AMVABUFFERINFO structure (amva.h)

[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

The AMVABUFFERINFO structure specifies a buffer for the IAMVideoAccelerator::Execute method.

Syntax

typedef struct _tag_AMVABUFFERINFO {
  DWORD dwTypeIndex;
  DWORD dwBufferIndex;
  DWORD dwDataOffset;
  DWORD dwDataSize;
} AMVABUFFERINFO, *LPAMVABUFFERINFO;

Members

dwTypeIndex

Type of buffer. The following buffer types are defined.

Value	Meaning
DXVA_ALPHA_BLEND_COMBINATION_BUFFER	Alpha blend combination buffer.
DXVA_AYUV_BUFFER	AYUV alpha blending sample buffer.
DXVA_BITSTREAM_DATA_BUFFER	Raw bitstream data buffer.
DXVA_DCCMD_SURFACE_BUFFER	Display control command (DCCMD) data buffer.
DXVA_DEBLOCKING_CONTROL_BUFFER	Deblocking Filter control command buffer.
DXVA_DPXD_SURFACE_BUFFER	Decoded PXD (DPXD) alpha blending surface buffer.
DXVA_HIGHLIGHT_BUFFER	Highlight data buffers.
DXVA_IA44_SURFACE_BUFFER	IA44 alpha blending sample buffer.
DXVA_INVERSE_QUANTIZATION_MATRIX_BUFFER	Inverse quantization matrix buffer.
DXVA_MACROBLOCK_CONTROL_BUFFER	Macroblock control command buffer.
DXVA_PICTURE_DECODE_BUFFER	Picture parameters buffer.
DXVA_PICTURE_RESAMPLE_BUFFER	Alpha blend combination buffer.
DXVA_READ_BACK_BUFFER	Read-back command buffers containing commands to read macroblocks of the resulting picture back to the host.
DXVA_RESIDUAL_DIFFERENCE_BUFFER	Residual difference block data buffer.
DXVA_SLICE_CONTROL_BUFFER	Slice control buffer.

 

For complete descriptions of these buffer types, refer to the DirectX Video Acceleration 1.0 specification.

dwBufferIndex

Buffer index.

dwDataOffset

The offset of the relevant data from the beginning of the buffer.

dwDataSize

Size of the relevant data in the buffer, in bytes.

Requirements

Requirement	Value
Minimum supported client	Windows 2000 Professional [desktop apps only]
Minimum supported server	Windows 2000 Server [desktop apps only]
Header	amva.h (include Videoacc.h)

See also

DirectShow Structures

IAMVideoAccelerator::Execute