diff --git a/mediapipe/tasks/ios/vision/object_detector/utils/BUILD b/mediapipe/tasks/ios/vision/object_detector/utils/BUILD index 78b3c286e..70499e98d 100644 --- a/mediapipe/tasks/ios/vision/object_detector/utils/BUILD +++ b/mediapipe/tasks/ios/vision/object_detector/utils/BUILD @@ -30,3 +30,13 @@ objc_library( ], ) +objc_library( + name = "MPPObjectDetectionResultHelpers", + srcs = ["sources/MPPObjectDetectionResult+Helpers.mm"], + hdrs = ["sources/MPPObjectDetectionResult+Helpers.h"], + deps = [ + "//mediapipe/framework:packet", + "//mediapipe/tasks/ios/components/containers/utils:MPPDetectionHelpers", + "//mediapipe/tasks/ios/vision/object_detector:MPPObjectDetectionResult", + ], +) diff --git a/mediapipe/tasks/ios/vision/object_detector/utils/sources/MPPObjectDetectionResult+Helpers.h b/mediapipe/tasks/ios/vision/object_detector/utils/sources/MPPObjectDetectionResult+Helpers.h new file mode 100644 index 000000000..645f5c565 --- /dev/null +++ b/mediapipe/tasks/ios/vision/object_detector/utils/sources/MPPObjectDetectionResult+Helpers.h @@ -0,0 +1,38 @@ +// 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/object_detector/sources/MPPObjectDetectionResult.h" + +#include "mediapipe/framework/packet.h" + +NS_ASSUME_NONNULL_BEGIN + +static const int kMicroSecondsPerMilliSecond = 1000; + +@interface MPPObjectDetectionResult (Helpers) + +/** + * Creates an `MPPObjectDetectionResult` from a MediaPipe packet containing a + * `std::vector`. + * + * @param packet a MediaPipe packet wrapping a `std::vector`. + * + * @return An `MPPObjectDetectionResult` object that contains a list of detections. + */ ++ (nullable MPPObjectDetectionResult *)objectDetectionResultWithDetectionsPacket: + (const mediapipe::Packet &)packet; + +@end + +NS_ASSUME_NONNULL_END diff --git a/mediapipe/tasks/ios/vision/object_detector/utils/sources/MPPObjectDetectionResult+Helpers.mm b/mediapipe/tasks/ios/vision/object_detector/utils/sources/MPPObjectDetectionResult+Helpers.mm new file mode 100644 index 000000000..3507b7d72 --- /dev/null +++ b/mediapipe/tasks/ios/vision/object_detector/utils/sources/MPPObjectDetectionResult+Helpers.mm @@ -0,0 +1,45 @@ +// 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/object_detector/utils/sources/MPPObjectDetectionResult+Helpers.h" + +#import "mediapipe/tasks/ios/components/containers/utils/sources/MPPDetection+Helpers.h" + +namespace { +using DetectionProto = ::mediapipe::Detection; +using ::mediapipe::Packet; +} // namespace + +@implementation MPPObjectDetectionResult (Helpers) + ++ (nullable MPPObjectDetectionResult *)objectDetectionResultWithDetectionsPacket: + (const Packet &)packet { + if (!packet.ValidateAsType>().ok()) { + return nil; + } + + const std::vector &detectionProtos = packet.Get>(); + + NSMutableArray *detections = + [NSMutableArray arrayWithCapacity:(NSUInteger)detectionProtos.size()]; + for (const auto &detectionProto : detectionProtos) { + [detections addObject:[MPPDetection detectionWithProto:detectionProto]]; + } + + return [[MPPObjectDetectionResult alloc] + initWithDetections:detections + timestampMs:(NSInteger)(packet.Timestamp().Value() / kMicroSecondsPerMilliSecond)]; +} + +@end