/// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
/// <summary>
/// Validates a media type for this transform. Since both input and output types must be
/// the same, they both call this routine.
/// </summary>
/// <param name="pmt">The media type to validate.</param>
/// <returns>S_Ok or MF_E_INVALIDTYPE.</returns>
/// <history>
/// 01 Nov 18 Cynic - Ported over
/// </history>
private HResult OnCheckMediaType(IMFMediaType pmt)
{
int interlace;
HResult hr = HResult.S_OK;
// see if the media type is one of our list of acceptable subtypes
hr = TantaWMFUtils.CheckMediaType(pmt, MFMediaType.Video, m_MediaSubtypes);
if (hr != HResult.S_OK)
{
throw new Exception("OnCheckMediaType call to TantaWMFUtils.CheckMediaType failed. Err=" + hr.ToString());
}
// Video must be progressive frames. Set this now
m_MightBeInterlaced = false;
// get the interlace mode
hr = pmt.GetUINT32(MFAttributesClsid.MF_MT_INTERLACE_MODE, out interlace);
if (hr != HResult.S_OK)
{
throw new Exception("OnCheckMediaType call to getting the interlace mode failed. Err=" + hr.ToString());
}
// set it now
MFVideoInterlaceMode im = (MFVideoInterlaceMode)interlace;
// Mostly we only accept Progressive.
if (im == MFVideoInterlaceMode.Progressive)
{
return(HResult.S_OK);
}
// If the type MIGHT be interlaced, we'll accept it.
if (im == MFVideoInterlaceMode.MixedInterlaceOrProgressive)
{
// But we will check to see if any samples actually
// are interlaced, and reject them.
m_MightBeInterlaced = true;
return(HResult.S_OK);
}
// not a valid option
return(HResult.MF_E_INVALIDTYPE);
}
/// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
/// <summary>
/// Validates a media type for this transform. Since both input and output types must be
/// the same, they both call this routine.
/// </summary>
/// <param name="pmt">The media type to validate.</param>
/// <returns>S_Ok or MF_E_INVALIDTYPE.</returns>
/// <history>
/// 01 Nov 18 Cynic - Ported over
/// </history>
private HResult OnCheckMediaType(IMFMediaType pmt)
{
HResult hr;
// Check the Major and Subtype
hr = TantaWMFUtils.CheckMediaType(pmt, MFMediaType.Video, m_MediaSubtypes);
if (Succeeded(hr))
{
int interlace;
// Video must be progressive frames.
m_MightBeInterlaced = false;
MFError throwonhr = pmt.GetUINT32(MFAttributesClsid.MF_MT_INTERLACE_MODE, out interlace);
MFVideoInterlaceMode im = (MFVideoInterlaceMode)interlace;
// Mostly we only accept Progressive.
if (im != MFVideoInterlaceMode.Progressive)
{
// If the type MIGHT be interlaced, we'll accept it.
if (im != MFVideoInterlaceMode.MixedInterlaceOrProgressive)
{
hr = HResult.MF_E_INVALIDTYPE;
}
else
{
// But we will check to see if any samples actually
// are interlaced, and reject them.
m_MightBeInterlaced = true;
}
}
}
return(hr);
}
