void_audio_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.
//
*/


//
//    This file contains audio render doing nothing beside returning right time
//    based on system time. You can use it for pure video (without audio)
//    streams syncronization.
//

#ifndef __VOID_AUDIO_RENDER_H__
#define __VOID_AUDIO_RENDER_H__

#include "vm_time.h"
#include "umc_structures.h"
#include "basic_audio_render.h"


namespace UMC
{
    typedef enum
    {
        UMC_1X_FFMODE = 0,
        UMC_2X_FFMODE = 1,
        UMC_4X_FFMODE = 3,
        UMC_8X_FFMODE = 7,
        UMC_16X_FFMODE = 15

    }UMC_FFMODE_MULTIPLIER;

    class NULLAudioRender : public BasicAudioRender
    {
    protected:

        vm_tick         m_lliFreq;
        vm_tick         m_lliLastStartTime;
        vm_tick         m_lliPrePauseTime;
        bool            m_bPaused;
        double          m_dInitialDelay;
        double          m_uiFFModeMult;
        virtual double    GetTimeTick();

    public:
        NULLAudioRender(double dfDelay = 0,
                        UMC_FFMODE_MULTIPLIER mult = UMC_1X_FFMODE);
        virtual ~NULLAudioRender() {   Close();     }

        virtual Status  Init(MediaReceiverParams* pInit);
        virtual Status  SendFrame(MediaData* in);
        virtual Status  Pause(bool bPause);

        // Render manipulating
        // 0-silence 1-max, return previous volume
        virtual float   SetVolume(float /*volume*/);
        virtual float   GetVolume();

        virtual Status  Close ();
        virtual Status  Reset ();

        virtual Status SetParams(MediaReceiverParams *params);
    };
}  //  namespace UMC
#endif    //    __OSS_AUDIO_RENDER_H__