60 lines
1.8 KiB
C++
60 lines
1.8 KiB
C++
//////////////////////////////////////////////////////////////////////////
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//
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// preview.h : Preview helper class.
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//
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// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
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// ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
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// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
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// PARTICULAR PURPOSE.
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//
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//////////////////////////////////////////////////////////////////////////
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#pragma once
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class CPreview : public IMFPMediaPlayerCallback
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{
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public:
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static HRESULT CreateInstance(
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HWND hVideo,
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CPreview **ppPlayer
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);
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// IUnknown methods
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STDMETHODIMP QueryInterface(REFIID iid, void** ppv);
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STDMETHODIMP_(ULONG) AddRef();
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STDMETHODIMP_(ULONG) Release();
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void STDMETHODCALLTYPE OnMediaPlayerEvent(MFP_EVENT_HEADER * pEventHeader);
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HRESULT SetDevice(IMFActivate *pActivate);
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HRESULT CloseDevice();
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HRESULT UpdateVideo();
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HRESULT CheckDeviceLost(DEV_BROADCAST_HDR *pHdr, BOOL *pbDeviceLost);
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BOOL HasVideo() const { return m_bHasVideo; }
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protected:
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// Constructor is private. Use static CreateInstance method to instantiate.
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CPreview(HWND hVideo);
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// Destructor is private. Caller should call Release.
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virtual ~CPreview();
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// Event handlers
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void OnMediaItemCreated(MFP_MEDIAITEM_CREATED_EVENT *pEvent);
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void OnMediaItemSet(MFP_MEDIAITEM_SET_EVENT *pEvent);
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protected:
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long m_nRefCount; // Reference count.
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IMFPMediaPlayer *m_pPlayer;
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IMFMediaSource *m_pSource;
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HWND m_hwnd;
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BOOL m_bHasVideo;
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WCHAR *m_pwszSymbolicLink;
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UINT32 m_cchSymbolicLink;
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}; |