IAMVideoAccelerator::DisplayFrame method (videoacc.h)

Artigo
4/26/2023

[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 DisplayFrame method causes the video renderer to display a decoded frame.

Syntax

HRESULT DisplayFrame(
  [in] DWORD        dwFlipToIndex,
  [in] IMediaSample *pMediaSample
);

Parameters

[in] dwFlipToIndex

The surface index of the decoded frame to display.

[in] pMediaSample

Pointer to the IMediaSample interface of a media sample. This sample does not contain a video frame, but is used to specify the time stamp and any sample flags. (For more information about sample flags, see AM_SAMPLE2_PROPERTIES.

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 method blocks until the video renderer finishes displaying the video frame.

The video decoder calls this method after calling IAMVideoAccelerator::EndFrame for the surface whose index is given in dwFlipToIndex. The index value must match the value of AMVABeginFrameInfo.dwDestSurfaceIndex in a previous call to IAMVideoAccelerator::BeginFrame.

Requirements

Requirement	Value
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

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