//todo: put the process work to background thread to speed up.
public HResult ProcessSample(IMFSample videoSample)
{
HResult hr = HResult.S_OK;
MFTOutputStatusFlags mftOutFlags;
MFTOutputStreamInfo StreamInfo;
if (videoSample == null)
{
return(hr);
}
pDecoderTransform.ProcessInput(0, videoSample, 0);
pDecoderTransform.GetOutputStatus(out mftOutFlags);
pDecoderTransform.GetOutputStreamInfo(0, out StreamInfo);
while (true)
{
IMFMediaBuffer resultBuffer;
//reset the cache buffer.
MFExtern.MFCreateMemoryBuffer(StreamInfo.cbSize, out resultBuffer);
_mftOutSample.RemoveAllBuffers();
_mftOutSample.AddBuffer(resultBuffer);
ProcessOutputStatus outputStatus;
var mftProcessOutput = pDecoderTransform.ProcessOutput(0, 1, _mftOutBufferContainer, out outputStatus);
if (mftProcessOutput == HResult.MF_E_TRANSFORM_NEED_MORE_INPUT)
{
//continue provice input data.
break;
}
else if (_mftOutBufferContainer[0].dwStatus == MFTOutputDataBufferFlags.Incomplete)
{
//todo: the decoded data include more than one samples,we need to receive all data items.
}
else
{
IMFMediaBuffer buffer;
_mftOutSample.ConvertToContiguousBuffer(out buffer);
invokeDecodeComplete(buffer, StreamInfo.cbSize);
}
}
return(hr);
}
private int ReadFromTransform()
{
MFT_OUTPUT_DATA_BUFFER[] array = new MFT_OUTPUT_DATA_BUFFER[1];
IMFSample iMFSample = MediaFoundationApi.CreateSample();
IMFMediaBuffer iMFMediaBuffer = MediaFoundationApi.CreateMemoryBuffer(this.outputBuffer.Length);
iMFSample.AddBuffer(iMFMediaBuffer);
iMFSample.SetSampleTime(this.outputPosition);
array[0].pSample = iMFSample;
_MFT_PROCESS_OUTPUT_STATUS mFT_PROCESS_OUTPUT_STATUS;
int num = this.transform.ProcessOutput(_MFT_PROCESS_OUTPUT_FLAGS.None, 1, array, out mFT_PROCESS_OUTPUT_STATUS);
if (num == -1072861838)
{
Marshal.ReleaseComObject(iMFMediaBuffer);
Marshal.ReleaseComObject(iMFSample);
return(0);
}
if (num != 0)
{
Marshal.ThrowExceptionForHR(num);
}
IMFMediaBuffer iMFMediaBuffer2;
array[0].pSample.ConvertToContiguousBuffer(out iMFMediaBuffer2);
IntPtr source;
int num2;
int num3;
iMFMediaBuffer2.Lock(out source, out num2, out num3);
this.outputBuffer = BufferHelpers.Ensure(this.outputBuffer, num3);
Marshal.Copy(source, this.outputBuffer, 0, num3);
this.outputBufferOffset = 0;
this.outputBufferCount = num3;
iMFMediaBuffer2.Unlock();
this.outputPosition += MediaFoundationTransform.BytesToNsPosition(this.outputBufferCount, this.WaveFormat);
Marshal.ReleaseComObject(iMFMediaBuffer);
iMFSample.RemoveAllBuffers();
Marshal.ReleaseComObject(iMFSample);
Marshal.ReleaseComObject(iMFMediaBuffer2);
return(num3);
}