public async Task PlayVideo(Uri uri)
{
if (await _sessionSetupLock.WaitAsync(0) == false)
{
return;
}
Debug.WriteLine("VideoPlayerViewModel::PlayVideo()");
try {
if (_rtspHandler != null || _mediaSource != null)
{
await StopVideoCore();
}
_rtspHandler = new RtspHandler(uri);
_rtspHandler.Connect();
_mediaSource = new RtspMediaSource();
var videoConfig = new RtspMediaSource.StreamConfig()
{
SourceStream = _rtspHandler.VideoStream,
ParameterString = _rtspHandler.VideoParameter,
FixedFrameRate = new Ratio(Configuration.VideoFrameRate, 1)
};
var audioConfig = new RtspMediaSource.StreamConfig()
{
SourceStream = _rtspHandler.AudioStream,
ParameterString = _rtspHandler.AudioParameter
};
_mediaSource.Open(videoConfig, audioConfig);
_session.Load(_mediaSource);
_rtspHandler.Play();
// Wait PlayStarted to be true
await _rtspHandler.PlayStarted.Where(b => b).Timeout(OperationTimeoutSpan).Take(1);
_session.Play();
// Wait IsPlaying to be true or PlayFailed
var playresult = await _session.IsSessionReadyChanged.Where(b => b).Select(b => 0).Merge(_session.PlayFailed).Timeout(OperationTimeoutSpan).Take(1);
if (playresult != 0)
{
Debug.WriteLine($"VideoPlayerViewModel::PlayVideo() Play Failed. Code=0x{playresult:X8}");
IsEnabled = false;
await StopVideoCore();
}
} catch (Exception ex) {
Debug.WriteLine($"VideoPlayerViewModel::PlayVideo() Exception '{ex.Message}'");
IsEnabled = false;
} finally {
_sessionSetupLock.Release();
}
}
public VideoPlayerModel()
{
_rtspHandler = null;
_mediaSource = null;
_sessionSetupLock = new SemaphoreSlim(1, 1);
_session = new HwndRenderSession();
_session.IsSessionReadyChanged.Where(b => b).Subscribe(_ => {
SetVideoSize(_videoHostPosition);
_session.Volume = _volume;
_session.IsMuted = _isMuted;
});
IsEnabled = true;
_videoHostPosition = Int32Rect.Empty;
_volume = 1.0f;
_isMuted = false;
}
private async Task StopVideoCore()
{
Debug.WriteLine("VideoPlayerViewModel::StopVideoCore()");
try {
_session.Stop();
_session.Close();
// Wait IsSessionReady to be false
await _session.IsSessionReadyChanged.Where(b => !b).Timeout(OperationTimeoutSpan).Take(1);
_rtspHandler?.Disconnect();
_rtspHandler?.Dispose();
_mediaSource?.Shutdown();
_mediaSource?.Dispose();
} catch (Exception ex) {
Debug.WriteLine($"VideoPlayerViewModel::StopVideoCore() Exception '{ex.Message}'");
} finally {
_rtspHandler = null;
_mediaSource = null;
}
}
