dsound_buf.h

audio-video-codecs.rar语音编解码器

/*
//
//                  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) 2003-2006 Intel Corporation. All Rights Reserved.
//
*/

#ifndef __DSOUND_BUF_H__
#define __DSOUND_BUF_H__

#ifdef UMC_ENABLE_DSOUND_AUDIO_RENDER

#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 Ipp32u dwBufferSize,
                             const Ipp16u wChannels,
                             const Ipp32u dwFrequency,
                             const Ipp16u wBytesPerSample);
        Status          CopyDataToBuffer(Ipp8u* pucData,
                                         Ipp32u dwLength,
                                         Ipp32u& rdwBytesWrote);
        Status          CopyZerosToBuffer(Ipp32u dwLength);
        Status          GetPlayPos(Ipp32u& rdwPos);
        Status          GetWritePos(Ipp32u& rdwPos);
        Status          Pause(bool bPause);
        Ipp32f          SetVolume(Ipp32f fVolume);
        Ipp32f          GetVolume();
        Status          Reset();
        void            Close();
        virtual Status  DynamicSetParams(const Ipp16u wChannels,
                                         const Ipp32u dwFrequency,
                                         const Ipp16u wBytesPerSample);
        inline Ipp32u   GetNextWriteOffset()
         {    return m_dwNextWriteOffset;    }

        inline Ipp32f   GetCompensation()
        {    return (Ipp32f) m_dfCompensation;    }

    protected:
        LPDIRECTSOUND8      m_pDS;
        LPDIRECTSOUNDBUFFER m_pDSBSecondary;
        LPDIRECTSOUNDBUFFER m_pDSBPrimary;
        Ipp32u              m_dwDSBufferSize;
        Ipp32u              m_dwNextWriteOffset;
        Ipp64f              m_dfNorm;
        Ipp64f              m_dfCompensation;
        HWND                m_hWnd;
        bool                m_bPausedWaitingData;
        UMC::Mutex          m_MutAccess;
        Ipp32u              m_dwInitedBufferSize;
        Ipp16u              m_wInitedChannels;
        Ipp32u              m_dwInitedFrequency;
        Ipp16u              m_wInitedBytesPerSample;
    };
} // namespace UMC

#endif //#ifdef UMC_ENABLE_DSOUND_AUDIO_RENDER

#endif // __DSOUND_BUF_H__