// Formats
protected void CreateOptimalVideoType(IMFMediaType pProposed, out IMFMediaType ppOptimal)
{
try
{
MFRect rcOutput;
MFVideoArea displayArea;
IMFMediaType pOptimalType = null;
// Create the helper object to manipulate the optimal type.
VideoTypeBuilder pmtOptimal = new VideoTypeBuilder();
// Clone the proposed type.
pmtOptimal.CopyFrom(pProposed);
// Modify the new type.
// For purposes of this SDK sample, we assume
// 1) The monitor's pixels are square.
// 2) The presenter always preserves the pixel aspect ratio.
// Set the pixel aspect ratio (PAR) to 1:1 (see assumption #1, above)
pmtOptimal.SetPixelAspectRatio(1, 1);
// Get the output rectangle.
rcOutput = m_pD3DPresentEngine.GetDestinationRect();
if (rcOutput.IsEmpty())
{
// Calculate the output rectangle based on the media type.
CalculateOutputRectangle(pProposed, out rcOutput);
}
// Set the extended color information: Use BT.709
pmtOptimal.SetYUVMatrix(MFVideoTransferMatrix.BT709);
pmtOptimal.SetTransferFunction(MFVideoTransferFunction.Func709);
pmtOptimal.SetVideoPrimaries(MFVideoPrimaries.BT709);
pmtOptimal.SetVideoNominalRange(MFNominalRange.MFNominalRange_16_235);
pmtOptimal.SetVideoLighting(MFVideoLighting.Dim);
// Set the target rect dimensions.
pmtOptimal.SetFrameDimensions(rcOutput.right, rcOutput.bottom);
// Set the geometric aperture, and disable pan/scan.
displayArea = new MFVideoArea(0, 0, rcOutput.right, rcOutput.bottom);
pmtOptimal.SetPanScanEnabled(false);
pmtOptimal.SetGeometricAperture(displayArea);
// Set the pan/scan aperture and the minimum display aperture. We don't care
// about them per se, but the mixer will reject the type if these exceed the
// frame dimentions.
pmtOptimal.SetPanScanAperture(displayArea);
pmtOptimal.SetMinDisplayAperture(displayArea);
// Return the pointer to the caller.
pmtOptimal.GetMediaType(out pOptimalType);
pmtOptimal.Dispose();
ppOptimal = pOptimalType;
}
finally
{
//SafeRelease(pOptimalType);
//SafeRelease(pmtOptimal);
}
}
protected void ValidateVideoArea(MFVideoArea area, int width, int height)
{
float fOffsetX = area.OffsetX.GetOffset();
float fOffsetY = area.OffsetY.GetOffset();
if (((int)fOffsetX + area.Area.Width > width) ||
((int)fOffsetY + area.Area.Height > height))
{
throw new COMException("ValidateVideoArea", MFError.MF_E_INVALIDMEDIATYPE);
}
}
// Sets the the region that contains the valid portion of the signal.
public void SetMinDisplayAperture(MFVideoArea area)
{
Utils.MFSetBlob(GetMediaType(), MFAttributesClsid.MF_MT_MINIMUM_DISPLAY_APERTURE, area);
}
// Sets the 4×3 region of video that should be displayed in pan/scan mode.
public void SetPanScanAperture(MFVideoArea area)
{
Utils.MFSetBlob(GetMediaType(), MFAttributesClsid.MF_MT_PAN_SCAN_APERTURE, area);
}
// Sets the geometric aperture.
public void SetGeometricAperture(MFVideoArea area)
{
Utils.MFSetBlob(GetMediaType(), MFAttributesClsid.MF_MT_GEOMETRIC_APERTURE, area);
}
// Returns (in this order)
// 1. The pan/scan region, only if pan/scan mode is enabled.
// 2. The geometric aperture.
// 3. The entire video area.
public void GetVideoDisplayArea(out MFVideoArea pArea)
{
int hr = 0;
bool bPanScan = false;
int width = 0, height = 0;
pArea = new MFVideoArea();
bPanScan = Utils.MFGetAttributeUINT32(GetMediaType(), MFAttributesClsid.MF_MT_PAN_SCAN_ENABLED, 0) != 0;
// In pan/scan mode, try to get the pan/scan region.
if (bPanScan)
{
try
{
Utils.MFGetBlob(GetMediaType(), MFAttributesClsid.MF_MT_PAN_SCAN_APERTURE, pArea);
}
catch (Exception e)
{
hr = Marshal.GetHRForException(e);
}
}
// If not in pan/scan mode, or there is not pan/scan region, get the geometric aperture.
if (!bPanScan || hr == MFError.MF_E_ATTRIBUTENOTFOUND)
{
try
{
Utils.MFGetBlob(GetMediaType(), MFAttributesClsid.MF_MT_GEOMETRIC_APERTURE, pArea);
hr = 0;
}
catch (Exception e)
{
hr = Marshal.GetHRForException(e);
}
// Default: Use the entire video area.
if (hr == MFError.MF_E_ATTRIBUTENOTFOUND)
{
Utils.MFGetAttribute2UINT32asUINT64(GetMediaType(), MFAttributesClsid.MF_MT_FRAME_SIZE, out width, out height);
pArea.MakeArea(0, 0, width, height);
}
}
}
// Queries the 4×3 region of video that should be displayed in pan/scan mode.
public void GetPanScanAperture(out MFVideoArea pArea)
{
pArea = new MFVideoArea();
Utils.MFGetBlob(GetMediaType(), MFAttributesClsid.MF_MT_PAN_SCAN_APERTURE, pArea);
}
// Retrieves the region that contains the valid portion of the signal.
public void GetMinDisplayAperture(out MFVideoArea pArea)
{
pArea = new MFVideoArea();
Utils.MFGetBlob(GetMediaType(), MFAttributesClsid.MF_MT_MINIMUM_DISPLAY_APERTURE, pArea);
}
// Queries the geometric aperture.
public void GetGeometricAperture(out MFVideoArea pArea)
{
pArea = new MFVideoArea();
Utils.MFGetBlob(GetMediaType(), MFAttributesClsid.MF_MT_GEOMETRIC_APERTURE, pArea);
}