Added MPPTaskImage for iOS vision tasks

mediapipe/tasks/ios/vision/core/BUILD

@@ -0,0 +1,15 @@
+package(default_visibility = ["//mediapipe/tasks:internal"])
+
+licenses(["notice"])
+
+objc_library(
+    name = "MPPTaskImage",
+    srcs = ["sources/MPPTaskImage.h"],
+    hdrs = ["sources/MPPTaskImage.m"],
+    module_name = "MPPTaskImage",
+    sdk_frameworks = [
+        "CoreMedia",
+        "CoreVideo",
+        "UIKit",
+    ]
+)

mediapipe/tasks/ios/vision/core/sources/MPPImage.h

@@ -0,0 +1,178 @@
+// Copyright 2023 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.
+
+#import <CoreMedia/CoreMedia.h>
+#import <CoreVideo/CoreVideo.h>
+#import <UIKit/UIKit.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+/** Types of image sources. */
+typedef NSInteger GMLImageSourceType NS_TYPED_ENUM NS_SWIFT_NAME(MLImageSourceType);
+/** Image source is a `UIImage`. */
+static const GMLImageSourceType MPPTaskImageSourceTypeImage = 0;
+/** Image source is a `CVPixelBuffer`. */
+static const GMLImageSourceType MPPTaskImageSourceTypePixelBuffer = 1;
+/** Image source is a `CMSampleBuffer`. */
+static const GMLImageSourceType MPPTaskImageSourceTypeSampleBuffer = 2;
+
+/** An image used in on-device machine learning using MediaPipe Task library. */
+NS_SWIFT_NAME(MPPTaskImage)
+@interface MPPTaskImage : NSObject
+
+/** Width of the image in pixels. */
+@property(nonatomic, readonly) CGFloat width;
+
+/** Height of the image in pixels. */
+@property(nonatomic, readonly) CGFloat height;
+
+/**
+ * The display orientation of the image. If `imageSourceType` is `MPPTaskImageSourceTypeImage`, the
+ * default value is `image.imageOrientation`; otherwise the default value is `UIImageOrientationUp`.
+ * If the `MPPTaskImage` is being used as input for any MediaPipe vision tasks and is set to any
+ * orientation other than `UIImageOrientationUp`, inference will be performed on a rotated copy of
+ * the image according to the orientation.
+ */
+@property(nonatomic, readonly) UIImageOrientation orientation;
+
+/** The type of the image source. */
+@property(nonatomic, readonly) GMLImageSourceType imageSourceType;
+
+/** The source image. `nil` if `imageSourceType` is not `.image`. */
+@property(nonatomic, readonly, nullable) UIImage *image;
+
+/** The source pixel buffer. `nil` if `imageSourceType` is not `.pixelBuffer`. */
+@property(nonatomic, readonly, nullable) CVPixelBufferRef pixelBuffer;
+
+/** The source sample buffer. `nil` if `imageSourceType` is not `.sampleBuffer`. */
+@property(nonatomic, readonly, nullable) CMSampleBufferRef sampleBuffer;
+
+/**
+ * Initializes an `MPPTaskImage` object with the given `UIImage`.
+ * The orientation of the newly created `MPPTaskImage` will be `UIImageOrientationUp`.
+ * Hence, if this image is used as input for any MediaPipe vision tasks, inference will be performed
+ * on the it without any rotation. To create an `MPPTaskImage` with a different orientation, please
+ * use `[MPPTaskImage initWithImage:orientation:error:]`.
+ *
+ * @param image The image to use as the source. Its `CGImage` property must not be `NULL`.
+ * @param error An optional error parameter populated when there is an error in initializing the
+ * `MPPTaskImage`.
+ *
+ * @return A new `MPPTaskImage` instance with the given image as the source. `nil` if the given
+ * `image` is `nil` or invalid.
+ */
+- (nullable instancetype)initWithUIImage:(UIImage *)image
+                                   error:(NSError **)error NS_DESIGNATED_INITIALIZER;
+
+/**
+ * Initializes an `MPPTaskImage` object with the given `UIImabe` and orientation.
+ *
+ * If the newly created `MPPTaskImage` is used as input for any MediaPipe vision tasks, inference
+ * will be performed on a copy of the image rotated according to the orientation.
+ *
+ * @param image The image to use as the source. Its `CGImage` property must not be `NULL`.
+ * @param orientation The display orientation of the image. This will be stored in the property
+ * `orientation`. `MPPTaskImage`.
+ * @param error An optional error parameter populated when there is an error in initializing the
+ * `MPPTaskImage`.
+ *
+ * @return A new `MPPTaskImage` instance with the given image as the source. `nil` if the given
+ * `image` is `nil` or invalid.
+ */
+- (nullable instancetype)initWithUIImage:(UIImage *)image
+                             orientation:(UIImageOrientation)orientation
+                                   error:(NSError **)error NS_DESIGNATED_INITIALIZER;
+
+/**
+ * Initializes an `MPPTaskImage` object with the given pixel buffer.
+ *
+ * The orientation of the newly created `MPPTaskImage` will be `UIImageOrientationUp`.
+ * Hence, if this image is used as input for any MediaPipe vision tasks, inference will be performed
+ * on the it without any rotation. To create an `MPPTaskImage` with a different orientation, please
+ * use `[MPPTaskImage initWithPixelBuffer:orientation:error:]`.
+ *
+ * @param pixelBuffer The pixel buffer to use as the source. It will be retained by the new
+ *     `MPPTaskImage` instance for the duration of its lifecycle.
+ * @param error An optional error parameter populated when there is an error in initializing the
+ * `MPPTaskImage`.
+ *
+ * @return A new `MPPTaskImage` instance with the given pixel buffer as the source. `nil` if the
+ * given pixel buffer is `nil` or invalid.
+ */
+- (nullable instancetype)initWithPixelBuffer:(CVPixelBufferRef)pixelBuffer
+                                       error:(NSError **)error NS_DESIGNATED_INITIALIZER;
+
+/**
+ * Initializes an `MPPTaskImage` object with the given pixel buffer and orientation.
+ *
+ * If the newly created `MPPTaskImage` is used as input for any MediaPipe vision tasks, inference
+ * will be performed on a copy of the image rotated according to the orientation.
+ *
+ * @param pixelBuffer The pixel buffer to use as the source. It will be retained by the new
+ *     `MPPTaskImage` instance for the duration of its lifecycle.
+ * @param orientation The display orientation of the image.
+ * @param error An optional error parameter populated when there is an error in initializing the
+ * `MPPTaskImage`.
+ *
+ * @return A new `MPPTaskImage` instance with the given orientation and pixel buffer as the source.
+ * `nil` if the given pixel buffer is `nil` or invalid.
+ */
+- (nullable instancetype)initWithPixelBuffer:(CVPixelBufferRef)pixelBuffer
+                                 orientation:(UIImageOrientation)orientation
+    NS_DESIGNATED_INITIALIZER;
+
+/**
+ * Initializes an `MPPTaskImage` object with the given sample buffer.
+ *
+ * The orientation of the newly created `MPPTaskImage` will be `UIImageOrientationUp`.
+ * Hence, if this image is used as input for any MediaPipe vision tasks, inference will be performed
+ * on the it without any rotation. To create an `MPPTaskImage` with a different orientation, please
+ * use `[MPPTaskImage initWithSampleBuffer:orientation:error:]`.
+ *
+ * @param sampleBuffer The sample buffer to use as the source. It will be retained by the new
+ *     `MPPTaskImage` instance for the duration of its lifecycle. The sample buffer must be based on
+ * a pixel buffer (not compressed data). In practice, it should be the video output of the camera on
+ * an iOS device, not other arbitrary types of `CMSampleBuffer`s.
+ * @return A new `MPPTaskImage` instance with the given sample buffer as the source. `nil` if the
+ * given sample buffer is `nil` or invalid.
+ */
+- (nullable instancetype)initWithSampleBuffer:(CMSampleBufferRef)sampleBuffer
+                                        error:(NSError **)error NS_DESIGNATED_INITIALIZER;
+
+/**
+ * Initializes an `MPPTaskImage` object with the given sample buffer and orientation.
+ *
+ * If the newly created `MPPTaskImage` is used as input for any MediaPipe vision tasks, inference
+ * will be performed on a copy of the image rotated according to the orientation.
+ *
+ * @param sampleBuffer The sample buffer to use as the source. It will be retained by the new
+ *     `MPPTaskImage` instance for the duration of its lifecycle. The sample buffer must be based on
+ * a pixel buffer (not compressed data). In practice, it should be the video output of the camera on
+ * an iOS device, not other arbitrary types of `CMSampleBuffer`s.
+ * @param orientation The display orientation of the image.
+ * @return A new `MPPTaskImage` instance with the given orientation and sample buffer as the source.
+ * `nil` if the given sample buffer is `nil` or invalid.
+ */
+- (nullable instancetype)initWithSampleBuffer:(CMSampleBufferRef)sampleBuffer
+                                  orientation:(UIImageOrientation)orientation
+    NS_DESIGNATED_INITIALIZER;
+
+/** Unavailable. */
+- (instancetype)init NS_UNAVAILABLE;
+
++ (instancetype)new NS_UNAVAILABLE;
+
+@end
+
+NS_ASSUME_NONNULL_END

mediapipe/tasks/ios/vision/core/sources/MPPImage.m

@@ -0,0 +1,123 @@
+// Copyright 2023 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.
+
+#import "mediapipe/tasks/ios/vision/core/sources/MPPTaskImage.h"
+#import "mediapipe/tasks/ios/common/utils/sources/MPPCommonUtils.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@implementation MPPTaskImage
+
+- (nullable instancetype)initWithUIImage:(UIImage *)image error:(NSError **)error {
+  return [self initWithUIImage:image orientation:image.orientation error:error];
+}
+
+- (nullable instancetype)initWithUIImage:(UIImage *)image
+                             orientation:(UIImageOrientation)orientation
+                                   error:(NSError **)error {
+  if (image == nil) {
+    [MPPCommonUtils createCustomError:error
+                             withCode:MPPTasksErrorCodeInvalidArgumentError
+                          description:@"Image cannot be nil."];
+  }
+  if (image.CGImage == NULL) {
+    [MPPCommonUtils createCustomError:error
+                             withCode:MPPTasksErrorCodeInvalidArgumentError
+                          description:@"Image does not have a valid underlying CGImage. "
+                                      @"image.CGImage must be non nil."];
+    return nil;
+  }
+
+  self = [super init];
+  if (self) {
+    _imageSourceType = MPPTaskImageSourceTypeImage;
+    _orientation = orientation;
+    _image = image;
+    _width = image.size.width * image.scale;
+    _height = image.size.height * image.scale;
+  }
+  return self;
+}
+
+- (nullable instancetype)initWithPixelBuffer:(CVPixelBufferRef)pixelBuffer error:(NSError **)error {
+  return [self initWithPixelBuffer:pixelBuffer orientation:UIImageOrientationUp error:error];
+}
+
+- (nullable instancetype)initWithPixelBuffer:(CVPixelBufferRef)pixelBuffer
+                                 orientation:(UIImageOrientation)orientation
+                                       error:(NSError **)error {
+  if (pixelBuffer == NULL) {
+    [MPPCommonUtils createCustomError:error
+                             withCode:MPPTasksErrorCodeInvalidArgumentError
+                          description:@"Pixel Buffer cannot be nil."];
+    return nil;
+  }
+
+  self = [super init];
+  if (self != nil) {
+    _imageSourceType = MPPTaskImageSourceTypePixelBuffer;
+    _orientation = orientation;
+    CVPixelBufferRetain(pixelBuffer);
+    _pixelBuffer = pixelBuffer;
+    _width = CVPixelBufferGetWidth(pixelBuffer);
+    _height = CVPixelBufferGetHeight(pixelBuffer);
+  }
+  return self;
+}
+
+- (nullable instancetype)initWithSampleBuffer:(CMSampleBufferRef)sampleBuffer
+                                        error:(NSError **)error {
+  return [self initWithSampleBuffer:sampleBuffer orientation:UIImageOrientation error:error];
+}
+
+- (nullable instancetype)initWithSampleBuffer:(CMSampleBufferRef)sampleBuffer
+                                  orientation:(UIImageOrientation)orientation
+                                        error:(NSError **)error {
+  if (!CMSampleBufferIsValid(sampleBuffer)) {
+    [MPPCommonUtils createCustomError:error
+                             withCode:MPPTasksErrorCodeInvalidArgumentError
+                          description:@"Sample buffer is not valid. Invoking "
+                                      @"CMSampleBufferIsValid(sampleBuffer) must return true."];
+    return nil;
+  }
+
+  CVImageBufferRef imageBuffer = CMSampleBufferGetImageBuffer(sampleBuffer);
+  if (imageBuffer == NULL) {
+    return nil;
+  }
+
+  self = [super init];
+  if (self != nil) {
+    _imageSourceType = MPPTaskImageSourceTypeSampleBuffer;
+    _orientation = orientation;
+    CFRetain(sampleBuffer);
+    _sampleBuffer = sampleBuffer;
+    _width = CVPixelBufferGetWidth(imageBuffer);
+    _height = CVPixelBufferGetHeight(imageBuffer);
+  }
+  return self;
+}
+
+- (void)dealloc {
+  if (_sampleBuffer != NULL) {
+    CFRelease(_sampleBuffer);
+  }
+  if (_pixelBuffer != NULL) {
+    CVPixelBufferRelease(_pixelBuffer);
+  }
+}
+
+@end
+
+NS_ASSUME_NONNULL_END