libopenjpeg/t1_generate_luts.c

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