/*
* Copyright (c) 2001-2002, David Janssens
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "t1.h"
#include "j2k.h"
#include "mqc.h"
#include "int.h"
#include "mct.h"
#include "dwt.h"
#include "int.h"
#include "fix.h"
#include <stdio.h>
#include <math.h>
#define T1_MAXCBLKW 64
#define T1_MAXCBLKH 64
#define T1_SIG_NE 0x0001
#define T1_SIG_SE 0x0002
#define T1_SIG_SW 0x0004
#define T1_SIG_NW 0x0008
#define T1_SIG_N 0x0010
#define T1_SIG_E 0x0020
#define T1_SIG_S 0x0040
#define T1_SIG_W 0x0080
#define T1_SIG_OTH (T1_SIG_N|T1_SIG_NE|T1_SIG_E|T1_SIG_SE|T1_SIG_S|T1_SIG_SW|T1_SIG_W|T1_SIG_NW)
#define T1_SIG_PRIM (T1_SIG_N|T1_SIG_E|T1_SIG_S|T1_SIG_W)
#define T1_SGN_N 0x0100
#define T1_SGN_E 0x0200
#define T1_SGN_S 0x0400
#define T1_SGN_W 0x0800
#define T1_SGN (T1_SGN_N|T1_SGN_E|T1_SGN_S|T1_SGN_W)
#define T1_SIG 0x1000
#define T1_REFINE 0x2000
#define T1_VISIT 0x4000
#define T1_NUMCTXS_AGG 1
#define T1_NUMCTXS_ZC 9
#define T1_NUMCTXS_MAG 3
#define T1_NUMCTXS_SC 5
#define T1_NUMCTXS_UNI 1
#define T1_CTXNO_AGG 0
#define T1_CTXNO_ZC (T1_CTXNO_AGG+T1_NUMCTXS_AGG)
#define T1_CTXNO_MAG (T1_CTXNO_ZC+T1_NUMCTXS_ZC)
#define T1_CTXNO_SC (T1_CTXNO_MAG+T1_NUMCTXS_MAG)
#define T1_CTXNO_UNI (T1_CTXNO_SC+T1_NUMCTXS_SC)
#define T1_NUMCTXS (T1_CTXNO_UNI+T1_NUMCTXS_UNI)
#define T1_NMSEDEC_BITS 7
#define T1_NMSEDEC_FRACBITS (T1_NMSEDEC_BITS-1)
int t1_lut_ctxno_zc[1024];
int t1_lut_ctxno_sc[256];
int t1_lut_ctxno_mag[4096];
int t1_lut_spb[256];
int t1_lut_nmsedec_sig[1<<T1_NMSEDEC_BITS];
int t1_lut_nmsedec_sig0[1<<T1_NMSEDEC_BITS];
int t1_lut_nmsedec_ref[1<<T1_NMSEDEC_BITS];
int t1_lut_nmsedec_ref0[1<<T1_NMSEDEC_BITS];
int t1_data[T1_MAXCBLKH][T1_MAXCBLKH];
int t1_flags[T1_MAXCBLKH+2][T1_MAXCBLKH+2];
int t1_getctxno_zc(int f, int orient) {
return t1_lut_ctxno_zc[(orient<<8)|(f&T1_SIG_OTH)];
}
int t1_getctxno_sc(int f) {
return t1_lut_ctxno_sc[(f&(T1_SIG_PRIM|T1_SGN))>>4];
}
int t1_getctxno_mag(int f) {
return t1_lut_ctxno_mag[(f&T1_SIG_OTH)|(((f&T1_REFINE)!=0)<<11)];
}
int t1_getspb(int f) {
return t1_lut_spb[(f&(T1_SIG_PRIM|T1_SGN))>>4];
}
int t1_getnmsedec_sig(int x, int bitpos) {
if (bitpos>T1_NMSEDEC_FRACBITS) {
return t1_lut_nmsedec_sig[(x>>(bitpos-T1_NMSEDEC_FRACBITS))&((1<<T1_NMSEDEC_BITS)-1)];
} else {
return t1_lut_nmsedec_sig0[x&((1<<T1_NMSEDEC_BITS)-1)];
}
}
int t1_getnmsedec_ref(int x, int bitpos) {
if (bitpos>T1_NMSEDEC_FRACBITS) {
return t1_lut_nmsedec_ref[(x>>(bitpos-T1_NMSEDEC_FRACBITS))&((1<<T1_NMSEDEC_BITS)-1)];
} else {
return t1_lut_nmsedec_ref0[x&((1<<T1_NMSEDEC_BITS)-1)];
}
}
void t1_updateflags(int *fp, int s) {
int *np=fp-(T1_MAXCBLKW+2);
int *sp=fp+(T1_MAXCBLKW+2);
np[-1]|=T1_SIG_SE;
np[1]|=T1_SIG_SW;
sp[-1]|=T1_SIG_NE;
sp[1]|=T1_SIG_NW;
*np|=T1_SIG_S;
*sp|=T1_SIG_N;
fp[-1]|=T1_SIG_E;
fp[1]|=T1_SIG_W;
if (s) {
*np|=T1_SGN_S;
*sp|=T1_SGN_N;
fp[-1]|=T1_SGN_E;
fp[1]|=T1_SGN_W;
}
}
void t1_enc_sigpass_step(int *fp, int *dp, int orient, int bpno, int one, int *nmsedec) {
int v;
if ((*fp&T1_SIG_OTH) && !(*fp&(T1_SIG|T1_VISIT))) {
mqc_setcurctx(t1_getctxno_zc(*fp, orient));
v=int_abs(*dp)&one?1:0;
mqc_encode(v);
if (v) {
*nmsedec+=t1_getnmsedec_sig(int_abs(*dp), bpno+T1_NMSEDEC_FRACBITS);
mqc_setcurctx(t1_getctxno_sc(*fp));
v=*dp<0?1:0;
mqc_encode(v^t1_getspb(*fp));
t1_updateflags(fp, v);
*fp|=T1_SIG;
}
*fp|=T1_VISIT;
}
}
void t1_dec_sigpass_step(int *fp, int *dp, int orient, int oneplushalf) {
int v;
if ((*fp&T1_SIG_OTH) && !(*fp&(T1_SIG|T1_VISIT))) {
mqc_setcurctx(t1_getctxno_zc(*fp, orient));
if (mqc_decode()) {
mqc_setcurctx(t1_getctxno_sc(*fp));
v=mqc_decode()^t1_getspb(*fp);
*dp=v?-oneplushalf:oneplushalf;
t1_updateflags(fp, v);
*fp|=T1_SIG;
}
*fp|=T1_VISIT;
}
}
void t1_enc_sigpass(int w, int h, int bpno, int orient, int *nmsedec) {
int i, j, k, one;
*nmsedec=0;
one=1<<(bpno+T1_NMSEDEC_FRACBITS);
for (k=0; k<h; k+=4) {
for (i=0; i<w; i++) {
for (j=k; j<k+4 && j<h; j++) {
t1_enc_sigpass_step(&t1_flags[1+j][1+i], &t1_data[j][i], orient, bpno, one, nmsedec);
}
}
}
}
void t1_dec_sigpass(int w, int h, int bpno, int orient) {
int i, j, k, one, half, oneplushalf;
one=1<<bpno;
half=one>>1;
oneplushalf=one|half;
for (k=0; k<h; k+=4) {
for (i=0; i<w; i++) {
for (j=k; j<k+4 && j<h; j++) {
t1_dec_sigpass_step(&t1_flags[1+j][1+i], &t1_data[j][i], orient, oneplushalf);
}
}
}
}
void t1_enc_refpass_step(int *fp, int *dp, int bpno, int one, int *nmsedec) {
int v;
if ((*fp&(T1_SIG|T1_VISIT))==T1_SIG) {
*nmsedec+=t1_getnmsedec_ref(int_abs(*dp), bpno+T1_NMSEDEC_FRACBITS);
mqc_setcurctx(t1_getctxno_mag(*fp));
v=int_abs(*dp)&one?1:0;
mqc_encode(v);
*fp|=T1_REFINE;
}
}
void t1_dec_refpass_step(int *fp, int *dp, int poshalf, int neghalf) {
int v, t;
if ((*fp&(T1_SIG|T1_VISIT))==T1_SIG) {
mqc_setcurctx(t1_getctxno_mag(*fp));
v=mqc_decode();
t=v?poshalf:neghalf;
*dp+=*dp<0?-t:t;
*fp|=T1_REFINE;
}
}
void t1_enc_refpass(int w, int h, int bpno, int *nmsedec) {
int i, j, k, one;
*nmsedec=0;
one=1<<(bpno+T1_NMSEDEC_FRACBITS);
for (k=0; k<h; k+=4) {
for (i=0; i<w; i++) {
for (j=k; j<k+4 && j<h; j++) {
t1_enc_refpass_step(&t1_flags[1+j][1+i], &t1_data[j][i], bpno, one, nmsedec);
}
}
}
}
void t1_dec_refpass(int w, int h, int bpno) {
int i, j, k, one, poshalf, neghalf;
one=1<<bpno;
poshalf=one>>1;
neghalf=bpno>0?-poshalf:-1;
for (k=0; k<h; k+=4) {
for (i=0; i<w; i++) {
for (j=k; j<k+4 && j<h; j++) {
t1_dec_refpass_step(&t1_flags[1+j][1+i], &t1_data[j][i], poshalf, neghalf);
}
}
}
}
void t1_enc_clnpass_step(int *fp, int *dp, int orient, int bpno, int one, int *nmsedec, int partial) {
int v;
if (partial) goto label_partial;
if (!(*fp&(T1_SIG|T1_VISIT))) {
mqc_setcurctx(t1_getctxno_zc(*fp, orient));
v=int_abs(*dp)&one?1:0;
mqc_encode(v);
if (v) {
label_partial:
*nmsedec+=t1_getnmsedec_sig(int_abs(*dp), bpno+T1_NMSEDEC_FRACBITS);
mqc_setcurctx(t1_getctxno_sc(*fp));
v=*dp<0?1:0;
mqc_encode(v^t1_getspb(*fp));
t1_updateflags(fp, v);
*fp|=T1_SIG;
}
}
*fp&=~T1_VISIT;
}
void t1_dec_clnpass_step(int *fp, int *dp, int orient, int oneplushalf, int partial) {
int v;
if (partial) goto label_partial;
if (!(*fp&(T1_SIG|T1_VISIT))) {
mqc_setcurctx(t1_getctxno_zc(*fp, orient));
if (mqc_decode()) {
label_partial:
mqc_setcurctx(t1_getctxno_sc(*fp));
v=mqc_decode()^t1_getspb(*fp);
*dp=v?-oneplushalf:oneplushalf;
t1_updateflags(fp, v);
*fp|=T1_SIG;
}
}
*fp&=~T1_VISIT;
}
void t1_enc_clnpass(int w, int h, int bpno, int orient, int *nmsedec) {
int i, j, k, one, agg, runlen;
*nmsedec=0;
one=1<<(bpno+T1_NMSEDEC_FRACBITS);
for (k=0; k<h; k+=4) {
for (i=0; i<w; i++) {
if (k+3<h) {
agg=!(t1_flags[1+k][1+i]&(T1_SIG|T1_VISIT|T1_SIG_OTH) ||
t1_flags[1+k+1][1+i]&(T1_SIG|T1_VISIT|T1_SIG_OTH) ||
t1_flags[1+k+2][1+i]&(T1_SIG|T1_VISIT|T1_SIG_OTH) ||
t1_flags[1+k+3][1+i]&(T1_SIG|T1_VISIT|T1_SIG_OTH));
} else {
agg=0;
}
if (agg) {
for (runlen=0; runlen<4; runlen++) {
if (int_abs(t1_data[k+runlen][i])&one) break;
}
mqc_setcurctx(T1_CTXNO_AGG);
mqc_encode(runlen!=4);
if (runlen==4) {
continue;
}
mqc_setcurctx(T1_CTXNO_UNI);
mqc_encode(runlen>>1);
mqc_encode(runlen&1);
} else {
runlen=0;
}
for (j=k+runlen; j<k+4 && j<h; j++) {
t1_enc_clnpass_step(&t1_flags[1+j][1+i], &t1_data[j][i], orient, bpno, one, nmsedec, agg && (j==k+runlen));
}
}
}
}
void t1_dec_clnpass(int w, int h, int bpno, int orient, int segsym) {
int i, j, k, one, half, oneplushalf, agg, runlen;
one=1<<bpno;
half=one>>1;
oneplushalf=one|half;
for (k=0; k<h; k+=4) {
for (i=0; i<w; i++) {
if (k+3<h) {
agg=!(t1_flags[1+k][1+i]&(T1_SIG|T1_VISIT|T1_SIG_OTH) ||
t1_flags[1+k+1][1+i]&(T1_SIG|T1_VISIT|T1_SIG_OTH) ||
t1_flags[1+k+2][1+i]&(T1_SIG|T1_VISIT|T1_SIG_OTH) ||
t1_flags[1+k+3][1+i]&(T1_SIG|T1_VISIT|T1_SIG_OTH));
} else {
agg=0;
}
if (agg) {
mqc_setcurctx(T1_CTXNO_AGG);
if (!mqc_decode()) {
continue;
}
mqc_setcurctx(T1_CTXNO_UNI);
runlen=mqc_decode();
runlen=(runlen<<1)|mqc_decode();
} else {
runlen=0;
}
for (j=k+runlen; j<k+4 && j<h; j++) {
t1_dec_clnpass_step(&t1_flags[1+j][1+i], &t1_data[j][i], orient, oneplushalf, agg && (j==k+runlen));
}
}
}
if (segsym) {
int v=0;
mqc_setcurctx(T1_CTXNO_UNI);
v=mqc_decode();
v=(v<<1)|mqc_decode();
v=(v<<1)|mqc_decode();
v=(v<<1)|mqc_decode();
if (v!=0xa) {
J2KWARNING("warning: bad segmentation symbol\n")
}
}
}
double t1_getwmsedec(int nmsedec, int compno, int level, int orient, int bpno, int qmfbid, double stepsize) {
double w1, w2, wmsedec;
if (qmfbid==1) {
w1=mct_getnorm(compno);
w2=dwt_getnorm(level, orient);
} else if (qmfbid==0) {
w1=mct_getnorm_real(compno);
w2=dwt_getnorm_real(level, orient);
}
wmsedec=w1*w2*stepsize*(1<<bpno);
wmsedec*=wmsedec*nmsedec/8192.0;
return wmsedec;
}
void t1_encode_cblk(tcd_cblk_t *cblk, int orient, int compno, int level, int qmfbid, double stepsize) {
int i, j;
int w, h;
int passno;
int bpno, passtype;
int max;
int nmsedec;
double cumwmsedec=0;
w=cblk->x1-cblk->x0;
h=cblk->y1-cblk->y0;
max=0;
for (j=0; j<h; j++) {
for (i=0; i<w; i++) {
max=int_max(max, int_abs(t1_data[j][i]));
}
}
cblk->numbps=max?(int_floorlog2(max)+1)-T1_NMSEDEC_FRACBITS:0;
for (i=0; i<sizeof(t1_flags)/sizeof(int); i++) ((int*)t1_flags)[i]=0;
bpno=cblk->numbps-1;
passtype=2;
mqc_resetstates();
mqc_setstate(T1_CTXNO_UNI, 0, 46);
mqc_setstate(T1_CTXNO_AGG, 0, 3);
mqc_setstate(T1_CTXNO_ZC, 0, 4);
mqc_init_enc(cblk->data);
for (passno=0; bpno>=0; passno++) {
tcd_pass_t *pass=&cblk->passes[passno];
switch (passtype) {
case 0:
t1_enc_sigpass(w, h, bpno, orient, &nmsedec);
break;
case 1:
t1_enc_refpass(w, h, bpno, &nmsedec);
break;
case 2:
t1_enc_clnpass(w, h, bpno, orient, &nmsedec);
break;
}
cumwmsedec+=t1_getwmsedec(nmsedec, compno, level, orient, bpno, qmfbid, stepsize);
pass->distortiondec=cumwmsedec;
pass->rate=mqc_numbytes()+3; // FIXME
if (++passtype==3) {
passtype=0;
bpno--;
}
}
mqc_flush();
cblk->totalpasses=passno;
}
void t1_decode_cblk(tcd_cblk_t *cblk, int orient, int roishift, int cblksty) {
int i;
int w, h;
int bpno, passtype;
int segno, passno;
for (i=0; i<sizeof(t1_data)/sizeof(int); i++) ((int*)t1_data)[i]=0;
for (i=0; i<sizeof(t1_flags)/sizeof(int); i++) ((int*)t1_flags)[i]=0;
w=cblk->x1-cblk->x0;
h=cblk->y1-cblk->y0;
bpno=roishift+cblk->numbps-1;
passtype=2;
mqc_resetstates();
mqc_setstate(T1_CTXNO_UNI, 0, 46);
mqc_setstate(T1_CTXNO_AGG, 0, 3);
mqc_setstate(T1_CTXNO_ZC, 0, 4);
for (segno=0; segno<cblk->numsegs; segno++) {
tcd_seg_t *seg=&cblk->segs[segno];
//fprintf(stderr, "t1_decode_cblk: segno=%d, seg->len=%d, seg->numpasses=%d\n", segno, seg->len, seg->numpasses);
mqc_init_dec(seg->data, seg->len);
for (passno=0; passno<seg->numpasses; passno++) {
switch (passtype) {
case 0:
t1_dec_sigpass(w, h, bpno, orient);
break;
case 1:
t1_dec_refpass(w, h, bpno);
break;
case 2:
t1_dec_clnpass(w, h, bpno, orient, cblksty&J2K_CCP_CBLKSTY_SEGSYM);
break;
}
if (++passtype==3) {
passtype=0;
bpno--;
}
}
}
}
void t1_encode_cblks(tcd_tile_t *tile, j2k_tcp_t *tcp) {
int compno, resno, bandno, precno, cblkno;
for (compno=0; compno<tile->numcomps; compno++) {
tcd_tilecomp_t *tilec=&tile->comps[compno];
for (resno=0; resno<tilec->numresolutions; resno++) {
tcd_resolution_t *res=&tilec->resolutions[resno];
for (bandno=0; bandno<res->numbands; bandno++) {
tcd_band_t *band=&res->bands[bandno];
for (precno=0; precno<res->pw*res->ph; precno++) {
tcd_precinct_t *prc=&band->precincts[precno];
for (cblkno=0; cblkno<prc->cw*prc->ch; cblkno++) {
int x, y, i, j, orient;
tcd_cblk_t *cblk=&prc->cblks[cblkno];
if (band->bandno==0) {
x=res->x0+cblk->x0;
y=res->y0+cblk->y0;
} else if (band->bandno==1) {
x=res->x1-(band->x1-band->x0)+cblk->x0;
y=res->y0+cblk->y0;
} else if (band->bandno==2) {
x=res->x0+cblk->x0;
y=res->y1-(band->y1-band->y0)+cblk->y0;
} else if (band->bandno==3) {
x=res->x1-(band->x1-band->x0)+cblk->x0;
y=res->y1-(band->y1-band->y0)+cblk->y0;
}
if (tcp->tccps[compno].qmfbid==1) {
for (j=0; j<cblk->y1-cblk->y0; j++) {
for (i=0; i<cblk->x1-cblk->x0; i++) {
t1_data[j][i]=tilec->data[x+i+(y+j)*(tilec->x1-tilec->x0)]<<T1_NMSEDEC_FRACBITS;
}
}
} else if (tcp->tccps[compno].qmfbid==0) {
for (j=0; j<cblk->y1-cblk->y0; j++) {
for (i=0; i<cblk->x1-cblk->x0; i++) {
t1_data[j][i]=fix_mul(tilec->data[x+i+(y+j)*(tilec->x1-tilec->x0)], 8192*8192/band->stepsize)>>(13-T1_NMSEDEC_FRACBITS);
}
}
}
orient=band->bandno; // FIXME
if (orient==2) orient=1;
else if (orient==1) orient=2;
t1_encode_cblk(cblk, orient, compno, tilec->numresolutions-1-resno, tcp->tccps[compno].qmfbid, band->stepsize);
}
}
}
}
}
}
void t1_decode_cblks(tcd_tile_t *tile, j2k_tcp_t *tcp) {
int compno, resno, bandno, precno, cblkno;
for (compno=0; compno<tile->numcomps; compno++) {
tcd_tilecomp_t *tilec=&tile->comps[compno];
for (resno=0; resno<tilec->numresolutions; resno++) {
tcd_resolution_t *res=&tilec->resolutions[resno];
for (bandno=0; bandno<res->numbands; bandno++) {
tcd_band_t *band=&res->bands[bandno];
for (precno=0; precno<res->pw*res->ph; precno++) {
tcd_precinct_t *prc=&band->precincts[precno];
for (cblkno=0; cblkno<prc->cw*prc->ch; cblkno++) {
int x, y, i, j, orient;
tcd_cblk_t *cblk=&prc->cblks[cblkno];
orient=band->bandno; // FIXME
if (orient==2) orient=1;
else if (orient==1) orient=2;
t1_decode_cblk(cblk, orient, tcp->tccps[compno].roishift, tcp->tccps[compno].cblksty);
if (band->bandno==0) {
x=cblk->x0-band->x0;
y=cblk->y0-band->y0;
} else if (band->bandno==1) {
tcd_resolution_t *pres=&tilec->resolutions[resno-1];
x=pres->x1-pres->x0+cblk->x0-band->x0;
y=cblk->y0-band->y0;
} else if (band->bandno==2) {
tcd_resolution_t *pres=&tilec->resolutions[resno-1];
x=cblk->x0-band->x0;
y=pres->y1-pres->y0+cblk->y0-band->y0;
} else if (band->bandno==3) {
tcd_resolution_t *pres=&tilec->resolutions[resno-1];
x=pres->x1-pres->x0+cblk->x0-band->x0;
y=pres->y1-pres->y0+cblk->y0-band->y0;
}
if (tcp->tccps[compno].roishift) {
int thresh, val, mag;
thresh=1<<tcp->tccps[compno].roishift;
for (j=0; j<cblk->y1-cblk->y0; j++) {
for (i=0; i<cblk->x1-cblk->x0; i++) {
val=t1_data[j][i];
mag=int_abs(val);
if (mag>=thresh) {
mag>>=tcp->tccps[compno].roishift;
t1_data[j][i]=val<0?-mag:mag;
}
}
}
}
if (tcp->tccps[compno].qmfbid==1) {
for (j=0; j<cblk->y1-cblk->y0; j++) {
for (i=0; i<cblk->x1-cblk->x0; i++) {
tilec->data[x+i+(y+j)*(tilec->x1-tilec->x0)]=t1_data[j][i];
}
}
} else if (tcp->tccps[compno].qmfbid==0) {
for (j=0; j<cblk->y1-cblk->y0; j++) {
for (i=0; i<cblk->x1-cblk->x0; i++) {
if (t1_data[j][i]==0) {
tilec->data[x+i+(y+j)*(tilec->x1-tilec->x0)]=0;
} else {
tilec->data[x+i+(y+j)*(tilec->x1-tilec->x0)]=fix_mul(t1_data[j][i]<<13, band->stepsize);
}
}
}
}
}
}
}
}
}
}
int t1_init_ctxno_zc(int f, int orient) {
int h,v,d,n,t,hv;n=0;h=((f&T1_SIG_W)!=0)+((f&T1_SIG_E)!=0);v=((f&T1_SIG_N)!=0)+((f&T1_SIG_S)!=0);d=((f&T1_SIG_NW)!=0)+((f&T1_SIG_NE)!=0)+((f&T1_SIG_SE)!=0)+((f&T1_SIG_SW)!=0);switch(orient){case 2:t=h;h=v;v=t;case 0:case 1:if(!h){if(!v){if(!d){n=0;}else if(d==1){n=1;}else{n=2;}}else if(v==1){n=3;}else{n=4;}}else if(h==1){if(!v){if(!d){n=5;}else{n=6;}}else{n=7;}}else{n=8;}break;case 3:hv=h+v;if(!d){if(!hv){n=0;}else if(hv==1){n=1;}else{n=2;}}else if(d==1){if(!hv){n=3;}else if(hv==1){ n=4;}else{n=5;}}else if(d==2){if(!hv){n=6;}else{n=7;}}else{n=8;}break;}return T1_CTXNO_ZC+n;
}
int t1_init_ctxno_sc(int f) {
int hc,vc,n;n=0;hc=int_min(((f&(T1_SIG_E|T1_SGN_E))==T1_SIG_E)+((f&(T1_SIG_W|T1_SGN_W))==T1_SIG_W),1)-int_min(((f&(T1_SIG_E|T1_SGN_E))==(T1_SIG_E|T1_SGN_E))+((f&(T1_SIG_W|T1_SGN_W))==(T1_SIG_W|T1_SGN_W)),1);vc=int_min(((f&(T1_SIG_N|T1_SGN_N))==T1_SIG_N)+((f&(T1_SIG_S|T1_SGN_S))==T1_SIG_S),1)-int_min(((f&(T1_SIG_N|T1_SGN_N))==(T1_SIG_N|T1_SGN_N))+((f&(T1_SIG_S|T1_SGN_S))==(T1_SIG_S|T1_SGN_S)),1);if(hc<0){hc=-hc;vc=-vc;}if(!hc){if(vc==-1){n=1;}else if(!vc){n=0;}else{n=1;}}else if(hc==1){if(vc==-1){n=2;}else if(!vc){n=3;}else{n=4;}}return T1_CTXNO_SC+n;
}
int t1_init_ctxno_mag(int f) {
int n;if(!(f&T1_REFINE)){n=(f&(T1_SIG_OTH))?1:0;}else{n=2;}return T1_CTXNO_MAG+n;
}
int t1_init_spb(int f) {
int hc,vc,n;hc=int_min(((f&(T1_SIG_E|T1_SGN_E))==T1_SIG_E)+((f&(T1_SIG_W|T1_SGN_W))==T1_SIG_W),1)-int_min(((f&(T1_SIG_E|T1_SGN_E))==(T1_SIG_E|T1_SGN_E))+((f&(T1_SIG_W|T1_SGN_W))==(T1_SIG_W|T1_SGN_W)),1);vc=int_min(((f&(T1_SIG_N|T1_SGN_N))==T1_SIG_N)+((f&(T1_SIG_S|T1_SGN_S))==T1_SIG_S),1)-int_min(((f&(T1_SIG_N|T1_SGN_N))==(T1_SIG_N|T1_SGN_N))+((f&(T1_SIG_S|T1_SGN_S))==(T1_SIG_S|T1_SGN_S)),1);if(!hc&&!vc){n=0;}else{n=(!(hc>0||(!hc&&vc>0)));}return n;
}
void t1_init_luts() {
int i,j;double u,v,t;for(j=0;j<4;j++){for(i=0;i<256;++i){t1_lut_ctxno_zc[(j<<8)|i]=t1_init_ctxno_zc(i,j);}}for(i=0;i<256;i++){t1_lut_ctxno_sc[i]=t1_init_ctxno_sc(i<<4);}for(j=0;j<2;j++){for(i=0;i<2048;++i){t1_lut_ctxno_mag[(j<<11)+i]=t1_init_ctxno_mag((j?T1_REFINE:0)|i);}}for(i=0;i<256;++i){t1_lut_spb[i]=t1_init_spb(i<<4);}
// FIXME FIXME FIXME
//printf("nmsedec luts:\n");
for (i=0; i<(1<<T1_NMSEDEC_BITS); i++) {
t=i/pow(2,T1_NMSEDEC_FRACBITS);
u=t;
v=t-1.5;
t1_lut_nmsedec_sig[i]=int_max(0,(int)(floor((u*u-v*v)*pow(2,T1_NMSEDEC_FRACBITS)+ 0.5)/pow(2,T1_NMSEDEC_FRACBITS)*8192.0));
t1_lut_nmsedec_sig0[i]=int_max(0,(int)(floor((u*u)*pow(2,T1_NMSEDEC_FRACBITS)+0.5)/pow(2,T1_NMSEDEC_FRACBITS)*8192.0));
u=t-1.0;
if (i&(1<<(T1_NMSEDEC_BITS-1))) {
v=t-1.5;
} else {
v=t-0.5;
}
t1_lut_nmsedec_ref[i]=int_max(0,(int)(floor((u*u-v*v)*pow(2,T1_NMSEDEC_FRACBITS)+0.5)/pow(2,T1_NMSEDEC_FRACBITS)*8192.0));
t1_lut_nmsedec_ref0[i]=int_max(0,(int)(floor((u*u)*pow(2,T1_NMSEDEC_FRACBITS)+0.5)/pow(2,T1_NMSEDEC_FRACBITS)*8192.0));
//printf("%d: %d %d %d %d\n", i, t1_lut_nmsedec_sig[i], t1_lut_nmsedec_sig0[i], t1_lut_nmsedec_ref[i], t1_lut_nmsedec_ref0[i]);
}
}
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