protected void IsMediaTypeSupported(IMFMediaType pMediaType)
{
VideoTypeBuilder pProposed = null;
bool bCompressed = false;
MFVideoInterlaceMode InterlaceMode = MFVideoInterlaceMode.Unknown;
MFVideoArea VideoCropArea;
int width = 0, height = 0;
try
{
// Helper object for reading the proposed type.
pProposed = new VideoTypeBuilder(pMediaType);
// Reject compressed media types.
pProposed.IsCompressedFormat(out bCompressed);
if (bCompressed)
{
throw new COMException("Compressed formats not supported", MFError.MF_E_INVALIDMEDIATYPE);
}
// Validate the format.
int i;
pProposed.GetFourCC(out i);
// The D3DPresentEngine checks whether the format can be used as
// the back-buffer format for the swap chains.
m_pD3DPresentEngine.CheckFormat(i);
// Reject interlaced formats.
pProposed.GetInterlaceMode(out InterlaceMode);
if (InterlaceMode != MFVideoInterlaceMode.Progressive)
{
throw new COMException("Interlaced formats not supported", MFError.MF_E_INVALIDMEDIATYPE);
}
pProposed.GetFrameDimensions(out width, out height);
// Validate the various apertures (cropping regions) against the frame size.
// Any of these apertures may be unspecified in the media type, in which case
// we ignore it. We just want to reject invalid apertures.
try
{
pProposed.GetPanScanAperture(out VideoCropArea);
ValidateVideoArea(VideoCropArea, width, height);
}
catch { }
try
{
pProposed.GetGeometricAperture(out VideoCropArea);
ValidateVideoArea(VideoCropArea, width, height);
}
catch { }
try
{
pProposed.GetMinDisplayAperture(out VideoCropArea);
ValidateVideoArea(VideoCropArea, width, height);
}
catch { }
}
finally
{
pProposed.Dispose();
//SafeRelease(pMediaType);
}
}
