64 lines
2.4 KiB
Plaintext
64 lines
2.4 KiB
Plaintext
// Copyright 2019 The MediaPipe Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#import "HandTrackingViewController.h"
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#include "mediapipe/framework/formats/landmark.pb.h"
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static const char* kLandmarksOutputStream = "hand_landmarks";
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static const char* kNumHandsInputSidePacket = "num_hands";
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// Max number of hands to detect/process.
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static const int kNumHands = 2;
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@implementation HandTrackingViewController
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#pragma mark - UIViewController methods
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- (void)viewDidLoad {
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[super viewDidLoad];
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[self.mediapipeGraph setSidePacket:(mediapipe::MakePacket<int>(kNumHands))
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named:kNumHandsInputSidePacket];
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[self.mediapipeGraph addFrameOutputStream:kLandmarksOutputStream
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outputPacketType:MPPPacketTypeRaw];
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}
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#pragma mark - MPPGraphDelegate methods
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// Receives a raw packet from the MediaPipe graph. Invoked on a MediaPipe worker thread.
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- (void)mediapipeGraph:(MPPGraph*)graph
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didOutputPacket:(const ::mediapipe::Packet&)packet
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fromStream:(const std::string&)streamName {
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if (streamName == kLandmarksOutputStream) {
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if (packet.IsEmpty()) {
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NSLog(@"[TS:%lld] No hand landmarks", packet.Timestamp().Value());
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return;
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}
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const auto& multiHandLandmarks = packet.Get<std::vector<::mediapipe::NormalizedLandmarkList>>();
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NSLog(@"[TS:%lld] Number of hand instances with landmarks: %lu", packet.Timestamp().Value(),
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multiHandLandmarks.size());
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for (int handIndex = 0; handIndex < multiHandLandmarks.size(); ++handIndex) {
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const auto& landmarks = multiHandLandmarks[handIndex];
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NSLog(@"\tNumber of landmarks for hand[%d]: %d", handIndex, landmarks.landmark_size());
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for (int i = 0; i < landmarks.landmark_size(); ++i) {
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NSLog(@"\t\tLandmark[%d]: (%f, %f, %f)", i, landmarks.landmark(i).x(),
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landmarks.landmark(i).y(), landmarks.landmark(i).z());
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}
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}
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}
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}
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@end
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