Added MPPGestureRecognizer header

This commit is contained in:
Prianka Liz Kariat 2023-05-17 21:53:25 +05:30
parent 501b4bbc7b
commit dcb0414d4b
2 changed files with 293 additions and 0 deletions

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@ -38,3 +38,22 @@ objc_library(
"//mediapipe/tasks/ios/vision/core:MPPRunningMode", "//mediapipe/tasks/ios/vision/core:MPPRunningMode",
], ],
) )
objc_library(
name = "MPPGestureRecognizer",
srcs = ["sources/MPPGestureRecognizer.mm"],
hdrs = ["sources/MPPGestureRecognizer.h"],
copts = [
"-ObjC++",
"-std=c++17",
"-x objective-c++",
],
module_name = "MPPGestureRecognizer",
deps = [
":MPPGestureRecognizerOptions",
":MPPGestureRecognizerResult",
"//mediapipe/tasks/ios/core:MPPTaskOptions",
"//mediapipe/tasks/ios/vision/core:MPPImage",
],
)

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@ -0,0 +1,274 @@
// 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 <Foundation/Foundation.h>
#import "mediapipe/tasks/ios/core/sources/MPPTaskOptions.h"
#import "mediapipe/tasks/ios/vision/core/sources/MPPImage.h"
#import "mediapipe/tasks/ios/vision/gesture_recognizer/sources/MPPGestureRecognizerOptions.h"
#import "mediapipe/tasks/ios/vision/gesture_recognizer/sources/MPPGestureRecognizerResult.h"
NS_ASSUME_NONNULL_BEGIN
/**
* @brief Performs gesture recognition on images.
*
* This API expects a pre-trained TFLite hand gesture recognizer model or a custom one created using
* MediaPipe Solutions Model Maker. See
* https://developers.google.com/mediapipe/solutions/model_maker.
*/
NS_SWIFT_NAME(GestureRecognizer)
@interface MPPGestureRecognizer : NSObject
/**
* Creates a new instance of `MPPGestureRecognizer` from an absolute path to a TensorFlow Lite model
* file stored locally on the device and the default `MPPGestureRecognizerOptions`.
*
* @param modelPath An absolute path to a TensorFlow Lite model file stored locally on the device.
* @param error An optional error parameter populated when there is an error in initializing the
* gesture recognizer.
*
* @return A new instance of `MPPGestureRecognizer` with the given model path. `nil` if there is an
* error in initializing the gesture recognizer.
*/
- (nullable instancetype)initWithModelPath:(NSString *)modelPath error:(NSError **)error;
/**
* Creates a new instance of `MPPGestureRecognizer` from the given `MPPGestureRecognizerOptions`.
*
* @param options The options of type `MPPGestureRecognizerOptions` to use for configuring the
* `MPPGestureRecognizer`.
* @param error An optional error parameter populated when there is an error in initializing the
* gesture recognizer.
*
* @return A new instance of `MPPGestureRecognizer` with the given options. `nil` if there is an
* error in initializing the gesture recognizer.
*/
- (nullable instancetype)initWithOptions:(MPPGestureRecognizerOptions *)options
error:(NSError **)error NS_DESIGNATED_INITIALIZER;
/**
* Performs gesture recognition on the provided MPPImage using the whole image as region of
* interest. Rotation will be applied according to the `orientation` property of the provided
* `MPPImage`. Only use this method when the `MPPGestureRecognizer` is created with
* `MPPRunningModeImage`.
* This method supports gesture recognition of RGBA images. If your `MPPImage` has a source type of
* `MPPImageSourceTypePixelBuffer` or `MPPImageSourceTypeSampleBuffer`, the underlying pixel buffer
* must have one of the following pixel format types:
* 1. kCVPixelFormatType_32BGRA
* 2. kCVPixelFormatType_32RGBA
*
* If your `MPPImage` has a source type of `MPPImageSourceTypeImage` ensure that the color space is
* RGB with an Alpha channel.
*
* @param image The `MPPImage` on which gesture recognition is to be performed.
* @param error An optional error parameter populated when there is an error in performing gesture
* recognition on the input image.
*
* @return An `MPPGestureRecognizerResult` object that contains the hand gesture recognition
* results.
*/
- (nullable MPPGestureRecognizerResult *)recognizeImage:(MPPImage *)image
error:(NSError **)error
NS_SWIFT_NAME(recognize(image:));
/**
* Performs gesture recognition on the provided `MPPImage` cropped to the specified region of
* interest. Rotation will be applied on the cropped image according to the `orientation` property
* of the provided `MPPImage`. Only use this method when the `MPPGestureRecognizer` is created with
* `MPPRunningModeImage`.
*
* This method supports gesture recognition of RGBA images. If your `MPPImage` has a source type of
* `MPPImageSourceTypePixelBuffer` or `MPPImageSourceTypeSampleBuffer`, the underlying pixel buffer
* must have one of the following pixel format types:
* 1. kCVPixelFormatType_32BGRA
* 2. kCVPixelFormatType_32RGBA
*
* If your `MPPImage` has a source type of `MPPImageSourceTypeImage` ensure that the color space is
* RGB with an Alpha channel.
*
* @param image The `MPPImage` on which gesture recognition is to be performed.
* @param roi A `CGRect` specifying the region of interest within the given `MPPImage`, on which
* gesture recognition should be performed.
* @param error An optional error parameter populated when there is an error in performing gesture
* recognition on the input image.
*
* @return An `MPPGestureRecognizerResult` object that contains the hand gesture recognition
* results.
*/
- (nullable MPPGestureRecognizerResult *)recognizeImage:(MPPImage *)image
regionOfInterest:(CGRect)roi
error:(NSError **)error
NS_SWIFT_NAME(recognize(image:regionOfInterest:));
/**
* Performs gesture recognition on the provided video frame of type `MPPImage` using the whole
* image as region of interest. Rotation will be applied according to the `orientation` property of
* the provided `MPPImage`. Only use this method when the `MPPGestureRecognizer` is created with
* `MPPRunningModeVideo`.
*
* It's required to provide the video frame's timestamp (in milliseconds). The input timestamps must
* be monotonically increasing.
*
* This method supports gesture recognition of RGBA images. If your `MPPImage` has a source type of
* `MPPImageSourceTypePixelBuffer` or `MPPImageSourceTypeSampleBuffer`, the underlying pixel buffer
* must have one of the following pixel format types:
* 1. kCVPixelFormatType_32BGRA
* 2. kCVPixelFormatType_32RGBA
*
* If your `MPPImage` has a source type of `MPPImageSourceTypeImage` ensure that the color space is
* RGB with an Alpha channel.
*
* @param image The `MPPImage` on which gesture recognition is to be performed.
* @param timestampInMilliseconds The video frame's timestamp (in milliseconds). The input
* timestamps must be monotonically increasing.
* @param error An optional error parameter populated when there is an error in performing gesture
* recognition on the input video frame.
*
* @return An `MPPGestureRecognizerResult` object that contains the hand gesture recognition
* results.
*/
- (nullable MPPGestureRecognizerResult *)recognizeVideoFrame:(MPPImage *)image
timestampInMilliseconds:(NSInteger)timestampInMilliseconds
error:(NSError **)error
NS_SWIFT_NAME(recognize(videoFrame:timestampInMilliseconds:));
/**
* Performs gesture recognition on the provided video frame of type `MPPImage` cropped to the
* specified region of interest. Rotation will be applied according to the `orientation` property of
* the provided `MPPImage`. Only use this method when the `MPPGestureRecognizer` is created with
* `MPPRunningModeVideo`.
*
* It's required to provide the video frame's timestamp (in milliseconds). The input timestamps must
* be monotonically increasing.
*
* This method supports gesture recognition of RGBA images. If your `MPPImage` has a source type of
* `MPPImageSourceTypePixelBuffer` or `MPPImageSourceTypeSampleBuffer`, the underlying pixel buffer
* must have one of the following pixel format types:
* 1. kCVPixelFormatType_32BGRA
* 2. kCVPixelFormatType_32RGBA
*
* If your `MPPImage` has a source type of `MPPImageSourceTypeImage` ensure that the color space is
* RGB with an Alpha channel.
*
* @param image A live stream image data of type `MPPImage` on which gesture recognition is to be
* performed.
* @param timestampInMilliseconds The video frame's timestamp (in milliseconds). The input
* timestamps must be monotonically increasing.
* @param roi A `CGRect` specifying the region of interest within the video frame of type
* `MPPImage`, on which gesture recognition should be performed.
* @param error An optional error parameter populated when there is an error in performing gesture
* recognition on the input video frame.
*
* @return An `MPPGestureRecognizerResult` object that contains the hand gesture recognition
* results.
*/
- (nullable MPPGestureRecognizerResult *)recognizeVideoFrame:(MPPImage *)image
timestampInMilliseconds:(NSInteger)timestampInMilliseconds
regionOfInterest:(CGRect)roi
error:(NSError **)error
NS_SWIFT_NAME(recognize(videoFrame:timestampInMilliseconds:regionOfInterest:));
/**
* Sends live stream image data of type `MPPImage` to perform gesture recognition using the whole
* image as region of interest. Rotation will be applied according to the `orientation` property of
* the provided `MPPImage`. Only use this method when the `MPPGestureRecognizer` is created with
* `MPPRunningModeLiveStream`.
*
* The object which needs to be continuously notified of the available results of gesture
* recognition must confirm to `MPPGestureRecognizerLiveStreamDelegate` protocol and implement the
* `gestureRecognizer:didFinishRecognitionWithResult:timestampInMilliseconds:error:`
* delegate method.
*
* It's required to provide a timestamp (in milliseconds) to indicate when the input image is sent
* to the gesture recognizer. The input timestamps must be monotonically increasing.
*
* This method supports gesture recognition of RGBA images. If your `MPPImage` has a source type of
* `MPPImageSourceTypePixelBuffer` or `MPPImageSourceTypeSampleBuffer`, the underlying pixel buffer
* must have one of the following pixel format types:
* 1. kCVPixelFormatType_32BGRA
* 2. kCVPixelFormatType_32RGBA
*
* If the input `MPPImage` has a source type of `MPPImageSourceTypeImage` ensure that the color
* space is RGB with an Alpha channel.
*
* If this method is used for performing gesture recognition on live camera frames using
* `AVFoundation`, ensure that you request `AVCaptureVideoDataOutput` to output frames in
* `kCMPixelFormat_32RGBA` using its `videoSettings` property.
*
* @param image A live stream image data of type `MPPImage` on which gesture recognition is to be
* performed.
* @param timestampInMilliseconds The timestamp (in milliseconds) which indicates when the input
* image is sent to the gesture recognizer. The input timestamps must be monotonically increasing.
* @param error An optional error parameter populated when there is an error in performing gesture
* recognition on the input live stream image data.
*
* @return `YES` if the image was sent to the task successfully, otherwise `NO`.
*/
- (BOOL)recognizeAsyncImage:(MPPImage *)image
timestampInMilliseconds:(NSInteger)timestampInMilliseconds
error:(NSError **)error
NS_SWIFT_NAME(recognizeAsync(image:timestampInMilliseconds:));
/**
* Sends live stream image data of type `MPPImage` to perform gesture recognition, cropped to the
* specified region of interest.. Rotation will be applied according to the `orientation` property
* of the provided `MPPImage`. Only use this method when the `MPPGestureRecognizer` is created with
* `MPPRunningModeLiveStream`.
*
* The object which needs to be continuously notified of the available results of gesture
* recognition must confirm to `MPPGestureRecognizerLiveStreamDelegate` protocol and implement the
* `gestureRecognizer:didFinishRecognitionWithResult:timestampInMilliseconds:error:` delegate
* method.
*
* It's required to provide a timestamp (in milliseconds) to indicate when the input image is sent
* to the gesture recognizer. The input timestamps must be monotonically increasing.
*
* This method supports gesture recognition of RGBA images. If your `MPPImage` has a source type of
* `MPPImageSourceTypePixelBuffer` or `MPPImageSourceTypeSampleBuffer`, the underlying pixel buffer
* must have one of the following pixel format types:
* 1. kCVPixelFormatType_32BGRA
* 2. kCVPixelFormatType_32RGBA
*
* If the input `MPPImage` has a source type of `MPPImageSourceTypeImage` ensure that the color
* space is RGB with an Alpha channel.
*
* If this method is used for preforming gesture recognition on live camera frames using
* `AVFoundation`, ensure that you request `AVCaptureVideoDataOutput` to output frames in
* `kCMPixelFormat_32RGBA` using its `videoSettings` property.
*
* @param image A live stream image data of type `MPPImage` on which gesture recognition is to be
* performed.
* @param timestampInMilliseconds The timestamp (in milliseconds) which indicates when the input
* image is sent to the gesture recognizer. The input timestamps must be monotonically increasing.
* @param roi A `CGRect` specifying the region of interest within the given live stream image data
* of type `MPPImage`, on which gesture recognition should be performed.
* @param error An optional error parameter populated when there is an error in performing gesture
* recognition on the input live stream image data.
*
* @return `YES` if the image was sent to the task successfully, otherwise `NO`.
*/
- (BOOL)recognizeAsyncImage:(MPPImage *)image
timestampInMilliseconds:(NSInteger)timestampInMilliseconds
regionOfInterest:(CGRect)roi
error:(NSError **)error
NS_SWIFT_NAME(recognizeAsync(image:timestampInMilliseconds:regionOfInterest:));
- (instancetype)init NS_UNAVAILABLE;
+ (instancetype)new NS_UNAVAILABLE;
@end
NS_ASSUME_NONNULL_END