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DXVA_NominalRange enumeration (dxva.h)

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The DXVA_NominalRange enumeration type contains enumerators that identify whether sample data includes headroom (values beyond 1.0 white) and toeroom (superblacks below the reference 0.0 black).

Syntax

typedef enum _DXVA_NominalRange {
  DXVA_NominalRangeShift,
  DXVA_NominalRangeMask,
  DXVA_NominalRange_Unknown,
  DXVA_NominalRange_Normal,
  DXVA_NominalRange_Wide,
  DXVA_NominalRange_0_255,
  DXVA_NominalRange_16_235,
  DXVA_NominalRange_48_208
} DXVA_NominalRange;

Constants

 
DXVA_NominalRangeShift
Specifies to shift bits by 12 positions (DXVA_ExtColorData_ShiftBase + 4, or 8 + 4).
DXVA_NominalRangeMask
Specifies the nominal range mask. 3 (0x00007000) bits of a DWORD can be used to specify nominal range.
DXVA_NominalRange_Unknown
Specifies that the nominal range is not specified.
DXVA_NominalRange_Normal
Specifies that normalized chroma [0..1] maps to [0..255] for 8-bit or [0..1023] for 10-bit.
DXVA_NominalRange_Wide
Specifies that normalized chroma [0..1] maps to [16..235] for 8-bit or [64..940] for 10-bit.
DXVA_NominalRange_0_255
Specifies that normalized chroma [0..1] maps to [0..255] for 8-bit or [0..1023] for 10-bit.
DXVA_NominalRange_16_235
Specifies that normalized chroma [0..1] maps to [16..235] for 8-bit or [64..940] for 10-bit.
DXVA_NominalRange_48_208
Specifies that normalized chroma [0..1] maps to [48..208] for 8-bit or [192..832] for 10-bit.

Remarks

One of the enumerators of DXVA_NominalRange can be specified in the NominalRange member of the DXVA_ExtendedFormat structure.

Wide gamut R'G'B' (that is, blackpoint at 16,16,16 and whitepoint at 235,235,235) must be differentiated from normal sRGB.

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)

See also

DXVA_ExtendedFormat