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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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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

Additional resources

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