IVMRSurfaceAllocatorNotify9::NotifyEvent method (vmr9.h)

Статья
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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 NotifyEvent method is called by the allocator-presenter to inform the VMR of any significant DirectShow events that it (the allocator presenter) generates 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 DirectShow event code.

[in] Param1

Specifies the first event parameter. The meaning depends on the event code. See Event Notification Codes.

[in] Param2

Specifies the second event parameter. The meaning depends on the event code.

Return value

The method returns an HRESULT. Possible values include those in the following table.

Return code	Description
S_OK	The method succeeded.

Remarks

The VMR provides the allocator-presenter with a pointer to this interface in a call to IVMRSurfaceAllocator9::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.

Include DShow.h and D3d9.h before Vmr9.h.

Requirements

Requirement	Value
Minimum supported client	Windows XP with SP2 [desktop apps only]
Minimum supported server	Windows Server 2003 R2 [desktop apps only]
Target Platform	Windows
Header	vmr9.h
Library	Strmiids.lib

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