umc_dv_enc_segment_writer.h

audio-video-codecs.rar语音编解码器

/*
//              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) 2006-2007 Intel Corporation. All Rights Reserved.
//
*/
#include "umc_defs.h"
#if defined (UMC_ENABLE_DV_VIDEO_ENCODER)

#ifndef __DV_SEGMENT_WRITER_H
#define __DV_SEGMENT_WRITER_H

#include "ippdefs.h"
#include "umc_structures.h"

namespace UMC
{

//This enumeration type corresponds to the Table 2 shown on the P.6 of the SMPTE 314M-2005
enum SectionType
{
    Header     = 0,
    Subcode    = 1,
    VAUX       = 2,
    Audio      = 3,
    Video      = -4,
    Reserved0  = -3,
    Reserved1  = -2,
    Reserved2  = -1
};

// This structure corresponds to the Table 1 shown on the P.5 of the SMPTE 314M-2005
struct DIFBlockIDData
{
    Ipp32s Arb  : 4;
    Ipp32u Res1 : 1;
    SectionType SCT  : 3;

    Ipp32s Res2 : 2;
    Ipp32u FSP  : 1;
    Ipp32u FSC  : 1;
    Ipp32s Dseq : 4;

    Ipp32s DBN  : 8;
};

// This structure corresponds to the Table 6 shown on the P.8 of the SMPTE 314M-2005
struct HeaderDIFBlockData
{
    Ipp32s Res1  : 6;
    Ipp32u zero : 1;
    Ipp32u DSF  : 1;

    Ipp32s APT  : 3;
    Ipp32s Res2 : 5;

    Ipp32s AP1   : 3;
    Ipp32s Res3  : 4;
    Ipp32u TF1   : 1;

    Ipp32s AP2   : 3;
    Ipp32s Res4  : 4;
    Ipp32u TF2   : 1;

    Ipp32s AP3   : 3;
    Ipp32s Res5  : 4;
    Ipp32u TF3   : 1;
};

class VideoEncoderParams;

class DVSegmentWriter
{
public:
    DVSegmentWriter(void);
    ~DVSegmentWriter(void);

    Status InitWriter(Ipp8s DSF, Ipp8u AppType);
    void SetDVSegment(struct DV_SEGMENT **lpDVSegment);
    void ReleaseWriter();

    void StartDIFSequence(Ipp8u DIFSeqNum, Ipp8u FSC, Ipp8u FSP=1);

    Ipp8u *m_pDest;   // Destination pointer

protected:
    void WriteIDSection(DIFBlockIDData *pIDData, SectionType SCT, Ipp8u DIFBlockNum);
    void WriteHeader();
    void WriteEmptyAudioSection();

    Ipp8u m_VideoDataDIFBlockNum;
    Ipp8u m_AudioDataDIFBlockNum;

    Ipp8s m_DSF; //DIF Sequence flag:
                 //DSF = 0 for 525/60 system (10 DIF sequences included in a channel)
                 //DSF = 1 for 625/50 system (12 DIF sequences included in a channel)

    Ipp8s m_DIFSeqNum;//(0..9 for 525/60 system, 0..11 for 625/50 system)

    Ipp8s m_FSC;      //0 - First,  1 - Second channel
    Ipp8s m_FSP;      //This bit is used in DV100 together with FSC to indicate channel number:
                      //(FSC, FSP): (0,1) - first channel; (1,1) - second; (0,0) third; (1,0)-fourth

    Ipp8u m_AppType;  //Application type: 0 means consumer digital VCR, 0x7 (111b) means that source is uknown
                      //This field is also used to distinguish DVSD (if 0) and DV25 (if 0x7)
};

}//namespace UMC

#endif //__DV_SEGMENT_WRITER_H

#endif //(UMC_ENABLE_DV_VIDEO_ENCODER)