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DXVAHD_BLT_STATE_OUTPUT_COLOR_SPACE_DATA structure

Specifies the output color space for blit operations, when using Microsoft DirectX Video Acceleration High Definition (DXVA-HD).

Syntax


typedef struct _DXVAHD_BLT_STATE_OUTPUT_COLOR_SPACE_DATA {
  UINT Usage  :1;
  UINT RGB_Range  :1;
  UINT YCbCr_Matrix  :1;
  UINT YCbCr_xvYCC  :1;
} DXVAHD_BLT_STATE_OUTPUT_COLOR_SPACE_DATA;

Members

Usage

Specifies whether the output is intended for playback or video processing (such as editing or authoring). The device can optimize the processing based on the type. The default state value is 0 (playback).

ValueMeaning
0

Playback.

1

Video processing.

 

RGB_Range

Specifies the RGB color range. The default state value is 0 (full range).

ValueMeaning
0

Full range (0-255).

1

Limited range (16-235).

 

YCbCr_Matrix

Specifies the YCbCr transfer matrix. The default state value is 0 (BT.601).

ValueMeaning
0

ITU-R BT.601.

1

ITU-R BT.709.

 

YCbCr_xvYCC

Specifies whether the output uses conventional YCbCr or extended YCbCr (xvYCC). The default state value is zero (conventional YCbCr).

ValueMeaning
0

Conventional YCbCr.

1

Extended YCbCr (xvYCC).

 

Remarks

The RGB_Range member applies to RGB output, while the YCbCr_Matrix and YCbCr_xvYCC members apply to YCbCr (YUV) output. If the device performs color-space conversion on the background color, it uses the values that apply to both color spaces.

Extended YCbCr can be used with either transfer matrix. Extended YCbCr does not change the black point or white point—the black point is still 16 and the white point is still 235. However, extended YCbCr explicitly allows blacker-than-black values in the range 1–15, and whiter-than-white values in the range 236–254. When extended YCbCr is used, the driver should not clip the luma values to the nominal 16–235 range.

If the device supports extended YCbCr, it sets the DXVAHD_DEVICE_CAPS_xvYCC capability flag in the DeviceCaps member of the DXVAHD_VPDEVCAPS structure. Otherwise, the device ignores the value of the YCbCr_xvYCC member and treats all YCbCr output as conventional YCbCr. To get the device's capabilities, call IDXVAHD_Device::GetVideoProcessorDeviceCaps.

If the output format is a wide-gamut RGB format, output might fall outside the nominal [0...1] range of sRGB. This is particularly true if one or more input streams use extended YCbCr.

Examples


HRESULT DXVAHD_SetOutputColorSpace(
    IDXVAHD_VideoProcessor *pVP,
    BOOL bPlayback,     // TRUE = playback, FALSE = video processing
    UINT RGB_Range,     // 0 = 0-255, 1 = 16-235
    UINT YCbCr_Matrix,  // 0 = BT.601, 1 = BT.709
    UINT YCbCr_xvYCC    // 0 = Conventional YCbCr, 1 = xvYCC
    )
{
    DXVAHD_BLT_STATE_OUTPUT_COLOR_SPACE_DATA data =
    {
        bPlayback ? 0 : 1,
        RGB_Range ? 1 : 0,
        YCbCr_Matrix ? 1 : 0,
        YCbCr_xvYCC ? 1 : 0
    };

    HRESULT hr = pVP->SetVideoProcessBltState(
        DXVAHD_BLT_STATE_OUTPUT_COLOR_SPACE,
        sizeof(data),
        &data
        );

    return hr;
}


Requirements

Minimum supported client

Windows 7 [desktop apps only]

Minimum supported server

Windows Server 2008 R2 [desktop apps only]

Header

Dxvahd.h

See also

DXVA-HD
Media Foundation Structures
DXVAHD_BLT_STATE
IDXVAHD_VideoProcessor::SetVideoProcessBltState

 

 

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