IVMRSurfaceAllocatorNotify9::NotifyEvent method (vmr9.h)
[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 |
|---|---|
|
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
| 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 |