void seekFunc(double positionSeconds, VideoLib.VideoPlayer.SeekKeyframeMode mode)
{
if (VideoState == VideoPlayerControl.VideoState.CLOSED)
{
return;
}
// wait for video and audio decoding to block
// To make sure no packets are in limbo
// before flushing any ffmpeg internal or external queues.
videoDecoder.FrameQueue.setState(FrameQueue.FrameQueueState.BLOCK, FrameQueue.FrameQueueState.BLOCK,
FrameQueue.FrameQueueState.BLOCK);
if (videoDecoder.seek(positionSeconds, mode) == true)
{
// flush the framequeue and audioplayer buffer
videoDecoder.FrameQueue.flush();
audioPlayer.flush();
audioFrameTimer = videoFrameTimer = HRTimer.getTimestamp();
}
if (VideoState == VideoPlayerControl.VideoState.PLAYING)
{
videoDecoder.FrameQueue.setState(FrameQueue.FrameQueueState.PLAY,
FrameQueue.FrameQueueState.PLAY, FrameQueue.FrameQueueState.PLAY);
}
else if (VideoState == VideoPlayerControl.VideoState.PAUSED)
{
// display the first new frame in paused mode
videoDecoder.FrameQueue.startSingleFrame();
}
}
public async Task seek(double positionSeconds, VideoLib.VideoPlayer.SeekKeyframeMode mode = VideoLib.VideoPlayer.SeekKeyframeMode.SEEK_BACKWARDS)
{
if (videoDecoder.FrameQueue.IsBuffering)
{
return;
}
if (SeekTask != null)
{
try
{
await SeekTask;
}
catch (TaskCanceledException)
{
}
}
SeekTask = Task.Factory.StartNew(() => seekFunc(positionSeconds, mode), CancelTokenSource.Token);
}
