umc_mpeg2ts_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_MPEG2TS_SPL_H__
#define __UMC_MPEG2TS_SPL_H__

#include "umc_mpeg2pes_spl.h"

//MPEG2 Transport stream splitter
//"0x47..PMT.."..."0x47..PAT.."...
//"0x47..PES..video data.."..."0x47..video data.."...
//"0x47..PES..audio data.."..."0x47..audio data.."...
namespace UMC
{
    class MPEG2TSSplitter : public MPEG2PESSplitter
    {
    public:
        MPEG2TSSplitter():MPEG2PESSplitter()
        {
            m_pTmpDataBuffAct   = NULL;
            m_uiChoosedProgram  = 0;
            m_bFistAudioFrame[0] = true;
            m_bFistAudioFrame[1] = true;
            m_bFirstValidAPTS = false;
            m_uiNextSyncBytePos = 188;
        }

        ~MPEG2TSSplitter()
        {
        }
    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();

        int    virtual CheckIfNewES(bool isAudio, int streamID, int index = -1);

        /*Functions for backward motion*/

        Status virtual GetPrevGop( unsigned int pid, vm_sizet p_start,vm_sizet &posIFrame,vm_sizet &posPackege);
        Status virtual ProcessPackets_back(unsigned int pid,
                                           vm_sizet p_packege_start,
                                           vm_sizet p_start,
                                           vm_sizet p_end);
    protected:
        Status         MPEG2TSPack();

        int            TSProgramMapSection(int payload_indicator, int index);

        int            ProgramAssociationSection(int payload_indicator);

        Status         CheckTSSyncByte(unsigned char &byteCode);

    protected:
        unsigned int    m_uiRegularPackSize; //it can be 188 or 192
        unsigned int    m_uiNextSyncBytePos;
        unsigned int    m_uiCurrentPackSize; //it is equal regular packet size
                                             //plus error bytes
        unsigned int    m_uiChoosedProgram;
    private:
        //transport stream specific functionality
        //different descriptors
        Status AdaptationField              (int  adaptation_field_control);
        int GetDescriptor                   (int index);
        int AC3AudioStreamDescriptor        (int& gotBytes, int index);
        int RegistrationDescriptor          (int dscrLen,
                                             unsigned int& format_identifier);
        int CADescriptor                    (int dscrLen);
        int CopyrightDescriptor             (int dscrLen);
        int ISO639LanguageDescriptor        (int dscrLen);
        int VideoStreamDescriptor           ();
        int AudioStreamDescriptor           ();
        int HierarchyDescriptor             ();
        int DataStreamAlignmentDescriptor   ();
        int TargetBackgroundGridDescriptor  ();
        int VideoWindowDescriptor           ();
        int SystemClockDescriptor           ();
        int MultiplexBufferUtilizationDescriptor();
        int MaximumBitrateDescriptor        ();
        int PrivateDataIndicatorDescriptor  ();
        int SmoothingBufferDescriptor       ();
        int STDDescriptor                   ();
        int IBPDescriptor                   ();

    };

} // namespace UMC

#endif /* __UMC_MPEG2TS_SPL_H__ */