Project import generated by Copybara.

GitOrigin-RevId: 852dfb05d450167899c0dd5ef7c45622a12e865b

README.md

@@ -1,7 +1,7 @@
 ![MediaPipe](mediapipe/docs/images/mediapipe_small.png?raw=true "MediaPipe logo")
 =======================================================================
 
-[MediaPipe](http://mediapipe.dev) is a framework for building multimodal (eg. video, audio, any time series data) applied ML pipelines. With MediaPipe, a perception pipeline can be built as a graph of modular components, including, for instance, inference models (e.g., TensorFlow, TFLite) and media processing functions.
+[MediaPipe](http://mediapipe.dev) is a framework for building multimodal (eg. video, audio, any time series data), cross platform (i.e Android, iOS, web, edge devices) applied ML pipelines. With MediaPipe, a perception pipeline can be built as a graph of modular components, including, for instance, inference models (e.g., TensorFlow, TFLite) and media processing functions.
 
 ![Real-time Face Detection](mediapipe/docs/images/realtime_face_detection.gif)
 
@@ -9,17 +9,17 @@
 
 ## ML Solutions in MediaPipe
 
-* [Hand Tracking](mediapipe/docs/hand_tracking_mobile_gpu.md)
+* [Face Detection](mediapipe/docs/face_detection_mobile_gpu.md) [[Web Demo]](https://viz.mediapipe.dev/runner/demos/face_detection/face_detection.html)
 * [Multi-hand Tracking](mediapipe/docs/multi_hand_tracking_mobile_gpu.md)
-* [Face Detection](mediapipe/docs/face_detection_mobile_gpu.md)
+* [Hand Tracking](mediapipe/docs/hand_tracking_mobile_gpu.md) [[Web Demo]](https://viz.mediapipe.dev/runner/demos/hand_tracking/hand_tracking.html)
-* [Hair Segmentation](mediapipe/docs/hair_segmentation_mobile_gpu.md)
+* [Hair Segmentation](mediapipe/docs/hair_segmentation_mobile_gpu.md) [[Web Demo]](https://viz.mediapipe.dev/runner/demos/hair_segmentation/hair_segmentation.html)
 * [Object Detection](mediapipe/docs/object_detection_mobile_gpu.md)
 * [Object Detection and Tracking](mediapipe/docs/object_tracking_mobile_gpu.md)
 * [AutoFlip](mediapipe/docs/autoflip.md)
 
-![hand_tracking](mediapipe/docs/images/mobile/hand_tracking_3d_android_gpu_small.gif)
-![multi-hand_tracking](mediapipe/docs/images/mobile/multi_hand_tracking_android_gpu_small.gif)
 ![face_detection](mediapipe/docs/images/mobile/face_detection_android_gpu_small.gif)
+![multi-hand_tracking](mediapipe/docs/images/mobile/multi_hand_tracking_android_gpu_small.gif)
+![hand_tracking](mediapipe/docs/images/mobile/hand_tracking_3d_android_gpu_small.gif)
 ![hair_segmentation](mediapipe/docs/images/mobile/hair_segmentation_android_gpu_small.gif)
 ![object_tracking](mediapipe/docs/images/mobile/object_tracking_android_gpu_small.gif)
 
@@ -29,6 +29,8 @@ Follow these [instructions](mediapipe/docs/install.md).
 ## Getting started
 See mobile, desktop and Google Coral [examples](mediapipe/docs/examples.md).
 
+Check out some web demos [[Edge detection]](https://viz.mediapipe.dev/runner/demos/edge_detection/edge_detection.html) [[Face detection]](https://viz.mediapipe.dev/runner/demos/face_detection/face_detection.html) [[Hand Tracking]](https://viz.mediapipe.dev/runner/demos/hand_tracking/hand_tracking.html)
+
 ## Documentation
 [MediaPipe Read-the-Docs](https://mediapipe.readthedocs.io/) or [docs.mediapipe.dev](https://docs.mediapipe.dev)
 
@@ -37,10 +39,12 @@ Check out the [Examples page](https://mediapipe.readthedocs.io/en/latest/example
 ## Visualizing MediaPipe graphs
 A web-based visualizer is hosted on [viz.mediapipe.dev](https://viz.mediapipe.dev/). Please also see instructions [here](mediapipe/docs/visualizer.md).
 
-## Community forum
+## Videos
-*  [Discuss](https://groups.google.com/forum/#!forum/mediapipe) - General community discussion around MediaPipe
+*  [YouTube Channel](https://www.youtube.com/channel/UCObqmpuSMx-usADtL_qdMAw)
 
 ## Publications
+* [Google Developer Blog: MediaPipe on the Web](https://mediapipe.page.link/webdevblog)
+* [Google Developer Blog: Object Detection and Tracking using MediaPipe](https://mediapipe.page.link/objecttrackingblog)
 * [On-Device, Real-Time Hand Tracking with MediaPipe](https://ai.googleblog.com/2019/08/on-device-real-time-hand-tracking-with.html)
 * [MediaPipe: A Framework for Building Perception Pipelines](https://arxiv.org/abs/1906.08172)
 
@@ -55,6 +59,9 @@ A web-based visualizer is hosted on [viz.mediapipe.dev](https://viz.mediapipe.de
 * [Google Industry Workshop at ICIP 2019](http://2019.ieeeicip.org/?action=page4&id=14#Google) [Presentation](https://docs.google.com/presentation/d/e/2PACX-1vRIBBbO_LO9v2YmvbHHEt1cwyqH6EjDxiILjuT0foXy1E7g6uyh4CesB2DkkEwlRDO9_lWfuKMZx98T/pub?start=false&loop=false&delayms=3000&slide=id.g556cc1a659_0_5) on Sept 24 in Taipei, Taiwan
 * [Open sourced at CVPR 2019](https://sites.google.com/corp/view/perception-cv4arvr/mediapipe) on June 17~20 in Long Beach, CA
 
+## Community forum
+*  [Discuss](https://groups.google.com/forum/#!forum/mediapipe) - General community discussion around MediaPipe
+
 ## Alpha Disclaimer
 MediaPipe is currently in alpha for v0.6. We are still making breaking API changes and expect to get to stable API by v1.0.
 

WORKSPACE

@@ -78,6 +78,14 @@ http_archive(
     ],
 )
 
+# easyexif
+http_archive(
+    name = "easyexif",
+    url = "https://github.com/mayanklahiri/easyexif/archive/master.zip",
+    strip_prefix = "easyexif-master",
+    build_file = "@//third_party:easyexif.BUILD",
+)
+
 # libyuv
 http_archive(
     name = "libyuv",

mediapipe/calculators/core/BUILD

@@ -86,6 +86,15 @@ proto_library(
     ],
 )
 
+proto_library(
+    name = "constant_side_packet_calculator_proto",
+    srcs = ["constant_side_packet_calculator.proto"],
+    visibility = ["//visibility:public"],
+    deps = [
+        "//mediapipe/framework:calculator_proto",
+    ],
+)
+
 proto_library(
     name = "clip_vector_size_calculator_proto",
     srcs = ["clip_vector_size_calculator.proto"],
@@ -173,6 +182,14 @@ mediapipe_cc_proto_library(
     deps = [":gate_calculator_proto"],
 )
 
+mediapipe_cc_proto_library(
+    name = "constant_side_packet_calculator_cc_proto",
+    srcs = ["constant_side_packet_calculator.proto"],
+    cc_deps = ["//mediapipe/framework:calculator_cc_proto"],
+    visibility = ["//visibility:public"],
+    deps = [":constant_side_packet_calculator_proto"],
+)
+
 cc_library(
     name = "add_header_calculator",
     srcs = ["add_header_calculator.cc"],
@@ -960,3 +977,30 @@ cc_test(
         "@com_google_absl//absl/memory",
     ],
 )
+
+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",
+        "//mediapipe/framework:collection_item_id",
+        "//mediapipe/framework/port:ret_check",
+        "//mediapipe/framework/port:status",
+    ],
+    alwayslink = 1,
+)
+
+cc_test(
+    name = "constant_side_packet_calculator_test",
+    srcs = ["constant_side_packet_calculator_test.cc"],
+    deps = [
+        ":constant_side_packet_calculator",
+        "//mediapipe/framework:calculator_framework",
+        "//mediapipe/framework/port:gtest_main",
+        "//mediapipe/framework/port:parse_text_proto",
+        "//mediapipe/framework/port:status",
+        "@com_google_absl//absl/strings",
+    ],
+)

mediapipe/calculators/core/constant_side_packet_calculator.cc

@@ -0,0 +1,116 @@
+// Copyright 2020 The MediaPipe Authors.
+//
+// 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 <string>
+
+#include "mediapipe/calculators/core/constant_side_packet_calculator.pb.h"
+#include "mediapipe/framework/calculator_framework.h"
+#include "mediapipe/framework/collection_item_id.h"
+#include "mediapipe/framework/port/canonical_errors.h"
+#include "mediapipe/framework/port/ret_check.h"
+#include "mediapipe/framework/port/status.h"
+
+namespace mediapipe {
+
+// Generates an output side packet or multiple output side packets according to
+// the specified options.
+//
+// Example configs:
+// node {
+//   calculator: "ConstantSidePacketCalculator"
+//   output_side_packet: "PACKET:packet"
+//   options: {
+//     [mediapipe.ConstantSidePacketCalculatorOptions.ext]: {
+//       packet { int_value: 2 }
+//     }
+//   }
+// }
+//
+// node {
+//   calculator: "ConstantSidePacketCalculator"
+//   output_side_packet: "PACKET:0:int_packet"
+//   output_side_packet: "PACKET:1:bool_packet"
+//   options: {
+//     [mediapipe.ConstantSidePacketCalculatorOptions.ext]: {
+//       packet { int_value: 2 }
+//       packet { bool_value: true }
+//     }
+//   }
+// }
+class ConstantSidePacketCalculator : public CalculatorBase {
+ public:
+  static ::mediapipe::Status GetContract(CalculatorContract* cc) {
+    const auto& options = cc->Options().GetExtension(
+        ::mediapipe::ConstantSidePacketCalculatorOptions::ext);
+    RET_CHECK_EQ(cc->OutputSidePackets().NumEntries(kPacketTag),
+                 options.packet_size())
+        << "Number of output side packets has to be same as number of packets "
+           "configured in options.";
+
+    int index = 0;
+    for (CollectionItemId id = cc->OutputSidePackets().BeginId(kPacketTag);
+         id != cc->OutputSidePackets().EndId(kPacketTag); ++id, ++index) {
+      const auto& packet_options = options.packet(index);
+      auto& packet = cc->OutputSidePackets().Get(id);
+      if (packet_options.has_int_value()) {
+        packet.Set<int>();
+      } else if (packet_options.has_float_value()) {
+        packet.Set<float>();
+      } else if (packet_options.has_bool_value()) {
+        packet.Set<bool>();
+      } else if (packet_options.has_string_value()) {
+        packet.Set<std::string>();
+      } else {
+        return ::mediapipe::InvalidArgumentError(
+            "None of supported values were specified in options.");
+      }
+    }
+    return ::mediapipe::OkStatus();
+  }
+
+  ::mediapipe::Status Open(CalculatorContext* cc) override {
+    const auto& options = cc->Options().GetExtension(
+        ::mediapipe::ConstantSidePacketCalculatorOptions::ext);
+    int index = 0;
+    for (CollectionItemId id = cc->OutputSidePackets().BeginId(kPacketTag);
+         id != cc->OutputSidePackets().EndId(kPacketTag); ++id, ++index) {
+      auto& packet = cc->OutputSidePackets().Get(id);
+      const auto& packet_options = options.packet(index);
+      if (packet_options.has_int_value()) {
+        packet.Set(MakePacket<int>(packet_options.int_value()));
+      } else if (packet_options.has_float_value()) {
+        packet.Set(MakePacket<float>(packet_options.float_value()));
+      } else if (packet_options.has_bool_value()) {
+        packet.Set(MakePacket<bool>(packet_options.bool_value()));
+      } else if (packet_options.has_string_value()) {
+        packet.Set(MakePacket<std::string>(packet_options.string_value()));
+      } else {
+        return ::mediapipe::InvalidArgumentError(
+            "None of supported values were specified in options.");
+      }
+    }
+    return ::mediapipe::OkStatus();
+  }
+
+  ::mediapipe::Status Process(CalculatorContext* cc) override {
+    return ::mediapipe::OkStatus();
+  }
+
+ private:
+  static constexpr const char* kPacketTag = "PACKET";
+};
+
+REGISTER_CALCULATOR(ConstantSidePacketCalculator);
+
+}  // namespace mediapipe

mediapipe/calculators/core/constant_side_packet_calculator.proto

@@ -0,0 +1,36 @@
+// Copyright 2020 The MediaPipe Authors.
+//
+// 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.
+
+syntax = "proto2";
+
+package mediapipe;
+
+import "mediapipe/framework/calculator.proto";
+
+message ConstantSidePacketCalculatorOptions {
+  extend CalculatorOptions {
+    optional ConstantSidePacketCalculatorOptions ext = 291214597;
+  }
+
+  message ConstantSidePacket {
+    oneof value {
+      int32 int_value = 1;
+      float float_value = 2;
+      bool bool_value = 3;
+      string string_value = 4;
+    }
+  }
+
+  repeated ConstantSidePacket packet = 1;
+}

mediapipe/calculators/core/constant_side_packet_calculator_test.cc

@@ -0,0 +1,196 @@
+// Copyright 2020 The MediaPipe Authors.
+//
+// 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 <string>
+
+#include "absl/strings/string_view.h"
+#include "absl/strings/substitute.h"
+#include "mediapipe/framework/calculator_framework.h"
+#include "mediapipe/framework/port/gmock.h"
+#include "mediapipe/framework/port/gtest.h"
+#include "mediapipe/framework/port/parse_text_proto.h"
+#include "mediapipe/framework/port/status.h"
+#include "mediapipe/framework/port/status_matchers.h"
+
+namespace mediapipe {
+
+template <typename T>
+void DoTestSingleSidePacket(absl::string_view packet_spec,
+                            const T& expected_value) {
+  static constexpr absl::string_view graph_config_template = R"(
+        node {
+          calculator: "ConstantSidePacketCalculator"
+          output_side_packet: "PACKET:packet"
+          options: {
+            [mediapipe.ConstantSidePacketCalculatorOptions.ext]: {
+              packet $0
+            }
+          }
+        }
+      )";
+  CalculatorGraphConfig graph_config =
+      ::mediapipe::ParseTextProtoOrDie<CalculatorGraphConfig>(
+          absl::Substitute(graph_config_template, packet_spec));
+  CalculatorGraph graph;
+  MP_ASSERT_OK(graph.Initialize(graph_config));
+  MP_ASSERT_OK(graph.StartRun({}));
+  MP_ASSERT_OK(graph.WaitUntilIdle());
+
+  MP_ASSERT_OK(graph.GetOutputSidePacket("packet"));
+  auto actual_value =
+      graph.GetOutputSidePacket("packet").ValueOrDie().template Get<T>();
+  EXPECT_EQ(actual_value, expected_value);
+}
+
+TEST(ConstantSidePacketCalculatorTest, EveryPossibleType) {
+  DoTestSingleSidePacket("{ int_value: 2 }", 2);
+  DoTestSingleSidePacket("{ float_value: 6.5f }", 6.5f);
+  DoTestSingleSidePacket("{ bool_value: true }", true);
+  DoTestSingleSidePacket<std::string>(R"({ string_value: "str" })", "str");
+}
+
+TEST(ConstantSidePacketCalculatorTest, MultiplePackets) {
+  CalculatorGraphConfig graph_config =
+      ::mediapipe::ParseTextProtoOrDie<CalculatorGraphConfig>(R"(
+        node {
+          calculator: "ConstantSidePacketCalculator"
+          output_side_packet: "PACKET:0:int_packet"
+          output_side_packet: "PACKET:1:float_packet"
+          output_side_packet: "PACKET:2:bool_packet"
+          output_side_packet: "PACKET:3:string_packet"
+          output_side_packet: "PACKET:4:another_string_packet"
+          output_side_packet: "PACKET:5:another_int_packet"
+          options: {
+            [mediapipe.ConstantSidePacketCalculatorOptions.ext]: {
+              packet { int_value: 256 }
+              packet { float_value: 0.5f }
+              packet { bool_value: false }
+              packet { string_value: "string" }
+              packet { string_value: "another string" }
+              packet { int_value: 128 }
+            }
+          }
+        }
+      )");
+  CalculatorGraph graph;
+  MP_ASSERT_OK(graph.Initialize(graph_config));
+  MP_ASSERT_OK(graph.StartRun({}));
+  MP_ASSERT_OK(graph.WaitUntilIdle());
+
+  MP_ASSERT_OK(graph.GetOutputSidePacket("int_packet"));
+  EXPECT_EQ(graph.GetOutputSidePacket("int_packet").ValueOrDie().Get<int>(),
+            256);
+  MP_ASSERT_OK(graph.GetOutputSidePacket("float_packet"));
+  EXPECT_EQ(graph.GetOutputSidePacket("float_packet").ValueOrDie().Get<float>(),
+            0.5f);
+  MP_ASSERT_OK(graph.GetOutputSidePacket("bool_packet"));
+  EXPECT_FALSE(
+      graph.GetOutputSidePacket("bool_packet").ValueOrDie().Get<bool>());
+  MP_ASSERT_OK(graph.GetOutputSidePacket("string_packet"));
+  EXPECT_EQ(graph.GetOutputSidePacket("string_packet")
+                .ValueOrDie()
+                .Get<std::string>(),
+            "string");
+  MP_ASSERT_OK(graph.GetOutputSidePacket("another_string_packet"));
+  EXPECT_EQ(graph.GetOutputSidePacket("another_string_packet")
+                .ValueOrDie()
+                .Get<std::string>(),
+            "another string");
+  MP_ASSERT_OK(graph.GetOutputSidePacket("another_int_packet"));
+  EXPECT_EQ(
+      graph.GetOutputSidePacket("another_int_packet").ValueOrDie().Get<int>(),
+      128);
+}
+
+TEST(ConstantSidePacketCalculatorTest, ProcessingPacketsWithCorrectTagOnly) {
+  CalculatorGraphConfig graph_config =
+      ::mediapipe::ParseTextProtoOrDie<CalculatorGraphConfig>(R"(
+        node {
+          calculator: "ConstantSidePacketCalculator"
+          output_side_packet: "PACKET:0:int_packet"
+          output_side_packet: "no_tag0"
+          output_side_packet: "PACKET:1:float_packet"
+          output_side_packet: "INCORRECT_TAG:0:name1"
+          output_side_packet: "PACKET:2:bool_packet"
+          output_side_packet: "PACKET:3:string_packet"
+          output_side_packet: "no_tag2"
+          output_side_packet: "INCORRECT_TAG:1:name2"
+          options: {
+            [mediapipe.ConstantSidePacketCalculatorOptions.ext]: {
+              packet { int_value: 256 }
+              packet { float_value: 0.5f }
+              packet { bool_value: false }
+              packet { string_value: "string" }
+            }
+          }
+        }
+      )");
+  CalculatorGraph graph;
+  MP_ASSERT_OK(graph.Initialize(graph_config));
+  MP_ASSERT_OK(graph.StartRun({}));
+  MP_ASSERT_OK(graph.WaitUntilIdle());
+
+  MP_ASSERT_OK(graph.GetOutputSidePacket("int_packet"));
+  EXPECT_EQ(graph.GetOutputSidePacket("int_packet").ValueOrDie().Get<int>(),
+            256);
+  MP_ASSERT_OK(graph.GetOutputSidePacket("float_packet"));
+  EXPECT_EQ(graph.GetOutputSidePacket("float_packet").ValueOrDie().Get<float>(),
+            0.5f);
+  MP_ASSERT_OK(graph.GetOutputSidePacket("bool_packet"));
+  EXPECT_FALSE(
+      graph.GetOutputSidePacket("bool_packet").ValueOrDie().Get<bool>());
+  MP_ASSERT_OK(graph.GetOutputSidePacket("string_packet"));
+  EXPECT_EQ(graph.GetOutputSidePacket("string_packet")
+                .ValueOrDie()
+                .Get<std::string>(),
+            "string");
+}
+
+TEST(ConstantSidePacketCalculatorTest, IncorrectConfig_MoreOptionsThanPackets) {
+  CalculatorGraphConfig graph_config =
+      ::mediapipe::ParseTextProtoOrDie<CalculatorGraphConfig>(R"(
+        node {
+          calculator: "ConstantSidePacketCalculator"
+          output_side_packet: "PACKET:int_packet"
+          options: {
+            [mediapipe.ConstantSidePacketCalculatorOptions.ext]: {
+              packet { int_value: 256 }
+              packet { float_value: 0.5f }
+            }
+          }
+        }
+      )");
+  CalculatorGraph graph;
+  EXPECT_FALSE(graph.Initialize(graph_config).ok());
+}
+
+TEST(ConstantSidePacketCalculatorTest, IncorrectConfig_MorePacketsThanOptions) {
+  CalculatorGraphConfig graph_config =
+      ::mediapipe::ParseTextProtoOrDie<CalculatorGraphConfig>(R"(
+        node {
+          calculator: "ConstantSidePacketCalculator"
+          output_side_packet: "PACKET:0:int_packet"
+          output_side_packet: "PACKET:1:float_packet"
+          options: {
+            [mediapipe.ConstantSidePacketCalculatorOptions.ext]: {
+              packet { int_value: 256 }
+            }
+          }
+        }
+      )");
+  CalculatorGraph graph;
+  EXPECT_FALSE(graph.Initialize(graph_config).ok());
+}
+
+}  // namespace mediapipe

mediapipe/calculators/core/packet_resampler_calculator.cc

@@ -17,6 +17,12 @@
 #include <memory>
 
 namespace {
+// Reflect an integer against the lower and upper bound of an interval.
+int64 ReflectBetween(int64 ts, int64 ts_min, int64 ts_max) {
+  if (ts < ts_min) return 2 * ts_min - ts - 1;
+  if (ts >= ts_max) return 2 * ts_max - ts - 1;
+  return ts;
+}
 
 // Creates a secure random number generator for use in ProcessWithJitter.
 // If no secure random number generator can be constructed, the jitter
@@ -82,6 +88,7 @@ TimestampDiff TimestampDiffFromSeconds(double seconds) {
 
   flush_last_packet_ = resampler_options.flush_last_packet();
   jitter_ = resampler_options.jitter();
+  jitter_with_reflection_ = resampler_options.jitter_with_reflection();
 
   input_data_id_ = cc->Inputs().GetId("DATA", 0);
   if (!input_data_id_.IsValid()) {
@@ -112,6 +119,8 @@ TimestampDiff TimestampDiffFromSeconds(double seconds) {
       << Timestamp::kTimestampUnitsPerSecond;
 
   frame_time_usec_ = static_cast<int64>(1000000.0 / frame_rate_);
+  jitter_usec_ = static_cast<int64>(1000000.0 * jitter_ / frame_rate_);
+  RET_CHECK_LE(jitter_usec_, frame_time_usec_);
 
   video_header_.frame_rate = frame_rate_;
 
@@ -188,12 +197,32 @@ TimestampDiff TimestampDiffFromSeconds(double seconds) {
 
 void PacketResamplerCalculator::InitializeNextOutputTimestampWithJitter() {
   next_output_timestamp_min_ = first_timestamp_;
+  if (jitter_with_reflection_) {
+    next_output_timestamp_ =
+        first_timestamp_ + random_->UnbiasedUniform64(frame_time_usec_);
+    return;
+  }
   next_output_timestamp_ =
       first_timestamp_ + frame_time_usec_ * random_->RandFloat();
 }
 
 void PacketResamplerCalculator::UpdateNextOutputTimestampWithJitter() {
   packet_reservoir_->Clear();
+  if (jitter_with_reflection_) {
+    next_output_timestamp_min_ += frame_time_usec_;
+    Timestamp next_output_timestamp_max_ =
+        next_output_timestamp_min_ + frame_time_usec_;
+
+    next_output_timestamp_ += frame_time_usec_ +
+                              random_->UnbiasedUniform64(2 * jitter_usec_ + 1) -
+                              jitter_usec_;
+    next_output_timestamp_ = Timestamp(ReflectBetween(
+        next_output_timestamp_.Value(), next_output_timestamp_min_.Value(),
+        next_output_timestamp_max_.Value()));
+    CHECK_GE(next_output_timestamp_, next_output_timestamp_min_);
+    CHECK_LT(next_output_timestamp_, next_output_timestamp_max_);
+    return;
+  }
   packet_reservoir_->Disable();
   next_output_timestamp_ +=
       frame_time_usec_ *

mediapipe/calculators/core/packet_resampler_calculator.h

@@ -49,6 +49,38 @@ class PacketReservoir {
 // out of a stream. Given a desired frame rate, packets are going to be
 // removed or added to achieve it.
 //
+// If jitter_ is specified:
+//   - The first packet is chosen randomly (uniform distribution) among frames
+//     that correspond to timestamps [0, 1/frame_rate).  Let the chosen packet
+//     correspond to timestamp t.
+//   - The next packet is chosen randomly (uniform distribution) among frames
+//     that correspond to [t+(1-jitter)/frame_rate, t+(1+jitter)/frame_rate].
+//     - if jitter_with_reflection_ is true, the timestamp will be reflected
+//       against the boundaries of [t_0 + (k-1)/frame_rate, t_0 + k/frame_rate)
+//       so that its marginal distribution is uniform within this interval.
+//       In the formula, t_0 is the timestamp of the first sampled
+//       packet, and the k is the packet index.
+//       See paper (https://arxiv.org/abs/2002.01147) for details.
+//   - t is updated and the process is repeated.
+//   - Note that seed is specified as input side packet for reproducibility of
+//     the resampling.  For Cloud ML Video Intelligence API, the hash of the
+//     input video should serve this purpose.  For YouTube, either video ID or
+//     content hex ID of the input video should do.
+//
+// If jitter_ is not specified:
+//   - The first packet defines the first_timestamp of the output stream,
+//     so it is always emitted.
+//   - If more packets are emitted, they will have timestamp equal to
+//     round(first_timestamp + k * period) , where k is a positive
+//     integer and the period is defined by the frame rate.
+//     Example: first_timestamp=0, fps=30, then the output stream
+//              will have timestamps: 0, 33333, 66667, 100000, etc...
+//   - The packets selected for the output stream are the ones closer
+//     to the exact middle point (33333.33, 66666.67 in our previous
+//     example). In case of ties, later packets are chosen.
+//   - 'Empty' periods happen when there are no packets for a long time
+//     (greater than a period). In this case, we send a copy of the last
+//     packet received before the empty period.
 // The jitter feature is disabled by default. To enable it, you need to
 // implement CreateSecureRandom(const std::string&).
 //
@@ -139,7 +171,12 @@ class PacketResamplerCalculator : public CalculatorBase {
   // Jitter-related variables.
   std::unique_ptr<RandomBase> random_;
   double jitter_ = 0.0;
+  bool jitter_with_reflection_;
+  int64 jitter_usec_;
   Timestamp next_output_timestamp_;
+  // If jittering_with_reflection_ is true, next_output_timestamp_ will be
+  // kept within the interval
+  // [next_output_timestamp_min_, next_output_timestamp_min_ + frame_time_usec_)
   Timestamp next_output_timestamp_min_;
 
   // If specified, output timestamps are aligned with base_timestamp.

mediapipe/calculators/core/packet_resampler_calculator.proto

@@ -66,6 +66,7 @@ message PacketResamplerCalculatorOptions {
   // pseudo-random number generator does its job and the number of frames is
   // sufficiently large, the average frame rate will be close to this value.
   optional double jitter = 4;
+  optional bool jitter_with_reflection = 9 [default = false];
 
   // If specified, output timestamps are aligned with base_timestamp.
   // Otherwise, they are aligned with the first input timestamp.

mediapipe/calculators/image/BUILD

@@ -332,6 +332,7 @@ cc_library(
 cc_library(
     name = "image_cropping_calculator",
     srcs = ["image_cropping_calculator.cc"],
+    hdrs = ["image_cropping_calculator.h"],
     copts = select({
         "//mediapipe:apple": [
             "-x objective-c++",
@@ -371,6 +372,22 @@ cc_library(
     alwayslink = 1,
 )
 
+cc_test(
+    name = "image_cropping_calculator_test",
+    srcs = ["image_cropping_calculator_test.cc"],
+    deps = [
+        ":image_cropping_calculator",
+        ":image_cropping_calculator_cc_proto",
+        "//mediapipe/framework:calculator_framework",
+        "//mediapipe/framework/formats:rect_cc_proto",
+        "//mediapipe/framework/port:gtest_main",
+        "//mediapipe/framework/port:parse_text_proto",
+        "//mediapipe/framework/port:status",
+        "//mediapipe/framework/tool:tag_map",
+        "//mediapipe/framework/tool:tag_map_helper",
+    ],
+)
+
 cc_library(
     name = "luminance_calculator",
     srcs = ["luminance_calculator.cc"],

mediapipe/calculators/image/image_cropping_calculator.cc

@@ -12,10 +12,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+#include "mediapipe/calculators/image/image_cropping_calculator.h"
+
 #include <cmath>
 
-#include "mediapipe/calculators/image/image_cropping_calculator.pb.h"
-#include "mediapipe/framework/calculator_framework.h"
 #include "mediapipe/framework/formats/image_frame.h"
 #include "mediapipe/framework/formats/image_frame_opencv.h"
 #include "mediapipe/framework/formats/rect.pb.h"
@@ -25,7 +25,6 @@
 #include "mediapipe/framework/port/status.h"
 
 #if !defined(MEDIAPIPE_DISABLE_GPU)
-#include "mediapipe/gpu/gl_calculator_helper.h"
 #include "mediapipe/gpu/gl_simple_shaders.h"
 #include "mediapipe/gpu/gpu_buffer.h"
 #include "mediapipe/gpu/shader_util.h"
@@ -52,62 +51,6 @@ constexpr char kWidthTag[] = "WIDTH";
 
 }  // namespace
 
-// Crops the input texture to the given rectangle region. The rectangle can
-// be at arbitrary location on the image with rotation. If there's rotation, the
-// output texture will have the size of the input rectangle. The rotation should
-// be in radian, see rect.proto for detail.
-//
-// Input:
-//   One of the following two tags:
-//   IMAGE - ImageFrame representing the input image.
-//   IMAGE_GPU - GpuBuffer representing the input image.
-//   One of the following two tags (optional if WIDTH/HEIGHT is specified):
-//   RECT - A Rect proto specifying the width/height and location of the
-//          cropping rectangle.
-//   NORM_RECT - A NormalizedRect proto specifying the width/height and location
-//               of the cropping rectangle in normalized coordinates.
-//   Alternative tags to RECT (optional if RECT/NORM_RECT is specified):
-//   WIDTH - The desired width of the output cropped image,
-//           based on image center
-//   HEIGHT - The desired height of the output cropped image,
-//            based on image center
-//
-// Output:
-//   One of the following two tags:
-//   IMAGE - Cropped ImageFrame
-//   IMAGE_GPU - Cropped GpuBuffer.
-//
-// Note: input_stream values take precedence over options defined in the graph.
-//
-class ImageCroppingCalculator : public CalculatorBase {
- public:
-  ImageCroppingCalculator() = default;
-  ~ImageCroppingCalculator() override = default;
-
-  static ::mediapipe::Status GetContract(CalculatorContract* cc);
-  ::mediapipe::Status Open(CalculatorContext* cc) override;
-  ::mediapipe::Status Process(CalculatorContext* cc) override;
-  ::mediapipe::Status Close(CalculatorContext* cc) override;
-
- private:
-  ::mediapipe::Status RenderCpu(CalculatorContext* cc);
-  ::mediapipe::Status RenderGpu(CalculatorContext* cc);
-  ::mediapipe::Status InitGpu(CalculatorContext* cc);
-  void GlRender();
-  void GetOutputDimensions(CalculatorContext* cc, int src_width, int src_height,
-                           int* dst_width, int* dst_height);
-
-  mediapipe::ImageCroppingCalculatorOptions options_;
-
-  bool use_gpu_ = false;
-  // Output texture corners (4) after transoformation in normalized coordinates.
-  float transformed_points_[8];
-#if !defined(MEDIAPIPE_DISABLE_GPU)
-  bool gpu_initialized_ = false;
-  mediapipe::GlCalculatorHelper gpu_helper_;
-  GLuint program_ = 0;
-#endif  //  !MEDIAPIPE_DISABLE_GPU
-};
 REGISTER_CALCULATOR(ImageCroppingCalculator);
 
 ::mediapipe::Status ImageCroppingCalculator::GetContract(
@@ -132,7 +75,11 @@ REGISTER_CALCULATOR(ImageCroppingCalculator);
   }
 #endif  //  !MEDIAPIPE_DISABLE_GPU
 
-  RET_CHECK(cc->Inputs().HasTag(kRectTag) ^ cc->Inputs().HasTag(kNormRectTag));
+  RET_CHECK(cc->Inputs().HasTag(kRectTag) ^ cc->Inputs().HasTag(kNormRectTag) ^
+            (cc->Options<mediapipe::ImageCroppingCalculatorOptions>()
+                 .has_norm_width() &&
+             cc->Options<mediapipe::ImageCroppingCalculatorOptions>()
+                 .has_norm_height()));
   if (cc->Inputs().HasTag(kRectTag)) {
     cc->Inputs().Tag(kRectTag).Set<Rect>();
   }
@@ -222,41 +169,8 @@ REGISTER_CALCULATOR(ImageCroppingCalculator);
   const auto& input_img = cc->Inputs().Tag(kImageTag).Get<ImageFrame>();
   cv::Mat input_mat = formats::MatView(&input_img);
 
-  float rect_center_x = input_img.Width() / 2.0f;
+  auto [target_width, target_height, rect_center_x, rect_center_y, rotation] =
-  float rect_center_y = input_img.Height() / 2.0f;
+      GetCropSpecs(cc, input_img.Width(), input_img.Height());
-  float rotation = 0.0f;
-  int target_width = input_img.Width();
-  int target_height = input_img.Height();
-  if (cc->Inputs().HasTag(kRectTag)) {
-    const auto& rect = cc->Inputs().Tag(kRectTag).Get<Rect>();
-    if (rect.width() > 0 && rect.height() > 0 && rect.x_center() >= 0 &&
-        rect.y_center() >= 0) {
-      rect_center_x = rect.x_center();
-      rect_center_y = rect.y_center();
-      target_width = rect.width();
-      target_height = rect.height();
-      rotation = rect.rotation();
-    }
-  } else if (cc->Inputs().HasTag(kNormRectTag)) {
-    const auto& rect = cc->Inputs().Tag(kNormRectTag).Get<NormalizedRect>();
-    if (rect.width() > 0.0 && rect.height() > 0.0 && rect.x_center() >= 0.0 &&
-        rect.y_center() >= 0.0) {
-      rect_center_x = std::round(rect.x_center() * input_img.Width());
-      rect_center_y = std::round(rect.y_center() * input_img.Height());
-      target_width = std::round(rect.width() * input_img.Width());
-      target_height = std::round(rect.height() * input_img.Height());
-      rotation = rect.rotation();
-    }
-  } else {
-    if (cc->Inputs().HasTag(kWidthTag) && cc->Inputs().HasTag(kHeightTag)) {
-      target_width = cc->Inputs().Tag(kWidthTag).Get<int>();
-      target_height = cc->Inputs().Tag(kHeightTag).Get<int>();
-    } else if (options_.has_width() && options_.has_height()) {
-      target_width = options_.width();
-      target_height = options_.height();
-    }
-    rotation = options_.rotation();
-  }
 
   const cv::RotatedRect min_rect(cv::Point2f(rect_center_x, rect_center_y),
                                  cv::Size2f(target_width, target_height),
@@ -433,46 +347,8 @@ void ImageCroppingCalculator::GetOutputDimensions(CalculatorContext* cc,
                                                   int src_width, int src_height,
                                                   int* dst_width,
                                                   int* dst_height) {
-  // Get the size of the cropping box.
+  auto [crop_width, crop_height, x_center, y_center, rotation] =
-  int crop_width = src_width;
+      GetCropSpecs(cc, src_width, src_height);
-  int crop_height = src_height;
-  // Get the center of cropping box. Default is the at the center.
-  int x_center = src_width / 2;
-  int y_center = src_height / 2;
-  // Get the rotation of the cropping box.
-  float rotation = 0.0f;
-  if (cc->Inputs().HasTag(kRectTag)) {
-    const auto& rect = cc->Inputs().Tag(kRectTag).Get<Rect>();
-    // Only use the rect if it is valid.
-    if (rect.width() > 0 && rect.height() > 0 && rect.x_center() >= 0 &&
-        rect.y_center() >= 0) {
-      x_center = rect.x_center();
-      y_center = rect.y_center();
-      crop_width = rect.width();
-      crop_height = rect.height();
-      rotation = rect.rotation();
-    }
-  } else if (cc->Inputs().HasTag(kNormRectTag)) {
-    const auto& rect = cc->Inputs().Tag(kNormRectTag).Get<NormalizedRect>();
-    // Only use the rect if it is valid.
-    if (rect.width() > 0.0 && rect.height() > 0.0 && rect.x_center() >= 0.0 &&
-        rect.y_center() >= 0.0) {
-      x_center = std::round(rect.x_center() * src_width);
-      y_center = std::round(rect.y_center() * src_height);
-      crop_width = std::round(rect.width() * src_width);
-      crop_height = std::round(rect.height() * src_height);
-      rotation = rect.rotation();
-    }
-  } else {
-    if (cc->Inputs().HasTag(kWidthTag) && cc->Inputs().HasTag(kHeightTag)) {
-      crop_width = cc->Inputs().Tag(kWidthTag).Get<int>();
-      crop_height = cc->Inputs().Tag(kHeightTag).Get<int>();
-    } else if (options_.has_width() && options_.has_height()) {
-      crop_width = options_.width();
-      crop_height = options_.height();
-    }
-    rotation = options_.rotation();
-  }
 
   const float half_width = crop_width / 2.0f;
   const float half_height = crop_height / 2.0f;
@@ -508,4 +384,82 @@ void ImageCroppingCalculator::GetOutputDimensions(CalculatorContext* cc,
   *dst_height = std::max(1, height);
 }
 
+RectSpec ImageCroppingCalculator::GetCropSpecs(const CalculatorContext* cc,
+                                               int src_width, int src_height) {
+  // Get the size of the cropping box.
+  int crop_width = src_width;
+  int crop_height = src_height;
+  // Get the center of cropping box. Default is the at the center.
+  int x_center = src_width / 2;
+  int y_center = src_height / 2;
+  // Get the rotation of the cropping box.
+  float rotation = 0.0f;
+  // Get the normalized width and height if specified by the inputs or options.
+  float normalized_width = 0.0f;
+  float normalized_height = 0.0f;
+
+  mediapipe::ImageCroppingCalculatorOptions options =
+      cc->Options<mediapipe::ImageCroppingCalculatorOptions>();
+
+  // width/height, norm_width/norm_height from input streams take precednece.
+  if (cc->Inputs().HasTag(kRectTag)) {
+    const auto& rect = cc->Inputs().Tag(kRectTag).Get<Rect>();
+    // Only use the rect if it is valid.
+    if (rect.width() > 0 && rect.height() > 0 && rect.x_center() >= 0 &&
+        rect.y_center() >= 0) {
+      x_center = rect.x_center();
+      y_center = rect.y_center();
+      crop_width = rect.width();
+      crop_height = rect.height();
+      rotation = rect.rotation();
+    }
+  } else if (cc->Inputs().HasTag(kNormRectTag)) {
+    const auto& norm_rect =
+        cc->Inputs().Tag(kNormRectTag).Get<NormalizedRect>();
+    if (norm_rect.width() > 0.0 && norm_rect.height() > 0.0) {
+      normalized_width = norm_rect.width();
+      normalized_height = norm_rect.height();
+      x_center = std::round(norm_rect.x_center() * src_width);
+      y_center = std::round(norm_rect.y_center() * src_height);
+      rotation = norm_rect.rotation();
+    }
+  } else if (cc->Inputs().HasTag(kWidthTag) &&
+             cc->Inputs().HasTag(kHeightTag)) {
+    crop_width = cc->Inputs().Tag(kWidthTag).Get<int>();
+    crop_height = cc->Inputs().Tag(kHeightTag).Get<int>();
+  } else if (options.has_width() && options.has_height()) {
+    crop_width = options.width();
+    crop_height = options.height();
+  } else if (options.has_norm_width() && options.has_norm_height()) {
+    normalized_width = options.norm_width();
+    normalized_height = options.norm_height();
+  }
+
+  // Get the crop width and height from the normalized width and height.
+  if (normalized_width > 0 && normalized_height > 0) {
+    crop_width = std::round(normalized_width * src_width);
+    crop_height = std::round(normalized_height * src_height);
+  }
+
+  // Rotation and center values from input streams take precedence, so only
+  // look at those values in the options if kRectTag and kNormRectTag are not
+  // present from the inputs.
+  if (!cc->Inputs().HasTag(kRectTag) && !cc->Inputs().HasTag(kNormRectTag)) {
+    if (options.has_norm_center_x() && options.has_norm_center_y()) {
+      x_center = std::round(options.norm_center_x() * src_width);
+      y_center = std::round(options.norm_center_y() * src_height);
+    }
+    if (options.has_rotation()) {
+      rotation = options.rotation();
+    }
+  }
+  return {
+      .width = crop_width,
+      .height = crop_height,
+      .center_x = x_center,
+      .center_y = y_center,
+      .rotation = rotation,
+  };
+}
+
 }  // namespace mediapipe

mediapipe/calculators/image/image_cropping_calculator.h

@@ -0,0 +1,86 @@
+#ifndef MEDIAPIPE_CALCULATORS_IMAGE_IMAGE_CROPPING_CALCULATOR_H_
+#define MEDIAPIPE_CALCULATORS_IMAGE_IMAGE_CROPPING_CALCULATOR_H_
+
+#include "mediapipe/calculators/image/image_cropping_calculator.pb.h"
+#include "mediapipe/framework/calculator_framework.h"
+
+#if !defined(MEDIAPIPE_DISABLE_GPU)
+#include "mediapipe/gpu/gl_calculator_helper.h"
+#endif  //  !MEDIAPIPE_DISABLE_GPU
+
+// Crops the input texture to the given rectangle region. The rectangle can
+// be at arbitrary location on the image with rotation. If there's rotation, the
+// output texture will have the size of the input rectangle. The rotation should
+// be in radian, see rect.proto for detail.
+//
+// Input:
+//   One of the following two tags:
+//   IMAGE - ImageFrame representing the input image.
+//   IMAGE_GPU - GpuBuffer representing the input image.
+//   One of the following two tags (optional if WIDTH/HEIGHT is specified):
+//   RECT - A Rect proto specifying the width/height and location of the
+//          cropping rectangle.
+//   NORM_RECT - A NormalizedRect proto specifying the width/height and location
+//               of the cropping rectangle in normalized coordinates.
+//   Alternative tags to RECT (optional if RECT/NORM_RECT is specified):
+//   WIDTH - The desired width of the output cropped image,
+//           based on image center
+//   HEIGHT - The desired height of the output cropped image,
+//            based on image center
+//
+// Output:
+//   One of the following two tags:
+//   IMAGE - Cropped ImageFrame
+//   IMAGE_GPU - Cropped GpuBuffer.
+//
+// Note: input_stream values take precedence over options defined in the graph.
+//
+namespace mediapipe {
+struct RectSpec {
+  int width;
+  int height;
+  int center_x;
+  int center_y;
+  float rotation;
+
+  bool operator==(const RectSpec& rect) const {
+    return (width == rect.width && height == rect.height &&
+            center_x == rect.center_x && center_y == rect.center_y &&
+            rotation == rect.rotation);
+  }
+};
+
+class ImageCroppingCalculator : public CalculatorBase {
+ public:
+  ImageCroppingCalculator() = default;
+  ~ImageCroppingCalculator() override = default;
+
+  static ::mediapipe::Status GetContract(CalculatorContract* cc);
+  ::mediapipe::Status Open(CalculatorContext* cc) override;
+  ::mediapipe::Status Process(CalculatorContext* cc) override;
+  ::mediapipe::Status Close(CalculatorContext* cc) override;
+  static RectSpec GetCropSpecs(const CalculatorContext* cc, int src_width,
+                               int src_height);
+
+ private:
+  ::mediapipe::Status RenderCpu(CalculatorContext* cc);
+  ::mediapipe::Status RenderGpu(CalculatorContext* cc);
+  ::mediapipe::Status InitGpu(CalculatorContext* cc);
+  void GlRender();
+  void GetOutputDimensions(CalculatorContext* cc, int src_width, int src_height,
+                           int* dst_width, int* dst_height);
+
+  mediapipe::ImageCroppingCalculatorOptions options_;
+
+  bool use_gpu_ = false;
+  // Output texture corners (4) after transoformation in normalized coordinates.
+  float transformed_points_[8];
+#if !defined(MEDIAPIPE_DISABLE_GPU)
+  bool gpu_initialized_ = false;
+  mediapipe::GlCalculatorHelper gpu_helper_;
+  GLuint program_ = 0;
+#endif  //  !MEDIAPIPE_DISABLE_GPU
+};
+
+}  // namespace mediapipe
+#endif  // MEDIAPIPE_CALCULATORS_IMAGE_IMAGE_CROPPING_CALCULATOR_H_

mediapipe/calculators/image/image_cropping_calculator.proto

@@ -30,4 +30,14 @@ message ImageCroppingCalculatorOptions {
 
   // Rotation angle is counter-clockwise in radian.
   optional float rotation = 3 [default = 0.0];
+
+  // Normalized width and height of the output rect. Value is within [0, 1].
+  optional float norm_width = 4;
+  optional float norm_height = 5;
+
+  // Normalized location of the center of the output
+  // rectangle in image coordinates. Value is within [0, 1].
+  // The (0, 0) point is at the (top, left) corner.
+  optional float norm_center_x = 6 [default = 0];
+  optional float norm_center_y = 7 [default = 0];
 }

mediapipe/calculators/image/image_cropping_calculator_test.cc

@@ -0,0 +1,216 @@
+// Copyright 2020 The MediaPipe Authors.
+//
+// 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 "mediapipe/calculators/image/image_cropping_calculator.h"
+
+#include <cmath>
+#include <memory>
+
+#include "mediapipe/calculators/image/image_cropping_calculator.pb.h"
+#include "mediapipe/framework/calculator_framework.h"
+#include "mediapipe/framework/formats/rect.pb.h"
+#include "mediapipe/framework/port/gtest.h"
+#include "mediapipe/framework/port/parse_text_proto.h"
+#include "mediapipe/framework/port/status_matchers.h"
+#include "mediapipe/framework/tool/tag_map.h"
+#include "mediapipe/framework/tool/tag_map_helper.h"
+
+namespace mediapipe {
+
+namespace {
+
+constexpr int input_width = 100;
+constexpr int input_height = 100;
+
+constexpr char kRectTag[] = "RECT";
+constexpr char kHeightTag[] = "HEIGHT";
+constexpr char kWidthTag[] = "WIDTH";
+
+// Test normal case, where norm_width and norm_height in options are set.
+TEST(ImageCroppingCalculatorTest, GetCroppingDimensionsNormal) {
+  auto calculator_node =
+      ParseTextProtoOrDie<mediapipe::CalculatorGraphConfig::Node>(
+          R"(
+            calculator: "ImageCroppingCalculator"
+            input_stream: "IMAGE_GPU:input_frames"
+            output_stream: "IMAGE_GPU:cropped_output_frames"
+            options: {
+              [mediapipe.ImageCroppingCalculatorOptions.ext] {
+                norm_width: 0.6
+                norm_height: 0.6
+                norm_center_x: 0.5
+                norm_center_y: 0.5
+                rotation: 0.3
+              }
+            }
+          )");
+
+  auto calculator_state =
+      CalculatorState("Node", 0, "Calculator", calculator_node, nullptr);
+  auto cc =
+      CalculatorContext(&calculator_state, tool::CreateTagMap({}).ValueOrDie(),
+                        tool::CreateTagMap({}).ValueOrDie());
+
+  RectSpec expectRect = {
+      .width = 60,
+      .height = 60,
+      .center_x = 50,
+      .center_y = 50,
+      .rotation = 0.3,
+  };
+  EXPECT_EQ(
+      ImageCroppingCalculator::GetCropSpecs(&cc, input_width, input_height),
+      expectRect);
+}  // TEST
+
+// Test when (width height) + (norm_width norm_height) are set in options.
+// width and height should take precedence.
+TEST(ImageCroppingCalculatorTest, RedundantSpecInOptions) {
+  auto calculator_node =
+      ParseTextProtoOrDie<mediapipe::CalculatorGraphConfig::Node>(
+          R"(
+            calculator: "ImageCroppingCalculator"
+            input_stream: "IMAGE_GPU:input_frames"
+            output_stream: "IMAGE_GPU:cropped_output_frames"
+            options: {
+              [mediapipe.ImageCroppingCalculatorOptions.ext] {
+                width: 50
+                height: 50
+                norm_width: 0.6
+                norm_height: 0.6
+                norm_center_x: 0.5
+                norm_center_y: 0.5
+                rotation: 0.3
+              }
+            }
+          )");
+
+  auto calculator_state =
+      CalculatorState("Node", 0, "Calculator", calculator_node, nullptr);
+  auto cc =
+      CalculatorContext(&calculator_state, tool::CreateTagMap({}).ValueOrDie(),
+                        tool::CreateTagMap({}).ValueOrDie());
+  RectSpec expectRect = {
+      .width = 50,
+      .height = 50,
+      .center_x = 50,
+      .center_y = 50,
+      .rotation = 0.3,
+  };
+  EXPECT_EQ(
+      ImageCroppingCalculator::GetCropSpecs(&cc, input_width, input_height),
+      expectRect);
+}  // TEST
+
+// Test when WIDTH HEIGHT are set from input stream,
+// and options has norm_width/height set.
+// WIDTH HEIGHT from input stream should take precedence.
+TEST(ImageCroppingCalculatorTest, RedundantSpectWithInputStream) {
+  auto calculator_node =
+      ParseTextProtoOrDie<mediapipe::CalculatorGraphConfig::Node>(
+          R"(
+            calculator: "ImageCroppingCalculator"
+            input_stream: "IMAGE_GPU:input_frames"
+            input_stream: "WIDTH:crop_width"
+            input_stream: "HEIGHT:crop_height"
+            output_stream: "IMAGE_GPU:cropped_output_frames"
+            options: {
+              [mediapipe.ImageCroppingCalculatorOptions.ext] {
+                width: 50
+                height: 50
+                norm_width: 0.6
+                norm_height: 0.6
+                norm_center_x: 0.5
+                norm_center_y: 0.5
+                rotation: 0.3
+              }
+            }
+          )");
+
+  auto calculator_state =
+      CalculatorState("Node", 0, "Calculator", calculator_node, nullptr);
+  auto inputTags = tool::CreateTagMap({
+                                          "HEIGHT:0:crop_height",
+                                          "WIDTH:0:crop_width",
+                                      })
+                       .ValueOrDie();
+  auto cc = CalculatorContext(&calculator_state, inputTags,
+                              tool::CreateTagMap({}).ValueOrDie());
+  auto& inputs = cc.Inputs();
+  inputs.Tag(kHeightTag).Value() = MakePacket<int>(1);
+  inputs.Tag(kWidthTag).Value() = MakePacket<int>(1);
+  RectSpec expectRect = {
+      .width = 1,
+      .height = 1,
+      .center_x = 50,
+      .center_y = 50,
+      .rotation = 0.3,
+  };
+  EXPECT_EQ(
+      ImageCroppingCalculator::GetCropSpecs(&cc, input_width, input_height),
+      expectRect);
+}  // TEST
+
+// Test when RECT is set from input stream,
+// and options has norm_width/height set.
+// RECT from input stream should take precedence.
+TEST(ImageCroppingCalculatorTest, RedundantSpecWithInputStream) {
+  auto calculator_node =
+      ParseTextProtoOrDie<mediapipe::CalculatorGraphConfig::Node>(
+          R"(
+            calculator: "ImageCroppingCalculator"
+            input_stream: "IMAGE_GPU:input_frames"
+            input_stream: "RECT:rect"
+            output_stream: "IMAGE_GPU:cropped_output_frames"
+            options: {
+              [mediapipe.ImageCroppingCalculatorOptions.ext] {
+                width: 50
+                height: 50
+                norm_width: 0.6
+                norm_height: 0.6
+                norm_center_x: 0.5
+                norm_center_y: 0.5
+                rotation: 0.3
+              }
+            }
+          )");
+
+  auto calculator_state =
+      CalculatorState("Node", 0, "Calculator", calculator_node, nullptr);
+  auto inputTags = tool::CreateTagMap({
+                                          "RECT:0:rect",
+                                      })
+                       .ValueOrDie();
+  auto cc = CalculatorContext(&calculator_state, inputTags,
+                              tool::CreateTagMap({}).ValueOrDie());
+  auto& inputs = cc.Inputs();
+  mediapipe::Rect rect = ParseTextProtoOrDie<mediapipe::Rect>(
+      R"(
+        width: 1 height: 1 x_center: 40 y_center: 40 rotation: 0.5
+      )");
+  inputs.Tag(kRectTag).Value() = MakePacket<mediapipe::Rect>(rect);
+  RectSpec expectRect = {
+      .width = 1,
+      .height = 1,
+      .center_x = 40,
+      .center_y = 40,
+      .rotation = 0.5,
+  };
+  EXPECT_EQ(
+      ImageCroppingCalculator::GetCropSpecs(&cc, input_width, input_height),
+      expectRect);
+}  // TEST
+
+}  // namespace
+}  // namespace mediapipe

mediapipe/calculators/image/testdata/BUILD

@@ -21,6 +21,7 @@ filegroup(
         "dino.jpg",
         "dino_quality_50.jpg",
         "dino_quality_80.jpg",
+        "front_camera_pixel2.jpg",
     ],
     visibility = ["//visibility:public"],
 )

mediapipe/calculators/util/timed_box_list_to_render_data_calculator.cc

@@ -46,6 +46,7 @@ void AddTimedBoxProtoToRenderData(
       line_annotation->mutable_color()->set_b(options.box_color().b());
       line_annotation->set_thickness(options.thickness());
       RenderAnnotation::Line* line = line_annotation->mutable_line();
+      line->set_normalized(true);
       line->set_x_start(box_proto.quad().vertices(i * 2));
       line->set_y_start(box_proto.quad().vertices(i * 2 + 1));
       line->set_x_end(box_proto.quad().vertices(next_corner * 2));

mediapipe/calculators/video/tvl1_optical_flow_calculator.cc

@@ -88,7 +88,8 @@ class Tvl1OpticalFlowCalculator : public CalculatorBase {
   // cv::DenseOpticalFlow is not thread-safe. Invoking multiple
   // DenseOpticalFlow::calc() in parallel may lead to memory corruption or
   // memory leak.
-  std::list<cv::Ptr<cv::DenseOpticalFlow>> tvl1_computers_ GUARDED_BY(mutex_);
+  std::list<cv::Ptr<cv::DenseOpticalFlow>> tvl1_computers_
+      ABSL_GUARDED_BY(mutex_);
   absl::Mutex mutex_;
 };
 

mediapipe/docs/examples.md

@@ -120,7 +120,7 @@ and do the model inference with the baseline model.
 MediaPipe for media processing to prepare video data sets for training a
 TensorFlow model.
 
-### Automatic video cropping
+### AutoFlip - Automatic video cropping
 
 [AutoFlip](./autoflip.md) shows how to use MediaPipe to build an automatic video
 cropping pipeline that can convert an input video to arbitrary aspect ratios.
@@ -142,6 +142,7 @@ GPU with live video from a webcam.
 *   [Desktop GPU](./face_detection_desktop.md)
 *   [Desktop CPU](./face_detection_desktop.md)
 
+
 ### Hand Tracking on Desktop with Webcam
 
 [Hand Tracking on Desktop with Webcam](./hand_tracking_desktop.md) shows how to
@@ -184,3 +185,18 @@ EdgeTPU on
 [Face Detection on Coral with Webcam](./face_detection_coral_devboard.md) shows
 how to use quantized face detection TFlite model accelerated with EdgeTPU on
 [Google Coral Dev Board](https://coral.withgoogle.com/products/dev-board).
+
+
+## Web Browser
+
+Below are samples that can directly be run in your web browser.
+See more details in [MediaPipe on the Web](./web.md) and
+[Google Developer blog post](https://mediapipe.page.link/webdevblog)
+
+### [Face Detection In Browser](https://viz.mediapipe.dev/demo/face_detection)
+
+### [Hand Detection In Browser](https://viz.mediapipe.dev/demo/hand_detection)
+
+### [Hand Tracking In Browser](https://viz.mediapipe.dev/demo/hand_tracking)
+
+### [Hair Segmentation In Browser](https://viz.mediapipe.dev/demo/hair_segmentation)

mediapipe/docs/face_detection_desktop.md

@@ -18,7 +18,9 @@ Note: Desktop GPU works only on Linux. Mesa drivers need to be installed. Please
 see
 [step 4 of "Installing on Debian and Ubuntu" in the installation guide](./install.md).
 
-Note: If MediaPipe depends on OpenCV 2, please see the [known issues with OpenCV 2](#known-issues-with-opencv-2) section.
+Note: If MediaPipe depends on OpenCV 2, please see the
+[known issues with OpenCV 2](./object_detection_desktop.md#known-issues-with-opencv-2)
+section.
 
 ### TensorFlow Lite Face Detection Demo with Webcam (CPU)
 
@@ -66,7 +68,8 @@ $ GLOG_logtostderr=1 bazel-bin/mediapipe/examples/desktop/face_detection/face_de
     --calculator_graph_config_file=mediapipe/graphs/face_detection/face_detection_mobile_gpu.pbtxt
 ```
 
-Issues running? Please first [check that your GPU is supported](gpu.md#desktop-gpu-linux).
+Issues running? Please first
+[check that your GPU is supported](./gpu.md#desktop-gpu-linux)
 
 #### Graph
 

mediapipe/docs/hair_segmentation_desktop.md

@@ -15,7 +15,9 @@ Note: Desktop GPU works only on Linux. Mesa drivers need to be installed. Please
 see
 [step 4 of "Installing on Debian and Ubuntu" in the installation guide](./install.md).
 
-Note: If MediaPipe depends on OpenCV 2, please see the [known issues with OpenCV 2](#known-issues-with-opencv-2) section.
+Note: If MediaPipe depends on OpenCV 2, please see the
+[known issues with OpenCV 2](./object_detection_desktop.md#known-issues-with-opencv-2)
+section.
 
 ### TensorFlow Lite Hair Segmentation Demo with Webcam (GPU)
 
@@ -40,7 +42,8 @@ $ GLOG_logtostderr=1 bazel-bin/mediapipe/examples/desktop/hair_segmentation/hair
     --calculator_graph_config_file=mediapipe/graphs/hair_segmentation/hair_segmentation_mobile_gpu.pbtxt
 ```
 
-Issues running? Please first [check that your GPU is supported](gpu.md#desktop-gpu-linux).
+Issues running? Please first
+[check that your GPU is supported](./gpu.md#desktop-gpu-linux)
 
 #### Graph
 

mediapipe/docs/hand_tracking_desktop.md

@@ -17,7 +17,9 @@ Note: Desktop GPU works only on Linux. Mesa drivers need to be installed. Please
 see
 [step 4 of "Installing on Debian and Ubuntu" in the installation guide](./install.md).
 
-Note: If MediaPipe depends on OpenCV 2, please see the [known issues with OpenCV 2](#known-issues-with-opencv-2) section.
+Note: If MediaPipe depends on OpenCV 2, please see the
+[known issues with OpenCV 2](./object_detection_desktop.md#known-issues-with-opencv-2)
+section.
 
 ### TensorFlow Lite Hand Tracking Demo with Webcam (CPU)
 
@@ -61,7 +63,8 @@ $ GLOG_logtostderr=1 bazel-bin/mediapipe/examples/desktop/hand_tracking/hand_tra
     --calculator_graph_config_file=mediapipe/graphs/hand_tracking/hand_tracking_mobile.pbtxt
 ```
 
-Issues running? Please first [check that your GPU is supported](gpu.md#desktop-gpu-linux).
+Issues running? Please first
+[check that your GPU is supported](./gpu.md#desktop-gpu-linux)
 
 #### Graph
 

mediapipe/docs/multi_hand_tracking_desktop.md

@@ -19,7 +19,8 @@ see
 [step 4 of "Installing on Debian and Ubuntu" in the installation guide](./install.md).
 
 Note: If MediaPipe depends on OpenCV 2, please see the
-[known issues with OpenCV 2](#known-issues-with-opencv-2) section.
+[known issues with OpenCV 2](./object_detection_desktop.md#known-issues-with-opencv-2)
+section.
 
 ### TensorFlow Lite Multi-Hand Tracking Demo with Webcam (CPU)
 
@@ -61,7 +62,8 @@ $ GLOG_logtostderr=1 bazel-bin/mediapipe/examples/desktop/multi_hand_tracking/mu
     --calculator_graph_config_file=mediapipe/graphs/hand_tracking/multi_hand_tracking_mobile.pbtxt
 ```
 
-Issues running? Please first [check that your GPU is supported](gpu.md#desktop-gpu-linux).
+Issues running? Please first
+[check that your GPU is supported](./gpu.md#desktop-gpu-linux)
 
 #### Graph
 

mediapipe/docs/web.md

@@ -7,6 +7,8 @@ in the browser client-side. The official API is under construction, but the core
 technology has been proven effective, and we can already show interactive
 cross-platform demos using your live webcam.
 
+[For more details, read this Google Developer blog post](https://mediapipe.page.link/webdevblog)
+
 ![image](images/web_effect.gif) ![image](images/web_segmentation.gif)
 
 ### Hand Tracking (with and without SIMD support)
@@ -21,6 +23,3 @@ support.  Below are two different versions of the
   1. WebAssembly MVP [demo](https://mediapipe.page.link/cds-ht) running around 5-8 frames per second on Desktop Chrome
 
   2. WebAssembly SIMD [demo](https://mediapipe.page.link/cds-ht-simd) running around 15-18 frames per second on *Canary* Chrome for Desktop, which must additionally be launched with the option `--js-flags="--experimental-wasm-simd"`
-
-
-NOTE: This page is a work-in-progress. More to come soon!

mediapipe/examples/coral/BUILD

@@ -40,7 +40,7 @@ cc_library(
 # Demos
 
 cc_binary(
-    name = "object_detection_cpu",
+    name = "object_detection_tpu",
     deps = [
         "//mediapipe/examples/coral:demo_run_graph_main",
         "//mediapipe/graphs/object_detection:desktop_tflite_calculators",
@@ -48,7 +48,7 @@ cc_binary(
 )
 
 cc_binary(
-    name = "face_detection_cpu",
+    name = "face_detection_tpu",
     deps = [
         "//mediapipe/examples/coral:demo_run_graph_main",
         "//mediapipe/graphs/face_detection:desktop_tflite_calculators",

mediapipe/examples/coral/README.md

@@ -19,13 +19,13 @@ Docker container for building MediaPipe applications that run on Edge TPU.
 * (on coral device) prepare MediaPipe
 
         cd ~
-        sudo apt-get install git
+        sudo apt-get install -y git
         git clone https://github.com/google/mediapipe.git
         mkdir mediapipe/bazel-bin
 
 * (on coral device) install opencv 3.2
 
-        sudo apt-get update && apt-get install -y libopencv-dev
+        sudo apt-get update && sudo apt-get install -y libopencv-dev
 
 * (on coral device) find all opencv libs
 
@@ -90,9 +90,9 @@ Docker container for building MediaPipe applications that run on Edge TPU.
            visibility = ["//visibility:public"],
          )
 
-* Edit *tflite_inference_calculator.cc*  BUILD rules:
+* Edit /mediapipe/mediapipe/calculators/tflite/BUILD to change rules for *tflite_inference_calculator.cc*
 
-        sed -i 's/\":tflite_inference_calculator_cc_proto\",/\":tflite_inference_calculator_cc_proto\",\n\t\"@edgetpu\/\/:header\",\n\t\"@libedgetpu\/\/:lib\",/g' mediapipe/calculators/tflite/BUILD
+        sed -i 's/\":tflite_inference_calculator_cc_proto\",/\":tflite_inference_calculator_cc_proto\",\n\t\"@edgetpu\/\/:header\",\n\t\"@libedgetpu\/\/:lib\",/g' /mediapipe/mediapipe/calculators/tflite/BUILD
 
       The above command should add
 
@@ -105,37 +105,37 @@ Docker container for building MediaPipe applications that run on Edge TPU.
 
 * Object detection demo
 
-        bazel build -c opt --crosstool_top=@crosstool//:toolchains --compiler=gcc --cpu=aarch64 --define MEDIAPIPE_DISABLE_GPU=1 --copt -DMEDIAPIPE_EDGE_TPU --copt=-flax-vector-conversions mediapipe/examples/coral:object_detection_cpu
+        bazel build -c opt --crosstool_top=@crosstool//:toolchains --compiler=gcc --cpu=aarch64 --define MEDIAPIPE_DISABLE_GPU=1 --copt -DMEDIAPIPE_EDGE_TPU --copt=-flax-vector-conversions mediapipe/examples/coral:object_detection_tpu
 
- Copy object_detection_cpu binary to the MediaPipe checkout on the coral device
+ Copy object_detection_tpu binary to the MediaPipe checkout on the coral device
 
         # outside docker env, open new terminal on host machine #
         docker ps
-        docker cp <container-id>:/mediapipe/bazel-bin/mediapipe/examples/coral/object_detection_cpu /tmp/.
+        docker cp <container-id>:/mediapipe/bazel-bin/mediapipe/examples/coral/object_detection_tpu /tmp/.
-        mdt push /tmp/object_detection_cpu /home/mendel/mediapipe/bazel-bin/.
+        mdt push /tmp/object_detection_tpu /home/mendel/mediapipe/bazel-bin/.
 
 * Face detection demo
 
-        bazel build -c opt --crosstool_top=@crosstool//:toolchains --compiler=gcc --cpu=aarch64 --define MEDIAPIPE_DISABLE_GPU=1 --copt -DMEDIAPIPE_EDGE_TPU --copt=-flax-vector-conversions mediapipe/examples/coral:face_detection_cpu
+        bazel build -c opt --crosstool_top=@crosstool//:toolchains --compiler=gcc --cpu=aarch64 --define MEDIAPIPE_DISABLE_GPU=1 --copt -DMEDIAPIPE_EDGE_TPU --copt=-flax-vector-conversions mediapipe/examples/coral:face_detection_tpu
 
- Copy face_detection_cpu binary to the MediaPipe checkout on the coral device
+ Copy face_detection_tpu binary to the MediaPipe checkout on the coral device
 
         # outside docker env, open new terminal on host machine #
         docker ps
-        docker cp <container-id>:/mediapipe/bazel-bin/mediapipe/examples/coral/face_detection_cpu /tmp/.
+        docker cp <container-id>:/mediapipe/bazel-bin/mediapipe/examples/coral/face_detection_tpu /tmp/.
-        mdt push /tmp/face_detection_cpu /home/mendel/mediapipe/bazel-bin/.
+        mdt push /tmp/face_detection_tpu /home/mendel/mediapipe/bazel-bin/.
 
 ## On the coral device (with display)
 
      # Object detection
      cd ~/mediapipe
-     chmod +x bazel-bin/object_detection_cpu
+     chmod +x bazel-bin/object_detection_tpu
      export GLOG_logtostderr=1
-     bazel-bin/object_detection_cpu --calculator_graph_config_file=mediapipe/examples/coral/graphs/object_detection_desktop_live.pbtxt
+     bazel-bin/object_detection_tpu --calculator_graph_config_file=mediapipe/examples/coral/graphs/object_detection_desktop_live.pbtxt
 
      # Face detection
      cd ~/mediapipe
-     chmod +x bazel-bin/face_detection_cpu
+     chmod +x bazel-bin/face_detection_tpu
      export GLOG_logtostderr=1
-     bazel-bin/face_detection_cpu --calculator_graph_config_file=mediapipe/examples/coral/graphs/face_detection_desktop_live.pbtxt
+     bazel-bin/face_detection_tpu --calculator_graph_config_file=mediapipe/examples/coral/graphs/face_detection_desktop_live.pbtxt
 

mediapipe/examples/coral/graphs/face_detection_desktop_live.pbtxt

@@ -1,6 +1,6 @@
-# MediaPipe graph that performs face detection with TensorFlow Lite on CPU.
+# MediaPipe graph that performs face detection with TensorFlow Lite on TPU.
 # Used in the examples in
-# mediapipe/examples/coral:face_detection_cpu.
+# mediapipe/examples/coral:face_detection_tpu.
 
 # Images on GPU coming into and out of the graph.
 input_stream: "input_video"
@@ -36,7 +36,7 @@ node {
 node: {
   calculator: "ImageTransformationCalculator"
   input_stream: "IMAGE:throttled_input_video"
-  output_stream: "IMAGE:transformed_input_video_cpu"
+  output_stream: "IMAGE:transformed_input_video"
   output_stream: "LETTERBOX_PADDING:letterbox_padding"
   options: {
     [mediapipe.ImageTransformationCalculatorOptions.ext] {
@@ -51,7 +51,7 @@ node: {
 # TfLiteTensor.
 node {
   calculator: "TfLiteConverterCalculator"
-  input_stream: "IMAGE:transformed_input_video_cpu"
+  input_stream: "IMAGE:transformed_input_video"
   output_stream: "TENSORS:image_tensor"
   options: {
     [mediapipe.TfLiteConverterCalculatorOptions.ext] {
@@ -60,7 +60,7 @@ node {
   }
 }
 
-# Runs a TensorFlow Lite model on CPU that takes an image tensor and outputs a
+# Runs a TensorFlow Lite model on TPU that takes an image tensor and outputs a
 # vector of tensors representing, for instance, detection boxes/keypoints and
 # scores.
 node {

mediapipe/examples/coral/graphs/object_detection_desktop_live.pbtxt

@@ -1,8 +1,8 @@
-# MediaPipe graph that performs object detection with TensorFlow Lite on CPU.
+# MediaPipe graph that performs object detection with TensorFlow Lite on TPU.
 # Used in the examples in
-# mediapipie/examples/coral:object_detection_cpu.
+# mediapipie/examples/coral:object_detection_tpu.
 
-# Images on CPU coming into and out of the graph.
+# Images on TPU coming into and out of the graph.
 input_stream: "input_video"
 output_stream: "output_video"
 
@@ -30,7 +30,7 @@ node {
   output_stream: "throttled_input_video"
 }
 
-# Transforms the input image on CPU to a 320x320 image. To scale the image, by
+# Transforms the input image on CPU to a 300x300 image. To scale the image, by
 # default it uses the STRETCH scale mode that maps the entire input image to the
 # entire transformed image. As a result, image aspect ratio may be changed and
 # objects in the image may be deformed (stretched or squeezed), but the object
@@ -60,7 +60,7 @@ node {
   }
 }
 
-# Runs a TensorFlow Lite model on CPU that takes an image tensor and outputs a
+# Runs a TensorFlow Lite model on TPU that takes an image tensor and outputs a
 # vector of tensors representing, for instance, detection boxes/keypoints and
 # scores.
 node {

mediapipe/examples/desktop/youtube8m/generate_vggish_frozen_graph.py

@@ -25,7 +25,7 @@ import sys
 
 from absl import app
 import tensorflow.compat.v1 as tf
-from tensorflow.python.tools import freeze_graph
+from tensorflow.compat.v1.python.tools import freeze_graph
 
 BASE_DIR = '/tmp/mediapipe/'
 

mediapipe/framework/BUILD

@@ -536,6 +536,7 @@ cc_library(
         "//mediapipe/framework/profiler:graph_profiler",
         "//mediapipe/framework/stream_handler:default_input_stream_handler",
         "//mediapipe/framework/stream_handler:in_order_output_stream_handler",
+        "//mediapipe/framework/tool:name_util",
         "//mediapipe/framework/tool:status_util",
         "//mediapipe/framework/tool:tag_map",
         "//mediapipe/framework/tool:validate_name",
@@ -1268,6 +1269,7 @@ cc_library(
         "//mediapipe/framework/port:source_location",
         "//mediapipe/framework/port:status",
         "//mediapipe/framework/port:topologicalsorter",
+        "//mediapipe/framework/tool:name_util",
         "//mediapipe/framework/tool:status_util",
         "//mediapipe/framework/tool:subgraph_expansion",
         "//mediapipe/framework/tool:validate",

mediapipe/framework/calculator_context_manager.h

@@ -50,7 +50,7 @@ class CalculatorContextManager {
           setup_shards_callback);
 
   // Invoked by CalculatorNode::CleanupAfterRun().
-  void CleanupAfterRun() LOCKS_EXCLUDED(contexts_mutex_);
+  void CleanupAfterRun() ABSL_LOCKS_EXCLUDED(contexts_mutex_);
 
   // Returns true if the default calculator context has been initialized.
   bool HasDefaultCalculatorContext() const {
@@ -66,7 +66,7 @@ class CalculatorContextManager {
   // The input timestamp of the calculator context is returned in
   // *context_input_timestamp.
   CalculatorContext* GetFrontCalculatorContext(
-      Timestamp* context_input_timestamp) LOCKS_EXCLUDED(contexts_mutex_);
+      Timestamp* context_input_timestamp) ABSL_LOCKS_EXCLUDED(contexts_mutex_);
 
   // For sequential execution, returns a pointer to the default calculator
   // context. For parallel execution, creates or reuses a calculator context,
@@ -75,16 +75,16 @@ class CalculatorContextManager {
   // The ownership of the calculator context object isn't tranferred to the
   // caller.
   CalculatorContext* PrepareCalculatorContext(Timestamp input_timestamp)
-      LOCKS_EXCLUDED(contexts_mutex_);
+      ABSL_LOCKS_EXCLUDED(contexts_mutex_);
 
   // Removes the context with the smallest input timestamp from active_contexts_
   // and moves the calculator context to idle_contexts_. The caller must
   // guarantee that the output shards in the calculator context have been
   // propagated before calling this function.
-  void RecycleCalculatorContext() LOCKS_EXCLUDED(contexts_mutex_);
+  void RecycleCalculatorContext() ABSL_LOCKS_EXCLUDED(contexts_mutex_);
 
   // Returns true if active_contexts_ is non-empty.
-  bool HasActiveContexts() LOCKS_EXCLUDED(contexts_mutex_);
+  bool HasActiveContexts() ABSL_LOCKS_EXCLUDED(contexts_mutex_);
 
   int NumberOfContextTimestamps(
       const CalculatorContext& calculator_context) const {
@@ -135,10 +135,10 @@ class CalculatorContextManager {
   absl::Mutex contexts_mutex_;
   // A map from input timestamps to calculator contexts.
   std::map<Timestamp, std::unique_ptr<CalculatorContext>> active_contexts_
-      GUARDED_BY(contexts_mutex_);
+      ABSL_GUARDED_BY(contexts_mutex_);
   // Idle calculator contexts that are ready for reuse.
   std::deque<std::unique_ptr<CalculatorContext>> idle_contexts_
-      GUARDED_BY(contexts_mutex_);
+      ABSL_GUARDED_BY(contexts_mutex_);
 };
 
 }  // namespace mediapipe

mediapipe/framework/calculator_graph.cc

@@ -127,7 +127,13 @@ CalculatorGraph::CalculatorGraph(const CalculatorGraphConfig& config)
 // Defining the destructor here lets us use incomplete types in the header;
 // they only need to be fully visible here, where their destructor is
 // instantiated.
-CalculatorGraph::~CalculatorGraph() {}
+CalculatorGraph::~CalculatorGraph() {
+  // Stop periodic profiler output to ublock Executor destructors.
+  ::mediapipe::Status status = profiler()->Stop();
+  if (!status.ok()) {
+    LOG(ERROR) << "During graph destruction: " << status;
+  }
+}
 
 ::mediapipe::Status CalculatorGraph::InitializePacketGeneratorGraph(
     const std::map<std::string, Packet>& side_packets) {

mediapipe/framework/calculator_graph.h

@@ -298,7 +298,7 @@ class CalculatorGraph {
   // Callback when an error is encountered.
   // Adds the error to the vector of errors.
   void RecordError(const ::mediapipe::Status& error)
-      LOCKS_EXCLUDED(error_mutex_);
+      ABSL_LOCKS_EXCLUDED(error_mutex_);
 
   // Returns the maximum input stream queue size.
   int GetMaxInputStreamQueueSize();
@@ -339,13 +339,14 @@ class CalculatorGraph {
 
   // Returns true if this node or graph input stream is connected to
   // any input stream whose queue has hit maximum capacity.
-  bool IsNodeThrottled(int node_id) LOCKS_EXCLUDED(full_input_streams_mutex_);
+  bool IsNodeThrottled(int node_id)
+      ABSL_LOCKS_EXCLUDED(full_input_streams_mutex_);
 
   // If any active source node or graph input stream is throttled and not yet
   // closed, increases the max_queue_size for each full input stream in the
   // graph.
   // Returns true if at least one max_queue_size has been grown.
-  bool UnthrottleSources() LOCKS_EXCLUDED(full_input_streams_mutex_);
+  bool UnthrottleSources() ABSL_LOCKS_EXCLUDED(full_input_streams_mutex_);
 
   // Returns the scheduler's runtime measures for overhead measurement.
   // Only meant for test purposes.
@@ -498,7 +499,7 @@ class CalculatorGraph {
   // handler fails, it appends its error to errors_, and CleanupAfterRun sets
   // |*status| to the new combined errors on return.
   void CleanupAfterRun(::mediapipe::Status* status)
-      LOCKS_EXCLUDED(error_mutex_);
+      ABSL_LOCKS_EXCLUDED(error_mutex_);
 
   // Combines errors into a status. Returns true if the vector of errors is
   // non-empty.
@@ -571,7 +572,7 @@ class CalculatorGraph {
   // Mode for adding packets to a graph input stream. Set to block until all
   // affected input streams are not full by default.
   GraphInputStreamAddMode graph_input_stream_add_mode_
-      GUARDED_BY(full_input_streams_mutex_);
+      ABSL_GUARDED_BY(full_input_streams_mutex_);
 
   // For a source node or graph input stream (specified using id),
   // this stores the set of dependent input streams that have hit their
@@ -580,7 +581,7 @@ class CalculatorGraph {
   // is added to a graph input stream only if this set is empty.
   // Note that this vector contains an unused entry for each non-source node.
   std::vector<absl::flat_hash_set<InputStreamManager*>> full_input_streams_
-      GUARDED_BY(full_input_streams_mutex_);
+      ABSL_GUARDED_BY(full_input_streams_mutex_);
 
   // Maps stream names to graph input stream objects.
   absl::flat_hash_map<std::string, std::unique_ptr<GraphInputStream>>
@@ -606,7 +607,7 @@ class CalculatorGraph {
 
   // Vector of errors encountered while running graph. Always use RecordError()
   // to add an error to this vector.
-  std::vector<::mediapipe::Status> errors_ GUARDED_BY(error_mutex_);
+  std::vector<::mediapipe::Status> errors_ ABSL_GUARDED_BY(error_mutex_);
 
   // True if the default executor uses the application thread.
   bool use_application_thread_ = false;
@@ -614,7 +615,7 @@ class CalculatorGraph {
   // Condition variable that waits until all input streams that depend on a
   // graph input stream are below the maximum queue size.
   absl::CondVar wait_to_add_packet_cond_var_
-      GUARDED_BY(full_input_streams_mutex_);
+      ABSL_GUARDED_BY(full_input_streams_mutex_);
 
   // Mutex for the vector of errors.
   absl::Mutex error_mutex_;

mediapipe/framework/calculator_graph_event_loop_test.cc

@@ -44,7 +44,7 @@ class CalculatorGraphEventLoopTest : public testing::Test {
   }
 
  protected:
-  std::vector<Packet> output_packets_ GUARDED_BY(output_packets_mutex_);
+  std::vector<Packet> output_packets_ ABSL_GUARDED_BY(output_packets_mutex_);
   absl::Mutex output_packets_mutex_;
 };
 

mediapipe/framework/calculator_node.cc

@@ -42,6 +42,7 @@
 #include "mediapipe/framework/port/source_location.h"
 #include "mediapipe/framework/port/status_builder.h"
 #include "mediapipe/framework/timestamp.h"
+#include "mediapipe/framework/tool/name_util.h"
 #include "mediapipe/framework/tool/status_util.h"
 #include "mediapipe/framework/tool/tag_map.h"
 #include "mediapipe/framework/tool/validate_name.h"
@@ -85,7 +86,7 @@ Timestamp CalculatorNode::SourceProcessOrder(
 
   const CalculatorGraphConfig::Node& node_config =
       validated_graph_->Config().node(node_id_);
-  name_ = CanonicalNodeName(validated_graph_->Config(), node_id_);
+  name_ = tool::CanonicalNodeName(validated_graph_->Config(), node_id_);
 
   max_in_flight_ = node_config.max_in_flight();
   max_in_flight_ = max_in_flight_ ? max_in_flight_ : 1;

mediapipe/framework/calculator_node.h

@@ -128,25 +128,25 @@ class CalculatorNode {
       std::function<void()> source_node_opened_callback,
       std::function<void(CalculatorContext*)> schedule_callback,
       std::function<void(::mediapipe::Status)> error_callback,
-      CounterFactory* counter_factory) LOCKS_EXCLUDED(status_mutex_);
+      CounterFactory* counter_factory) ABSL_LOCKS_EXCLUDED(status_mutex_);
   // Opens the node.
-  ::mediapipe::Status OpenNode() LOCKS_EXCLUDED(status_mutex_);
+  ::mediapipe::Status OpenNode() ABSL_LOCKS_EXCLUDED(status_mutex_);
   // Called when a source node's layer becomes active.
-  void ActivateNode() LOCKS_EXCLUDED(status_mutex_);
+  void ActivateNode() ABSL_LOCKS_EXCLUDED(status_mutex_);
   // Cleans up the node after the CalculatorGraph has been run. Deletes
   // the Calculator managed by this node. graph_status is the status of
   // the graph run.
   void CleanupAfterRun(const ::mediapipe::Status& graph_status)
-      LOCKS_EXCLUDED(status_mutex_);
+      ABSL_LOCKS_EXCLUDED(status_mutex_);
 
   // Returns true iff PrepareForRun() has been called (and types verified).
-  bool Prepared() const LOCKS_EXCLUDED(status_mutex_);
+  bool Prepared() const ABSL_LOCKS_EXCLUDED(status_mutex_);
   // Returns true iff Open() has been called on the calculator.
-  bool Opened() const LOCKS_EXCLUDED(status_mutex_);
+  bool Opened() const ABSL_LOCKS_EXCLUDED(status_mutex_);
   // Returns true iff a source calculator's layer is active.
-  bool Active() const LOCKS_EXCLUDED(status_mutex_);
+  bool Active() const ABSL_LOCKS_EXCLUDED(status_mutex_);
   // Returns true iff Close() has been called on the calculator.
-  bool Closed() const LOCKS_EXCLUDED(status_mutex_);
+  bool Closed() const ABSL_LOCKS_EXCLUDED(status_mutex_);
 
   // Returns true iff this is a source node.
   //
@@ -166,32 +166,32 @@ class CalculatorNode {
   // then call EndScheduling when finished running it.
   // If false is returned, the scheduler must not execute the node.
   // This method is thread-safe.
-  bool TryToBeginScheduling() LOCKS_EXCLUDED(status_mutex_);
+  bool TryToBeginScheduling() ABSL_LOCKS_EXCLUDED(status_mutex_);
 
   // Subtracts one from current_in_flight_ to allow a new invocation to be
   // scheduled. Then, it checks scheduling_state_ and invokes SchedulingLoop()
   // if necessary. This method is thread-safe.
   // TODO: this could be done implicitly by the call to ProcessNode
   // or CloseNode.
-  void EndScheduling() LOCKS_EXCLUDED(status_mutex_);
+  void EndScheduling() ABSL_LOCKS_EXCLUDED(status_mutex_);
 
   // Returns true if OpenNode() can be scheduled.
-  bool ReadyForOpen() const LOCKS_EXCLUDED(status_mutex_);
+  bool ReadyForOpen() const ABSL_LOCKS_EXCLUDED(status_mutex_);
 
   // Called by the InputStreamHandler when all the input stream headers
   // become available.
-  void InputStreamHeadersReady() LOCKS_EXCLUDED(status_mutex_);
+  void InputStreamHeadersReady() ABSL_LOCKS_EXCLUDED(status_mutex_);
 
   // Called by the InputSidePacketHandler when all the input side packets
   // become available.
-  void InputSidePacketsReady() LOCKS_EXCLUDED(status_mutex_);
+  void InputSidePacketsReady() ABSL_LOCKS_EXCLUDED(status_mutex_);
 
   // Checks scheduling_state_, and then invokes SchedulingLoop() if necessary.
   // This method is thread-safe.
-  void CheckIfBecameReady() LOCKS_EXCLUDED(status_mutex_);
+  void CheckIfBecameReady() ABSL_LOCKS_EXCLUDED(status_mutex_);
 
   // Called by SchedulerQueue when a node is opened.
-  void NodeOpened() LOCKS_EXCLUDED(status_mutex_);
+  void NodeOpened() ABSL_LOCKS_EXCLUDED(status_mutex_);
 
   // Returns whether this is a GPU calculator node.
   bool UsesGpu() const { return uses_gpu_; }
@@ -220,7 +220,7 @@ class CalculatorNode {
   // indicates whether the graph run has ended.
   ::mediapipe::Status CloseNode(const ::mediapipe::Status& graph_status,
                                 bool graph_run_ended)
-      LOCKS_EXCLUDED(status_mutex_);
+      ABSL_LOCKS_EXCLUDED(status_mutex_);
 
   // Returns a pointer to the default calculator context that is used for
   // sequential execution. A source node should always reuse its default
@@ -274,9 +274,9 @@ class CalculatorNode {
   void SchedulingLoop();
 
   // Closes the input and output streams.
-  void CloseInputStreams() LOCKS_EXCLUDED(status_mutex_);
+  void CloseInputStreams() ABSL_LOCKS_EXCLUDED(status_mutex_);
   void CloseOutputStreams(OutputStreamShardSet* outputs)
-      LOCKS_EXCLUDED(status_mutex_);
+      ABSL_LOCKS_EXCLUDED(status_mutex_);
   // Get a std::string describing the input streams.
   std::string DebugInputStreamNames() const;
 
@@ -304,7 +304,7 @@ class CalculatorNode {
     kStateActive = 3,
     kStateClosed = 4
   };
-  NodeStatus status_ GUARDED_BY(status_mutex_){kStateUninitialized};
+  NodeStatus status_ ABSL_GUARDED_BY(status_mutex_){kStateUninitialized};
 
   // The max number of invocations that can be scheduled in parallel.
   int max_in_flight_ = 1;
@@ -312,7 +312,7 @@ class CalculatorNode {
   // scheduling.
   //
   // The number of invocations that are scheduled but not finished.
-  int current_in_flight_ GUARDED_BY(status_mutex_) = 0;
+  int current_in_flight_ ABSL_GUARDED_BY(status_mutex_) = 0;
   // SchedulingState incidates the current state of the node scheduling process.
   // There are four possible transitions:
   // (a) From kIdle to kScheduling.
@@ -333,14 +333,15 @@ class CalculatorNode {
     kScheduling = 1,  //
     kSchedulingPending = 2
   };
-  SchedulingState scheduling_state_ GUARDED_BY(status_mutex_) = kIdle;
+  SchedulingState scheduling_state_ ABSL_GUARDED_BY(status_mutex_) = kIdle;
 
   std::function<void()> ready_for_open_callback_;
   std::function<void()> source_node_opened_callback_;
-  bool input_stream_headers_ready_called_ GUARDED_BY(status_mutex_) = false;
+  bool input_stream_headers_ready_called_ ABSL_GUARDED_BY(status_mutex_) =
-  bool input_side_packets_ready_called_ GUARDED_BY(status_mutex_) = false;
+      false;
-  bool input_stream_headers_ready_ GUARDED_BY(status_mutex_) = false;
+  bool input_side_packets_ready_called_ ABSL_GUARDED_BY(status_mutex_) = false;
-  bool input_side_packets_ready_ GUARDED_BY(status_mutex_) = false;
+  bool input_stream_headers_ready_ ABSL_GUARDED_BY(status_mutex_) = false;
+  bool input_side_packets_ready_ ABSL_GUARDED_BY(status_mutex_) = false;
 
   // Owns and manages all CalculatorContext objects.
   CalculatorContextManager calculator_context_manager_;

mediapipe/framework/calculator_parallel_execution_test.cc

@@ -85,7 +85,7 @@ class ParallelExecutionTest : public testing::Test {
   }
 
  protected:
-  std::vector<Packet> output_packets_ GUARDED_BY(output_packets_mutex_);
+  std::vector<Packet> output_packets_ ABSL_GUARDED_BY(output_packets_mutex_);
   absl::Mutex output_packets_mutex_;
 };
 

mediapipe/framework/counter_factory.cc

@@ -29,35 +29,35 @@ class BasicCounter : public Counter {
  public:
   explicit BasicCounter(const std::string& name) : value_(0) {}
 
-  void Increment() LOCKS_EXCLUDED(mu_) override {
+  void Increment() ABSL_LOCKS_EXCLUDED(mu_) override {
     absl::WriterMutexLock lock(&mu_);
     ++value_;
   }
 
-  void IncrementBy(int amount) LOCKS_EXCLUDED(mu_) override {
+  void IncrementBy(int amount) ABSL_LOCKS_EXCLUDED(mu_) override {
     absl::WriterMutexLock lock(&mu_);
     value_ += amount;
   }
 
-  int64 Get() LOCKS_EXCLUDED(mu_) override {
+  int64 Get() ABSL_LOCKS_EXCLUDED(mu_) override {
     absl::ReaderMutexLock lock(&mu_);
     return value_;
   }
 
  private:
   absl::Mutex mu_;
-  int64 value_ GUARDED_BY(mu_);
+  int64 value_ ABSL_GUARDED_BY(mu_);
 };
 
 }  // namespace
 
 CounterSet::CounterSet() {}
 
-CounterSet::~CounterSet() LOCKS_EXCLUDED(mu_) { PublishCounters(); }
+CounterSet::~CounterSet() ABSL_LOCKS_EXCLUDED(mu_) { PublishCounters(); }
 
-void CounterSet::PublishCounters() LOCKS_EXCLUDED(mu_) {}
+void CounterSet::PublishCounters() ABSL_LOCKS_EXCLUDED(mu_) {}
 
-void CounterSet::PrintCounters() LOCKS_EXCLUDED(mu_) {
+void CounterSet::PrintCounters() ABSL_LOCKS_EXCLUDED(mu_) {
   absl::ReaderMutexLock lock(&mu_);
   LOG_IF(INFO, !counters_.empty()) << "MediaPipe Counters:";
   for (const auto& counter : counters_) {
@@ -65,7 +65,7 @@ void CounterSet::PrintCounters() LOCKS_EXCLUDED(mu_) {
   }
 }
 
-Counter* CounterSet::Get(const std::string& name) LOCKS_EXCLUDED(mu_) {
+Counter* CounterSet::Get(const std::string& name) ABSL_LOCKS_EXCLUDED(mu_) {
   absl::ReaderMutexLock lock(&mu_);
   if (!::mediapipe::ContainsKey(counters_, name)) {
     return nullptr;
@@ -74,7 +74,7 @@ Counter* CounterSet::Get(const std::string& name) LOCKS_EXCLUDED(mu_) {
 }
 
 std::map<std::string, int64> CounterSet::GetCountersValues()
-    LOCKS_EXCLUDED(mu_) {
+    ABSL_LOCKS_EXCLUDED(mu_) {
   absl::ReaderMutexLock lock(&mu_);
   std::map<std::string, int64> result;
   for (const auto& it : counters_) {

mediapipe/framework/counter_factory.h

@@ -51,7 +51,7 @@ class CounterSet {
   // to the existing pointer.
   template <typename CounterType, typename... Args>
   Counter* Emplace(const std::string& name, Args&&... args)
-      LOCKS_EXCLUDED(mu_) {
+      ABSL_LOCKS_EXCLUDED(mu_) {
     absl::WriterMutexLock lock(&mu_);
     std::unique_ptr<Counter>* existing_counter = FindOrNull(counters_, name);
     if (existing_counter) {
@@ -66,11 +66,12 @@ class CounterSet {
   Counter* Get(const std::string& name);
 
   // Retrieves all counters names and current values from the internal map.
-  std::map<std::string, int64> GetCountersValues() LOCKS_EXCLUDED(mu_);
+  std::map<std::string, int64> GetCountersValues() ABSL_LOCKS_EXCLUDED(mu_);
 
  private:
   absl::Mutex mu_;
-  std::map<std::string, std::unique_ptr<Counter>> counters_ GUARDED_BY(mu_);
+  std::map<std::string, std::unique_ptr<Counter>> counters_
+      ABSL_GUARDED_BY(mu_);
 };
 
 // Generic counter factory

mediapipe/framework/deps/BUILD

@@ -175,6 +175,7 @@ cc_library(
     name = "random",
     hdrs = ["random_base.h"],
     visibility = ["//visibility:public"],
+    deps = ["//mediapipe/framework/port:integral_types"],
 )
 
 cc_library(

mediapipe/framework/deps/monotonic_clock.cc

@@ -33,7 +33,7 @@ struct MonotonicClock::State {
   Clock* raw_clock;
   absl::Mutex lock;
   // The largest time ever returned by Now().
-  absl::Time max_time GUARDED_BY(lock);
+  absl::Time max_time ABSL_GUARDED_BY(lock);
   explicit State(Clock* clock)
       : raw_clock(clock), max_time(absl::UnixEpoch()) {}
 };
@@ -171,13 +171,13 @@ class MonotonicClockImpl : public MonotonicClock {
   // last_raw_time_ remembers the last value obtained from raw_clock_.
   // It prevents spurious calls to ReportCorrection when time moves
   // forward by a smaller amount than a prior backward jump.
-  absl::Time last_raw_time_ GUARDED_BY(state_->lock);
+  absl::Time last_raw_time_ ABSL_GUARDED_BY(state_->lock);
 
   // Variables that keep track of time corrections made by this instance of
   // MonotonicClock.  (All such metrics are instance-local for reasons
   // described earlier.)
-  int correction_count_ GUARDED_BY(state_->lock);
+  int correction_count_ ABSL_GUARDED_BY(state_->lock);
-  absl::Duration max_correction_ GUARDED_BY(state_->lock);
+  absl::Duration max_correction_ ABSL_GUARDED_BY(state_->lock);
 };
 
 // Factory methods.

mediapipe/framework/deps/monotonic_clock_test.cc

@@ -456,7 +456,7 @@ class ClockFrenzy {
 
   // Provide a lock to avoid race conditions in non-threadsafe ACMRandom.
   mutable absl::Mutex lock_;
-  std::unique_ptr<RandomEngine> random_ GUARDED_BY(lock_);
+  std::unique_ptr<RandomEngine> random_ ABSL_GUARDED_BY(lock_);
 
   // The stopping notification.
   bool running_;

mediapipe/framework/deps/random_base.h

@@ -15,6 +15,8 @@
 #ifndef MEDIAPIPE_DEPS_RANDOM_BASE_H_
 #define MEDIAPIPE_DEPS_RANDOM_BASE_H_
 
+#include "mediapipe/framework/port/integral_types.h"
+
 class RandomBase {
  public:
   // constructors.  Don't do too much.
@@ -22,7 +24,8 @@ class RandomBase {
   virtual ~RandomBase();
 
   virtual float RandFloat() { return 0; }
-  virtual int UnbiasedUniform(int n) { return n - 1; }
+  virtual int UnbiasedUniform(int n) { return 0; }
+  virtual uint64 UnbiasedUniform64(uint64 n) { return 0; }
 };
 
 #endif  // MEDIAPIPE_DEPS_RANDOM_BASE_H_

mediapipe/framework/deps/registration.h

@@ -159,7 +159,7 @@ class FunctionRegistry {
   FunctionRegistry& operator=(const FunctionRegistry&) = delete;
 
   RegistrationToken Register(const std::string& name, Function func)
-      LOCKS_EXCLUDED(lock_) {
+      ABSL_LOCKS_EXCLUDED(lock_) {
     std::string normalized_name = GetNormalizedName(name);
     absl::WriterMutexLock lock(&lock_);
     std::string adjusted_name = GetAdjustedName(normalized_name);
@@ -189,7 +189,7 @@ class FunctionRegistry {
                                                   std::tuple<Args...>>::value,
                               int> = 0>
   ReturnType Invoke(const std::string& name, Args2&&... args)
-      LOCKS_EXCLUDED(lock_) {
+      ABSL_LOCKS_EXCLUDED(lock_) {
     Function function;
     {
       absl::ReaderMutexLock lock(&lock_);
@@ -207,14 +207,14 @@ class FunctionRegistry {
   // Namespaces in |name| and |ns| are separated by kNameSep.
   template <typename... Args2>
   ReturnType Invoke(const std::string& ns, const std::string& name,
-                    Args2&&... args) LOCKS_EXCLUDED(lock_) {
+                    Args2&&... args) ABSL_LOCKS_EXCLUDED(lock_) {
     return Invoke(GetQualifiedName(ns, name), args...);
   }
 
   // Note that it's possible for registered implementations to be subsequently
   // unregistered, though this will never happen with registrations made via
   // MEDIAPIPE_REGISTER_FACTORY_FUNCTION.
-  bool IsRegistered(const std::string& name) const LOCKS_EXCLUDED(lock_) {
+  bool IsRegistered(const std::string& name) const ABSL_LOCKS_EXCLUDED(lock_) {
     absl::ReaderMutexLock lock(&lock_);
     return functions_.count(name) != 0;
   }
@@ -222,7 +222,7 @@ class FunctionRegistry {
   // Returns true if the specified factory function is available.
   // Namespaces in |name| and |ns| are separated by kNameSep.
   bool IsRegistered(const std::string& ns, const std::string& name) const
-      LOCKS_EXCLUDED(lock_) {
+      ABSL_LOCKS_EXCLUDED(lock_) {
     return IsRegistered(GetQualifiedName(ns, name));
   }
 
@@ -231,7 +231,7 @@ class FunctionRegistry {
   // unregistered, though this will never happen with registrations made via
   // MEDIAPIPE_REGISTER_FACTORY_FUNCTION.
   std::unordered_set<std::string> GetRegisteredNames() const
-      LOCKS_EXCLUDED(lock_) {
+      ABSL_LOCKS_EXCLUDED(lock_) {
     absl::ReaderMutexLock lock(&lock_);
     std::unordered_set<std::string> names;
     std::for_each(functions_.cbegin(), functions_.cend(),
@@ -287,7 +287,7 @@ class FunctionRegistry {
 
  private:
   mutable absl::Mutex lock_;
-  std::unordered_map<std::string, Function> functions_ GUARDED_BY(lock_);
+  std::unordered_map<std::string, Function> functions_ ABSL_GUARDED_BY(lock_);
 
   // For names included in NamespaceWhitelist, strips the namespace.
   std::string GetAdjustedName(const std::string& name) {

mediapipe/framework/deps/threadpool.h

@@ -93,8 +93,8 @@ class ThreadPool {
 
   absl::Mutex mutex_;
   absl::CondVar condition_;
-  bool stopped_ GUARDED_BY(mutex_) = false;
+  bool stopped_ ABSL_GUARDED_BY(mutex_) = false;
-  std::deque<std::function<void()>> tasks_ GUARDED_BY(mutex_);
+  std::deque<std::function<void()>> tasks_ ABSL_GUARDED_BY(mutex_);
 
   ThreadOptions thread_options_;
 };

mediapipe/framework/encode_binary_proto.bzl

@@ -87,6 +87,7 @@ def _encode_binary_proto_impl(ctx):
                 ctx.executable._proto_compiler.path,
                 "--encode=" + ctx.attr.message_type,
                 "--proto_path=" + ctx.genfiles_dir.path,
+                "--proto_path=" + ctx.bin_dir.path,
                 "--proto_path=.",
             ] + path_list + file_list +
             ["<", textpb.path, ">", binarypb.path],
@@ -136,6 +137,7 @@ def _generate_proto_descriptor_set_impl(ctx):
         arguments = [
                         "--descriptor_set_out=%s" % descriptor.path,
                         "--proto_path=" + ctx.genfiles_dir.path,
+                        "--proto_path=" + ctx.bin_dir.path,
                         "--proto_path=.",
                     ] +
                     [s.path for s in all_protos.to_list()],

mediapipe/framework/graph_output_stream.h

@@ -163,8 +163,8 @@ class OutputStreamPollerImpl : public GraphOutputStream {
 
  private:
   absl::Mutex mutex_;
-  absl::CondVar handler_condvar_ GUARDED_BY(mutex_);
+  absl::CondVar handler_condvar_ ABSL_GUARDED_BY(mutex_);
-  bool graph_has_error_ GUARDED_BY(mutex_);
+  bool graph_has_error_ ABSL_GUARDED_BY(mutex_);
 };
 
 }  // namespace internal

mediapipe/framework/graph_validation_test.cc

@@ -94,6 +94,7 @@ TEST(GraphValidationTest, InitializeGraphFromProtos) {
         }
         node {
           calculator: "PassThroughCalculator"
+          name: "passthroughgraph__PassThroughCalculator"
           input_stream: "stream_2"
           output_stream: "stream_3"
         }
@@ -201,7 +202,7 @@ TEST(GraphValidationTest, InitializeTemplateFromProtos) {
           output_stream: "stream_2"
         }
         node {
-          name: "__sg0_stream_8"
+          name: "passthroughgraph__stream_8"
           calculator: "PassThroughCalculator"
           input_stream: "stream_2"
           output_stream: "stream_3"
@@ -263,6 +264,7 @@ TEST(GraphValidationTest, OptionalSubgraphStreams) {
         }
         node {
           calculator: "PassThroughCalculator"
+          name: "passthroughgraph__PassThroughCalculator"
           input_stream: "foo_bar"
           output_stream: "foo_out"
         }
@@ -379,6 +381,7 @@ TEST(GraphValidationTest, OptionalInputNotProvidedForSubgraphCalculator) {
         output_stream: "OUTPUT:foo_out"
         node {
           calculator: "OptionalSideInputTestCalculator"
+          name: "passthroughgraph__OptionalSideInputTestCalculator"
           output_stream: "OUTPUT:foo_out"
         }
         executor {}

mediapipe/framework/input_stream_manager.cc

@@ -233,7 +233,7 @@ Timestamp InputStreamManager::MinTimestampOrBound(bool* is_empty) const {
 }
 
 Timestamp InputStreamManager::MinTimestampOrBoundHelper() const
-    EXCLUSIVE_LOCKS_REQUIRED(stream_mutex_) {
+    ABSL_EXCLUSIVE_LOCKS_REQUIRED(stream_mutex_) {
   return queue_.empty() ? next_timestamp_bound_ : queue_.front().Timestamp();
 }
 

mediapipe/framework/input_stream_manager.h

@@ -73,7 +73,7 @@ class InputStreamManager {
 
   // Reset the input stream for another run of the graph (i.e. another
   // image/video/audio).
-  void PrepareForRun() LOCKS_EXCLUDED(stream_mutex_);
+  void PrepareForRun() ABSL_LOCKS_EXCLUDED(stream_mutex_);
 
   // Adds a list of timestamped packets. Sets "notify" to true if the queue
   // becomes non-empty. Does nothing if the input stream is closed.
@@ -96,7 +96,7 @@ class InputStreamManager {
   ::mediapipe::Status MovePackets(std::list<Packet>* container, bool* notify);
 
   // Closes the input stream.  This function can be called multiple times.
-  void Close() LOCKS_EXCLUDED(stream_mutex_);
+  void Close() ABSL_LOCKS_EXCLUDED(stream_mutex_);
 
   // Sets the bound on the next timestamp to be added to the input stream.
   // Sets "notify" to true if the bound is advanced while the packet queue is
@@ -104,24 +104,24 @@ class InputStreamManager {
   // DisableTimestamps() is called. Does nothing if the input stream is
   // closed.
   ::mediapipe::Status SetNextTimestampBound(Timestamp bound, bool* notify)
-      LOCKS_EXCLUDED(stream_mutex_);
+      ABSL_LOCKS_EXCLUDED(stream_mutex_);
 
   // Returns the smallest timestamp at which we might see an input in
   // this input stream. This is the timestamp of the first item in the queue if
   // the queue is non-empty, or the next timestamp bound if it is empty.
   // Sets is_empty to queue_.empty() if it is not nullptr.
   Timestamp MinTimestampOrBound(bool* is_empty) const
-      LOCKS_EXCLUDED(stream_mutex_);
+      ABSL_LOCKS_EXCLUDED(stream_mutex_);
 
   // Turns off the use of packet timestamps.
   void DisableTimestamps();
 
   // Returns true iff the queue is empty.
-  bool IsEmpty() const LOCKS_EXCLUDED(stream_mutex_);
+  bool IsEmpty() const ABSL_LOCKS_EXCLUDED(stream_mutex_);
 
   // If the queue is not empty, returns the packet at the front of the queue.
   // Otherwise, returns an empty packet.
-  Packet QueueHead() const LOCKS_EXCLUDED(stream_mutex_);
+  Packet QueueHead() const ABSL_LOCKS_EXCLUDED(stream_mutex_);
 
   // Advances time to timestamp.  Pops and returns the packet in the queue
   // with a matching timestamp, if it exists.  Time can be advanced to any
@@ -134,26 +134,26 @@ class InputStreamManager {
   // Timestamp::Done() after the pop.
   Packet PopPacketAtTimestamp(Timestamp timestamp, int* num_packets_dropped,
                               bool* stream_is_done)
-      LOCKS_EXCLUDED(stream_mutex_);
+      ABSL_LOCKS_EXCLUDED(stream_mutex_);
 
   // Pops and returns the packet at the head of the queue if the queue is
   // non-empty. Sets "stream_is_done" if  the next timestamp bound reaches
   // Timestamp::Done() after the pop.
-  Packet PopQueueHead(bool* stream_is_done) LOCKS_EXCLUDED(stream_mutex_);
+  Packet PopQueueHead(bool* stream_is_done) ABSL_LOCKS_EXCLUDED(stream_mutex_);
 
   // Returns the number of packets in the queue.
-  int QueueSize() const LOCKS_EXCLUDED(stream_mutex_);
+  int QueueSize() const ABSL_LOCKS_EXCLUDED(stream_mutex_);
 
   // Returns true iff the queue is full.
-  bool IsFull() const LOCKS_EXCLUDED(stream_mutex_);
+  bool IsFull() const ABSL_LOCKS_EXCLUDED(stream_mutex_);
 
   // Returns the max queue size. -1 indicates that there is no maximum.
-  int MaxQueueSize() const LOCKS_EXCLUDED(stream_mutex_);
+  int MaxQueueSize() const ABSL_LOCKS_EXCLUDED(stream_mutex_);
 
   // Sets the maximum queue size for the stream. Used to determine when the
   // callbacks for becomes_full and becomes_not_full should be invoked. A value
   // of -1 means that there is no maximum queue size.
-  void SetMaxQueueSize(int max_queue_size) LOCKS_EXCLUDED(stream_mutex_);
+  void SetMaxQueueSize(int max_queue_size) ABSL_LOCKS_EXCLUDED(stream_mutex_);
 
   // If there are equal to or more than n packets in the queue, this function
   // returns the min timestamp of among the latest n packets of the queue.  If
@@ -161,12 +161,12 @@ class InputStreamManager {
   // Timestamp::Unset().
   // NOTE: This is a public API intended for FixedSizeInputStreamHandler only.
   Timestamp GetMinTimestampAmongNLatest(int n) const
-      LOCKS_EXCLUDED(stream_mutex_);
+      ABSL_LOCKS_EXCLUDED(stream_mutex_);
 
   // pop_front()s packets that are earlier than the given timestamp.
   // NOTE: This is a public API intended for FixedSizeInputStreamHandler only.
   void ErasePacketsEarlierThan(Timestamp timestamp)
-      LOCKS_EXCLUDED(stream_mutex_);
+      ABSL_LOCKS_EXCLUDED(stream_mutex_);
 
   // If a maximum queue size is specified (!= -1), these callbacks that are
   // invoked when the input queue becomes full (>= max_queue_size_) or when it
@@ -184,24 +184,24 @@ class InputStreamManager {
   template <typename Container>
   ::mediapipe::Status AddOrMovePacketsInternal(Container container,
                                                bool* notify)
-      LOCKS_EXCLUDED(stream_mutex_);
+      ABSL_LOCKS_EXCLUDED(stream_mutex_);
 
   // Returns true if the next timestamp bound reaches Timestamp::Done().
-  bool IsDone() const EXCLUSIVE_LOCKS_REQUIRED(stream_mutex_);
+  bool IsDone() const ABSL_EXCLUSIVE_LOCKS_REQUIRED(stream_mutex_);
 
   // Returns the smallest timestamp at which this stream might see an input.
   Timestamp MinTimestampOrBoundHelper() const;
 
   mutable absl::Mutex stream_mutex_;
-  std::deque<Packet> queue_ GUARDED_BY(stream_mutex_);
+  std::deque<Packet> queue_ ABSL_GUARDED_BY(stream_mutex_);
   // The number of packets added to queue_.  Used to verify a packet at
   // Timestamp::PostStream() is the only Packet in the stream.
-  int64 num_packets_added_ GUARDED_BY(stream_mutex_);
+  int64 num_packets_added_ ABSL_GUARDED_BY(stream_mutex_);
-  Timestamp next_timestamp_bound_ GUARDED_BY(stream_mutex_);
+  Timestamp next_timestamp_bound_ ABSL_GUARDED_BY(stream_mutex_);
   // The |timestamp| argument passed to the last SelectAtTimestamp() call.
   // Ignored if enable_timestamps_ is false.
-  Timestamp last_select_timestamp_ GUARDED_BY(stream_mutex_);
+  Timestamp last_select_timestamp_ ABSL_GUARDED_BY(stream_mutex_);
-  bool closed_ GUARDED_BY(stream_mutex_);
+  bool closed_ ABSL_GUARDED_BY(stream_mutex_);
   // True if packet timestamps are used.
   bool enable_timestamps_ = true;
   std::string name_;
@@ -211,7 +211,7 @@ class InputStreamManager {
   Packet header_;
 
   // The maximum queue size for this stream if set.
-  int max_queue_size_ GUARDED_BY(stream_mutex_) = -1;
+  int max_queue_size_ ABSL_GUARDED_BY(stream_mutex_) = -1;
 
   // Callback to notify the framework that we have hit the maximum queue size.
   QueueSizeCallback becomes_full_callback_;

mediapipe/framework/output_stream_handler.h

@@ -92,7 +92,7 @@ class OutputStreamHandler {
   // resets data memebers.
   void PrepareForRun(
       const std::function<void(::mediapipe::Status)>& error_callback)
-      LOCKS_EXCLUDED(timestamp_mutex_);
+      ABSL_LOCKS_EXCLUDED(timestamp_mutex_);
 
   // Marks the output streams as started and propagates any changes made in
   // Calculator::Open().
@@ -106,10 +106,11 @@ class OutputStreamHandler {
   // Propagates timestamp directly if there is no ongoing parallel invocation.
   // Otherwise, updates task_timestamp_bound_.
   void UpdateTaskTimestampBound(Timestamp timestamp)
-      LOCKS_EXCLUDED(timestamp_mutex_);
+      ABSL_LOCKS_EXCLUDED(timestamp_mutex_);
 
   // Invoked after a call to Calculator::Process() function.
-  void PostProcess(Timestamp input_timestamp) LOCKS_EXCLUDED(timestamp_mutex_);
+  void PostProcess(Timestamp input_timestamp)
+      ABSL_LOCKS_EXCLUDED(timestamp_mutex_);
 
   // Propagates the output shards and closes all managed output streams.
   void Close(OutputStreamShardSet* output_shards);
@@ -133,7 +134,8 @@ class OutputStreamHandler {
                               OutputStreamShardSet* output_shards);
 
   // The packets and timestamp propagation logic for parallel execution.
-  virtual void PropagationLoop() EXCLUSIVE_LOCKS_REQUIRED(timestamp_mutex_) = 0;
+  virtual void PropagationLoop()
+      ABSL_EXCLUSIVE_LOCKS_REQUIRED(timestamp_mutex_) = 0;
 
   // Collection of all OutputStreamManager objects.
   OutputStreamManagerSet output_stream_managers_;
@@ -144,10 +146,11 @@ class OutputStreamHandler {
 
   absl::Mutex timestamp_mutex_;
   // A set of the completed input timestamps in ascending order.
-  std::set<Timestamp> completed_input_timestamps_ GUARDED_BY(timestamp_mutex_);
+  std::set<Timestamp> completed_input_timestamps_
+      ABSL_GUARDED_BY(timestamp_mutex_);
   // The current minimum timestamp for which a new packet could possibly arrive.
   // TODO: Rename the variable to be more descriptive.
-  Timestamp task_timestamp_bound_ GUARDED_BY(timestamp_mutex_);
+  Timestamp task_timestamp_bound_ ABSL_GUARDED_BY(timestamp_mutex_);
 
   // PropagateionState indicates the current state of the propagation process.
   // There are eight possible transitions:
@@ -187,7 +190,7 @@ class OutputStreamHandler {
     kPropagatingBound = 2,    //
     kPropagationPending = 3
   };
-  PropagationState propagation_state_ GUARDED_BY(timestamp_mutex_) = kIdle;
+  PropagationState propagation_state_ ABSL_GUARDED_BY(timestamp_mutex_) = kIdle;
 };
 
 using OutputStreamHandlerRegistry = GlobalFactoryRegistry<

mediapipe/framework/output_stream_manager.h

@@ -118,8 +118,8 @@ class OutputStreamManager {
   std::vector<Mirror> mirrors_;
 
   mutable absl::Mutex stream_mutex_;
-  Timestamp next_timestamp_bound_ GUARDED_BY(stream_mutex_);
+  Timestamp next_timestamp_bound_ ABSL_GUARDED_BY(stream_mutex_);
-  bool closed_ GUARDED_BY(stream_mutex_);
+  bool closed_ ABSL_GUARDED_BY(stream_mutex_);
 };
 
 }  // namespace mediapipe

mediapipe/framework/packet_generator_graph.cc

@@ -135,15 +135,15 @@ class GeneratorScheduler {
   void GenerateAndScheduleNext(int generator_index,
                                std::map<std::string, Packet>* side_packets,
                                std::unique_ptr<PacketSet> input_side_packet_set)
-      LOCKS_EXCLUDED(mutex_);
+      ABSL_LOCKS_EXCLUDED(mutex_);
 
   // Iterate through all generators in the config, scheduling any that
   // are runnable (and haven't been scheduled yet).
   void ScheduleAllRunnableGenerators(
-      std::map<std::string, Packet>* side_packets) LOCKS_EXCLUDED(mutex_);
+      std::map<std::string, Packet>* side_packets) ABSL_LOCKS_EXCLUDED(mutex_);
 
   // Waits until there are no pending tasks.
-  void WaitUntilIdle() LOCKS_EXCLUDED(mutex_);
+  void WaitUntilIdle() ABSL_LOCKS_EXCLUDED(mutex_);
 
   // Stores the indexes of the packet generators that were not scheduled (or
   // rather, not executed) in non_scheduled_generators. Returns the combined
@@ -158,26 +158,26 @@ class GeneratorScheduler {
 
   // Run all the application thread tasks (which are kept track of in
   // app_thread_tasks_).
-  void RunApplicationThreadTasks() LOCKS_EXCLUDED(app_thread_mutex_);
+  void RunApplicationThreadTasks() ABSL_LOCKS_EXCLUDED(app_thread_mutex_);
 
   const ValidatedGraphConfig* const validated_graph_;
   ::mediapipe::Executor* executor_;
 
   mutable absl::Mutex mutex_;
   // The number of pending tasks.
-  int num_tasks_ GUARDED_BY(mutex_) = 0;
+  int num_tasks_ ABSL_GUARDED_BY(mutex_) = 0;
   // This condition variable is signaled when num_tasks_ becomes 0.
   absl::CondVar idle_condvar_;
   // Accumulates the error statuses while running the packet generators.
-  std::vector<::mediapipe::Status> statuses_ GUARDED_BY(mutex_);
+  std::vector<::mediapipe::Status> statuses_ ABSL_GUARDED_BY(mutex_);
   // scheduled_generators_[i] is true if the packet generator with index i was
   // scheduled (or rather, executed).
-  std::vector<bool> scheduled_generators_ GUARDED_BY(mutex_);
+  std::vector<bool> scheduled_generators_ ABSL_GUARDED_BY(mutex_);
 
   absl::Mutex app_thread_mutex_;
   // Tasks to be executed on the application thread.
   std::deque<std::function<void()>> app_thread_tasks_
-      GUARDED_BY(app_thread_mutex_);
+      ABSL_GUARDED_BY(app_thread_mutex_);
   std::unique_ptr<internal::DelegatingExecutor> delegating_executor_;
 };
 

mediapipe/framework/profiler/BUILD

@@ -116,6 +116,7 @@ cc_library(
         "//mediapipe/framework/port:logging",
         "//mediapipe/framework/port:ret_check",
         "//mediapipe/framework/port:status",
+        "//mediapipe/framework/tool:name_util",
         "//mediapipe/framework/tool:tag_map",
         "//mediapipe/framework/tool:validate_name",
         "@com_google_absl//absl/memory",

mediapipe/framework/profiler/graph_profiler.cc

@@ -27,6 +27,7 @@
 #include "mediapipe/framework/port/ret_check.h"
 #include "mediapipe/framework/port/status.h"
 #include "mediapipe/framework/profiler/profiler_resource_util.h"
+#include "mediapipe/framework/tool/name_util.h"
 #include "mediapipe/framework/tool/tag_map.h"
 #include "mediapipe/framework/tool/validate_name.h"
 
@@ -133,7 +134,7 @@ void GraphProfiler::Initialize(
   for (int node_id = 0;
        node_id < validated_graph_config.CalculatorInfos().size(); ++node_id) {
     std::string node_name =
-        CanonicalNodeName(validated_graph_config.Config(), node_id);
+        tool::CanonicalNodeName(validated_graph_config.Config(), node_id);
     CalculatorProfile profile;
     profile.set_name(node_name);
     InitializeTimeHistogram(interval_size_usec, num_intervals,

mediapipe/framework/profiler/graph_profiler.h

@@ -122,15 +122,15 @@ class GraphProfiler : public std::enable_shared_from_this<ProfilingContext> {
   // the profiler disables itself and returns an empty stub if Initialize() is
   // called more than once.
   void Initialize(const ValidatedGraphConfig& validated_graph_config)
-      LOCKS_EXCLUDED(profiler_mutex_);
+      ABSL_LOCKS_EXCLUDED(profiler_mutex_);
 
   // Sets the profiler clock.
   void SetClock(const std::shared_ptr<mediapipe::Clock>& clock)
-      LOCKS_EXCLUDED(profiler_mutex_);
+      ABSL_LOCKS_EXCLUDED(profiler_mutex_);
 
   // Gets the profiler clock.
   const std::shared_ptr<mediapipe::Clock> GetClock() const
-      LOCKS_EXCLUDED(profiler_mutex_);
+      ABSL_LOCKS_EXCLUDED(profiler_mutex_);
 
   // Pauses profiling. No-op if already paused.
   void Pause();
@@ -138,7 +138,7 @@ class GraphProfiler : public std::enable_shared_from_this<ProfilingContext> {
   void Resume();
   // Resets cumulative profiling data. This only resets the information about
   // Process() and does NOT affect information for Open() and Close() methods.
-  void Reset() LOCKS_EXCLUDED(profiler_mutex_);
+  void Reset() ABSL_LOCKS_EXCLUDED(profiler_mutex_);
   // Begins profiling for a single graph run.
   ::mediapipe::Status Start(::mediapipe::Executor* executor);
   // Ends profiling for a single graph run.
@@ -150,8 +150,8 @@ class GraphProfiler : public std::enable_shared_from_this<ProfilingContext> {
   // Collects the runtime profile for Open(), Process(), and Close() of each
   // calculator in the graph. May be called at any time after the graph has been
   // initialized.
-  ::mediapipe::Status GetCalculatorProfiles(
+  ::mediapipe::Status GetCalculatorProfiles(std::vector<CalculatorProfile>*)
-      std::vector<CalculatorProfile>*) const LOCKS_EXCLUDED(profiler_mutex_);
+      const ABSL_LOCKS_EXCLUDED(profiler_mutex_);
 
   // Writes recent profiling and tracing data to a file specified in the
   // ProfilerConfig.  Includes events since the previous call to WriteProfile.
@@ -234,7 +234,7 @@ class GraphProfiler : public std::enable_shared_from_this<ProfilingContext> {
   // It is the responsibility of the caller to make sure the |timestamp_usec|
   // is valid for profiling.
   void AddPacketInfo(const TraceEvent& packet_info)
-      LOCKS_EXCLUDED(profiler_mutex_);
+      ABSL_LOCKS_EXCLUDED(profiler_mutex_);
   static void InitializeTimeHistogram(int64 interval_size_usec,
                                       int64 num_intervals,
                                       TimeHistogram* histogram);
@@ -273,10 +273,10 @@ class GraphProfiler : public std::enable_shared_from_this<ProfilingContext> {
 
   void SetOpenRuntime(const CalculatorContext& calculator_context,
                       int64 start_time_usec, int64 end_time_usec)
-      LOCKS_EXCLUDED(profiler_mutex_);
+      ABSL_LOCKS_EXCLUDED(profiler_mutex_);
   void SetCloseRuntime(const CalculatorContext& calculator_context,
                        int64 start_time_usec, int64 end_time_usec)
-      LOCKS_EXCLUDED(profiler_mutex_);
+      ABSL_LOCKS_EXCLUDED(profiler_mutex_);
 
   // Updates the input streams profiles for the calculator and returns the
   // minimum |source_process_start_usec| of all input packets, excluding empty
@@ -289,7 +289,7 @@ class GraphProfiler : public std::enable_shared_from_this<ProfilingContext> {
   // Requires ReaderLock for is_profiling_.
   void AddProcessSample(const CalculatorContext& calculator_context,
                         int64 start_time_usec, int64 end_time_usec)
-      LOCKS_EXCLUDED(profiler_mutex_);
+      ABSL_LOCKS_EXCLUDED(profiler_mutex_);
 
   // Helper method to get trace_log_path.  If the trace_log_path is empty and
   // tracing is enabled, this function returns a default platform dependent

mediapipe/framework/profiler/graph_tracer_test.cc

@@ -1284,5 +1284,33 @@ TEST_F(GraphTracerE2ETest, GpuTracing) {
   EXPECT_NE(nullptr, graph_.profiler()->CreateGlProfilingHelper());
 }
 
+// This test shows that ~CalculatorGraph() can complete successfully, even when
+// the periodic profiler output is enabled.  If periodic profiler output is not
+// stopped in ~CalculatorGraph(), it will deadlock at ~Executor().
+TEST_F(GraphTracerE2ETest, DestructGraph) {
+  std::string log_path = absl::StrCat(getenv("TEST_TMPDIR"), "/log_file_");
+  SetUpPassThroughGraph();
+  graph_config_.mutable_profiler_config()->set_trace_enabled(true);
+  graph_config_.mutable_profiler_config()->set_trace_log_path(log_path);
+  graph_config_.set_num_threads(4);
+
+  // Callbacks to control the LambdaCalculator.
+  ProcessFunction wait_0 = [&](const InputStreamShardSet& inputs,
+                               OutputStreamShardSet* outputs) {
+    return PassThrough(inputs, outputs);
+  };
+
+  {
+    CalculatorGraph graph;
+    // Start the graph with the callback.
+    MP_ASSERT_OK(graph.Initialize(graph_config_,
+                                  {
+                                      {"callback_0", Adopt(new auto(wait_0))},
+                                  }));
+    MP_ASSERT_OK(graph.StartRun({}));
+    // Destroy the graph immediately.
+  }
+}
+
 }  // namespace
 }  // namespace mediapipe

mediapipe/framework/profiler/sharded_map.h

@@ -47,7 +47,7 @@ class ShardedMap {
       : ShardedMap(capacity, capacity / 10 + 1) {}
 
   // Returns the iterator to the entry for a key.
-  inline iterator find(const Key& key) NO_THREAD_SAFETY_ANALYSIS {
+  inline iterator find(const Key& key) ABSL_NO_THREAD_SAFETY_ANALYSIS {
     size_t shard = Index(key);
     mutexes_[shard].Lock();
     typename Map::iterator iter = maps_[shard].find(key);
@@ -67,7 +67,7 @@ class ShardedMap {
 
   // Adds an entry to the map and returns the iterator to it.
   inline std::pair<iterator, bool> insert(const value_type& val)
-      NO_THREAD_SAFETY_ANALYSIS {
+      ABSL_NO_THREAD_SAFETY_ANALYSIS {
     size_t shard = Index(val.first);
     mutexes_[shard].Lock();
     std::pair<typename Map::iterator, bool> p = maps_[shard].insert(val);
@@ -91,7 +91,7 @@ class ShardedMap {
   inline size_t size() const { return size_; }
 
   // Returns the iterator to the first element.
-  inline iterator begin() NO_THREAD_SAFETY_ANALYSIS {
+  inline iterator begin() ABSL_NO_THREAD_SAFETY_ANALYSIS {
     mutexes_[0].Lock();
     iterator result{0, maps_[0].begin(), this};
     result.NextEntryShard();
@@ -153,14 +153,14 @@ class ShardedMap {
     Iterator(size_t shard, map_iterator iter, ShardedMapPtr map)
         : shard_(shard), iter_(iter), map_(map) {}
     // Releases all resources.
-    inline void Clear() NO_THREAD_SAFETY_ANALYSIS {
+    inline void Clear() ABSL_NO_THREAD_SAFETY_ANALYSIS {
       if (map_ && iter_ != map_->maps_.back().end()) {
         map_->mutexes_[shard_].Unlock();
       }
       map_ = nullptr;
     }
     // Moves to the shard of the next entry.
-    void NextEntryShard() NO_THREAD_SAFETY_ANALYSIS {
+    void NextEntryShard() ABSL_NO_THREAD_SAFETY_ANALYSIS {
       size_t last = map_->maps_.size() - 1;
       while (iter_ == map_->maps_[shard_].end() && shard_ < last) {
         map_->mutexes_[shard_].Unlock();

mediapipe/framework/scheduler.cc

@@ -238,7 +238,7 @@ void Scheduler::WaitUntilGraphInputStreamUnthrottled(
   }
   secondary_mutex->Unlock();
   ApplicationThreadAwait(
-      [this, seq_num]() EXCLUSIVE_LOCKS_REQUIRED(state_mutex_) {
+      [this, seq_num]() ABSL_EXCLUSIVE_LOCKS_REQUIRED(state_mutex_) {
         return (unthrottle_seq_num_ != seq_num) || state_ == STATE_TERMINATED;
       });
   secondary_mutex->Lock();
@@ -255,7 +255,7 @@ void Scheduler::EmittedObservedOutput() {
 ::mediapipe::Status Scheduler::WaitForObservedOutput() {
   bool observed = false;
   ApplicationThreadAwait(
-      [this, &observed]() EXCLUSIVE_LOCKS_REQUIRED(state_mutex_) {
+      [this, &observed]() ABSL_EXCLUSIVE_LOCKS_REQUIRED(state_mutex_) {
         observed = observed_output_signal_;
         observed_output_signal_ = false;
         waiting_for_observed_output_ = !observed && state_ != STATE_TERMINATED;
@@ -281,7 +281,7 @@ void Scheduler::EmittedObservedOutput() {
 
 ::mediapipe::Status Scheduler::WaitUntilDone() {
   RET_CHECK_NE(state_, STATE_NOT_STARTED);
-  ApplicationThreadAwait([this]() EXCLUSIVE_LOCKS_REQUIRED(state_mutex_) {
+  ApplicationThreadAwait([this]() ABSL_EXCLUSIVE_LOCKS_REQUIRED(state_mutex_) {
     return state_ == STATE_TERMINATED;
   });
   return ::mediapipe::OkStatus();

mediapipe/framework/scheduler.h

@@ -70,13 +70,13 @@ class Scheduler {
   // have been closed, and no more calculators can be run).
   // This function can be called only after Start().
   // Runs application thread tasks while waiting.
-  ::mediapipe::Status WaitUntilDone() LOCKS_EXCLUDED(state_mutex_);
+  ::mediapipe::Status WaitUntilDone() ABSL_LOCKS_EXCLUDED(state_mutex_);
 
   // Wait until the running graph is in the idle mode, which is when nothing can
   // be scheduled and nothing is running in the worker threads.  This function
   // can be called only after Start().
   // Runs application thread tasks while waiting.
-  ::mediapipe::Status WaitUntilIdle() LOCKS_EXCLUDED(state_mutex_);
+  ::mediapipe::Status WaitUntilIdle() ABSL_LOCKS_EXCLUDED(state_mutex_);
 
   // Wait until any graph input stream has been unthrottled.
   // This is meant to be used by CalculatorGraph::AddPacketToInputStream, which
@@ -86,14 +86,15 @@ class Scheduler {
   // This function can be called by multiple threads concurrently.
   // Runs application thread tasks while waiting.
   void WaitUntilGraphInputStreamUnthrottled(absl::Mutex* secondary_mutex)
-      LOCKS_EXCLUDED(state_mutex_) EXCLUSIVE_LOCKS_REQUIRED(secondary_mutex);
+      ABSL_LOCKS_EXCLUDED(state_mutex_)
+          ABSL_EXCLUSIVE_LOCKS_REQUIRED(secondary_mutex);
 
   // Wait until any observed output emits a packet. Like a semaphore,
   // this function returns immediately if an observed packet has already been
   // emitted since the previous call. This relies on the fact that the calls are
   // in sequence. Runs application thread tasks while waiting.
   // Returns ::mediapipe::OutOfRangeError if the graph terminated.
-  ::mediapipe::Status WaitForObservedOutput() LOCKS_EXCLUDED(state_mutex_);
+  ::mediapipe::Status WaitForObservedOutput() ABSL_LOCKS_EXCLUDED(state_mutex_);
 
   // Callback that is invoked by a node when it wants to be scheduled.
   // If the node is throttled, the call is ignored.
@@ -118,27 +119,28 @@ class Scheduler {
   void AddUnopenedSourceNode(CalculatorNode* node);
 
   // Adds |node| to |sources_queue_|.
-  void AddNodeToSourcesQueue(CalculatorNode* node) LOCKS_EXCLUDED(state_mutex_);
+  void AddNodeToSourcesQueue(CalculatorNode* node)
+      ABSL_LOCKS_EXCLUDED(state_mutex_);
 
   // Assigns node to a scheduler queue.
   void AssignNodeToSchedulerQueue(CalculatorNode* node);
 
   // Pauses the scheduler.  Does nothing if Cancel has been called.
-  void Pause() LOCKS_EXCLUDED(state_mutex_);
+  void Pause() ABSL_LOCKS_EXCLUDED(state_mutex_);
 
   // Resumes the scheduler.
-  void Resume() LOCKS_EXCLUDED(state_mutex_);
+  void Resume() ABSL_LOCKS_EXCLUDED(state_mutex_);
 
   // Aborts the scheduler if the graph is started but is not terminated; no-op
   // otherwise.  For the graph to properly be cancelled, graph_->HasError()
   // must also return true.
-  void Cancel() LOCKS_EXCLUDED(state_mutex_);
+  void Cancel() ABSL_LOCKS_EXCLUDED(state_mutex_);
 
   // Returns true if scheduler is paused.
-  bool IsPaused() LOCKS_EXCLUDED(state_mutex_);
+  bool IsPaused() ABSL_LOCKS_EXCLUDED(state_mutex_);
 
   // Returns true if scheduler is terminated.
-  bool IsTerminated() LOCKS_EXCLUDED(state_mutex_);
+  bool IsTerminated() ABSL_LOCKS_EXCLUDED(state_mutex_);
 
   // Cleanup any remaining state after the run.
   void CleanupAfterRun();
@@ -148,11 +150,11 @@ class Scheduler {
   // Notifies the scheduler that a packet was added to a graph input stream.
   // The scheduler needs to check whether it is still deadlocked, and
   // unthrottle again if so.
-  void AddedPacketToGraphInputStream() LOCKS_EXCLUDED(state_mutex_);
+  void AddedPacketToGraphInputStream() ABSL_LOCKS_EXCLUDED(state_mutex_);
 
-  void ThrottledGraphInputStream() LOCKS_EXCLUDED(state_mutex_);
+  void ThrottledGraphInputStream() ABSL_LOCKS_EXCLUDED(state_mutex_);
-  void UnthrottledGraphInputStream() LOCKS_EXCLUDED(state_mutex_);
+  void UnthrottledGraphInputStream() ABSL_LOCKS_EXCLUDED(state_mutex_);
-  void EmittedObservedOutput() LOCKS_EXCLUDED(state_mutex_);
+  void EmittedObservedOutput() ABSL_LOCKS_EXCLUDED(state_mutex_);
 
   // Closes all source nodes at the next scheduling opportunity.
   void CloseAllSourceNodes();
@@ -212,7 +214,7 @@ class Scheduler {
 
   // Returns true if nothing can be scheduled and no tasks are running or
   // scheduled to run on the Executor.
-  bool IsIdle() EXCLUSIVE_LOCKS_REQUIRED(state_mutex_);
+  bool IsIdle() ABSL_EXCLUSIVE_LOCKS_REQUIRED(state_mutex_);
 
   // Clean up active_sources_ by removing closed sources. If all the active
   // sources are closed, this will leave active_sources_ empty. If not, some
@@ -222,7 +224,8 @@ class Scheduler {
   // Adds the next layer of sources to the scheduler queue if the previous layer
   // has finished running.
   // Returns true if it scheduled any sources.
-  bool TryToScheduleNextSourceLayer() EXCLUSIVE_LOCKS_REQUIRED(state_mutex_);
+  bool TryToScheduleNextSourceLayer()
+      ABSL_EXCLUSIVE_LOCKS_REQUIRED(state_mutex_);
 
   // Takes care of three different operations, as needed:
   // - activating sources;
@@ -230,10 +233,10 @@ class Scheduler {
   // - terminating the scheduler.
   // Thread-safe and reentrant.
   // TODO: analyze call sites, split it up further.
-  void HandleIdle() EXCLUSIVE_LOCKS_REQUIRED(state_mutex_);
+  void HandleIdle() ABSL_EXCLUSIVE_LOCKS_REQUIRED(state_mutex_);
 
   // Terminates the scheduler. Should only be called by HandleIdle.
-  void Quit() EXCLUSIVE_LOCKS_REQUIRED(state_mutex_);
+  void Quit() ABSL_EXCLUSIVE_LOCKS_REQUIRED(state_mutex_);
 
   // Helper for the various Wait methods. Waits for the given condition,
   // running application thread tasks in the meantime.
@@ -257,7 +260,7 @@ class Scheduler {
   // Priority queue of source nodes ordered by layer and then source process
   // order. This stores the set of sources that are yet to be run.
   std::priority_queue<SchedulerQueue::Item> sources_queue_
-      GUARDED_BY(state_mutex_);
+      ABSL_GUARDED_BY(state_mutex_);
 
   // Source nodes with the smallest source layer are at the beginning of
   // unopened_sources_. Before the scheduler is started, all source nodes are
@@ -276,7 +279,7 @@ class Scheduler {
   // These correspond to the Wait* methods in this class.
   // Not all state changes need to signal this, only those that enter one of
   // the waitable states.
-  absl::CondVar state_cond_var_ GUARDED_BY(state_mutex_);
+  absl::CondVar state_cond_var_ ABSL_GUARDED_BY(state_mutex_);
 
   // Number of queues which are not idle.
   // Note: this indicates two slightly different things:
@@ -288,17 +291,18 @@ class Scheduler {
   // This is ok, because it happens within a single critical section, which is
   // guarded by state_mutex_. If we wanted to split this critical section, we
   // would have to separate a and b into two variables.
-  int non_idle_queue_count_ GUARDED_BY(state_mutex_) = 0;
+  int non_idle_queue_count_ ABSL_GUARDED_BY(state_mutex_) = 0;
 
   // Tasks to be executed on the application thread.
-  std::deque<std::function<void()>> app_thread_tasks_ GUARDED_BY(state_mutex_);
+  std::deque<std::function<void()>> app_thread_tasks_
+      ABSL_GUARDED_BY(state_mutex_);
 
   // Used by HandleIdle to avoid multiple concurrent executions.
   // We cannot simply hold a mutex throughout it, for two reasons:
   // - We need it to be reentrant, which Mutex does not support.
   // - We want simultaneous calls to return immediately instead of waiting,
   //   and Mutex's TryLock is not guaranteed to work.
-  bool handling_idle_ GUARDED_BY(state_mutex_) = false;
+  bool handling_idle_ ABSL_GUARDED_BY(state_mutex_) = false;
 
   // Mutex for the scheduler state and related things.
   // Note: state_ is declared as atomic so that its getter methods don't need
@@ -309,19 +313,19 @@ class Scheduler {
   std::atomic<State> state_ = ATOMIC_VAR_INIT(STATE_NOT_STARTED);
 
   // True if all graph input streams are closed.
-  bool graph_input_streams_closed_ GUARDED_BY(state_mutex_) = false;
+  bool graph_input_streams_closed_ ABSL_GUARDED_BY(state_mutex_) = false;
 
   // Number of throttled graph input streams.
-  int throttled_graph_input_stream_count_ GUARDED_BY(state_mutex_) = 0;
+  int throttled_graph_input_stream_count_ ABSL_GUARDED_BY(state_mutex_) = 0;
 
   // Used to stop WaitUntilGraphInputStreamUnthrottled.
-  int unthrottle_seq_num_ GUARDED_BY(state_mutex_) = 0;
+  int unthrottle_seq_num_ ABSL_GUARDED_BY(state_mutex_) = 0;
 
   // Used to stop WaitForObservedOutput.
-  bool observed_output_signal_ GUARDED_BY(state_mutex_) = false;
+  bool observed_output_signal_ ABSL_GUARDED_BY(state_mutex_) = false;
 
   // True if an application thread is waiting in WaitForObservedOutput.
-  bool waiting_for_observed_output_ GUARDED_BY(state_mutex_) = false;
+  bool waiting_for_observed_output_ ABSL_GUARDED_BY(state_mutex_) = false;
 };
 
 }  // namespace internal

mediapipe/framework/scheduler_queue.h

@@ -105,45 +105,45 @@ class SchedulerQueue : public TaskQueue {
   // NOTE: After calling SetRunning(true), the caller must call
   // SubmitWaitingTasksToExecutor since tasks may have been added while the
   // queue was not running.
-  void SetRunning(bool running) LOCKS_EXCLUDED(mutex_);
+  void SetRunning(bool running) ABSL_LOCKS_EXCLUDED(mutex_);
 
   // Gets the number of tasks that need to be submitted to the executor, and
   // updates num_pending_tasks_. If this method is called and returns a
   // non-zero value, the executor's AddTask method *must* be called for each
   // task returned, but it can be called without holding the lock.
-  int GetTasksToSubmitToExecutor() EXCLUSIVE_LOCKS_REQUIRED(mutex_);
+  int GetTasksToSubmitToExecutor() ABSL_EXCLUSIVE_LOCKS_REQUIRED(mutex_);
 
   // Submits tasks that are waiting (e.g. that were added while the queue was
   // not running) if the queue is running. The caller must not hold any mutex.
-  void SubmitWaitingTasksToExecutor() LOCKS_EXCLUDED(mutex_);
+  void SubmitWaitingTasksToExecutor() ABSL_LOCKS_EXCLUDED(mutex_);
 
   // Adds a node and a calculator context to the scheduler queue if the node is
   // not already running. Note that if the node was running, then it will be
   // rescheduled upon completion (after checking dependencies), so this call is
   // not lost.
   void AddNode(CalculatorNode* node, CalculatorContext* cc)
-      LOCKS_EXCLUDED(mutex_);
+      ABSL_LOCKS_EXCLUDED(mutex_);
 
   // Adds a node to the scheduler queue for an OpenNode() call.
-  void AddNodeForOpen(CalculatorNode* node) LOCKS_EXCLUDED(mutex_);
+  void AddNodeForOpen(CalculatorNode* node) ABSL_LOCKS_EXCLUDED(mutex_);
 
   // Adds an Item to queue_.
   void AddItemToQueue(Item&& item);
 
-  void CleanupAfterRun() LOCKS_EXCLUDED(mutex_);
+  void CleanupAfterRun() ABSL_LOCKS_EXCLUDED(mutex_);
 
  private:
   // Used internally by RunNextTask. Invokes ProcessNode or CloseNode, followed
   // by EndScheduling.
   void RunCalculatorNode(CalculatorNode* node, CalculatorContext* cc)
-      LOCKS_EXCLUDED(mutex_);
+      ABSL_LOCKS_EXCLUDED(mutex_);
 
   // Used internally by RunNextTask. Invokes OpenNode, followed by
   // CheckIfBecameReady.
-  void OpenCalculatorNode(CalculatorNode* node) LOCKS_EXCLUDED(mutex_);
+  void OpenCalculatorNode(CalculatorNode* node) ABSL_LOCKS_EXCLUDED(mutex_);
 
   // Checks whether the queue has no queued nodes or pending tasks.
-  bool IsIdle() EXCLUSIVE_LOCKS_REQUIRED(mutex_);
+  bool IsIdle() ABSL_EXCLUSIVE_LOCKS_REQUIRED(mutex_);
 
   Executor* executor_ = nullptr;
 
@@ -154,16 +154,16 @@ class SchedulerQueue : public TaskQueue {
   // decrements it. The queue is running if running_count_ > 0. A running
   // queue will submit tasks to the executor.
   // Invariant: running_count_ <= 1.
-  int running_count_ GUARDED_BY(mutex_) = 0;
+  int running_count_ ABSL_GUARDED_BY(mutex_) = 0;
 
   // Number of tasks added to the Executor and not yet complete.
-  int num_pending_tasks_ GUARDED_BY(mutex_);
+  int num_pending_tasks_ ABSL_GUARDED_BY(mutex_);
 
   // Number of tasks that need to be added to the Executor.
-  int num_tasks_to_add_ GUARDED_BY(mutex_);
+  int num_tasks_to_add_ ABSL_GUARDED_BY(mutex_);
 
   // Queue of nodes that need to be run.
-  std::priority_queue<Item> queue_ GUARDED_BY(mutex_);
+  std::priority_queue<Item> queue_ ABSL_GUARDED_BY(mutex_);
 
   SchedulerShared* const shared_;
 

mediapipe/framework/stream_handler/fixed_size_input_stream_handler.cc

@@ -67,7 +67,7 @@ class FixedSizeInputStreamHandler : public DefaultInputStreamHandler {
 
  private:
   // Drops packets if all input streams exceed trigger_queue_size.
-  void EraseAllSurplus() EXCLUSIVE_LOCKS_REQUIRED(erase_mutex_) {
+  void EraseAllSurplus() ABSL_EXCLUSIVE_LOCKS_REQUIRED(erase_mutex_) {
     Timestamp min_timestamp_all_streams = Timestamp::Max();
     for (const auto& stream : input_stream_managers_) {
       // Check whether every InputStreamImpl grew beyond trigger_queue_size.
@@ -127,7 +127,8 @@ class FixedSizeInputStreamHandler : public DefaultInputStreamHandler {
   // Keeps only the most recent target_queue_size packets in each stream
   // exceeding trigger_queue_size.  Also, discards all packets older than the
   // first kept timestamp on any stream.
-  void EraseAnySurplus(bool keep_one) EXCLUSIVE_LOCKS_REQUIRED(erase_mutex_) {
+  void EraseAnySurplus(bool keep_one)
+      ABSL_EXCLUSIVE_LOCKS_REQUIRED(erase_mutex_) {
     // Record the most recent first kept timestamp on any stream.
     for (const auto& stream : input_stream_managers_) {
       int32 queue_size = (stream->QueueSize() >= trigger_queue_size_)
@@ -151,7 +152,7 @@ class FixedSizeInputStreamHandler : public DefaultInputStreamHandler {
   }
 
   void EraseSurplusPackets(bool keep_one)
-      EXCLUSIVE_LOCKS_REQUIRED(erase_mutex_) {
+      ABSL_EXCLUSIVE_LOCKS_REQUIRED(erase_mutex_) {
     return (fixed_min_size_) ? EraseAllSurplus() : EraseAnySurplus(keep_one);
   }
 
@@ -218,9 +219,9 @@ class FixedSizeInputStreamHandler : public DefaultInputStreamHandler {
   bool fixed_min_size_;
   // Indicates that GetNodeReadiness has returned kReadyForProcess once, and
   // the corresponding call to FillInputSet has not yet completed.
-  bool pending_ GUARDED_BY(erase_mutex_);
+  bool pending_ ABSL_GUARDED_BY(erase_mutex_);
   // The timestamp used to truncate all input streams.
-  Timestamp kept_timestamp_ GUARDED_BY(erase_mutex_);
+  Timestamp kept_timestamp_ ABSL_GUARDED_BY(erase_mutex_);
   absl::Mutex erase_mutex_;
 };
 

mediapipe/framework/stream_handler/fixed_size_input_stream_handler_test.cc

@@ -35,13 +35,13 @@ const int64 kSlowCalculatorRate = 10;
 
 // Rate limiter for TestSlowCalculator.
 ABSL_CONST_INIT absl::Mutex g_source_mutex(absl::kConstInit);
-int64 g_source_counter GUARDED_BY(g_source_mutex);
+int64 g_source_counter ABSL_GUARDED_BY(g_source_mutex);
 
 // Rate limiter for TestSourceCalculator.
-int64 g_slow_counter GUARDED_BY(g_source_mutex);
+int64 g_slow_counter ABSL_GUARDED_BY(g_source_mutex);
 
 // Flag that indicates that the source is done.
-bool g_source_done GUARDED_BY(g_source_mutex);
+bool g_source_done ABSL_GUARDED_BY(g_source_mutex);
 
 class TestSourceCalculator : public CalculatorBase {
  public:
@@ -74,7 +74,7 @@ class TestSourceCalculator : public CalculatorBase {
   }
 
  private:
-  bool CanProceed() const EXCLUSIVE_LOCKS_REQUIRED(g_source_mutex) {
+  bool CanProceed() const ABSL_EXCLUSIVE_LOCKS_REQUIRED(g_source_mutex) {
     return g_source_counter <= kSlowCalculatorRate * g_slow_counter ||
            g_source_counter <= 1;
   }
@@ -109,7 +109,7 @@ class TestSlowCalculator : public CalculatorBase {
   }
 
  private:
-  bool CanProceed() const EXCLUSIVE_LOCKS_REQUIRED(g_source_mutex) {
+  bool CanProceed() const ABSL_EXCLUSIVE_LOCKS_REQUIRED(g_source_mutex) {
     return g_source_counter > kSlowCalculatorRate * g_slow_counter ||
            g_source_done;
   }

mediapipe/framework/stream_handler/in_order_output_stream_handler.h

@@ -40,15 +40,15 @@ class InOrderOutputStreamHandler : public OutputStreamHandler {
                             options, calculator_run_in_parallel) {}
 
  private:
-  void PropagationLoop() EXCLUSIVE_LOCKS_REQUIRED(timestamp_mutex_) final;
+  void PropagationLoop() ABSL_EXCLUSIVE_LOCKS_REQUIRED(timestamp_mutex_) final;
 
   void PropagatePackets(CalculatorContext** calculator_context,
                         Timestamp* context_timestamp)
-      EXCLUSIVE_LOCKS_REQUIRED(timestamp_mutex_);
+      ABSL_EXCLUSIVE_LOCKS_REQUIRED(timestamp_mutex_);
 
   void PropagationBound(CalculatorContext** calculator_context,
                         Timestamp* context_timestamp)
-      EXCLUSIVE_LOCKS_REQUIRED(timestamp_mutex_);
+      ABSL_EXCLUSIVE_LOCKS_REQUIRED(timestamp_mutex_);
 };
 }  // namespace mediapipe
 

mediapipe/framework/stream_handler/sync_set_input_stream_handler.cc

@@ -64,18 +64,18 @@ class SyncSetInputStreamHandler : public InputStreamHandler {
   // Populates timestamp bounds for streams outside the ready sync-set.
   void FillInputBounds(Timestamp input_timestamp,
                        InputStreamShardSet* input_set)
-      EXCLUSIVE_LOCKS_REQUIRED(mutex_);
+      ABSL_EXCLUSIVE_LOCKS_REQUIRED(mutex_);
 
  private:
   absl::Mutex mutex_;
   // The ids of each set of inputs.
-  std::vector<std::vector<CollectionItemId>> sync_sets_ GUARDED_BY(mutex_);
+  std::vector<std::vector<CollectionItemId>> sync_sets_ ABSL_GUARDED_BY(mutex_);
   // The index of the ready sync set.  A value of -1 indicates that no
   // sync sets are ready.
-  int ready_sync_set_index_ GUARDED_BY(mutex_) = -1;
+  int ready_sync_set_index_ ABSL_GUARDED_BY(mutex_) = -1;
   // The timestamp at which the sync set is ready.  If no sync set is
   // ready then this variable should be Timestamp::Done() .
-  Timestamp ready_timestamp_ GUARDED_BY(mutex_);
+  Timestamp ready_timestamp_ ABSL_GUARDED_BY(mutex_);
 };
 
 REGISTER_INPUT_STREAM_HANDLER(SyncSetInputStreamHandler);

mediapipe/framework/stream_handler/timestamp_align_input_stream_handler.cc

@@ -79,7 +79,7 @@ class TimestampAlignInputStreamHandler : public InputStreamHandler {
   CollectionItemId timestamp_base_stream_id_;
 
   absl::Mutex mutex_;
-  bool offsets_initialized_ GUARDED_BY(mutex_) = false;
+  bool offsets_initialized_ ABSL_GUARDED_BY(mutex_) = false;
   std::vector<TimestampDiff> timestamp_offsets_;
 };
 REGISTER_INPUT_STREAM_HANDLER(TimestampAlignInputStreamHandler);

mediapipe/framework/tool/BUILD

@@ -244,6 +244,7 @@ cc_library(
     hdrs = ["subgraph_expansion.h"],
     visibility = ["//visibility:public"],
     deps = [
+        ":name_util",
         ":tag_map",
         "//mediapipe/framework:calculator_cc_proto",
         "//mediapipe/framework:packet_generator",

mediapipe/framework/tool/name_util.cc

@@ -68,5 +68,30 @@ std::string GetUnusedSidePacketName(
   return candidate;
 }
 
+std::string CanonicalNodeName(const CalculatorGraphConfig& graph_config,
+                              int node_id) {
+  const auto& node_config = graph_config.node(node_id);
+  std::string node_name = node_config.name().empty() ? node_config.calculator()
+                                                     : node_config.name();
+  int count = 0;
+  int sequence = 0;
+  for (int i = 0; i < graph_config.node_size(); i++) {
+    const auto& current_node_config = graph_config.node(i);
+    std::string current_node_name = current_node_config.name().empty()
+                                        ? current_node_config.calculator()
+                                        : current_node_config.name();
+    if (node_name == current_node_name) {
+      ++count;
+      if (i < node_id) {
+        ++sequence;
+      }
+    }
+  }
+  if (count <= 1) {
+    return node_name;
+  }
+  return absl::StrCat(node_name, "_", sequence + 1);
+}
+
 }  // namespace tool
 }  // namespace mediapipe

mediapipe/framework/tool/name_util.h

@@ -31,7 +31,53 @@ std::string GetUnusedSidePacketName(const CalculatorGraphConfig& /*config*/,
 std::string GetUnusedNodeName(const CalculatorGraphConfig& config,
                               const std::string& node_name_base);
 
+// Returns a short unique name for a Node in a CalculatorGraphConfig.
+// This is the Node.name (if specified) or the Node.calculator.
+// If there are multiple calculators with similar name in the graph, the name
+// will be postfixed by "_<COUNT>". For example, in the following graph the node
+// names will be as mentiond.
+//
+// node { // Name will be "CalcA"
+//   calculator: "CalcA"
+// }
+// node { // Name will be "NameB"
+//   calculator: "CalcB"
+//   name: "NameB"
+// }
+// node { // Name will be "CalcC_1" due to duplicate "calculator" field.
+//   calculator: "CalcC"
+// }
+// node { // Name will be "CalcC_2" due to duplicate "calculator" field.
+//   calculator: "CalcC"
+// }
+// node { // Name will be "NameX".
+//   calculator: "CalcD"
+//   name: "NameX"
+// }
+// node { // Name will be "NameY".
+//   calculator: "CalcD"
+//   name: "NameY"
+// }
+// node { // Name will be "NameZ_1". due to "name" field duplicate.
+//   calculator: "CalcE"
+//   name: "NameZ"
+// }
+// node { // Name will be "NameZ_2". due to "name" field duplicate.
+//   calculator: "CalcF"
+//   name: "NameZ"
+// }
+//
+// TODO: Update GraphNode.UniqueName in MediaPipe Visualizer to match
+// this logic.
+// TODO: Fix the edge case mentioned in the bug.
+std::string CanonicalNodeName(const CalculatorGraphConfig& graph_config,
+                              int node_id);
+
 }  // namespace tool
 }  // namespace mediapipe
 
+namespace mediapipe {
+using ::mediapipe::tool::CanonicalNodeName;
+}  // namespace mediapipe
+
 #endif  // MEDIAPIPE_FRAMEWORK_TOOL_NAME_UTIL_H_

mediapipe/framework/tool/simulation_clock.cc

@@ -15,10 +15,16 @@
 #include "mediapipe/framework/tool/simulation_clock.h"
 
 #include "absl/synchronization/mutex.h"
+#include "absl/time/time.h"
 #include "mediapipe/framework/port/logging.h"
 
 namespace mediapipe {
 
+SimulationClock::~SimulationClock() {
+  ThreadStart();
+  ThreadFinish();
+}
+
 absl::Time SimulationClock::TimeNow() {
   absl::MutexLock l(&time_mutex_);
   return time_;

mediapipe/framework/tool/simulation_clock.h

@@ -39,7 +39,7 @@ namespace mediapipe {
 class SimulationClock : public mediapipe::Clock {
  public:
   SimulationClock() {}
-  ~SimulationClock() override {}
+  ~SimulationClock() override;
 
   // Returns the simulated time.
   absl::Time TimeNow() override;
@@ -59,9 +59,9 @@ class SimulationClock : public mediapipe::Clock {
  protected:
   // Queue up wake up waiter.
   void SleepInternal(absl::Time wakeup_time)
-      EXCLUSIVE_LOCKS_REQUIRED(time_mutex_);
+      ABSL_EXCLUSIVE_LOCKS_REQUIRED(time_mutex_);
   // Advances to the next wake up time if no related threads are running.
-  void TryAdvanceTime() EXCLUSIVE_LOCKS_REQUIRED(time_mutex_);
+  void TryAdvanceTime() ABSL_EXCLUSIVE_LOCKS_REQUIRED(time_mutex_);
 
   // Represents a thread blocked in SleepUntil.
   struct Waiter {
@@ -71,9 +71,9 @@ class SimulationClock : public mediapipe::Clock {
 
  protected:
   absl::Mutex time_mutex_;
-  absl::Time time_ GUARDED_BY(time_mutex_);
+  absl::Time time_ ABSL_GUARDED_BY(time_mutex_);
-  std::multimap<absl::Time, Waiter*> waiters_ GUARDED_BY(time_mutex_);
+  std::multimap<absl::Time, Waiter*> waiters_ ABSL_GUARDED_BY(time_mutex_);
-  int num_running_ GUARDED_BY(time_mutex_) = 0;
+  int num_running_ ABSL_GUARDED_BY(time_mutex_) = 0;
 };
 
 }  // namespace mediapipe

mediapipe/framework/tool/simulation_clock_test.cc

@@ -242,5 +242,59 @@ TEST_F(SimulationClockTest, InFlight) {
               ElementsAre(10000, 20000, 40000, 60000, 70000, 100000));
 }
 
+// Shows successful destruction of CalculatorGraph, SimulationClockExecutor,
+// and SimulationClock.  With tsan, this test reveals a race condition unless
+// the SimulationClock destructor calls ThreadFinish to waits for all threads.
+TEST_F(SimulationClockTest, DestroyClock) {
+  auto graph_config = ParseTextProtoOrDie<CalculatorGraphConfig>(R"(
+    node {
+      calculator: "LambdaCalculator"
+      input_side_packet: 'callback_0'
+      output_stream: "input_1"
+    }
+    node {
+      calculator: "LambdaCalculator"
+      input_side_packet: 'callback_1'
+      input_stream: "input_1"
+      output_stream: "output_1"
+    }
+  )");
+
+  int input_count = 0;
+  ProcessFunction wait_0 = [&](const InputStreamShardSet& inputs,
+                               OutputStreamShardSet* outputs) {
+    clock_->Sleep(absl::Microseconds(20000));
+    if (++input_count < 4) {
+      outputs->Index(0).AddPacket(
+          MakePacket<uint64>(input_count).At(Timestamp(input_count)));
+      return ::mediapipe::OkStatus();
+    } else {
+      return tool::StatusStop();
+    }
+  };
+  ProcessFunction wait_1 = [&](const InputStreamShardSet& inputs,
+                               OutputStreamShardSet* outputs) {
+    clock_->Sleep(absl::Microseconds(30000));
+    return PassThrough(inputs, outputs);
+  };
+
+  std::vector<Packet> out_packets;
+  ::mediapipe::Status status;
+  {
+    CalculatorGraph graph;
+    auto executor = std::make_shared<SimulationClockExecutor>(4);
+    clock_ = executor->GetClock().get();
+    MP_ASSERT_OK(graph.SetExecutor("", executor));
+    tool::AddVectorSink("output_1", &graph_config, &out_packets);
+    MP_ASSERT_OK(graph.Initialize(graph_config,
+                                  {
+                                      {"callback_0", Adopt(new auto(wait_0))},
+                                      {"callback_1", Adopt(new auto(wait_1))},
+                                  }));
+    MP_EXPECT_OK(graph.Run());
+  }
+  EXPECT_EQ(out_packets.size(), 3);
+}
+
 }  // namespace
 }  // namespace mediapipe

mediapipe/framework/tool/subgraph_expansion.cc

@@ -35,6 +35,7 @@
 #include "mediapipe/framework/port/status_macros.h"
 #include "mediapipe/framework/status_handler.pb.h"
 #include "mediapipe/framework/subgraph.h"
+#include "mediapipe/framework/tool/name_util.h"
 #include "mediapipe/framework/tool/tag_map.h"
 
 namespace mediapipe {
@@ -95,6 +96,13 @@ namespace tool {
         config->mutable_output_side_packet()}) {
     MP_RETURN_IF_ERROR(TransformStreamNames(streams, transform));
   }
+  std::vector<std::string> node_names(config->node_size());
+  for (int node_id = 0; node_id < config->node_size(); ++node_id) {
+    node_names[node_id] = CanonicalNodeName(*config, node_id);
+  }
+  for (int node_id = 0; node_id < config->node_size(); ++node_id) {
+    config->mutable_node(node_id)->set_name(transform(node_names[node_id]));
+  }
   for (auto& node : *config->mutable_node()) {
     for (auto* streams :
          {node.mutable_input_stream(), node.mutable_output_stream(),
@@ -102,9 +110,6 @@ namespace tool {
           node.mutable_output_side_packet()}) {
       MP_RETURN_IF_ERROR(TransformStreamNames(streams, transform));
     }
-    if (!node.name().empty()) {
-      node.set_name(transform(node.name()));
-    }
   }
   for (auto& generator : *config->mutable_packet_generator()) {
     for (auto* streams : {generator.mutable_input_side_packet(),
@@ -120,21 +125,18 @@ namespace tool {
 }
 
 // Adds a prefix to the name of each stream, side packet and node in the
-// config. Each call to this method should use a different subgraph_index
+// config. Each call to this method should use a different prefix. For example:
-// to produce a different numerical prefix. For example:
+//   1, { foo, bar }  --PrefixNames-> { qsg__foo, qsg__bar }
-//   1, { foo, bar }  --PrefixNames-> { __sg_1_foo, __sg_1_bar }
+//   2, { foo, bar }  --PrefixNames-> { rsg__foo, rsg__bar }
-//   2, { foo, bar }  --PrefixNames-> { __sg_2_foo, __sg_2_bar }
 // This means that two copies of the same subgraph will not interfere with
 // each other.
-static ::mediapipe::Status PrefixNames(int subgraph_index,
+static ::mediapipe::Status PrefixNames(std::string prefix,
                                        CalculatorGraphConfig* config) {
-  // TODO: prefix with subgraph name instead (see cl/157677233
+  std::transform(prefix.begin(), prefix.end(), prefix.begin(), ::tolower);
-  // discussion).
+  std::replace(prefix.begin(), prefix.end(), '.', '_');
-  // TODO: since we expand nested subgraphs outside-in, we should
+  std::replace(prefix.begin(), prefix.end(), ' ', '_');
-  // append the prefix to the existing prefix, if any. This is unimportant
+  std::replace(prefix.begin(), prefix.end(), ':', '_');
-  // with the meaningless prefix we use now, but it should be considered
+  absl::StrAppend(&prefix, "__");
-  // when prefixing with names.
-  std::string prefix = absl::StrCat("__sg", subgraph_index, "_");
   auto add_prefix = [&prefix](absl::string_view s) {
     return absl::StrCat(prefix, s);
   };
@@ -271,7 +273,6 @@ static ::mediapipe::Status PrefixNames(int subgraph_index,
       graph_registry ? graph_registry : &GraphRegistry::global_graph_registry;
   RET_CHECK(config);
   auto* nodes = config->mutable_node();
-  int subgraph_counter = 0;
   while (1) {
     auto subgraph_nodes_start = std::stable_partition(
         nodes->begin(), nodes->end(),
@@ -283,11 +284,13 @@ static ::mediapipe::Status PrefixNames(int subgraph_index,
     std::vector<CalculatorGraphConfig> subgraphs;
     for (auto it = subgraph_nodes_start; it != nodes->end(); ++it) {
       const auto& node = *it;
+      int node_id = it - nodes->begin();
+      std::string node_name = CanonicalNodeName(*config, node_id);
       MP_RETURN_IF_ERROR(ValidateSubgraphFields(node));
       ASSIGN_OR_RETURN(auto subgraph,
                        graph_registry->CreateByName(config->package(),
                                                     node.calculator(), &node));
-      MP_RETURN_IF_ERROR(PrefixNames(subgraph_counter++, &subgraph));
+      MP_RETURN_IF_ERROR(PrefixNames(node_name, &subgraph));
       MP_RETURN_IF_ERROR(ConnectSubgraphStreams(node, &subgraph));
       subgraphs.push_back(subgraph);
     }

mediapipe/framework/tool/subgraph_expansion_test.cc

@@ -250,6 +250,7 @@ TEST(SubgraphExpansionTest, TransformNames) {
           output_stream: "__sg0_output_1"
         }
         node {
+          name: "__sg0_SomeRegularCalculator"
           calculator: "SomeRegularCalculator"
           input_stream: "__sg0_output_1"
           output_stream: "__sg0_output_2"
@@ -438,20 +439,20 @@ TEST(SubgraphExpansionTest, ExpandSubgraphs) {
           output_stream: "foo"
         }
         node {
-          name: "__sg0_regular_node"
+          name: "testsubgraph__regular_node"
           calculator: "SomeRegularCalculator"
           input_stream: "foo"
-          output_stream: "__sg0_stream_a"
+          output_stream: "testsubgraph__stream_a"
-          input_side_packet: "__sg0_side"
+          input_side_packet: "testsubgraph__side"
         }
         node {
-          name: "__sg0_simple_sink"
+          name: "testsubgraph__simple_sink"
           calculator: "SomeSinkCalculator"
-          input_stream: "__sg0_stream_a"
+          input_stream: "testsubgraph__stream_a"
         }
         packet_generator {
           packet_generator: "SomePacketGenerator"
-          output_side_packet: "__sg0_side"
+          output_side_packet: "testsubgraph__side"
         }
       )");
   MP_EXPECT_OK(tool::ExpandSubgraphs(&supergraph));
@@ -503,8 +504,8 @@ TEST(SubgraphExpansionTest, ExecutorFieldOfNodeInSubgraphPreserved) {
           output_stream: "OUT:output"
         }
       )");
-  CalculatorGraphConfig expected_graph =
+  CalculatorGraphConfig expected_graph = ::mediapipe::ParseTextProtoOrDie<
-      ::mediapipe::ParseTextProtoOrDie<CalculatorGraphConfig>(R"(
+      CalculatorGraphConfig>(R"(
     input_stream: "input"
     executor {
       name: "custom_thread_pool"
@@ -515,6 +516,7 @@ TEST(SubgraphExpansionTest, ExecutorFieldOfNodeInSubgraphPreserved) {
     }
     node {
       calculator: "PassThroughCalculator"
+      name: "enclosingsubgraph__nodewithexecutorsubgraph__PassThroughCalculator"
       input_stream: "input"
       output_stream: "output"
       executor: "custom_thread_pool"

mediapipe/framework/validated_graph_config.cc

@@ -39,6 +39,7 @@
 #include "mediapipe/framework/status_handler.h"
 #include "mediapipe/framework/stream_handler.pb.h"
 #include "mediapipe/framework/thread_pool_executor.pb.h"
+#include "mediapipe/framework/tool/name_util.h"
 #include "mediapipe/framework/tool/status_util.h"
 #include "mediapipe/framework/tool/subgraph_expansion.h"
 #include "mediapipe/framework/tool/validate.h"
@@ -169,31 +170,6 @@ std::string DebugName(const CalculatorGraphConfig& config,
 
 }  // namespace
 
-std::string CanonicalNodeName(const CalculatorGraphConfig& graph_config,
-                              int node_id) {
-  const auto& node_config = graph_config.node(node_id);
-  std::string node_name = node_config.name().empty() ? node_config.calculator()
-                                                     : node_config.name();
-  int count = 0;
-  int sequence = 0;
-  for (int i = 0; i < graph_config.node_size(); i++) {
-    const auto& current_node_config = graph_config.node(i);
-    std::string current_node_name = current_node_config.name().empty()
-                                        ? current_node_config.calculator()
-                                        : current_node_config.name();
-    if (node_name == current_node_name) {
-      ++count;
-      if (i < node_id) {
-        ++sequence;
-      }
-    }
-  }
-  if (count <= 1) {
-    return node_name;
-  }
-  return absl::StrCat(node_name, "_", sequence + 1);
-}
-
 // static
 std::string NodeTypeInfo::NodeTypeToString(NodeType node_type) {
   switch (node_type) {

mediapipe/framework/validated_graph_config.h

@@ -33,48 +33,6 @@ namespace mediapipe {
 
 class ValidatedGraphConfig;
 
-// Returns a short unique name for a Node in a CalculatorGraphConfig.
-// This is the Node.name (if specified) or the Node.calculator.
-// If there are multiple calculators with similar name in the graph, the name
-// will be postfixed by "_<COUNT>". For example, in the following graph the node
-// names will be as mentiond.
-//
-// node { // Name will be "CalcA"
-//   calculator: "CalcA"
-// }
-// node { // Name will be "NameB"
-//   calculator: "CalcB"
-//   name: "NameB"
-// }
-// node { // Name will be "CalcC_1" due to duplicate "calculator" field.
-//   calculator: "CalcC"
-// }
-// node { // Name will be "CalcC_2" due to duplicate "calculator" field.
-//   calculator: "CalcC"
-// }
-// node { // Name will be "NameX".
-//   calculator: "CalcD"
-//   name: "NameX"
-// }
-// node { // Name will be "NameY".
-//   calculator: "CalcD"
-//   name: "NameY"
-// }
-// node { // Name will be "NameZ_1". due to "name" field duplicate.
-//   calculator: "CalcE"
-//   name: "NameZ"
-// }
-// node { // Name will be "NameZ_2". due to "name" field duplicate.
-//   calculator: "CalcF"
-//   name: "NameZ"
-// }
-//
-// TODO: Update GraphNode.UniqueName in MediaPipe Visualizer to match
-// this logic.
-// TODO: Fix the edge case mentioned in the bug.
-std::string CanonicalNodeName(const CalculatorGraphConfig& graph_config,
-                              int node_id);
-
 // Type information for a graph node (Calculator, Generator, etc).
 class NodeTypeInfo {
  public:

mediapipe/gpu/BUILD

@@ -920,6 +920,7 @@ objc_library(
 ios_unit_test(
     name = "gl_ios_test",
     minimum_os_version = MIN_IOS_VERSION,
+    runner = "//googlemac/iPhone/Shared/Testing/EarlGrey/Runner:IOS_LATEST",
     tags = [
         "ios",
     ],

mediapipe/gpu/egl_surface_holder.h

@@ -29,9 +29,9 @@ struct EglSurfaceHolder {
   // GlCalculatorHelper::RunInGlContext while holding this mutex, but instead
   // grab this inside the callable passed to them.
   absl::Mutex mutex;
-  EGLSurface surface GUARDED_BY(mutex) = EGL_NO_SURFACE;
+  EGLSurface surface ABSL_GUARDED_BY(mutex) = EGL_NO_SURFACE;
   // True if MediaPipe created the surface and is responsible for destroying it.
-  bool owned GUARDED_BY(mutex) = false;
+  bool owned ABSL_GUARDED_BY(mutex) = false;
   // Vertical flip of the surface, useful for conversion between coordinate
   // systems with top-left v.s. bottom-left origins.
   bool flip_y = false;

mediapipe/gpu/gl_context.cc

@@ -346,7 +346,7 @@ std::weak_ptr<GlContext>& GlContext::CurrentContext() {
 
 ::mediapipe::Status GlContext::SwitchContext(ContextBinding* saved_context,
                                              const ContextBinding& new_context)
-    NO_THREAD_SAFETY_ANALYSIS {
+    ABSL_NO_THREAD_SAFETY_ANALYSIS {
   std::shared_ptr<GlContext> old_context_obj = CurrentContext().lock();
   std::shared_ptr<GlContext> new_context_obj =
       new_context.context_object.lock();

mediapipe/gpu/gl_context.h

@@ -379,7 +379,7 @@ class GlContext : public std::enable_shared_from_this<GlContext> {
   // This mutex is used to guard a few different members and condition
   // variables. It should only be held for a short time.
   absl::Mutex mutex_;
-  absl::CondVar wait_for_gl_finish_cv_ GUARDED_BY(mutex_);
+  absl::CondVar wait_for_gl_finish_cv_ ABSL_GUARDED_BY(mutex_);
 
   std::unique_ptr<mediapipe::GlProfilingHelper> profiling_helper_ = nullptr;
 };

mediapipe/gpu/gl_context_internal.h

@@ -52,11 +52,11 @@ class GlContext::DedicatedThread {
 
   absl::Mutex mutex_;
   // Used to wait for a job's completion.
-  absl::CondVar gl_job_done_cv_ GUARDED_BY(mutex_);
+  absl::CondVar gl_job_done_cv_ ABSL_GUARDED_BY(mutex_);
   pthread_t gl_thread_id_;
 
-  std::deque<Job> jobs_ GUARDED_BY(mutex_);
+  std::deque<Job> jobs_ ABSL_GUARDED_BY(mutex_);
-  absl::CondVar has_jobs_cv_ GUARDED_BY(mutex_);
+  absl::CondVar has_jobs_cv_ ABSL_GUARDED_BY(mutex_);
 
   bool self_destruct_ = false;
 };

mediapipe/gpu/gl_texture_buffer_pool.h

@@ -60,7 +60,7 @@ class GlTextureBufferPool
 
   // If the total number of buffers is greater than keep_count, destroys any
   // surplus buffers that are no longer in use.
-  void TrimAvailable() EXCLUSIVE_LOCKS_REQUIRED(mutex_);
+  void TrimAvailable() ABSL_EXCLUSIVE_LOCKS_REQUIRED(mutex_);
 
   const int width_;
   const int height_;
@@ -68,8 +68,9 @@ class GlTextureBufferPool
   const int keep_count_;
 
   absl::Mutex mutex_;
-  int in_use_count_ GUARDED_BY(mutex_) = 0;
+  int in_use_count_ ABSL_GUARDED_BY(mutex_) = 0;
-  std::vector<std::unique_ptr<GlTextureBuffer>> available_ GUARDED_BY(mutex_);
+  std::vector<std::unique_ptr<GlTextureBuffer>> available_
+      ABSL_GUARDED_BY(mutex_);
 };
 
 }  // namespace mediapipe

mediapipe/gpu/gl_thread_collector.h

@@ -61,7 +61,7 @@ class GlThreadCollector {
   }
 
   absl::Mutex mutex_;
-  int active_threads_ GUARDED_BY(mutex_) = 0;
+  int active_threads_ ABSL_GUARDED_BY(mutex_) = 0;
   friend NoDestructor<GlThreadCollector>;
 };
 #else

mediapipe/gpu/gpu_buffer_multi_pool.h

@@ -107,7 +107,7 @@ class GpuBufferMultiPool {
 
   absl::Mutex mutex_;
   std::unordered_map<BufferSpec, SimplePool, BufferSpecHash> pools_
-      GUARDED_BY(mutex_);
+      ABSL_GUARDED_BY(mutex_);
   // A queue of BufferSpecs to keep track of the age of each BufferSpec added to
   // the pool.
   std::queue<BufferSpec> buffer_specs_;

mediapipe/graphs/hand_tracking/subgraphs/hand_landmark_cpu.pbtxt

@@ -51,7 +51,7 @@ node {
   }
 }
 
-# Runs a TensorFlow Lite model on GPU that takes an image tensor and outputs a
+# Runs a TensorFlow Lite model on CPU that takes an image tensor and outputs a
 # vector of tensors representing, for instance, detection boxes/keypoints and
 # scores.
 node {

mediapipe/java/com/google/mediapipe/components/AudioDataConsumer.java

@@ -15,10 +15,11 @@
 package com.google.mediapipe.components;
 
 import android.media.AudioFormat;
+import java.nio.ByteBuffer;
 
 /** Lightweight abstraction for an object that can receive audio data. */
 public interface AudioDataConsumer {
   /** Called when a new audio data buffer is available. */
   public abstract void onNewAudioData(
-      byte[] audioData, long timestampMicros, AudioFormat audioFormat);
+      ByteBuffer audioData, long timestampMicros, AudioFormat audioFormat);
 }

mediapipe/java/com/google/mediapipe/components/CameraXPreviewHelper.java

@@ -23,6 +23,7 @@ import android.hardware.camera2.CameraCharacteristics;
 import android.hardware.camera2.CameraManager;
 import android.hardware.camera2.CameraMetadata;
 import android.hardware.camera2.params.StreamConfigurationMap;
+import android.os.SystemClock;
 import android.util.Log;
 import android.util.Size;
 import androidx.camera.core.CameraX;
@@ -31,6 +32,7 @@ import androidx.camera.core.Preview;
 import androidx.camera.core.PreviewConfig;
 import java.util.Arrays;
 import java.util.List;
+import javax.annotation.Nullable;
 
 /**
  * Uses CameraX APIs for camera setup and access.
@@ -43,6 +45,9 @@ public class CameraXPreviewHelper extends CameraHelper {
   // Target frame and view resolution size in landscape.
   private static final Size TARGET_SIZE = new Size(1280, 720);
 
+  // Number of attempts for calculating the offset between the camera's clock and MONOTONIC clock.
+  private static final int CLOCK_OFFSET_CALIBRATION_ATTEMPTS = 3;
+
   private Preview preview;
 
   // Size of the camera-preview frames from the camera.
@@ -50,9 +55,16 @@ public class CameraXPreviewHelper extends CameraHelper {
   // Rotation of the camera-preview frames in degrees.
   private int frameRotation;
 
-  // Focal length resolved in pixels on the frame texture.
+  @Nullable private CameraCharacteristics cameraCharacteristics = null;
-  private float focalLengthPixels;
+
-  private CameraCharacteristics cameraCharacteristics = null;
+  // Focal length resolved in pixels on the frame texture. If it cannot be determined, this value
+  // is Float.MIN_VALUE.
+  private float focalLengthPixels = Float.MIN_VALUE;
+
+  // Timestamp source of camera. This is retrieved from
+  // CameraCharacteristics.SENSOR_INFO_TIMESTAMP_SOURCE. When CameraCharacteristics is not available
+  // the source is CameraCharacteristics.SENSOR_INFO_TIMESTAMP_SOURCE_UNKNOWN.
+  private int cameraTimestampSource = CameraCharacteristics.SENSOR_INFO_TIMESTAMP_SOURCE_UNKNOWN;
 
   @Override
   @SuppressWarnings("RestrictTo") // See b/132705545.
@@ -78,11 +90,21 @@ public class CameraXPreviewHelper extends CameraHelper {
               return;
             }
           }
+
           Integer selectedLensFacing =
               cameraFacing == CameraHelper.CameraFacing.FRONT
                   ? CameraMetadata.LENS_FACING_FRONT
                   : CameraMetadata.LENS_FACING_BACK;
-          calculateFocalLength(context, selectedLensFacing);
+          cameraCharacteristics = getCameraCharacteristics(context, selectedLensFacing);
+          if (cameraCharacteristics != null) {
+            // Queries camera timestamp source. It should be one of REALTIME or UNKNOWN as
+            // documented in
+            // https://developer.android.com/reference/android/hardware/camera2/CameraCharacteristics.html#SENSOR_INFO_TIMESTAMP_SOURCE.
+            cameraTimestampSource =
+                cameraCharacteristics.get(CameraCharacteristics.SENSOR_INFO_TIMESTAMP_SOURCE);
+            focalLengthPixels = calculateFocalLengthInPixels();
+          }
+
           if (onCameraStartedListener != null) {
             onCameraStartedListener.onCameraStarted(previewOutput.getSurfaceTexture());
           }
@@ -108,6 +130,7 @@ public class CameraXPreviewHelper extends CameraHelper {
     return optimalSize != null ? optimalSize : frameSize;
   }
 
+  @Nullable
   private Size getOptimalViewSize(Size targetSize) {
     if (cameraCharacteristics != null) {
       StreamConfigurationMap map =
@@ -142,11 +165,70 @@ public class CameraXPreviewHelper extends CameraHelper {
     return null;
   }
 
+  // Computes the difference between the camera's clock and MONOTONIC clock using camera's
+  // timestamp source information. This function assumes by default that the camera timestamp
+  // source is aligned to CLOCK_MONOTONIC. This is useful when the camera is being used
+  // synchronously with other sensors that yield timestamps in the MONOTONIC timebase, such as
+  // AudioRecord for audio data. The offset is returned in nanoseconds.
+  public long getTimeOffsetToMonoClockNanos() {
+    if (cameraTimestampSource == CameraMetadata.SENSOR_INFO_TIMESTAMP_SOURCE_REALTIME) {
+      // This clock shares the same timebase as SystemClock.elapsedRealtimeNanos(), see
+      // https://developer.android.com/reference/android/hardware/camera2/CameraMetadata.html#SENSOR_INFO_TIMESTAMP_SOURCE_REALTIME.
+      return getOffsetFromRealtimeTimestampSource();
+    } else {
+      return getOffsetFromUnknownTimestampSource();
+    }
+  }
+
+  private static long getOffsetFromUnknownTimestampSource() {
+    // Implementation-wise, this timestamp source has the same timebase as CLOCK_MONOTONIC, see
+    // https://stackoverflow.com/questions/38585761/what-is-the-timebase-of-the-timestamp-of-cameradevice.
+    return 0L;
+  }
+
+  private static long getOffsetFromRealtimeTimestampSource() {
+    // Measure the offset of the REALTIME clock w.r.t. the MONOTONIC clock. Do
+    // CLOCK_OFFSET_CALIBRATION_ATTEMPTS measurements and choose the offset computed with the
+    // smallest delay between measurements. When the camera returns a timestamp ts, the
+    // timestamp in MONOTONIC timebase will now be (ts + cameraTimeOffsetToMonoClock).
+    long offset = Long.MAX_VALUE;
+    long lowestGap = Long.MAX_VALUE;
+    for (int i = 0; i < CLOCK_OFFSET_CALIBRATION_ATTEMPTS; ++i) {
+      long startMonoTs = System.nanoTime();
+      long realTs = SystemClock.elapsedRealtimeNanos();
+      long endMonoTs = System.nanoTime();
+      long gapMonoTs = endMonoTs - startMonoTs;
+      if (gapMonoTs < lowestGap) {
+        lowestGap = gapMonoTs;
+        offset = (startMonoTs + endMonoTs) / 2 - realTs;
+      }
+    }
+    return offset;
+  }
+
   public float getFocalLengthPixels() {
     return focalLengthPixels;
   }
 
-  private void calculateFocalLength(Activity context, Integer lensFacing) {
+  // Computes the focal length of the camera in pixels based on lens and sensor properties.
+  private float calculateFocalLengthInPixels() {
+    // Focal length of the camera in millimeters.
+    // Note that CameraCharacteristics returns a list of focal lengths and there could be more
+    // than one focal length available if optical zoom is enabled or there are multiple physical
+    // cameras in the logical camera referenced here. A theoretically correct of doing this would
+    // be to use the focal length set explicitly via Camera2 API, as documented in
+    // https://developer.android.com/reference/android/hardware/camera2/CaptureRequest#LENS_FOCAL_LENGTH.
+    float focalLengthMm =
+        cameraCharacteristics.get(CameraCharacteristics.LENS_INFO_AVAILABLE_FOCAL_LENGTHS)[0];
+    // Sensor Width of the camera in millimeters.
+    float sensorWidthMm =
+        cameraCharacteristics.get(CameraCharacteristics.SENSOR_INFO_PHYSICAL_SIZE).getWidth();
+    return frameSize.getWidth() * focalLengthMm / sensorWidthMm;
+  }
+
+  @Nullable
+  private static CameraCharacteristics getCameraCharacteristics(
+      Activity context, Integer lensFacing) {
     CameraManager cameraManager = (CameraManager) context.getSystemService(Context.CAMERA_SERVICE);
     try {
       List<String> cameraList = Arrays.asList(cameraManager.getCameraIdList());
@@ -159,24 +241,12 @@ public class CameraXPreviewHelper extends CameraHelper {
           continue;
         }
         if (availableLensFacing.equals(lensFacing)) {
-          cameraCharacteristics = availableCameraCharacteristics;
+          return availableCameraCharacteristics;
-          break;
         }
       }
-      // Focal length of the camera in millimeters.
-      // Note that CameraCharacteristics returns a list of focal lengths and there could be more
-      // than one focal length available if optical zoom is enabled or there are multiple physical
-      // cameras in the logical camera referenced here. A theoretically correct of doing this would
-      // be to use the focal length set explicitly via Camera2 API, as documented in
-      // https://developer.android.com/reference/android/hardware/camera2/CaptureRequest#LENS_FOCAL_LENGTH.
-      float focalLengthMm =
-          cameraCharacteristics.get(CameraCharacteristics.LENS_INFO_AVAILABLE_FOCAL_LENGTHS)[0];
-      // Sensor Width of the camera in millimeters.
-      float sensorWidthMm =
-          cameraCharacteristics.get(CameraCharacteristics.SENSOR_INFO_PHYSICAL_SIZE).getWidth();
-      focalLengthPixels = frameSize.getWidth() * focalLengthMm / sensorWidthMm;
     } catch (CameraAccessException e) {
       Log.e(TAG, "Accessing camera ID info got error: " + e);
     }
+    return null;
   }
 }

mediapipe/java/com/google/mediapipe/components/ExternalTextureConverter.java

@@ -74,6 +74,15 @@ public class ExternalTextureConverter implements TextureFrameProducer {
     thread.setFlipY(flip);
   }
 
+  /**
+   * Sets an offset that can be used to adjust the timestamps on the camera frames, for example to
+   * conform to a preferred time-base or to account for a known device latency. The offset is added
+   * to each frame timetamp read by the ExternalTextureConverter.
+   */
+  public void setTimestampOffsetNanos(long offsetInNanos) {
+    thread.setTimestampOffsetNanos(offsetInNanos);
+  }
+
   public ExternalTextureConverter(EGLContext parentContext) {
     this(parentContext, DEFAULT_NUM_BUFFERS);
   }
@@ -148,7 +157,8 @@ public class ExternalTextureConverter implements TextureFrameProducer {
     private List<AppTextureFrame> outputFrames = null;
     private int outputFrameIndex = -1;
     private ExternalTextureRenderer renderer = null;
-    private long timestampOffset = 0;
+    private long nextFrameTimestampOffset = 0;
+    private long timestampOffsetNanos = 0;
     private long previousTimestamp = 0;
     private boolean previousTimestampValid = false;
 
@@ -229,6 +239,10 @@ public class ExternalTextureConverter implements TextureFrameProducer {
       super.releaseGl(); // This releases the EGL context, so must do it after any GL calls.
     }
 
+    public void setTimestampOffsetNanos(long offsetInNanos) {
+      timestampOffsetNanos = offsetInNanos;
+    }
+
     protected void renderNext(SurfaceTexture fromTexture) {
       if (fromTexture != surfaceTexture) {
         // Although the setSurfaceTexture and renderNext methods are correctly sequentialized on
@@ -333,13 +347,15 @@ public class ExternalTextureConverter implements TextureFrameProducer {
       renderer.render(surfaceTexture);
 
       // Populate frame timestamp with surface texture timestamp after render() as renderer
-      // ensures that surface texture has the up-to-date timestamp. (Also adjust |timestampOffset|
+      // ensures that surface texture has the up-to-date timestamp. (Also adjust
-      // to ensure that timestamps increase monotonically.)
+      // |nextFrameTimestampOffset| to ensure that timestamps increase monotonically.)
-      long textureTimestamp = surfaceTexture.getTimestamp() / NANOS_PER_MICRO;
+      long textureTimestamp =
-      if (previousTimestampValid && textureTimestamp + timestampOffset <= previousTimestamp) {
+          (surfaceTexture.getTimestamp() + timestampOffsetNanos) / NANOS_PER_MICRO;
-        timestampOffset = previousTimestamp + 1 - textureTimestamp;
+      if (previousTimestampValid
+          && textureTimestamp + nextFrameTimestampOffset <= previousTimestamp) {
+        nextFrameTimestampOffset = previousTimestamp + 1 - textureTimestamp;
       }
-      outputFrame.setTimestamp(textureTimestamp + timestampOffset);
+      outputFrame.setTimestamp(textureTimestamp + nextFrameTimestampOffset);
       previousTimestamp = outputFrame.getTimestamp();
       previousTimestampValid = true;
     }

mediapipe/java/com/google/mediapipe/components/MicrophoneHelper.java

@@ -21,6 +21,8 @@ import android.media.MediaRecorder.AudioSource;
 import android.os.Build.VERSION;
 import android.os.Build.VERSION_CODES;
 import android.util.Log;
+import com.google.common.base.Preconditions;
+import java.nio.ByteBuffer;
 
 /** Provides access to audio data from a microphone. */
 public class MicrophoneHelper implements AudioDataProducer {
@@ -42,10 +44,10 @@ public class MicrophoneHelper implements AudioDataProducer {
   // constant favor faster blocking calls to AudioRecord.read(...).
   private static final int MAX_READ_INTERVAL_SEC = 1;
 
-  // This class uses AudioFormat.ENCODING_PCM_16BIT, i.e. 16 bits per single channel sample.
+  // This class uses AudioFormat.ENCODING_PCM_16BIT, i.e. 16 bits per sample.
-  private static final int BYTES_PER_MONO_SAMPLE = 2;
+  private static final int BYTES_PER_SAMPLE = 2;
 
-  private static final long UNINITIALIZED_TIMESTAMP = -1;
+  private static final long UNINITIALIZED_TIMESTAMP = Long.MIN_VALUE;
   private static final long NANOS_PER_MICROS = 1000;
   private static final long MICROS_PER_SECOND = 1000000;
 
@@ -54,22 +56,16 @@ public class MicrophoneHelper implements AudioDataProducer {
   // Channel configuration of audio source, one of AudioRecord.CHANNEL_IN_MONO or
   // AudioRecord.CHANNEL_IN_STEREO.
   private final int channelConfig;
+  // Bytes per audio frame. A frame is defined as a multi-channel audio sample. Possible values are
+  // 2 bytes for 1 channel, or 4 bytes for 2 channel audio.
+  private final int bytesPerFrame;
   // Data storage allocated to record audio samples in a single function call to AudioRecord.read().
   private final int bufferSize;
-  // Bytes used per sample, accounts for number of channels of audio source. Possible values are 2
-  // bytes for a 1-channel sample and 4 bytes for a 2-channel sample.
-  private final int bytesPerSample;
 
-  private byte[] audioData;
-
-  // Timestamp provided by the AudioTimestamp object.
-  private AudioTimestamp audioTimestamp;
   // Initial timestamp base. Can be set by the client so that all timestamps calculated using the
-  // number of samples read per AudioRecord.read() function call start from this timestamp.
+  // number of samples read per AudioRecord.read() function call start from this timestamp. If it
-  private long initialTimestamp = UNINITIALIZED_TIMESTAMP;
+  // is not set by the client, then every startMicrophone(...) call marks a value for it.
-  // The total number of samples read from multiple calls to AudioRecord.read(). This is reset to
+  private long initialTimestampMicros = UNINITIALIZED_TIMESTAMP;
-  // zero for every startMicrophone() call.
-  private long totalNumSamplesRead;
 
   // AudioRecord is used to setup a way to record data from the audio source. See
   // https://developer.android.com/reference/android/media/AudioRecord.htm for details.
@@ -99,9 +95,9 @@ public class MicrophoneHelper implements AudioDataProducer {
     this.channelConfig = channelConfig;
 
     // Number of channels of audio source, depending on channelConfig.
-    final int channelCount = channelConfig == AudioFormat.CHANNEL_IN_STEREO ? 2 : 1;
+    final int numChannels = channelConfig == AudioFormat.CHANNEL_IN_STEREO ? 2 : 1;
 
-    bytesPerSample = BYTES_PER_MONO_SAMPLE * channelCount;
+    bytesPerFrame = BYTES_PER_SAMPLE * numChannels;
 
     // The minimum buffer size required by AudioRecord.
     final int minBufferSize =
@@ -115,14 +111,13 @@ public class MicrophoneHelper implements AudioDataProducer {
     // from the audio stream in each AudioRecord.read(...) call.
     if (minBufferSize == AudioRecord.ERROR || minBufferSize == AudioRecord.ERROR_BAD_VALUE) {
       Log.e(TAG, "AudioRecord minBufferSize unavailable.");
-      bufferSize = sampleRateInHz * MAX_READ_INTERVAL_SEC * bytesPerSample * BUFFER_SIZE_MULTIPLIER;
+      bufferSize = sampleRateInHz * MAX_READ_INTERVAL_SEC * bytesPerFrame * BUFFER_SIZE_MULTIPLIER;
     } else {
       bufferSize = minBufferSize * BUFFER_SIZE_MULTIPLIER;
     }
   }
 
   private void setupAudioRecord() {
-    audioData = new byte[bufferSize];
 
     Log.d(TAG, "AudioRecord(" + sampleRateInHz + ", " + bufferSize + ")");
     audioFormat =
@@ -148,24 +143,18 @@ public class MicrophoneHelper implements AudioDataProducer {
             () -> {
               android.os.Process.setThreadPriority(android.os.Process.THREAD_PRIORITY_AUDIO);
 
-              // Initial timestamp in case the AudioRecord.getTimestamp() function is unavailable.
+              // The total number of frames read from multiple calls to AudioRecord.read() in this
-              long startTimestamp =
+              // recording thread.
-                  initialTimestamp != UNINITIALIZED_TIMESTAMP
+              int totalNumFramesRead = 0;
-                      ? initialTimestamp
-                      : System.nanoTime() / NANOS_PER_MICROS;
-              long sampleBasedTimestamp;
               while (recording) {
                 if (audioRecord == null) {
                   break;
                 }
-                final int numBytesRead =
+                // TODO: Fix audio data cloning.
-                    audioRecord.read(audioData, /*offsetInBytes=*/ 0, /*sizeInBytes=*/ bufferSize);
+                ByteBuffer audioData = ByteBuffer.allocateDirect(bufferSize);
-                // If AudioRecord.getTimestamp() is unavailable, calculate the timestamp using the
+                final int numBytesRead = audioRecord.read(audioData, /*sizeInBytes=*/ bufferSize);
-                // number of samples read in the call to AudioRecord.read().
+                // Get the timestamp of the first audio frame in the latest read call.
-                long sampleBasedFallbackTimestamp =
+                long timestampMicros = getTimestampMicros(totalNumFramesRead);
-                    startTimestamp + totalNumSamplesRead * MICROS_PER_SECOND / sampleRateInHz;
-                sampleBasedTimestamp =
-                    getTimestamp(/*fallbackTimestamp=*/ sampleBasedFallbackTimestamp);
                 if (numBytesRead <= 0) {
                   if (numBytesRead == AudioRecord.ERROR_INVALID_OPERATION) {
                     Log.e(TAG, "ERROR_INVALID_OPERATION");
@@ -179,37 +168,65 @@ public class MicrophoneHelper implements AudioDataProducer {
                 // stopMicrophone() wasn't called. If the consumer called stopMicrophone(), discard
                 // the data read in the latest AudioRecord.read(...) function call.
                 if (recording && consumer != null) {
-                  // TODO: Refactor audioData buffer cloning.
+                  consumer.onNewAudioData(audioData, timestampMicros, audioFormat);
-                  consumer.onNewAudioData(audioData.clone(), sampleBasedTimestamp, audioFormat);
                 }
 
-                // TODO: Replace byte[] with short[] audioData.
                 // It is expected that audioRecord.read() will read full samples and therefore
-                // numBytesRead is expected to be a multiple of bytesPerSample.
+                // numBytesRead is expected to be a multiple of bytesPerFrame.
-                int numSamplesRead = numBytesRead / bytesPerSample;
+                int numFramesRead = numBytesRead / bytesPerFrame;
-                totalNumSamplesRead += numSamplesRead;
+                totalNumFramesRead += numFramesRead;
               }
-            });
+            },
+            "microphoneHelperRecordingThread");
   }
 
   // If AudioRecord.getTimestamp() is available and returns without error, this function returns the
   // timestamp using AudioRecord.getTimestamp(). If the function is unavailable, it returns a
-  // fallbackTimestamp provided as an argument to this method.
+  // fallback timestamp calculated using number of samples read so far.
-  private long getTimestamp(long fallbackTimestamp) {
+  // Use numFramesRead to be the frame count before the latest AudioRecord.read(...) call to get
+  // the timestamp of the first audio frame in the latest AudioRecord.read(...) call.
+  private long getTimestampMicros(long numFramesRead) {
+    AudioTimestamp audioTimestamp = getAudioRecordTimestamp();
+    if (audioTimestamp == null) {
+      if (numFramesRead == 0) {
+        initialTimestampMicros = markInitialTimestamp();
+      }
+
+      // If AudioRecord.getTimestamp() is unavailable, calculate the timestamp using the
+      // number of frames read in the call to AudioRecord.read().
+      return initialTimestampMicros + numFramesRead * getMicrosPerSample();
+    }
+    // If audioTimestamp.framePosition is ahead of numFramesRead so far, then the offset is
+    // negative.
+    long frameOffset = numFramesRead - audioTimestamp.framePosition;
+    long audioTsMicros = audioTimestamp.nanoTime / NANOS_PER_MICROS;
+    return audioTsMicros + frameOffset * getMicrosPerSample();
+  }
+
+  private long markInitialTimestamp() {
+    return initialTimestampMicros != UNINITIALIZED_TIMESTAMP
+        ? initialTimestampMicros
+        : System.nanoTime() / NANOS_PER_MICROS;
+  }
+
+  private long getMicrosPerSample() {
+    return MICROS_PER_SECOND / sampleRateInHz;
+  }
+
+  private AudioTimestamp getAudioRecordTimestamp() {
+    Preconditions.checkNotNull(audioRecord);
     // AudioRecord.getTimestamp is only available at API Level 24 and above.
     // https://developer.android.com/reference/android/media/AudioRecord.html#getTimestamp(android.media.AudioTimestamp,%20int).
     if (VERSION.SDK_INT >= VERSION_CODES.N) {
-      if (audioTimestamp == null) {
+      AudioTimestamp audioTimestamp = new AudioTimestamp();
-        audioTimestamp = new AudioTimestamp();
-      }
       int status = audioRecord.getTimestamp(audioTimestamp, AudioTimestamp.TIMEBASE_MONOTONIC);
       if (status == AudioRecord.SUCCESS) {
-        return audioTimestamp.nanoTime / NANOS_PER_MICROS;
+        return audioTimestamp;
       } else {
         Log.e(TAG, "audioRecord.getTimestamp failed with status: " + status);
       }
     }
-    return fallbackTimestamp;
+    return null;
   }
 
   // Returns the buffer size read by this class per AudioRecord.read() call.
@@ -221,8 +238,8 @@ public class MicrophoneHelper implements AudioDataProducer {
    * Overrides the use of system time as the source of timestamps for audio packets. Not
    * recommended. Provided to maintain compatibility with existing usage by CameraRecorder.
    */
-  public void setInitialTimestamp(long initialTimestamp) {
+  public void setInitialTimestampMicros(long initialTimestampMicros) {
-    this.initialTimestamp = initialTimestamp;
+    this.initialTimestampMicros = initialTimestampMicros;
   }
 
   // This method sets up a new AudioRecord object for reading audio data from the microphone. It
@@ -241,7 +258,6 @@ public class MicrophoneHelper implements AudioDataProducer {
     }
 
     recording = true;
-    totalNumSamplesRead = 0;
     recordingThread.start();
 
     Log.d(TAG, "AudioRecord is recording audio.");
@@ -256,6 +272,7 @@ public class MicrophoneHelper implements AudioDataProducer {
 
   // Stops the AudioRecord object from reading data from the microphone.
   public void stopMicrophoneWithoutCleanup() {
+    Preconditions.checkNotNull(audioRecord);
     if (!recording) {
       return;
     }
@@ -277,6 +294,7 @@ public class MicrophoneHelper implements AudioDataProducer {
 
   // Releases the AudioRecord object when there is no ongoing recording.
   public void cleanup() {
+    Preconditions.checkNotNull(audioRecord);
     if (recording) {
       return;
     }

mediapipe/java/com/google/mediapipe/framework/jni/jni_util.cc

@@ -22,7 +22,7 @@
 namespace {
 
 ABSL_CONST_INIT absl::Mutex g_jvm_mutex(absl::kConstInit);
-JavaVM* g_jvm GUARDED_BY(g_jvm_mutex);
+JavaVM* g_jvm ABSL_GUARDED_BY(g_jvm_mutex);
 
 class JvmThread {
  public:

mediapipe/objc/MPPCameraInputSource.h

@@ -34,6 +34,9 @@
 /// Whether to rotate video buffers with device rotation.
 @property(nonatomic) BOOL autoRotateBuffers;
 
+/// The camera intrinsic matrix.
+@property(nonatomic, readonly) matrix_float3x3 cameraIntrinsicMatrix;
+
 /// The capture session.
 @property(nonatomic, readonly) AVCaptureSession *session;
 

mediapipe/objc/MPPCameraInputSource.m

@@ -25,7 +25,7 @@
   AVCaptureDeviceInput* _videoDeviceInput;
   AVCaptureVideoDataOutput* _videoDataOutput;
   AVCaptureDepthDataOutput* _depthDataOutput;
-  AVCaptureDevice *_currentDevice;
+  AVCaptureDevice* _currentDevice;
 
   matrix_float3x3 _cameraIntrinsicMatrix;
   OSType _pixelFormatType;
@@ -50,8 +50,7 @@
   return self;
 }
 
-- (void)setDelegate:(id<MPPInputSourceDelegate>)delegate
+- (void)setDelegate:(id<MPPInputSourceDelegate>)delegate queue:(dispatch_queue_t)queue {
-              queue:(dispatch_queue_t)queue {
   [super setDelegate:delegate queue:queue];
   // Note that _depthDataOutput and _videoDataOutput may not have been created yet. In that case,
   // this message to nil is ignored, and the delegate will be set later by setupCamera.
@@ -157,9 +156,7 @@
 - (void)setPixelFormatType:(OSType)pixelFormatType {
   _pixelFormatType = pixelFormatType;
   if ([self isRunning]) {
-    _videoDataOutput.videoSettings = @{
+    _videoDataOutput.videoSettings = @{(id)kCVPixelBufferPixelFormatTypeKey : @(_pixelFormatType)};
-      (id)kCVPixelBufferPixelFormatTypeKey : @(_pixelFormatType)
-    };
   }
 }
 
@@ -181,10 +178,10 @@
   }
 
   AVCaptureDeviceDiscoverySession* deviceDiscoverySession = [AVCaptureDeviceDiscoverySession
-      discoverySessionWithDeviceTypes:@[
+      discoverySessionWithDeviceTypes:@[ _cameraPosition == AVCaptureDevicePositionFront &&
-                            _cameraPosition == AVCaptureDevicePositionFront && _useDepth ?
+                                                 _useDepth
-                              AVCaptureDeviceTypeBuiltInTrueDepthCamera :
+                                             ? AVCaptureDeviceTypeBuiltInTrueDepthCamera
-                              AVCaptureDeviceTypeBuiltInWideAngleCamera]
+                                             : AVCaptureDeviceTypeBuiltInWideAngleCamera ]
                             mediaType:AVMediaTypeVideo
                              position:_cameraPosition];
   AVCaptureDevice* videoDevice =
@@ -211,9 +208,7 @@
     //   kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange,
     //   kCVPixelFormatType_420YpCbCr8BiPlanarFullRange,
     //   kCVPixelFormatType_32BGRA.
-    _videoDataOutput.videoSettings = @{
+    _videoDataOutput.videoSettings = @{(id)kCVPixelBufferPixelFormatTypeKey : @(_pixelFormatType)};
-      (id)kCVPixelBufferPixelFormatTypeKey : @(_pixelFormatType)
-    };
   }
 
   // Remove Old Depth Depth
@@ -235,8 +230,7 @@
       if (self.delegateQueue) {
         [_depthDataOutput setDelegate:self callbackQueue:self.delegateQueue];
       }
-    }
+    } else
-    else
       _depthDataOutput = nil;
   }
 
@@ -269,15 +263,8 @@
 
 // Receives frames from the camera. Invoked on self.frameHandlerQueue.
 - (void)captureOutput:(AVCaptureOutput*)captureOutput
-didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer
+    didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer
            fromConnection:(AVCaptureConnection*)connection {
-  CVPixelBufferRef imageBuffer = CMSampleBufferGetImageBuffer(sampleBuffer);
-  CMTime timestamp = CMSampleBufferGetPresentationTimeStamp(sampleBuffer);
-  if ([self.delegate respondsToSelector:@selector(processVideoFrame:timestamp:fromSource:)]) {
-    [self.delegate processVideoFrame:imageBuffer timestamp:timestamp fromSource:self];
-  } else if ([self.delegate respondsToSelector:@selector(processVideoFrame:fromSource:)]) {
-    [self.delegate processVideoFrame:imageBuffer fromSource:self];
-  }
   if (!_didReadCameraIntrinsicMatrix) {
     // Get camera intrinsic matrix.
     CFTypeRef cameraIntrinsicData =
@@ -291,15 +278,22 @@ didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer
     }
     _didReadCameraIntrinsicMatrix = YES;
   }
+  CVPixelBufferRef imageBuffer = CMSampleBufferGetImageBuffer(sampleBuffer);
+  CMTime timestamp = CMSampleBufferGetPresentationTimeStamp(sampleBuffer);
+  if ([self.delegate respondsToSelector:@selector(processVideoFrame:timestamp:fromSource:)]) {
+    [self.delegate processVideoFrame:imageBuffer timestamp:timestamp fromSource:self];
+  } else if ([self.delegate respondsToSelector:@selector(processVideoFrame:fromSource:)]) {
+    [self.delegate processVideoFrame:imageBuffer fromSource:self];
+  }
 }
 
 #pragma mark - AVCaptureDepthDataOutputDelegate methods
 
 // Receives depth frames from the camera. Invoked on self.frameHandlerQueue.
-- (void)depthDataOutput:(AVCaptureDepthDataOutput *)output
+- (void)depthDataOutput:(AVCaptureDepthDataOutput*)output
-     didOutputDepthData:(AVDepthData *)depthData
+     didOutputDepthData:(AVDepthData*)depthData
               timestamp:(CMTime)timestamp
-             connection:(AVCaptureConnection *)connection {
+             connection:(AVCaptureConnection*)connection {
   if (depthData.depthDataType != kCVPixelFormatType_DepthFloat32) {
     depthData = [depthData depthDataByConvertingToDepthDataType:kCVPixelFormatType_DepthFloat32];
   }

mediapipe/objc/util.cc

@@ -312,6 +312,10 @@ CVPixelBufferRef CreateCVPixelBufferForImageFramePacket(
       pixel_format = kCVPixelFormatType_OneComponent8;
       break;
 
+    case mediapipe::ImageFormat::VEC32F1:
+      pixel_format = kCVPixelFormatType_OneComponent32Float;
+      break;
+
     default:
       return ::mediapipe::UnknownErrorBuilder(MEDIAPIPE_LOC)
              << "unsupported ImageFrame format: " << image_format;

mediapipe/util/tracking/box_tracker.h

@@ -193,17 +193,17 @@ class BoxTracker {
   }
 
   // Returns true if any tracking is ongoing for the specified id.
-  bool IsTrackingOngoingForId(int id) LOCKS_EXCLUDED(status_mutex_);
+  bool IsTrackingOngoingForId(int id) ABSL_LOCKS_EXCLUDED(status_mutex_);
 
   // Returns true if any tracking is ongoing.
-  bool IsTrackingOngoing() LOCKS_EXCLUDED(status_mutex_);
+  bool IsTrackingOngoing() ABSL_LOCKS_EXCLUDED(status_mutex_);
 
   // Cancels all ongoing tracks. To avoid race conditions all NewBoxTrack's in
   // flight will also be canceled. Future NewBoxTrack's will be canceled.
   // NOTE: To resume execution, you have to call ResumeTracking() before
   //       issuing more NewBoxTrack calls.
-  void CancelAllOngoingTracks() LOCKS_EXCLUDED(status_mutex_);
+  void CancelAllOngoingTracks() ABSL_LOCKS_EXCLUDED(status_mutex_);
-  void ResumeTracking() LOCKS_EXCLUDED(status_mutex_);
+  void ResumeTracking() ABSL_LOCKS_EXCLUDED(status_mutex_);
 
   // Waits for all ongoing tracks to complete.
   // Optionally accepts a timeout in microseconds (== 0 for infinite wait).
@@ -212,7 +212,7 @@ class BoxTracker {
   // be called before destructing the BoxTracker object or dangeling running
   // threads might try to access invalid data.
   bool WaitForAllOngoingTracks(int timeout_us = 0)
-      LOCKS_EXCLUDED(status_mutex_);
+      ABSL_LOCKS_EXCLUDED(status_mutex_);
 
   // Debug function to obtain raw TrackingData closest to the specified
   // timestamp. This call will read from disk on every invocation so it is
@@ -247,7 +247,7 @@ class BoxTracker {
   // Waits with timeout for chunkfile to become available. Returns true on
   // success, false if waited till timeout or when canceled.
   bool WaitForChunkFile(int id, int checkpoint, const std::string& chunk_file)
-      LOCKS_EXCLUDED(status_mutex_);
+      ABSL_LOCKS_EXCLUDED(status_mutex_);
 
   // Determines closest index in passed TrackingDataChunk
   int ClosestFrameIndex(int64 msec, const TrackingDataChunk& chunk) const;
@@ -305,26 +305,27 @@ class BoxTracker {
   // Ids are scheduled exclusively, run this method to acquire lock.
   // Returns false if id could not be scheduled (e.g. id got canceled during
   // waiting).
-  bool WaitToScheduleId(int id) LOCKS_EXCLUDED(status_mutex_);
+  bool WaitToScheduleId(int id) ABSL_LOCKS_EXCLUDED(status_mutex_);
 
   // Signals end of scheduling phase. Requires status mutex to be held.
-  void DoneSchedulingId(int id) EXCLUSIVE_LOCKS_REQUIRED(status_mutex_);
+  void DoneSchedulingId(int id) ABSL_EXCLUSIVE_LOCKS_REQUIRED(status_mutex_);
 
   // Removes all checkpoints within vicinity of new checkpoint.
   void RemoveCloseCheckpoints(int id, int checkpoint)
-      EXCLUSIVE_LOCKS_REQUIRED(status_mutex_);
+      ABSL_EXCLUSIVE_LOCKS_REQUIRED(status_mutex_);
 
   // Removes specific checkpoint.
   void ClearCheckpoint(int id, int checkpoint)
-      EXCLUSIVE_LOCKS_REQUIRED(status_mutex_);
+      ABSL_EXCLUSIVE_LOCKS_REQUIRED(status_mutex_);
 
   // Terminates tracking for specific id and checkpoint.
   void CancelTracking(int id, int checkpoint)
-      EXCLUSIVE_LOCKS_REQUIRED(status_mutex_);
+      ABSL_EXCLUSIVE_LOCKS_REQUIRED(status_mutex_);
 
   // Implementation function for IsTrackingOngoing assuming mutex is already
   // held.
-  bool IsTrackingOngoingMutexHeld() EXCLUSIVE_LOCKS_REQUIRED(status_mutex_);
+  bool IsTrackingOngoingMutexHeld()
+      ABSL_EXCLUSIVE_LOCKS_REQUIRED(status_mutex_);
 
   // Captures tracking status for each checkpoint
   struct TrackStatus {
@@ -337,21 +338,21 @@ class BoxTracker {
 
  private:
   // Stores computed tracking paths_ for all boxes.
-  std::unordered_map<int, Path> paths_ GUARDED_BY(path_mutex_);
+  std::unordered_map<int, Path> paths_ ABSL_GUARDED_BY(path_mutex_);
   absl::Mutex path_mutex_;
 
   // For each id and each checkpoint stores current tracking status.
   std::unordered_map<int, std::map<int, TrackStatus>> track_status_
-      GUARDED_BY(status_mutex_);
+      ABSL_GUARDED_BY(status_mutex_);
 
   // Keeps track which ids are currently processing in NewBoxTrack.
-  std::unordered_map<int, bool> new_box_track_ GUARDED_BY(status_mutex_);
+  std::unordered_map<int, bool> new_box_track_ ABSL_GUARDED_BY(status_mutex_);
   absl::Mutex status_mutex_;
 
-  bool canceling_ GUARDED_BY(status_mutex_) = false;
+  bool canceling_ ABSL_GUARDED_BY(status_mutex_) = false;
 
   // Use to signal changes to status_condvar_;
-  absl::CondVar status_condvar_ GUARDED_BY(status_mutex_);
+  absl::CondVar status_condvar_ ABSL_GUARDED_BY(status_mutex_);
 
   BoxTrackerOptions options_;
 

mediapipe/util/tracking/parallel_invoker.h

@@ -332,7 +332,7 @@ void ParallelFor(size_t start, size_t end, size_t grain_size,
       struct {
         absl::Mutex mutex;
         absl::CondVar completed;
-        int iterations_remain GUARDED_BY(mutex);
+        int iterations_remain ABSL_GUARDED_BY(mutex);
       } loop;
       {
         absl::MutexLock lock(&loop.mutex);

third_party/easyexif.BUILD

@@ -0,0 +1,11 @@
+package(default_visibility = ["//visibility:public"])
+
+licenses(["notice"])  # BSD License.
+
+exports_files(["LICENSE"])
+
+cc_library(
+    name = "easyexif",
+    srcs = ["exif.cpp"],
+    hdrs = ["exif.h"],
+)