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FFmpeg/libavcodec/j2kenc.c

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  1. /*

  2.  * JPEG2000 image encoder

  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

  24.  * @file

  25.  * @author Kamil Nowosad

  26.  */

  27. 

  28. #include <float.h>

  29. #include "avcodec.h"

  30. #include "bytestream.h"

  31. #include "j2k.h"

  32. #include "libavutil/common.h"

  33. 

  34. #define NMSEDEC_BITS 7

  35. #define NMSEDEC_FRACBITS (NMSEDEC_BITS-1)

  36. #define WMSEDEC_SHIFT 13 ///< must be >= 13

  37. #define LAMBDA_SCALE (100000000LL << (WMSEDEC_SHIFT - 13))

  38. 

  39. static int lut_nmsedec_ref [1<<NMSEDEC_BITS],

  40.            lut_nmsedec_ref0[1<<NMSEDEC_BITS],

  41.            lut_nmsedec_sig [1<<NMSEDEC_BITS],

  42.            lut_nmsedec_sig0[1<<NMSEDEC_BITS];

  43. 

  44. static const int dwt_norms[2][4][10] = { // [dwt_type][band][rlevel] (multiplied by 10000)

  45.     {{10000, 19650, 41770,  84030, 169000, 338400,  676900, 1353000, 2706000, 5409000},

  46.      {20220, 39890, 83550, 170400, 342700, 686300, 1373000, 2746000, 5490000},

  47.      {20220, 39890, 83550, 170400, 342700, 686300, 1373000, 2746000, 5490000},

  48.      {20800, 38650, 83070, 171800, 347100, 695900, 1393000, 2786000, 5572000}},

  49. 

  50.     {{10000, 15000, 27500, 53750, 106800, 213400, 426700, 853300, 1707000, 3413000},

  51.      {10380, 15920, 29190, 57030, 113300, 226400, 452500, 904800, 1809000},

  52.      {10380, 15920, 29190, 57030, 113300, 226400, 452500, 904800, 1809000},

  53.      { 7186,  9218, 15860, 30430,  60190, 120100, 240000, 479700,  959300}}

  54. };

  55. 

  56. typedef struct {

  57.    J2kComponent *comp;

  58. } J2kTile;

  59. 

  60. typedef struct {

  61.     AVCodecContext *avctx;

  62.     AVFrame *picture;

  63. 

  64.     int width, height; ///< image width and height

  65.     uint8_t cbps[4]; ///< bits per sample in particular components

  66.     int chroma_shift[2];

  67.     uint8_t planar;

  68.     int ncomponents;

  69.     int tile_width, tile_height; ///< tile size

  70.     int numXtiles, numYtiles;

  71. 

  72.     uint8_t *buf_start;

  73.     uint8_t *buf;

  74.     uint8_t *buf_end;

  75.     int bit_index;

  76. 

  77.     int64_t lambda;

  78. 

  79.     J2kCodingStyle codsty;

  80.     J2kQuantStyle  qntsty;

  81. 

  82.     J2kTile *tile;

  83. } J2kEncoderContext;

  84. 

  85. 

  86. /* debug */

  87. #if 0

  88. #undef ifprintf

  89. #undef printf

  90. 

  91. static void nspaces(FILE *fd, int n)

  92. {

  93.     while(n--) putc(' ', fd);

  94. }

  95. 

  96. static void printv(int *tab, int l)

  97. {

  98.     int i;

  99.     for (i = 0; i < l; i++)

  100.         printf("%.3d ", tab[i]);

  101.     printf("\n");

  102. }

  103. 

  104. static void printu(uint8_t *tab, int l)

  105. {

  106.     int i;

  107.     for (i = 0; i < l; i++)

  108.         printf("%.3hd ", tab[i]);

  109.     printf("\n");

  110. }

  111. 

  112. static void printcomp(J2kComponent *comp)

  113. {

  114.     int i;

  115.     for (i = 0; i < comp->y1 - comp->y0; i++)

  116.         printv(comp->data + i * (comp->x1 - comp->x0), comp->x1 - comp->x0);

  117. }

  118. 

  119. static void dump(J2kEncoderContext *s, FILE *fd)

  120. {

  121.     int tileno, compno, reslevelno, bandno, precno;

  122.     fprintf(fd, "XSiz = %d, YSiz = %d, tile_width = %d, tile_height = %d\n"

  123.                 "numXtiles = %d, numYtiles = %d, ncomponents = %d\n"

  124.                 "tiles:\n",

  125.             s->width, s->height, s->tile_width, s->tile_height,

  126.             s->numXtiles, s->numYtiles, s->ncomponents);

  127.     for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++){

  128.         J2kTile *tile = s->tile + tileno;

  129.         nspaces(fd, 2);

  130.         fprintf(fd, "tile %d:\n", tileno);

  131.         for(compno = 0; compno < s->ncomponents; compno++){

  132.             J2kComponent *comp = tile->comp + compno;

  133.             nspaces(fd, 4);

  134.             fprintf(fd, "component %d:\n", compno);

  135.             nspaces(fd, 4);

  136.             fprintf(fd, "x0 = %d, x1 = %d, y0 = %d, y1 = %d\n",

  137.                         comp->x0, comp->x1, comp->y0, comp->y1);

  138.             for(reslevelno = 0; reslevelno < s->nreslevels; reslevelno++){

  139.                 J2kResLevel *reslevel = comp->reslevel + reslevelno;

  140.                 nspaces(fd, 6);

  141.                 fprintf(fd, "reslevel %d:\n", reslevelno);

  142.                 nspaces(fd, 6);

  143.                 fprintf(fd, "x0 = %d, x1 = %d, y0 = %d, y1 = %d, nbands = %d\n",

  144.                         reslevel->x0, reslevel->x1, reslevel->y0,

  145.                         reslevel->y1, reslevel->nbands);

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

  147.                     J2kBand *band = reslevel->band + bandno;

  148.                     nspaces(fd, 8);

  149.                     fprintf(fd, "band %d:\n", bandno);

  150.                     nspaces(fd, 8);

  151.                     fprintf(fd, "x0 = %d, x1 = %d, y0 = %d, y1 = %d,"

  152.                                 "codeblock_width = %d, codeblock_height = %d cblknx = %d cblkny = %d\n",

  153.                                 band->x0, band->x1,

  154.                                 band->y0, band->y1,

  155.                                 band->codeblock_width, band->codeblock_height,

  156.                                 band->cblknx, band->cblkny);

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

  158.                         J2kPrec *prec = band->prec + precno;

  159.                         nspaces(fd, 10);

  160.                         fprintf(fd, "prec %d:\n", precno);

  161.                         nspaces(fd, 10);

  162.                         fprintf(fd, "xi0 = %d, xi1 = %d, yi0 = %d, yi1 = %d\n",

  163.                                      prec->xi0, prec->xi1, prec->yi0, prec->yi1);

  164.                     }

  165.                 }

  166.             }

  167.         }

  168.     }

  169. }

  170. #endif

  171. 

  172. /* bitstream routines */

  173. 

  174. /** put n times val bit */

  175. static void put_bits(J2kEncoderContext *s, int val, int n) // TODO: optimize

  176. {

  177.     while (n-- > 0){

  178.         if (s->bit_index == 8)

  179.         {

  180.             s->bit_index = *s->buf == 0xff;

  181.             *(++s->buf) = 0;

  182.         }

  183.         *s->buf |= val << (7 - s->bit_index++);

  184.     }

  185. }

  186. 

  187. /** put n least significant bits of a number num */

  188. static void put_num(J2kEncoderContext *s, int num, int n)

  189. {

  190.     while(--n >= 0)

  191.         put_bits(s, (num >> n) & 1, 1);

  192. }

  193. 

  194. /** flush the bitstream */

  195. static void j2k_flush(J2kEncoderContext *s)

  196. {

  197.     if (s->bit_index){

  198.         s->bit_index = 0;

  199.         s->buf++;

  200.     }

  201. }

  202. 

  203. /* tag tree routines */

  204. 

  205. /** code the value stored in node */

  206. static void tag_tree_code(J2kEncoderContext *s, J2kTgtNode *node, int threshold)

  207. {

  208.     J2kTgtNode *stack[30];

  209.     int sp = 1, curval = 0;

  210.     stack[0] = node;

  211. 

  212.     node = node->parent;

  213.     while(node){

  214.         if (node->vis){

  215.             curval = node->val;

  216.             break;

  217.         }

  218.         node->vis++;

  219.         stack[sp++] = node;

  220.         node = node->parent;

  221.     }

  222.     while(--sp >= 0){

  223.         if (stack[sp]->val >= threshold){

  224.             put_bits(s, 0, threshold - curval);

  225.             break;

  226.         }

  227.         put_bits(s, 0, stack[sp]->val - curval);

  228.         put_bits(s, 1, 1);

  229.         curval = stack[sp]->val;

  230.     }

  231. }

  232. 

  233. /** update the value in node */

  234. static void tag_tree_update(J2kTgtNode *node)

  235. {

  236.     int lev = 0;

  237.     while (node->parent){

  238.         if (node->parent->val <= node->val)

  239.             break;

  240.         node->parent->val = node->val;

  241.         node = node->parent;

  242.         lev++;

  243.     }

  244. }

  245. 

  246. static int put_siz(J2kEncoderContext *s)

  247. {

  248.     int i;

  249. 

  250.     if (s->buf_end - s->buf < 40 + 3 * s->ncomponents)

  251.         return -1;

  252. 

  253.     bytestream_put_be16(&s->buf, J2K_SIZ);

  254.     bytestream_put_be16(&s->buf, 38 + 3 * s->ncomponents); // Lsiz

  255.     bytestream_put_be16(&s->buf, 0); // Rsiz

  256.     bytestream_put_be32(&s->buf, s->width); // width

  257.     bytestream_put_be32(&s->buf, s->height); // height

  258.     bytestream_put_be32(&s->buf, 0); // X0Siz

  259.     bytestream_put_be32(&s->buf, 0); // Y0Siz

  260. 

  261.     bytestream_put_be32(&s->buf, s->tile_width); // XTSiz

  262.     bytestream_put_be32(&s->buf, s->tile_height); // YTSiz

  263.     bytestream_put_be32(&s->buf, 0); // XT0Siz

  264.     bytestream_put_be32(&s->buf, 0); // YT0Siz

  265.     bytestream_put_be16(&s->buf, s->ncomponents); // CSiz

  266. 

  267.     for (i = 0; i < s->ncomponents; i++){ // Ssiz_i XRsiz_i, YRsiz_i

  268.         bytestream_put_byte(&s->buf, 7);

  269.         bytestream_put_byte(&s->buf, i?1<<s->chroma_shift[0]:1);

  270.         bytestream_put_byte(&s->buf, i?1<<s->chroma_shift[1]:1);

  271.     }

  272.     return 0;

  273. }

  274. 

  275. static int put_cod(J2kEncoderContext *s)

  276. {

  277.     J2kCodingStyle *codsty = &s->codsty;

  278. 

  279.     if (s->buf_end - s->buf < 14)

  280.         return -1;

  281. 

  282.     bytestream_put_be16(&s->buf, J2K_COD);

  283.     bytestream_put_be16(&s->buf, 12); // Lcod

  284.     bytestream_put_byte(&s->buf, 0);  // Scod

  285.     // SGcod

  286.     bytestream_put_byte(&s->buf, 0); // progression level

  287.     bytestream_put_be16(&s->buf, 1); // num of layers

  288.     bytestream_put_byte(&s->buf, 0); // multiple component transformation

  289.     // SPcod

  290.     bytestream_put_byte(&s->buf, codsty->nreslevels - 1); // num of decomp. levels

  291.     bytestream_put_byte(&s->buf, codsty->log2_cblk_width-2); // cblk width

  292.     bytestream_put_byte(&s->buf, codsty->log2_cblk_height-2); // cblk height

  293.     bytestream_put_byte(&s->buf, 0); // cblk style

  294.     bytestream_put_byte(&s->buf, codsty->transform); // transformation

  295.     return 0;

  296. }

  297. 

  298. static int put_qcd(J2kEncoderContext *s, int compno)

  299. {

  300.     int i, size;

  301.     J2kCodingStyle *codsty = &s->codsty;

  302.     J2kQuantStyle  *qntsty = &s->qntsty;

  303. 

  304.     if (qntsty->quantsty == J2K_QSTY_NONE)

  305.         size = 4 + 3 * (codsty->nreslevels-1);

  306.     else // QSTY_SE

  307.         size = 5 + 6 * (codsty->nreslevels-1);

  308. 

  309.     if (s->buf_end - s->buf < size + 2)

  310.         return -1;

  311. 

  312.     bytestream_put_be16(&s->buf, J2K_QCD);

  313.     bytestream_put_be16(&s->buf, size);  // LQcd

  314.     bytestream_put_byte(&s->buf, (qntsty->nguardbits << 5) | qntsty->quantsty);  // Sqcd

  315.     if (qntsty->quantsty == J2K_QSTY_NONE)

  316.         for (i = 0; i < codsty->nreslevels * 3 - 2; i++)

  317.             bytestream_put_byte(&s->buf, qntsty->expn[i] << 3);

  318.     else // QSTY_SE

  319.         for (i = 0; i < codsty->nreslevels * 3 - 2; i++)

  320.             bytestream_put_be16(&s->buf, (qntsty->expn[i] << 11) | qntsty->mant[i]);

  321.     return 0;

  322. }

  323. 

  324. static uint8_t *put_sot(J2kEncoderContext *s, int tileno)

  325. {

  326.     uint8_t *psotptr;

  327. 

  328.     if (s->buf_end - s->buf < 12)

  329.         return -1;

  330. 

  331.     bytestream_put_be16(&s->buf, J2K_SOT);

  332.     bytestream_put_be16(&s->buf, 10); // Lsot

  333.     bytestream_put_be16(&s->buf, tileno); // Isot

  334. 

  335.     psotptr = s->buf;

  336.     bytestream_put_be32(&s->buf, 0); // Psot (filled in later)

  337. 

  338.     bytestream_put_byte(&s->buf, 0); // TPsot

  339.     bytestream_put_byte(&s->buf, 1); // TNsot

  340.     return psotptr;

  341. }

  342. 

  343. /**

  344.  * compute the sizes of tiles, resolution levels, bands, etc.

  345.  * allocate memory for them

  346.  * divide the input image into tile-components

  347.  */

  348. static int init_tiles(J2kEncoderContext *s)

  349. {

  350.     int tileno, tilex, tiley, compno;

  351.     J2kCodingStyle *codsty = &s->codsty;

  352.     J2kQuantStyle  *qntsty = &s->qntsty;

  353. 

  354.     s->numXtiles = ff_j2k_ceildiv(s->width, s->tile_width);

  355.     s->numYtiles = ff_j2k_ceildiv(s->height, s->tile_height);

  356. 

  357.     s->tile = av_malloc(s->numXtiles * s->numYtiles * sizeof(J2kTile));

  358.     if (!s->tile)

  359.         return AVERROR(ENOMEM);

  360.     for (tileno = 0, tiley = 0; tiley < s->numYtiles; tiley++)

  361.         for (tilex = 0; tilex < s->numXtiles; tilex++, tileno++){

  362.             J2kTile *tile = s->tile + tileno;

  363. 

  364.             tile->comp = av_malloc(s->ncomponents * sizeof(J2kComponent));

  365.             if (!tile->comp)

  366.                 return AVERROR(ENOMEM);

  367.             for (compno = 0; compno < s->ncomponents; compno++){

  368.                 J2kComponent *comp = tile->comp + compno;

  369.                 int ret, i, j;

  370. 

  371.                 comp->coord[0][0] = tilex * s->tile_width;

  372.                 comp->coord[0][1] = FFMIN((tilex+1)*s->tile_width, s->width);

  373.                 comp->coord[1][0] = tiley * s->tile_height;

  374.                 comp->coord[1][1] = FFMIN((tiley+1)*s->tile_height, s->height);

  375.                 if (compno > 0)

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

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

  378.                             comp->coord[i][j] = ff_j2k_ceildivpow2(comp->coord[i][j], s->chroma_shift[i]);

  379. 

  380.                 if (ret = ff_j2k_init_component(comp, codsty, qntsty, s->cbps[compno]))

  381.                     return ret;

  382.             }

  383.         }

  384.     return 0;

  385. }

  386. 

  387. static void copy_frame(J2kEncoderContext *s)

  388. {

  389.     int tileno, compno, i, y, x;

  390.     uint8_t *line;

  391.     for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++){

  392.         J2kTile *tile = s->tile + tileno;

  393.         if (s->planar){

  394.             for (compno = 0; compno < s->ncomponents; compno++){

  395.                 J2kComponent *comp = tile->comp + compno;

  396.                 int *dst = comp->data;

  397.                 line = s->picture->data[compno]

  398.                        + comp->coord[1][0] * s->picture->linesize[compno]

  399.                        + comp->coord[0][0];

  400.                 for (y = comp->coord[1][0]; y < comp->coord[1][1]; y++){

  401.                     uint8_t *ptr = line;

  402.                     for (x = comp->coord[0][0]; x < comp->coord[0][1]; x++)

  403.                         *dst++ = *ptr++ - (1 << 7);

  404.                     line += s->picture->linesize[compno];

  405.                 }

  406.             }

  407.         } else{

  408.             line = s->picture->data[0] + tile->comp[0].coord[1][0] * s->picture->linesize[0]

  409.                    + tile->comp[0].coord[0][0] * s->ncomponents;

  410. 

  411.             i = 0;

  412.             for (y = tile->comp[0].coord[1][0]; y < tile->comp[0].coord[1][1]; y++){

  413.                 uint8_t *ptr = line;

  414.                 for (x = tile->comp[0].coord[0][0]; x < tile->comp[0].coord[0][1]; x++, i++){

  415.                     for (compno = 0; compno < s->ncomponents; compno++){

  416.                         tile->comp[compno].data[i] = *ptr++  - (1 << 7);

  417.                     }

  418.                 }

  419.                 line += s->picture->linesize[0];

  420.             }

  421.         }

  422.     }

  423. }

  424. 

  425. static void init_quantization(J2kEncoderContext *s)

  426. {

  427.     int compno, reslevelno, bandno;

  428.     J2kQuantStyle  *qntsty = &s->qntsty;

  429.     J2kCodingStyle *codsty = &s->codsty;

  430. 

  431.     for (compno = 0; compno < s->ncomponents; compno++){

  432.         int gbandno = 0;

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

  434.             int nbands, lev = codsty->nreslevels - reslevelno - 1;

  435.             nbands = reslevelno ? 3 : 1;

  436.             for (bandno = 0; bandno < nbands; bandno++, gbandno++){

  437.                 int expn, mant;

  438. 

  439.                 if (codsty->transform == FF_DWT97){

  440.                     int bandpos = bandno + (reslevelno>0),

  441.                         ss = 81920000 / dwt_norms[0][bandpos][lev],

  442.                         log = av_log2(ss);

  443.                     mant = (11 - log < 0 ? ss >> log - 11 : ss << 11 - log) & 0x7ff;

  444.                     expn = s->cbps[compno] - log + 13;

  445.                 } else

  446.                     expn = ((bandno&2)>>1) + (reslevelno>0) + s->cbps[compno];

  447. 

  448.                 qntsty->expn[gbandno] = expn;

  449.                 qntsty->mant[gbandno] = mant;

  450.             }

  451.         }

  452.     }

  453. }

  454. 

  455. static void init_luts()

  456. {

  457.     int i, a,

  458.         mask = ~((1<<NMSEDEC_FRACBITS)-1);

  459. 

  460.     for (i = 0; i < (1 << NMSEDEC_BITS); i++){

  461.         lut_nmsedec_sig[i]  = FFMAX(6*i - (9<<NMSEDEC_FRACBITS-1) << 12-NMSEDEC_FRACBITS, 0);

  462.         lut_nmsedec_sig0[i] = FFMAX((i*i + (1<<NMSEDEC_FRACBITS-1) & mask) << 1, 0);

  463. 

  464.         a = (i >> (NMSEDEC_BITS-2)&2) + 1;

  465.         lut_nmsedec_ref[i]  = FFMAX((-2*i + (1<<NMSEDEC_FRACBITS) + a*i - (a*a<<NMSEDEC_FRACBITS-2))

  466.                                     << 13-NMSEDEC_FRACBITS, 0);

  467.         lut_nmsedec_ref0[i] = FFMAX(((i*i + (1-4*i << NMSEDEC_FRACBITS-1) + (1<<2*NMSEDEC_FRACBITS)) & mask)

  468.                                     << 1, 0);

  469.     }

  470. }

  471. 

  472. /* tier-1 routines */

  473. static int getnmsedec_sig(int x, int bpno)

  474. {

  475.     if (bpno > NMSEDEC_FRACBITS)

  476.         return lut_nmsedec_sig[(x >> (bpno - NMSEDEC_FRACBITS)) & ((1 << NMSEDEC_BITS) - 1)];

  477.     return lut_nmsedec_sig0[x & ((1 << NMSEDEC_BITS) - 1)];

  478. }

  479. 

  480. static int getnmsedec_ref(int x, int bpno)

  481. {

  482.     if (bpno > NMSEDEC_FRACBITS)

  483.         return lut_nmsedec_ref[(x >> (bpno - NMSEDEC_FRACBITS)) & ((1 << NMSEDEC_BITS) - 1)];

  484.     return lut_nmsedec_ref0[x & ((1 << NMSEDEC_BITS) - 1)];

  485. }

  486. 

  487. static void encode_sigpass(J2kT1Context *t1, int width, int height, int bandno, int *nmsedec, int bpno)

  488. {

  489.     int y0, x, y, mask = 1 << (bpno + NMSEDEC_FRACBITS);

  490.     for (y0 = 0; y0 < height; y0 += 4)

  491.         for (x = 0; x < width; x++)

  492.             for (y = y0; y < height && y < y0+4; y++){

  493.                 if (!(t1->flags[y+1][x+1] & J2K_T1_SIG) && (t1->flags[y+1][x+1] & J2K_T1_SIG_NB)){

  494.                     int ctxno = ff_j2k_getnbctxno(t1->flags[y+1][x+1], bandno),

  495.                         bit = t1->data[y][x] & mask ? 1 : 0;

  496.                     ff_mqc_encode(&t1->mqc, t1->mqc.cx_states + ctxno, bit);

  497.                     if (bit){

  498.                         int xorbit;

  499.                         int ctxno = ff_j2k_getsgnctxno(t1->flags[y+1][x+1], &xorbit);

  500.                         ff_mqc_encode(&t1->mqc, t1->mqc.cx_states + ctxno, (t1->flags[y+1][x+1] >> 15) ^ xorbit);

  501.                         *nmsedec += getnmsedec_sig(t1->data[y][x], bpno + NMSEDEC_FRACBITS);

  502.                         ff_j2k_set_significant(t1, x, y, t1->flags[y+1][x+1] >> 15);

  503.                     }

  504.                     t1->flags[y+1][x+1] |= J2K_T1_VIS;

  505.                 }

  506.             }

  507. }

  508. 

  509. static void encode_refpass(J2kT1Context *t1, int width, int height, int *nmsedec, int bpno)

  510. {

  511.     int y0, x, y, mask = 1 << (bpno + NMSEDEC_FRACBITS);

  512.     for (y0 = 0; y0 < height; y0 += 4)

  513.         for (x = 0; x < width; x++)

  514.             for (y = y0; y < height && y < y0+4; y++)

  515.                 if ((t1->flags[y+1][x+1] & (J2K_T1_SIG | J2K_T1_VIS)) == J2K_T1_SIG){

  516.                     int ctxno = ff_j2k_getrefctxno(t1->flags[y+1][x+1]);

  517.                     *nmsedec += getnmsedec_ref(t1->data[y][x], bpno + NMSEDEC_FRACBITS);

  518.                     ff_mqc_encode(&t1->mqc, t1->mqc.cx_states + ctxno, t1->data[y][x] & mask ? 1:0);

  519.                     t1->flags[y+1][x+1] |= J2K_T1_REF;

  520.                 }

  521. }

  522. 

  523. static void encode_clnpass(J2kT1Context *t1, int width, int height, int bandno, int *nmsedec, int bpno)

  524. {

  525.     int y0, x, y, mask = 1 << (bpno + NMSEDEC_FRACBITS);

  526.     for (y0 = 0; y0 < height; y0 += 4)

  527.         for (x = 0; x < width; x++){

  528.             if (y0 + 3 < height && !(

  529.             (t1->flags[y0+1][x+1] & (J2K_T1_SIG_NB | J2K_T1_VIS | J2K_T1_SIG)) ||

  530.             (t1->flags[y0+2][x+1] & (J2K_T1_SIG_NB | J2K_T1_VIS | J2K_T1_SIG)) ||

  531.             (t1->flags[y0+3][x+1] & (J2K_T1_SIG_NB | J2K_T1_VIS | J2K_T1_SIG)) ||

  532.             (t1->flags[y0+4][x+1] & (J2K_T1_SIG_NB | J2K_T1_VIS | J2K_T1_SIG))))

  533.             {

  534.                 // aggregation mode

  535.                 int rlen;

  536.                 for (rlen = 0; rlen < 4; rlen++)

  537.                     if (t1->data[y0+rlen][x] & mask)

  538.                         break;

  539.                 ff_mqc_encode(&t1->mqc, t1->mqc.cx_states + MQC_CX_RL, rlen != 4);

  540.                 if (rlen == 4)

  541.                     continue;

  542.                 ff_mqc_encode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI, rlen >> 1);

  543.                 ff_mqc_encode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI, rlen & 1);

  544.                 for (y = y0 + rlen; y < y0 + 4; y++){

  545.                     if (!(t1->flags[y+1][x+1] & (J2K_T1_SIG | J2K_T1_VIS))){

  546.                         int ctxno = ff_j2k_getnbctxno(t1->flags[y+1][x+1], bandno);

  547.                         if (y > y0 + rlen)

  548.                             ff_mqc_encode(&t1->mqc, t1->mqc.cx_states + ctxno, t1->data[y][x] & mask ? 1:0);

  549.                         if (t1->data[y][x] & mask){ // newly significant

  550.                             int xorbit;

  551.                             int ctxno = ff_j2k_getsgnctxno(t1->flags[y+1][x+1], &xorbit);

  552.                             *nmsedec += getnmsedec_sig(t1->data[y][x], bpno + NMSEDEC_FRACBITS);

  553.                             ff_mqc_encode(&t1->mqc, t1->mqc.cx_states + ctxno, (t1->flags[y+1][x+1] >> 15) ^ xorbit);

  554.                             ff_j2k_set_significant(t1, x, y, t1->flags[y+1][x+1] >> 15);

  555.                         }

  556.                     }

  557.                     t1->flags[y+1][x+1] &= ~J2K_T1_VIS;

  558.                 }

  559.             } else{

  560.                 for (y = y0; y < y0 + 4 && y < height; y++){

  561.                     if (!(t1->flags[y+1][x+1] & (J2K_T1_SIG | J2K_T1_VIS))){

  562.                         int ctxno = ff_j2k_getnbctxno(t1->flags[y+1][x+1], bandno);

  563.                         ff_mqc_encode(&t1->mqc, t1->mqc.cx_states + ctxno, t1->data[y][x] & mask ? 1:0);

  564.                         if (t1->data[y][x] & mask){ // newly significant

  565.                             int xorbit;

  566.                             int ctxno = ff_j2k_getsgnctxno(t1->flags[y+1][x+1], &xorbit);

  567.                             *nmsedec += getnmsedec_sig(t1->data[y][x], bpno + NMSEDEC_FRACBITS);

  568.                             ff_mqc_encode(&t1->mqc, t1->mqc.cx_states + ctxno, (t1->flags[y+1][x+1] >> 15) ^ xorbit);

  569.                             ff_j2k_set_significant(t1, x, y, t1->flags[y+1][x+1] >> 15);

  570.                         }

  571.                     }

  572.                     t1->flags[y+1][x+1] &= ~J2K_T1_VIS;

  573.                 }

  574.             }

  575.         }

  576. }

  577. 

  578. static void encode_cblk(J2kEncoderContext *s, J2kT1Context *t1, J2kCblk *cblk, J2kTile *tile,

  579.                         int width, int height, int bandpos, int lev)

  580. {

  581.     int pass_t = 2, passno, x, y, max=0, nmsedec, bpno;

  582.     int64_t wmsedec = 0;

  583. 

  584.     for (y = 0; y < height+2; y++)

  585.         memset(t1->flags[y], 0, (width+2)*sizeof(int));

  586. 

  587.     for (y = 0; y < height; y++){

  588.         for (x = 0; x < width; x++){

  589.             if (t1->data[y][x] < 0){

  590.                 t1->flags[y+1][x+1] |= J2K_T1_SGN;

  591.                 t1->data[y][x] = -t1->data[y][x];

  592.             }

  593.             max = FFMAX(max, t1->data[y][x]);

  594.         }

  595.     }

  596. 

  597.     if (max == 0){

  598.         cblk->nonzerobits = 0;

  599.         bpno = 0;

  600.     } else{

  601.         cblk->nonzerobits = av_log2(max) + 1 - NMSEDEC_FRACBITS;

  602.         bpno = cblk->nonzerobits - 1;

  603.     }

  604. 

  605.     ff_mqc_initenc(&t1->mqc, cblk->data);

  606. 

  607.     for (passno = 0; bpno >= 0; passno++){

  608.         nmsedec=0;

  609. 

  610.         switch(pass_t){

  611.             case 0: encode_sigpass(t1, width, height, bandpos, &nmsedec, bpno);

  612.                     break;

  613.             case 1: encode_refpass(t1, width, height, &nmsedec, bpno);

  614.                     break;

  615.             case 2: encode_clnpass(t1, width, height, bandpos, &nmsedec, bpno);

  616.                     break;

  617.         }

  618. 

  619.         cblk->passes[passno].rate = 3 + ff_mqc_length(&t1->mqc);

  620.         wmsedec += (int64_t)nmsedec << (2*bpno);

  621.         cblk->passes[passno].disto = wmsedec;

  622. 

  623.         if (++pass_t == 3){

  624.             pass_t = 0;

  625.             bpno--;

  626.         }

  627.     }

  628.     cblk->npasses = passno;

  629.     cblk->ninclpasses = passno;

  630. 

  631.     // TODO: optional flush on each pass

  632.     cblk->passes[passno-1].rate = ff_mqc_flush(&t1->mqc);

  633. }

  634. 

  635. /* tier-2 routines: */

  636. 

  637. static void putnumpasses(J2kEncoderContext *s, int n)

  638. {

  639.     if (n == 1)

  640.         put_num(s, 0, 1);

  641.     else if (n == 2)

  642.         put_num(s, 2, 2);

  643.     else if (n <= 5)

  644.         put_num(s, 0xc | (n-3), 4);

  645.     else if (n <= 36)

  646.         put_num(s, 0x1e0 | (n-6), 9);

  647.     else

  648.         put_num(s, 0xff80 | (n-37), 16);

  649. }

  650. 

  651. 

  652. static int encode_packet(J2kEncoderContext *s, J2kResLevel *rlevel, int precno,

  653.                           uint8_t *expn, int numgbits)

  654. {

  655.     int bandno, empty = 1;

  656. 

  657.     // init bitstream

  658.     *s->buf = 0;

  659.     s->bit_index = 0;

  660. 

  661.     // header

  662. 

  663.     // is the packet empty?

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

  665.         if (rlevel->band[bandno].coord[0][0] < rlevel->band[bandno].coord[0][1]

  666.         &&  rlevel->band[bandno].coord[1][0] < rlevel->band[bandno].coord[1][1]){

  667.             empty = 0;

  668.             break;

  669.         }

  670.     }

  671. 

  672.     put_bits(s, !empty, 1);

  673.     if (empty){

  674.         j2k_flush(s);

  675.         return 0;

  676.     }

  677. 

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

  679.         J2kBand *band = rlevel->band + bandno;

  680.         J2kPrec *prec = band->prec + precno;

  681.         int yi, xi, pos;

  682.         int cblknw = prec->xi1 - prec->xi0;

  683. 

  684.         if (band->coord[0][0] == band->coord[0][1]

  685.         ||  band->coord[1][0] == band->coord[1][1])

  686.             continue;

  687. 

  688.         for (pos=0, yi = prec->yi0; yi < prec->yi1; yi++){

  689.             for (xi = prec->xi0; xi < prec->xi1; xi++, pos++){

  690.                 prec->cblkincl[pos].val = band->cblk[yi * cblknw + xi].ninclpasses == 0;

  691.                 tag_tree_update(prec->cblkincl + pos);

  692.                 prec->zerobits[pos].val = expn[bandno] + numgbits - 1 - band->cblk[yi * cblknw + xi].nonzerobits;

  693.                 tag_tree_update(prec->zerobits + pos);

  694.             }

  695.         }

  696. 

  697.         for (pos=0, yi = prec->yi0; yi < prec->yi1; yi++){

  698.             for (xi = prec->xi0; xi < prec->xi1; xi++, pos++){

  699.                 int pad = 0, llen, length;

  700.                 J2kCblk *cblk = band->cblk + yi * cblknw + xi;

  701. 

  702.                 if (s->buf_end - s->buf < 20) // approximately

  703.                     return -1;

  704. 

  705.                 // inclusion information

  706.                 tag_tree_code(s, prec->cblkincl + pos, 1);

  707.                 if (!cblk->ninclpasses)

  708.                     continue;

  709.                 // zerobits information

  710.                 tag_tree_code(s, prec->zerobits + pos, 100);

  711.                 // number of passes

  712.                 putnumpasses(s, cblk->ninclpasses);

  713. 

  714.                 length = cblk->passes[cblk->ninclpasses-1].rate;

  715.                 llen = av_log2(length) - av_log2(cblk->ninclpasses) - 2;

  716.                 if (llen < 0){

  717.                     pad = -llen;

  718.                     llen = 0;

  719.                 }

  720.                 // length of code block

  721.                 put_bits(s, 1, llen);

  722.                 put_bits(s, 0, 1);

  723.                 put_num(s, length, av_log2(length)+1+pad);

  724.             }

  725.         }

  726.     }

  727.     j2k_flush(s);

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

  729.         J2kBand *band = rlevel->band + bandno;

  730.         J2kPrec *prec = band->prec + precno;

  731.         int yi, cblknw = prec->xi1 - prec->xi0;

  732.         for (yi = prec->yi0; yi < prec->yi1; yi++){

  733.             int xi;

  734.             for (xi = prec->xi0; xi < prec->xi1; xi++){

  735.                 J2kCblk *cblk = band->cblk + yi * cblknw + xi;

  736.                 if (cblk->ninclpasses){

  737.                     if (s->buf_end - s->buf < cblk->passes[cblk->ninclpasses-1].rate)

  738.                         return -1;

  739.                     bytestream_put_buffer(&s->buf, cblk->data, cblk->passes[cblk->ninclpasses-1].rate);

  740.                 }

  741.             }

  742.         }

  743.     }

  744.     return 0;

  745. }

  746. 

  747. static int encode_packets(J2kEncoderContext *s, J2kTile *tile, int tileno)

  748. {

  749.     int compno, reslevelno, ret;

  750.     J2kCodingStyle *codsty = &s->codsty;

  751.     J2kQuantStyle  *qntsty = &s->qntsty;

  752. 

  753.     av_log(s->avctx, AV_LOG_DEBUG, "tier2\n");

  754.     // lay-rlevel-comp-pos progression

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

  756.         for (compno = 0; compno < s->ncomponents; compno++){

  757.             int precno;

  758.             J2kResLevel *reslevel = s->tile[tileno].comp[compno].reslevel + reslevelno;

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

  760.                 if (ret = encode_packet(s, reslevel, precno, qntsty->expn + (reslevelno ? 3*reslevelno-2 : 0),

  761.                               qntsty->nguardbits))

  762.                     return ret;

  763.             }

  764.         }

  765.     }

  766.     av_log(s->avctx, AV_LOG_DEBUG, "after tier2\n");

  767.     return 0;

  768. }

  769. 

  770. static int getcut(J2kCblk *cblk, int64_t lambda, int dwt_norm)

  771. {

  772.     int passno, res = 0;

  773.     for (passno = 0; passno < cblk->npasses; passno++){

  774.         int dr;

  775.         int64_t dd;

  776. 

  777.         dr = cblk->passes[passno].rate

  778.            - (res ? cblk->passes[res-1].rate:0);

  779.         dd = cblk->passes[passno].disto

  780.            - (res ? cblk->passes[res-1].disto:0);

  781. 

  782.         if (((dd * dwt_norm) >> WMSEDEC_SHIFT) * dwt_norm >= dr * lambda)

  783.             res = passno+1;

  784.     }

  785.     return res;

  786. }

  787. 

  788. static void truncpasses(J2kEncoderContext *s, J2kTile *tile)

  789. {

  790.     int compno, reslevelno, bandno, cblkno, lev;

  791.     J2kCodingStyle *codsty = &s->codsty;

  792. 

  793.     for (compno = 0; compno < s->ncomponents; compno++){

  794.         J2kComponent *comp = tile->comp + compno;

  795. 

  796.         for (reslevelno = 0, lev = codsty->nreslevels-1; reslevelno < codsty->nreslevels; reslevelno++, lev--){

  797.             J2kResLevel *reslevel = comp->reslevel + reslevelno;

  798. 

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

  800.                 int bandpos = bandno + (reslevelno > 0);

  801.                 J2kBand *band = reslevel->band + bandno;

  802. 

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

  804.                     J2kCblk *cblk = band->cblk + cblkno;

  805. 

  806.                     cblk->ninclpasses = getcut(cblk, s->lambda,

  807.                             (int64_t)dwt_norms[codsty->transform][bandpos][lev] * (int64_t)band->stepsize >> 13);

  808.                 }

  809.             }

  810.         }

  811.     }

  812. }

  813. 

  814. static int encode_tile(J2kEncoderContext *s, J2kTile *tile, int tileno)

  815. {

  816.     int compno, reslevelno, bandno, ret;

  817.     J2kT1Context t1;

  818.     J2kCodingStyle *codsty = &s->codsty;

  819.     for (compno = 0; compno < s->ncomponents; compno++){

  820.         J2kComponent *comp = s->tile[tileno].comp + compno;

  821. 

  822.         av_log(s->avctx, AV_LOG_DEBUG,"dwt\n");

  823.         if (ret = ff_dwt_encode(&comp->dwt, comp->data))

  824.             return ret;

  825.         av_log(s->avctx, AV_LOG_DEBUG,"after dwt -> tier1\n");

  826. 

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

  828.             J2kResLevel *reslevel = comp->reslevel + reslevelno;

  829. 

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

  831.                 J2kBand *band = reslevel->band + bandno;

  832.                 int cblkx, cblky, cblkno=0, xx0, x0, xx1, y0, yy0, yy1, bandpos;

  833.                 yy0 = bandno == 0 ? 0 : comp->reslevel[reslevelno-1].coord[1][1] - comp->reslevel[reslevelno-1].coord[1][0];

  834.                 y0 = yy0;

  835.                 yy1 = FFMIN(ff_j2k_ceildiv(band->coord[1][0] + 1, band->codeblock_height) * band->codeblock_height,

  836.                             band->coord[1][1]) - band->coord[1][0] + yy0;

  837. 

  838.                 if (band->coord[0][0] == band->coord[0][1] || band->coord[1][0] == band->coord[1][1])

  839.                     continue;

  840. 

  841.                 bandpos = bandno + (reslevelno > 0);

  842. 

  843.                 for (cblky = 0; cblky < band->cblkny; cblky++){

  844.                     if (reslevelno == 0 || bandno == 1)

  845.                         xx0 = 0;

  846.                     else

  847.                         xx0 = comp->reslevel[reslevelno-1].coord[0][1] - comp->reslevel[reslevelno-1].coord[0][0];

  848.                     x0 = xx0;

  849.                     xx1 = FFMIN(ff_j2k_ceildiv(band->coord[0][0] + 1, band->codeblock_width) * band->codeblock_width,

  850.                                 band->coord[0][1]) - band->coord[0][0] + xx0;

  851. 

  852.                     for (cblkx = 0; cblkx < band->cblknx; cblkx++, cblkno++){

  853.                         int y, x;

  854.                         if (codsty->transform == FF_DWT53){

  855.                             for (y = yy0; y < yy1; y++){

  856.                                 int *ptr = t1.data[y-yy0];

  857.                                 for (x = xx0; x < xx1; x++){

  858.                                     *ptr++ = comp->data[(comp->coord[0][1] - comp->coord[0][0]) * y + x] << NMSEDEC_FRACBITS;

  859.                                 }

  860.                             }

  861.                         } else{

  862.                             for (y = yy0; y < yy1; y++){

  863.                                 int *ptr = t1.data[y-yy0];

  864.                                 for (x = xx0; x < xx1; x++){

  865.                                     *ptr = (comp->data[(comp->coord[0][1] - comp->coord[0][0]) * y + x]);

  866.                                     *ptr++ = (int64_t)*ptr * (int64_t)(8192 * 8192 / band->stepsize) >> 13 - NMSEDEC_FRACBITS;

  867.                                 }

  868.                             }

  869.                         }

  870.                         encode_cblk(s, &t1, band->cblk + cblkno, tile, xx1 - xx0, yy1 - yy0,

  871.                                     bandpos, codsty->nreslevels - reslevelno - 1);

  872.                         xx0 = xx1;

  873.                         xx1 = FFMIN(xx1 + band->codeblock_width, band->coord[0][1] - band->coord[0][0] + x0);

  874.                     }

  875.                     yy0 = yy1;

  876.                     yy1 = FFMIN(yy1 + band->codeblock_height, band->coord[1][1] - band->coord[1][0] + y0);

  877.                 }

  878.             }

  879.         }

  880.         av_log(s->avctx, AV_LOG_DEBUG, "after tier1\n");

  881.     }

  882. 

  883.     av_log(s->avctx, AV_LOG_DEBUG, "rate control\n");

  884.     truncpasses(s, tile);

  885.     if (ret = encode_packets(s, tile, tileno))

  886.         return ret;

  887.     av_log(s->avctx, AV_LOG_DEBUG, "after rate control\n");

  888.     return 0;

  889. }

  890. 

  891. void cleanup(J2kEncoderContext *s)

  892. {

  893.     int tileno, compno;

  894.     J2kCodingStyle *codsty = &s->codsty;

  895. 

  896.     for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++){

  897.         for (compno = 0; compno < s->ncomponents; compno++){

  898.             J2kComponent *comp = s->tile[tileno].comp + compno;

  899.             ff_j2k_cleanup(comp, codsty);

  900.         }

  901.         av_freep(&s->tile[tileno].comp);

  902.     }

  903.     av_freep(&s->tile);

  904. }

  905. 

  906. static void reinit(J2kEncoderContext *s)

  907. {

  908.     int tileno, compno;

  909.     for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++){

  910.         J2kTile *tile = s->tile + tileno;

  911.         for (compno = 0; compno < s->ncomponents; compno++)

  912.             ff_j2k_reinit(tile->comp + compno, &s->codsty);

  913.     }

  914. }

  915. 

  916. static int encode_frame(AVCodecContext *avctx,

  917.                         uint8_t *buf, int buf_size,

  918.                         void *data)

  919. {

  920.     int tileno, ret;

  921.     J2kEncoderContext *s = avctx->priv_data;

  922. 

  923.     // init:

  924.     s->buf = s->buf_start = buf;

  925.     s->buf_end = buf + buf_size;

  926. 

  927.     s->picture = data;

  928. 

  929.     s->lambda = s->picture->quality * LAMBDA_SCALE;

  930. 

  931.     copy_frame(s);

  932.     reinit(s);

  933. 

  934.     if (s->buf_end - s->buf < 2)

  935.         return -1;

  936.     bytestream_put_be16(&s->buf, J2K_SOC);

  937.     if (ret = put_siz(s))

  938.         return ret;

  939.     if (ret = put_cod(s))

  940.         return ret;

  941.     if (ret = put_qcd(s, 0))

  942.         return ret;

  943. 

  944.     for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++){

  945.         uint8_t *psotptr;

  946.         if ((psotptr = put_sot(s, tileno)) < 0)

  947.             return psotptr;

  948.         if (s->buf_end - s->buf < 2)

  949.             return -1;

  950.         bytestream_put_be16(&s->buf, J2K_SOD);

  951.         if (ret = encode_tile(s, s->tile + tileno, tileno))

  952.             return ret;

  953.         bytestream_put_be32(&psotptr, s->buf - psotptr + 6);

  954.     }

  955.     if (s->buf_end - s->buf < 2)

  956.         return -1;

  957.     bytestream_put_be16(&s->buf, J2K_EOC);

  958. 

  959.     av_log(s->avctx, AV_LOG_DEBUG, "end\n");

  960.     return s->buf - s->buf_start;

  961. }

  962. 

  963. static av_cold int j2kenc_init(AVCodecContext *avctx)

  964. {

  965.     int i, ret;

  966.     J2kEncoderContext *s = avctx->priv_data;

  967.     J2kCodingStyle *codsty = &s->codsty;

  968.     J2kQuantStyle  *qntsty = &s->qntsty;

  969. 

  970.     s->avctx = avctx;

  971.     av_log(s->avctx, AV_LOG_DEBUG, "init\n");

  972. 

  973.     // defaults:

  974.     // TODO: implement setting non-standard precinct size

  975.     codsty->log2_prec_width  = 15;

  976.     codsty->log2_prec_height = 15;

  977.     codsty->nreslevels       = 7;

  978.     codsty->log2_cblk_width  = 4;

  979.     codsty->log2_cblk_height = 4;

  980.     codsty->transform        = 1;

  981. 

  982.     qntsty->nguardbits       = 1;

  983. 

  984.     s->tile_width            = 256;

  985.     s->tile_height           = 256;

  986. 

  987.     if (codsty->transform == FF_DWT53)

  988.         qntsty->quantsty = J2K_QSTY_NONE;

  989.     else

  990.         qntsty->quantsty = J2K_QSTY_SE;

  991. 

  992.     s->width = avctx->width;

  993.     s->height = avctx->height;

  994. 

  995.     for (i = 0; i < 3; i++)

  996.         s->cbps[i] = 8;

  997. 

  998.     if (avctx->pix_fmt == PIX_FMT_RGB24){

  999.         s->ncomponents = 3;

  1000.     } else if (avctx->pix_fmt == PIX_FMT_GRAY8){

  1001.         s->ncomponents = 1;

  1002.     } else{ // planar YUV

  1003.         s->planar = 1;

  1004.         s->ncomponents = 3;

  1005.         avcodec_get_chroma_sub_sample(avctx->pix_fmt,

  1006.                 s->chroma_shift, s->chroma_shift + 1);

  1007.     }

  1008. 

  1009.     ff_j2k_init_tier1_luts();

  1010. 

  1011.     init_luts();

  1012. 

  1013.     init_quantization(s);

  1014.     if (ret=init_tiles(s))

  1015.         return ret;

  1016. 

  1017.     av_log(s->avctx, AV_LOG_DEBUG, "after init\n");

  1018. 

  1019.     return 0;

  1020. }

  1021. 

  1022. static int j2kenc_destroy(AVCodecContext *avctx)

  1023. {

  1024.     J2kEncoderContext *s = avctx->priv_data;

  1025. 

  1026.     cleanup(s);

  1027.     return 0;

  1028. }

  1029. 

  1030. AVCodec jpeg2000_encoder = {

  1031.     "j2k",

  1032.     CODEC_TYPE_VIDEO,

  1033.     CODEC_ID_JPEG2000,

  1034.     sizeof(J2kEncoderContext),

  1035.     j2kenc_init,

  1036.     encode_frame,

  1037.     j2kenc_destroy,

  1038.     NULL,

  1039.     0,

  1040.     .pix_fmts =

  1041.         (enum PixelFormat[]) {PIX_FMT_GRAY8, PIX_FMT_RGB24,

  1042.                               PIX_FMT_YUV422P, PIX_FMT_YUV444P,

  1043.                               PIX_FMT_YUV410P, PIX_FMT_YUV411P,

  1044.                               -1}

  1045. };