private void FfmpegListener()
{
_reasonToStop = ReasonToFinishPlaying.StoppedByUser;
_vfr = null;
bool open = false;
string errmsg = "";
_realtime = !IsFileSource;
try
{
Program.FFMPEGMutex.WaitOne();
_vfr = new VideoFileReader();
//ensure http/https is lower case for string compare in ffmpeg library
int i = _source.IndexOf("://", StringComparison.Ordinal);
if (i > -1)
{
_source = _source.Substring(0, i).ToLower() + _source.Substring(i);
}
_vfr.Timeout = Timeout;
_vfr.AnalyzeDuration = AnalyzeDuration;
_vfr.Cookies = Cookies;
_vfr.UserAgent = UserAgent;
_vfr.Headers = Headers;
_vfr.Flags = -1;
_vfr.NoBuffer = _realtime;
_vfr.RTSPMode = RTSPMode;
_vfr.Open(_source);
open = true;
}
catch (Exception ex)
{
MainForm.LogErrorToFile(ex.Message + ": " + _source);
}
finally
{
try
{
Program.FFMPEGMutex.ReleaseMutex();
}
catch (ObjectDisposedException)
{
//can happen on shutdown
}
}
if (_vfr == null || !_vfr.IsOpen || !open)
{
ShutDown("Could not open stream" + ": " + _source);
return;
}
if (_stopEvent.WaitOne(0))
{
ShutDown("");
return;
}
bool hasaudio = false;
if (_vfr.Channels > 0)
{
hasaudio = true;
RecordingFormat = new WaveFormat(_vfr.SampleRate, 16, _vfr.Channels);
_waveProvider = new BufferedWaveProvider(RecordingFormat)
{
DiscardOnBufferOverflow = true, BufferDuration = TimeSpan.FromMilliseconds(500)
};
SampleChannel = new SampleChannel(_waveProvider);
SampleChannel.PreVolumeMeter += SampleChannelPreVolumeMeter;
if (HasAudioStream != null)
{
HasAudioStream(this, EventArgs.Empty);
}
}
HasAudioStream = null;
Duration = _vfr.Duration;
if (!_realtime)
{
_tOutput = new Thread(FrameEmitter)
{
Name = "ffmpeg frame emitter"
};
_tOutput.Start();
}
else
{
_tOutput = null;
}
_videoframes = new List <DelayedFrame>();
_audioframes = new List <DelayedAudio>();
double maxdrift = 0, firstmaxdrift = 0;
const int analyseInterval = 10;
DateTime dtAnalyse = DateTime.MinValue;
//LastFrame = Helper.Now;
if (_initialSeek > -1)
{
_vfr.Seek(_initialSeek);
}
try
{
while (!_stopEvent.WaitOne(5) && !MainForm.Reallyclose && NewFrame != null)
{
_bufferFull = !_realtime && (_videoframes.Count > MAXBuffer || _audioframes.Count > MAXBuffer);
if (!_paused && !_bufferFull)
{
if (DecodeFrame(analyseInterval, hasaudio, ref firstmaxdrift, ref maxdrift, ref dtAnalyse))
{
break;
}
if (_realtime && !_stopEvent.WaitOne(0))
{
if (_videoframes.Count > 0)
{
DelayedFrame q = _videoframes[0];
if (q.B != null)
{
if (NewFrame != null)
{
NewFrame(this, new NewFrameEventArgs(q.B));
}
q.B.Dispose();
}
_videoframes.RemoveAt(0);
}
if (_audioframes.Count > 0)
{
DelayedAudio q = _audioframes[0];
if (q.A != null)
{
ProcessAudio(q.A);
}
_audioframes.RemoveAt(0);
}
}
}
}
}
catch (Exception e)
{
MainForm.LogExceptionToFile(e);
errmsg = e.Message;
}
if (SampleChannel != null)
{
SampleChannel.PreVolumeMeter -= SampleChannelPreVolumeMeter;
SampleChannel = null;
}
if (_waveProvider != null)
{
if (_waveProvider.BufferedBytes > 0)
{
_waveProvider.ClearBuffer();
}
}
if (_tOutput != null)
{
try
{
if (!_tOutput.Join(TimeSpan.Zero))
{
_tOutput.Join();
}
}
catch {}
}
ShutDown(errmsg);
}
private bool EmitFrame(bool first)
{
try
{
if (_videoframes.Count > 0)
{
DelayedFrame q = _videoframes[0];
if (q != null)
{
if (first)
{
first = false;
_sw.Start();
}
if (_sw.ElapsedMilliseconds + _stopWatchOffset > q.ShowTime)
{
if (q.B != null)
{
if (NewFrame != null)
{
NewFrame(this, new NewFrameEventArgs(q.B));
}
q.B.Dispose();
}
_videoframes.RemoveAt(0);
}
}
else
{
_videoframes.RemoveAt(0);
}
}
if (_audioframes.Count > 0)
{
DelayedAudio q = _audioframes[0];
if (q != null)
{
if (first)
{
first = false;
_sw.Start();
}
var dispTime = _sw.ElapsedMilliseconds + _stopWatchOffset;
if (dispTime > q.ShowTime)
{
if (q.A != null)
{
ProcessAudio(q.A);
}
_audioframes.RemoveAt(0);
}
}
else
{
_audioframes.RemoveAt(0);
}
}
}
catch (Exception ex)
{
MainForm.LogExceptionToFile(ex);
}
return(first);
}
