IAMVideoAccelerator::BeginFrame method

The BeginFrame method begins the processing to create a decoded picture.

Syntax

HRESULT BeginFrame(
  const AMVABeginFrameInfo *amvaBeginFrameInfo
);

Parameters

amvaBeginFrameInfo

Pointer to an AMVABeginFrameInfo structure that contains information needed to begin processing the frame.

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_PENDING
The uncompressed surface is not yet available for use. For example, it is being read for display.
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.

This method might block if no frame buffer is available.

For each call to BeginFrame, the decoder must make a corresponding call to IAMVideoAccelerator::EndFrame.

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