D3D11_1DDI_VIDEO_DECODERR_BUFFER_DESC structure

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

See also

D3D11_1DDI_AES_CTR_IV

D3D11_1DDI_ENCRYPTED_BLOCK_INFO

D3D11_DDI_VIDEO_DECODER_BUFFER_TYPE

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