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         n = 0;
  44         h = ((f & T1_SIG_W) != 0) + ((f & T1_SIG_E) != 0);
  45         v = ((f & T1_SIG_N) != 0) + ((f & T1_SIG_S) != 0);
  46         d = ((f & T1_SIG_NW) != 0) + ((f & T1_SIG_NE) != 0) + ((f & T1_SIG_SE) != 0) + ((f & T1_SIG_SW) != 0);
  47
  48         switch (orient) {
  49                 case 2:
  50                         t = h;
  51                         h = v;
  52                         v = t;
  53                 case 0:
  54                 case 1:
  55                         if (!h) {
  56                                 if (!v) {
  57                                         if (!d)
  58                                                 n = 0;
  59                                         else if (d == 1)
  60                                                 n = 1;
  61                                         else
  62                                                 n = 2;
  63                                 } else if (v == 1) {
  64                                         n = 3;
  65                                 } else {
  66                                         n = 4;
  67                                 }
  68                         } else if (h == 1) {
  69                                 if (!v) {
  70                                         if (!d)
  71                                                 n = 5;
  72                                         else
  73                                                 n = 6;
  74                                 } else {
  75                                         n = 7;
  76                                 }
  77                         } else
  78                                 n = 8;
  79                         break;
  80                 case 3:
  81                         hv = h + v;
  82                         if (!d) {
  83                                 if (!hv) {
  84                                         n = 0;
  85                                 } else if (hv == 1) {
  86                                         n = 1;
  87                                 } else {
  88                                         n = 2;
  89                                 }
  90                         } else if (d == 1) {
  91                                 if (!hv) {
  92                                         n = 3;
  93                                 } else if (hv == 1) {
  94                                         n = 4;
  95                                 } else {
  96                                         n = 5;
  97                                 }
  98                         } else if (d == 2) {
  99                                 if (!hv) {
 100                                         n = 6;
 101                                 } else {
 102                                         n = 7;
 103                                 }
 104                         } else {
 105                                 n = 8;
 106                         }
 107                         break;
 108         }
 109
 110         return (T1_CTXNO_ZC + n);
 111 }
 112
 113 static int t1_init_ctxno_sc(int f) {
 114         int hc, vc, n;
 115         n = 0;
 116
 117         hc = opj_int_min(((f & (T1_SIG_E | T1_SGN_E)) ==
 118                                 T1_SIG_E) + ((f & (T1_SIG_W | T1_SGN_W)) == T1_SIG_W),
 119                         1) - opj_int_min(((f & (T1_SIG_E | T1_SGN_E)) ==
 120                                         (T1_SIG_E | T1_SGN_E)) +
 121                                 ((f & (T1_SIG_W | T1_SGN_W)) ==
 122                                  (T1_SIG_W | T1_SGN_W)), 1);
 123
 124         vc = opj_int_min(((f & (T1_SIG_N | T1_SGN_N)) ==
 125                                 T1_SIG_N) + ((f & (T1_SIG_S | T1_SGN_S)) == T1_SIG_S),
 126                         1) - opj_int_min(((f & (T1_SIG_N | T1_SGN_N)) ==
 127                                         (T1_SIG_N | T1_SGN_N)) +
 128                                 ((f & (T1_SIG_S | T1_SGN_S)) ==
 129                                  (T1_SIG_S | T1_SGN_S)), 1);
 130
 131         if (hc < 0) {
 132                 hc = -hc;
 133                 vc = -vc;
 134         }
 135         if (!hc) {
 136                 if (vc == -1)
 137                         n = 1;
 138                 else if (!vc)
 139                         n = 0;
 140                 else
 141                         n = 1;
 142         } else if (hc == 1) {
 143                 if (vc == -1)
 144                         n = 2;
 145                 else if (!vc)
 146                         n = 3;
 147                 else
 148                         n = 4;
 149         }
 150
 151         return (T1_CTXNO_SC + n);
 152 }
 153
 154 static int t1_init_spb(int f) {
 155         int hc, vc, n;
 156
 157         hc = opj_int_min(((f & (T1_SIG_E | T1_SGN_E)) ==
 158                                 T1_SIG_E) + ((f & (T1_SIG_W | T1_SGN_W)) == T1_SIG_W),
 159                         1) - opj_int_min(((f & (T1_SIG_E | T1_SGN_E)) ==
 160                                         (T1_SIG_E | T1_SGN_E)) +
 161                                 ((f & (T1_SIG_W | T1_SGN_W)) ==
 162                                  (T1_SIG_W | T1_SGN_W)), 1);
 163
 164         vc = opj_int_min(((f & (T1_SIG_N | T1_SGN_N)) ==
 165                                 T1_SIG_N) + ((f & (T1_SIG_S | T1_SGN_S)) == T1_SIG_S),
 166                         1) - opj_int_min(((f & (T1_SIG_N | T1_SGN_N)) ==
 167                                         (T1_SIG_N | T1_SGN_N)) +
 168                                 ((f & (T1_SIG_S | T1_SGN_S)) ==
 169                                  (T1_SIG_S | T1_SGN_S)), 1);
 170
 171         if (!hc && !vc)
 172                 n = 0;
 173         else
 174                 n = (!(hc > 0 || (!hc && vc > 0)));
 175
 176         return n;
 177 }
 178
 179 static void dump_array16(int array[],int size){
 180         int i;
 181         --size;
 182         for (i = 0; i < size; ++i) {
 183                 printf("0x%04x, ", array[i]);
 184                 if(!((i+1)&0x7))
 185                         printf("\n  ");
 186         }
 187         printf("0x%04x\n};\n\n", array[size]);
 188 }
 189
 190 int main(int argc, char **argv)
 191 {
 192         int i, j;
 193         double u, v, t;
 194
 195         int lut_ctxno_zc[1024];
 196         int lut_nmsedec_sig[1 << T1_NMSEDEC_BITS];
 197         int lut_nmsedec_sig0[1 << T1_NMSEDEC_BITS];
 198         int lut_nmsedec_ref[1 << T1_NMSEDEC_BITS];
 199         int lut_nmsedec_ref0[1 << T1_NMSEDEC_BITS];
 200   (void)argc; (void)argv;
 201
 202         printf("/* This file was automatically generated by t1_generate_luts.c */\n\n");
 203
 204         /* lut_ctxno_zc */
 205         for (j = 0; j < 4; ++j) {
 206                 for (i = 0; i < 256; ++i) {
 207                         int orient = j;
 208                         if (orient == 2) {
 209                                 orient = 1;
 210                         } else if (orient == 1) {
 211                                 orient = 2;
 212                         }
 213                         lut_ctxno_zc[(orient << 8) | i] = t1_init_ctxno_zc(i, j);
 214                 }
 215         }
 216
 217         printf("static OPJ_BYTE lut_ctxno_zc[1024] = {\n  ");
 218         for (i = 0; i < 1023; ++i) {
 219                 printf("%i, ", lut_ctxno_zc[i]);
 220                 if(!((i+1)&0x1f))
 221                         printf("\n  ");
 222         }
 223         printf("%i\n};\n\n", lut_ctxno_zc[1023]);
 224
 225         /* lut_ctxno_sc */
 226         printf("static OPJ_BYTE lut_ctxno_sc[256] = {\n  ");
 227         for (i = 0; i < 255; ++i) {
 228                 printf("0x%x, ", t1_init_ctxno_sc(i << 4));
 229                 if(!((i+1)&0xf))
 230                         printf("\n  ");
 231         }
 232         printf("0x%x\n};\n\n", t1_init_ctxno_sc(255 << 4));
 233
 234         /* lut_spb */
 235         printf("static OPJ_BYTE lut_spb[256] = {\n  ");
 236         for (i = 0; i < 255; ++i) {
 237                 printf("%i, ", t1_init_spb(i << 4));
 238                 if(!((i+1)&0x1f))
 239                         printf("\n  ");
 240         }
 241         printf("%i\n};\n\n", t1_init_spb(255 << 4));
 242
 243         /* FIXME FIXME FIXME */
 244         /* fprintf(stdout,"nmsedec luts:\n"); */
 245         for (i = 0; i < (1 << T1_NMSEDEC_BITS); ++i) {
 246                 t = i / pow(2, T1_NMSEDEC_FRACBITS);
 247                 u = t;
 248                 v = t - 1.5;
 249                 lut_nmsedec_sig[i] =
 250                         opj_int_max(0,
 251                                         (int) (floor((u * u - v * v) * pow(2, T1_NMSEDEC_FRACBITS) + 0.5) / pow(2, T1_NMSEDEC_FRACBITS) * 8192.0));
 252                 lut_nmsedec_sig0[i] =
 253                         opj_int_max(0,
 254                                         (int) (floor((u * u) * pow(2, T1_NMSEDEC_FRACBITS) + 0.5) / pow(2, T1_NMSEDEC_FRACBITS) * 8192.0));
 255                 u = t - 1.0;
 256                 if (i & (1 << (T1_NMSEDEC_BITS - 1))) {
 257                         v = t - 1.5;
 258                 } else {
 259                         v = t - 0.5;
 260                 }
 261                 lut_nmsedec_ref[i] =
 262                         opj_int_max(0,
 263                                         (int) (floor((u * u - v * v) * pow(2, T1_NMSEDEC_FRACBITS) + 0.5) / pow(2, T1_NMSEDEC_FRACBITS) * 8192.0));
 264                 lut_nmsedec_ref0[i] =
 265                         opj_int_max(0,
 266                                         (int) (floor((u * u) * pow(2, T1_NMSEDEC_FRACBITS) + 0.5) / pow(2, T1_NMSEDEC_FRACBITS) * 8192.0));
 267         }
 268
 269         printf("static OPJ_INT16 lut_nmsedec_sig[1 << T1_NMSEDEC_BITS] = {\n  ");
 270         dump_array16(lut_nmsedec_sig, 1 << T1_NMSEDEC_BITS);
 271
 272         printf("static OPJ_INT16 lut_nmsedec_sig0[1 << T1_NMSEDEC_BITS] = {\n  ");
 273         dump_array16(lut_nmsedec_sig0, 1 << T1_NMSEDEC_BITS);
 274
 275         printf("static OPJ_INT16 lut_nmsedec_ref[1 << T1_NMSEDEC_BITS] = {\n  ");
 276         dump_array16(lut_nmsedec_ref, 1 << T1_NMSEDEC_BITS);
 277
 278         printf("static OPJ_INT16 lut_nmsedec_ref0[1 << T1_NMSEDEC_BITS] = {\n  ");
 279         dump_array16(lut_nmsedec_ref0, 1 << T1_NMSEDEC_BITS);
 280
 281         return 0;
 282 }