Added pose landmarker result helpers

mediapipe/tasks/ios/vision/pose_landmarker/sources/MPPPoseLandmarkerResult.h

@@ -46,7 +46,7 @@ NS_SWIFT_NAME(PoseLandmarkerResult)
  */
 - (instancetype)initWithLandmarks:(NSArray<NSArray<MPPNormalizedLandmark *> *> *)landmarks
                    worldLandmarks:(NSArray<NSArray<MPPLandmark *> *> *)worldLandmarks
-                segmentationMasks:(NSArray<MPPMask *> *)segmentationMasks
+                segmentationMasks:(nullable NSArray<MPPMask *> *)segmentationMasks
           timestampInMilliseconds:(NSInteger)timestampInMilliseconds NS_DESIGNATED_INITIALIZER;
 
 - (instancetype)initWithTimestampInMilliseconds:(NSInteger)timestampInMilliseconds NS_UNAVAILABLE;

mediapipe/tasks/ios/vision/pose_landmarker/utils/BUILD

@@ -36,3 +36,20 @@ objc_library(
         "//mediapipe/tasks/ios/vision/pose_landmarker:MPPPoseLandmarkerOptions",
     ],
 )
+objc_library(
+    name = "MPPPoseLandmarkerResultHelpers",
+    srcs = ["sources/MPPPoseLandmarkerResult+Helpers.mm"],
+    hdrs = ["sources/MPPPoseLandmarkerResult+Helpers.h"],
+    copts = [
+        "-ObjC++",
+        "-std=c++17",
+        "-x objective-c++",
+    ],
+    deps = [
+        "//mediapipe/framework:packet",
+        "//mediapipe/framework/formats:image",
+        "//mediapipe/framework/formats:landmark_cc_proto",
+        "//mediapipe/tasks/ios/components/containers/utils:MPPLandmarkHelpers",
+        "//mediapipe/tasks/ios/vision/pose_landmarker:MPPPoseLandmarkerResult",
+    ],
+)

mediapipe/tasks/ios/vision/pose_landmarker/utils/sources/MPPPoseLandmarkerResult+Helpers.h

@@ -0,0 +1,65 @@
+// 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/pose_landmarker/sources/MPPPoseLandmarkerResult.h"
+
+#include "mediapipe/framework/formats/image.h"
+#include "mediapipe/framework/formats/landmark.pb.h"
+#include "mediapipe/framework/packet.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+static const int kMicroSecondsPerMilliSecond = 1000;
+
+@interface MPPPoseLandmarkerResult (Helpers)
+
+/**
+ * Creates an `MPPPoseLandmarkerResult` from landmarks, world landmarks and segmentation mask
+ * packets.
+ *
+ * @param landmarksPacket A MediaPipe packet wrapping a `std::vector<NormalizedlandmarkListProto>`.
+ * @param worldLandmarksPacket A MediaPipe packet wrapping a `std::vector<LandmarkListProto>`.
+ * @param segmentationMasksPacket a MediaPipe packet wrapping a `std::vector<Image>`.
+ *
+ * @return  An `MPPPoseLandmarkerResult` object that contains the hand landmark detection
+ * results.
+ */
++ (MPPPoseLandmarkerResult *)
+    poseLandmarkerResultWithLandmarksPacket:(const mediapipe::Packet &)landmarksPacket
+                       worldLandmarksPacket:(const mediapipe::Packet &)worldLandmarksPacket
+                    segmentationMasksPacket:(const mediapipe::Packet *)segmentationMasksPacket;
+
+/**
+ * Creates an `MPPPoseLandmarkerResult` from landmarks, world landmarks and segmentation mask
+ * images.
+ *
+ * @param landmarksProto A vector of protos of type `std::vector<NormalizedlandmarkListProto>`.
+ * @param worldLandmarksPacket A vector of protos of type `std::vector<LandmarkListProto>`.
+ * @param segmentationMasks A vector of type `std::vector<Image>`.
+ * @param timestampInMilliSeconds The timestamp of the Packet that contained the result.
+ *
+ * @return  An `MPPPoseLandmarkerResult` object that contains the pose landmark detection
+ * results.
+ */
++ (MPPPoseLandmarkerResult *)
+    poseLandmarkerResultWithLandmarksProto:
+        (const std::vector<mediapipe::NormalizedLandmarkList> &)landmarksProto
+                       worldLandmarksProto:
+                           (const std::vector<mediapipe::LandmarkList> &)worldLandmarksProto
+                         segmentationMasks:(const std::vector<mediapipe::Image> *)segmentationMasks
+                   timestampInMilliSeconds:(NSInteger)timestampInMilliseconds;
+
+@end
+
+NS_ASSUME_NONNULL_END

mediapipe/tasks/ios/vision/pose_landmarker/utils/sources/MPPPoseLandmarkerResult+Helpers.mm

@@ -0,0 +1,122 @@
+// 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/pose_landmarker/utils/sources/MPPPoseLandmarkerResult+Helpers.h"
+
+#import "mediapipe/tasks/ios/components/containers/utils/sources/MPPLandmark+Helpers.h"
+
+namespace {
+using LandmarkListProto = ::mediapipe::LandmarkList;
+using NormalizedLandmarkListProto = ::mediapipe::NormalizedLandmarkList;
+using ::mediapipe::Image;
+using ::mediapipe::Packet;
+}  // namespace
+
+@implementation MPPPoseLandmarkerResult (Helpers)
+
++ (MPPPoseLandmarkerResult *)emptyPoseLandmarkerResultWithTimestampInMilliseconds:
+    (NSInteger)timestampInMilliseconds {
+  return [[MPPPoseLandmarkerResult alloc] initWithLandmarks:@[]
+                                             worldLandmarks:@[]
+                                          segmentationMasks:@[]
+                                    timestampInMilliseconds:timestampInMilliseconds];
+}
+
++ (MPPPoseLandmarkerResult *)
+    poseLandmarkerResultWithLandmarksProto:
+        (const std::vector<NormalizedLandmarkListProto> &)landmarksProto
+                       worldLandmarksProto:
+                           (const std::vector<LandmarkListProto> &)worldLandmarksProto
+                         segmentationMasks:(const std::vector<Image> *)segmentationMasks
+                   timestampInMilliSeconds:(NSInteger)timestampInMilliseconds {
+  NSMutableArray<NSMutableArray<MPPNormalizedLandmark *> *> *multiplePoseLandmarks =
+      [NSMutableArray arrayWithCapacity:(NSUInteger)landmarksProto.size()];
+
+  for (const auto &landmarkListProto : landmarksProto) {
+    NSMutableArray<MPPNormalizedLandmark *> *landmarks =
+        [NSMutableArray arrayWithCapacity:(NSUInteger)landmarkListProto.landmark().size()];
+    for (const auto &normalizedLandmarkProto : landmarkListProto.landmark()) {
+      MPPNormalizedLandmark *normalizedLandmark =
+          [MPPNormalizedLandmark normalizedLandmarkWithProto:normalizedLandmarkProto];
+      [landmarks addObject:normalizedLandmark];
+    }
+    [multiplePoseLandmarks addObject:landmarks];
+  }
+
+  NSMutableArray<NSMutableArray<MPPLandmark *> *> *multiplePoseWorldLandmarks =
+      [NSMutableArray arrayWithCapacity:(NSUInteger)worldLandmarksProto.size()];
+
+  for (const auto &worldLandmarkListProto : worldLandmarksProto) {
+    NSMutableArray<MPPLandmark *> *worldLandmarks =
+        [NSMutableArray arrayWithCapacity:(NSUInteger)worldLandmarkListProto.landmark().size()];
+    for (const auto &landmarkProto : worldLandmarkListProto.landmark()) {
+      MPPLandmark *landmark = [MPPLandmark landmarkWithProto:landmarkProto];
+      [worldLandmarks addObject:landmark];
+    }
+    [multiplePoseWorldLandmarks addObject:worldLandmarks];
+  }
+
+  NSMutableArray<MPPMask *> *confidenceMasks =
+      [NSMutableArray arrayWithCapacity:(NSUInteger)segmentationMasks->size()];
+
+  for (const auto &segmentationMask : *segmentationMasks) {
+    [confidenceMasks addObject:[[MPPMask alloc] initWithFloat32Data:(float *)segmentationMask
+                                                                        .GetImageFrameSharedPtr()
+                                                                        .get()
+                                                                        ->PixelData()
+                                                              width:segmentationMask.width()
+                                                             height:segmentationMask.height()
+                                                         /** Always deep copy */
+                                                         shouldCopy:YES]];
+  }
+
+  MPPPoseLandmarkerResult *poseLandmarkerResult =
+      [[MPPPoseLandmarkerResult alloc] initWithLandmarks:multiplePoseLandmarks
+                                          worldLandmarks:multiplePoseWorldLandmarks
+                                       segmentationMasks:confidenceMasks
+                                 timestampInMilliseconds:timestampInMilliseconds];
+  return poseLandmarkerResult;
+}
+
++ (MPPPoseLandmarkerResult *)
+    poseLandmarkerResultWithLandmarksPacket:(const Packet &)landmarksPacket
+                       worldLandmarksPacket:(const Packet &)worldLandmarksPacket
+                    segmentationMasksPacket:(const Packet *)segmentationMasksPacket {
+  NSInteger timestampInMilliseconds =
+      (NSInteger)(landmarksPacket.Timestamp().Value() / kMicroSecondsPerMilliSecond);
+
+  if (landmarksPacket.IsEmpty()) {
+    return [MPPPoseLandmarkerResult
+        emptyPoseLandmarkerResultWithTimestampInMilliseconds:timestampInMilliseconds];
+  }
+
+  if (!landmarksPacket.ValidateAsType<std::vector<NormalizedLandmarkListProto>>().ok() ||
+      !worldLandmarksPacket.ValidateAsType<std::vector<LandmarkListProto>>().ok()) {
+    return [MPPPoseLandmarkerResult
+        emptyPoseLandmarkerResultWithTimestampInMilliseconds:timestampInMilliseconds];
+  }
+
+  const std::vector<Image> *segmentationMasks =
+      segmentationMasksPacket ? &(segmentationMasksPacket->Get<std::vector<Image>>()) : nullptr;
+
+  return [MPPPoseLandmarkerResult
+      poseLandmarkerResultWithLandmarksProto:landmarksPacket
+                                                 .Get<std::vector<NormalizedLandmarkListProto>>()
+                         worldLandmarksProto:worldLandmarksPacket
+                                                 .Get<std::vector<LandmarkListProto>>()
+                           segmentationMasks:segmentationMasks
+                     timestampInMilliSeconds:timestampInMilliseconds];
+}
+
+@end