/// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
/// <summary>
/// Called when the sample grabber sink processes a sample. We can use this
/// to do what we want with the sample
/// </summary>
/// <param name="guidMajorMediaType">the media type</param>
/// <param name="sampleFlags">the sample flags</param>
/// <param name="sampleSize">the sample size</param>
/// <param name="sampleDuration">the sample duration</param>
/// <param name="sampleTimeStamp">the sample time</param>
/// <param name="sampleBuffer">the sample buffer</param>
/// <param name="sampleAttributes">the attributes for the sample</param>
/// <history>
/// 01 Nov 18 Cynic - Ported in
/// </history>
public HResult OnProcessSampleEx(Guid guidMajorMediaType, int sampleFlags, long sampleTimeStamp, long sampleDuration, IntPtr sampleBuffer, int sampleSize, IMFAttributes sampleAttributes)
{
IMFSample outputSample = null;
HResult hr;
try
{
if (sinkWriter == null)
{
string errMsg = "OnProcessSample, Error sinkWriter==null";
SampleGrabberAsyncCallBackError(this, errMsg, null);
return(HResult.E_FAIL);
}
// we have all the information we need to create a new output sample
outputSample = TantaWMFUtils.CreateMediaSampleFromIntPtr(sampleFlags, sampleTimeStamp, sampleDuration, sampleBuffer, sampleSize, sampleAttributes);
if (outputSample == null)
{
string errMsg = "OnProcessSample, Error on call to CreateMediaSampleFromBuffer outputSample == null";
SampleGrabberAsyncCallBackError(this, errMsg, null);
return(HResult.E_FAIL);
}
lock (sinkWriter)
{
// write the sample out
hr = sinkWriter.WriteSample(sinkWriterMediaStreamId, outputSample);
if (Failed(hr))
{
string errMsg = "OnProcessSample, Error on WriteSample =" + hr.ToString();
SampleGrabberAsyncCallBackError(this, errMsg, null);
return(hr);
}
// if you do not set MF_SINK_WRITER_DISABLE_THROTTLING on the sink writer, the
// calls below can sometimes be useful to avoid the sink writer stalling for a bit
// while it waits for one stream or the other. In fact is a bit disconcerting
// that we do not seem to get any of these in the sample grabber.
// sinkWriter.SendStreamTick(sinkWriterMediaStreamId, sampleTimeStamp);
// sinkWriter.NotifyEndOfSegment(sinkWriterMediaStreamId);
}
}
finally
{
if (outputSample != null)
{
Marshal.ReleaseComObject(outputSample);
outputSample = null;
}
}
return(HResult.S_OK);
}
/// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
/// <summary>
/// Called when the sample grabber sink processes a sample. We can use this
/// to do what we want with the media data
/// </summary>
/// <param name="guidMajorMediaType">the media type</param>
/// <param name="sampleFlags">the sample flags</param>
/// <param name="sampleSize">the sample size</param>
/// <param name="sampleDuration">the sample duration</param>
/// <param name="sampleTimeStamp">the sample time</param>
/// <param name="sampleBuffer">the sample buffer</param>
/// <param name="sampleAttributes">the attributes for the sample</param>
/// <history>
/// 01 Nov 18 Cynic - Ported in
/// </history>
public HResult OnProcessSampleEx(Guid guidMajorMediaType, int sampleFlags, long sampleTimeStamp, long sampleDuration, IntPtr sampleBuffer, int sampleSize, IMFAttributes sampleAttributes)
{
IMFSample outputSample = null;
HResult hr;
try
{
if (sinkWriter == null)
{
string errMsg = "OnProcessSample, Error sinkWriter==null";
SampleGrabberAsyncCallBackError(this, errMsg, null);
return(HResult.E_FAIL);
}
// we have all the information we need to create a new output sample
outputSample = TantaWMFUtils.CreateMediaSampleFromIntPtr(sampleFlags, sampleTimeStamp, sampleDuration, sampleBuffer, sampleSize, null);
if (outputSample == null)
{
string errMsg = "OnProcessSample, Error on call to CreateMediaSampleFromBuffer outputSample == null";
SampleGrabberAsyncCallBackError(this, errMsg, null);
return(HResult.E_FAIL);
}
// write the sample out
hr = sinkWriter.WriteSample(sinkWriterMediaStreamId, outputSample);
if (Failed(hr))
{
string errMsg = "OnProcessSample, Error on WriteSample =" + hr.ToString();
SampleGrabberAsyncCallBackError(this, errMsg, null);
return(hr);
}
}
finally
{
if (outputSample != null)
{
Marshal.ReleaseComObject(outputSample);
outputSample = null;
}
}
return(HResult.S_OK);
}