D3D11_1DDI_VIDEO_DECODER_BUFFER_DESC structure (d3d10umddi.h)
Describes a compressed buffer for Microsoft DirectX Video Acceleration (DXVA) decoding.
Syntax
typedef struct D3D11_1DDI_VIDEO_DECODERR_BUFFER_DESC {
D3D10DDI_HRESOURCE hResource;
D3D11_1DDI_VIDEO_DECODER_BUFFER_TYPE BufferType;
UINT BufferIndex;
UINT DataOffset;
UINT DataSize;
UINT FirstMBaddress;
UINT NumMBsInBuffer;
UINT Width;
UINT Height;
UINT Stride;
UINT ReservedBits;
void *pIV;
UINT IVSize;
BOOL PartialEncryption;
D3D11_1DDI_ENCRYPTED_BLOCK_INFO EncryptedBlockInfo;
} D3D11_1DDI_VIDEO_DECODER_BUFFER_DESC;
Members
hResource
A handle to the resource that will receive the decrypted and decode frame buffers.
BufferType
The type of buffer, specified as a constant value of the D3D11_DDI_VIDEO_DECODER_BUFFER_TYPE enumeration.
In D3d10umddi.h, D3D11_DDI_VIDEO_DECODER_BUFFER_TYPE and D3D11_1DDI_VIDEO_DECODER_BUFFER_TYPE are defined as the same type.
BufferIndex
Reserved for system use.
DataOffset
The offset of the relevant data from the beginning of the buffer, in bytes. This value must be zero.
DataSize
The offset of the relevant data from the beginning of the buffer, in bytes. This value must be zero.
FirstMBaddress
The macroblock address of the first macroblock in the buffer. The macroblock address is given in raster scan order.
NumMBsInBuffer
The number of macroblocks of data in the buffer. This count includes skipped macroblocks.
Width
Reserved for system use. Set to zero.
Height
Reserved for system use. Set to zero.
Stride
Reserved for system use. Set to zero.
ReservedBits
Reserved for system use. Set to zero.
pIV
A pointer to a D3D11_1DDI_AES_CTR_IV structure that contains an initialization vector (IV) for the frame buffer data that was encrypted by using the 128-bit Advanced Encryption Standard CTR mode (AES-CTR) block cipher encryption algorithm.
If the decode buffer does not contain any encrypted data, set pIV to NULL.
IVSize
The size of the buffer specified in the pIV member. If pIV is NULL, set this member to zero.
PartialEncryption
If TRUE, the video surfaces are partially encrypted.
EncryptedBlockInfo
A D3D11_1DDI_ENCRYPTED_BLOCK_INFO structure that specifies which bytes of the surface are encrypted.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 8 |
| Minimum supported server | Windows Server 2012 |
| Header | d3d10umddi.h (include D3d10umddi.h) |