dsound_buf.h

这是在PCA下的基于IPP库示例代码例子,在网上下了IPP的库之后,设置相关参数就可以编译该代码.

/*//////////////////////////////////////////////////////////////////////////////
//
//                  INTEL CORPORATION PROPRIETARY INFORMATION
//     This software is supplied under the terms of a license agreement or
//     nondisclosure agreement with Intel Corporation and may not be copied
//     or disclosed except in accordance with the terms of that agreement.
//          Copyright(c) 2003-2005 Intel Corporation. All Rights Reserved.
//
*/

#ifdef UMC_ENABLE_DSOUND_AUDIO_RENDER


#ifndef __DIRECT_SOUND_BUFFER_H__
#define __DIRECT_SOUND_BUFFER_H__

#include <dplay.h>
#include <dsound.h>
#include "umc_structures.h"
#include "umc_mutex.h"

namespace UMC
{
    class DSBuffer
    {
    public:
        DSBuffer():
            m_pDS(NULL),
            m_pDSBSecondary(NULL),
            m_pDSBPrimary(NULL),
            m_dwDSBufferSize(0),
            m_dwNextWriteOffset(0),
            m_dfNorm(1),
            m_dfCompensation(0.005),
            m_hWnd(NULL),
            m_bPausedWaitingData(false)
        {}
        virtual ~DSBuffer(){    Close();    }

        Status          Init(const HWND hWnd,
                            const DWORD dwBufferSize,
                            const WORD wChannels,
                            const DWORD dwFrequency,
                            const WORD wBytesPerSample);
        Status          CopyDataToBuffer(unsigned char* pucData,
                                    DWORD dwLength,
                                    DWORD& rdwBytesWrote);
        Status          GetPlayPos(DWORD& rdwPos);
        Status          GetWritePos(DWORD& rdwPos);
        Status          Pause(bool bPause);
        float           SetVolume(float fVolume);
        float           GetVolume();
        Status          Reset();
        void            Close();
        virtual Status  DynamicSetParams(const WORD wChannels,
                            const DWORD dwFrequency,
                            const WORD wBytesPerSample);
        inline DWORD    GetNextWriteOffset()
         {    return m_dwNextWriteOffset;    }

        inline float    GetCompensation()
        {    return (float) m_dfCompensation;    }

    protected:
        LPDIRECTSOUND8       m_pDS;
        LPDIRECTSOUNDBUFFER  m_pDSBSecondary;
        LPDIRECTSOUNDBUFFER  m_pDSBPrimary;
        DWORD                m_dwDSBufferSize;
        DWORD                m_dwNextWriteOffset;
        double               m_dfNorm;
        double               m_dfCompensation;
        HWND                 m_hWnd;
        bool                 m_bPausedWaitingData;
        UMC::Mutex           m_MutAccess;
        DWORD               m_dwInitedBufferSize;
        WORD                m_wInitedChannels;
        DWORD               m_dwInitedFrequency;
        WORD                m_wInitedBytesPerSample;
    };
}  //  namespace UMC
#endif    //     __DIRECT_SOUND_BUFFER_H__
#endif //#ifdef UMC_ENABLE_DSOUND_AUDIO_RENDER