umc_mpeg2pes_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_MPEG2PES_SPL_H__
#define __UMC_MPEG2PES_SPL_H__

#include "umc_mpeg2_spl_av.h"

//MPEG2 PES stream splitter, it can be used as is for
//PES packet stream like
//"E0..data..""C0..data..""E0..data..""C0..data.."

namespace UMC
{

    class MPEG2PESSplitter : public MPEG2AVSplitter
    {
    public:
        MPEG2PESSplitter()
        {
            //no data was skipped
            m_uiSkippedDataSize = 0;
            //need to find first audio frame and detect audio type
            m_bFistAudioFrame[0] = true;
            m_bFistAudioFrame[1] = true;

        }
        ~MPEG2PESSplitter()
        {
        }

        Status virtual GetPosition  (double& pos);
        Status virtual GetInfo      (SplitterInfo* pSplInfo);

    protected:

        //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);

        //initialization of subprocessing, call before ProcessOnePacket
        Status virtual  InitProcessing();

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

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

    protected:
        Status virtual MPEG2PSPackHeader();

        //PES packet as described in ISO/IEC 13818-1
        //PES packet contains
        //PES packet header
        //and data bytes
        //size = 0 means PS
        //TS otherwise
        Status virtual MPEG2PESPack(int size = 0, int index = -1, int PID = -1);


        //PES packet header extracts PST if it presents
        Status virtual MPEG2PESPacketHeader(
                                      double* out_pts, //take and calculate PTS
                                      double* out_dts, //take and calculate PTS
                                      int &gotBytes);  //and skip remain header


        //check if new elementary stream
        int    virtual CheckIfNewES(bool isAudio, int streamID,
                                    int index = -1);

        Status virtual GetAudioTime(double* time, double timeStamp);

        Status virtual GetVideoTime(double* time, double timeStamp);

    protected:
        //DVD AC3 packet header parsing
        Status ParseAC3PacketHeader(ElementaryStream* pES);

        //DVD LPCM packet header parsing
        Status ParseLPCMPacketHeader(ElementaryStream* pES);

    protected:

        //counts size of padding, auxiliary data and etc
        //it is not audio or video and was skipped
        unsigned int      m_uiSkippedDataSize;

    };
} // namespace UMC

#endif /* __UMC_MPEG2PES_SPL_H__ */