private IMFSample ReadFromSource()
{
int num = this.sourceProvider.Read(this.sourceBuffer, 0, this.sourceBuffer.Length);
if (num == 0)
{
return(null);
}
IMFMediaBuffer iMFMediaBuffer = MediaFoundationApi.CreateMemoryBuffer(num);
IntPtr destination;
int num2;
int num3;
iMFMediaBuffer.Lock(out destination, out num2, out num3);
Marshal.Copy(this.sourceBuffer, 0, destination, num);
iMFMediaBuffer.Unlock();
iMFMediaBuffer.SetCurrentLength(num);
IMFSample expr_53 = MediaFoundationApi.CreateSample();
expr_53.AddBuffer(iMFMediaBuffer);
expr_53.SetSampleTime(this.inputPosition);
long num4 = MediaFoundationTransform.BytesToNsPosition(num, this.sourceProvider.WaveFormat);
expr_53.SetSampleDuration(num4);
this.inputPosition += num4;
Marshal.ReleaseComObject(iMFMediaBuffer);
return(expr_53);
}
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);
}