImageFormat::Format GetImageFormat(int image_channels) {
+  if (image_channels == 4) {
+    return ImageFormat::SRGBA;
+  } else if (image_channels == 3) {
+    return ImageFormat::SRGB;
+  } else if (image_channels == 1) {
+    return ImageFormat::GRAY8;
+  }
+  CHECK(false) << "Unsupported input image channles: " << image_channels;
+}
+
 Packet MakeImageFramePacket(cv::Mat input) {
-  ImageFrame input_image(
+  ImageFrame input_image(GetImageFormat(input.channels()), input.cols,
-      input.channels() == 4 ? ImageFormat::SRGBA : ImageFormat::SRGB,
+                         input.rows, input.step, input.data, [](uint8*) {});
-      input.cols, input.rows, input.step, input.data, [](uint8*) {});
   return MakePacket<ImageFrame>(std::move(input_image)).At(Timestamp(0));
 }
 
 Packet MakeImagePacket(cv::Mat input) {
   mediapipe::Image input_image(std::make_shared<mediapipe::ImageFrame>(
-      input.channels() == 4 ? ImageFormat::SRGBA : ImageFormat::SRGB,
+      GetImageFormat(input.channels()), input.cols, input.rows, input.step,
-      input.cols, input.rows, input.step, input.data, [](uint8*) {}));
+      input.data, [](uint8*) {}));
   return MakePacket<mediapipe::Image>(std::move(input_image)).At(Timestamp(0));
 }
 
@@ -237,15 +247,12 @@ TEST(ImageToTensorCalculatorTest, MediumSubRectKeepAspect) {
   roi.set_width(0.5f);
   roi.set_height(0.5f);
   roi.set_rotation(0);
-  RunTest(
+  RunTest(GetRgb(GetFilePath("input.jpg")),
-      GetRgb("/mediapipe/calculators/"
+          GetRgb(GetFilePath("medium_sub_rect_keep_aspect.png")),
-             "tensor/testdata/image_to_tensor/input.jpg"),
+          /*float_ranges=*/{{0.0f, 1.0f}},
-      GetRgb("/mediapipe/calculators/"
+          /*int_ranges=*/{{0, 255}, {-128, 127}},
-             "tensor/testdata/image_to_tensor/medium_sub_rect_keep_aspect.png"),
+          /*tensor_width=*/256, /*tensor_height=*/256, /*keep_aspect=*/true,
-      /*float_ranges=*/{{0.0f, 1.0f}},
+          /*border mode*/ {}, roi);
-      /*int_ranges=*/{{0, 255}, {-128, 127}},
-      /*tensor_width=*/256, /*tensor_height=*/256, /*keep_aspect=*/true,
-      /*border mode*/ {}, roi);
 }
 
 TEST(ImageToTensorCalculatorTest, MediumSubRectKeepAspectBorderZero) {
@@ -255,11 +262,8 @@ TEST(ImageToTensorCalculatorTest, MediumSubRectKeepAspectBorderZero) {
   roi.set_width(0.5f);
   roi.set_height(0.5f);
   roi.set_rotation(0);
-  RunTest(GetRgb("/mediapipe/calculators/"
+  RunTest(GetRgb(GetFilePath("input.jpg")),
-                 "tensor/testdata/image_to_tensor/input.jpg"),
+          GetRgb(GetFilePath("medium_sub_rect_keep_aspect_border_zero.png")),
-          GetRgb("/mediapipe/calculators/"
-                 "tensor/testdata/image_to_tensor/"
-                 "medium_sub_rect_keep_aspect_border_zero.png"),
           /*float_ranges=*/{{0.0f, 1.0f}},
           /*int_ranges=*/{{0, 255}, {-128, 127}},
           /*tensor_width=*/256, /*tensor_height=*/256, /*keep_aspect=*/true,
@@ -273,11 +277,8 @@ TEST(ImageToTensorCalculatorTest, MediumSubRectKeepAspectWithRotation) {
   roi.set_width(0.5f);
   roi.set_height(0.5f);
   roi.set_rotation(M_PI * 90.0f / 180.0f);
-  RunTest(GetRgb("/mediapipe/calculators/"
+  RunTest(GetRgb(GetFilePath("input.jpg")),
-                 "tensor/testdata/image_to_tensor/input.jpg"),
+          GetRgb(GetFilePath("medium_sub_rect_keep_aspect_with_rotation.png")),
-          GetRgb("/mediapipe/calculators/"
-                 "tensor/testdata/image_to_tensor/"
-                 "medium_sub_rect_keep_aspect_with_rotation.png"),
           /*float_ranges=*/{{0.0f, 1.0f}},
           /*int_ranges=*/{{0, 255}},
           /*tensor_width=*/256, /*tensor_height=*/256, /*keep_aspect=*/true,
@@ -292,11 +293,9 @@ TEST(ImageToTensorCalculatorTest,
   roi.set_width(0.5f);
   roi.set_height(0.5f);
   roi.set_rotation(M_PI * 90.0f / 180.0f);
-  RunTest(GetRgb("/mediapipe/calculators/"
+  RunTest(GetRgb(GetFilePath("input.jpg")),
-                 "tensor/testdata/image_to_tensor/input.jpg"),
+          GetRgb(GetFilePath(
-          GetRgb("/mediapipe/calculators/"
+              "medium_sub_rect_keep_aspect_with_rotation_border_zero.png")),
-                 "tensor/testdata/image_to_tensor/"
-                 "medium_sub_rect_keep_aspect_with_rotation_border_zero.png"),
           /*float_ranges=*/{{0.0f, 1.0f}},
           /*int_ranges=*/{{0, 255}, {-128, 127}},
           /*tensor_width=*/256, /*tensor_height=*/256, /*keep_aspect=*/true,
@@ -310,16 +309,12 @@ TEST(ImageToTensorCalculatorTest, MediumSubRectWithRotation) {
   roi.set_width(0.5f);
   roi.set_height(0.5f);
   roi.set_rotation(M_PI * -45.0f / 180.0f);
-  RunTest(
+  RunTest(GetRgb(GetFilePath("input.jpg")),
-      GetRgb("/mediapipe/calculators/"
+          GetRgb(GetFilePath("medium_sub_rect_with_rotation.png")),
-             "tensor/testdata/image_to_tensor/input.jpg"),
+          /*float_ranges=*/{{-1.0f, 1.0f}},
-      GetRgb(
+          /*int_ranges=*/{{0, 255}, {-128, 127}},
-          "/mediapipe/calculators/"
+          /*tensor_width=*/256, /*tensor_height=*/256, /*keep_aspect=*/false,
-          "tensor/testdata/image_to_tensor/medium_sub_rect_with_rotation.png"),
+          BorderMode::kReplicate, roi);
-      /*float_ranges=*/{{-1.0f, 1.0f}},
-      /*int_ranges=*/{{0, 255}, {-128, 127}},
-      /*tensor_width=*/256, /*tensor_height=*/256, /*keep_aspect=*/false,
-      BorderMode::kReplicate, roi);
 }
 
 TEST(ImageToTensorCalculatorTest, MediumSubRectWithRotationBorderZero) {
@@ -329,11 +324,8 @@ TEST(ImageToTensorCalculatorTest, MediumSubRectWithRotationBorderZero) {
   roi.set_width(0.5f);
   roi.set_height(0.5f);
   roi.set_rotation(M_PI * -45.0f / 180.0f);
-  RunTest(GetRgb("/mediapipe/calculators/"
+  RunTest(GetRgb(GetFilePath("input.jpg")),
-                 "tensor/testdata/image_to_tensor/input.jpg"),
+          GetRgb(GetFilePath("medium_sub_rect_with_rotation_border_zero.png")),
-          GetRgb("/mediapipe/calculators/"
-                 "tensor/testdata/image_to_tensor/"
-                 "medium_sub_rect_with_rotation_border_zero.png"),
           /*float_ranges=*/{{-1.0f, 1.0f}},
           /*int_ranges=*/{{0, 255}, {-128, 127}},
           /*tensor_width=*/256, /*tensor_height=*/256, /*keep_aspect=*/false,
@@ -347,10 +339,8 @@ TEST(ImageToTensorCalculatorTest, LargeSubRect) {
   roi.set_width(1.5f);
   roi.set_height(1.1f);
   roi.set_rotation(0);
-  RunTest(GetRgb("/mediapipe/calculators/"
+  RunTest(GetRgb(GetFilePath("input.jpg")),
-                 "tensor/testdata/image_to_tensor/input.jpg"),
+          GetRgb(GetFilePath("large_sub_rect.png")),
-          GetRgb("/mediapipe/calculators/"
-                 "tensor/testdata/image_to_tensor/large_sub_rect.png"),
           /*float_ranges=*/{{0.0f, 1.0f}},
           /*int_ranges=*/{{0, 255}},
           /*tensor_width=*/128, /*tensor_height=*/128, /*keep_aspect=*/false,
@@ -364,15 +354,12 @@ TEST(ImageToTensorCalculatorTest, LargeSubRectBorderZero) {
   roi.set_width(1.5f);
   roi.set_height(1.1f);
   roi.set_rotation(0);
-  RunTest(
+  RunTest(GetRgb(GetFilePath("input.jpg")),
-      GetRgb("/mediapipe/calculators/"
+          GetRgb(GetFilePath("large_sub_rect_border_zero.png")),
-             "tensor/testdata/image_to_tensor/input.jpg"),
+          /*float_ranges=*/{{0.0f, 1.0f}},
-      GetRgb("/mediapipe/calculators/"
+          /*int_ranges=*/{{0, 255}, {-128, 127}},
-             "tensor/testdata/image_to_tensor/large_sub_rect_border_zero.png"),
+          /*tensor_width=*/128, /*tensor_height=*/128, /*keep_aspect=*/false,
-      /*float_ranges=*/{{0.0f, 1.0f}},
+          BorderMode::kZero, roi);
-      /*int_ranges=*/{{0, 255}, {-128, 127}},
-      /*tensor_width=*/128, /*tensor_height=*/128, /*keep_aspect=*/false,
-      BorderMode::kZero, roi);
 }
 
 TEST(ImageToTensorCalculatorTest, LargeSubRectKeepAspect) {
@@ -382,15 +369,12 @@ TEST(ImageToTensorCalculatorTest, LargeSubRectKeepAspect) {
   roi.set_width(1.5f);
   roi.set_height(1.1f);
   roi.set_rotation(0);
-  RunTest(
+  RunTest(GetRgb(GetFilePath("input.jpg")),
-      GetRgb("/mediapipe/calculators/"
+          GetRgb(GetFilePath("large_sub_rect_keep_aspect.png")),
-             "tensor/testdata/image_to_tensor/input.jpg"),
+          /*float_ranges=*/{{0.0f, 1.0f}},
-      GetRgb("/mediapipe/calculators/"
+          /*int_ranges=*/{{0, 255}, {-128, 127}},
-             "tensor/testdata/image_to_tensor/large_sub_rect_keep_aspect.png"),
+          /*tensor_width=*/128, /*tensor_height=*/128, /*keep_aspect=*/true,
-      /*float_ranges=*/{{0.0f, 1.0f}},
+          BorderMode::kReplicate, roi);
-      /*int_ranges=*/{{0, 255}, {-128, 127}},
-      /*tensor_width=*/128, /*tensor_height=*/128, /*keep_aspect=*/true,
-      BorderMode::kReplicate, roi);
 }
 
 TEST(ImageToTensorCalculatorTest, LargeSubRectKeepAspectBorderZero) {
@@ -400,11 +384,8 @@ TEST(ImageToTensorCalculatorTest, LargeSubRectKeepAspectBorderZero) {
   roi.set_width(1.5f);
   roi.set_height(1.1f);
   roi.set_rotation(0);
-  RunTest(GetRgb("/mediapipe/calculators/"
+  RunTest(GetRgb(GetFilePath("input.jpg")),
-                 "tensor/testdata/image_to_tensor/input.jpg"),
+          GetRgb(GetFilePath("large_sub_rect_keep_aspect_border_zero.png")),
-          GetRgb("/mediapipe/calculators/"
-                 "tensor/testdata/image_to_tensor/"
-                 "large_sub_rect_keep_aspect_border_zero.png"),
           /*float_ranges=*/{{0.0f, 1.0f}},
           /*int_ranges=*/{{0, 255}, {-128, 127}},
           /*tensor_width=*/128, /*tensor_height=*/128, /*keep_aspect=*/true,
@@ -418,11 +399,23 @@ TEST(ImageToTensorCalculatorTest, LargeSubRectKeepAspectWithRotation) {
   roi.set_width(1.5f);
   roi.set_height(1.1f);
   roi.set_rotation(M_PI * -15.0f / 180.0f);
-  RunTest(GetRgba("/mediapipe/calculators/"
+  RunTest(GetRgba(GetFilePath("input.jpg")),
-                  "tensor/testdata/image_to_tensor/input.jpg"),
+          GetRgb(GetFilePath("large_sub_rect_keep_aspect_with_rotation.png")),
-          GetRgb("/mediapipe/calculators/"
+          /*float_ranges=*/{{0.0f, 1.0f}},
-                 "tensor/testdata/image_to_tensor/"
+          /*int_ranges=*/{{0, 255}, {-128, 127}},
-                 "large_sub_rect_keep_aspect_with_rotation.png"),
+          /*tensor_width=*/128, /*tensor_height=*/128, /*keep_aspect=*/true,
+          /*border_mode=*/{}, roi);
+}
+
+TEST(ImageToTensorCalculatorTest, LargeSubRectKeepAspectWithRotationGray) {
+  mediapipe::NormalizedRect roi;
+  roi.set_x_center(0.5f);
+  roi.set_y_center(0.5f);
+  roi.set_width(1.5f);
+  roi.set_height(1.1f);
+  roi.set_rotation(M_PI * -15.0f / 180.0f);
+  RunTest(GetGray(GetFilePath("input.jpg")),
+          GetGray(GetFilePath("large_sub_rect_keep_aspect_with_rotation.png")),
           /*float_ranges=*/{{0.0f, 1.0f}},
           /*int_ranges=*/{{0, 255}, {-128, 127}},
           /*tensor_width=*/128, /*tensor_height=*/128, /*keep_aspect=*/true,
@@ -437,11 +430,26 @@ TEST(ImageToTensorCalculatorTest,
   roi.set_width(1.5f);
   roi.set_height(1.1f);
   roi.set_rotation(M_PI * -15.0f / 180.0f);
-  RunTest(GetRgba("/mediapipe/calculators/"
+  RunTest(GetRgba(GetFilePath("input.jpg")),
-                  "tensor/testdata/image_to_tensor/input.jpg"),
+          GetRgb(GetFilePath(
-          GetRgb("/mediapipe/calculators/"
+              "large_sub_rect_keep_aspect_with_rotation_border_zero.png")),
-                 "tensor/testdata/image_to_tensor/"
+          /*float_ranges=*/{{0.0f, 1.0f}},
-                 "large_sub_rect_keep_aspect_with_rotation_border_zero.png"),
+          /*int_ranges=*/{{0, 255}},
+          /*tensor_width=*/128, /*tensor_height=*/128, /*keep_aspect=*/true,
+          /*border_mode=*/BorderMode::kZero, roi);
+}
+
+TEST(ImageToTensorCalculatorTest,
+     LargeSubRectKeepAspectWithRotationBorderZeroGray) {
+  mediapipe::NormalizedRect roi;
+  roi.set_x_center(0.5f);
+  roi.set_y_center(0.5f);
+  roi.set_width(1.5f);
+  roi.set_height(1.1f);
+  roi.set_rotation(M_PI * -15.0f / 180.0f);
+  RunTest(GetGray(GetFilePath("input.jpg")),
+          GetGray(GetFilePath(
+              "large_sub_rect_keep_aspect_with_rotation_border_zero.png")),
           /*float_ranges=*/{{0.0f, 1.0f}},
           /*int_ranges=*/{{0, 255}},
           /*tensor_width=*/128, /*tensor_height=*/128, /*keep_aspect=*/true,
@@ -455,10 +463,8 @@ TEST(ImageToTensorCalculatorTest, NoOpExceptRange) {
   roi.set_width(1.0f);
   roi.set_height(1.0f);
   roi.set_rotation(0);
-  RunTest(GetRgba("/mediapipe/calculators/"
+  RunTest(GetRgba(GetFilePath("input.jpg")),
-                  "tensor/testdata/image_to_tensor/input.jpg"),
+          GetRgb(GetFilePath("noop_except_range.png")),
-          GetRgb("/mediapipe/calculators/"
-                 "tensor/testdata/image_to_tensor/noop_except_range.png"),
           /*float_ranges=*/{{0.0f, 1.0f}},
           /*int_ranges=*/{{0, 255}, {-128, 127}},
           /*tensor_width=*/64, /*tensor_height=*/128, /*keep_aspect=*/true,
@@ -472,10 +478,8 @@ TEST(ImageToTensorCalculatorTest, NoOpExceptRangeBorderZero) {
   roi.set_width(1.0f);
   roi.set_height(1.0f);
   roi.set_rotation(0);
-  RunTest(GetRgba("/mediapipe/calculators/"
+  RunTest(GetRgba(GetFilePath("input.jpg")),
-                  "tensor/testdata/image_to_tensor/input.jpg"),
+          GetRgb(GetFilePath("noop_except_range.png")),
-          GetRgb("/mediapipe/calculators/"
-                 "tensor/testdata/image_to_tensor/noop_except_range.png"),
           /*float_ranges=*/{{0.0f, 1.0f}},
           /*int_ranges=*/{{0, 255}, {-128, 127}},
           /*tensor_width=*/64, /*tensor_height=*/128, /*keep_aspect=*/true,

mediapipe/calculators/tensor/image_to_tensor_converter_gl_buffer.cc

@@ -285,7 +285,7 @@ class GlProcessor : public ImageToTensorConverter {
           auto source_texture = gl_helper_.CreateSourceTexture(input);
           tflite::gpu::gl::GlTexture input_texture(
               GL_TEXTURE_2D, source_texture.name(),
-              input_num_channels == 4 ? GL_RGB : GL_RGBA,
+              input_num_channels == 4 ? GL_RGBA : GL_RGB,
               source_texture.width() * source_texture.height() *
                   input_num_channels * sizeof(uint8_t),
               /*layer=*/0,

mediapipe/calculators/tensor/image_to_tensor_converter_gl_texture.cc

@@ -68,8 +68,8 @@ class GlProcessor : public ImageToTensorConverter {
 
       constexpr GLchar kExtractSubRectVertexShader[] = R"(
             in vec4 position;
-            in mediump vec4 texture_coordinate;
+            in highp vec4 texture_coordinate;
-            out mediump vec2 sample_coordinate;
+            out highp vec2 sample_coordinate;
             uniform mat4 transform_matrix;
 
             void main() {
@@ -86,7 +86,7 @@ class GlProcessor : public ImageToTensorConverter {
           )";
 
       constexpr GLchar kExtractSubRectFragBody[] = R"(
-            DEFAULT_PRECISION(mediump, float)
+            DEFAULT_PRECISION(highp, float)
 
             // Provided by kExtractSubRectVertexShader.
             in vec2 sample_coordinate;

mediapipe/calculators/tensor/image_to_tensor_converter_metal.cc

@@ -36,6 +36,10 @@
 #include "tensorflow/lite/delegates/gpu/common/shape.h"
 #include "tensorflow/lite/delegates/gpu/common/types.h"
 
+#if MEDIAPIPE_METAL_ENABLED
+#include "mediapipe/framework/formats/tensor_mtl_buffer_view.h"
+#endif  // MEDIAPIPE_METAL_ENABLED
+
 namespace mediapipe {
 
 namespace {
@@ -376,7 +380,7 @@ class MetalProcessor : public ImageToTensorConverter {
 
       id<MTLCommandBuffer> command_buffer = [metal_helper_ commandBuffer];
       const auto& buffer_view =
-          output_tensor.GetMtlBufferWriteView(command_buffer);
+          MtlBufferView::GetWriteView(output_tensor, command_buffer);
       MP_RETURN_IF_ERROR(extractor_->Execute(
           texture, roi,
           /*flip_horizontaly=*/false, transform.scale, transform.offset,

mediapipe/calculators/tensor/image_to_tensor_converter_opencv.cc

@@ -48,15 +48,19 @@ class OpenCvProcessor : public ImageToTensorConverter {
     switch (tensor_type_) {
       case Tensor::ElementType::kInt8:
         mat_type_ = CV_8SC3;
+        mat_gray_type_ = CV_8SC1;
         break;
       case Tensor::ElementType::kFloat32:
         mat_type_ = CV_32FC3;
+        mat_gray_type_ = CV_32FC1;
         break;
       case Tensor::ElementType::kUInt8:
         mat_type_ = CV_8UC3;
+        mat_gray_type_ = CV_8UC1;
         break;
       default:
         mat_type_ = -1;
+        mat_gray_type_ = -1;
     }
   }
 
@@ -64,36 +68,57 @@ class OpenCvProcessor : public ImageToTensorConverter {
                        float range_min, float range_max,
                        int tensor_buffer_offset,
                        Tensor& output_tensor) override {
-    if (input.image_format() != mediapipe::ImageFormat::SRGB &&
+    const bool is_supported_format =
-        input.image_format() != mediapipe::ImageFormat::SRGBA) {
+        input.image_format() == mediapipe::ImageFormat::SRGB ||
-      return InvalidArgumentError(
+        input.image_format() == mediapipe::ImageFormat::SRGBA ||
-          absl::StrCat("Only RGBA/RGB formats are supported, passed format: ",
+        input.image_format() == mediapipe::ImageFormat::GRAY8;
-                       static_cast<uint32_t>(input.image_format())));
+    if (!is_supported_format) {
+      return InvalidArgumentError(absl::StrCat(
+          "Unsupported format: ", static_cast<uint32_t>(input.image_format())));
     }
-    // TODO: Remove the check once tensor_buffer_offset > 0 is
+
-    // supported.
+    RET_CHECK_GE(tensor_buffer_offset, 0)
-    RET_CHECK_EQ(tensor_buffer_offset, 0)
+        << "The input tensor_buffer_offset needs to be non-negative.";
-        << "The non-zero tensor_buffer_offset input is not supported yet.";
     const auto& output_shape = output_tensor.shape();
     MP_RETURN_IF_ERROR(ValidateTensorShape(output_shape));
 
     const int output_height = output_shape.dims[1];
     const int output_width = output_shape.dims[2];
     const int output_channels = output_shape.dims[3];
+    const int num_elements_per_img =
+        output_height * output_width * output_channels;
     auto buffer_view = output_tensor.GetCpuWriteView();
     cv::Mat dst;
+    const int dst_data_type = output_channels == 1 ? mat_gray_type_ : mat_type_;
     switch (tensor_type_) {
       case Tensor::ElementType::kInt8:
-        dst = cv::Mat(output_height, output_width, mat_type_,
+        RET_CHECK_GE(output_shape.num_elements(),
-                      buffer_view.buffer<int8>());
+                     tensor_buffer_offset / sizeof(int8) + num_elements_per_img)
+            << "The buffer offset + the input image size is larger than the "
+               "allocated tensor buffer.";
+        dst = cv::Mat(
+            output_height, output_width, dst_data_type,
+            buffer_view.buffer<int8>() + tensor_buffer_offset / sizeof(int8));
         break;
       case Tensor::ElementType::kFloat32:
-        dst = cv::Mat(output_height, output_width, mat_type_,
+        RET_CHECK_GE(
-                      buffer_view.buffer<float>());
+            output_shape.num_elements(),
+            tensor_buffer_offset / sizeof(float) + num_elements_per_img)
+            << "The buffer offset + the input image size is larger than the "
+               "allocated tensor buffer.";
+        dst = cv::Mat(
+            output_height, output_width, dst_data_type,
+            buffer_view.buffer<float>() + tensor_buffer_offset / sizeof(float));
         break;
       case Tensor::ElementType::kUInt8:
-        dst = cv::Mat(output_height, output_width, mat_type_,
+        RET_CHECK_GE(
-                      buffer_view.buffer<uint8>());
+            output_shape.num_elements(),
+            tensor_buffer_offset / sizeof(uint8) + num_elements_per_img)
+            << "The buffer offset + the input image size is larger than the "
+               "allocated tensor buffer.";
+        dst = cv::Mat(
+            output_height, output_width, dst_data_type,
+            buffer_view.buffer<uint8>() + tensor_buffer_offset / sizeof(uint8));
         break;
       default:
         return InvalidArgumentError(
@@ -137,7 +162,8 @@ class OpenCvProcessor : public ImageToTensorConverter {
         auto transform,
         GetValueRangeTransformation(kInputImageRangeMin, kInputImageRangeMax,
                                     range_min, range_max));
-    transformed.convertTo(dst, mat_type_, transform.scale, transform.offset);
+    transformed.convertTo(dst, dst_data_type, transform.scale,
+                          transform.offset);
     return absl::OkStatus();
   }
 
@@ -145,10 +171,9 @@ class OpenCvProcessor : public ImageToTensorConverter {
   absl::Status ValidateTensorShape(const Tensor::Shape& output_shape) {
     RET_CHECK_EQ(output_shape.dims.size(), 4)
         << "Wrong output dims size: " << output_shape.dims.size();
-    RET_CHECK_EQ(output_shape.dims[0], 1)
+    RET_CHECK_GE(output_shape.dims[0], 1)
-        << "Handling batch dimension not equal to 1 is not implemented in this "
+        << "The batch dimension needs to be equal or larger than 1.";
-           "converter.";
+    RET_CHECK(output_shape.dims[3] == 3 || output_shape.dims[3] == 1)
-    RET_CHECK_EQ(output_shape.dims[3], 3)
         << "Wrong output channel: " << output_shape.dims[3];
     return absl::OkStatus();
   }
@@ -156,6 +181,7 @@ class OpenCvProcessor : public ImageToTensorConverter {
   enum cv::BorderTypes border_mode_;
   Tensor::ElementType tensor_type_;
   int mat_type_;
+  int mat_gray_type_;
 };
 
 }  // namespace

mediapipe/calculators/tensor/image_to_tensor_utils.cc

@@ -253,7 +253,14 @@ int GetNumOutputChannels(const mediapipe::Image& image) {
   }
 #endif  // MEDIAPIPE_METAL_ENABLED
 #endif  // !MEDIAPIPE_DISABLE_GPU
-  // All of the processors except for Metal expect 3 channels.
+  // TODO: Add a unittest here to test the behavior on GPU, i.e.
+  // failure.
+  // Only output channel == 1 when running on CPU and the input image channel
+  // is 1. Ideally, we want to also support GPU for output channel == 1. But
+  // setting this on the safer side to prevent unintentional failure.
+  if (!image.UsesGpu() && image.channels() == 1) {
+    return 1;
+  }
   return 3;
 }
 

mediapipe/calculators/tensor/inference_calculator.cc

@@ -63,6 +63,10 @@ class InferenceCalculatorSelectorImpl
     for (const auto& suffix : impls) {
       const auto impl = absl::StrCat("InferenceCalculator", suffix);
       if (!mediapipe::CalculatorBaseRegistry::IsRegistered(impl)) continue;
+      VLOG(1) << "Using " << suffix << " for InferenceCalculator with "
+              << (options.has_model_path()
+                      ? "model " + options.model_path()
+                      : "output_stream " + subgraph_node.output_stream(0));
       CalculatorGraphConfig::Node impl_node = subgraph_node;
       impl_node.set_calculator(impl);
       return tool::MakeSingleNodeGraph(std::move(impl_node));

mediapipe/calculators/tensor/inference_calculator.proto

@@ -17,6 +17,7 @@ syntax = "proto2";
 package mediapipe;
 
 import "mediapipe/framework/calculator.proto";
+import "mediapipe/framework/calculator_options.proto";
 
 option java_package = "com.google.mediapipe.calculator.proto";
 option java_outer_classname = "InferenceCalculatorProto";

mediapipe/calculators/tensor/inference_calculator_gl.cc

@@ -20,6 +20,7 @@
 
 #include "absl/memory/memory.h"
 #include "absl/status/status.h"
+#include "absl/strings/str_format.h"
 #include "mediapipe/calculators/tensor/inference_calculator.h"
 #include "mediapipe/calculators/tensor/inference_calculator.pb.h"
 #include "mediapipe/framework/calculator_context.h"
@@ -154,6 +155,10 @@ absl::Status InferenceCalculatorGlImpl::GpuInferenceRunner::LoadDelegate(
   const auto& input_indices = interpreter_->inputs();
   for (int i = 0; i < input_indices.size(); ++i) {
     const TfLiteTensor* tensor = interpreter_->tensor(input_indices[i]);
+    RET_CHECK(tensor->dims->size > 0) << absl::StrFormat(
+        "Input tensor at index [%d] doesn't specify dimensions.",
+        input_indices[i]);
+
     gpu_buffers_in_.emplace_back(absl::make_unique<Tensor>(
         Tensor::ElementType::kFloat32,
         Tensor::Shape{std::vector<int>{
@@ -171,6 +176,9 @@ absl::Status InferenceCalculatorGlImpl::GpuInferenceRunner::LoadDelegate(
   // Create and bind output buffers.
   for (int i = 0; i < output_size_; ++i) {
     const TfLiteTensor* tensor = interpreter_->tensor(output_indices[i]);
+    RET_CHECK(tensor->dims->size > 0) << absl::StrFormat(
+        "Output tensor at index [%d] doesn't specify dimensions.",
+        output_indices[i]);
     gpu_buffers_out_.emplace_back(absl::make_unique<Tensor>(
         Tensor::ElementType::kFloat32,
         Tensor::Shape{std::vector<int>{

mediapipe/calculators/tensor/inference_calculator_gl_advanced.cc

@@ -236,14 +236,21 @@ absl::Status InferenceCalculatorGlAdvancedImpl::OnDiskCacheHelper::Init(
     const mediapipe::InferenceCalculatorOptions& options,
     const mediapipe::InferenceCalculatorOptions::Delegate::Gpu&
         gpu_delegate_options) {
-  use_kernel_caching_ = gpu_delegate_options.has_cached_kernel_path();
+  // The kernel cache needs a unique filename based on either model_path or the
+  // model token, to prevent the cache from being overwritten if the graph has
+  // more than one model.
+  use_kernel_caching_ =
+      gpu_delegate_options.has_cached_kernel_path() &&
+      (options.has_model_path() || gpu_delegate_options.has_model_token());
   use_serialized_model_ = gpu_delegate_options.has_serialized_model_dir() &&
                           gpu_delegate_options.has_model_token();
 
   if (use_kernel_caching_) {
-    cached_kernel_filename_ = gpu_delegate_options.cached_kernel_path() +
+    std::string basename = options.has_model_path()
-                              mediapipe::File::Basename(options.model_path()) +
+                               ? mediapipe::File::Basename(options.model_path())
-                              ".ker";
+                               : gpu_delegate_options.model_token();
+    cached_kernel_filename_ = mediapipe::file::JoinPath(
+        gpu_delegate_options.cached_kernel_path(), basename + ".ker");
   }
   if (use_serialized_model_) {
     serialized_model_path_ =
@@ -258,9 +265,9 @@ InferenceCalculatorGlAdvancedImpl::OnDiskCacheHelper::SaveGpuCaches(
     tflite::gpu::TFLiteGPURunner* gpu_runner) const {
   if (use_kernel_caching_) {
     // Save kernel file.
-    auto kernel_cache = absl::make_unique<std::vector<uint8_t>>(
+    ASSIGN_OR_RETURN(std::vector<uint8_t> kernel_cache,
-        gpu_runner->GetSerializedBinaryCache());
+                     gpu_runner->GetSerializedBinaryCache());
-    std::string cache_str(kernel_cache->begin(), kernel_cache->end());
+    std::string cache_str(kernel_cache.begin(), kernel_cache.end());
     MP_RETURN_IF_ERROR(
         mediapipe::file::SetContents(cached_kernel_filename_, cache_str));
   }

mediapipe/calculators/tensor/inference_calculator_metal.cc

@@ -22,7 +22,10 @@
 #include <vector>
 
 #include "absl/memory/memory.h"
+#include "absl/strings/str_format.h"
 #include "mediapipe/calculators/tensor/inference_calculator.h"
+#include "mediapipe/framework/formats/tensor.h"
+#include "mediapipe/framework/formats/tensor_mtl_buffer_view.h"
 #import "mediapipe/gpu/MPPMetalHelper.h"
 #include "mediapipe/gpu/MPPMetalUtil.h"
 #include "mediapipe/gpu/gpu_buffer.h"
@@ -149,11 +152,12 @@ absl::Status InferenceCalculatorMetalImpl::Process(CalculatorContext* cc) {
   command_buffer.label = @"InferenceCalculator";
   // Explicit copy input with conversion float 32 bits to 16 bits.
   for (int i = 0; i < input_tensors.size(); ++i) {
-    auto input_view = input_tensors[i].GetMtlBufferReadView(command_buffer);
+    auto input_view =
+        MtlBufferView::GetReadView(input_tensors[i], command_buffer);
     // Reshape tensor.
     tflite::gpu::BHWC shape = BhwcFromTensorShape(input_tensors[i].shape());
     auto gpu_buffer_view =
-        gpu_buffers_in_[i]->GetMtlBufferWriteView(command_buffer);
+        MtlBufferView::GetWriteView(*gpu_buffers_in_[i], command_buffer);
     id<MTLComputeCommandEncoder> input_encoder =
         [command_buffer computeCommandEncoder];
     [converter_to_BPHWC4_ convertWithEncoder:input_encoder
@@ -173,9 +177,10 @@ absl::Status InferenceCalculatorMetalImpl::Process(CalculatorContext* cc) {
                                  output_shapes_[i]);
     // Reshape tensor.
     tflite::gpu::BHWC shape = BhwcFromTensorShape(output_shapes_[i]);
-    auto read_view = gpu_buffers_out_[i]->GetMtlBufferReadView(command_buffer);
+    auto read_view =
+        MtlBufferView::GetReadView(*gpu_buffers_out_[i], command_buffer);
     auto write_view =
-        output_tensors->at(i).GetMtlBufferWriteView(command_buffer);
+        MtlBufferView::GetWriteView(output_tensors->at(i), command_buffer);
     id<MTLComputeCommandEncoder> output_encoder =
         [command_buffer computeCommandEncoder];
     [converter_from_BPHWC4_ convertWithEncoder:output_encoder
@@ -245,6 +250,9 @@ absl::Status InferenceCalculatorMetalImpl::CreateConverters(
   const auto& input_indices = interpreter_->inputs();
   for (int i = 0; i < input_indices.size(); ++i) {
     const TfLiteTensor* tensor = interpreter_->tensor(input_indices[i]);
+    RET_CHECK(tensor->dims->size > 0) << absl::StrFormat(
+        "Input tensor at index [%d] doesn't specify dimensions.",
+        input_indices[i]);
     // Create and bind input buffer.
     std::vector<int> dims{tensor->dims->data,
                           tensor->dims->data + tensor->dims->size};
@@ -254,7 +262,7 @@ absl::Status InferenceCalculatorMetalImpl::CreateConverters(
                               : Tensor::ElementType::kFloat32,
         Tensor::Shape{dims}));
     auto buffer_view =
-        gpu_buffers_in_[i]->GetMtlBufferWriteView(gpu_helper_.mtlDevice);
+        MtlBufferView::GetWriteView(*gpu_buffers_in_[i], gpu_helper_.mtlDevice);
     RET_CHECK_EQ(TFLGpuDelegateBindMetalBufferToTensor(
                      delegate_.get(), input_indices[i], buffer_view.buffer()),
                  true);
@@ -266,6 +274,9 @@ absl::Status InferenceCalculatorMetalImpl::CreateConverters(
   output_shapes_.resize(output_indices.size());
   for (int i = 0; i < output_shapes_.size(); ++i) {
     const TfLiteTensor* tensor = interpreter_->tensor(output_indices[i]);
+    RET_CHECK(tensor->dims->size > 0) << absl::StrFormat(
+        "Output tensor at index [%d] doesn't specify dimensions.",
+        output_indices[i]);
     RET_CHECK(tensor->dims->size <= 4);
     // Create and bind output buffers.
     // Channels are always padded to multiple of 4.
@@ -279,8 +290,8 @@ absl::Status InferenceCalculatorMetalImpl::CreateConverters(
         Tensor::Shape{dims}));
     RET_CHECK_EQ(TFLGpuDelegateBindMetalBufferToTensor(
                      delegate_.get(), output_indices[i],
-                     gpu_buffers_out_[i]
+                     MtlBufferView::GetWriteView(*gpu_buffers_out_[i],
-                         ->GetMtlBufferWriteView(gpu_helper_.mtlDevice)
+                                                 gpu_helper_.mtlDevice)
                          .buffer()),
                  true);
   }

mediapipe/calculators/tensor/tensor_converter_calculator.cc

@@ -31,6 +31,7 @@
 #import <Metal/Metal.h>
 #import <MetalKit/MetalKit.h>
 
+#include "mediapipe/framework/formats/tensor_mtl_buffer_view.h"
 #import "mediapipe/gpu/MPPMetalHelper.h"
 #elif MEDIAPIPE_OPENGL_ES_VERSION >= MEDIAPIPE_OPENGL_ES_30
 #include "mediapipe/gpu/gl_calculator_helper.h"
@@ -304,7 +305,7 @@ absl::Status TensorConverterCalculator::ProcessGPU(CalculatorContext* cc) {
   id<MTLTexture> src_texture = [gpu_helper_ metalTextureWithGpuBuffer:input];
   [compute_encoder setTexture:src_texture atIndex:0];
   auto output_view =
-      output_tensors->at(0).GetMtlBufferWriteView(command_buffer);
+      MtlBufferView::GetWriteView(output_tensors->at(0), command_buffer);
   [compute_encoder setBuffer:output_view.buffer() offset:0 atIndex:1];
   MTLSize threads_per_group = MTLSizeMake(kWorkgroupSize, kWorkgroupSize, 1);
   MTLSize threadgroups =

mediapipe/calculators/tensor/tensors_to_detections_calculator.cc

@@ -41,6 +41,7 @@
 #import <Metal/Metal.h>
 #import <MetalKit/MetalKit.h>
 
+#include "mediapipe/framework/formats/tensor_mtl_buffer_view.h"
 #import "mediapipe/gpu/MPPMetalHelper.h"
 #include "mediapipe/gpu/MPPMetalUtil.h"
 #endif  // MEDIAPIPE_METAL_ENABLED
@@ -536,10 +537,11 @@ absl::Status TensorsToDetectionsCalculator::ProcessGPU(
     if (input_tensors.size() == kNumInputTensorsWithAnchors) {
       RET_CHECK_EQ(input_tensors.size(), kNumInputTensorsWithAnchors);
       auto command_buffer = [gpu_helper_ commandBuffer];
-      auto src_buffer = input_tensors[tensor_mapping_.anchors_tensor_index()]
+      auto src_buffer = MtlBufferView::GetReadView(
-                            .GetMtlBufferReadView(command_buffer);
+          input_tensors[tensor_mapping_.anchors_tensor_index()],
+          command_buffer);
       auto dest_buffer =
-          raw_anchors_buffer_->GetMtlBufferWriteView(command_buffer);
+          MtlBufferView::GetWriteView(*raw_anchors_buffer_, command_buffer);
       id<MTLBlitCommandEncoder> blit_command =
           [command_buffer blitCommandEncoder];
       [blit_command copyFromBuffer:src_buffer.buffer()
@@ -571,15 +573,16 @@ absl::Status TensorsToDetectionsCalculator::ProcessGPU(
   [command_encoder setComputePipelineState:decode_program_];
   {
     auto scored_boxes_view =
-        scored_boxes_buffer_->GetMtlBufferWriteView(command_buffer);
+        MtlBufferView::GetWriteView(*scored_boxes_buffer_, command_buffer);
     auto decoded_boxes_view =
-        decoded_boxes_buffer_->GetMtlBufferWriteView(command_buffer);
+        MtlBufferView::GetWriteView(*decoded_boxes_buffer_, command_buffer);
     [command_encoder setBuffer:decoded_boxes_view.buffer() offset:0 atIndex:0];
-    auto input0_view = input_tensors[tensor_mapping_.detections_tensor_index()]
+    auto input0_view = MtlBufferView::GetReadView(
-                           .GetMtlBufferReadView(command_buffer);
+        input_tensors[tensor_mapping_.detections_tensor_index()],
+        command_buffer);
     [command_encoder setBuffer:input0_view.buffer() offset:0 atIndex:1];
     auto raw_anchors_view =
-        raw_anchors_buffer_->GetMtlBufferReadView(command_buffer);
+        MtlBufferView::GetReadView(*raw_anchors_buffer_, command_buffer);
     [command_encoder setBuffer:raw_anchors_view.buffer() offset:0 atIndex:2];
     MTLSize decode_threads_per_group = MTLSizeMake(1, 1, 1);
     MTLSize decode_threadgroups = MTLSizeMake(num_boxes_, 1, 1);
@@ -588,8 +591,8 @@ absl::Status TensorsToDetectionsCalculator::ProcessGPU(
 
     [command_encoder setComputePipelineState:score_program_];
     [command_encoder setBuffer:scored_boxes_view.buffer() offset:0 atIndex:0];
-    auto input1_view = input_tensors[tensor_mapping_.scores_tensor_index()]
+    auto input1_view = MtlBufferView::GetReadView(
-                           .GetMtlBufferReadView(command_buffer);
+        input_tensors[tensor_mapping_.scores_tensor_index()], command_buffer);
     [command_encoder setBuffer:input1_view.buffer() offset:0 atIndex:1];
     MTLSize score_threads_per_group = MTLSizeMake(1, num_classes_, 1);
     MTLSize score_threadgroups = MTLSizeMake(num_boxes_, 1, 1);

mediapipe/calculators/tensor/tensors_to_segmentation_calculator.cc

@@ -53,6 +53,7 @@
 #import <Metal/Metal.h>
 #import <MetalKit/MetalKit.h>
 
+#include "mediapipe/framework/formats/tensor_mtl_buffer_view.h"
 #import "mediapipe/gpu/MPPMetalHelper.h"
 #include "mediapipe/gpu/MPPMetalUtil.h"
 #endif  // MEDIAPIPE_METAL_ENABLED
@@ -485,7 +486,8 @@ absl::Status TensorsToSegmentationCalculator::ProcessGpu(
         [command_buffer computeCommandEncoder];
     [command_encoder setComputePipelineState:mask_program_];
 
-    auto read_view = input_tensors[0].GetMtlBufferReadView(command_buffer);
+    auto read_view =
+        MtlBufferView::GetReadView(input_tensors[0], command_buffer);
     [command_encoder setBuffer:read_view.buffer() offset:0 atIndex:0];
 
     mediapipe::GpuBuffer small_mask_buffer = [metal_helper_

mediapipe/calculators/tensorflow/BUILD

@@ -17,12 +17,11 @@ load("//mediapipe/framework/port:build_config.bzl", "mediapipe_cc_proto_library"
 
 licenses(["notice"])
 
-package(default_visibility = ["//visibility:private"])
+package(default_visibility = ["//visibility:public"])
 
 proto_library(
     name = "graph_tensors_packet_generator_proto",
     srcs = ["graph_tensors_packet_generator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_proto",
         "//mediapipe/framework:packet_generator_proto",
@@ -32,49 +31,42 @@ proto_library(
 proto_library(
     name = "matrix_to_tensor_calculator_options_proto",
     srcs = ["matrix_to_tensor_calculator_options.proto"],
-    visibility = ["//visibility:public"],
     deps = ["//mediapipe/framework:calculator_proto"],
 )
 
 proto_library(
     name = "lapped_tensor_buffer_calculator_proto",
     srcs = ["lapped_tensor_buffer_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = ["//mediapipe/framework:calculator_proto"],
 )
 
 proto_library(
     name = "object_detection_tensors_to_detections_calculator_proto",
     srcs = ["object_detection_tensors_to_detections_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = ["//mediapipe/framework:calculator_proto"],
 )
 
 proto_library(
     name = "tensorflow_inference_calculator_proto",
     srcs = ["tensorflow_inference_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = ["//mediapipe/framework:calculator_proto"],
 )
 
 proto_library(
     name = "tensor_squeeze_dimensions_calculator_proto",
     srcs = ["tensor_squeeze_dimensions_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = ["//mediapipe/framework:calculator_proto"],
 )
 
 proto_library(
     name = "tensor_to_image_frame_calculator_proto",
     srcs = ["tensor_to_image_frame_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = ["//mediapipe/framework:calculator_proto"],
 )
 
 proto_library(
     name = "tensor_to_matrix_calculator_proto",
     srcs = ["tensor_to_matrix_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_proto",
         "//mediapipe/framework/formats:time_series_header_proto",
@@ -84,30 +76,24 @@ proto_library(
 proto_library(
     name = "tensor_to_vector_float_calculator_options_proto",
     srcs = ["tensor_to_vector_float_calculator_options.proto"],
-    visibility = ["//visibility:public"],
     deps = ["//mediapipe/framework:calculator_proto"],
 )
 
 proto_library(
     name = "tensor_to_vector_int_calculator_options_proto",
     srcs = ["tensor_to_vector_int_calculator_options.proto"],
-    visibility = ["//visibility:public"],
     deps = ["//mediapipe/framework:calculator_proto"],
 )
 
 proto_library(
     name = "tensor_to_vector_string_calculator_options_proto",
     srcs = ["tensor_to_vector_string_calculator_options.proto"],
-    visibility = ["//visibility:public"],
     deps = ["//mediapipe/framework:calculator_proto"],
 )
 
 mediapipe_proto_library(
     name = "unpack_media_sequence_calculator_proto",
     srcs = ["unpack_media_sequence_calculator.proto"],
-    visibility = [
-        "//visibility:public",
-    ],
     deps = [
         "//mediapipe/calculators/core:packet_resampler_calculator_proto",
         "//mediapipe/framework:calculator_proto",
@@ -118,14 +104,12 @@ mediapipe_proto_library(
 proto_library(
     name = "vector_float_to_tensor_calculator_options_proto",
     srcs = ["vector_float_to_tensor_calculator_options.proto"],
-    visibility = ["//visibility:public"],
     deps = ["//mediapipe/framework:calculator_proto"],
 )
 
 proto_library(
     name = "vector_string_to_tensor_calculator_options_proto",
     srcs = ["vector_string_to_tensor_calculator_options.proto"],
-    visibility = ["//visibility:public"],
     deps = ["//mediapipe/framework:calculator_proto"],
 )
 
@@ -136,7 +120,6 @@ mediapipe_cc_proto_library(
         "//mediapipe/framework:calculator_cc_proto",
         "//mediapipe/framework:packet_generator_cc_proto",
     ],
-    visibility = ["//visibility:public"],
     deps = [":graph_tensors_packet_generator_proto"],
 )
 
@@ -147,7 +130,6 @@ mediapipe_cc_proto_library(
         "//mediapipe/framework:calculator_cc_proto",
         "@org_tensorflow//tensorflow/core:protos_all_cc",
     ],
-    visibility = ["//visibility:public"],
     deps = [":image_frame_to_tensor_calculator_proto"],
 )
 
@@ -155,7 +137,6 @@ mediapipe_cc_proto_library(
     name = "matrix_to_tensor_calculator_options_cc_proto",
     srcs = ["matrix_to_tensor_calculator_options.proto"],
     cc_deps = ["//mediapipe/framework:calculator_cc_proto"],
-    visibility = ["//visibility:public"],
     deps = [":matrix_to_tensor_calculator_options_proto"],
 )
 
@@ -163,7 +144,6 @@ mediapipe_cc_proto_library(
     name = "lapped_tensor_buffer_calculator_cc_proto",
     srcs = ["lapped_tensor_buffer_calculator.proto"],
     cc_deps = ["//mediapipe/framework:calculator_cc_proto"],
-    visibility = ["//visibility:public"],
     deps = [":lapped_tensor_buffer_calculator_proto"],
 )
 
@@ -171,7 +151,6 @@ mediapipe_cc_proto_library(
     name = "object_detection_tensors_to_detections_calculator_cc_proto",
     srcs = ["object_detection_tensors_to_detections_calculator.proto"],
     cc_deps = ["//mediapipe/framework:calculator_cc_proto"],
-    visibility = ["//visibility:public"],
     deps = [":object_detection_tensors_to_detections_calculator_proto"],
 )
 
@@ -179,7 +158,6 @@ mediapipe_cc_proto_library(
     name = "tensorflow_inference_calculator_cc_proto",
     srcs = ["tensorflow_inference_calculator.proto"],
     cc_deps = ["//mediapipe/framework:calculator_cc_proto"],
-    visibility = ["//visibility:public"],
     deps = [":tensorflow_inference_calculator_proto"],
 )
 
@@ -190,7 +168,6 @@ mediapipe_cc_proto_library(
         "//mediapipe/framework:packet_generator_cc_proto",
         "@org_tensorflow//tensorflow/core:protos_all_cc",
     ],
-    visibility = ["//visibility:public"],
     deps = [":tensorflow_session_from_frozen_graph_generator_proto"],
 )
 
@@ -201,7 +178,6 @@ mediapipe_cc_proto_library(
         "//mediapipe/framework:calculator_cc_proto",
         "@org_tensorflow//tensorflow/core:protos_all_cc",
     ],
-    visibility = ["//visibility:public"],
     deps = [":tensorflow_session_from_frozen_graph_calculator_proto"],
 )
 
@@ -212,7 +188,6 @@ mediapipe_cc_proto_library(
         "//mediapipe/framework:packet_generator_cc_proto",
         "@org_tensorflow//tensorflow/core:protos_all_cc",
     ],
-    visibility = ["//visibility:public"],
     deps = [":tensorflow_session_from_saved_model_generator_proto"],
 )
 
@@ -223,7 +198,6 @@ mediapipe_cc_proto_library(
         "//mediapipe/framework:calculator_cc_proto",
         "@org_tensorflow//tensorflow/core:protos_all_cc",
     ],
-    visibility = ["//visibility:public"],
     deps = [":tensorflow_session_from_saved_model_calculator_proto"],
 )
 
@@ -231,7 +205,6 @@ mediapipe_cc_proto_library(
     name = "tensor_squeeze_dimensions_calculator_cc_proto",
     srcs = ["tensor_squeeze_dimensions_calculator.proto"],
     cc_deps = ["//mediapipe/framework:calculator_cc_proto"],
-    visibility = ["//visibility:public"],
     deps = [":tensor_squeeze_dimensions_calculator_proto"],
 )
 
@@ -239,7 +212,6 @@ mediapipe_cc_proto_library(
     name = "tensor_to_image_frame_calculator_cc_proto",
     srcs = ["tensor_to_image_frame_calculator.proto"],
     cc_deps = ["//mediapipe/framework:calculator_cc_proto"],
-    visibility = ["//visibility:public"],
     deps = [":tensor_to_image_frame_calculator_proto"],
 )
 
@@ -250,7 +222,6 @@ mediapipe_cc_proto_library(
         "//mediapipe/framework:calculator_cc_proto",
         "//mediapipe/framework/formats:time_series_header_cc_proto",
     ],
-    visibility = ["//visibility:public"],
     deps = [":tensor_to_matrix_calculator_proto"],
 )
 
@@ -258,7 +229,6 @@ mediapipe_cc_proto_library(
     name = "tensor_to_vector_float_calculator_options_cc_proto",
     srcs = ["tensor_to_vector_float_calculator_options.proto"],
     cc_deps = ["//mediapipe/framework:calculator_cc_proto"],
-    visibility = ["//visibility:public"],
     deps = [":tensor_to_vector_float_calculator_options_proto"],
 )
 
@@ -266,7 +236,6 @@ mediapipe_cc_proto_library(
     name = "tensor_to_vector_int_calculator_options_cc_proto",
     srcs = ["tensor_to_vector_int_calculator_options.proto"],
     cc_deps = ["//mediapipe/framework:calculator_cc_proto"],
-    visibility = ["//visibility:public"],
     deps = [":tensor_to_vector_int_calculator_options_proto"],
 )
 
@@ -274,7 +243,6 @@ mediapipe_cc_proto_library(
     name = "tensor_to_vector_string_calculator_options_cc_proto",
     srcs = ["tensor_to_vector_string_calculator_options.proto"],
     cc_deps = ["//mediapipe/framework:calculator_cc_proto"],
-    visibility = ["//visibility:public"],
     deps = [":tensor_to_vector_string_calculator_options_proto"],
 )
 
@@ -285,7 +253,6 @@ mediapipe_cc_proto_library(
         "//mediapipe/framework:calculator_cc_proto",
         "@org_tensorflow//tensorflow/core:protos_all_cc",
     ],
-    visibility = ["//visibility:public"],
     deps = [":vector_int_to_tensor_calculator_options_proto"],
 )
 
@@ -293,7 +260,6 @@ mediapipe_cc_proto_library(
     name = "vector_float_to_tensor_calculator_options_cc_proto",
     srcs = ["vector_float_to_tensor_calculator_options.proto"],
     cc_deps = ["//mediapipe/framework:calculator_cc_proto"],
-    visibility = ["//visibility:public"],
     deps = [":vector_float_to_tensor_calculator_options_proto"],
 )
 
@@ -301,14 +267,12 @@ mediapipe_cc_proto_library(
     name = "vector_string_to_tensor_calculator_options_cc_proto",
     srcs = ["vector_string_to_tensor_calculator_options.proto"],
     cc_deps = ["//mediapipe/framework:calculator_cc_proto"],
-    visibility = ["//visibility:public"],
     deps = [":vector_string_to_tensor_calculator_options_proto"],
 )
 
 cc_library(
     name = "graph_tensors_packet_generator",
     srcs = ["graph_tensors_packet_generator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":graph_tensors_packet_generator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -323,7 +287,6 @@ cc_library(
 cc_library(
     name = "image_frame_to_tensor_calculator",
     srcs = ["image_frame_to_tensor_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":image_frame_to_tensor_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -344,10 +307,9 @@ cc_library(
 cc_library(
     name = "matrix_to_tensor_calculator",
     srcs = ["matrix_to_tensor_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
-        "//mediapipe/framework/formats:time_series_header_cc_proto",
         ":matrix_to_tensor_calculator_options_cc_proto",
+        "//mediapipe/framework/formats:time_series_header_cc_proto",
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/formats:matrix",
         "//mediapipe/framework/port:status",
@@ -366,7 +328,6 @@ cc_library(
 cc_library(
     name = "lapped_tensor_buffer_calculator",
     srcs = ["lapped_tensor_buffer_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":lapped_tensor_buffer_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -388,9 +349,6 @@ cc_library(
         # Layering check doesn't play nicely with portable proto wrappers.
         "no_layering_check",
     ],
-    visibility = [
-        "//visibility:public",
-    ],
     deps = [
         ":object_detection_tensors_to_detections_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -407,14 +365,11 @@ cc_library(
 cc_library(
     name = "pack_media_sequence_calculator",
     srcs = ["pack_media_sequence_calculator.cc"],
-    visibility = [
-        "//visibility:public",
-    ],
     deps = [
         "//mediapipe/calculators/image:opencv_image_encoder_calculator_cc_proto",
         "//mediapipe/calculators/tensorflow:pack_media_sequence_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
-        "//mediapipe/framework/formats:detection_cc_proto",  # build_cleaner: keep
+        "//mediapipe/framework/formats:detection_cc_proto",
         "//mediapipe/framework/formats:location",
         "//mediapipe/framework/formats:location_opencv",
         "//mediapipe/framework/port:opencv_imgcodecs",
@@ -432,9 +387,6 @@ cc_library(
 cc_library(
     name = "string_to_sequence_example_calculator",
     srcs = ["string_to_sequence_example_calculator.cc"],
-    visibility = [
-        "//visibility:public",
-    ],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/port:ret_check",
@@ -449,10 +401,9 @@ cc_library(
 cc_library(
     name = "tensorflow_inference_calculator",
     srcs = ["tensorflow_inference_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
-        ":tensorflow_session",
         ":tensorflow_inference_calculator_cc_proto",
+        ":tensorflow_session",
         "@com_google_absl//absl/log:check",
         "//mediapipe/framework:timestamp",
         "@com_google_absl//absl/base:core_headers",
@@ -487,7 +438,6 @@ cc_library(
         "tensorflow_session.h",
     ],
     features = ["no_layering_check"],
-    visibility = ["//visibility:public"],
     deps = select({
         "//conditions:default": [
             "@org_tensorflow//tensorflow/core:core",
@@ -505,7 +455,6 @@ cc_library(
     name = "tensorflow_session_from_frozen_graph_calculator",
     srcs = ["tensorflow_session_from_frozen_graph_calculator.cc"],
     features = ["no_layering_check"],
-    visibility = ["//visibility:public"],
     deps = [
         ":tensorflow_session",
         "//mediapipe/calculators/tensorflow:tensorflow_session_from_frozen_graph_calculator_cc_proto",
@@ -515,6 +464,7 @@ cc_library(
         "//mediapipe/framework/port:logging",
         "//mediapipe/framework/port:status",
         "//mediapipe/framework/port:ret_check",
+        "@org_tensorflow//tensorflow/core:protos_all_cc",
     ] + select({
         "//conditions:default": [
             "//mediapipe/framework/port:file_helpers",
@@ -536,7 +486,6 @@ cc_library(
     name = "tensorflow_session_from_frozen_graph_generator",
     srcs = ["tensorflow_session_from_frozen_graph_generator.cc"],
     features = ["no_layering_check"],
-    visibility = ["//visibility:public"],
     deps = [
         ":tensorflow_session",
         ":tensorflow_session_from_frozen_graph_generator_cc_proto",
@@ -546,6 +495,7 @@ cc_library(
         "//mediapipe/framework/deps:clock",
         "//mediapipe/framework/port:logging",
         "//mediapipe/framework/port:ret_check",
+        "@org_tensorflow//tensorflow/core:protos_all_cc",
     ] + select({
         "//conditions:default": [
             "//mediapipe/framework/port:file_helpers",
@@ -570,7 +520,6 @@ cc_library(
         "//mediapipe:android": ["__ANDROID__"],
         "//conditions:default": [],
     }),
-    visibility = ["//visibility:public"],
     deps = [
         ":tensorflow_session",
         ":tensorflow_session_from_saved_model_calculator_cc_proto",
@@ -609,7 +558,6 @@ cc_library(
         "//mediapipe:android": ["__ANDROID__"],
         "//conditions:default": [],
     }),
-    visibility = ["//visibility:public"],
     deps = [
         ":tensorflow_session",
         ":tensorflow_session_from_saved_model_generator_cc_proto",
@@ -635,7 +583,6 @@ cc_library(
 cc_library(
     name = "tensor_squeeze_dimensions_calculator",
     srcs = ["tensor_squeeze_dimensions_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":tensor_squeeze_dimensions_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -649,7 +596,6 @@ cc_library(
 cc_library(
     name = "tensor_to_image_frame_calculator",
     srcs = ["tensor_to_image_frame_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":tensor_to_image_frame_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -664,10 +610,9 @@ cc_library(
 cc_library(
     name = "tensor_to_matrix_calculator",
     srcs = ["tensor_to_matrix_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
-        "//mediapipe/framework/formats:time_series_header_cc_proto",
         ":tensor_to_matrix_calculator_cc_proto",
+        "//mediapipe/framework/formats:time_series_header_cc_proto",
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/formats:matrix",
         "//mediapipe/framework/port:status",
@@ -686,7 +631,6 @@ cc_library(
 cc_library(
     name = "tfrecord_reader_calculator",
     srcs = ["tfrecord_reader_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/port:integral_types",
@@ -702,12 +646,11 @@ cc_library(
 cc_library(
     name = "tensor_to_vector_float_calculator",
     srcs = ["tensor_to_vector_float_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
+        ":tensor_to_vector_float_calculator_options_cc_proto",
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/port:status",
         "//mediapipe/framework/port:ret_check",
-        ":tensor_to_vector_float_calculator_options_cc_proto",
     ] + select({
         "//conditions:default": [
             "@org_tensorflow//tensorflow/core:framework",
@@ -722,7 +665,6 @@ cc_library(
 cc_library(
     name = "tensor_to_vector_int_calculator",
     srcs = ["tensor_to_vector_int_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":tensor_to_vector_int_calculator_options_cc_proto",
         "@com_google_absl//absl/base:core_headers",
@@ -744,7 +686,6 @@ cc_library(
 cc_library(
     name = "tensor_to_vector_string_calculator",
     srcs = ["tensor_to_vector_string_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/port:status",
@@ -764,9 +705,6 @@ cc_library(
 cc_library(
     name = "unpack_media_sequence_calculator",
     srcs = ["unpack_media_sequence_calculator.cc"],
-    visibility = [
-        "//visibility:public",
-    ],
     deps = [
         "//mediapipe/calculators/core:packet_resampler_calculator_cc_proto",
         "//mediapipe/calculators/tensorflow:unpack_media_sequence_calculator_cc_proto",
@@ -784,7 +722,6 @@ cc_library(
 cc_library(
     name = "vector_int_to_tensor_calculator",
     srcs = ["vector_int_to_tensor_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":vector_int_to_tensor_calculator_options_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -798,7 +735,6 @@ cc_library(
 cc_library(
     name = "vector_float_to_tensor_calculator",
     srcs = ["vector_float_to_tensor_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":vector_float_to_tensor_calculator_options_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -812,7 +748,6 @@ cc_library(
 cc_library(
     name = "vector_string_to_tensor_calculator",
     srcs = ["vector_string_to_tensor_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":vector_string_to_tensor_calculator_options_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -826,7 +761,6 @@ cc_library(
 cc_library(
     name = "unpack_yt8m_sequence_example_calculator",
     srcs = ["unpack_yt8m_sequence_example_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":lapped_tensor_buffer_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -1083,7 +1017,6 @@ cc_test(
     linkstatic = 1,
     deps = [
         ":tensor_to_image_frame_calculator",
-        ":tensor_to_image_frame_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework:calculator_runner",
         "//mediapipe/framework/formats:image_frame",
@@ -1121,6 +1054,7 @@ cc_test(
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework:calculator_runner",
         "//mediapipe/framework/port:gtest_main",
+        "//mediapipe/util:packet_test_util",
         "@org_tensorflow//tensorflow/core:framework",
         "@org_tensorflow//tensorflow/core:protos_all_cc",
     ],
@@ -1236,6 +1170,7 @@ cc_test(
     data = [":test_frozen_graph"],
     linkstatic = 1,
     deps = [
+        ":tensorflow_inference_calculator_cc_proto",
         ":tensorflow_session",
         ":tensorflow_inference_calculator",
         ":tensorflow_session_from_frozen_graph_generator",

mediapipe/calculators/tensorflow/tensor_to_vector_float_calculator.cc

@@ -102,7 +102,7 @@ absl::Status TensorToVectorFloatCalculator::Process(CalculatorContext* cc) {
     }
     auto output =
         absl::make_unique<std::vector<float>>(input_tensor.NumElements());
-    const auto& tensor_values = input_tensor.flat<float>();
+    const auto& tensor_values = input_tensor.unaligned_flat<float>();
     for (int i = 0; i < input_tensor.NumElements(); ++i) {
       output->at(i) = tensor_values(i);
     }

mediapipe/calculators/tensorflow/tensor_to_vector_float_calculator_test.cc

@@ -16,6 +16,7 @@
 #include "mediapipe/framework/calculator_framework.h"
 #include "mediapipe/framework/calculator_runner.h"
 #include "mediapipe/framework/port/gtest.h"
+#include "mediapipe/util/packet_test_util.h"
 #include "tensorflow/core/framework/tensor.h"
 #include "tensorflow/core/framework/types.pb.h"
 
@@ -129,5 +130,28 @@ TEST_F(TensorToVectorFloatCalculatorTest, FlattenShouldTakeAllDimensions) {
   }
 }
 
+TEST_F(TensorToVectorFloatCalculatorTest, AcceptsUnalignedTensors) {
+  SetUpRunner(/*tensor_is_2d=*/false, /*flatten_nd=*/false);
+
+  const tf::TensorShape tensor_shape(std::vector<tf::int64>{2, 5});
+  tf::Tensor tensor(tf::DT_FLOAT, tensor_shape);
+  auto slice = tensor.Slice(1, 1).flat<float>();
+  for (int i = 0; i < 5; ++i) {
+    slice(i) = i;
+  }
+
+  auto input_tensor = tensor.SubSlice(1);
+  // Ensure that the input tensor is unaligned.
+  ASSERT_FALSE(input_tensor.IsAligned());
+  runner_->MutableInputs()->Index(0).packets.push_back(
+      MakePacket<tf::Tensor>(input_tensor).At(Timestamp(5)));
+
+  ASSERT_TRUE(runner_->Run().ok());
+
+  EXPECT_THAT(runner_->Outputs().Index(0).packets,
+              ElementsAre(PacketContainsTimestampAndPayload<std::vector<float>>(
+                  Timestamp(5), std::vector<float>({0, 1, 2, 3, 4}))));
+}
+
 }  // namespace
 }  // namespace mediapipe

mediapipe/calculators/tensorflow/tensor_to_vector_int_calculator.cc

@@ -37,8 +37,10 @@ class TensorToVectorIntCalculator : public CalculatorBase {
 
  private:
   void TokenizeVector(std::vector<int64>* vector) const;
+  void RemoveOverlapVector(std::vector<int64>* vector);
 
   TensorToVectorIntCalculatorOptions options_;
+  int32_t overlapping_values_;
 };
 REGISTER_CALCULATOR(TensorToVectorIntCalculator);
 
@@ -66,6 +68,7 @@ absl::Status TensorToVectorIntCalculator::GetContract(CalculatorContract* cc) {
 
 absl::Status TensorToVectorIntCalculator::Open(CalculatorContext* cc) {
   options_ = cc->Options<TensorToVectorIntCalculatorOptions>();
+  overlapping_values_ = 0;
 
   // Inform mediapipe that this calculator produces an output at time t for
   // each input received at time t (i.e. this calculator does not buffer
@@ -106,6 +109,7 @@ absl::Status TensorToVectorIntCalculator::Process(CalculatorContext* cc) {
         }
       }
       TokenizeVector(&instance_output);
+      RemoveOverlapVector(&instance_output);
     }
     cc->Outputs().Index(0).Add(output.release(), cc->InputTimestamp());
   } else {
@@ -128,12 +132,28 @@ absl::Status TensorToVectorIntCalculator::Process(CalculatorContext* cc) {
       }
     }
     TokenizeVector(output.get());
+    RemoveOverlapVector(output.get());
     cc->Outputs().Index(0).Add(output.release(), cc->InputTimestamp());
   }
 
   return absl::OkStatus();
 }
 
+void TensorToVectorIntCalculator::RemoveOverlapVector(
+    std::vector<int64>* vector) {
+  if (options_.overlap() <= 0) {
+    return;
+  }
+  if (overlapping_values_ > 0) {
+    if (vector->size() < overlapping_values_) {
+      vector->clear();
+    } else {
+      vector->erase(vector->begin(), vector->begin() + overlapping_values_);
+    }
+  }
+  overlapping_values_ = options_.overlap();
+}
+
 void TensorToVectorIntCalculator::TokenizeVector(
     std::vector<int64>* vector) const {
   if (!options_.tensor_is_token()) {

mediapipe/calculators/tensorflow/tensor_to_vector_int_calculator_options.proto

@@ -36,4 +36,8 @@ message TensorToVectorIntCalculatorOptions {
   optional bool tensor_is_token = 3 [default = false];
   // Threshold for the token generation.
   optional float token_threshold = 4 [default = 0.5];
+
+  // Values which overlap between timely following vectors. They are removed
+  // from the output to reduce redundancy.
+  optional int32 overlap = 5 [default = 0];
 }

mediapipe/calculators/tensorflow/tensor_to_vector_int_calculator_test.cc

@@ -28,7 +28,8 @@ namespace tf = ::tensorflow;
 class TensorToVectorIntCalculatorTest : public ::testing::Test {
  protected:
   void SetUpRunner(const bool tensor_is_2d, const bool flatten_nd,
-                   const bool tensor_is_token = false) {
+                   const bool tensor_is_token = false,
+                   const int32_t overlap = 0) {
     CalculatorGraphConfig::Node config;
     config.set_calculator("TensorToVectorIntCalculator");
     config.add_input_stream("input_tensor");
@@ -38,6 +39,7 @@ class TensorToVectorIntCalculatorTest : public ::testing::Test {
     options->set_tensor_is_2d(tensor_is_2d);
     options->set_flatten_nd(flatten_nd);
     options->set_tensor_is_token(tensor_is_token);
+    options->set_overlap(overlap);
     runner_ = absl::make_unique<CalculatorRunner>(config);
   }
 
@@ -188,5 +190,54 @@ TEST_F(TensorToVectorIntCalculatorTest, FlattenShouldTakeAllDimensions) {
   }
 }
 
+TEST_F(TensorToVectorIntCalculatorTest, Overlap) {
+  SetUpRunner(false, false, false, 2);
+  for (int time = 0; time < 3; ++time) {
+    const tf::TensorShape tensor_shape(std::vector<tf::int64>{5});
+    auto tensor = absl::make_unique<tf::Tensor>(tf::DT_INT64, tensor_shape);
+    auto tensor_vec = tensor->vec<int64>();
+    for (int i = 0; i < 5; ++i) {
+      // 2^i can be represented exactly in floating point numbers if 'i' is
+      // small.
+      tensor_vec(i) = static_cast<int64>(time + (1 << i));
+    }
+
+    runner_->MutableInputs()->Index(0).packets.push_back(
+        Adopt(tensor.release()).At(Timestamp(time)));
+  }
+
+  ASSERT_TRUE(runner_->Run().ok());
+  const std::vector<Packet>& output_packets =
+      runner_->Outputs().Index(0).packets;
+  EXPECT_EQ(3, output_packets.size());
+
+  {
+    // First vector in full.
+    int time = 0;
+    EXPECT_EQ(time, output_packets[time].Timestamp().Value());
+    const std::vector<int64>& output_vector =
+        output_packets[time].Get<std::vector<int64>>();
+
+    EXPECT_EQ(5, output_vector.size());
+    for (int i = 0; i < 5; ++i) {
+      const int64 expected = static_cast<int64>(time + (1 << i));
+      EXPECT_EQ(expected, output_vector[i]);
+    }
+  }
+
+  // All following vectors the overlap removed
+  for (int time = 1; time < 3; ++time) {
+    EXPECT_EQ(time, output_packets[time].Timestamp().Value());
+    const std::vector<int64>& output_vector =
+        output_packets[time].Get<std::vector<int64>>();
+
+    EXPECT_EQ(3, output_vector.size());
+    for (int i = 0; i < 3; ++i) {
+      const int64 expected = static_cast<int64>(time + (1 << (i + 2)));
+      EXPECT_EQ(expected, output_vector[i]);
+    }
+  }
+}
+
 }  // namespace
 }  // namespace mediapipe

mediapipe/calculators/tensorflow/tensorflow_session_from_saved_model_calculator.cc

@@ -55,7 +55,7 @@ absl::Status GetLatestDirectory(std::string* path) {
 }
 
 // If options.convert_signature_to_tags() is set, will convert letters to
-// uppercase and replace /'s and -'s with _'s. This enables the standard
+// uppercase and replace /, -, . and :'s with _'s. This enables the standard
 // SavedModel classification, regression, and prediction signatures to be used
 // as uppercase INPUTS and OUTPUTS tags for streams and supports other common
 // patterns.
@@ -67,9 +67,8 @@ const std::string MaybeConvertSignatureToTag(
     output.resize(name.length());
     std::transform(name.begin(), name.end(), output.begin(),
                    [](unsigned char c) { return std::toupper(c); });
-    output = absl::StrReplaceAll(output, {{"/", "_"}});
+    output = absl::StrReplaceAll(
-    output = absl::StrReplaceAll(output, {{"-", "_"}});
+        output, {{"/", "_"}, {"-", "_"}, {".", "_"}, {":", "_"}});
-    output = absl::StrReplaceAll(output, {{".", "_"}});
     LOG(INFO) << "Renamed TAG from: " << name << " to " << output;
     return output;
   } else {

mediapipe/calculators/tensorflow/tensorflow_session_from_saved_model_calculator.proto

@@ -33,8 +33,8 @@ message TensorFlowSessionFromSavedModelCalculatorOptions {
   // The name of the generic signature to load into the mapping from tags to
   // tensor names.
   optional string signature_name = 2 [default = "serving_default"];
-  // Whether to convert the signature keys to uppercase as well as switch /'s
+  // Whether to convert the signature keys to uppercase as well as switch
-  // and -'s to _'s, which enables common signatures to be used as Tags.
+  // /, -, .and :'s to _'s, which enables common signatures to be used as Tags.
   optional bool convert_signature_to_tags = 3 [default = true];
   // If true, saved_model_path can have multiple exported models in
   // subdirectories saved_model_path/%08d and the alphabetically last (i.e.,

mediapipe/calculators/tensorflow/tensorflow_session_from_saved_model_generator.cc

@@ -61,7 +61,7 @@ absl::Status GetLatestDirectory(std::string* path) {
 }
 
 // If options.convert_signature_to_tags() is set, will convert letters to
-// uppercase and replace /'s and -'s with _'s. This enables the standard
+// uppercase and replace /, -, and .'s with _'s. This enables the standard
 // SavedModel classification, regression, and prediction signatures to be used
 // as uppercase INPUTS and OUTPUTS tags for streams and supports other common
 // patterns.
@@ -73,9 +73,8 @@ const std::string MaybeConvertSignatureToTag(
     output.resize(name.length());
     std::transform(name.begin(), name.end(), output.begin(),
                    [](unsigned char c) { return std::toupper(c); });
-    output = absl::StrReplaceAll(output, {{"/", "_"}});
+    output = absl::StrReplaceAll(
-    output = absl::StrReplaceAll(output, {{"-", "_"}});
+        output, {{"/", "_"}, {"-", "_"}, {".", "_"}, {":", "_"}});
-    output = absl::StrReplaceAll(output, {{".", "_"}});
     LOG(INFO) << "Renamed TAG from: " << name << " to " << output;
     return output;
   } else {

mediapipe/calculators/tensorflow/tensorflow_session_from_saved_model_generator.proto

@@ -33,8 +33,8 @@ message TensorFlowSessionFromSavedModelGeneratorOptions {
   // The name of the generic signature to load into the mapping from tags to
   // tensor names.
   optional string signature_name = 2 [default = "serving_default"];
-  // Whether to convert the signature keys to uppercase as well as switch /'s
+  // Whether to convert the signature keys to uppercase, as well as switch /'s
-  // and -'s to _'s, which enables common signatures to be used as Tags.
+  // -'s, .'s, and :'s to _'s, enabling common signatures to be used as Tags.
   optional bool convert_signature_to_tags = 3 [default = true];
   // If true, saved_model_path can have multiple exported models in
   // subdirectories saved_model_path/%08d and the alphabetically last (i.e.,

mediapipe/calculators/tensorflow/unpack_media_sequence_calculator_test.cc

@@ -647,7 +647,7 @@ TEST_F(UnpackMediaSequenceCalculatorTest, GetAudioDecoderOptionsOverride) {
 
 TEST_F(UnpackMediaSequenceCalculatorTest, GetPacketResamplingOptions) {
   // TODO: Suport proto3 proto.Any in CalculatorOptions.
-  // TODO: Avoid proto2 extensions in "RESAMPLER_OPTIONS".
+  // TODO: Avoid google::protobuf extensions in "RESAMPLER_OPTIONS".
   CalculatorOptions options;
   options.MutableExtension(UnpackMediaSequenceCalculatorOptions::ext)
       ->set_padding_before_label(1);

mediapipe/calculators/tflite/BUILD

@@ -18,12 +18,11 @@ load("@bazel_skylib//lib:selects.bzl", "selects")
 
 licenses(["notice"])
 
-package(default_visibility = ["//visibility:private"])
+package(default_visibility = ["//visibility:public"])
 
 mediapipe_proto_library(
     name = "ssd_anchors_calculator_proto",
     srcs = ["ssd_anchors_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -33,7 +32,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "tflite_custom_op_resolver_calculator_proto",
     srcs = ["tflite_custom_op_resolver_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -43,7 +41,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "tflite_inference_calculator_proto",
     srcs = ["tflite_inference_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -53,7 +50,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "tflite_converter_calculator_proto",
     srcs = ["tflite_converter_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -63,7 +59,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "tflite_tensors_to_segmentation_calculator_proto",
     srcs = ["tflite_tensors_to_segmentation_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -73,7 +68,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "tflite_tensors_to_detections_calculator_proto",
     srcs = ["tflite_tensors_to_detections_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -83,7 +77,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "tflite_tensors_to_classification_calculator_proto",
     srcs = ["tflite_tensors_to_classification_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -93,7 +86,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "tflite_tensors_to_landmarks_calculator_proto",
     srcs = ["tflite_tensors_to_landmarks_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -103,7 +95,6 @@ mediapipe_proto_library(
 cc_library(
     name = "ssd_anchors_calculator",
     srcs = ["ssd_anchors_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":ssd_anchors_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -117,7 +108,6 @@ cc_library(
 cc_library(
     name = "tflite_custom_op_resolver_calculator",
     srcs = ["tflite_custom_op_resolver_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":tflite_custom_op_resolver_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -208,7 +198,6 @@ cc_library(
         ],
         "//conditions:default": [],
     }),
-    visibility = ["//visibility:public"],
     deps = [
         ":tflite_inference_calculator_cc_proto",
         "@com_google_absl//absl/memory",
@@ -287,10 +276,9 @@ cc_library(
         ],
         "//conditions:default": [],
     }),
-    visibility = ["//visibility:public"],
     deps = [
-        "//mediapipe/util/tflite:config",
         ":tflite_converter_calculator_cc_proto",
+        "//mediapipe/util/tflite:config",
         "//mediapipe/util:resource_util",
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/formats:image_frame",
@@ -326,7 +314,6 @@ cc_library(
 cc_library(
     name = "tflite_model_calculator",
     srcs = ["tflite_model_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework:packet",
@@ -340,7 +327,6 @@ cc_library(
 cc_library(
     name = "tflite_tensors_to_segmentation_calculator",
     srcs = ["tflite_tensors_to_segmentation_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":tflite_tensors_to_segmentation_calculator_cc_proto",
         "@com_google_absl//absl/strings:str_format",
@@ -408,17 +394,16 @@ cc_library(
         ],
         "//conditions:default": [],
     }),
-    visibility = ["//visibility:public"],
     deps = [
-        "//mediapipe/util/tflite:config",
         ":tflite_tensors_to_detections_calculator_cc_proto",
         "//mediapipe/framework/formats:detection_cc_proto",
+        "//mediapipe/framework/formats/object_detection:anchor_cc_proto",
+        "//mediapipe/util/tflite:config",
         "@com_google_absl//absl/strings:str_format",
         "@com_google_absl//absl/types:span",
         "//mediapipe/framework/deps:file_path",
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/formats:location",
-        "//mediapipe/framework/formats/object_detection:anchor_cc_proto",
         "//mediapipe/framework/port:ret_check",
         "@org_tensorflow//tensorflow/lite:framework",
     ] + selects.with_or({
@@ -444,7 +429,6 @@ cc_library(
 cc_library(
     name = "tflite_tensors_to_classification_calculator",
     srcs = ["tflite_tensors_to_classification_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":tflite_tensors_to_classification_calculator_cc_proto",
         "@com_google_absl//absl/container:node_hash_map",
@@ -476,7 +460,6 @@ cc_library(
 cc_library(
     name = "tflite_tensors_to_landmarks_calculator",
     srcs = ["tflite_tensors_to_landmarks_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":tflite_tensors_to_landmarks_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -490,7 +473,6 @@ cc_library(
 cc_library(
     name = "tflite_tensors_to_floats_calculator",
     srcs = ["tflite_tensors_to_floats_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/port:ret_check",

mediapipe/calculators/tflite/tflite_inference_calculator.cc

@@ -485,9 +485,9 @@ absl::Status TfLiteInferenceCalculator::WriteKernelsToFile() {
 #if MEDIAPIPE_TFLITE_GL_INFERENCE && defined(MEDIAPIPE_ANDROID)
   if (use_kernel_caching_) {
     // Save kernel file.
-    auto kernel_cache = absl::make_unique<std::vector<uint8_t>>(
+    ASSIGN_OR_RETURN(std::vector<uint8_t> kernel_cache,
-        tflite_gpu_runner_->GetSerializedBinaryCache());
+                     tflite_gpu_runner_->GetSerializedBinaryCache());
-    std::string cache_str(kernel_cache->begin(), kernel_cache->end());
+    std::string cache_str(kernel_cache.begin(), kernel_cache.end());
     MP_RETURN_IF_ERROR(
         mediapipe::file::SetContents(cached_kernel_filename_, cache_str));
   }

mediapipe/calculators/util/BUILD

@@ -21,10 +21,9 @@ package(default_visibility = ["//visibility:public"])
 cc_library(
     name = "alignment_points_to_rects_calculator",
     srcs = ["alignment_points_to_rects_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
-        "//mediapipe/calculators/util:detections_to_rects_calculator",
+        ":detections_to_rects_calculator",
-        "//mediapipe/calculators/util:detections_to_rects_calculator_cc_proto",
+        ":detections_to_rects_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework:calculator_options_cc_proto",
         "//mediapipe/framework/formats:detection_cc_proto",
@@ -39,7 +38,6 @@ cc_library(
 mediapipe_proto_library(
     name = "annotation_overlay_calculator_proto",
     srcs = ["annotation_overlay_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -50,7 +48,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "detection_label_id_to_text_calculator_proto",
     srcs = ["detection_label_id_to_text_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -61,7 +58,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "filter_detections_calculator_proto",
     srcs = ["filter_detections_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -71,7 +67,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "timed_box_list_id_to_label_calculator_proto",
     srcs = ["timed_box_list_id_to_label_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -81,13 +76,11 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "latency_proto",
     srcs = ["latency.proto"],
-    visibility = ["//visibility:public"],
 )
 
 mediapipe_proto_library(
     name = "non_max_suppression_calculator_proto",
     srcs = ["non_max_suppression_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -97,13 +90,11 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "packet_frequency_proto",
     srcs = ["packet_frequency.proto"],
-    visibility = ["//visibility:public"],
 )
 
 mediapipe_proto_library(
     name = "packet_frequency_calculator_proto",
     srcs = ["packet_frequency_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -113,7 +104,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "packet_latency_calculator_proto",
     srcs = ["packet_latency_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -123,7 +113,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "collection_has_min_size_calculator_proto",
     srcs = ["collection_has_min_size_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -133,7 +122,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "association_calculator_proto",
     srcs = ["association_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -143,7 +131,6 @@ mediapipe_proto_library(
 cc_library(
     name = "packet_frequency_calculator",
     srcs = ["packet_frequency_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/calculators/util:packet_frequency_calculator_cc_proto",
         "//mediapipe/calculators/util:packet_frequency_cc_proto",
@@ -188,7 +175,6 @@ cc_test(
 cc_library(
     name = "packet_latency_calculator",
     srcs = ["packet_latency_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/calculators/util:latency_cc_proto",
         "//mediapipe/calculators/util:packet_latency_calculator_cc_proto",
@@ -228,9 +214,6 @@ cc_test(
 cc_library(
     name = "clock_timestamp_calculator",
     srcs = ["clock_timestamp_calculator.cc"],
-    visibility = [
-        "//visibility:public",
-    ],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework:timestamp",
@@ -246,9 +229,6 @@ cc_library(
 cc_library(
     name = "clock_latency_calculator",
     srcs = ["clock_latency_calculator.cc"],
-    visibility = [
-        "//visibility:public",
-    ],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework:timestamp",
@@ -263,11 +243,10 @@ cc_library(
 cc_library(
     name = "annotation_overlay_calculator",
     srcs = ["annotation_overlay_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":annotation_overlay_calculator_cc_proto",
-        "//mediapipe/framework:calculator_options_cc_proto",
         "//mediapipe/framework/formats:image_format_cc_proto",
+        "//mediapipe/framework:calculator_options_cc_proto",
         "//mediapipe/util:color_cc_proto",
         "@com_google_absl//absl/strings",
         "//mediapipe/framework:calculator_framework",
@@ -296,7 +275,6 @@ cc_library(
 cc_library(
     name = "detection_label_id_to_text_calculator",
     srcs = ["detection_label_id_to_text_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":detection_label_id_to_text_calculator_cc_proto",
         "//mediapipe/framework/formats:detection_cc_proto",
@@ -328,7 +306,6 @@ cc_library(
 cc_library(
     name = "timed_box_list_id_to_label_calculator",
     srcs = ["timed_box_list_id_to_label_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":timed_box_list_id_to_label_calculator_cc_proto",
         "@com_google_absl//absl/container:node_hash_map",
@@ -357,7 +334,6 @@ cc_library(
 cc_library(
     name = "detection_transformation_calculator",
     srcs = ["detection_transformation_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/api2:node",
@@ -391,7 +367,6 @@ cc_test(
 cc_library(
     name = "non_max_suppression_calculator",
     srcs = ["non_max_suppression_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":non_max_suppression_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -408,7 +383,6 @@ cc_library(
 cc_library(
     name = "thresholding_calculator",
     srcs = ["thresholding_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":thresholding_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -421,7 +395,6 @@ cc_library(
 cc_library(
     name = "detection_to_landmarks_calculator",
     srcs = ["detection_to_landmarks_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/formats:detection_cc_proto",
@@ -436,7 +409,6 @@ cc_library(
 cc_library(
     name = "filter_detections_calculator",
     srcs = ["filter_detections_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":filter_detections_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -450,7 +422,6 @@ cc_library(
 cc_library(
     name = "landmarks_to_detection_calculator",
     srcs = ["landmarks_to_detection_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":landmarks_to_detection_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -471,7 +442,6 @@ cc_library(
     hdrs = [
         "detections_to_rects_calculator.h",
     ],
-    visibility = ["//visibility:public"],
     deps = [
         ":detections_to_rects_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -486,10 +456,26 @@ cc_library(
     alwayslink = 1,
 )
 
+cc_library(
+    name = "detections_deduplicate_calculator",
+    srcs = [
+        "detections_deduplicate_calculator.cc",
+    ],
+    deps = [
+        "//mediapipe/framework:calculator_framework",
+        "//mediapipe/framework/api2:node",
+        "//mediapipe/framework/api2:port",
+        "//mediapipe/framework/formats:detection_cc_proto",
+        "//mediapipe/framework/formats:location_data_cc_proto",
+        "@com_google_absl//absl/container:flat_hash_map",
+        "@com_google_absl//absl/status",
+    ],
+    alwayslink = 1,
+)
+
 cc_library(
     name = "rect_transformation_calculator",
     srcs = ["rect_transformation_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":rect_transformation_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -504,7 +490,6 @@ cc_library(
 cc_library(
     name = "rect_projection_calculator",
     srcs = ["rect_projection_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/formats:rect_cc_proto",
@@ -535,7 +520,6 @@ cc_test(
 mediapipe_proto_library(
     name = "rect_to_render_data_calculator_proto",
     srcs = ["rect_to_render_data_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -547,7 +531,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "rect_to_render_scale_calculator_proto",
     srcs = ["rect_to_render_scale_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -557,7 +540,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "detections_to_render_data_calculator_proto",
     srcs = ["detections_to_render_data_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -569,7 +551,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "landmarks_to_render_data_calculator_proto",
     srcs = ["landmarks_to_render_data_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -581,7 +562,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "timed_box_list_to_render_data_calculator_proto",
     srcs = ["timed_box_list_to_render_data_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -593,7 +573,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "labels_to_render_data_calculator_proto",
     srcs = ["labels_to_render_data_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -605,7 +584,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "thresholding_calculator_proto",
     srcs = ["thresholding_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -617,7 +595,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "detections_to_rects_calculator_proto",
     srcs = ["detections_to_rects_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -627,7 +604,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "landmark_projection_calculator_proto",
     srcs = ["landmark_projection_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -637,7 +613,6 @@ mediapipe_proto_library(
 cc_library(
     name = "landmark_visibility_calculator",
     srcs = ["landmark_visibility_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/formats:landmark_cc_proto",
@@ -649,7 +624,6 @@ cc_library(
 cc_library(
     name = "set_landmark_visibility_calculator",
     srcs = ["set_landmark_visibility_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/formats:landmark_cc_proto",
@@ -661,7 +635,6 @@ cc_library(
 mediapipe_proto_library(
     name = "landmarks_to_floats_calculator_proto",
     srcs = ["landmarks_to_floats_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -671,7 +644,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "rect_transformation_calculator_proto",
     srcs = ["rect_transformation_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -681,7 +653,6 @@ mediapipe_proto_library(
 mediapipe_proto_library(
     name = "landmarks_to_detection_calculator_proto",
     srcs = ["landmarks_to_detection_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -693,7 +664,6 @@ mediapipe_proto_library(
 cc_library(
     name = "detections_to_render_data_calculator",
     srcs = ["detections_to_render_data_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":detections_to_render_data_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -713,7 +683,6 @@ cc_library(
     name = "landmarks_to_render_data_calculator",
     srcs = ["landmarks_to_render_data_calculator.cc"],
     hdrs = ["landmarks_to_render_data_calculator.h"],
-    visibility = ["//visibility:public"],
     deps = [
         ":landmarks_to_render_data_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -732,7 +701,6 @@ cc_library(
 cc_library(
     name = "timed_box_list_to_render_data_calculator",
     srcs = ["timed_box_list_to_render_data_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":timed_box_list_to_render_data_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -751,11 +719,9 @@ cc_library(
 cc_library(
     name = "labels_to_render_data_calculator",
     srcs = ["labels_to_render_data_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":labels_to_render_data_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
-        "//mediapipe/framework:calculator_options_cc_proto",
         "//mediapipe/framework/formats:classification_cc_proto",
         "//mediapipe/framework/formats:video_stream_header",
         "//mediapipe/framework/port:ret_check",
@@ -771,7 +737,6 @@ cc_library(
 cc_library(
     name = "rect_to_render_data_calculator",
     srcs = ["rect_to_render_data_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":rect_to_render_data_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -786,7 +751,6 @@ cc_library(
 cc_library(
     name = "rect_to_render_scale_calculator",
     srcs = ["rect_to_render_scale_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":rect_to_render_scale_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -821,7 +785,6 @@ cc_test(
 cc_library(
     name = "detection_letterbox_removal_calculator",
     srcs = ["detection_letterbox_removal_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/formats:detection_cc_proto",
@@ -835,7 +798,6 @@ cc_library(
 cc_library(
     name = "detection_projection_calculator",
     srcs = ["detection_projection_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/formats:detection_cc_proto",
@@ -868,7 +830,6 @@ cc_test(
 cc_library(
     name = "landmark_letterbox_removal_calculator",
     srcs = ["landmark_letterbox_removal_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/formats:landmark_cc_proto",
@@ -882,7 +843,6 @@ cc_library(
 cc_library(
     name = "landmark_projection_calculator",
     srcs = ["landmark_projection_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":landmark_projection_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -915,7 +875,6 @@ cc_test(
 cc_library(
     name = "world_landmark_projection_calculator",
     srcs = ["world_landmark_projection_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/formats:landmark_cc_proto",
@@ -929,7 +888,6 @@ cc_library(
 mediapipe_proto_library(
     name = "landmarks_smoothing_calculator_proto",
     srcs = ["landmarks_smoothing_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -939,7 +897,6 @@ mediapipe_proto_library(
 cc_library(
     name = "landmarks_smoothing_calculator",
     srcs = ["landmarks_smoothing_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":landmarks_smoothing_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -957,7 +914,6 @@ cc_library(
 mediapipe_proto_library(
     name = "visibility_smoothing_calculator_proto",
     srcs = ["visibility_smoothing_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -967,7 +923,6 @@ mediapipe_proto_library(
 cc_library(
     name = "visibility_smoothing_calculator",
     srcs = ["visibility_smoothing_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":visibility_smoothing_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -983,7 +938,6 @@ cc_library(
 mediapipe_proto_library(
     name = "visibility_copy_calculator_proto",
     srcs = ["visibility_copy_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -993,7 +947,6 @@ mediapipe_proto_library(
 cc_library(
     name = "visibility_copy_calculator",
     srcs = ["visibility_copy_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":visibility_copy_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -1008,7 +961,6 @@ cc_library(
 cc_library(
     name = "landmarks_to_floats_calculator",
     srcs = ["landmarks_to_floats_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":landmarks_to_floats_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -1055,7 +1007,6 @@ cc_test(
 mediapipe_proto_library(
     name = "top_k_scores_calculator_proto",
     srcs = ["top_k_scores_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -1065,7 +1016,6 @@ mediapipe_proto_library(
 cc_library(
     name = "top_k_scores_calculator",
     srcs = ["top_k_scores_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":top_k_scores_calculator_cc_proto",
         "@com_google_absl//absl/container:node_hash_map",
@@ -1109,7 +1059,6 @@ cc_test(
 mediapipe_proto_library(
     name = "local_file_contents_calculator_proto",
     srcs = ["local_file_contents_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -1119,7 +1068,6 @@ mediapipe_proto_library(
 cc_library(
     name = "local_file_contents_calculator",
     srcs = ["local_file_contents_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":local_file_contents_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -1133,7 +1081,6 @@ cc_library(
 cc_library(
     name = "local_file_pattern_contents_calculator",
     srcs = ["local_file_pattern_contents_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/port:file_helpers",
@@ -1147,7 +1094,6 @@ cc_library(
     name = "filter_collection_calculator",
     srcs = ["filter_collection_calculator.cc"],
     hdrs = ["filter_collection_calculator.h"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/formats:classification_cc_proto",
@@ -1165,7 +1111,6 @@ cc_library(
     name = "collection_has_min_size_calculator",
     srcs = ["collection_has_min_size_calculator.cc"],
     hdrs = ["collection_has_min_size_calculator.h"],
-    visibility = ["//visibility:public"],
     deps = [
         ":collection_has_min_size_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -1193,7 +1138,6 @@ cc_test(
 cc_library(
     name = "association_calculator",
     hdrs = ["association_calculator.h"],
-    visibility = ["//visibility:public"],
     deps = [
         ":association_calculator_cc_proto",
         "//mediapipe/framework:calculator_context",
@@ -1210,7 +1154,6 @@ cc_library(
 cc_library(
     name = "association_norm_rect_calculator",
     srcs = ["association_norm_rect_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":association_calculator",
         "//mediapipe/framework:calculator_context",
@@ -1225,7 +1168,6 @@ cc_library(
 cc_library(
     name = "association_detection_calculator",
     srcs = ["association_detection_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":association_calculator",
         "//mediapipe/framework:calculator_context",
@@ -1260,7 +1202,6 @@ cc_test(
 cc_library(
     name = "detections_to_timed_box_list_calculator",
     srcs = ["detections_to_timed_box_list_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/formats:detection_cc_proto",
@@ -1275,7 +1216,6 @@ cc_library(
 cc_library(
     name = "detection_unique_id_calculator",
     srcs = ["detection_unique_id_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/formats:detection_cc_proto",
@@ -1288,7 +1228,6 @@ cc_library(
 mediapipe_proto_library(
     name = "logic_calculator_proto",
     srcs = ["logic_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -1298,7 +1237,6 @@ mediapipe_proto_library(
 cc_library(
     name = "logic_calculator",
     srcs = ["logic_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":logic_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -1311,10 +1249,9 @@ cc_library(
 cc_library(
     name = "to_image_calculator",
     srcs = ["to_image_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
-        "//mediapipe/framework:calculator_options_cc_proto",
         "//mediapipe/framework/formats:image_format_cc_proto",
+        "//mediapipe/framework:calculator_options_cc_proto",
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/api2:node",
         "//mediapipe/framework/formats:image_frame",
@@ -1334,10 +1271,9 @@ cc_library(
 cc_library(
     name = "from_image_calculator",
     srcs = ["from_image_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
-        "//mediapipe/framework:calculator_options_cc_proto",
         "//mediapipe/framework/formats:image_format_cc_proto",
+        "//mediapipe/framework:calculator_options_cc_proto",
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/formats:image_frame",
         "//mediapipe/framework/formats:image",
@@ -1386,7 +1322,6 @@ cc_test(
 mediapipe_proto_library(
     name = "refine_landmarks_from_heatmap_calculator_proto",
     srcs = ["refine_landmarks_from_heatmap_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_options_proto",
         "//mediapipe/framework:calculator_proto",
@@ -1404,7 +1339,6 @@ cc_library(
         ],
         "//conditions:default": [],
     }),
-    visibility = ["//visibility:public"],
     deps = [
         ":refine_landmarks_from_heatmap_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -1455,7 +1389,6 @@ cc_library(
     name = "inverse_matrix_calculator",
     srcs = ["inverse_matrix_calculator.cc"],
     hdrs = ["inverse_matrix_calculator.h"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/api2:node",

mediapipe/calculators/util/detections_deduplicate_calculator.cc

@@ -0,0 +1,114 @@
+/* Copyright 2022 The MediaPipe Authors. All Rights Reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+==============================================================================*/
+
+#include <algorithm>
+#include <memory>
+#include <utility>
+#include <vector>
+
+#include "absl/container/flat_hash_map.h"
+#include "absl/status/status.h"
+#include "mediapipe/framework/api2/node.h"
+#include "mediapipe/framework/api2/port.h"
+#include "mediapipe/framework/calculator_framework.h"
+#include "mediapipe/framework/formats/detection.pb.h"
+#include "mediapipe/framework/formats/location_data.pb.h"
+
+namespace mediapipe {
+namespace api2 {
+namespace {
+
+struct BoundingBoxHash {
+  size_t operator()(const LocationData::BoundingBox& bbox) const {
+    return std::hash<int>{}(bbox.xmin()) ^ std::hash<int>{}(bbox.ymin()) ^
+           std::hash<int>{}(bbox.width()) ^ std::hash<int>{}(bbox.height());
+  }
+};
+
+struct BoundingBoxEq {
+  bool operator()(const LocationData::BoundingBox& lhs,
+                  const LocationData::BoundingBox& rhs) const {
+    return lhs.xmin() == rhs.xmin() && lhs.ymin() == rhs.ymin() &&
+           lhs.width() == rhs.width() && lhs.height() == rhs.height();
+  }
+};
+
+}  // namespace
+
+// This Calculator deduplicates the bunding boxes with exactly the same
+// coordinates, and folds the labels into a single Detection proto. Note
+// non-maximum-suppression remove the overlapping bounding boxes within a class,
+// while the deduplication operation merges bounding boxes from different
+// classes.
+
+// Example config:
+// node {
+//   calculator: "DetectionsDeduplicateCalculator"
+//   input_stream: "detections"
+//   output_stream: "deduplicated_detections"
+// }
+class DetectionsDeduplicateCalculator : public Node {
+ public:
+  static constexpr Input<std::vector<Detection>> kIn{""};
+  static constexpr Output<std::vector<Detection>> kOut{""};
+
+  MEDIAPIPE_NODE_CONTRACT(kIn, kOut);
+
+  absl::Status Open(mediapipe::CalculatorContext* cc) {
+    cc->SetOffset(::mediapipe::TimestampDiff(0));
+    return absl::OkStatus();
+  }
+
+  absl::Status Process(mediapipe::CalculatorContext* cc) {
+    const std::vector<Detection>& raw_detections = kIn(cc).Get();
+    absl::flat_hash_map<LocationData::BoundingBox, Detection*, BoundingBoxHash,
+                        BoundingBoxEq>
+        bbox_to_detections;
+    std::vector<Detection> deduplicated_detections;
+    for (const auto& detection : raw_detections) {
+      if (!detection.has_location_data() ||
+          !detection.location_data().has_bounding_box()) {
+        return absl::InvalidArgumentError(
+            "The location data of Detections must be BoundingBox.");
+      }
+      if (bbox_to_detections.contains(
+              detection.location_data().bounding_box())) {
+        // The bbox location already exists. Merge the detection labels into
+        // the existing detection proto.
+        Detection& deduplicated_detection =
+            *bbox_to_detections[detection.location_data().bounding_box()];
+        deduplicated_detection.mutable_score()->MergeFrom(detection.score());
+        deduplicated_detection.mutable_label()->MergeFrom(detection.label());
+        deduplicated_detection.mutable_label_id()->MergeFrom(
+            detection.label_id());
+        deduplicated_detection.mutable_display_name()->MergeFrom(
+            detection.display_name());
+      } else {
+        // The bbox location appears first time. Add the detection to output
+        // detection vector.
+        deduplicated_detections.push_back(detection);
+        bbox_to_detections[detection.location_data().bounding_box()] =
+            &deduplicated_detections.back();
+      }
+    }
+    kOut(cc).Send(std::move(deduplicated_detections));
+    return absl::OkStatus();
+  }
+};
+
+MEDIAPIPE_REGISTER_NODE(DetectionsDeduplicateCalculator);
+
+}  // namespace api2
+}  // namespace mediapipe

mediapipe/calculators/util/detections_to_rects_calculator.cc

@@ -37,6 +37,9 @@ constexpr char kNormRectTag[] = "NORM_RECT";
 constexpr char kRectsTag[] = "RECTS";
 constexpr char kNormRectsTag[] = "NORM_RECTS";
 
+using ::mediapipe::NormalizedRect;
+using ::mediapipe::Rect;
+
 constexpr float kMinFloat = std::numeric_limits<float>::lowest();
 constexpr float kMaxFloat = std::numeric_limits<float>::max();
 

mediapipe/calculators/util/detections_to_rects_calculator_test.cc

@@ -39,6 +39,9 @@ constexpr char kImageSizeTag[] = "IMAGE_SIZE";
 constexpr char kRectTag[] = "RECT";
 constexpr char kDetectionTag[] = "DETECTION";
 
+using ::mediapipe::NormalizedRect;
+using ::mediapipe::Rect;
+
 MATCHER_P4(RectEq, x_center, y_center, width, height, "") {
   return testing::Value(arg.x_center(), testing::Eq(x_center)) &&
          testing::Value(arg.y_center(), testing::Eq(y_center)) &&

mediapipe/calculators/util/landmark_projection_calculator.cc

@@ -24,6 +24,8 @@
 
 namespace mediapipe {
 
+using ::mediapipe::NormalizedRect;
+
 namespace {
 
 constexpr char kLandmarksTag[] = "NORM_LANDMARKS";

mediapipe/calculators/util/landmarks_smoothing_calculator.cc

@@ -35,7 +35,9 @@ constexpr char kObjectScaleRoiTag[] = "OBJECT_SCALE_ROI";
 constexpr char kNormalizedFilteredLandmarksTag[] = "NORM_FILTERED_LANDMARKS";
 constexpr char kFilteredLandmarksTag[] = "FILTERED_LANDMARKS";
 
+using ::mediapipe::NormalizedRect;
 using mediapipe::OneEuroFilter;
+using ::mediapipe::Rect;
 using mediapipe::RelativeVelocityFilter;
 
 void NormalizedLandmarksToLandmarks(

mediapipe/calculators/util/rect_projection_calculator.cc

@@ -23,6 +23,8 @@ namespace {
 constexpr char kNormRectTag[] = "NORM_RECT";
 constexpr char kNormReferenceRectTag[] = "NORM_REFERENCE_RECT";
 
+using ::mediapipe::NormalizedRect;
+
 }  // namespace
 
 // Projects rectangle from reference coordinate system (defined by reference

mediapipe/calculators/util/rect_to_render_data_calculator.cc

@@ -29,6 +29,9 @@ constexpr char kNormRectsTag[] = "NORM_RECTS";
 constexpr char kRectsTag[] = "RECTS";
 constexpr char kRenderDataTag[] = "RENDER_DATA";
 
+using ::mediapipe::NormalizedRect;
+using ::mediapipe::Rect;
+
 RenderAnnotation::Rectangle* NewRect(
     const RectToRenderDataCalculatorOptions& options, RenderData* render_data) {
   auto* annotation = render_data->add_render_annotations();

mediapipe/calculators/util/rect_to_render_scale_calculator.cc

@@ -24,6 +24,8 @@ constexpr char kNormRectTag[] = "NORM_RECT";
 constexpr char kImageSizeTag[] = "IMAGE_SIZE";
 constexpr char kRenderScaleTag[] = "RENDER_SCALE";
 
+using ::mediapipe::NormalizedRect;
+
 }  // namespace
 
 // A calculator to get scale for RenderData primitives.
@@ -78,7 +80,9 @@ absl::Status RectToRenderScaleCalculator::GetContract(CalculatorContract* cc) {
   cc->Inputs().Tag(kNormRectTag).Set<NormalizedRect>();
   cc->Inputs().Tag(kImageSizeTag).Set<std::pair<int, int>>();
   cc->Outputs().Tag(kRenderScaleTag).Set<float>();
-
+  cc->SetProcessTimestampBounds(
+      cc->Options<RectToRenderScaleCalculatorOptions>()
+          .process_timestamp_bounds());
   return absl::OkStatus();
 }
 

mediapipe/calculators/util/rect_to_render_scale_calculator.proto

@@ -29,4 +29,8 @@ message RectToRenderScaleCalculatorOptions {
   // when actual object size on the image will be `B`, than all RenderData
   // primitives will be scaled with factor `B/A`.
   optional float multiplier = 1 [default = 0.01];
+
+  // When true, Process is called for every new timestamp bound, with or without
+  // new packets.
+  optional bool process_timestamp_bounds = 2 [default = false];
 }

mediapipe/calculators/util/rect_transformation_calculator.cc

@@ -28,6 +28,9 @@ constexpr char kRectTag[] = "RECT";
 constexpr char kRectsTag[] = "RECTS";
 constexpr char kImageSizeTag[] = "IMAGE_SIZE";
 
+using ::mediapipe::NormalizedRect;
+using ::mediapipe::Rect;
+
 // Wraps around an angle in radians to within -M_PI and M_PI.
 inline float NormalizeRadians(float angle) {
   return angle - 2 * M_PI * std::floor((angle - (-M_PI)) / (2 * M_PI));

mediapipe/calculators/util/world_landmark_projection_calculator.cc

@@ -22,6 +22,8 @@
 
 namespace mediapipe {
 
+using ::mediapipe::NormalizedRect;
+
 namespace {
 
 constexpr char kLandmarksTag[] = "LANDMARKS";

mediapipe/calculators/video/BUILD

@@ -21,19 +21,17 @@ load(
 
 licenses(["notice"])
 
-package(default_visibility = ["//visibility:private"])
+package(default_visibility = ["//visibility:public"])
 
 proto_library(
     name = "flow_to_image_calculator_proto",
     srcs = ["flow_to_image_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = ["//mediapipe/framework:calculator_proto"],
 )
 
 proto_library(
     name = "opencv_video_encoder_calculator_proto",
     srcs = ["opencv_video_encoder_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = ["//mediapipe/framework:calculator_proto"],
 )
 
@@ -58,7 +56,6 @@ proto_library(
 proto_library(
     name = "box_tracker_calculator_proto",
     srcs = ["box_tracker_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_proto",
         "//mediapipe/util/tracking:box_tracker_proto",
@@ -68,7 +65,6 @@ proto_library(
 proto_library(
     name = "tracked_detection_manager_calculator_proto",
     srcs = ["tracked_detection_manager_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_proto",
         "//mediapipe/util/tracking:tracked_detection_manager_config_proto",
@@ -78,7 +74,6 @@ proto_library(
 proto_library(
     name = "box_detector_calculator_proto",
     srcs = ["box_detector_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_proto",
         "//mediapipe/util/tracking:box_detector_proto",
@@ -88,7 +83,6 @@ proto_library(
 proto_library(
     name = "video_pre_stream_calculator_proto",
     srcs = ["video_pre_stream_calculator.proto"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_proto",
     ],
@@ -101,7 +95,6 @@ mediapipe_cc_proto_library(
         "//mediapipe/framework:calculator_cc_proto",
         "//mediapipe/util/tracking:motion_analysis_cc_proto",
     ],
-    visibility = ["//visibility:public"],
     deps = [":motion_analysis_calculator_proto"],
 )
 
@@ -112,7 +105,6 @@ mediapipe_cc_proto_library(
         "//mediapipe/framework:calculator_cc_proto",
         "//mediapipe/util/tracking:flow_packager_cc_proto",
     ],
-    visibility = ["//visibility:public"],
     deps = [":flow_packager_calculator_proto"],
 )
 
@@ -123,7 +115,6 @@ mediapipe_cc_proto_library(
         "//mediapipe/framework:calculator_cc_proto",
         "//mediapipe/util/tracking:box_tracker_cc_proto",
     ],
-    visibility = ["//visibility:public"],
     deps = [":box_tracker_calculator_proto"],
 )
 
@@ -134,7 +125,6 @@ mediapipe_cc_proto_library(
         "//mediapipe/framework:calculator_cc_proto",
         "//mediapipe/util/tracking:tracked_detection_manager_config_cc_proto",
     ],
-    visibility = ["//visibility:public"],
     deps = [":tracked_detection_manager_calculator_proto"],
 )
 
@@ -145,7 +135,6 @@ mediapipe_cc_proto_library(
         "//mediapipe/framework:calculator_cc_proto",
         "//mediapipe/util/tracking:box_detector_cc_proto",
     ],
-    visibility = ["//visibility:public"],
     deps = [":box_detector_calculator_proto"],
 )
 
@@ -155,7 +144,6 @@ mediapipe_cc_proto_library(
     cc_deps = [
         "//mediapipe/framework:calculator_cc_proto",
     ],
-    visibility = ["//visibility:public"],
     deps = [":video_pre_stream_calculator_proto"],
 )
 
@@ -163,7 +151,6 @@ mediapipe_cc_proto_library(
     name = "flow_to_image_calculator_cc_proto",
     srcs = ["flow_to_image_calculator.proto"],
     cc_deps = ["//mediapipe/framework:calculator_cc_proto"],
-    visibility = ["//visibility:public"],
     deps = [":flow_to_image_calculator_proto"],
 )
 
@@ -171,14 +158,12 @@ mediapipe_cc_proto_library(
     name = "opencv_video_encoder_calculator_cc_proto",
     srcs = ["opencv_video_encoder_calculator.proto"],
     cc_deps = ["//mediapipe/framework:calculator_cc_proto"],
-    visibility = ["//visibility:public"],
     deps = [":opencv_video_encoder_calculator_proto"],
 )
 
 cc_library(
     name = "flow_to_image_calculator",
     srcs = ["flow_to_image_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":flow_to_image_calculator_cc_proto",
         "//mediapipe/calculators/video/tool:flow_quantizer_model",
@@ -198,7 +183,6 @@ cc_library(
 cc_library(
     name = "opencv_video_decoder_calculator",
     srcs = ["opencv_video_decoder_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/formats:image_format_cc_proto",
@@ -217,7 +201,6 @@ cc_library(
 cc_library(
     name = "opencv_video_encoder_calculator",
     srcs = ["opencv_video_encoder_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":opencv_video_encoder_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -240,7 +223,6 @@ cc_library(
 cc_library(
     name = "tvl1_optical_flow_calculator",
     srcs = ["tvl1_optical_flow_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/framework:calculator_framework",
         "//mediapipe/framework/formats:image_frame",
@@ -256,7 +238,6 @@ cc_library(
 cc_library(
     name = "motion_analysis_calculator",
     srcs = ["motion_analysis_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":motion_analysis_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -282,7 +263,6 @@ cc_library(
 cc_library(
     name = "flow_packager_calculator",
     srcs = ["flow_packager_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":flow_packager_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -300,7 +280,6 @@ cc_library(
 cc_library(
     name = "box_tracker_calculator",
     srcs = ["box_tracker_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":box_tracker_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -327,7 +306,6 @@ cc_library(
 cc_library(
     name = "box_detector_calculator",
     srcs = ["box_detector_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":box_detector_calculator_cc_proto",
         "@com_google_absl//absl/memory",
@@ -342,12 +320,12 @@ cc_library(
         "//mediapipe/framework/port:opencv_features2d",
         "//mediapipe/framework/port:ret_check",
         "//mediapipe/framework/port:status",
+        "//mediapipe/util/tracking:box_tracker_cc_proto",
+        "//mediapipe/util/tracking:flow_packager_cc_proto",
         "//mediapipe/util:resource_util",
         "//mediapipe/util/tracking",
         "//mediapipe/util/tracking:box_detector",
         "//mediapipe/util/tracking:box_tracker",
-        "//mediapipe/util/tracking:box_tracker_cc_proto",
-        "//mediapipe/util/tracking:flow_packager_cc_proto",
         "//mediapipe/util/tracking:tracking_visualization_utilities",
     ] + select({
         "//mediapipe:android": [
@@ -369,7 +347,6 @@ cc_library(
 cc_library(
     name = "tracked_detection_manager_calculator",
     srcs = ["tracked_detection_manager_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":tracked_detection_manager_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -390,7 +367,6 @@ cc_library(
 cc_library(
     name = "video_pre_stream_calculator",
     srcs = ["video_pre_stream_calculator.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         ":video_pre_stream_calculator_cc_proto",
         "//mediapipe/framework:calculator_framework",
@@ -407,7 +383,6 @@ filegroup(
         "testdata/format_MKV_VP8_VORBIS.video",
         "testdata/format_MP4_AVC720P_AAC.video",
     ],
-    visibility = ["//visibility:public"],
 )
 
 cc_test(
@@ -480,7 +455,6 @@ mediapipe_binary_graph(
     name = "parallel_tracker_binarypb",
     graph = "testdata/parallel_tracker_graph.pbtxt",
     output_name = "testdata/parallel_tracker.binarypb",
-    visibility = ["//visibility:public"],
     deps = [
         ":box_tracker_calculator",
         ":flow_packager_calculator",
@@ -494,7 +468,6 @@ mediapipe_binary_graph(
     name = "tracker_binarypb",
     graph = "testdata/tracker_graph.pbtxt",
     output_name = "testdata/tracker.binarypb",
-    visibility = ["//visibility:public"],
     deps = [
         ":box_tracker_calculator",
         ":flow_packager_calculator",

mediapipe/calculators/video/tracked_detection_manager_calculator.cc

@@ -32,6 +32,8 @@
 namespace mediapipe {
 namespace {
 
+using ::mediapipe::NormalizedRect;
+
 constexpr int kDetectionUpdateTimeOutMS = 5000;
 constexpr char kDetectionsTag[] = "DETECTIONS";
 constexpr char kDetectionBoxesTag[] = "DETECTION_BOXES";

mediapipe/examples/android/solutions/gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.4-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.6-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

mediapipe/examples/android/src/java/com/google/mediapipe/apps/instantmotiontracking/GIFEditText.java

@@ -18,7 +18,7 @@ import android.content.ClipDescription;
 import android.content.Context;
 import android.net.Uri;
 import android.os.Bundle;
-import android.support.v7.widget.AppCompatEditText;
+import androidx.appcompat.widget.AppCompatEditText;
 import android.util.AttributeSet;
 import android.util.Log;
 import android.view.inputmethod.EditorInfo;

mediapipe/examples/desktop/autoflip/BUILD

@@ -18,6 +18,8 @@ licenses(["notice"])
 
 package(default_visibility = [
     "//mediapipe/examples:__subpackages__",
+    "//photos/editing/mobile/mediapipe/calculators:__subpackages__",
+    "//photos/editing/mobile/mediapipe/proto:__subpackages__",
 ])
 
 proto_library(
@@ -30,6 +32,10 @@ proto_library(
 
 java_lite_proto_library(
     name = "autoflip_messages_java_proto_lite",
+    visibility = [
+        "//java/com/google/android/apps/photos:__subpackages__",
+        "//javatests/com/google/android/apps/photos:__subpackages__",
+    ],
     deps = [
         ":autoflip_messages_proto",
     ],
@@ -41,6 +47,8 @@ mediapipe_cc_proto_library(
     cc_deps = ["//mediapipe/framework:calculator_cc_proto"],
     visibility = [
         "//mediapipe/examples:__subpackages__",
+        "//photos/editing/mobile/mediapipe/calculators:__pkg__",
+        "//photos/editing/mobile/mediapipe/calculators:__subpackages__",
     ],
     deps = [":autoflip_messages_proto"],
 )

mediapipe/examples/desktop/autoflip/autoflip_messages.proto

@@ -185,6 +185,10 @@ message ExternalRenderFrame {
   // original dimensions of the input video.  The first step to render this
   // frame is to crop this rect from the input frame.
   optional Rect crop_from_location = 1;
+  // Rect that must be cropped out of the input frame.  It is defined in the
+  // ratio of the frame of the input video.  The first step to render this frame
+  // is to crop this rect from the input frame.
+  optional Rect normalized_crop_from_location = 7;
   // The placement location where the above rect is placed on the output frame.
   // This will always have the same aspect ratio as the above rect but scaling
   // may be required.

mediapipe/examples/desktop/autoflip/calculators/scene_cropping_calculator.cc

@@ -201,13 +201,26 @@ absl::Status ParseAspectRatioString(const std::string& aspect_ratio_string,
 void ConstructExternalRenderMessage(
     const cv::Rect& crop_from_location, const cv::Rect& render_to_location,
     const cv::Scalar& padding_color, const uint64 timestamp_us,
-    ExternalRenderFrame* external_render_message) {
+    ExternalRenderFrame* external_render_message, int frame_width,
+    int frame_height) {
   auto crop_from_message =
       external_render_message->mutable_crop_from_location();
   crop_from_message->set_x(crop_from_location.x);
   crop_from_message->set_y(crop_from_location.y);
   crop_from_message->set_width(crop_from_location.width);
   crop_from_message->set_height(crop_from_location.height);
+
+  auto normalized_crop_from_message =
+      external_render_message->mutable_normalized_crop_from_location();
+  normalized_crop_from_message->set_x(crop_from_location.x /
+                                      static_cast<float>(frame_width));
+  normalized_crop_from_message->set_y(crop_from_location.y /
+                                      static_cast<float>(frame_height));
+  normalized_crop_from_message->set_width(crop_from_location.width /
+                                          static_cast<float>(frame_width));
+  normalized_crop_from_message->set_height(crop_from_location.height /
+                                           static_cast<float>(frame_height));
+
   auto render_to_message =
       external_render_message->mutable_render_to_location();
   render_to_message->set_x(render_to_location.x);
@@ -627,7 +640,8 @@ absl::Status SceneCroppingCalculator::ProcessScene(const bool is_end_of_scene,
       auto external_render_message = absl::make_unique<ExternalRenderFrame>();
       ConstructExternalRenderMessage(
           crop_from_locations[i], render_to_locations[i], padding_colors[i],
-          scene_frame_timestamps_[i], external_render_message.get());
+          scene_frame_timestamps_[i], external_render_message.get(),
+          frame_width_, frame_height_);
       cc->Outputs()
           .Tag(kExternalRenderingPerFrame)
           .Add(external_render_message.release(),
@@ -640,7 +654,8 @@ absl::Status SceneCroppingCalculator::ProcessScene(const bool is_end_of_scene,
       ExternalRenderFrame render_frame;
       ConstructExternalRenderMessage(crop_from_locations[i],
                                      render_to_locations[i], padding_colors[i],
-                                     scene_frame_timestamps_[i], &render_frame);
+                                     scene_frame_timestamps_[i], &render_frame,
+                                     frame_width_, frame_height_);
       external_render_list_->push_back(render_frame);
     }
   }

mediapipe/examples/desktop/autoflip/calculators/scene_cropping_calculator_test.cc

@@ -920,6 +920,41 @@ TEST(SceneCroppingCalculatorTest, OutputsCropMessageKinematicPathNoVideo) {
     EXPECT_EQ(ext_render_message.render_to_location().height(), 1124);
   }
 }
+
+// Checks external render message with default poly path solver using
+// normalized crops.
+TEST(SceneCroppingCalculatorTest, OutputsCropMessagePolyPathNormalized) {
+  const CalculatorGraphConfig::Node config =
+      ParseTextProtoOrDie<CalculatorGraphConfig::Node>(
+          absl::Substitute(kExternalRenderConfig, kTargetWidth, kTargetHeight));
+  auto runner = absl::make_unique<CalculatorRunner>(config);
+  const int num_frames = kSceneSize;
+  AddScene(0, num_frames, kInputFrameWidth, kInputFrameHeight, kKeyFrameWidth,
+           kKeyFrameHeight, 1, runner->MutableInputs());
+
+  MP_EXPECT_OK(runner->Run());
+  const auto& outputs = runner->Outputs();
+  const auto& ext_render_per_frame =
+      outputs.Tag(kExternalRenderingPerFrameTag).packets;
+  EXPECT_EQ(ext_render_per_frame.size(), num_frames);
+
+  for (int i = 0; i < num_frames - 1; ++i) {
+    const auto& ext_render_message =
+        ext_render_per_frame[i].Get<ExternalRenderFrame>();
+    EXPECT_EQ(ext_render_message.timestamp_us(), i * 20000);
+    EXPECT_EQ(ext_render_message.normalized_crop_from_location().x(),
+              725 / static_cast<float>(kInputFrameWidth));
+    EXPECT_EQ(ext_render_message.normalized_crop_from_location().y(), 0);
+    EXPECT_EQ(ext_render_message.normalized_crop_from_location().width(),
+              461 / static_cast<float>(kInputFrameWidth));
+    EXPECT_EQ(ext_render_message.normalized_crop_from_location().height(),
+              720 / static_cast<float>(kInputFrameHeight));
+    EXPECT_EQ(ext_render_message.render_to_location().x(), 0);
+    EXPECT_EQ(ext_render_message.render_to_location().y(), 0);
+    EXPECT_EQ(ext_render_message.render_to_location().width(), 720);
+    EXPECT_EQ(ext_render_message.render_to_location().height(), 1124);
+  }
+}
 }  // namespace
 }  // namespace autoflip
 }  // namespace mediapipe

mediapipe/examples/desktop/hello_world/BUILD

@@ -14,12 +14,11 @@
 
 licenses(["notice"])
 
-package(default_visibility = ["//mediapipe/examples:__subpackages__"])
+package(default_visibility = ["//visibility:public"])
 
 cc_binary(
     name = "hello_world",
     srcs = ["hello_world.cc"],
-    visibility = ["//visibility:public"],
     deps = [
         "//mediapipe/calculators/core:pass_through_calculator",
         "//mediapipe/framework:calculator_graph",

mediapipe/examples/ios/common/BUILD

@@ -29,12 +29,6 @@ objc_library(
         "Base.lproj/LaunchScreen.storyboard",
         "Base.lproj/Main.storyboard",
     ],
-    sdk_frameworks = [
-        "AVFoundation",
-        "CoreGraphics",
-        "CoreMedia",
-        "UIKit",
-    ],
     visibility = [
         "//mediapipe:__subpackages__",
     ],
@@ -42,6 +36,10 @@ objc_library(
         "//mediapipe/objc:mediapipe_framework_ios",
         "//mediapipe/objc:mediapipe_input_sources_ios",
         "//mediapipe/objc:mediapipe_layer_renderer",
+        "//third_party/apple_frameworks:AVFoundation",
+        "//third_party/apple_frameworks:CoreGraphics",
+        "//third_party/apple_frameworks:CoreMedia",
+        "//third_party/apple_frameworks:UIKit",
     ],
 )
 

mediapipe/examples/ios/faceeffect/BUILD

@@ -73,13 +73,13 @@ objc_library(
         "//mediapipe/modules/face_landmark:face_landmark.tflite",
     ],
     features = ["-layering_check"],
-    sdk_frameworks = [
-        "AVFoundation",
-        "CoreGraphics",
-        "CoreMedia",
-        "UIKit",
-    ],
     deps = [
+        "//mediapipe/framework/formats:matrix_data_cc_proto",
+        "//third_party/apple_frameworks:AVFoundation",
+        "//third_party/apple_frameworks:CoreGraphics",
+        "//third_party/apple_frameworks:CoreMedia",
+        "//third_party/apple_frameworks:UIKit",
+        "//mediapipe/modules/face_geometry/protos:face_geometry_cc_proto",
         "//mediapipe/objc:mediapipe_framework_ios",
         "//mediapipe/objc:mediapipe_input_sources_ios",
         "//mediapipe/objc:mediapipe_layer_renderer",
@@ -87,9 +87,7 @@ objc_library(
         "//mediapipe:ios_i386": [],
         "//mediapipe:ios_x86_64": [],
         "//conditions:default": [
-            "//mediapipe/framework/formats:matrix_data_cc_proto",
             "//mediapipe/graphs/face_effect:face_effect_gpu_deps",
-            "//mediapipe/modules/face_geometry/protos:face_geometry_cc_proto",
         ],
     }),
 )

mediapipe/examples/ios/facemeshgpu/BUILD

@@ -67,12 +67,12 @@ objc_library(
     ],
     deps = [
         "//mediapipe/examples/ios/common:CommonMediaPipeAppLibrary",
+        "//mediapipe/framework/formats:landmark_cc_proto",
     ] + select({
         "//mediapipe:ios_i386": [],
         "//mediapipe:ios_x86_64": [],
         "//conditions:default": [
             "//mediapipe/graphs/face_mesh:mobile_calculators",
-            "//mediapipe/framework/formats:landmark_cc_proto",
         ],
     }),
 )

mediapipe/examples/ios/handtrackinggpu/BUILD

@@ -68,12 +68,12 @@ objc_library(
     ],
     deps = [
         "//mediapipe/examples/ios/common:CommonMediaPipeAppLibrary",
+        "//mediapipe/framework/formats:landmark_cc_proto",
     ] + select({
         "//mediapipe:ios_i386": [],
         "//mediapipe:ios_x86_64": [],
         "//conditions:default": [
             "//mediapipe/graphs/hand_tracking:mobile_calculators",
-            "//mediapipe/framework/formats:landmark_cc_proto",
         ],
     }),
 )

mediapipe/examples/ios/iristrackinggpu/BUILD

@@ -68,12 +68,12 @@ objc_library(
     ],
     deps = [
         "//mediapipe/examples/ios/common:CommonMediaPipeAppLibrary",
+        "//mediapipe/framework/formats:landmark_cc_proto",
     ] + select({
         "//mediapipe:ios_i386": [],
         "//mediapipe:ios_x86_64": [],
         "//conditions:default": [
             "//mediapipe/graphs/iris_tracking:iris_tracking_gpu_deps",
-            "//mediapipe/framework/formats:landmark_cc_proto",
         ],
     }),
 )

mediapipe/examples/ios/posetrackinggpu/BUILD

@@ -67,12 +67,12 @@ objc_library(
     ],
     deps = [
         "//mediapipe/examples/ios/common:CommonMediaPipeAppLibrary",
+        "//mediapipe/framework/formats:landmark_cc_proto",
     ] + select({
         "//mediapipe:ios_i386": [],
         "//mediapipe:ios_x86_64": [],
         "//conditions:default": [
             "//mediapipe/graphs/pose_tracking:pose_tracking_gpu_deps",
-            "//mediapipe/framework/formats:landmark_cc_proto",
         ],
     }),
 )

mediapipe/framework/BUILD

@@ -1,4 +1,3 @@
-#
 # Copyright 2019 The MediaPipe Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -21,6 +20,7 @@ licenses(["notice"])
 
 package(default_visibility = ["//visibility:private"])
 
+# The MediaPipe internal package group. No mediapipe users should be added to this group.
 package_group(
     name = "mediapipe_internal",
     packages = [
@@ -56,12 +56,12 @@ mediapipe_proto_library(
     srcs = ["calculator.proto"],
     visibility = ["//visibility:public"],
     deps = [
-        "//mediapipe/framework:calculator_options_proto",
+        ":calculator_options_proto",
-        "//mediapipe/framework:mediapipe_options_proto",
+        ":mediapipe_options_proto",
-        "//mediapipe/framework:packet_factory_proto",
+        ":packet_factory_proto",
-        "//mediapipe/framework:packet_generator_proto",
+        ":packet_generator_proto",
-        "//mediapipe/framework:status_handler_proto",
+        ":status_handler_proto",
-        "//mediapipe/framework:stream_handler_proto",
+        ":stream_handler_proto",
         "@com_google_protobuf//:any_proto",
     ],
 )
@@ -78,8 +78,8 @@ mediapipe_proto_library(
     srcs = ["calculator_contract_test.proto"],
     visibility = ["//mediapipe/framework:__subpackages__"],
     deps = [
-        "//mediapipe/framework:calculator_options_proto",
+        ":calculator_options_proto",
-        "//mediapipe/framework:calculator_proto",
+        ":calculator_proto",
     ],
 )
 
@@ -88,15 +88,17 @@ mediapipe_proto_library(
     srcs = ["calculator_profile.proto"],
     visibility = ["//visibility:public"],
     deps = [
-        "//mediapipe/framework:calculator_options_proto",
+        ":calculator_options_proto",
-        "//mediapipe/framework:calculator_proto",
+        ":calculator_proto",
     ],
 )
 
 mediapipe_proto_library(
     name = "mediapipe_options_proto",
     srcs = ["mediapipe_options.proto"],
-    visibility = [":mediapipe_internal"],
+    visibility = [
+        ":mediapipe_internal",
+    ],
 )
 
 mediapipe_proto_library(
@@ -125,24 +127,24 @@ mediapipe_proto_library(
     name = "status_handler_proto",
     srcs = ["status_handler.proto"],
     visibility = [":mediapipe_internal"],
-    deps = ["//mediapipe/framework:mediapipe_options_proto"],
+    deps = [":mediapipe_options_proto"],
 )
 
 mediapipe_proto_library(
     name = "stream_handler_proto",
     srcs = ["stream_handler.proto"],
     visibility = [":mediapipe_internal"],
-    deps = ["//mediapipe/framework:mediapipe_options_proto"],
+    deps = [":mediapipe_options_proto"],
 )
 
 mediapipe_proto_library(
     name = "test_calculators_proto",
     testonly = 1,
     srcs = ["test_calculators.proto"],
-    visibility = ["//visibility:public"],
+    visibility = [":mediapipe_internal"],
     deps = [
-        "//mediapipe/framework:calculator_options_proto",
+        ":calculator_options_proto",
-        "//mediapipe/framework:calculator_proto",
+        ":calculator_proto",
     ],
 )
 
@@ -150,7 +152,7 @@ mediapipe_proto_library(
     name = "thread_pool_executor_proto",
     srcs = ["thread_pool_executor.proto"],
     visibility = [":mediapipe_internal"],
-    deps = ["//mediapipe/framework:mediapipe_options_proto"],
+    deps = [":mediapipe_options_proto"],
 )
 
 # It is for pure-native Android builds where the library can't have any dependency on libandroid.so
@@ -226,13 +228,13 @@ cc_library(
         ":mediapipe_internal",
     ],
     deps = [
+        ":calculator_cc_proto",
         ":graph_service",
+        ":mediapipe_options_cc_proto",
+        ":packet_generator_cc_proto",
         ":packet_type",
         ":port",
-        "//mediapipe/framework:calculator_cc_proto",
+        ":status_handler_cc_proto",
-        "//mediapipe/framework:mediapipe_options_cc_proto",
-        "//mediapipe/framework:packet_generator_cc_proto",
-        "//mediapipe/framework:status_handler_cc_proto",
         "//mediapipe/framework/port:any_proto",
         "//mediapipe/framework/port:status",
         "//mediapipe/framework/tool:options_map",
@@ -328,10 +330,10 @@ cc_library(
         ":thread_pool_executor",
         ":timestamp",
         ":validated_graph_config",
-        "//mediapipe/framework:calculator_cc_proto",
+        ":calculator_cc_proto",
-        "//mediapipe/framework:packet_generator_cc_proto",
+        ":packet_generator_cc_proto",
-        "//mediapipe/framework:status_handler_cc_proto",
+        ":status_handler_cc_proto",
-        "//mediapipe/framework:thread_pool_executor_cc_proto",
+        ":thread_pool_executor_cc_proto",
         "@com_google_absl//absl/base:core_headers",
         "@com_google_absl//absl/container:fixed_array",
         "@com_google_absl//absl/container:flat_hash_map",
@@ -369,7 +371,7 @@ cc_library(
     visibility = [":mediapipe_internal"],
     deps = [
         ":graph_service",
-        "//mediapipe/framework:packet",
+        ":packet",
         "@com_google_absl//absl/status",
     ],
 )
@@ -379,7 +381,7 @@ cc_test(
     srcs = ["graph_service_manager_test.cc"],
     deps = [
         ":graph_service_manager",
-        "//mediapipe/framework:packet",
+        ":packet",
         "//mediapipe/framework/port:gtest_main",
     ],
 )
@@ -391,6 +393,7 @@ cc_library(
     visibility = [":mediapipe_internal"],
     deps = [
         ":calculator_base",
+        ":calculator_cc_proto",
         ":calculator_context",
         ":calculator_context_manager",
         ":calculator_state",
@@ -407,10 +410,9 @@ cc_library(
         ":packet_set",
         ":packet_type",
         ":port",
+        ":stream_handler_cc_proto",
         ":timestamp",
         ":validated_graph_config",
-        "//mediapipe/framework:calculator_cc_proto",
-        "//mediapipe/framework:stream_handler_cc_proto",
         "//mediapipe/framework/port:core_proto",
         "//mediapipe/framework/port:integral_types",
         "//mediapipe/framework/port:logging",
@@ -466,6 +468,7 @@ cc_library(
     hdrs = ["calculator_state.h"],
     visibility = [":mediapipe_internal"],
     deps = [
+        ":calculator_cc_proto",
         ":counter",
         ":counter_factory",
         ":graph_service",
@@ -475,7 +478,6 @@ cc_library(
         ":packet",
         ":packet_set",
         ":port",
-        "//mediapipe/framework:calculator_cc_proto",
         "//mediapipe/framework/port:any_proto",
         "//mediapipe/framework/port:logging",
         "//mediapipe/framework/tool:options_map",
@@ -583,7 +585,7 @@ cc_library(
     hdrs = ["executor.h"],
     visibility = ["//visibility:public"],
     deps = [
-        "//mediapipe/framework:mediapipe_options_cc_proto",
+        ":mediapipe_options_cc_proto",
         "//mediapipe/framework/deps:registration",
         "//mediapipe/framework/port:status",
         "//mediapipe/framework/port:statusor",
@@ -670,11 +672,11 @@ cc_library(
         ":collection_item_id",
         ":input_stream_manager",
         ":input_stream_shard",
+        ":mediapipe_options_cc_proto",
         ":mediapipe_profiling",
         ":packet",
         ":packet_set",
         ":packet_type",
-        "//mediapipe/framework:mediapipe_options_cc_proto",
         "//mediapipe/framework/deps:registration",
         "//mediapipe/framework/port:ret_check",
         "//mediapipe/framework/port:status",
@@ -784,12 +786,12 @@ cc_library(
         ":calculator_context_manager",
         ":collection",
         ":collection_item_id",
+        ":mediapipe_options_cc_proto",
         ":output_stream_manager",
         ":output_stream_shard",
         ":packet_set",
         ":packet_type",
         ":timestamp",
-        "//mediapipe/framework:mediapipe_options_cc_proto",
         "//mediapipe/framework/deps:registration",
         "//mediapipe/framework/port:logging",
         "//mediapipe/framework/port:status",
@@ -875,10 +877,10 @@ cc_library(
     visibility = ["//visibility:public"],
     deps = [
         ":packet",
+        ":packet_generator_cc_proto",
         ":packet_set",
         ":packet_type",
         ":port",
-        "//mediapipe/framework:packet_generator_cc_proto",
         "//mediapipe/framework/deps:registration",
         "//mediapipe/framework/port:core_proto",
         "//mediapipe/framework/port:status",
@@ -896,13 +898,13 @@ cc_library(
         ":delegating_executor",
         ":executor",
         ":packet",
+        ":packet_factory_cc_proto",
         ":packet_generator",
+        ":packet_generator_cc_proto",
         ":packet_type",
         ":port",
         ":thread_pool_executor",
         ":validated_graph_config",
-        "//mediapipe/framework:packet_factory_cc_proto",
-        "//mediapipe/framework:packet_generator_cc_proto",
         "//mediapipe/framework/port:core_proto",
         "//mediapipe/framework/port:logging",
         "//mediapipe/framework/port:ret_check",
@@ -1019,10 +1021,10 @@ cc_library(
     hdrs = ["status_handler.h"],
     visibility = ["//visibility:public"],
     deps = [
+        ":mediapipe_options_cc_proto",
         ":packet_set",
         ":packet_type",
         ":port",
-        "//mediapipe/framework:mediapipe_options_cc_proto",
         "//mediapipe/framework/deps:registration",
         "//mediapipe/framework/port:status",
         "@com_google_absl//absl/memory",
@@ -1035,11 +1037,10 @@ cc_library(
     hdrs = ["subgraph.h"],
     visibility = ["//visibility:public"],
     deps = [
+        ":calculator_cc_proto",
         ":graph_service",
         ":graph_service_manager",
         ":port",
-        "//mediapipe/framework:calculator_cc_proto",
-        "//mediapipe/framework:mediapipe_options_cc_proto",
         "//mediapipe/framework/deps:registration",
         "//mediapipe/framework/port:ret_check",
         "//mediapipe/framework/port:status",
@@ -1050,6 +1051,7 @@ cc_library(
         "@com_google_absl//absl/base:core_headers",
         "@com_google_absl//absl/memory",
         "@com_google_absl//absl/status",
+        "@com_google_absl//absl/strings",
         "@com_google_absl//absl/types:optional",
     ],
 )
@@ -1061,7 +1063,7 @@ cc_library(
     visibility = ["//visibility:public"],
     deps = [
         ":calculator_framework",
-        "//mediapipe/framework:test_calculators_cc_proto",
+        ":test_calculators_cc_proto",
         "//mediapipe/framework/deps:mathutil",
         "//mediapipe/framework/formats:matrix",
         "//mediapipe/framework/port:integral_types",
@@ -1098,7 +1100,7 @@ cc_library(
     visibility = ["//visibility:public"],
     deps = [
         ":executor",
-        "//mediapipe/framework:thread_pool_executor_cc_proto",
+        ":thread_pool_executor_cc_proto",
         "//mediapipe/framework/deps:thread_options",
         "//mediapipe/framework/port:logging",
         "//mediapipe/framework/port:status",
@@ -1163,22 +1165,22 @@ cc_library(
     visibility = ["//visibility:public"],
     deps = [
         ":calculator_base",
+        ":calculator_cc_proto",
         ":calculator_contract",
         ":graph_service_manager",
         ":legacy_calculator_support",
         ":packet",
         ":packet_generator",
+        ":packet_generator_cc_proto",
         ":packet_set",
         ":packet_type",
         ":port",
         ":status_handler",
+        ":status_handler_cc_proto",
+        ":stream_handler_cc_proto",
         ":subgraph",
+        ":thread_pool_executor_cc_proto",
         ":timestamp",
-        "//mediapipe/framework:calculator_cc_proto",
-        "//mediapipe/framework:packet_generator_cc_proto",
-        "//mediapipe/framework:status_handler_cc_proto",
-        "//mediapipe/framework:stream_handler_cc_proto",
-        "//mediapipe/framework:thread_pool_executor_cc_proto",
         "//mediapipe/framework/port:core_proto",
         "//mediapipe/framework/port:integral_types",
         "//mediapipe/framework/port:logging",
@@ -1203,11 +1205,11 @@ cc_test(
     name = "validated_graph_config_test",
     srcs = ["validated_graph_config_test.cc"],
     deps = [
+        ":calculator_cc_proto",
         ":calculator_framework",
         ":graph_service",
         ":graph_service_manager",
         ":validated_graph_config",
-        "//mediapipe/framework:calculator_cc_proto",
         "//mediapipe/framework/api2:node",
         "//mediapipe/framework/api2:port",
         "//mediapipe/framework/port:gtest_main",
@@ -1234,6 +1236,7 @@ cc_test(
     linkstatic = 1,
     deps = [
         ":calculator_base",
+        ":calculator_cc_proto",
         ":calculator_context",
         ":calculator_context_manager",
         ":calculator_registry",
@@ -1243,7 +1246,6 @@ cc_test(
         ":output_stream_shard",
         ":packet_set",
         ":packet_type",
-        "//mediapipe/framework:calculator_cc_proto",
         "//mediapipe/framework/port:gtest_main",
         "//mediapipe/framework/port:status",
         "//mediapipe/framework/tool:status_util",
@@ -1257,11 +1259,11 @@ cc_test(
     srcs = ["calculator_contract_test.cc"],
     linkstatic = 1,
     deps = [
+        ":calculator_cc_proto",
         ":calculator_contract",
         ":calculator_contract_test_cc_proto",
-        "//mediapipe/framework:calculator_cc_proto",
+        ":packet_generator_cc_proto",
-        "//mediapipe/framework:packet_generator_cc_proto",
+        ":status_handler_cc_proto",
-        "//mediapipe/framework:status_handler_cc_proto",
         "//mediapipe/framework/port:gtest_main",
         "//mediapipe/framework/port:parse_text_proto",
     ],
@@ -1369,6 +1371,7 @@ cc_test(
     srcs = ["calculator_context_test.cc"],
     linkstatic = 1,
     deps = [
+        ":calculator_cc_proto",
         ":calculator_context",
         ":calculator_context_manager",
         ":calculator_state",
@@ -1377,7 +1380,6 @@ cc_test(
         ":output_stream_shard",
         ":packet_set",
         ":packet_type",
-        "//mediapipe/framework:calculator_cc_proto",
         "//mediapipe/framework/port:gtest_main",
         "//mediapipe/framework/port:parse_text_proto",
         "//mediapipe/framework/port:status",
@@ -1404,6 +1406,7 @@ cc_test(
         ":executor",
         ":input_stream_handler",
         ":lifetime_tracker",
+        ":mediapipe_options_cc_proto",
         ":output_stream_poller",
         ":packet_set",
         ":packet_type",
@@ -1411,13 +1414,12 @@ cc_test(
         ":subgraph",
         ":test_calculators",
         ":thread_pool_executor",
+        ":thread_pool_executor_cc_proto",
         ":timestamp",
         ":type_map",
         "//mediapipe/calculators/core:counting_source_calculator",
         "//mediapipe/calculators/core:mux_calculator",
         "//mediapipe/calculators/core:pass_through_calculator",
-        "//mediapipe/framework:mediapipe_options_cc_proto",
-        "//mediapipe/framework:thread_pool_executor_cc_proto",
         "//mediapipe/framework/port:gtest_main",
         "//mediapipe/framework/port:logging",
         "//mediapipe/framework/port:parse_text_proto",
@@ -1469,6 +1471,7 @@ cc_test(
         "//mediapipe/framework/stream_handler:mux_input_stream_handler",
         "//mediapipe/framework/stream_handler:sync_set_input_stream_handler",
         "//mediapipe/framework/tool:sink",
+        "//mediapipe/util:packet_test_util",
         "@com_google_absl//absl/strings",
     ],
 )
@@ -1481,12 +1484,12 @@ cc_test(
     ],
     visibility = ["//visibility:public"],
     deps = [
+        ":calculator_cc_proto",
         ":calculator_framework",
         ":test_calculators",
         "//mediapipe/calculators/core:counting_source_calculator",
         "//mediapipe/calculators/core:mux_calculator",
         "//mediapipe/calculators/core:pass_through_calculator",
-        "//mediapipe/framework:calculator_cc_proto",
         "//mediapipe/framework/port:gtest_main",
         "//mediapipe/framework/port:logging",
         "//mediapipe/framework/port:parse_text_proto",
@@ -1630,8 +1633,8 @@ cc_test(
     srcs = ["packet_generator_test.cc"],
     deps = [
         ":packet_generator",
+        ":packet_generator_cc_proto",
         ":packet_type",
-        "//mediapipe/framework:packet_generator_cc_proto",
         "//mediapipe/framework/port:gtest_main",
         "//mediapipe/framework/tool:validate_type",
         "@com_google_absl//absl/strings",
@@ -1659,9 +1662,6 @@ cc_test(
         "//mediapipe/calculators/core:constant_side_packet_calculator",
         "//mediapipe/calculators/core:default_side_packet_calculator",
         "//mediapipe/calculators/core:pass_through_calculator",
-        "//mediapipe/framework:calculator_cc_proto",
-        "//mediapipe/framework:packet_generator_cc_proto",
-        "//mediapipe/framework:status_handler_cc_proto",
         "//mediapipe/framework/port:gtest_main",
         "//mediapipe/framework/port:parse_text_proto",
         "//mediapipe/framework/tool:template_parser",

mediapipe/framework/api2/builder.h

@@ -176,22 +176,50 @@ class SourceImpl {
       : SourceImpl(&GetWithAutoGrow(vec, 0)) {}
   explicit SourceImpl(SourceBase* base) : base_(base) {}
 
+  // Connects MediaPipe stream or side packet to a destination:
+  // - node input (input stream) / side input (input side packet)
+  // - graph output (output stream) / side output (output side packet).
+  //
+  // MediaPipe streams and side packets can be connected to multiple
+  // destinations. Side packets and packets added to streams are sent to all
+  // connected destinations.
   template <typename U,
             typename std::enable_if<AllowConnection<U>{}, int>::type = 0>
-  Src& AddTarget(const Dst<U>& dest) {
+  Src& ConnectTo(const Dst<U>& dest) {
     CHECK(dest.base_.source == nullptr);
     dest.base_.source = base_;
     base_->dests_.emplace_back(&dest.base_);
     return *this;
   }
+
+  // Shortcut for `ConnectTo`.
+  //
+  // Connects MediaPipe stream or side packet to a destination:
+  // - node input (input stream) / side input (input side packet)
+  // - graph output (output stream) / side output (output side packet).
+  //
+  // MediaPipe streams and side packets can be connected to multiple
+  // destinations. Side packets and packets added to streams are sent to all
+  // connected destinations.
+  template <typename U>
+  Src& operator>>(const Dst<U>& dest) {
+    return ConnectTo(dest);
+  }
+
+  template <typename U>
+  bool operator==(const SourceImpl<IsSide, U>& other) {
+    return base_ == other.base_;
+  }
+
+  template <typename U>
+  bool operator!=(const SourceImpl<IsSide, U>& other) {
+    return !(*this == other);
+  }
+
   Src& SetName(std::string name) {
     base_->name_ = std::move(name);
     return *this;
   }
-  template <typename U>
-  Src& operator>>(const Dst<U>& dest) {
-    return AddTarget(dest);
-  }
 
   template <typename U,
             std::enable_if_t<internal_builder::AllowCast<T, U>{}, int> = 0>
@@ -200,6 +228,9 @@ class SourceImpl {
   }
 
  private:
+  template <bool, typename U>
+  friend class SourceImpl;
+
   // Never null.
   SourceBase* base_;
 };
@@ -380,7 +411,7 @@ template <class Calc = internal::Generic>
 class Node;
 #if __cplusplus >= 201703L
 // Deduction guide to silence -Wctad-maybe-unsupported.
-explicit Node()->Node<internal::Generic>;
+explicit Node() -> Node<internal::Generic>;
 #endif  // C++17
 
 template <>
@@ -394,11 +425,11 @@ using GenericNode = Node<internal::Generic>;
 template <class Calc>
 class Node : public NodeBase {
  public:
-  Node() : NodeBase(Calc::kCalculatorName) {}
+  Node() : NodeBase(std::string(Calc::kCalculatorName)) {}
   // Overrides the built-in calculator type string with the provided argument.
   // Can be used to create nodes from pure interfaces.
   // TODO: only use this for pure interfaces
-  Node(const std::string& type_override) : NodeBase(type_override) {}
+  Node(std::string type_override) : NodeBase(std::move(type_override)) {}
 
   // These methods only allow access to ports declared in the contract.
   // The argument must be a tag object created with the MPP_TAG macro.

mediapipe/framework/api2/builder_test.cc

@@ -15,18 +15,32 @@
 #include "mediapipe/framework/port/parse_text_proto.h"
 #include "mediapipe/framework/port/status_matchers.h"
 
-namespace mediapipe {
+namespace mediapipe::api2::builder {
-namespace api2 {
+namespace {
-namespace test {
+
+using ::mediapipe::api2::test::Bar;
+using ::mediapipe::api2::test::FloatAdder;
+using ::mediapipe::api2::test::Foo;
+using ::mediapipe::api2::test::Foo2;
+using ::mediapipe::api2::test::FooBar1;
 
 TEST(BuilderTest, BuildGraph) {
-  builder::Graph graph;
+  Graph graph;
+  // Graph inputs.
+  Stream<AnyType> base = graph.In("IN").SetName("base");
+  SidePacket<AnyType> side = graph.SideIn("SIDE").SetName("side");
+
   auto& foo = graph.AddNode("Foo");
+  base >> foo.In("BASE");
+  side >> foo.SideIn("SIDE");
+  Stream<AnyType> foo_out = foo.Out("OUT");
+
   auto& bar = graph.AddNode("Bar");
-  graph.In("IN").SetName("base") >> foo.In("BASE");
+  foo_out >> bar.In("IN");
-  graph.SideIn("SIDE").SetName("side") >> foo.SideIn("SIDE");
+  Stream<AnyType> bar_out = bar.Out("OUT");
-  foo.Out("OUT") >> bar.In("IN");
+
-  bar.Out("OUT").SetName("out") >> graph.Out("OUT");
+  // Graph outputs.
+  bar_out.SetName("out") >> graph.Out("OUT");
 
   CalculatorGraphConfig expected =
       mediapipe::ParseTextProtoOrDie<CalculatorGraphConfig>(R"pb(
@@ -48,23 +62,20 @@ TEST(BuilderTest, BuildGraph) {
   EXPECT_THAT(graph.GetConfig(), EqualsProto(expected));
 }
 
-TEST(BuilderTest, CopyableSource) {
+TEST(BuilderTest, CopyableStream) {
-  builder::Graph graph;
+  Graph graph;
-  builder::Source<int> a = graph[Input<int>("A")];
+  Stream<int> a = graph.In("A").SetName("a").Cast<int>();
-  a.SetName("a");
+  Stream<int> b = graph.In("B").SetName("b").Cast<int>();
-  builder::Source<int> b = graph[Input<int>("B")];
+  SidePacket<float> side_a =
-  b.SetName("b");
+      graph.SideIn("SIDE_A").SetName("side_a").Cast<float>();
-  builder::SideSource<float> side_a = graph[SideInput<float>("SIDE_A")];
+  SidePacket<float> side_b =
-  side_a.SetName("side_a");
+      graph.SideIn("SIDE_B").SetName("side_b").Cast<float>();
-  builder::SideSource<float> side_b = graph[SideInput<float>("SIDE_B")];
+  Destination<int> out = graph.Out("OUT").Cast<int>();
-  side_b.SetName("side_b");
+  SideDestination<float> side_out = graph.SideOut("SIDE_OUT").Cast<float>();
-  builder::Destination<int> out = graph[Output<int>("OUT")];
-  builder::SideDestination<float> side_out =
-      graph[SideOutput<float>("SIDE_OUT")];
 
-  builder::Source<int> input = a;
+  Stream<int> input = a;
   input = b;
-  builder::SideSource<float> side_input = side_b;
+  SidePacket<float> side_input = side_b;
   side_input = side_a;
 
   input >> out;
@@ -83,31 +94,29 @@ TEST(BuilderTest, CopyableSource) {
 }
 
 TEST(BuilderTest, BuildGraphWithFunctions) {
-  builder::Graph graph;
+  Graph graph;
 
-  builder::Source<int> base = graph[Input<int>("IN")];
+  // Graph inputs.
-  base.SetName("base");
+  Stream<int> base = graph.In("IN").SetName("base").Cast<int>();
-  builder::SideSource<float> side = graph[SideInput<float>("SIDE")];
+  SidePacket<float> side = graph.SideIn("SIDE").SetName("side").Cast<float>();
-  side.SetName("side");
 
-  auto foo_fn = [](builder::Source<int> base, builder::SideSource<float> side,
+  auto foo_fn = [](Stream<int> base, SidePacket<float> side, Graph& graph) {
-                   builder::Graph& graph) {
     auto& foo = graph.AddNode("Foo");
-    base >> foo[Input<int>("BASE")];
+    base >> foo.In("BASE");
-    side >> foo[SideInput<float>("SIDE")];
+    side >> foo.SideIn("SIDE");
-    return foo[Output<double>("OUT")];
+    return foo.Out("OUT")[0].Cast<double>();
   };
-  builder::Source<double> foo_out = foo_fn(base, side, graph);
+  Stream<double> foo_out = foo_fn(base, side, graph);
 
-  auto bar_fn = [](builder::Source<double> in, builder::Graph& graph) {
+  auto bar_fn = [](Stream<double> in, Graph& graph) {
     auto& bar = graph.AddNode("Bar");
-    in >> bar[Input<double>("IN")];
+    in >> bar.In("IN");
-    return bar[Output<double>("OUT")];
+    return bar.Out("OUT")[0].Cast<double>();
   };
-  builder::Source<double> bar_out = bar_fn(foo_out, graph);
+  Stream<double> bar_out = bar_fn(foo_out, graph);
-  bar_out.SetName("out");
 
-  bar_out >> graph[Output<double>("OUT")];
+  // Graph outputs.
+  bar_out.SetName("out") >> graph.Out("OUT");
 
   CalculatorGraphConfig expected =
       mediapipe::ParseTextProtoOrDie<CalculatorGraphConfig>(R"pb(
@@ -131,13 +140,22 @@ TEST(BuilderTest, BuildGraphWithFunctions) {
 
 template <class FooT>
 void BuildGraphTypedTest() {
-  builder::Graph graph;
+  Graph graph;
+  // Graph inputs.
+  Stream<AnyType> base = graph.In("IN").SetName("base");
+  SidePacket<AnyType> side = graph.SideIn("SIDE").SetName("side");
+
   auto& foo = graph.AddNode<FooT>();
+  base >> foo.In(MPP_TAG("BASE"));
+  side >> foo.SideIn(MPP_TAG("BIAS"));
+  Stream<float> foo_out = foo.Out(MPP_TAG("OUT"));
+
   auto& bar = graph.AddNode<Bar>();
-  graph.In("IN").SetName("base") >> foo.In(MPP_TAG("BASE"));
+  foo_out >> bar.In(MPP_TAG("IN"));
-  graph.SideIn("SIDE").SetName("side") >> foo.SideIn(MPP_TAG("BIAS"));
+  Stream<AnyType> bar_out = bar.Out(MPP_TAG("OUT"));
-  foo.Out(MPP_TAG("OUT")) >> bar.In(MPP_TAG("IN"));
+
-  bar.Out(MPP_TAG("OUT")).SetName("out") >> graph.Out("OUT");
+  // Graph outputs.
+  bar_out.SetName("out") >> graph.Out("OUT");
 
   CalculatorGraphConfig expected =
       mediapipe::ParseTextProtoOrDie<CalculatorGraphConfig>(
@@ -161,18 +179,26 @@ void BuildGraphTypedTest() {
   EXPECT_THAT(graph.GetConfig(), EqualsProto(expected));
 }
 
-TEST(BuilderTest, BuildGraphTyped) { BuildGraphTypedTest<Foo>(); }
+TEST(BuilderTest, BuildGraphTyped) { BuildGraphTypedTest<test::Foo>(); }
 
-TEST(BuilderTest, BuildGraphTyped2) { BuildGraphTypedTest<Foo2>(); }
+TEST(BuilderTest, BuildGraphTyped2) { BuildGraphTypedTest<test::Foo2>(); }
 
 TEST(BuilderTest, FanOut) {
-  builder::Graph graph;
+  Graph graph;
+  // Graph inputs.
+  Stream<AnyType> base = graph.In("IN").SetName("base");
+
   auto& foo = graph.AddNode("Foo");
+  base >> foo.In("BASE");
+  Stream<AnyType> foo_out = foo.Out("OUT");
+
   auto& adder = graph.AddNode("FloatAdder");
-  graph.In("IN").SetName("base") >> foo.In("BASE");
+  foo_out >> adder.In("IN")[0];
-  foo.Out("OUT") >> adder.In("IN")[0];
+  foo_out >> adder.In("IN")[1];
-  foo.Out("OUT") >> adder.In("IN")[1];
+  Stream<AnyType> out = adder.Out("OUT");
-  adder.Out("OUT").SetName("out") >> graph.Out("OUT");
+
+  // Graph outputs.
+  out.SetName("out") >> graph.Out("OUT");
 
   CalculatorGraphConfig expected =
       mediapipe::ParseTextProtoOrDie<CalculatorGraphConfig>(R"pb(
@@ -194,13 +220,21 @@ TEST(BuilderTest, FanOut) {
 }
 
 TEST(BuilderTest, TypedMultiple) {
-  builder::Graph graph;
+  Graph graph;
+  // Graph inputs.
+  Stream<AnyType> base = graph.In("IN").SetName("base");
+
   auto& foo = graph.AddNode<Foo>();
+  base >> foo.In(MPP_TAG("BASE"));
+  Stream<float> foo_out = foo.Out(MPP_TAG("OUT"));
+
   auto& adder = graph.AddNode<FloatAdder>();
-  graph.In("IN").SetName("base") >> foo.In(MPP_TAG("BASE"));
+  foo_out >> adder.In(MPP_TAG("IN"))[0];
-  foo.Out(MPP_TAG("OUT")) >> adder.In(MPP_TAG("IN"))[0];
+  foo_out >> adder.In(MPP_TAG("IN"))[1];
-  foo.Out(MPP_TAG("OUT")) >> adder.In(MPP_TAG("IN"))[1];
+  Stream<float> out = adder.Out(MPP_TAG("OUT"));
-  adder.Out(MPP_TAG("OUT")).SetName("out") >> graph.Out("OUT");
+
+  // Graph outputs.
+  out.SetName("out") >> graph.Out("OUT");
 
   CalculatorGraphConfig expected =
       mediapipe::ParseTextProtoOrDie<CalculatorGraphConfig>(R"pb(
@@ -222,14 +256,21 @@ TEST(BuilderTest, TypedMultiple) {
 }
 
 TEST(BuilderTest, TypedByPorts) {
-  builder::Graph graph;
+  Graph graph;
-  auto& foo = graph.AddNode<Foo>();
+  // Graph inputs.
-  auto& adder = graph.AddNode<FloatAdder>();
+  Stream<int> base = graph.In(FooBar1::kIn).SetName("base");
 
-  graph[FooBar1::kIn].SetName("base") >> foo[Foo::kBase];
+  auto& foo = graph.AddNode<test::Foo>();
-  foo[Foo::kOut] >> adder[FloatAdder::kIn][0];
+  base >> foo[Foo::kBase];
-  foo[Foo::kOut] >> adder[FloatAdder::kIn][1];
+  Stream<float> foo_out = foo[Foo::kOut];
-  adder[FloatAdder::kOut].SetName("out") >> graph[FooBar1::kOut];
+
+  auto& adder = graph.AddNode<FloatAdder>();
+  foo_out >> adder[FloatAdder::kIn][0];
+  foo_out >> adder[FloatAdder::kIn][1];
+  Stream<float> out = adder[FloatAdder::kOut];
+
+  // Graph outputs.
+  out.SetName("out") >> graph.Out(FooBar1::kOut);
 
   CalculatorGraphConfig expected =
       mediapipe::ParseTextProtoOrDie<CalculatorGraphConfig>(R"pb(
@@ -251,10 +292,16 @@ TEST(BuilderTest, TypedByPorts) {
 }
 
 TEST(BuilderTest, PacketGenerator) {
-  builder::Graph graph;
+  Graph graph;
+  // Graph inputs.
+  SidePacket<AnyType> side_in = graph.SideIn("IN");
+
   auto& generator = graph.AddPacketGenerator("FloatGenerator");
-  graph.SideIn("IN") >> generator.SideIn("IN");
+  side_in >> generator.SideIn("IN");
-  generator.SideOut("OUT") >> graph.SideOut("OUT");
+  SidePacket<AnyType> side_out = generator.SideOut("OUT");
+
+  // Graph outputs.
+  side_out >> graph.SideOut("OUT");
 
   CalculatorGraphConfig expected =
       mediapipe::ParseTextProtoOrDie<CalculatorGraphConfig>(R"pb(
@@ -270,13 +317,22 @@ TEST(BuilderTest, PacketGenerator) {
 }
 
 TEST(BuilderTest, EmptyTag) {
-  builder::Graph graph;
+  Graph graph;
+  // Graph inputs.
+  Stream<AnyType> a = graph.In("A").SetName("a");
+  Stream<AnyType> c = graph.In("C").SetName("c");
+  Stream<AnyType> b = graph.In("B").SetName("b");
+
   auto& foo = graph.AddNode("Foo");
-  graph.In("A").SetName("a") >> foo.In("")[0];
+  a >> foo.In("")[0];
-  graph.In("C").SetName("c") >> foo.In("")[2];
+  c >> foo.In("")[2];
-  graph.In("B").SetName("b") >> foo.In("")[1];
+  b >> foo.In("")[1];
-  foo.Out("")[0].SetName("x") >> graph.Out("ONE");
+  Stream<AnyType> x = foo.Out("")[0];
-  foo.Out("")[1].SetName("y") >> graph.Out("TWO");
+  Stream<AnyType> y = foo.Out("")[1];
+
+  // Graph outputs.
+  x.SetName("x") >> graph.Out("ONE");
+  y.SetName("y") >> graph.Out("TWO");
 
   CalculatorGraphConfig expected =
       mediapipe::ParseTextProtoOrDie<CalculatorGraphConfig>(R"pb(
@@ -302,11 +358,18 @@ TEST(BuilderTest, StringLikeTags) {
   const std::string kB = "B";
   constexpr absl::string_view kC = "C";
 
-  builder::Graph graph;
+  Graph graph;
+  // Graph inputs.
+  Stream<AnyType> a = graph.In(kA).SetName("a");
+  Stream<AnyType> b = graph.In(kB).SetName("b");
+
   auto& foo = graph.AddNode("Foo");
-  graph.In(kA).SetName("a") >> foo.In(kA);
+  a >> foo.In(kA);
-  graph.In(kB).SetName("b") >> foo.In(kB);
+  b >> foo.In(kB);
-  foo.Out(kC).SetName("c") >> graph.Out(kC);
+  Stream<AnyType> c = foo.Out(kC);
+
+  // Graph outputs.
+  c.SetName("c") >> graph.Out(kC);
 
   CalculatorGraphConfig expected =
       mediapipe::ParseTextProtoOrDie<CalculatorGraphConfig>(R"pb(
@@ -324,13 +387,22 @@ TEST(BuilderTest, StringLikeTags) {
 }
 
 TEST(BuilderTest, GraphIndexes) {
-  builder::Graph graph;
+  Graph graph;
+  // Graph inputs.
+  Stream<AnyType> a = graph.In(0).SetName("a");
+  Stream<AnyType> c = graph.In(1).SetName("c");
+  Stream<AnyType> b = graph.In(2).SetName("b");
+
   auto& foo = graph.AddNode("Foo");
-  graph.In(0).SetName("a") >> foo.In("")[0];
+  a >> foo.In("")[0];
-  graph.In(1).SetName("c") >> foo.In("")[2];
+  c >> foo.In("")[2];
-  graph.In(2).SetName("b") >> foo.In("")[1];
+  b >> foo.In("")[1];
-  foo.Out("")[0].SetName("x") >> graph.Out(1);
+  Stream<AnyType> x = foo.Out("")[0];
-  foo.Out("")[1].SetName("y") >> graph.Out(0);
+  Stream<AnyType> y = foo.Out("")[1];
+
+  // Graph outputs.
+  x.SetName("x") >> graph.Out(1);
+  y.SetName("y") >> graph.Out(0);
 
   CalculatorGraphConfig expected =
       mediapipe::ParseTextProtoOrDie<CalculatorGraphConfig>(R"pb(
@@ -376,29 +448,27 @@ class AnyAndSameTypeCalculator : public NodeIntf {
 };
 
 TEST(BuilderTest, AnyAndSameTypeHandledProperly) {
-  builder::Graph graph;
+  Graph graph;
-  builder::Source<AnyType> any_input = graph[Input<AnyType>{"GRAPH_ANY_INPUT"}];
+  Stream<AnyType> any_input = graph.In("GRAPH_ANY_INPUT");
-  builder::Source<int> int_input = graph[Input<int>{"GRAPH_INT_INPUT"}];
+  Stream<int> int_input = graph.In("GRAPH_INT_INPUT").Cast<int>();
 
   auto& node = graph.AddNode("AnyAndSameTypeCalculator");
   any_input >> node[AnyAndSameTypeCalculator::kAnyTypeInput];
   int_input >> node[AnyAndSameTypeCalculator::kIntInput];
-
+  Stream<AnyType> any_type_output =
-  builder::Source<AnyType> any_type_output =
       node[AnyAndSameTypeCalculator::kAnyTypeOutput];
-  any_type_output.SetName("any_type_output");
+  Stream<AnyType> same_type_output =
-
-  builder::Source<AnyType> same_type_output =
       node[AnyAndSameTypeCalculator::kSameTypeOutput];
-  same_type_output.SetName("same_type_output");
+  Stream<AnyType> recursive_same_type_output =
-  builder::Source<AnyType> recursive_same_type_output =
       node[AnyAndSameTypeCalculator::kRecursiveSameTypeOutput];
-  recursive_same_type_output.SetName("recursive_same_type_output");
+  Stream<int> same_int_output = node[AnyAndSameTypeCalculator::kSameIntOutput];
-  builder::Source<int> same_int_output =
+  Stream<int> recursive_same_int_type_output =
-      node[AnyAndSameTypeCalculator::kSameIntOutput];
-  same_int_output.SetName("same_int_output");
-  builder::Source<int> recursive_same_int_type_output =
       node[AnyAndSameTypeCalculator::kRecursiveSameIntOutput];
+
+  any_type_output.SetName("any_type_output");
+  same_type_output.SetName("same_type_output");
+  recursive_same_type_output.SetName("recursive_same_type_output");
+  same_int_output.SetName("same_int_output");
   recursive_same_int_type_output.SetName("recursive_same_int_type_output");
 
   CalculatorGraphConfig expected = mediapipe::ParseTextProtoOrDie<
@@ -420,17 +490,17 @@ TEST(BuilderTest, AnyAndSameTypeHandledProperly) {
 }
 
 TEST(BuilderTest, AnyTypeCanBeCast) {
-  builder::Graph graph;
+  Graph graph;
-  builder::Source<std::string> any_input =
+  Stream<std::string> any_input =
       graph.In("GRAPH_ANY_INPUT").Cast<std::string>();
 
   auto& node = graph.AddNode("AnyAndSameTypeCalculator");
   any_input >> node[AnyAndSameTypeCalculator::kAnyTypeInput];
-  builder::Source<double> any_type_output =
+  Stream<double> any_type_output =
       node[AnyAndSameTypeCalculator::kAnyTypeOutput].Cast<double>();
-  any_type_output.SetName("any_type_output");
 
-  any_type_output >> graph.Out("GRAPH_ANY_OUTPUT").Cast<double>();
+  any_type_output.SetName("any_type_output") >>
+      graph.Out("GRAPH_ANY_OUTPUT").Cast<double>();
 
   CalculatorGraphConfig expected =
       mediapipe::ParseTextProtoOrDie<CalculatorGraphConfig>(R"pb(
@@ -446,11 +516,11 @@ TEST(BuilderTest, AnyTypeCanBeCast) {
 }
 
 TEST(BuilderTest, MultiPortIsCastToMultiPort) {
-  builder::Graph graph;
+  Graph graph;
-  builder::MultiSource<AnyType> any_input = graph.In("ANY_INPUT");
+  MultiSource<AnyType> any_input = graph.In("ANY_INPUT");
-  builder::MultiSource<int> int_input = any_input.Cast<int>();
+  MultiSource<int> int_input = any_input.Cast<int>();
-  builder::MultiDestination<AnyType> any_output = graph.Out("ANY_OUTPUT");
+  MultiDestination<AnyType> any_output = graph.Out("ANY_OUTPUT");
-  builder::MultiDestination<int> int_output = any_output.Cast<int>();
+  MultiDestination<int> int_output = any_output.Cast<int>();
   int_input >> int_output;
 
   CalculatorGraphConfig expected =
@@ -462,11 +532,11 @@ TEST(BuilderTest, MultiPortIsCastToMultiPort) {
 }
 
 TEST(BuilderTest, MultiPortCanBeSlicedToSinglePort) {
-  builder::Graph graph;
+  Graph graph;
-  builder::MultiSource<AnyType> any_multi_input = graph.In("ANY_INPUT");
+  MultiSource<AnyType> any_multi_input = graph.In("ANY_INPUT");
-  builder::Source<AnyType> any_input = any_multi_input;
+  Stream<AnyType> any_input = any_multi_input;
-  builder::MultiDestination<AnyType> any_multi_output = graph.Out("ANY_OUTPUT");
+  MultiDestination<AnyType> any_multi_output = graph.Out("ANY_OUTPUT");
-  builder::Destination<AnyType> any_output = any_multi_output;
+  Destination<AnyType> any_output = any_multi_output;
   any_input >> any_output;
 
   CalculatorGraphConfig expected =
@@ -478,11 +548,11 @@ TEST(BuilderTest, MultiPortCanBeSlicedToSinglePort) {
 }
 
 TEST(BuilderTest, SinglePortAccessWorksThroughSlicing) {
-  builder::Graph graph;
+  Graph graph;
-  builder::Source<int> int_input = graph.In("INT_INPUT").Cast<int>();
+  Stream<int> int_input = graph.In("INT_INPUT").Cast<int>();
-  builder::Source<AnyType> any_input = graph.In("ANY_OUTPUT");
+  Stream<AnyType> any_input = graph.In("ANY_OUTPUT");
-  builder::Destination<int> int_output = graph.Out("INT_OUTPUT").Cast<int>();
+  Destination<int> int_output = graph.Out("INT_OUTPUT").Cast<int>();
-  builder::Destination<AnyType> any_output = graph.Out("ANY_OUTPUT");
+  Destination<AnyType> any_output = graph.Out("ANY_OUTPUT");
   int_input >> int_output;
   any_input >> any_output;
 
@@ -496,6 +566,51 @@ TEST(BuilderTest, SinglePortAccessWorksThroughSlicing) {
   EXPECT_THAT(graph.GetConfig(), EqualsProto(expected));
 }
 
-}  // namespace test
+TEST(BuilderTest, TestStreamEqualsNotEqualsOperators) {
-}  // namespace api2
+  Graph graph;
-}  // namespace mediapipe
+  Stream<AnyType> input0 = graph.In(0);
+  EXPECT_TRUE(input0 == input0);
+  EXPECT_FALSE(input0 != input0);
+
+  EXPECT_TRUE(input0 == input0.Cast<int>());
+  EXPECT_FALSE(input0.Cast<float>() != input0);
+
+  EXPECT_TRUE(input0.Cast<float>() == input0.Cast<int>());
+  EXPECT_FALSE(input0.Cast<float>() != input0.Cast<int>());
+
+  Stream<AnyType> input1 = graph.In(1);
+  EXPECT_FALSE(input0 == input1);
+  EXPECT_TRUE(input0 != input1);
+
+  input1 = input0;
+  EXPECT_TRUE(input0 == input1);
+  EXPECT_FALSE(input0 != input1);
+  EXPECT_TRUE(input0.Cast<int>() == input1.Cast<int>());
+  EXPECT_FALSE(input0.Cast<float>() != input1.Cast<float>());
+}
+
+TEST(BuilderTest, TestSidePacketEqualsNotEqualsOperators) {
+  Graph graph;
+  SidePacket<AnyType> side_input0 = graph.SideIn(0);
+  EXPECT_TRUE(side_input0 == side_input0);
+  EXPECT_FALSE(side_input0 != side_input0);
+
+  EXPECT_TRUE(side_input0 == side_input0.Cast<int>());
+  EXPECT_FALSE(side_input0.Cast<float>() != side_input0);
+
+  EXPECT_TRUE(side_input0.Cast<float>() == side_input0.Cast<int>());
+  EXPECT_FALSE(side_input0.Cast<float>() != side_input0.Cast<int>());
+
+  SidePacket<AnyType> side_input1 = graph.SideIn(1);
+  EXPECT_FALSE(side_input0 == side_input1);
+  EXPECT_TRUE(side_input0 != side_input1);
+
+  side_input1 = side_input0;
+  EXPECT_TRUE(side_input0 == side_input1);
+  EXPECT_FALSE(side_input0 != side_input1);
+  EXPECT_TRUE(side_input0.Cast<int>() == side_input1.Cast<int>());
+  EXPECT_FALSE(side_input0.Cast<float>() != side_input1.Cast<float>());
+}
+
+}  // namespace
+}  // namespace mediapipe::api2::builder

mediapipe/framework/api2/packet.h

@@ -181,7 +181,7 @@ template <typename T = internal::Generic>
 class Packet;
 #if __cplusplus >= 201703L
 // Deduction guide to silence -Wctad-maybe-unsupported.
-explicit Packet()->Packet<internal::Generic>;
+explicit Packet() -> Packet<internal::Generic>;
 #endif  // C++17
 
 template <>