Added MPPGestureRecognizerResultHelpers

This commit is contained in:
Prianka Liz Kariat 2023-05-17 21:52:05 +05:30
parent ebd1545506
commit 501b4bbc7b
3 changed files with 187 additions and 0 deletions

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@ -31,3 +31,16 @@ objc_library(
],
)
objc_library(
name = "MPPGestureRecognizerResultHelpers",
srcs = ["sources/MPPGestureRecognizerResult+Helpers.mm"],
hdrs = ["sources/MPPGestureRecognizerResult+Helpers.h"],
deps = [
"//mediapipe/framework:packet",
"//mediapipe/framework/formats:classification_cc_proto",
"//mediapipe/framework/formats:landmark_cc_proto",
"//mediapipe/tasks/ios/components/containers/utils:MPPCategoryHelpers",
"//mediapipe/tasks/ios/components/containers/utils:MPPLandmarkHelpers",
"//mediapipe/tasks/ios/vision/gesture_recognizer:MPPGestureRecognizerResult",
],
)

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@ -0,0 +1,46 @@
// 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/gesture_recognizer/sources/MPPGestureRecognizerResult.h"
#include "mediapipe/framework/packet.h"
NS_ASSUME_NONNULL_BEGIN
static const int kMicroSecondsPerMilliSecond = 1000;
@interface MPPGestureRecognizerResult (Helpers)
/**
* Creates an `MPPGestureRecognizerResult` from hand gestures, handedness, hand landmarks and world
* landmarks packets.
*
* @param handGesturesPacket a MediaPipe packet wrapping a`std::vector<ClassificationListProto>`.
* @param handednessPacket a MediaPipe packet wrapping a`std::vector<ClassificationListProto>`.
* @param handLandmarksPacket a MediaPipe packet wrapping
* a`std::vector<NormalizedlandmarkListProto>`.
* @param handLandmarksPacket a MediaPipe packet wrapping a`std::vector<LandmarkListProto>`.
*
* @return An `MPPGestureRecognizerResult` object that contains the hand gesture recognition
* results.
*/
+ (MPPGestureRecognizerResult *)
gestureRecognizerResultWithHandGesturesPacket:(const mediapipe::Packet &)handGesturesPacket
handednessPacket:(const mediapipe::Packet &)handednessPacket
handLandmarksPacket:(const mediapipe::Packet &)handLandmarksPacket
worldLandmarksPacket:(const mediapipe::Packet &)worldLandmarksPacket;
@end
NS_ASSUME_NONNULL_END

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@ -0,0 +1,128 @@
// 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/gesture_recognizer/utils/sources/MPPGestureRecognizerResult+Helpers.h"
#import "mediapipe/tasks/ios/components/containers/utils/sources/MPPCategory+Helpers.h"
#import "mediapipe/tasks/ios/components/containers/utils/sources/MPPLandmark+Helpers.h"
#include "mediapipe/framework/formats/classification.pb.h"
#include "mediapipe/framework/formats/landmark.pb.h"
#include "mediapipe/framework/packet.h"
namespace {
using ClassificationListProto = ::mediapipe::ClassificationList;
using LandmarkListProto = ::mediapipe::LandmarkList;
using NormalizedLandmarkListProto = ::mediapipe::NormalizedLandmarkList;
using ::mediapipe::Packet;
} // namespace
@implementation MPPGestureRecognizerResult (Helpers)
+ (MPPGestureRecognizerResult *)
gestureRecognizerResultWithHandGesturesPacket:(const Packet &)handGesturesPacket
handednessPacket:(const Packet &)handednessPacket
handLandmarksPacket:(const Packet &)handLandmarksPacket
worldLandmarksPacket:(const Packet &)worldLandmarksPacket {
NSInteger timestampInMilliseconds =
(NSInteger)(handGesturesPacket.Timestamp().Value() / kMicroSecondsPerMilliSecond);
if (handGesturesPacket.IsEmpty()) {
return [[MPPGestureRecognizerResult alloc] initWithGestures:@[]
handedness:@[]
landmarks:@[]
worldLandmarks:@[]
timestampInMilliseconds:timestampInMilliseconds];
}
if (!handGesturesPacket.ValidateAsType<std::vector<ClassificationListProto>>().ok() ||
!handednessPacket.ValidateAsType<std::vector<ClassificationListProto>>().ok() ||
!handLandmarksPacket.ValidateAsType<std::vector<NormalizedLandmarkListProto>>().ok() ||
!worldLandmarksPacket.ValidateAsType<std::vector<LandmarkListProto>>().ok()) {
return nil;
}
const std::vector<ClassificationListProto> &handGesturesClassificationListProtos =
handGesturesPacket.Get<std::vector<ClassificationListProto>>();
NSMutableArray<NSMutableArray<MPPCategory *> *> *multiHandGestures =
[NSMutableArray arrayWithCapacity:(NSUInteger)handGesturesClassificationListProtos.size()];
for (const auto &classificationListProto : handGesturesClassificationListProtos) {
NSMutableArray<MPPCategory *> *gestures = [NSMutableArray
arrayWithCapacity:(NSUInteger)classificationListProto.classification().size()];
for (const auto &classificationProto : classificationListProto.classification()) {
MPPCategory *category = [MPPCategory categoryWithProto:classificationProto];
[gestures addObject:category];
}
[multiHandGestures addObject:[gestures copy]];
}
const std::vector<ClassificationListProto> &handednessClassificationListProtos =
handednessPacket.Get<std::vector<ClassificationListProto>>();
NSMutableArray<NSMutableArray<MPPCategory *> *> *multiHandHandedness =
[NSMutableArray arrayWithCapacity:(NSUInteger)handednessClassificationListProtos.size()];
for (const auto &classificationListProto : handednessClassificationListProtos) {
NSMutableArray<MPPCategory *> *handedness = [NSMutableArray
arrayWithCapacity:(NSUInteger)classificationListProto.classification().size()];
for (const auto &classificationProto : classificationListProto.classification()) {
MPPCategory *category = [MPPCategory categoryWithProto:classificationProto];
[handedness addObject:category];
}
[multiHandHandedness addObject:[handedness copy]];
}
const std::vector<NormalizedLandmarkListProto> &handLandmarkListProtos =
handLandmarksPacket.Get<std::vector<NormalizedLandmarkListProto>>();
NSMutableArray<NSMutableArray<MPPNormalizedLandmark *> *> *multiHandLandmarks =
[NSMutableArray arrayWithCapacity:(NSUInteger)handLandmarkListProtos.size()];
for (const auto &handLandmarkListProto : handLandmarkListProtos) {
NSMutableArray<MPPNormalizedLandmark *> *handLandmarks =
[NSMutableArray arrayWithCapacity:(NSUInteger)handLandmarkListProto.landmark().size()];
for (const auto &normalizedLandmarkProto : handLandmarkListProto.landmark()) {
MPPNormalizedLandmark *normalizedLandmark =
[MPPNormalizedLandmark normalizedLandmarkWithProto:normalizedLandmarkProto];
[handLandmarks addObject:normalizedLandmark];
}
[multiHandLandmarks addObject:[handLandmarks copy]];
}
const std::vector<LandmarkListProto> &worldLandmarkListProtos =
worldLandmarksPacket.Get<std::vector<LandmarkListProto>>();
NSMutableArray<NSMutableArray<MPPLandmark *> *> *multiHandWorldLandmarks =
[NSMutableArray arrayWithCapacity:(NSUInteger)worldLandmarkListProtos.size()];
for (const auto &worldLandmarkListProto : worldLandmarkListProtos) {
NSMutableArray<MPPLandmark *> *worldLandmarks =
[NSMutableArray arrayWithCapacity:(NSUInteger)worldLandmarkListProto.landmark().size()];
for (const auto &landmarkProto : worldLandmarkListProto.landmark()) {
MPPLandmark *landmark =
[MPPLandmark landmarkWithProto:landmarkProto];
[worldLandmarks addObject:landmark];
}
[multiHandWorldLandmarks addObject:[worldLandmarks copy]];
}
MPPGestureRecognizerResult *gestureRecognizerResult =
[[MPPGestureRecognizerResult alloc] initWithGestures:[multiHandGestures copy]
handedness:[multiHandHandedness copy]
landmarks:[multiHandLandmarks copy]
worldLandmarks:[multiHandWorldLandmarks copy]
timestampInMilliseconds:timestampInMilliseconds];
return gestureRecognizerResult;
}
@end