DXVADDI_DECODEBUFFERINFO - NtDoc
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// d3dumddi.h
typedef struct _DXVADDI_DECODEBUFFERINFO {
[out] D3DDDIFORMAT CompressedBufferType;
[out] UINT CreationWidth;
[out] UINT CreationHeight;
[out] D3DDDI_POOL CreationPool;
} DXVADDI_DECODEBUFFERINFO;
View the official Windows Driver Kit DDI referenceNo description available.
The DXVADDI_DECODEBUFFERINFO structure describes information about a particular type of compressed buffer that is required for a video decoding scenario.
CompressedBufferType [out]A D3DDDIFORMAT-typed value that indicates the pixel format of the buffer.
CreationWidth [out]The width of the data in the buffer as the number of units of bits. For example, AYUV data is specified in 32-bit units, IA44/AI44 data is specified in 8-bit units, and DPXD data is specified in 2-bit units.
The driver must assign a value to CreationWidth that is a multiple of 2 and does not exceed 65535.
CreationHeight [out]The height of the data in the buffer as the number of units of bits. For example, AYUV data is specified in 32-bit units, IA44/AI44 data is specified in 8-bit units, and DPXD data is specified in 2-bit units.
The driver must assign a value to CreationHeight that does not exceed 65535.
CreationPool [out]A D3DDDI_POOL-typed value that indicates the type of memory that the buffer exists in.
A pointer to the DXVADDI_DECODEINPUT structure is specified in the pInfo member of the D3DDDIARG_GETCAPS structure--along with a D3DDDICAPS_GETDECODECOMPRESSEDBUFFERINFO value in the Type member of D3DDDIARG_GETCAPS--in a call to the user-mode display driver's GetCaps function to retrieve information about the types of compressed buffers that are required to accelerate a particular DirectX VA video decode type. The information about the types of compressed buffers is returned in an array of DXVADDI_DECODEBUFFERINFO structures through the pData member of D3DDDIARG_GETCAPS.