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This method allocates any resources needed by the DMO. Calling this method is always optional.
HRESULT AllocateStreamingResources(void);
Return Values
Returns S_OK if successful. Otherwise, returns an HRESULT value indicating the cause of the error.
Remarks
An application can call this method as a streaming optimization. It gives the DMO an opportunity to perform any time-consuming initializations before streaming begins.
If you call this method, do so after you set the media types on the DMO, but before you make the first calls to IMediaObject::ProcessInput or IMediaObject::ProcessOutput.
This method is optional in the following sense:
- If the DMO does not support this method, the method returns S_OK.
- If the application never calls this method, the DMO allocates resources within a call to ProcessInput or ProcessOutput.
If the DMO supports this method, it should also support the IMediaObject::FreeStreamingResources method.
Requirements
OS Versions: Windows CE .NET 4.1 and later.
Header: Dmo.h.
Link Library: Dmoguid.lib.
See Also
IMediaObject | IMediaObject::ProcessOutput | IMediaObject::ProcessInput | IMediaObject::FreeStreamingResources
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