path: root/converter/other/jpeg2000/libjasper/jpc/jpc_t1cod.h

/*
 * Copyright (c) 1999-2000 Image Power, Inc. and the University of
 *   British Columbia.
 * Copyright (c) 2001-2002 Michael David Adams.
 * All rights reserved.
 */

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 */

/*
 * $Id$
 */

#ifndef JPC_T1COD_H
#define JPC_T1COD_H

/******************************************************************************\
* Includes.
\******************************************************************************/

#include "jasper/jas_fix.h"
#include "jasper/jas_math.h"

#include "jpc_mqcod.h"
#include "jpc_tsfb.h"

/******************************************************************************\
* Constants.
\******************************************************************************/

/* The number of bits used to index into various lookup tables. */
#define JPC_NMSEDEC_BITS        7
#define JPC_NMSEDEC_FRACBITS    (JPC_NMSEDEC_BITS - 1)

/*
 * Segment types.
 */

/* Invalid. */
#define JPC_SEG_INVALID 0
/* MQ. */
#define JPC_SEG_MQ              1
/* Raw. */
#define JPC_SEG_RAW             2

/* The nominal word size. */
#define JPC_PREC        32

/* Tier-1 coding pass types. */
#define JPC_SIGPASS     0       /* significance */
#define JPC_REFPASS     1       /* refinement */
#define JPC_CLNPASS     2       /* cleanup */

/*
 * Per-sample state information for tier-1 coding.
 */

/* The northeast neighbour has been found to be significant. */
#define JPC_NESIG       0x0001
/* The southeast neighbour has been found to be significant. */
#define JPC_SESIG       0x0002
/* The southwest neighbour has been found to be significant. */
#define JPC_SWSIG       0x0004
/* The northwest neighbour has been found to be significant. */
#define JPC_NWSIG       0x0008
/* The north neighbour has been found to be significant. */
#define JPC_NSIG        0x0010
/* The east neighbour has been found to be significant. */
#define JPC_ESIG        0x0020
/* The south neighbour has been found to be significant. */
#define JPC_SSIG        0x0040
/* The west neighbour has been found to be significant. */
#define JPC_WSIG        0x0080
/* The significance mask for 8-connected neighbours. */
#define JPC_OTHSIGMSK \
        (JPC_NSIG | JPC_NESIG | JPC_ESIG | JPC_SESIG | JPC_SSIG | JPC_SWSIG | JPC_WSIG | JPC_NWSIG)
/* The significance mask for 4-connected neighbours. */
#define JPC_PRIMSIGMSK  (JPC_NSIG | JPC_ESIG | JPC_SSIG | JPC_WSIG)

/* The north neighbour is negative in value. */
#define JPC_NSGN        0x0100
/* The east neighbour is negative in value. */
#define JPC_ESGN        0x0200
/* The south neighbour is negative in value. */
#define JPC_SSGN        0x0400
/* The west neighbour is negative in value. */
#define JPC_WSGN        0x0800
/* The sign mask for 4-connected neighbours. */
#define JPC_SGNMSK      (JPC_NSGN | JPC_ESGN | JPC_SSGN | JPC_WSGN)

/* This sample has been found to be significant. */
#define JPC_SIG         0x1000
/* The sample has been refined. */
#define JPC_REFINE      0x2000
/* This sample has been processed during the significance pass. */
#define JPC_VISIT       0x4000

/* The number of aggregation contexts. */
#define JPC_NUMAGGCTXS  1
/* The number of zero coding contexts. */
#define JPC_NUMZCCTXS   9
/* The number of magnitude contexts. */
#define JPC_NUMMAGCTXS  3
/* The number of sign coding contexts. */
#define JPC_NUMSCCTXS   5
/* The number of uniform contexts. */
#define JPC_NUMUCTXS    1

/* The context ID for the first aggregation context. */
#define JPC_AGGCTXNO    0
/* The context ID for the first zero coding context. */
#define JPC_ZCCTXNO             (JPC_AGGCTXNO + JPC_NUMAGGCTXS)
/* The context ID for the first magnitude context. */
#define JPC_MAGCTXNO    (JPC_ZCCTXNO + JPC_NUMZCCTXS)
/* The context ID for the first sign coding context. */
#define JPC_SCCTXNO             (JPC_MAGCTXNO + JPC_NUMMAGCTXS)
/* The context ID for the first uniform context. */
#define JPC_UCTXNO              (JPC_SCCTXNO + JPC_NUMSCCTXS)
/* The total number of contexts. */
#define JPC_NUMCTXS             (JPC_UCTXNO + JPC_NUMUCTXS)

/******************************************************************************\
* External data.
\******************************************************************************/

/* These lookup tables are used by various macros/functions. */
/* Do not access these lookup tables directly. */
extern int jpc_zcctxnolut[];
extern int jpc_spblut[];
extern int jpc_scctxnolut[];
extern int jpc_magctxnolut[];
extern jpc_fix_t jpc_refnmsedec[];
extern jpc_fix_t jpc_signmsedec[];
extern jpc_fix_t jpc_refnmsedec0[];
extern jpc_fix_t jpc_signmsedec0[];

/* The initial settings for the MQ contexts. */
extern jpc_mqctx_t jpc_mqctxs[];

/******************************************************************************\
* Functions and macros.
\******************************************************************************/

/* Initialize the MQ contexts. */
void jpc_initctxs(jpc_mqctx_t *ctxs);

/* Get the zero coding context. */
int jpc_getzcctxno(int f, int orient);
#define JPC_GETZCCTXNO(f, orient) \
        (jpc_zcctxnolut[((orient) << 8) | ((f) & JPC_OTHSIGMSK)])

/* Get the sign prediction bit. */
int jpc_getspb(int f);
#define JPC_GETSPB(f) \
        (jpc_spblut[((f) & (JPC_PRIMSIGMSK | JPC_SGNMSK)) >> 4])

/* Get the sign coding context. */
int jpc_getscctxno(int f);
#define JPC_GETSCCTXNO(f) \
        (jpc_scctxnolut[((f) & (JPC_PRIMSIGMSK | JPC_SGNMSK)) >> 4])

/* Get the magnitude context. */
int jpc_getmagctxno(int f);
#define JPC_GETMAGCTXNO(f) \
        (jpc_magctxnolut[((f) & JPC_OTHSIGMSK) | ((((f) & JPC_REFINE) != 0) << 11)])

/* Get the normalized MSE reduction for significance passes. */
#define JPC_GETSIGNMSEDEC(x, bitpos)    jpc_getsignmsedec_macro(x, bitpos)
jpc_fix_t jpc_getsignmsedec_func(jpc_fix_t x, int bitpos);
#define jpc_getsignmsedec_macro(x, bitpos) \
        ((bitpos > JPC_NMSEDEC_FRACBITS) ? jpc_signmsedec[JPC_ASR(x, bitpos - JPC_NMSEDEC_FRACBITS) & JAS_ONES(JPC_NMSEDEC_BITS)] : \
          (jpc_signmsedec0[JPC_ASR(x, bitpos - JPC_NMSEDEC_FRACBITS) & JAS_ONES(JPC_NMSEDEC_BITS)]))

/* Get the normalized MSE reduction for refinement passes. */
#define JPC_GETREFNMSEDEC(x, bitpos)    jpc_getrefnmsedec_macro(x, bitpos)
jpc_fix_t jpc_refsignmsedec_func(jpc_fix_t x, int bitpos);
#define jpc_getrefnmsedec_macro(x, bitpos) \
        ((bitpos > JPC_NMSEDEC_FRACBITS) ? jpc_refnmsedec[JPC_ASR(x, bitpos - JPC_NMSEDEC_FRACBITS) & JAS_ONES(JPC_NMSEDEC_BITS)] : \
          (jpc_refnmsedec0[JPC_ASR(x, bitpos - JPC_NMSEDEC_FRACBITS) & JAS_ONES(JPC_NMSEDEC_BITS)]))

/* Arithmetic shift right (with ability to shift left also). */
#define JPC_ASR(x, n) \
        (((n) >= 0) ? ((x) >> (n)) : ((x) << (-(n))))

/* Update the per-sample state information. */
#define JPC_UPDATEFLAGS4(fp, rowstep, s, vcausalflag) \
{ \
        register jpc_fix_t *np = (fp) - (rowstep); \
        register jpc_fix_t *sp = (fp) + (rowstep); \
        if ((vcausalflag)) { \
                sp[-1] |= JPC_NESIG; \
                sp[1] |= JPC_NWSIG; \
                if (s) { \
                        *sp |= JPC_NSIG | JPC_NSGN; \
                        (fp)[-1] |= JPC_ESIG | JPC_ESGN; \
                        (fp)[1] |= JPC_WSIG | JPC_WSGN; \
                } else { \
                        *sp |= JPC_NSIG; \
                        (fp)[-1] |= JPC_ESIG; \
                        (fp)[1] |= JPC_WSIG; \
                } \
        } else { \
                np[-1] |= JPC_SESIG; \
                np[1] |= JPC_SWSIG; \
                sp[-1] |= JPC_NESIG; \
                sp[1] |= JPC_NWSIG; \
                if (s) { \
                        *np |= JPC_SSIG | JPC_SSGN; \
                        *sp |= JPC_NSIG | JPC_NSGN; \
                        (fp)[-1] |= JPC_ESIG | JPC_ESGN; \
                        (fp)[1] |= JPC_WSIG | JPC_WSGN; \
                } else { \
                        *np |= JPC_SSIG; \
                        *sp |= JPC_NSIG; \
                        (fp)[-1] |= JPC_ESIG; \
                        (fp)[1] |= JPC_WSIG; \
                } \
        } \
}

/* Initialize the lookup tables used by the codec. */
void jpc_initluts(void);

/* Get the nominal gain associated with a particular band. */
int JPC_NOMINALGAIN(int qmfbid, int numlvls, int lvlno, int orient);

/* Get the coding pass type. */
int JPC_PASSTYPE(int passno);

/* Get the segment type. */
int JPC_SEGTYPE(int passno, int firstpassno, int bypass);

/* Get the number of coding passess in the segment. */
int JPC_SEGPASSCNT(int passno, int firstpassno, int numpasses, int bypass,
  int termall);

/* Is the coding pass terminated? */
int JPC_ISTERMINATED(int passno, int firstpassno, int numpasses, int termall,
  int lazy);

#endif