public void Dispose()
{
eventSubscription?.Dispose();
// dbgSaveTga?.Dispose();
decoded?.Dispose();
decoded = null;
encoded?.Dispose();
encoded = null;
}
public void initialize(iVideoTrack videoTrack, int encodedBuffersCount)
{
// dbgPrintEncodedFormats();
// Determine format of the encoded video
sPixelFormatMP encodedFormat = videoTrack.getEncodedFormat();
// Set format of the first and the only plane of the compressed video.
encodedFormat.numPlanes = 1;
encodedFormat.setPlaneFormat(0, new sPlanePixelFormat()
{
sizeImage = EncodedQueue.encodedVideoBufferSize(videoTrack)
});
// 4.5.1.5. Initialization
// 1. Set the coded format on OUTPUT via VIDIOC_S_FMT()
sStreamDataFormat sdf = new sStreamDataFormat()
{
bufferType = eBufferType.VideoOutputMPlane,
pix_mp = encodedFormat
};
device.file.call(eControlCode.S_FMT, ref sdf);
// Logger.logVerbose( "eControlCode.S_FMT completed OK for encoded format: {0}", sdf.pix_mp );
// 2 Allocate source (bytestream) buffers via VIDIOC_REQBUFS() on OUTPUT
encoded = new EncodedQueue(device, encodedBuffersCount, ref encodedFormat);
// 3 Start streaming on the OUTPUT queue via VIDIOC_STREAMON()
device.startStreaming(eBufferType.VideoOutputMPlane);
// Continue queuing/dequeuing bytestream buffers to/from the OUTPUT queue via VIDIOC_QBUF() and VIDIOC_DQBUF().
// The buffers will be processed and returned to the client in order, until required metadata to configure the CAPTURE queue are found.
// This is indicated by the decoder sending a V4L2_EVENT_SOURCE_CHANGE event with changes set to V4L2_EVENT_SRC_CH_RESOLUTION.
eventSubscription = new EventSubscription(device);
// Linux kernel on Pi4 appears to be too old and does not implement that spec. The event never arrives, while the encoded buffers are stuck in the Queued state.
// For this reason, we have to deal with dynamic resolution changes instead :-(
// WaitForResolution.wait( device, encoded, reader, waitForResolutionTimeout );
}
public DecoderThread(VideoDevice device, iVideoTrackReader reader, EncodedQueue encoded, DecodedQueue decoded, int shutdownEvent, iDecoderEvents eventsSink,
iAudioTrackReader audioReader, Audio.iDecoderQueues audioQueue)
{
this.device = device;
this.reader = reader;
this.encoded = encoded;
this.decoded = decoded;
this.shutdownEvent = shutdownEvent;
this.audioReader = audioReader;
this.audioQueue = audioQueue;
// Enqueue decoded buffers
decoded.enqueueAll();
this.eventsSink = eventsSink;
seekEventHandle = EventHandle.create();
// Remaining work is done in the thread
thread = new Thread(threadMain);
thread.IsBackground = true;
thread.Name = "Media player thread";
Logger.logInfo("Launching the video decoding thread");
thread.Start();
}
