jpc_t1cod.c 13.4 KB
Newer Older
wester committed
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497
/*
 * Copyright (c) 1999-2000 Image Power, Inc. and the University of
 *   British Columbia.
 * Copyright (c) 2001-2003 Michael David Adams.
 * All rights reserved.
 */

/* __START_OF_JASPER_LICENSE__
 *
 * JasPer License Version 2.0
 *
 * Copyright (c) 2001-2006 Michael David Adams
 * Copyright (c) 1999-2000 Image Power, Inc.
 * Copyright (c) 1999-2000 The University of British Columbia
 *
 * All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person (the
 * "User") obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without restriction,
 * including without limitation the rights to use, copy, modify, merge,
 * publish, distribute, and/or sell copies of the Software, and to permit
 * persons to whom the Software is furnished to do so, subject to the
 * following conditions:
 *
 * 1.  The above copyright notices and this permission notice (which
 * includes the disclaimer below) shall be included in all copies or
 * substantial portions of the Software.
 *
 * 2.  The name of a copyright holder shall not be used to endorse or
 * promote products derived from the Software without specific prior
 * written permission.
 *
 * THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS
 * LICENSE.  NO USE OF THE SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER
 * THIS DISCLAIMER.  THE SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS
 * "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
 * PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.  IN NO
 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
 * INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
 * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
 * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
 * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.  NO ASSURANCES ARE
 * PROVIDED BY THE COPYRIGHT HOLDERS THAT THE SOFTWARE DOES NOT INFRINGE
 * THE PATENT OR OTHER INTELLECTUAL PROPERTY RIGHTS OF ANY OTHER ENTITY.
 * EACH COPYRIGHT HOLDER DISCLAIMS ANY LIABILITY TO THE USER FOR CLAIMS
 * BROUGHT BY ANY OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL
 * PROPERTY RIGHTS OR OTHERWISE.  AS A CONDITION TO EXERCISING THE RIGHTS
 * GRANTED HEREUNDER, EACH USER HEREBY ASSUMES SOLE RESPONSIBILITY TO SECURE
 * ANY OTHER INTELLECTUAL PROPERTY RIGHTS NEEDED, IF ANY.  THE SOFTWARE
 * IS NOT FAULT-TOLERANT AND IS NOT INTENDED FOR USE IN MISSION-CRITICAL
 * SYSTEMS, SUCH AS THOSE USED IN THE OPERATION OF NUCLEAR FACILITIES,
 * AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL
 * SYSTEMS, DIRECT LIFE SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH
 * THE FAILURE OF THE SOFTWARE OR SYSTEM COULD LEAD DIRECTLY TO DEATH,
 * PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH
 * RISK ACTIVITIES").  THE COPYRIGHT HOLDERS SPECIFICALLY DISCLAIM ANY
 * EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR HIGH RISK ACTIVITIES.
 *
 * __END_OF_JASPER_LICENSE__
 */

/*
 * $Id: jpc_t1cod.c,v 1.2 2008-05-26 09:40:52 vp153 Exp $
 */

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

#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <math.h>

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

#include "jpc_bs.h"
#include "jpc_dec.h"
#include "jpc_cs.h"
#include "jpc_mqcod.h"
#include "jpc_t1cod.h"
#include "jpc_tsfb.h"

double jpc_pow2i(int n);

/******************************************************************************\
* Global data.
\******************************************************************************/

int jpc_zcctxnolut[4 * 256];
int jpc_spblut[256];
int jpc_scctxnolut[256];
int jpc_magctxnolut[4096];

jpc_fix_t jpc_signmsedec[1 << JPC_NMSEDEC_BITS];
jpc_fix_t jpc_refnmsedec[1 << JPC_NMSEDEC_BITS];
jpc_fix_t jpc_signmsedec0[1 << JPC_NMSEDEC_BITS];
jpc_fix_t jpc_refnmsedec0[1 << JPC_NMSEDEC_BITS];

jpc_mqctx_t jpc_mqctxs[JPC_NUMCTXS];

/******************************************************************************\
*
\******************************************************************************/

void jpc_initmqctxs(void);

/******************************************************************************\
* Code.
\******************************************************************************/

int JPC_PASSTYPE(int passno)
{
    int passtype;
    switch (passno % 3) {
    case 0:
        passtype = JPC_CLNPASS;
        break;
    case 1:
        passtype = JPC_SIGPASS;
        break;
    case 2:
        passtype = JPC_REFPASS;
        break;
    default:
        passtype = -1;
        assert(0);
        break;
    }
    return passtype;
}

int JPC_NOMINALGAIN(int qmfbid, int numlvls, int lvlno, int orient)
{
    /* Avoid compiler warnings about unused parameters. */
    numlvls = 0;

if (qmfbid == JPC_COX_INS) {
    return 0;
}
    assert(qmfbid == JPC_COX_RFT);
    if (lvlno == 0) {
        assert(orient == JPC_TSFB_LL);
        return 0;
    } else {
        switch (orient) {
        case JPC_TSFB_LH:
        case JPC_TSFB_HL:
            return 1;
            break;
        case JPC_TSFB_HH:
            return 2;
            break;
        }
    }
    abort();
}

/******************************************************************************\
* Coding pass related functions.
\******************************************************************************/

int JPC_SEGTYPE(int passno, int firstpassno, int bypass)
{
    int passtype;
    if (bypass) {
        passtype = JPC_PASSTYPE(passno);
        if (passtype == JPC_CLNPASS) {
            return JPC_SEG_MQ;
        }
        return ((passno < firstpassno + 10) ? JPC_SEG_MQ : JPC_SEG_RAW);
    } else {
        return JPC_SEG_MQ;
    }
}

int JPC_SEGPASSCNT(int passno, int firstpassno, int numpasses, int bypass, int termall)
{
    int ret;
    int passtype;

    if (termall) {
        ret = 1;
    } else if (bypass) {
        if (passno < firstpassno + 10) {
            ret = 10 - (passno - firstpassno);
        } else {
            passtype = JPC_PASSTYPE(passno);
            switch (passtype) {
            case JPC_SIGPASS:
                ret = 2;
                break;
            case JPC_REFPASS:
                ret = 1;
                break;
            case JPC_CLNPASS:
                ret = 1;
                break;
            default:
                ret = -1;
                assert(0);
                break;
            }
        }
    } else {
        ret = JPC_PREC * 3 - 2;
    }
    ret = JAS_MIN(ret, numpasses - passno);
    return ret;
}

int JPC_ISTERMINATED(int passno, int firstpassno, int numpasses, int termall,
  int lazy)
{
    int ret;
    int n;
    if (passno - firstpassno == numpasses - 1) {
        ret = 1;
    } else {
        n = JPC_SEGPASSCNT(passno, firstpassno, numpasses, lazy, termall);
        ret = (n <= 1) ? 1 : 0;
    }

    return ret;
}

/******************************************************************************\
* Lookup table code.
\******************************************************************************/

void jpc_initluts()
{
    int i;
    int orient;
    int refine;
    float u;
    float v;
    float t;

/* XXX - hack */
jpc_initmqctxs();

    for (orient = 0; orient < 4; ++orient) {
        for (i = 0; i < 256; ++i) {
            jpc_zcctxnolut[(orient << 8) | i] = jpc_getzcctxno(i, orient);
        }
    }

    for (i = 0; i < 256; ++i) {
        jpc_spblut[i] = jpc_getspb(i << 4);
    }

    for (i = 0; i < 256; ++i) {
        jpc_scctxnolut[i] = jpc_getscctxno(i << 4);
    }

    for (refine = 0; refine < 2; ++refine) {
        for (i = 0; i < 2048; ++i) {
            jpc_magctxnolut[(refine << 11) + i] = jpc_getmagctxno((refine ? JPC_REFINE : 0) | i);
        }
    }

    for (i = 0; i < (1 << JPC_NMSEDEC_BITS); ++i) {
        t = i * jpc_pow2i(-JPC_NMSEDEC_FRACBITS);
        u = t;
        v = t - 1.5;
        jpc_signmsedec[i] = jpc_dbltofix(floor((u * u - v * v) * jpc_pow2i(JPC_NMSEDEC_FRACBITS) + 0.5) / jpc_pow2i(JPC_NMSEDEC_FRACBITS));
/* XXX - this calc is not correct */
        jpc_signmsedec0[i] = jpc_dbltofix(floor((u * u) * jpc_pow2i(JPC_NMSEDEC_FRACBITS) + 0.5) / jpc_pow2i(JPC_NMSEDEC_FRACBITS));
        u = t - 1.0;
        if (i & (1 << (JPC_NMSEDEC_BITS - 1))) {
            v = t - 1.5;
        } else {
            v = t - 0.5;
        }
        jpc_refnmsedec[i] = jpc_dbltofix(floor((u * u - v * v) * jpc_pow2i(JPC_NMSEDEC_FRACBITS) + 0.5) / jpc_pow2i(JPC_NMSEDEC_FRACBITS));
/* XXX - this calc is not correct */
        jpc_refnmsedec0[i] = jpc_dbltofix(floor((u * u) * jpc_pow2i(JPC_NMSEDEC_FRACBITS) + 0.5) / jpc_pow2i(JPC_NMSEDEC_FRACBITS));
    }
}

jpc_fix_t jpc_getsignmsedec_func(jpc_fix_t x, int bitpos)
{
    jpc_fix_t y;
    assert(!(x & (~JAS_ONES(bitpos + 1))));
    y = jpc_getsignmsedec_macro(x, bitpos);
    return y;
}

int jpc_getzcctxno(int f, int orient)
{
    int h;
    int v;
    int d;
    int n;
    int t;
    int hv;

    /* Avoid compiler warning. */
    n = 0;

    h = ((f & JPC_WSIG) != 0) + ((f & JPC_ESIG) != 0);
    v = ((f & JPC_NSIG) != 0) + ((f & JPC_SSIG) != 0);
    d = ((f & JPC_NWSIG) != 0) + ((f & JPC_NESIG) != 0) + ((f & JPC_SESIG) != 0) + ((f & JPC_SWSIG) != 0);
    switch (orient) {
    case JPC_TSFB_HL:
        t = h;
        h = v;
        v = t;
    case JPC_TSFB_LL:
    case JPC_TSFB_LH:
        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 JPC_TSFB_HH:
        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;
    }
    assert(n < JPC_NUMZCCTXS);
    return JPC_ZCCTXNO + n;
}

int jpc_getspb(int f)
{
    int hc;
    int vc;
    int n;

    hc = JAS_MIN(((f & (JPC_ESIG | JPC_ESGN)) == JPC_ESIG) + ((f & (JPC_WSIG | JPC_WSGN)) == JPC_WSIG), 1) -
      JAS_MIN(((f & (JPC_ESIG | JPC_ESGN)) == (JPC_ESIG | JPC_ESGN)) + ((f & (JPC_WSIG | JPC_WSGN)) == (JPC_WSIG | JPC_WSGN)), 1);
    vc = JAS_MIN(((f & (JPC_NSIG | JPC_NSGN)) == JPC_NSIG) + ((f & (JPC_SSIG | JPC_SSGN)) == JPC_SSIG), 1) -
      JAS_MIN(((f & (JPC_NSIG | JPC_NSGN)) == (JPC_NSIG | JPC_NSGN)) + ((f & (JPC_SSIG | JPC_SSGN)) == (JPC_SSIG | JPC_SSGN)), 1);
    if (!hc && !vc) {
        n = 0;
    } else {
        n = (!(hc > 0 || (!hc && vc > 0)));
    }
    return n;
}

int jpc_getscctxno(int f)
{
    int hc;
    int vc;
    int n;

    /* Avoid compiler warning. */
    n = 0;

    hc = JAS_MIN(((f & (JPC_ESIG | JPC_ESGN)) == JPC_ESIG) + ((f & (JPC_WSIG | JPC_WSGN)) == JPC_WSIG),
      1) - JAS_MIN(((f & (JPC_ESIG | JPC_ESGN)) == (JPC_ESIG | JPC_ESGN)) +
      ((f & (JPC_WSIG | JPC_WSGN)) == (JPC_WSIG | JPC_WSGN)), 1);
    vc = JAS_MIN(((f & (JPC_NSIG | JPC_NSGN)) == JPC_NSIG) + ((f & (JPC_SSIG | JPC_SSGN)) == JPC_SSIG),
      1) - JAS_MIN(((f & (JPC_NSIG | JPC_NSGN)) == (JPC_NSIG | JPC_NSGN)) +
      ((f & (JPC_SSIG | JPC_SSGN)) == (JPC_SSIG | JPC_SSGN)), 1);
    assert(hc >= -1 && hc <= 1 && vc >= -1 && vc <= 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;
        }
    }
    assert(n < JPC_NUMSCCTXS);
    return JPC_SCCTXNO + n;
}

int jpc_getmagctxno(int f)
{
    int n;

    if (!(f & JPC_REFINE)) {
        n = (f & (JPC_OTHSIGMSK)) ? 1 : 0;
    } else {
        n = 2;
    }

    assert(n < JPC_NUMMAGCTXS);
    return JPC_MAGCTXNO + n;
}

void jpc_initctxs(jpc_mqctx_t *ctxs)
{
    jpc_mqctx_t *ctx;
    int i;

    ctx = ctxs;
    for (i = 0; i < JPC_NUMCTXS; ++i) {
        ctx->mps = 0;
        switch (i) {
        case JPC_UCTXNO:
            ctx->ind = 46;
            break;
        case JPC_ZCCTXNO:
            ctx->ind = 4;
            break;
        case JPC_AGGCTXNO:
            ctx->ind = 3;
            break;
        default:
            ctx->ind = 0;
            break;
        }
        ++ctx;
    }
}

void jpc_initmqctxs()
{
    jpc_initctxs(jpc_mqctxs);
}

/* Calculate the real quantity exp2(n), where x is an integer. */
double jpc_pow2i(int n)
{
    double x;
    double a;

    x = 1.0;
    if (n < 0) {
        a = 0.5;
        n = -n;
    } else {
        a = 2.0;
    }
    while (--n >= 0) {
        x *= a;
    }
    return x;
}