MFVideoChromaSubsampling enumeration

Contains flags that define the chroma encoding scheme for Y'Cb'Cr' data.

Syntax

typedef enum _MFVideoChromaSubsampling { 
  MFVideoChromaSubsampling_Unknown                         = 0,
  MFVideoChromaSubsampling_ProgressiveChroma               = 0x8,
  MFVideoChromaSubsampling_Horizontally_Cosited            = 0x4,
  MFVideoChromaSubsampling_Vertically_Cosited              = 0x2,
  MFVideoChromaSubsampling_Vertically_AlignedChromaPlanes  = 0x1,
  MFVideoChromaSubsampling_MPEG2                           = 
    MFVideoChromaSubsampling_Horizontally_Cosited | 
    MFVideoChromaSubsampling_Vertically_AlignedChromaPlanes,
  MFVideoChromaSubsampling_MPEG1                           = 
    MFVideoChromaSubsampling_Vertically_AlignedChromaPlanes,
  MFVideoChromaSubsampling_DV_PAL                          = 
    MFVideoChromaSubsampling_Horizontally_Cosited | 
    MFVideoChromaSubsampling_Vertically_Cosited,
  MFVideoChromaSubsampling_Cosited                         = 
    MFVideoChromaSubsampling_Horizontally_Cosited | 
    MFVideoChromaSubsampling_Vertically_Cosited | 
    MFVideoChromaSubsampling_Vertically_AlignedChromaPlanes,
  MFVideoChromaSubsampling_Last                            = MFVideoChromaSubsampling_Cosited + 1,
  MFVideoChromaSubsampling_ForceDWORD                      = 0x7FFFFFFF
} MFVideoChromaSubsampling;

Constants

MFVideoChromaSubsampling_Unknown

Unknown encoding scheme.

MFVideoChromaSubsampling_ProgressiveChroma

Chroma should be reconstructed as if the underlying video was progressive content, rather than skipping fields or applying chroma filtering to minimize artifacts from reconstructing 4:2:0 interlaced chroma.

MFVideoChromaSubsampling_Horizontally_Cosited

Chroma samples are aligned horizontally with the luma samples, or with multiples of the luma samples. If this flag is not set, chroma samples are located 1/2 pixel to the right of the corresponding luma sample.

MFVideoChromaSubsampling_Vertically_Cosited

Chroma samples are aligned vertically with the luma samples, or with multiples of the luma samples. If this flag is not set, chroma samples are located 1/2 pixel down from the corresponding luma sample.

MFVideoChromaSubsampling_Vertically_AlignedChromaPlanes

The U and V planes are aligned vertically. If this flag is not set, the chroma planes are assumed to be out of phase by 1/2 chroma sample, alternating between a line of U followed by a line of V.

MFVideoChromaSubsampling_MPEG2

Specifies the chroma encoding scheme for MPEG-2 video. Chroma samples are aligned horizontally with the luma samples, but are not aligned vertically. The U and V planes are aligned vertically.

MFVideoChromaSubsampling_MPEG1

Specifies the chroma encoding scheme for MPEG-1 video.

MFVideoChromaSubsampling_DV_PAL

Specifies the chroma encoding scheme for PAL DV video.

MFVideoChromaSubsampling_Cosited

Chroma samples are aligned vertically and horizontally with the luma samples. YUV formats such as 4:4:4, 4:2:2, and 4:1:1 are always cosited in both directions and should use this flag.

MFVideoChromaSubsampling_Last

Reserved.

MFVideoChromaSubsampling_ForceDWORD

Reserved. This member forces the enumeration type to compile as a DWORD value.

Remarks

These flags are used with the MF_MT_VIDEO_CHROMA_SITING attribute.

For more information about these values, see the remarks for the DXVA2_VideoChromaSubSampling enumeration, which is the DirectX Video Acceleration (DXVA) equivalent of this enumeration.

Requirements

See also

Media Foundation Enumerations

Video Media Types

Extended Color Information