//-------------------------------------------------------------------
// Name: WriteSampleToFile
// Description: Output one media sample to the file.
//-------------------------------------------------------------------
void WriteSampleToFile(IMFSample pSample)
{
int hr;
int i;
long time;
int cBufferCount; // Number of buffers in the sample.
IntPtr pData;
int cbData = 0;
int cbWritten = 0;
// Get the time stamp
hr = pSample.GetSampleTime(out time);
MFError.ThrowExceptionForHR(hr);
// If the time stamp is too early, just discard this sample.
if (time < m_StartTime)
{
return;
}
// Note: If there is no time stamp on the sample, proceed anyway.
// Find how many buffers are in this sample.
hr = pSample.GetBufferCount(out cBufferCount);
MFError.ThrowExceptionForHR(hr);
// Loop through all the buffers in the sample.
for (int iBuffer = 0; iBuffer < cBufferCount; iBuffer++)
{
IMFMediaBuffer pBuffer = null;
hr = pSample.GetBufferByIndex(iBuffer, out pBuffer);
MFError.ThrowExceptionForHR(hr);
try
{
// Lock the buffer and write the data to the file.
hr = pBuffer.Lock(out pData, out i, out cbData);
MFError.ThrowExceptionForHR(hr);
hr = m_pByteStream.Write(pData, cbData, out cbWritten);
MFError.ThrowExceptionForHR(hr);
hr = pBuffer.Unlock();
MFError.ThrowExceptionForHR(hr);
// Update the running tally of bytes written.
m_cbDataWritten += cbData;
}
finally
{
SafeRelease(pBuffer);
}
} // for loop
}