IAMVideoAccelerator::Execute method

The Execute method performs a DirectX Video Acceleration (DXVA) decoding operation.

Syntax

HRESULT Execute(
  DWORD                dwFunction,
  LPVOID               lpPrivateInputData,
  DWORD                cbPrivateInputData,
  LPVOID               lpPrivateOutputDat,
  DWORD                cbPrivateOutputData,
  DWORD                dwNumBuffers,
  const AMVABUFFERINFO *pamvaBufferInfo
);

Parameters

dwFunction

Contains one or more DXVA function numbers.

lpPrivateInputData

Pointer to input data for the decoding operation. The meaning of this data depends on the surface type and function number. For details, refer to the DXVA 1.0 specification.

cbPrivateInputData

Size of the input data, in bytes.

lpPrivateOutputDat

Pointer to a buffer where the video accelerator will write output data.

cbPrivateOutputData

Size of the lpPrivateOutputData buffer, in bytes.

dwNumBuffers

Number of elements in the pamvaBufferInfo array.

pamvaBufferInfo

Pointer to an array of AMVABUFFERINFO structures.

Return value

Returns an HRESULT value that depends on the implementation of the interface. HRESULT can include one of the following standard constants, or other values not listed.

Return code Description
E_FAIL
Failure.
E_INVALIDARG
Argument is invalid.
E_NOTIMPL
Method is not supported.
E_POINTER
NULL pointer argument.
S_OK
Success.
VFW_E_INVALIDSUBTYPE
The decoder did not use a DXVA decoding type when it connected to the video renderer.
VFW_E_NOT_CONNECTED
The pins on the decoder and video renderer filters are not connected.

Remarks

If the filter's pins are not connected, the method returns VFW_E_NOT_CONNECTED.

The associated buffer list is passed along with a function number (defaulting to zero) and any necessary private data describing the decompression operation. For example, decompressed reference frame information is passed in the buffer list. The buffer list order is important and is defined by the particular decompression operation being performed.

Private data can be passed to and from a driver.

Requirements

   
Minimum supported client Windows 2000 Professional [desktop apps only]
Minimum supported server Windows 2000 Server [desktop apps only]
Target Platform Windows
Header videoacc.h
Library Strmiids.lib

See also

Error and Success Codes

How Decoders Use IAMVideoAccelerator

IAMVideoAccelerator Interface