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IAMVideoAccelerator::BeginFrame method

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

Syntax


HRESULT BeginFrame(
  [in]  const AMVABeginFrameInfo *pamvaBeginFrameInfo
);

Parameters

pamvaBeginFrameInfo [in]

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 codeDescription
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]

Header

Videoacc.h

Library

Strmiids.lib

See also

Error and Success Codes
How Decoders Use IAMVideoAccelerator
IAMVideoAccelerator Interface

 

 

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