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src/Source/LibJXR/image/sys/strcodec.h  view on Meta::CPAN

            struct WMPStream* pWS;    // pointer to WMPStream
            long offPacket; // byte offset into stream

            //ULARGE_INTEGER u64Acc; 

    //========================================
    // index packet, used for packet retrieval
    //========================================
            U32 cIndex; // current index for index packet
            long offIndex;  // byte offset into stream for index packet
        }State;
    }P2Info;
    U8 P3[PACKETLENGTH];    // index packet buffer
} IOContext;

typedef struct tagMemReadState
{    
    U8* pbBuf;
    size_t cbBuf;
    size_t cbCur;
} MemReadState;

typedef struct tagBitIOInfo
{
    U32 uiShadow;   // shadow of first 4B of circular buffer

    U32 uiAccumulator;  // 32bit acc as bit field cache
    U32 cBitsUsed;  // # of bits used of acc, [0,16)
#ifdef ARMOPT_BITIO
    U32 cBitsUnused;  // # of bits remain unused in acc, [0,32]
#endif

    I32 iMask;  // mask used simulate pointer wrap around

    U8* pbStart;    // start pointer
#ifndef ARMOPT_BITIO
    U8* pbCurrent;  // current pointer
#else
    U32* pbCurrent;  // current pointer
#endif

    struct WMPStream* pWS;  // pointer to WMPStream
    size_t offRef;  // reference offset on IStream,
                            // for read, it moves along the stream
                            // for write, it stays at the attach point
} BitIOInfo;

//================================================================
typedef struct tagCWMIQuantizer {
    U8 iIndex;
    I32 iQP;
    I32 iOffset;
    I32 iMan;
    I32 iExp;
#if defined(WMP_OPT_QT)
    float f1_QP;
    double d1_QP;
#endif    
} CWMIQuantizer;

/* temporary bridge between old APIs and streaming APIs */
typedef struct tagCWMIMBInfo {
    I32 iBlockDC[MAX_CHANNELS][16];
    I32 iOrientation;
    Int iCBP[MAX_CHANNELS];
    Int iDiffCBP[MAX_CHANNELS];
    U8 iQIndexLP; // 0 - 15
    U8 iQIndexHP; // 0 - 15
} CWMIMBInfo;

struct CWMImageStrCodec;

typedef Int (*ImageDataProc)(struct CWMImageStrCodec*);

/** scan model **/
typedef struct CAdaptiveScan {
    U32		uTotal;
    U32		uScan;
} CAdaptiveScan;

/** Adaptive context model **/
typedef struct CCodingContext {
    BitIOInfo * m_pIODC;
    BitIOInfo * m_pIOLP;
    BitIOInfo * m_pIOAC;
    BitIOInfo * m_pIOFL;

    /** adaptive huffman structs **/
    CAdaptiveHuffman *m_pAdaptHuffCBPCY;
    CAdaptiveHuffman *m_pAdaptHuffCBPCY1;
    CAdaptiveHuffman *m_pAHexpt[NUMVLCTABLES];

    /** 4x4 zigzag patterns */
    CAdaptiveScan m_aScanLowpass[16];
    CAdaptiveScan m_aScanHoriz[16];
    CAdaptiveScan m_aScanVert[16];

    /** Adaptive bit reduction model **/
    CAdaptiveModel m_aModelAC;
    CAdaptiveModel m_aModelLP;
    CAdaptiveModel m_aModelDC;

    /** Adaptive lowpass CBP model **/
    Int     m_iCBPCountZero;
    Int     m_iCBPCountMax;

    /** Adaptive AC CBP model **/
    CCBPModel m_aCBPModel;

    /** Trim flex bits - externally set **/
    Int     m_iTrimFlexBits;

    Bool m_bInROI;  // inside ROI (for region decode and compressed domain cropping)?
} CCodingContext;

// Following stuff used to be in strPredQuant.h
/* circulant buffer for 2 MB rows: current row and previous row */
typedef struct tagCWMIPredInfo {
    Int iQPIndex;     // QP Index
    Int iCBP;      // coded block pattern
    PixelI iDC;    // DC of MB