private void FfmpegListener()
{
ReasonToFinishPlaying reasonToStop = ReasonToFinishPlaying.StoppedByUser;
VideoFileReader vfr = null;
Program.WriterMutex.WaitOne();
try
{
vfr = new VideoFileReader();
vfr.Open(_source);
}
catch (Exception ex)
{
Log.Error("", ex);//MainForm.LogExceptionToFile(ex);
}
Program.WriterMutex.ReleaseMutex();
if (vfr == null || !vfr.IsOpen)
{
if (PlayingFinished != null)
{
PlayingFinished(this, ReasonToFinishPlaying.VideoSourceError);
}
return;
}
bool hasaudio = false;
if (vfr.Channels > 0)
{
hasaudio = true;
RecordingFormat = new WaveFormat(vfr.SampleRate, 16, vfr.Channels);
WaveOutProvider = new BufferedWaveProvider(RecordingFormat)
{
DiscardOnBufferOverflow = true
};
_waveProvider = new BufferedWaveProvider(RecordingFormat)
{
DiscardOnBufferOverflow = true
};
_sampleChannel = new SampleChannel(_waveProvider);
_meteringProvider = new MeteringSampleProvider(_sampleChannel);
_meteringProvider.StreamVolume += MeteringProviderStreamVolume;
if (HasAudioStream != null)
{
HasAudioStream(this, EventArgs.Empty);
}
}
int interval = 1000 / ((vfr.FrameRate == 0) ? 25 : vfr.FrameRate);
byte[] data;
Bitmap frame;
try
{
while (!_stopEvent.WaitOne(0, false))
{
DateTime start = DateTime.Now;
frame = vfr.ReadVideoFrame();
if (frame == null)
{
reasonToStop = ReasonToFinishPlaying.EndOfStreamReached;
break;
}
if (NewFrame != null)
{
NewFrame(this, new NewFrameEventArgs(frame));
}
frame.Dispose();
if (hasaudio)
{
data = vfr.ReadAudioFrame();
if (DataAvailable != null)
{
_waveProvider.AddSamples(data, 0, data.Length);
if (Listening)
{
WaveOutProvider.AddSamples(data, 0, data.Length);
}
_mFramesReceived++;
//forces processing of volume level without piping it out
var sampleBuffer = new float[data.Length];
_meteringProvider.Read(sampleBuffer, 0, data.Length);
DataAvailable(this, new DataAvailableEventArgs((byte[])data.Clone()));
}
}
if (interval > 0)
{
// get frame extract duration
TimeSpan span = DateTime.Now.Subtract(start);
// miliseconds to sleep
int msec = interval - (int)span.TotalMilliseconds;
if ((msec > 0) && (_stopEvent.WaitOne(msec, false)))
{
break;
}
}
}
}
catch (Exception e)
{
if (VideoSourceError != null)
{
VideoSourceError(this, new VideoSourceErrorEventArgs(e.Message));
}
Log.Error("", e);//MainForm.LogExceptionToFile(e);
reasonToStop = ReasonToFinishPlaying.DeviceLost;
}
if (PlayingFinished != null)
{
PlayingFinished(this, reasonToStop);
}
}