// Processes media sample received from the header
internal void ProcessSample(StspSampleHeader sampleHead, IMFSample sample)
{
Debug.Assert(sample != null);
try
{
ThrowIfError(CheckShutdown());
// Set sample attributes
SetSampleAttributes(sampleHead, sample);
// Check if we are in propper state if so deliver the sample otherwise just skip it and don't treat it as an error.
if (_eSourceState == SourceState.SourceState_Started)
{
// Put sample on the list
_samples.Enqueue(sample);
// Deliver samples
DeliverSamples();
}
else
{
Throw(HResult.MF_E_UNEXPECTED);
}
}
catch (Exception ex)
{
HandleError(ex.HResult);
}
}
void SET_SAMPLE_ATTRIBUTE(StspSampleHeader sampleHeader, IMFSample pSample, Guid flag, StspSampleFlags flagValue)
{
var value = (int)flagValue;
if ((value & sampleHeader.dwFlagMasks) == value)
{
ThrowIfError(pSample.SetUINT32(flag, ((value & sampleHeader.dwFlags) == value) ? 1 : 0));
}
}
private void SetSampleAttributes(StspSampleHeader sampleHeader, IMFSample sample)
{
ThrowIfError(sample.SetSampleTime(sampleHeader.ullTimestamp));
ThrowIfError(sample.SetSampleDuration(sampleHeader.ullDuration));
SET_SAMPLE_ATTRIBUTE(sampleHeader, sample, MFSampleExtension_BottomFieldFirst, StspSampleFlags.StspSampleFlag_BottomFieldFirst);
SET_SAMPLE_ATTRIBUTE(sampleHeader, sample, MFSampleExtension_CleanPoint, StspSampleFlags.StspSampleFlag_CleanPoint);
SET_SAMPLE_ATTRIBUTE(sampleHeader, sample, MFSampleExtension_DerivedFromTopField, StspSampleFlags.StspSampleFlag_DerivedFromTopField);
SET_SAMPLE_ATTRIBUTE(sampleHeader, sample, MFSampleExtension_Discontinuity, StspSampleFlags.StspSampleFlag_Discontinuity);
SET_SAMPLE_ATTRIBUTE(sampleHeader, sample, MFSampleExtension_Interlaced, StspSampleFlags.StspSampleFlag_Interlaced);
SET_SAMPLE_ATTRIBUTE(sampleHeader, sample, MFSampleExtension_RepeatFirstField, StspSampleFlags.StspSampleFlag_RepeatFirstField);
SET_SAMPLE_ATTRIBUTE(sampleHeader, sample, MFSampleExtension_SingleField, StspSampleFlags.StspSampleFlag_SingleField);
/* show debug info...
* int cbTotalLen;
* sample.GetTotalLength(out cbTotalLen);
* var isKeyFrame = Convert.ToBoolean(sampleHeader.dwFlags & (int)StspSampleFlags.StspSampleFlag_CleanPoint);
* Debug.WriteLine($"{DateTime.Now.ToString()} Received sample {sampleHeader.ullTimestamp} Duration-{sampleHeader.ullDuration} Length-{cbTotalLen} " + (isKeyFrame ? "key frame" : ""));
*/
}
