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MFCreateVideoSampleAllocator callback function (evr.h)

  • Articolo

[The component described on this page, Enhanced Video Renderer, is a legacy feature. It has been superseded by the Simple Video Renderer (SVR) exposed through the MediaPlayer and IMFMediaEngine components. To play video content you should send data into one of these components and allow them to instantiate the new video renderer. These components have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer or the lower level IMFMediaEngine APIs to play video media in Windows instead of the EVR, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

Creates an object that allocates video samples.

Syntax

MFCreateVideoSampleAllocator Mfcreatevideosampleallocator;

EVRPUBLIC Mfcreatevideosampleallocator(
  [in]  REFIID riid,
  [out] void **ppSampleAllocator
)
{...}

Parameters

[in] riid

The identifier of the interface to retrieve. Specify one of the following values:

Value Meaning
IID_IUnknown
 Retrieve an IUnknown pointer.
IID_IMFVideoSampleAllocator
 Retrieve an IMFVideoSampleAllocator pointer.
IID_IMFVideoSampleAllocatorCallback
 Retrieve an IMFVideoSampleAllocatorCallback pointer.

[out] ppSampleAllocator

Receives a pointer to the requested interface. The caller must release the interface.

Return value

If the function succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.

Requirements

Requirement Value
Minimum supported client Windows Vista [desktop apps only]
Minimum supported server Windows Server 2008 [desktop apps only]
Target Platform Windows
Header evr.h

See also

Functions