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Windows Driver Kit DDI reference (nc-d3d10umddi-pfnd3dwddm2_1ddi_videoprocessorsetstreamhdrmetadata)

PFND3DWDDM2_1DDI_VIDEOPROCESSORSETSTREAMHDRMETADATA callback function

Description

Implemented by the client driver to set stream HDR metadata to optimize video for display. This callback sets the maximum number of nits for which the content was authored.

Parameters

`hDevice`

A handle to the display device (graphics context).

`hVideoProcessor`

A handle to the video processor object.

`StreamIndex`

Indicates the input stream.

`Type`

Indicates the type of the HDR metadata provided.

`Size`

Indicates the type of the HDR metadata provided.

For D3DDDI_HDR_METADATA_TYPE_NONE, the size should be 0.
For D3DDDI_HDR_METADATA_TYPE_HDR10, the size is sizeof(D3DDDI_HDR_METADATA_HDR10).

`pMetaData`

Points to a structure containing the HDR metadata.

For D3DDDI_HDR_METADATA_TYPE_NONE, this should be NULL.
For D3DDDI_HDR_METADATA_TYPE_HDR10, this is a pointer to a DD3DDDI_HDR_METADATA_HDR10 structure.

Prototype

//Declaration

PFND3DWDDM2_1DDI_VIDEOPROCESSORSETSTREAMHDRMETADATA Pfnd3dwddm21DdiVideoprocessorsetstreamhdrmetadata;

// Definition

VOID Pfnd3dwddm21DdiVideoprocessorsetstreamhdrmetadata
(
    D3D10DDI_HDEVICE hDevice
    D3D11_1DDI_HVIDEOPROCESSOR hVideoProcessor
    UINT StreamIndex
    D3DDDI_HDR_METADATA_TYPE Type
    UINT Size
    CONST VOID *pMetaData
)
{...}

Remarks

When processing an HDR stream, the driver may use this brightness information to tone map the video content to optimize it for the output display.

PFND3DWDDM2_1DDI_VIDEOPROCESSORSETSTREAMHDRMETADATA - NtDoc