private void TranscodeWorker()
{
while (true)
{
MediaSample sample = null;
lock (sync)
{
if (samples.Count > 0)
{
sample = samples.Dequeue();
}
}
if (sample != null)
{
if (!transcoder.Push(0, sample))
{
var error = transcoder.Error.Clone() as ErrorInfo;
LogError("Transcoder.Push", error);
transcoder.Close();
transcoder.Dispose();
Dispatcher.BeginInvoke(new Action <ErrorInfo>(SingalEncodeError), error);
return;
}
}
else
{
if (stopEncodeThread)
{
transcoder.Flush();
transcoder.Close();
transcoder.Dispose();
return;
}
else
{
Thread.Sleep(1);
}
}
}
}
public int SampleCB(double SampleTime, IMediaSample pSample)
{
if (!bProcess)
{
lastSampleTime = SampleTime;
return(WinAPI.E_FAIL);
}
// internal stats
++sampleIndex;
long tStart, tEnd;
pSample.GetMediaTime(out tStart, out tEnd);
Debug.Assert(tStart < tEnd);
Debug.Assert(tStart > lastMediaTime);
sampleProcessed += tEnd - tStart;
sampleDropped += tStart - lastMediaTime - 1;
lastMediaTime = tEnd - 1;
int dataLen = pSample.GetActualDataLength();
IntPtr bufPtr;
int hr = pSample.GetPointer(out bufPtr);
Debug.Assert(0 == hr);
// BEGIN TRACE
int bufSize = pSample.GetSize();
long timeStart, timeEnd;
pSample.GetTime(out timeStart, out timeEnd);
string msg = string.Format(
"SampleCB ({0}) {1}, sampleTime:{2} datalen:{3} bufsize:{4} mediaTime:{5}-{6} time:{7}-{8}",
name, sampleIndex, SampleTime, dataLen, bufSize, tStart, tEnd, timeStart, timeEnd);
Trace.WriteLine(msg);
if (tStart - lastMediaTime - 1 > 0)
{
msg = string.Format("!!! Frame drop: {0}", tStart - lastMediaTime - 1 > 0);
Trace.WriteLine(msg);
}
//END TRACE
byte[] buf = new byte[dataLen];
Marshal.Copy(bufPtr, buf, 0, dataLen);
if (file != null)
{
file.Write(buf, 0, dataLen);
}
//DBG - simulate encoding error
//if (sampleIndex > 100)
// goto STOP_CAPTURE;
if (mediaState != null && mediaState.mpeg2Enc != null)
{
PrimoSoftware.AVBlocks.Transcoder enc = mediaState.mpeg2Enc;
MediaSample inputSample = new MediaSample();
inputSample.Buffer = new MediaBuffer(buf);
inputSample.StartTime = Math.Max(SampleTime, 0);
//TODO: end time
try
{
bool pushed = false;
// transcoder.Push() is not threads safe.
// lock (enc){ } ensure that only one thread is calling transcoder.Push()
lock (enc)
{
pushed = enc.Push(StreamNumber, inputSample);
}
if (pushed)
{
return(0);
}
}
catch (Exception ex)
{
System.Diagnostics.Trace.WriteLine(ex.ToString());
}
Trace.WriteLine("PushSample FAILED");
}
//STOP_CAPTURE:
Trace.WriteLine("SampleCB: Before Post STOP_CAPTURE");
WinAPI.PostMessage(MainWindow, Util.WM_STOP_CAPTURE, new IntPtr(streamNumber), IntPtr.Zero);
Trace.WriteLine("SampleCB: After Post STOP_CAPTURE");
bProcess = false;
return(WinAPI.E_FAIL);
} // end of SampleCB
