protected override void GetSampleAsync(MediaStreamType eMediaStreamType)
{
Dictionary <MediaSampleAttributeKeys, string> emptyDict = new Dictionary <MediaSampleAttributeKeys, string>();
MediaStreamSample cMediaStreamSample = null;
NALUnit cNALUnit = null;
lock (_cSyncRoot)
{
if (!_bCached && _nCurrentFrameVideo >= _nFramesBuffered)
{
this.ReportGetSampleProgress(0);
if (MediaStreamType.Audio == eMediaStreamType)
{
_bAudioFrameNeeded = true;
}
else
{
_bVideoFrameNeeded = true;
}
return;
}
if (MediaStreamType.Audio == eMediaStreamType)
{
_bAudioFrameNeeded = false;
}
else
{
_bVideoFrameNeeded = false;
}
}
if (eMediaStreamType == MediaStreamType.Audio)
{
try
{
lock (_cSyncRoot)
{
if (0 < _aAudioNALs.Count && _aAudioNALs.Count > _nFrameOffsetAudio)
{
cNALUnit = _aAudioNALs[_nFrameOffsetAudio++];
}
}
if (null != cNALUnit)
{
cMediaStreamSample = new MediaStreamSample(_cMediaStreamAudioDescription, new MemoryStream(_cStream.Read(cNALUnit.nStart, cNALUnit.nBytesQty)), 0, cNALUnit.nBytesQty, (long)(_nCurrentFrameAudio * _nSampleDuration), emptyDict); //(long)(_nCurrentFrameAudio * _nSampleDuration)
_nCurrentFrameAudio++;
}
}
catch { }
if (null == cMediaStreamSample)
{
cMediaStreamSample = new MediaStreamSample(_cMediaStreamAudioDescription, null, 0, 0, 0, emptyDict);
}
}
else
{
try
{
lock (_cSyncRoot)
if (0 < _aVideoNALs.Count && _aVideoNALs.Count > _nFrameOffsetVideo)
{
cNALUnit = _aVideoNALs[_nFrameOffsetVideo++];
}
if (null != cNALUnit)
{
cMediaStreamSample = new MediaStreamSample(_cMediaStreamVideoDescription, new MemoryStream(_cStream.Read(cNALUnit.nStart, cNALUnit.nBytesQty)), 0, cNALUnit.nBytesQty, (long)(_nCurrentFrameVideo * _nFrameDuration), emptyDict); //(long)(_nCurrentFrameVideo * _nFrameDuration)
}
if (null == cNALUnit || cNALUnit.bFrameStart)
{
_nCurrentFrameVideo++;
}
}
catch { }
if (null == cMediaStreamSample)
{
cMediaStreamSample = new MediaStreamSample(_cMediaStreamVideoDescription, null, 0, 0, 0, emptyDict);
}
}
this.ReportGetSampleCompleted(cMediaStreamSample);
}
