falkTX
/
FFmpeg
mirror of https://github.com/falkTX/FFmpeg.git
1
0
Fork 0
Code Issues 0 Releases 338 Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
53463 Commits
32 Branches
283MB
Tree: e708c7fa21
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from 'e708c7fa21'
${ noResults }
FFmpeg/libavcodec/j2k.c

357 lines
13KB
Raw Blame History 

  1. /*

  2.  * JPEG2000 encoder and decoder common functions

  3.  * Copyright (c) 2007 Kamil Nowosad

  4.  *

  5.  * This file is part of FFmpeg.

  6.  *

  7.  * FFmpeg is free software; you can redistribute it and/or

  8.  * modify it under the terms of the GNU Lesser General Public

  9.  * License as published by the Free Software Foundation; either

  10.  * version 2.1 of the License, or (at your option) any later version.

  11.  *

  12.  * FFmpeg is distributed in the hope that it will be useful,

  13.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  14.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  15.  * Lesser General Public License for more details.

  16.  *

  17.  * You should have received a copy of the GNU Lesser General Public

  18.  * License along with FFmpeg; if not, write to the Free Software

  19.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  20.  */

  21. 

  22. /**

  23.  * JPEG2000 image encoder and decoder common functions

  24.  * @file

  25.  * @author Kamil Nowosad

  26.  */

  27. 

  28. 

  29. #include "avcodec.h"

  30. #include "j2k.h"

  31. 

  32. #define SHL(a, n) ((n)>=0 ? (a) << (n) : (a) >> -(n))

  33. 

  34. /* tag tree routines */

  35. 

  36. /** allocate the memory for tag tree */

  37. 

  38. static int tag_tree_size(int w, int h)

  39. {

  40.     int res = 0;

  41.     while (w > 1 || h > 1){

  42.         res += w * h;

  43.         w = (w+1) >> 1;

  44.         h = (h+1) >> 1;

  45.     }

  46.     return res + 1;

  47. }

  48. 

  49. Jpeg2000TgtNode *ff_j2k_tag_tree_init(int w, int h)

  50. {

  51.     int pw = w, ph = h;

  52.     Jpeg2000TgtNode *res, *t, *t2;

  53. 

  54.     t = res = av_mallocz(tag_tree_size(w, h)*sizeof(Jpeg2000TgtNode));

  55. 

  56.     if (res == NULL)

  57.         return NULL;

  58. 

  59.     while (w > 1 || h > 1){

  60.         int i, j;

  61.         pw = w;

  62.         ph = h;

  63. 

  64.         w = (w+1) >> 1;

  65.         h = (h+1) >> 1;

  66.         t2 = t + pw*ph;

  67. 

  68.         for (i = 0; i < ph; i++)

  69.             for (j = 0; j < pw; j++){

  70.                 t[i*pw + j].parent = &t2[(i>>1)*w + (j>>1)];

  71.             }

  72.         t = t2;

  73.     }

  74.     t[0].parent = NULL;

  75.     return res;

  76. }

  77. 

  78. static void tag_tree_zero(Jpeg2000TgtNode *t, int w, int h)

  79. {

  80.     int i, siz = tag_tree_size(w, h);

  81. 

  82.     for (i = 0; i < siz; i++){

  83.         t[i].val = 0;

  84.         t[i].vis = 0;

  85.     }

  86. }

  87. 

  88. static int getsigctxno(int flag, int bandno)

  89. {

  90.     int h, v, d;

  91. 

  92.     h = ((flag & JPEG2000_T1_SIG_E)  ? 1 : 0) +

  93.         ((flag & JPEG2000_T1_SIG_W)  ? 1 : 0);

  94.     v = ((flag & JPEG2000_T1_SIG_N)  ? 1 : 0) +

  95.         ((flag & JPEG2000_T1_SIG_S)  ? 1 : 0);

  96.     d = ((flag & JPEG2000_T1_SIG_NE) ? 1 : 0) +

  97.         ((flag & JPEG2000_T1_SIG_NW) ? 1 : 0) +

  98.         ((flag & JPEG2000_T1_SIG_SE) ? 1 : 0) +

  99.         ((flag & JPEG2000_T1_SIG_SW) ? 1 : 0);

  100. 

  101.     if (bandno < 3){

  102.         if (bandno == 1)

  103.             FFSWAP(int, h, v);

  104.         if (h == 2) return 8;

  105.         if (h == 1){

  106.             if (v >= 1) return 7;

  107.             if (d >= 1) return 6;

  108.             return 5;

  109.         }

  110.         if (v == 2) return 4;

  111.         if (v == 1) return 3;

  112.         if (d >= 2) return 2;

  113.         if (d == 1) return 1;

  114.     } else{

  115.         if (d >= 3) return 8;

  116.         if (d == 2){

  117.             if (h+v >= 1) return 7;

  118.             return 6;

  119.         }

  120.         if (d == 1){

  121.             if (h+v >= 2) return 5;

  122.             if (h+v == 1) return 4;

  123.             return 3;

  124.         }

  125.         if (h+v >= 2) return 2;

  126.         if (h+v == 1) return 1;

  127.     }

  128.     return 0;

  129. }

  130. 

  131. static int getsgnctxno(int flag, uint8_t *xorbit)

  132. {

  133.     int vcontrib, hcontrib;

  134.     static const int contribtab[3][3] = {{0, -1, 1}, {-1, -1, 0}, {1, 0, 1}};

  135.     static const int ctxlbltab[3][3] = {{13, 12, 11}, {10, 9, 10}, {11, 12, 13}};

  136.     static const int xorbittab[3][3] = {{1, 1, 1,}, {1, 0, 0}, {0, 0, 0}};

  137. 

  138.     hcontrib = contribtab[flag & JPEG2000_T1_SIG_E ? flag & JPEG2000_T1_SGN_E ? 1:2:0]

  139.                          [flag & JPEG2000_T1_SIG_W ? flag & JPEG2000_T1_SGN_W ? 1:2:0]+1;

  140.     vcontrib = contribtab[flag & JPEG2000_T1_SIG_S ? flag & JPEG2000_T1_SGN_S ? 1:2:0]

  141.                          [flag & JPEG2000_T1_SIG_N ? flag & JPEG2000_T1_SGN_N ? 1:2:0]+1;

  142.     *xorbit = xorbittab[hcontrib][vcontrib];

  143.     return ctxlbltab[hcontrib][vcontrib];

  144. }

  145. 

  146. void ff_j2k_set_significant(Jpeg2000T1Context *t1, int x, int y, int negative)

  147. {

  148.     x++; y++;

  149.     t1->flags[y][x] |= JPEG2000_T1_SIG;

  150.     if (negative){

  151.         t1->flags[y][x+1] |= JPEG2000_T1_SIG_W | JPEG2000_T1_SGN_W;

  152.         t1->flags[y][x-1] |= JPEG2000_T1_SIG_E | JPEG2000_T1_SGN_E;

  153.         t1->flags[y+1][x] |= JPEG2000_T1_SIG_N | JPEG2000_T1_SGN_N;

  154.         t1->flags[y-1][x] |= JPEG2000_T1_SIG_S | JPEG2000_T1_SGN_S;

  155.     } else{

  156.         t1->flags[y][x+1] |= JPEG2000_T1_SIG_W;

  157.         t1->flags[y][x-1] |= JPEG2000_T1_SIG_E;

  158.         t1->flags[y+1][x] |= JPEG2000_T1_SIG_N;

  159.         t1->flags[y-1][x] |= JPEG2000_T1_SIG_S;

  160.     }

  161.     t1->flags[y+1][x+1] |= JPEG2000_T1_SIG_NW;

  162.     t1->flags[y+1][x-1] |= JPEG2000_T1_SIG_NE;

  163.     t1->flags[y-1][x+1] |= JPEG2000_T1_SIG_SW;

  164.     t1->flags[y-1][x-1] |= JPEG2000_T1_SIG_SE;

  165. }

  166. 

  167. int ff_j2k_init_component(Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty, Jpeg2000QuantStyle *qntsty, int cbps, int dx, int dy)

  168. {

  169.     int reslevelno, bandno, gbandno = 0, ret, i, j, csize = 1;

  170. 

  171.     if (ret=ff_j2k_dwt_init(&comp->dwt, comp->coord, codsty->nreslevels-1, codsty->transform))

  172.         return ret;

  173.     for (i = 0; i < 2; i++)

  174.         csize *= comp->coord[i][1] - comp->coord[i][0];

  175. 

  176.     comp->data = av_malloc(csize * sizeof(int));

  177.     if (!comp->data)

  178.         return AVERROR(ENOMEM);

  179.     comp->reslevel = av_malloc(codsty->nreslevels * sizeof(Jpeg2000ResLevel));

  180. 

  181.     if (!comp->reslevel)

  182.         return AVERROR(ENOMEM);

  183.     for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++){

  184.         int declvl = codsty->nreslevels - reslevelno;

  185.         Jpeg2000ResLevel *reslevel = comp->reslevel + reslevelno;

  186. 

  187.         for (i = 0; i < 2; i++)

  188.             for (j = 0; j < 2; j++)

  189.                 reslevel->coord[i][j] =

  190.                     ff_jpeg2000_ceildivpow2(comp->coord[i][j], declvl - 1);

  191. 

  192.         if (reslevelno == 0)

  193.             reslevel->nbands = 1;

  194.         else

  195.             reslevel->nbands = 3;

  196. 

  197.         if (reslevel->coord[0][1] == reslevel->coord[0][0])

  198.             reslevel->num_precincts_x = 0;

  199.         else

  200.             reslevel->num_precincts_x = ff_jpeg2000_ceildivpow2(reslevel->coord[0][1], codsty->log2_prec_width)

  201.                                         - (reslevel->coord[0][0] >> codsty->log2_prec_width);

  202. 

  203.         if (reslevel->coord[1][1] == reslevel->coord[1][0])

  204.             reslevel->num_precincts_y = 0;

  205.         else

  206.             reslevel->num_precincts_y = ff_jpeg2000_ceildivpow2(reslevel->coord[1][1], codsty->log2_prec_height)

  207.                                         - (reslevel->coord[1][0] >> codsty->log2_prec_height);

  208. 

  209.         reslevel->band = av_malloc(reslevel->nbands * sizeof(Jpeg2000Band));

  210.         if (!reslevel->band)

  211.             return AVERROR(ENOMEM);

  212.         for (bandno = 0; bandno < reslevel->nbands; bandno++, gbandno++){

  213.             Jpeg2000Band *band = reslevel->band + bandno;

  214.             int cblkno, precx, precy, precno;

  215.             int x0, y0, x1, y1;

  216.             int xi0, yi0, xi1, yi1;

  217.             int cblkperprecw, cblkperprech;

  218. 

  219.             if (qntsty->quantsty != JPEG2000_QSTY_NONE){

  220.                 static const uint8_t lut_gain[2][4] = {{0, 0, 0, 0}, {0, 1, 1, 2}};

  221.                 int numbps;

  222. 

  223.                 numbps = cbps + lut_gain[codsty->transform][bandno + reslevelno>0];

  224.                 band->stepsize = SHL(2048 + qntsty->mant[gbandno], 2 + numbps - qntsty->expn[gbandno]);

  225.             } else

  226.                 band->stepsize = 1 << 13;

  227. 

  228.             if (reslevelno == 0){  // the same everywhere

  229.                 band->codeblock_width = 1 << FFMIN(codsty->log2_cblk_width, codsty->log2_prec_width-1);

  230.                 band->codeblock_height = 1 << FFMIN(codsty->log2_cblk_height, codsty->log2_prec_height-1);

  231.                 for (i = 0; i < 2; i++)

  232.                     for (j = 0; j < 2; j++)

  233.                         band->coord[i][j] = ff_jpeg2000_ceildivpow2(comp->coord[i][j], declvl-1);

  234.             } else{

  235.                 band->codeblock_width = 1 << FFMIN(codsty->log2_cblk_width, codsty->log2_prec_width);

  236.                 band->codeblock_height = 1 << FFMIN(codsty->log2_cblk_height, codsty->log2_prec_height);

  237. 

  238.                 for (i = 0; i < 2; i++)

  239.                     for (j = 0; j < 2; j++)

  240.                         band->coord[i][j] = ff_jpeg2000_ceildivpow2(comp->coord[i][j] - (((bandno+1>>i)&1) << declvl-1), declvl);

  241.             }

  242.             band->cblknx = ff_jpeg2000_ceildiv(band->coord[0][1], band->codeblock_width)  - band->coord[0][0] / band->codeblock_width;

  243.             band->cblkny = ff_jpeg2000_ceildiv(band->coord[1][1], band->codeblock_height) - band->coord[1][0] / band->codeblock_height;

  244. 

  245.             for (j = 0; j < 2; j++)

  246.                 band->coord[0][j] = ff_jpeg2000_ceildiv(band->coord[0][j], dx);

  247.             for (j = 0; j < 2; j++)

  248.                 band->coord[1][j] = ff_jpeg2000_ceildiv(band->coord[1][j], dy);

  249. 

  250.             band->cblknx = ff_jpeg2000_ceildiv(band->cblknx, dx);

  251.             band->cblkny = ff_jpeg2000_ceildiv(band->cblkny, dy);

  252. 

  253.             band->cblk = av_malloc(sizeof(Jpeg2000Cblk) * band->cblknx * band->cblkny);

  254.             if (!band->cblk)

  255.                 return AVERROR(ENOMEM);

  256.             band->prec = av_malloc(sizeof(Jpeg2000Cblk) * reslevel->num_precincts_x * reslevel->num_precincts_y);

  257.             if (!band->prec)

  258.                 return AVERROR(ENOMEM);

  259. 

  260.             for (cblkno = 0; cblkno < band->cblknx * band->cblkny; cblkno++){

  261.                 Jpeg2000Cblk *cblk = band->cblk + cblkno;

  262.                 cblk->zero = 0;

  263.                 cblk->lblock = 3;

  264.                 cblk->length = 0;

  265.                 cblk->lengthinc = 0;

  266.                 cblk->npasses = 0;

  267.             }

  268. 

  269.             y0 = band->coord[1][0];

  270.             y1 = ((band->coord[1][0] + (1<<codsty->log2_prec_height)) & ~((1<<codsty->log2_prec_height)-1)) - y0;

  271.             yi0 = 0;

  272.             yi1 = ff_jpeg2000_ceildivpow2(y1 - y0, codsty->log2_cblk_height) << codsty->log2_cblk_height;

  273.             yi1 = FFMIN(yi1, band->cblkny);

  274.             cblkperprech = 1<<(codsty->log2_prec_height - codsty->log2_cblk_height);

  275.             for (precy = 0, precno = 0; precy < reslevel->num_precincts_y; precy++){

  276.                 for (precx = 0; precx < reslevel->num_precincts_x; precx++, precno++){

  277.                     band->prec[precno].yi0 = yi0;

  278.                     band->prec[precno].yi1 = yi1;

  279.                 }

  280.                 yi1 += cblkperprech;

  281.                 yi0 = yi1 - cblkperprech;

  282.                 yi1 = FFMIN(yi1, band->cblkny);

  283.             }

  284.             x0 = band->coord[0][0];

  285.             x1 = ((band->coord[0][0] + (1<<codsty->log2_prec_width)) & ~((1<<codsty->log2_prec_width)-1)) - x0;

  286.             xi0 = 0;

  287.             xi1 = ff_jpeg2000_ceildivpow2(x1 - x0, codsty->log2_cblk_width) << codsty->log2_cblk_width;

  288.             xi1 = FFMIN(xi1, band->cblknx);

  289. 

  290.             cblkperprecw = 1<<(codsty->log2_prec_width - codsty->log2_cblk_width);

  291.             for (precx = 0, precno = 0; precx < reslevel->num_precincts_x; precx++){

  292.                 for (precy = 0; precy < reslevel->num_precincts_y; precy++, precno = 0){

  293.                     Jpeg2000Prec *prec = band->prec + precno;

  294.                     prec->xi0 = xi0;

  295.                     prec->xi1 = xi1;

  296.                     prec->cblkincl = ff_j2k_tag_tree_init(prec->xi1 - prec->xi0,

  297.                                                           prec->yi1 - prec->yi0);

  298.                     prec->zerobits = ff_j2k_tag_tree_init(prec->xi1 - prec->xi0,

  299.                                                           prec->yi1 - prec->yi0);

  300.                     if (!prec->cblkincl || !prec->zerobits)

  301.                         return AVERROR(ENOMEM);

  302. 

  303.                 }

  304.                 xi1 += cblkperprecw;

  305.                 xi0 = xi1 - cblkperprecw;

  306.                 xi1 = FFMIN(xi1, band->cblknx);

  307.             }

  308.         }

  309.     }

  310.     return 0;

  311. }

  312. 

  313. void ff_j2k_reinit(Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty)

  314. {

  315.     int reslevelno, bandno, cblkno, precno;

  316.     for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++){

  317.         Jpeg2000ResLevel *rlevel = comp->reslevel + reslevelno;

  318.         for (bandno = 0; bandno < rlevel->nbands; bandno++){

  319.             Jpeg2000Band *band = rlevel->band + bandno;

  320.             for(precno = 0; precno < rlevel->num_precincts_x * rlevel->num_precincts_y; precno++){

  321.                 Jpeg2000Prec *prec = band->prec + precno;

  322.                 tag_tree_zero(prec->zerobits, prec->xi1 - prec->xi0, prec->yi1 - prec->yi0);

  323.                 tag_tree_zero(prec->cblkincl, prec->xi1 - prec->xi0, prec->yi1 - prec->yi0);

  324.             }

  325.             for (cblkno = 0; cblkno < band->cblknx * band->cblkny; cblkno++){

  326.                 Jpeg2000Cblk *cblk = band->cblk + cblkno;

  327.                 cblk->length = 0;

  328.                 cblk->lblock = 3;

  329.             }

  330.         }

  331.     }

  332. }

  333. 

  334. void ff_j2k_cleanup(Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty)

  335. {

  336.     int reslevelno, bandno, precno;

  337.     for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++){

  338.         Jpeg2000ResLevel *reslevel = comp->reslevel + reslevelno;

  339. 

  340.         for (bandno = 0; bandno < reslevel->nbands ; bandno++){

  341.             Jpeg2000Band *band = reslevel->band + bandno;

  342.                 for (precno = 0; precno < reslevel->num_precincts_x * reslevel->num_precincts_y; precno++){

  343.                     Jpeg2000Prec *prec = band->prec + precno;

  344.                     av_freep(&prec->zerobits);

  345.                     av_freep(&prec->cblkincl);

  346.                 }

  347.                 av_freep(&band->cblk);

  348.                 av_freep(&band->prec);

  349.             }

  350.         av_freep(&reslevel->band);

  351.     }

  352. 

  353.     ff_j2k_dwt_destroy(&comp->dwt);

  354.     av_freep(&comp->reslevel);

  355.     av_freep(&comp->data);

  356. }