| 1 | package kaka.cakelight.mode; |
| 2 | |
| 3 | import kaka.cakelight.Configuration; |
| 4 | import kaka.cakelight.FrameGrabber; |
| 5 | import kaka.cakelight.VideoDeviceListener; |
| 6 | import kaka.cakelight.VideoFrame; |
| 7 | |
| 8 | import java.io.File; |
| 9 | import java.io.IOException; |
| 10 | import java.util.Optional; |
| 11 | import java.util.function.Consumer; |
| 12 | |
| 13 | public class VideoMode extends Mode { |
| 14 | private Configuration config; |
| 15 | private Thread grabberThread; |
| 16 | private Consumer<VideoFrame> frameConsumer; |
| 17 | private VideoDeviceListener deviceListener; |
| 18 | private boolean isPaused = false; |
| 19 | |
| 20 | public VideoMode() { |
| 21 | deviceListener = new VideoDeviceListener(); |
| 22 | deviceListener.onVideoDeviceChange(this::onVideoDeviceChange); |
| 23 | } |
| 24 | |
| 25 | @Override |
| 26 | public void enter(Configuration config) { |
| 27 | this.config = config; |
| 28 | if (config.video.deviceIsAutomatic) { |
| 29 | deviceListener.startListening(); |
| 30 | } else { |
| 31 | File videoDevice = new File(config.video.device); |
| 32 | startGrabberThread(videoDevice); |
| 33 | } |
| 34 | } |
| 35 | |
| 36 | @Override |
| 37 | public void pause() { |
| 38 | isPaused = true; |
| 39 | } |
| 40 | |
| 41 | @Override |
| 42 | public void resume() { |
| 43 | isPaused = false; |
| 44 | synchronized (grabberThread) { |
| 45 | grabberThread.notify(); |
| 46 | } |
| 47 | } |
| 48 | |
| 49 | @Override |
| 50 | public void exit() { |
| 51 | grabberThread.interrupt(); |
| 52 | if (config.video.deviceIsAutomatic) { |
| 53 | deviceListener.stopListening(); |
| 54 | } |
| 55 | } |
| 56 | |
| 57 | private void startGrabberThread(File videoDevice) { |
| 58 | assert frameConsumer != null; |
| 59 | grabberThread = new Thread() { |
| 60 | public void run() { |
| 61 | try (FrameGrabber grabber = FrameGrabber.from(videoDevice, config)) { |
| 62 | while (!isInterrupted()) { |
| 63 | Optional<VideoFrame> frame = grabber.grabFrame(); |
| 64 | if (isPaused) { |
| 65 | synchronized (grabberThread) { |
| 66 | wait(); |
| 67 | } |
| 68 | } |
| 69 | if (frameConsumer != null) frame.ifPresent(frameConsumer); |
| 70 | frame.ifPresent(VideoMode.this::onVideoFrame); |
| 71 | // timeIt("frame", grabber::grabFrame); |
| 72 | } |
| 73 | } catch (IOException | InterruptedException e) { |
| 74 | e.printStackTrace(); |
| 75 | } |
| 76 | } |
| 77 | }; |
| 78 | grabberThread.start(); |
| 79 | } |
| 80 | |
| 81 | public void onVideoFrame(Consumer<VideoFrame> consumer) { |
| 82 | frameConsumer = consumer; |
| 83 | } |
| 84 | |
| 85 | private void onVideoFrame(VideoFrame frame) { |
| 86 | updateWithFrame(frame.getLedFrame()); |
| 87 | } |
| 88 | |
| 89 | public void onVideoDeviceChange(Optional<File> videoDevice) { |
| 90 | // Should only happen when this mode is active! |
| 91 | if (grabberThread != null) { |
| 92 | grabberThread.interrupt(); |
| 93 | } |
| 94 | videoDevice.ifPresent(this::startGrabberThread); |
| 95 | } |
| 96 | } |