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IBufferManager::AllocBuffer

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The AllocBuffer method allocates a buffer for the transform to use.

Syntax

HRESULT AllocBuffer(
  FORMAT_TYPE  type,
  IBuffer**  ppBuffer
);

Parameters

type

[in]  One or more FORMAT_TYPE values specifying the type of buffer to create.

ppBuffer

[out]  Pointer to a new IBuffer interface pointer to use. The application must release this interface when it is no longer needed.

Return Values

The method returns an HRESULT of S_OK for success, or a standard COM error code for failure.

Remarks

The AllocBuffer method should be for temporary use only, because the output buffer is provided to the transform by Windows Movie Maker. Do not cache this buffer between calls to IMediaTransform::Process, for reasons described in the Process method documentation.

Requirements

Client: Windows Vista

Header: Include gputransformplugin.h and GPUPipelineTime.h.

Library: Use GPUPipelineVC7.lib (for Visual Studio .NET) or GPUPipelineVC8.lib (for Visual Studio 2005).

See Also