winmm_render.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.
//
*/

#ifndef __WIN_MM_AUDIO_RENDER_H__
#define __WIN_MM_AUDIO_RENDER_H__

#if defined (UMC_ENABLE_WINMM_AUDIO_RENDER)

#include "vm_debug.h"
#include <windows.h>
#include <mmsystem.h>

#include "basic_audio_render.h"

#define BUF_NUM_MAX 10
#define BUF_SIZE 1152*16

namespace UMC
{
    class WinMMAudioRender :public BasicAudioRender
    {
    public:
        WinMMAudioRender(void);

        // Initialize the audio device. The playback is paused
        Status          Init(MediaReceiverParams* pInit);

        // Write sound data to sound buffer
        Status          SendFrame(MediaData* in);
        Status          UnLockInputBuffer(MediaData *in, Status StreamStatus = UMC_OK);


        // Toggle pause mode. Return current pts
        Status          Pause(bool pause);

        // Close the sound device
        Status          Close(void);

        // 0-silence 1-max, return previous volume */
        float           SetVolume(float volume) { return volume;}
        float           GetVolume() { return 0.;}
        Status          Reset(void);

        double GetTimeTick();

        ~WinMMAudioRender(void);

        void        Release(void);

    protected:

        class BufArray
        {
        public:
            WAVEHDR     m_pArray[BUF_NUM_MAX];
            BufArray();
            ~BufArray();
            Status Init(vm_var32 uiBufSize);
            void ZeroBuffers();
            inline vm_var32 GetHdrNum();
        protected:
            vm_var32 m_uiBufSize;
            vm_var32 m_uiHdrNum;
        };

        BufArray    m_Hdrs;

        HANDLE      m_sm_free_buffers;
        int         m_iFreeBuf;
        int         m_iDoneBuf;

        HWAVEOUT     m_hWO;
        WAVEFORMATEX m_WaveFmtX;

        double      m_dfSampleNorm;
        double      m_dfStartPTS;
        int         m_iOffset;
        DWORD       m_dwVolume;
    };

    vm_var32
    WinMMAudioRender::BufArray::GetHdrNum()
    {   return m_uiHdrNum;  }

}  //  namespace UMC
#endif  // UMC_ENABLE_WINMM_AUDIO_RENDER
#endif  //  __WIN_MM_AUDIO_RENDER_H__