src/lib/openjp2/t1_generate_luts.c

   1 /*
   2  * The copyright in this software is being made available under the 2-clauses
   3  * BSD License, included below. This software may be subject to other third
   4  * party and contributor rights, including patent rights, and no such rights
   5  * are granted under this license.
   6  *
   7  * Copyright (c) 2002-2014, Universite catholique de Louvain (UCL), Belgium
   8  * Copyright (c) 2002-2014, Professor Benoit Macq
   9  * Copyright (c) 2001-2003, David Janssens
  10  * Copyright (c) 2002-2003, Yannick Verschueren
  11  * Copyright (c) 2003-2007, Francois-Olivier Devaux
  12  * Copyright (c) 2003-2014, Antonin Descampe
  13  * Copyright (c) 2005, Herve Drolon, FreeImage Team
  14  * Copyright (c) 2007, Callum Lerwick <seg@haxxed.com>
  15  * All rights reserved.
  16  *
  17  * Redistribution and use in source and binary forms, with or without
  18  * modification, are permitted provided that the following conditions
  19  * are met:
  20  * 1. Redistributions of source code must retain the above copyright
  21  *    notice, this list of conditions and the following disclaimer.
  22  * 2. Redistributions in binary form must reproduce the above copyright
  23  *    notice, this list of conditions and the following disclaimer in the
  24  *    documentation and/or other materials provided with the distribution.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
  27  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  30  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  36  * POSSIBILITY OF SUCH DAMAGE.
  37  */
  38
  39 #include "opj_includes.h"
  40
  41 static int t1_init_ctxno_zc(int f, int orient) {
  42         int h, v, d, n, t, hv;
  43         h = ((f & T1_SIG_W) != 0) + ((f & T1_SIG_E) != 0);
  44         v = ((f & T1_SIG_N) != 0) + ((f & T1_SIG_S) != 0);
  45         d = ((f & T1_SIG_NW) != 0) + ((f & T1_SIG_NE) != 0) + ((f & T1_SIG_SE) != 0) + ((f & T1_SIG_SW) != 0);
  46         n = 0;
  47         t = 0;
  48         hv = 0;
  49
  50         switch (orient) {
  51                 case 2:
  52                         t = h;
  53                         h = v;
  54                         v = t;
  55                 case 0:
  56                 case 1:
  57                         if (!h) {
  58                                 if (!v) {
  59                                         if (!d)
  60                                                 n = 0;
  61                                         else if (d == 1)
  62                                                 n = 1;
  63                                         else
  64                                                 n = 2;
  65                                 } else if (v == 1) {
  66                                         n = 3;
  67                                 } else {
  68                                         n = 4;
  69                                 }
  70                         } else if (h == 1) {
  71                                 if (!v) {
  72                                         if (!d)
  73                                                 n = 5;
  74                                         else
  75                                                 n = 6;
  76                                 } else {
  77                                         n = 7;
  78                                 }
  79                         } else
  80                                 n = 8;
  81                         break;
  82                 case 3:
  83                         hv = h + v;
  84                         if (!d) {
  85                                 if (!hv) {
  86                                         n = 0;
  87                                 } else if (hv == 1) {
  88                                         n = 1;
  89                                 } else {
  90                                         n = 2;
  91                                 }
  92                         } else if (d == 1) {
  93                                 if (!hv) {
  94                                         n = 3;
  95                                 } else if (hv == 1) {
  96                                         n = 4;
  97                                 } else {
  98                                         n = 5;
  99                                 }
 100                         } else if (d == 2) {
 101                                 if (!hv) {
 102                                         n = 6;
 103                                 } else {
 104                                         n = 7;
 105                                 }
 106                         } else {
 107                                 n = 8;
 108                         }
 109                         break;
 110         }
 111
 112         return (T1_CTXNO_ZC + n);
 113 }
 114
 115 static int t1_init_ctxno_sc(int f) {
 116         int hc, vc, n;
 117         n = 0;
 118
 119         hc = opj_int_min(((f & (T1_SIG_E | T1_SGN_E)) ==
 120                                 T1_SIG_E) + ((f & (T1_SIG_W | T1_SGN_W)) == T1_SIG_W),
 121                         1) - opj_int_min(((f & (T1_SIG_E | T1_SGN_E)) ==
 122                                         (T1_SIG_E | T1_SGN_E)) +
 123                                 ((f & (T1_SIG_W | T1_SGN_W)) ==
 124                                  (T1_SIG_W | T1_SGN_W)), 1);
 125
 126         vc = opj_int_min(((f & (T1_SIG_N | T1_SGN_N)) ==
 127                                 T1_SIG_N) + ((f & (T1_SIG_S | T1_SGN_S)) == T1_SIG_S),
 128                         1) - opj_int_min(((f & (T1_SIG_N | T1_SGN_N)) ==
 129                                         (T1_SIG_N | T1_SGN_N)) +
 130                                 ((f & (T1_SIG_S | T1_SGN_S)) ==
 131                                  (T1_SIG_S | T1_SGN_S)), 1);
 132
 133         if (hc < 0) {
 134                 hc = -hc;
 135                 vc = -vc;
 136         }
 137         if (!hc) {
 138                 if (vc == -1)
 139                         n = 1;
 140                 else if (!vc)
 141                         n = 0;
 142                 else
 143                         n = 1;
 144         } else if (hc == 1) {
 145                 if (vc == -1)
 146                         n = 2;
 147                 else if (!vc)
 148                         n = 3;
 149                 else
 150                         n = 4;
 151         }
 152
 153         return (T1_CTXNO_SC + n);
 154 }
 155
 156 static int t1_init_spb(int f) {
 157         int hc, vc, n;
 158
 159         hc = opj_int_min(((f & (T1_SIG_E | T1_SGN_E)) ==
 160                                 T1_SIG_E) + ((f & (T1_SIG_W | T1_SGN_W)) == T1_SIG_W),
 161                         1) - opj_int_min(((f & (T1_SIG_E | T1_SGN_E)) ==
 162                                         (T1_SIG_E | T1_SGN_E)) +
 163                                 ((f & (T1_SIG_W | T1_SGN_W)) ==
 164                                  (T1_SIG_W | T1_SGN_W)), 1);
 165
 166         vc = opj_int_min(((f & (T1_SIG_N | T1_SGN_N)) ==
 167                                 T1_SIG_N) + ((f & (T1_SIG_S | T1_SGN_S)) == T1_SIG_S),
 168                         1) - opj_int_min(((f & (T1_SIG_N | T1_SGN_N)) ==
 169                                         (T1_SIG_N | T1_SGN_N)) +
 170                                 ((f & (T1_SIG_S | T1_SGN_S)) ==
 171                                  (T1_SIG_S | T1_SGN_S)), 1);
 172
 173         if (!hc && !vc)
 174                 n = 0;
 175         else
 176                 n = (!(hc > 0 || (!hc && vc > 0)));
 177
 178         return n;
 179 }
 180
 181 static void dump_array16(int array[],int size){
 182         int i;
 183         --size;
 184         for (i = 0; i < size; ++i) {
 185                 printf("0x%04x, ", array[i]);
 186                 if(!((i+1)&0x7))
 187                         printf("\n  ");
 188         }
 189         printf("0x%04x\n};\n\n", array[size]);
 190 }
 191
 192 int main(int argc, char **argv)
 193 {
 194         int i, j;
 195         double u, v, t;
 196
 197         int lut_ctxno_zc[1024];
 198         int lut_nmsedec_sig[1 << T1_NMSEDEC_BITS];
 199         int lut_nmsedec_sig0[1 << T1_NMSEDEC_BITS];
 200         int lut_nmsedec_ref[1 << T1_NMSEDEC_BITS];
 201         int lut_nmsedec_ref0[1 << T1_NMSEDEC_BITS];
 202   (void)argc; (void)argv;
 203
 204         printf("/* This file was automatically generated by t1_generate_luts.c */\n\n");
 205
 206         /* lut_ctxno_zc */
 207         for (j = 0; j < 4; ++j) {
 208                 for (i = 0; i < 256; ++i) {
 209                         int orient = j;
 210                         if (orient == 2) {
 211                                 orient = 1;
 212                         } else if (orient == 1) {
 213                                 orient = 2;
 214                         }
 215                         lut_ctxno_zc[(orient << 8) | i] = t1_init_ctxno_zc(i, j);
 216                 }
 217         }
 218
 219         printf("static OPJ_BYTE lut_ctxno_zc[1024] = {\n  ");
 220         for (i = 0; i < 1023; ++i) {
 221                 printf("%i, ", lut_ctxno_zc[i]);
 222                 if(!((i+1)&0x1f))
 223                         printf("\n  ");
 224         }
 225         printf("%i\n};\n\n", lut_ctxno_zc[1023]);
 226
 227         /* lut_ctxno_sc */
 228         printf("static OPJ_BYTE lut_ctxno_sc[256] = {\n  ");
 229         for (i = 0; i < 255; ++i) {
 230                 printf("0x%x, ", t1_init_ctxno_sc(i << 4));
 231                 if(!((i+1)&0xf))
 232                         printf("\n  ");
 233         }
 234         printf("0x%x\n};\n\n", t1_init_ctxno_sc(255 << 4));
 235
 236         /* lut_spb */
 237         printf("static OPJ_BYTE lut_spb[256] = {\n  ");
 238         for (i = 0; i < 255; ++i) {
 239                 printf("%i, ", t1_init_spb(i << 4));
 240                 if(!((i+1)&0x1f))
 241                         printf("\n  ");
 242         }
 243         printf("%i\n};\n\n", t1_init_spb(255 << 4));
 244
 245         /* FIXME FIXME FIXME */
 246         /* fprintf(stdout,"nmsedec luts:\n"); */
 247         for (i = 0; i < (1 << T1_NMSEDEC_BITS); ++i) {
 248                 t = i / pow(2, T1_NMSEDEC_FRACBITS);
 249                 u = t;
 250                 v = t - 1.5;
 251                 lut_nmsedec_sig[i] =
 252                         opj_int_max(0,
 253                                         (int) (floor((u * u - v * v) * pow(2, T1_NMSEDEC_FRACBITS) + 0.5) / pow(2, T1_NMSEDEC_FRACBITS) * 8192.0));
 254                 lut_nmsedec_sig0[i] =
 255                         opj_int_max(0,
 256                                         (int) (floor((u * u) * pow(2, T1_NMSEDEC_FRACBITS) + 0.5) / pow(2, T1_NMSEDEC_FRACBITS) * 8192.0));
 257                 u = t - 1.0;
 258                 if (i & (1 << (T1_NMSEDEC_BITS - 1))) {
 259                         v = t - 1.5;
 260                 } else {
 261                         v = t - 0.5;
 262                 }
 263                 lut_nmsedec_ref[i] =
 264                         opj_int_max(0,
 265                                         (int) (floor((u * u - v * v) * pow(2, T1_NMSEDEC_FRACBITS) + 0.5) / pow(2, T1_NMSEDEC_FRACBITS) * 8192.0));
 266                 lut_nmsedec_ref0[i] =
 267                         opj_int_max(0,
 268                                         (int) (floor((u * u) * pow(2, T1_NMSEDEC_FRACBITS) + 0.5) / pow(2, T1_NMSEDEC_FRACBITS) * 8192.0));
 269         }
 270
 271         printf("static OPJ_INT16 lut_nmsedec_sig[1 << T1_NMSEDEC_BITS] = {\n  ");
 272         dump_array16(lut_nmsedec_sig, 1 << T1_NMSEDEC_BITS);
 273
 274         printf("static OPJ_INT16 lut_nmsedec_sig0[1 << T1_NMSEDEC_BITS] = {\n  ");
 275         dump_array16(lut_nmsedec_sig0, 1 << T1_NMSEDEC_BITS);
 276
 277         printf("static OPJ_INT16 lut_nmsedec_ref[1 << T1_NMSEDEC_BITS] = {\n  ");
 278         dump_array16(lut_nmsedec_ref, 1 << T1_NMSEDEC_BITS);
 279
 280         printf("static OPJ_INT16 lut_nmsedec_ref0[1 << T1_NMSEDEC_BITS] = {\n  ");
 281         dump_array16(lut_nmsedec_ref0, 1 << T1_NMSEDEC_BITS);
 282
 283         return 0;
 284 }