/// <summary>
/// Associates a ratio value (numerator and denominator) with a key.
/// </summary>
/// <param name="attributes">A valid IMFAttributes instance.</param>
/// <param name="guidKey">Guid that identifies the value to set.</param>
/// <param name="numerator">The numerator part of the ratio.</param>
/// <param name="denominator">The denominator part of the ratio.</param>
/// <returns>If this function succeeds, it returns the S_OK member. Otherwise, it returns another HResult's member that describe the error.</returns>
/// <remarks>Numerator and denominator values are stored packed as 64-bits value.</remarks>
public static HResult SetRatio(this IMFAttributes attributes, Guid guidKey, uint numerator, uint denominator)
{
if (attributes == null)
{
throw new ArgumentNullException("attributes");
}
return(attributes.SetUINT64(guidKey, ((ulong)numerator << 32) | denominator));
}
/// <summary>
/// Associates a Ratio value with a key.
/// </summary>
/// <param name="attributes">A valid IMFAttributes instance.</param>
/// <param name="guidKey">Guid that identifies the value to set.</param>
/// <param name="width">The width part of the size.</param>
/// <param name="height">The height part of the size.</param>
/// <returns>If this function succeeds, it returns the S_OK member. Otherwise, it returns another HResult's member that describe the error.</returns>
/// <remarks>Width and height values are stored packed as 64-bits value.</remarks>
public static HResult SetSize(this IMFAttributes attributes, Guid guidKey, uint width, uint height)
{
if (attributes == null)
{
throw new ArgumentNullException("attributes");
}
return(attributes.SetUINT64(guidKey, ((ulong)width << 32) | height));
}
/// <summary>
/// Associates a UInt64 value with a key.
/// </summary>
/// <param name="attributes">A valid IMFAttributes instance.</param>
/// <param name="guidKey">Guid that identifies the value to set.</param>
/// <param name="value">New value for this key.</param>
/// <returns>If this function succeeds, it returns the S_OK member. Otherwise, it returns another HResult's member that describe the error.</returns>
public static HResult SetUINT64(this IMFAttributes attributes, Guid guidKey, ulong value)
{
if (attributes == null)
{
throw new ArgumentNullException("attributes");
}
return(attributes.SetUINT64(guidKey, unchecked ((long)value)));
}
/// <summary>
/// Associates an address location value with a key.
/// </summary>
/// <param name="attributes">A valid IMFAttributes instance.</param>
/// <param name="guidKey">Guid that identifies the value to set.</param>
/// <param name="value">New value for this key as a IntPtr.</param>
/// <returns>If this function succeeds, it returns the S_OK member. Otherwise, it returns another HResult's member that describe the error.</returns>
/// <remarks>Media Foundation attributes don't natively support pointer values. This method store them as a 64-bits unsigned integer.</remarks>
public static HResult SetPointer(this IMFAttributes attributes, Guid guidKey, IntPtr value)
{
if (attributes == null)
{
throw new ArgumentNullException("attributes");
}
return(attributes.SetUINT64(guidKey, value.ToInt64()));
}
private static IMFAttributes CreateVideoAttributes(VideoFormat videoOutput)
{
IMFAttributes videoAttributes = null;
MFHelper.MFCreateAttributes(out videoAttributes, 0);
videoAttributes.SetGUID(new Guid(Consts.MF_MT_SUBTYPE), videoOutput.Subtype);
PackedINT32 pixelAspectRatio = new PackedINT32(1, 1);
// Set the argument attributes
videoAttributes.SetUINT64(new Guid(Consts.MF_MT_FRAME_RATE), videoOutput.FrameRate.Packed);
videoAttributes.SetUINT64(new Guid(Consts.MF_MT_FRAME_SIZE), videoOutput.FrameSize.Packed);
videoAttributes.SetUINT64(new Guid(Consts.MF_MT_PIXEL_ASPECT_RATIO), pixelAspectRatio.Packed);
videoAttributes.SetUINT32(new Guid(Consts.MF_MT_INTERLACE_MODE), videoOutput.InterlaceMode);
videoAttributes.SetUINT32(new Guid(Consts.MF_MT_AVG_BITRATE), videoOutput.AvgBitRate);
return(videoAttributes);
}
public static HResult MFSetAttribute2UINT32asUINT64(
IMFAttributes pAttributes,
Guid guidKey,
int unHigh32,
int unLow32
)
{
return(pAttributes.SetUINT64(guidKey, Pack2UINT32AsUINT64(unHigh32, unLow32)));
}
public static void MFSetAttribute2UINT32asUINT64(IMFAttributes pAttributes, Guid g, int nNumerator, int nDenominator)
{
HResult hr;
long ul = nNumerator;
ul <<= 32;
ul |= (UInt32)nDenominator;
hr = pAttributes.SetUINT64(g, ul);
MFError.ThrowExceptionForHR(hr);
}
public static void MFSetAttribute2UINT32asUINT64(IMFAttributes pAttributes, Guid g, int nNumerator, int nDenominator)
{
int hr;
long ul = nNumerator;
ul <<= 32;
ul |= (UInt32)nDenominator;
hr = pAttributes.SetUINT64(g, ul);
MFError.ThrowExceptionForHR(hr);
}
public HResult SetUINT64(Guid guidKey, long unValue)
{
return(m_Attribs.SetUINT64(guidKey, unValue));
}