IVMRSurfaceAllocatorNotify::NotifyEvent method (strmif.h)

Article
02/22/2024

[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 NotifyEvent method is called by the allocator-presenter to inform the VMR of any significant DirectShow events during the allocation or presentation processes.

Syntax

HRESULT NotifyEvent(
  [in] LONG     EventCode,
  [in] LONG_PTR Param1,
  [in] LONG_PTR Param2
);

Parameters

[in] EventCode

Specifies the event code.

[in] Param1

Specifies Param1 of the event code.

[in] Param2

Specifies Param2 of the event code.

Return value

If the method succeeds, it returns S_OK. If it fails, it returns an error code.

Remarks

The VMR provides the allocator-presenter with a pointer to this interface in a call to IVMRSurfaceAllocator::AdviseNotify. When the allocator-presenter calls this method and specifies some regular DirectShow event, such as EC_ERRORABORT or EC_VMR_RENDERDEVICE_SET, the VMR will pass the event to the filter graph manager.

Requirements

Requirement	Value
Minimum supported client	Windows XP with SP1 [desktop apps only]
Minimum supported server	Windows Server 2003 [desktop apps only]
Target Platform	Windows
Header	strmif.h (include Dshow.h)
Library	Strmiids.lib