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59 lines
1.5 KiB
C++
59 lines
1.5 KiB
C++
#pragma once
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#include <mfidl.h>
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#include <mfapi.h>
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#include <mfobjects.h>
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#ifndef METHODASYNCCALLBACK
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#define METHODASYNCCALLBACK(Parent, AsyncCallback, pfnCallback) \
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class Callback##AsyncCallback :\
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public IMFAsyncCallback \
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{ \
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public: \
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Callback##AsyncCallback() : \
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_parent(((Parent*)((BYTE*)this - offsetof(Parent, m_x##AsyncCallback)))), \
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_dwQueueID( MFASYNC_CALLBACK_QUEUE_MULTITHREADED ) \
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{ \
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} \
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\
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STDMETHOD_( ULONG, AddRef )() \
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{ \
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return _parent->AddRef(); \
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} \
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STDMETHOD_( ULONG, Release )() \
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{ \
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return _parent->Release(); \
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} \
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STDMETHOD( QueryInterface )( REFIID riid, void **ppvObject ) \
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{ \
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if (riid == IID_IMFAsyncCallback || riid == IID_IUnknown) \
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{ \
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(*ppvObject) = this; \
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AddRef(); \
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return S_OK; \
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} \
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*ppvObject = NULL; \
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return E_NOINTERFACE; \
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} \
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STDMETHOD( GetParameters )( \
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/* [out] */ __RPC__out DWORD *pdwFlags, \
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/* [out] */ __RPC__out DWORD *pdwQueue) \
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{ \
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*pdwFlags = 0; \
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*pdwQueue = _dwQueueID; \
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return S_OK; \
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} \
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STDMETHOD( Invoke )( /* [out] */ __RPC__out IMFAsyncResult * pResult ) \
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{ \
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_parent->pfnCallback( pResult ); \
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return S_OK; \
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} \
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void SetQueueID( DWORD dwQueueID ) { _dwQueueID = dwQueueID; } \
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\
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protected: \
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Parent* _parent; \
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DWORD _dwQueueID; \
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\
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} m_x##AsyncCallback;
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#endif
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