Source code of Windows XP (NT5)
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/*==========================================================================
* * Copyright (C) 1999 Microsoft Corporation. All Rights Reserved. * * File: dsplayb.h * Content: Definition of the CDirectSoundPlaybackBuffer class * * History: * Date By Reason * ==== == ====== * 07/16/99 rodtoll Created * 08/04/99 rodtoll Updated to take dsound ranges for volume * 11/12/99 rodtoll Modified abstraction for new waveOut support. * Now abstracted types look almost like dsound objects * 01/27/2000 rodtoll Updated sound classes to accept playback flags, * buffer structures and DSBUFFERDESC instead of DSBUFFERDESC1 * 04/17/2000 rodtoll Fix: Bug #32215 - Session Lost after resuming from hibernation * ***************************************************************************/
#ifndef __DIRECTSOUNDPLAYBACKBUFFER_H
#define __DIRECTSOUNDPLAYBACKBUFFER_H
// CDirectSoundPlaybackBuffer
//
// This class provides an implementation of the CAudioPlaybackBuffer class
// for directsound. In the abstract sense, it represents a buffer of audio
// which can be played to the sound hardware which consists of multiple,
// equal length subbuffers.
//
class CDirectSoundPlaybackBuffer: public CAudioPlaybackBuffer{public: CDirectSoundPlaybackBuffer( LPDIRECTSOUNDBUFFER lpdsBuffer ); virtual ~CDirectSoundPlaybackBuffer();
public:
HRESULT Lock( DWORD dwWriteCursor, DWORD dwWriteBytes, LPVOID *lplpvBuffer1, LPDWORD lpdwSize1, LPVOID *lplpvBuffer2, LPDWORD lpdwSize2, DWORD dwFlags ); HRESULT UnLock( LPVOID lpvBuffer1, DWORD dwSize1, LPVOID lpvBuffer2, DWORD dwSize2 ); HRESULT SetVolume( LONG lVolume ); HRESULT GetCurrentPosition( LPDWORD lpdwPosition ); HRESULT SetCurrentPosition( DWORD dwPosition ); HRESULT Get3DBuffer( LPDIRECTSOUND3DBUFFER *lplpds3dBuffer ); HRESULT Play( DWORD dwPriority, DWORD dwFlags ); HRESULT Stop(); HRESULT Restore();
DWORD GetStartupLatency();
protected:
LPDIRECTSOUNDBUFFER m_lpdsBuffer; DWORD m_dwLastPosition; DWORD m_dwPriority; DWORD m_dwFlags; BOOL m_fPlaying; };
#endif
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