VOLUME~3.H
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上传日期:2019-11-03
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- // VolumeOutWave.h : Module interface declaration.
- // IVolume implementation for wave audio output device
- // Developer : Alex Chmut
- // Created : 8/11/98
- #pragma once
- #include "IVolume.h"
- ///////////////////////////////////////////////////////////////////////////////////////////////
- class CVolumeOutWave
- : public IVolume
- {
- ////////////////////////
- // IVolume interface
- public:
- virtual bool IsAvailable();
- virtual void Enable();
- virtual void Disable();
- virtual DWORD GetVolumeMetric();
- virtual DWORD GetMinimalVolume();
- virtual DWORD GetMaximalVolume();
- virtual DWORD GetCurrentVolume();
- virtual void SetCurrentVolume( DWORD dwValue );
- virtual void RegisterNotificationSink( PONMICVOULUMECHANGE, DWORD );
- public:
- CVolumeOutWave();
- ~CVolumeOutWave();
- private:
- bool Init();
- void Done();
- bool Initialize();
- void EnableLine( bool bEnable = true );
- private:
- // Status Info
- bool m_bOK;
- bool m_bInitialized;
- bool m_bAvailable;
- // Mixer Info
- UINT m_uMixerID;
- DWORD m_dwMixerHandle;
- DWORD m_dwLineID;
- DWORD m_dwVolumeControlID;
- int m_nChannelCount;
-
- HWND m_hWnd;
- static LRESULT CALLBACK MixerWndProc( HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam );
- void OnControlChanged( DWORD dwControlID );
- DWORD m_dwMinimalVolume;
- DWORD m_dwMaximalVolume;
- DWORD m_dwVolumeStep;
- // User Info
- PONMICVOULUMECHANGE m_pfUserSink;
- DWORD m_dwUserValue;
- };
- typedef CVolumeOutWave* PCVolumeOutWave;
- ///////////////////////////////////////////////////////////////////////////////////////////////