umc_audio_spl.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 __UMC_AUDIO_SPL_H__
#define __UMC_AUDIO_SPL_H__

#include "umc_mpeg2_spl_av.h"

//Pure mpeg audio splitter

namespace UMC
{
    class MPEG2AudioSplitter : public MPEG2AVSplitter
    {
    public:
        MPEG2AudioSplitter();

        virtual  Status GetPosition (double& pos);

        virtual  Status GetInfo     (SplitterInfo* pSplInfo);
    protected:

        virtual Status InitAudioFrameBuffer();
        //here must be implemented real packet processing,
        //it is specific for each format

        //this function witll return control if reading error
        //or end of stream happen
        Status virtual  ProcessPackets(int count = -1);

        //read one packet (or size bytes of pure stream) and
        //return control, for PS, TS streams size parameter must be 0
        //returned UMC_OK means next frame was formed and ready
        //to output
        //UMC_NOT_ENOUGH_DATA means packed was processed but frame
        //is not ready
        //all other is errors
        Status virtual  ProcessOnePacket(int size = 0)
        { return UMC_NOT_IMPLEMENTED;}

        //initialization of subprocessing, call before ProcessOnePacket
        Status virtual  InitProcessing()
        { return UMC_NOT_IMPLEMENTED;}

        //de-initialization of subprocessing, call after ProcessOnePacket
        Status virtual  CloseProcessing()
        { return UMC_NOT_IMPLEMENTED;}

        //here must be implemented pointer positioning to first
        //valid start code after repositioning
        Status virtual  MoveToNextSyncWord();


    };
} // namespace UMC

#endif /* __UMC_AUDIO_SPL_H__ */