DXVA_VideoTransferFunction enumeration (dxva.h)
The DXVA_VideoTransferFunction enumeration type contains enumerators that identify the conversion function from R'G'B' to RGB.
Syntax
typedef enum _DXVA_VideoTransferFunction {
DXVA_VideoTransFuncShift,
DXVA_VideoTransFuncMask,
DXVA_VideoTransFunc_Unknown,
DXVA_VideoTransFunc_10,
DXVA_VideoTransFunc_18,
DXVA_VideoTransFunc_20,
DXVA_VideoTransFunc_22,
DXVA_VideoTransFunc_22_709,
DXVA_VideoTransFunc_22_240M,
DXVA_VideoTransFunc_22_8bit_sRGB,
DXVA_VideoTransFunc_28
} DXVA_VideoTransferFunction;
Constants
DXVA_VideoTransFuncShift Specifies to shift bits by 27 positions (DXVA_ExtColorData_ShiftBase + 19, or 8 + 19). |
DXVA_VideoTransFuncMask Specifies the video transfer function mask. 5 (0xF8000000) bits of a DWORD can be used to specify the video transfer function. |
DXVA_VideoTransFunc_Unknown Specifies that the video transfer function is not specified. The default is 22_8bit_sRGB if required for a computation. |
DXVA_VideoTransFunc_10 Specifies linear RGB conversion (corresponds to gamma = 1.0). |
DXVA_VideoTransFunc_18 Specifies true 1.8 gamma. That is, L' = pow(L, 1/gamma) for L=0..1. |
DXVA_VideoTransFunc_20 Specifies true 2.0 gamma. That is, L' = pow(L, 1/gamma) for L=0..1. |
DXVA_VideoTransFunc_22 |
DXVA_VideoTransFunc_22_709 |
DXVA_VideoTransFunc_22_240M |
DXVA_VideoTransFunc_22_8bit_sRGB Specifies gamma 2.4 curve with a linear range in the low range, which makes it match an accurate 2.2 gamma 8 bit curve. |
DXVA_VideoTransFunc_28 Specifies true 2.8 gamma. That is, L' = pow(L, 1/gamma) for L=0..1. |
Remarks
One of the enumerators of DXVA_VideoTransferFunction can be specified in the VideoTransferFunction member of the DXVA_ExtendedFormat structure.
DXVA_VideoTransferFunction corresponds to the gamma function of the data. Some transfer functions have corrections to account for 8 bit integer quantization effects.
Requirements
Requirement | Value |
---|---|
Minimum supported client | This enumeration type applies only to Windows Server 2003 with SP1 and later, and Windows XP with SP2 and later. |
Header | dxva.h (include Dxva.h) |