Added iOS gesture recognizer result helpers for tests

mediapipe/tasks/ios/test/vision/gesture_recognizer/utils/BUILD

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+package(default_visibility = ["//mediapipe/tasks:internal"])
+
+licenses(["notice"])
+
+objc_library(
+    name = "MPPGestureRecognizerResultProtoHelpers",
+    srcs = ["sources/MPPGestureRecognizerResult+ProtoHelpers.mm"],
+    hdrs = ["sources/MPPGestureRecognizerResult+ProtoHelpers.h"],
+    copts = [
+        "-ObjC++",
+        "-std=c++17",
+        "-x objective-c++",
+    ],
+    deps = [
+        "//mediapipe/tasks/ios/test/vision/utils:parse_proto_utils",
+        "//mediapipe/framework/formats:classification_cc_proto",
+        "//mediapipe/tasks/cc/components/containers/proto:landmarks_detection_result_cc_proto",
+        "//mediapipe/tasks/ios/vision/gesture_recognizer/utils:MPPGestureRecognizerResultHelpers",
+        "//mediapipe/tasks/ios/common/utils:NSStringHelpers",
+    ],
+)

mediapipe/tasks/ios/test/vision/gesture_recognizer/utils/sources/MPPGestureRecognizerResult+ProtoHelpers.h

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+// Copyright 2022 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/vision/gesture_recognizer/sources/MPPGestureRecognizerResult.h"
+
+NS_ASSUME_NONNULL_BEGIN
+@interface MPPGestureRecognizerResult (ProtoHelpers)
+
++ (MPPGestureRecognizerResult *)
+    gestureRecognizerResultsFromProtobufFileWithName:(NSString *)fileName
+                                        gestureLabel:(NSString *)gestureLabel;
+@end
+
+NS_ASSUME_NONNULL_END

mediapipe/tasks/ios/test/vision/gesture_recognizer/utils/sources/MPPGestureRecognizerResult+ProtoHelpers.mm

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+// 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/test/vision/gesture_recognizer/utils/sources/MPPGestureRecognizerResult+ProtoHelpers.h"
+
+#import "mediapipe/tasks/ios/common/utils/sources/NSString+Helpers.h"
+#import "mediapipe/tasks/ios/vision/gesture_recognizer/utils/sources/MPPGestureRecognizerResult+Helpers.h"
+
+#include "mediapipe/framework/formats/classification.pb.h"
+#include "mediapipe/tasks/cc/components/containers/proto/landmarks_detection_result.pb.h"
+#include "mediapipe/tasks/ios/test/vision/utils/sources/parse_proto_utils.h"
+
+namespace {
+using ClassificationListProto = ::mediapipe::ClassificationList;
+using ClassificationProto = ::mediapipe::Classification;
+using LandmarksDetectionResultProto =
+    ::mediapipe::tasks::containers::proto::LandmarksDetectionResult;
+using ::mediapipe::tasks::ios::test::vision::utils::get_proto_from_pbtxt;
+}  // namespace
+
+@implementation MPPGestureRecognizerResult (ProtoHelpers)
+
++ (MPPGestureRecognizerResult *)
+    gestureRecognizerResultsFromProtobufFileWithName:(NSString *)fileName
+                                        gestureLabel:(NSString *)gestureLabel {
+  LandmarksDetectionResultProto landmarkDetectionResultProto;
+
+  if (!get_proto_from_pbtxt(fileName.cppString, landmarkDetectionResultProto).ok()) {
+    return nil;
+  }
+  // Remove z position of landmarks, because they are not used in correctness
+  // testing. For video or live stream mode, the z positions varies a lot during
+  // tracking from frame to frame.
+  for (int i = 0; i < landmarkDetectionResultProto.landmarks().landmark().size(); i++) {
+    auto &landmark = *landmarkDetectionResultProto.mutable_landmarks()->mutable_landmark(i);
+    landmark.clear_z();
+  }
+
+  ClassificationListProto gesturesProto;
+  ClassificationProto *classificationProto = gesturesProto.add_classification();
+  classificationProto->set_label([gestureLabel UTF8String]);
+
+  return [MPPGestureRecognizerResult
+      gestureRecognizerResultWithHandGesturesProto:{gesturesProto}
+                                    handednessroto:{landmarkDetectionResultProto.classifications()}
+                               handLandmarksPacket:{landmarkDetectionResultProto.landmarks()}
+                              worldLandmarksPacket:{landmarkDetectionResultProto.world_landmarks()}
+                           timestampInMilliSeconds:0];
+}
+
+@end