MFVideoTransferFunction enumeration (mfobjects.h)

2024-02-22

Specifies the conversion function from linear RGB to non-linear RGB (R'G'B').

Syntax

typedef enum _MFVideoTransferFunction {
  MFVideoTransFunc_Unknown = 0,
  MFVideoTransFunc_10 = 1,
  MFVideoTransFunc_18 = 2,
  MFVideoTransFunc_20 = 3,
  MFVideoTransFunc_22 = 4,
  MFVideoTransFunc_709 = 5,
  MFVideoTransFunc_240M = 6,
  MFVideoTransFunc_sRGB = 7,
  MFVideoTransFunc_28 = 8,
  MFVideoTransFunc_Log_100 = 9,
  MFVideoTransFunc_Log_316 = 10,
  MFVideoTransFunc_709_sym = 11,
  MFVideoTransFunc_2020_const = 12,
  MFVideoTransFunc_2020 = 13,
  MFVideoTransFunc_26 = 14,
  MFVideoTransFunc_2084 = 15,
  MFVideoTransFunc_HLG = 16,
  MFVideoTransFunc_10_rel = 17,
  MFVideoTransFunc_BT1361_ECG = 18,
  MFVideoTransFunc_SMPTE428 = 19,
  MFVideoTransFunc_Last,
  MFVideoTransFunc_ForceDWORD = 0x7fffffff
} MFVideoTransferFunction;

Constants


`MFVideoTransFunc_Unknown` Value: 0 Unknown. Treat as MFVideoTransFunc_709.
`MFVideoTransFunc_10` Value: 1 Linear RGB (gamma = 1.0).
`MFVideoTransFunc_18` Value: 2 True 1.8 gamma, L' = L^1/1.8.
`MFVideoTransFunc_20` Value: 3 True 2.0 gamma, L' = L^1/2.0.
`MFVideoTransFunc_22` Value: 4 True 2.2 gamma, L' = L^1/2.2. This transfer function is used in ITU-R BT.470-2 System M (NTSC).
`MFVideoTransFunc_709` Value: 5 ITU-R BT.709 transfer function. Gamma 2.2 curve with a linear segment in the lower range. This transfer function is used in BT.709, BT.601, SMPTE 296M, SMPTE 170M, BT.470, and SPMTE 274M. In addition BT-1361 uses this function within the range [0...1].
`MFVideoTransFunc_240M` Value: 6 SPMTE 240M transfer function. Gamma 2.2 curve with a linear segment in the lower range.
`MFVideoTransFunc_sRGB` Value: 7 sRGB transfer function. Gamma 2.4 curve with a linear segment in the lower range.
`MFVideoTransFunc_28` Value: 8 True 2.8 gamma. L' = L^1/2.8. This transfer function is used in ITU-R BT.470-2 System B, G (PAL).
`MFVideoTransFunc_Log_100` Value: 9 Logarithmic transfer (100:1 range); for example, as used in H.264 video. Note Requires Windows 7 or later.
`MFVideoTransFunc_Log_316` Value: 10 Logarithmic transfer (316.22777:1 range); for example, as used in H.264 video. Note Requires Windows 7 or later.
`MFVideoTransFunc_709_sym` Value: 11 Symmetric ITU-R BT.709. Note Requires Windows 7 or later.
`MFVideoTransFunc_2020_const` Value: 12 Constant luminance ITU-R BT.2020. See Recommendation ITU-R BT.2020-2. Note Requires Windows 8 or later.
`MFVideoTransFunc_2020` Value: 13 Non-constant luminance ITU-R BT.2020. See Recommendation ITU-R BT.2020-2. Note Requires Windows 8 or later.
`MFVideoTransFunc_26` Value: 14 True 2.6 gamma, L’=L^1/2.6 Note Requires Windows 8 or later.
`MFVideoTransFunc_2084` Value: 15 SMPTE ST.2084 also known as PQ. Also defined in ITU-R BT.2100 Note Requires Windows 10, version 1703 or later.
`MFVideoTransFunc_HLG` Value: 16 Hybrid Log-Gamma, ARIB STD-B67 Note Requires Windows 10, version 1703 or later.
`MFVideoTransFunc_10_rel` Value: 17 No gamma, display referred (relative).
`MFVideoTransFunc_BT1361_ECG` Value: 18 The transfer function Extended Color Gamut video, as defined by ITU-R BT.1361.
`MFVideoTransFunc_SMPTE428` Value: 19 Video transfer function defined in SMPTE ST 428-1.
`MFVideoTransFunc_Last` Reserved.
`MFVideoTransFunc_ForceDWORD` Value: 0x7fffffff Reserved. This member forces the enumeration type to compile as a DWORD value.

Remarks

These flags are used with the MF_MT_TRANSFER_FUNCTION attribute.

For more information about these values, see the remarks for the DXVA2_VideoTransferFunction enumeration, which is the DirectX Video Acceleration (DXVA) equivalent of this enumeration.

Requirements

Requirement	Value
Minimum supported client	Windows Vista [desktop apps only]
Minimum supported server	Windows Server 2008 [desktop apps only]
Header	mfobjects.h (include Mfidl.h)

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