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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 "internal.h"

  31. #include "bytestream.h"

  32. #include "jpeg2000.h"

  33. #include "libavutil/common.h"

  34. #include "libavutil/opt.h"

  35. 

  36. #define NMSEDEC_BITS 7

  37. #define NMSEDEC_FRACBITS (NMSEDEC_BITS-1)

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

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

  40. 

  41. #define CODEC_JP2 1

  42. #define CODEC_J2K 0

  43. 

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

  45.            lut_nmsedec_ref0[1<<NMSEDEC_BITS],

  46.            lut_nmsedec_sig [1<<NMSEDEC_BITS],

  47.            lut_nmsedec_sig0[1<<NMSEDEC_BITS];

  48. 

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

  50.     {{10000, 19650, 41770,  84030, 169000, 338400,  676900, 1353000, 2706000, 5409000},

  51.      {20220, 39890, 83550, 170400, 342700, 686300, 1373000, 2746000, 5490000},

  52.      {20220, 39890, 83550, 170400, 342700, 686300, 1373000, 2746000, 5490000},

  53.      {20800, 38650, 83070, 171800, 347100, 695900, 1393000, 2786000, 5572000}},

  54. 

  55.     {{10000, 15000, 27500, 53750, 106800, 213400, 426700, 853300, 1707000, 3413000},

  56.      {10380, 15920, 29190, 57030, 113300, 226400, 452500, 904800, 1809000},

  57.      {10380, 15920, 29190, 57030, 113300, 226400, 452500, 904800, 1809000},

  58.      { 7186,  9218, 15860, 30430,  60190, 120100, 240000, 479700,  959300}}

  59. };

  60. 

  61. typedef struct {

  62.    Jpeg2000Component *comp;

  63. } Jpeg2000Tile;

  64. 

  65. typedef struct {

  66.     AVClass *class;

  67.     AVCodecContext *avctx;

  68.     const AVFrame *picture;

  69. 

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

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

  72.     int chroma_shift[2];

  73.     uint8_t planar;

  74.     int ncomponents;

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

  76.     int numXtiles, numYtiles;

  77. 

  78.     uint8_t *buf_start;

  79.     uint8_t *buf;

  80.     uint8_t *buf_end;

  81.     int bit_index;

  82. 

  83.     int64_t lambda;

  84. 

  85.     Jpeg2000CodingStyle codsty;

  86.     Jpeg2000QuantStyle  qntsty;

  87. 

  88.     Jpeg2000Tile *tile;

  89. 

  90.     int format;

  91. } Jpeg2000EncoderContext;

  92. 

  93. 

  94. /* debug */

  95. #if 0

  96. #undef ifprintf

  97. #undef printf

  98. 

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

  100. {

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

  102. }

  103. 

  104. static void printcomp(Jpeg2000Component *comp)

  105. {

  106.     int i;

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

  108.         ff_jpeg2000_printv(comp->i_data + i * (comp->x1 - comp->x0), comp->x1 - comp->x0);

  109. }

  110. 

  111. static void dump(Jpeg2000EncoderContext *s, FILE *fd)

  112. {

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

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

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

  116.                 "tiles:\n",

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

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

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

  120.         Jpeg2000Tile *tile = s->tile + tileno;

  121.         nspaces(fd, 2);

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

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

  124.             Jpeg2000Component *comp = tile->comp + compno;

  125.             nspaces(fd, 4);

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

  127.             nspaces(fd, 4);

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

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

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

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

  132.                 nspaces(fd, 6);

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

  134.                 nspaces(fd, 6);

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

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

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

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

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

  140.                     nspaces(fd, 8);

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

  142.                     nspaces(fd, 8);

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

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

  145.                                 band->x0, band->x1,

  146.                                 band->y0, band->y1,

  147.                                 band->codeblock_width, band->codeblock_height,

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

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

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

  151.                         nspaces(fd, 10);

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

  153.                         nspaces(fd, 10);

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

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

  156.                     }

  157.                 }

  158.             }

  159.         }

  160.     }

  161. }

  162. #endif

  163. 

  164. /* bitstream routines */

  165. 

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

  167. static void put_bits(Jpeg2000EncoderContext *s, int val, int n) // TODO: optimize

  168. {

  169.     while (n-- > 0){

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

  171.         {

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

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

  174.         }

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

  176.     }

  177. }

  178. 

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

  180. static void put_num(Jpeg2000EncoderContext *s, int num, int n)

  181. {

  182.     while(--n >= 0)

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

  184. }

  185. 

  186. /** flush the bitstream */

  187. static void j2k_flush(Jpeg2000EncoderContext *s)

  188. {

  189.     if (s->bit_index){

  190.         s->bit_index = 0;

  191.         s->buf++;

  192.     }

  193. }

  194. 

  195. /* tag tree routines */

  196. 

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

  198. static void tag_tree_code(Jpeg2000EncoderContext *s, Jpeg2000TgtNode *node, int threshold)

  199. {

  200.     Jpeg2000TgtNode *stack[30];

  201.     int sp = 1, curval = 0;

  202.     stack[0] = node;

  203. 

  204.     node = node->parent;

  205.     while(node){

  206.         if (node->vis){

  207.             curval = node->val;

  208.             break;

  209.         }

  210.         node->vis++;

  211.         stack[sp++] = node;

  212.         node = node->parent;

  213.     }

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

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

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

  217.             break;

  218.         }

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

  220.         put_bits(s, 1, 1);

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

  222.     }

  223. }

  224. 

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

  226. static void tag_tree_update(Jpeg2000TgtNode *node)

  227. {

  228.     int lev = 0;

  229.     while (node->parent){

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

  231.             break;

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

  233.         node = node->parent;

  234.         lev++;

  235.     }

  236. }

  237. 

  238. static int put_siz(Jpeg2000EncoderContext *s)

  239. {

  240.     int i;

  241. 

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

  243.         return -1;

  244. 

  245.     bytestream_put_be16(&s->buf, JPEG2000_SIZ);

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

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

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

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

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

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

  252. 

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

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

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

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

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

  258. 

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

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

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

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

  263.     }

  264.     return 0;

  265. }

  266. 

  267. static int put_cod(Jpeg2000EncoderContext *s)

  268. {

  269.     Jpeg2000CodingStyle *codsty = &s->codsty;

  270. 

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

  272.         return -1;

  273. 

  274.     bytestream_put_be16(&s->buf, JPEG2000_COD);

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

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

  277.     // SGcod

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

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

  280.     if(s->avctx->pix_fmt == AV_PIX_FMT_YUV444P){

  281.         bytestream_put_byte(&s->buf, 0); // unspecified

  282.     }else{

  283.         bytestream_put_byte(&s->buf, 0); // unspecified

  284.     }

  285.     // SPcod

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

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

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

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

  290.     bytestream_put_byte(&s->buf, codsty->transform == FF_DWT53); // transformation

  291.     return 0;

  292. }

  293. 

  294. static int put_qcd(Jpeg2000EncoderContext *s, int compno)

  295. {

  296.     int i, size;

  297.     Jpeg2000CodingStyle *codsty = &s->codsty;

  298.     Jpeg2000QuantStyle  *qntsty = &s->qntsty;

  299. 

  300.     if (qntsty->quantsty == JPEG2000_QSTY_NONE)

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

  302.     else // QSTY_SE

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

  304. 

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

  306.         return -1;

  307. 

  308.     bytestream_put_be16(&s->buf, JPEG2000_QCD);

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

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

  311.     if (qntsty->quantsty == JPEG2000_QSTY_NONE)

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

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

  314.     else // QSTY_SE

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

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

  317.     return 0;

  318. }

  319. 

  320. static int put_com(Jpeg2000EncoderContext *s, int compno)

  321. {

  322.     int size = 4 + strlen(LIBAVCODEC_IDENT);

  323. 

  324.     if (s->avctx->flags & CODEC_FLAG_BITEXACT)

  325.         return 0;

  326. 

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

  328.         return -1;

  329. 

  330.     bytestream_put_be16(&s->buf, JPEG2000_COM);

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

  332.     bytestream_put_be16(&s->buf, 1); // General use (ISO/IEC 8859-15 (Latin) values)

  333. 

  334.     bytestream_put_buffer(&s->buf, LIBAVCODEC_IDENT, strlen(LIBAVCODEC_IDENT));

  335. 

  336.     return 0;

  337. }

  338. 

  339. static uint8_t *put_sot(Jpeg2000EncoderContext *s, int tileno)

  340. {

  341.     uint8_t *psotptr;

  342. 

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

  344.         return NULL;

  345. 

  346.     bytestream_put_be16(&s->buf, JPEG2000_SOT);

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

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

  349. 

  350.     psotptr = s->buf;

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

  352. 

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

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

  355.     return psotptr;

  356. }

  357. 

  358. /**

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

  360.  * allocate memory for them

  361.  * divide the input image into tile-components

  362.  */

  363. static int init_tiles(Jpeg2000EncoderContext *s)

  364. {

  365.     int tileno, tilex, tiley, compno;

  366.     Jpeg2000CodingStyle *codsty = &s->codsty;

  367.     Jpeg2000QuantStyle  *qntsty = &s->qntsty;

  368. 

  369.     s->numXtiles = ff_jpeg2000_ceildiv(s->width, s->tile_width);

  370.     s->numYtiles = ff_jpeg2000_ceildiv(s->height, s->tile_height);

  371. 

  372.     s->tile = av_malloc_array(s->numXtiles, s->numYtiles * sizeof(Jpeg2000Tile));

  373.     if (!s->tile)

  374.         return AVERROR(ENOMEM);

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

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

  377.             Jpeg2000Tile *tile = s->tile + tileno;

  378. 

  379.             tile->comp = av_mallocz_array(s->ncomponents, sizeof(Jpeg2000Component));

  380.             if (!tile->comp)

  381.                 return AVERROR(ENOMEM);

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

  383.                 Jpeg2000Component *comp = tile->comp + compno;

  384.                 int ret, i, j;

  385. 

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

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

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

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

  390.                 if (compno > 0)

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

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

  393.                             comp->coord[i][j] = comp->coord_o[i][j] = ff_jpeg2000_ceildivpow2(comp->coord[i][j], s->chroma_shift[i]);

  394. 

  395.                 if ((ret = ff_jpeg2000_init_component(comp,

  396.                                                 codsty,

  397.                                                 qntsty,

  398.                                                 s->cbps[compno],

  399.                                                 compno?1<<s->chroma_shift[0]:1,

  400.                                                 compno?1<<s->chroma_shift[1]:1,

  401.                                                 s->avctx

  402.                                                )) < 0)

  403.                     return ret;

  404.             }

  405.         }

  406.     return 0;

  407. }

  408. 

  409. static void copy_frame(Jpeg2000EncoderContext *s)

  410. {

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

  412.     uint8_t *line;

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

  414.         Jpeg2000Tile *tile = s->tile + tileno;

  415.         if (s->planar){

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

  417.                 Jpeg2000Component *comp = tile->comp + compno;

  418.                 int *dst = comp->i_data;

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

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

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

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

  423.                     uint8_t *ptr = line;

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

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

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

  427.                 }

  428.             }

  429.         } else{

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

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

  432. 

  433.             i = 0;

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

  435.                 uint8_t *ptr = line;

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

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

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

  439.                     }

  440.                 }

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

  442.             }

  443.         }

  444.     }

  445. }

  446. 

  447. static void init_quantization(Jpeg2000EncoderContext *s)

  448. {

  449.     int compno, reslevelno, bandno;

  450.     Jpeg2000QuantStyle  *qntsty = &s->qntsty;

  451.     Jpeg2000CodingStyle *codsty = &s->codsty;

  452. 

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

  454.         int gbandno = 0;

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

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

  457.             nbands = reslevelno ? 3 : 1;

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

  459.                 int expn, mant = 0;

  460. 

  461.                 if (codsty->transform == FF_DWT97_INT){

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

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

  464.                         log = av_log2(ss);

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

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

  467.                 } else

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

  469. 

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

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

  472.             }

  473.         }

  474.     }

  475. }

  476. 

  477. static void init_luts(void)

  478. {

  479.     int i, a,

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

  481. 

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

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

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

  485. 

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

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

  488.                                     << 13-NMSEDEC_FRACBITS, 0);

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

  490.                                     << 1, 0);

  491.     }

  492. }

  493. 

  494. /* tier-1 routines */

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

  496. {

  497.     if (bpno > NMSEDEC_FRACBITS)

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

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

  500. }

  501. 

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

  503. {

  504.     if (bpno > NMSEDEC_FRACBITS)

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

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

  507. }

  508. 

  509. static void encode_sigpass(Jpeg2000T1Context *t1, int width, int height, int bandno, 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) * t1->stride + x+1] & JPEG2000_T1_SIG) && (t1->flags[(y+1) * t1->stride + x+1] & JPEG2000_T1_SIG_NB)){

  516.                     int ctxno = ff_jpeg2000_getsigctxno(t1->flags[(y+1) * t1->stride + x+1], bandno),

  517.                         bit = t1->data[(y) * t1->stride + x] & mask ? 1 : 0;

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

  519.                     if (bit){

  520.                         int xorbit;

  521.                         int ctxno = ff_jpeg2000_getsgnctxno(t1->flags[(y+1) * t1->stride + x+1], &xorbit);

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

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

  524.                         ff_jpeg2000_set_significance(t1, x, y, t1->flags[(y+1) * t1->stride + x+1] >> 15);

  525.                     }

  526.                     t1->flags[(y+1) * t1->stride + x+1] |= JPEG2000_T1_VIS;

  527.                 }

  528.             }

  529. }

  530. 

  531. static void encode_refpass(Jpeg2000T1Context *t1, int width, int height, int *nmsedec, int bpno)

  532. {

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

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

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

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

  537.                 if ((t1->flags[(y+1) * t1->stride + x+1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS)) == JPEG2000_T1_SIG){

  538.                     int ctxno = ff_jpeg2000_getrefctxno(t1->flags[(y+1) * t1->stride + x+1]);

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

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

  541.                     t1->flags[(y+1) * t1->stride + x+1] |= JPEG2000_T1_REF;

  542.                 }

  543. }

  544. 

  545. static void encode_clnpass(Jpeg2000T1Context *t1, int width, int height, int bandno, int *nmsedec, int bpno)

  546. {

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

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

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

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

  551.             (t1->flags[(y0+1) * t1->stride + x+1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||

  552.             (t1->flags[(y0+2) * t1->stride + x+1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||

  553.             (t1->flags[(y0+3) * t1->stride + x+1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||

  554.             (t1->flags[(y0+4) * t1->stride + x+1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG))))

  555.             {

  556.                 // aggregation mode

  557.                 int rlen;

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

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

  560.                         break;

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

  562.                 if (rlen == 4)

  563.                     continue;

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

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

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

  567.                     if (!(t1->flags[(y+1) * t1->stride + x+1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS))){

  568.                         int ctxno = ff_jpeg2000_getsigctxno(t1->flags[(y+1) * t1->stride + x+1], bandno);

  569.                         if (y > y0 + rlen)

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

  571.                         if (t1->data[(y) * t1->stride + x] & mask){ // newly significant

  572.                             int xorbit;

  573.                             int ctxno = ff_jpeg2000_getsgnctxno(t1->flags[(y+1) * t1->stride + x+1], &xorbit);

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

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

  576.                             ff_jpeg2000_set_significance(t1, x, y, t1->flags[(y+1) * t1->stride + x+1] >> 15);

  577.                         }

  578.                     }

  579.                     t1->flags[(y+1) * t1->stride + x+1] &= ~JPEG2000_T1_VIS;

  580.                 }

  581.             } else{

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

  583.                     if (!(t1->flags[(y+1) * t1->stride + x+1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS))){

  584.                         int ctxno = ff_jpeg2000_getsigctxno(t1->flags[(y+1) * t1->stride + x+1], bandno);

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

  586.                         if (t1->data[(y) * t1->stride + x] & mask){ // newly significant

  587.                             int xorbit;

  588.                             int ctxno = ff_jpeg2000_getsgnctxno(t1->flags[(y+1) * t1->stride + x+1], &xorbit);

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

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

  591.                             ff_jpeg2000_set_significance(t1, x, y, t1->flags[(y+1) * t1->stride + x+1] >> 15);

  592.                         }

  593.                     }

  594.                     t1->flags[(y+1) * t1->stride + x+1] &= ~JPEG2000_T1_VIS;

  595.                 }

  596.             }

  597.         }

  598. }

  599. 

  600. static void encode_cblk(Jpeg2000EncoderContext *s, Jpeg2000T1Context *t1, Jpeg2000Cblk *cblk, Jpeg2000Tile *tile,

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

  602. {

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

  604.     int64_t wmsedec = 0;

  605. 

  606.     memset(t1->flags, 0, t1->stride * (height + 2) * sizeof(*t1->flags));

  607. 

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

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

  610.             if (t1->data[(y) * t1->stride + x] < 0){

  611.                 t1->flags[(y+1) * t1->stride + x+1] |= JPEG2000_T1_SGN;

  612.                 t1->data[(y) * t1->stride + x] = -t1->data[(y) * t1->stride + x];

  613.             }

  614.             max = FFMAX(max, t1->data[(y) * t1->stride + x]);

  615.         }

  616.     }

  617. 

  618.     if (max == 0){

  619.         cblk->nonzerobits = 0;

  620.         bpno = 0;

  621.     } else{

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

  623.         bpno = cblk->nonzerobits - 1;

  624.     }

  625. 

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

  627. 

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

  629.         nmsedec=0;

  630. 

  631.         switch(pass_t){

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

  633.                     break;

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

  635.                     break;

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

  637.                     break;

  638.         }

  639. 

  640.         cblk->passes[passno].rate = ff_mqc_flush_to(&t1->mqc, cblk->passes[passno].flushed, &cblk->passes[passno].flushed_len);

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

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

  643. 

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

  645.             pass_t = 0;

  646.             bpno--;

  647.         }

  648.     }

  649.     cblk->npasses = passno;

  650.     cblk->ninclpasses = passno;

  651. 

  652.     cblk->passes[passno-1].rate = ff_mqc_flush_to(&t1->mqc, cblk->passes[passno-1].flushed, &cblk->passes[passno-1].flushed_len);

  653. }

  654. 

  655. /* tier-2 routines: */

  656. 

  657. static void putnumpasses(Jpeg2000EncoderContext *s, int n)

  658. {

  659.     if (n == 1)

  660.         put_num(s, 0, 1);

  661.     else if (n == 2)

  662.         put_num(s, 2, 2);

  663.     else if (n <= 5)

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

  665.     else if (n <= 36)

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

  667.     else

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

  669. }

  670. 

  671. 

  672. static int encode_packet(Jpeg2000EncoderContext *s, Jpeg2000ResLevel *rlevel, int precno,

  673.                           uint8_t *expn, int numgbits)

  674. {

  675.     int bandno, empty = 1;

  676. 

  677.     // init bitstream

  678.     *s->buf = 0;

  679.     s->bit_index = 0;

  680. 

  681.     // header

  682. 

  683.     // is the packet empty?

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

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

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

  687.             empty = 0;

  688.             break;

  689.         }

  690.     }

  691. 

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

  693.     if (empty){

  694.         j2k_flush(s);

  695.         return 0;

  696.     }

  697. 

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

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

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

  701.         int yi, xi, pos;

  702.         int cblknw = prec->nb_codeblocks_width;

  703. 

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

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

  706.             continue;

  707. 

  708.         for (pos=0, yi = 0; yi < prec->nb_codeblocks_height; yi++){

  709.             for (xi = 0; xi < cblknw; xi++, pos++){

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

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

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

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

  714.             }

  715.         }

  716. 

  717.         for (pos=0, yi = 0; yi < prec->nb_codeblocks_height; yi++){

  718.             for (xi = 0; xi < cblknw; xi++, pos++){

  719.                 int pad = 0, llen, length;

  720.                 Jpeg2000Cblk *cblk = prec->cblk + yi * cblknw + xi;

  721. 

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

  723.                     return -1;

  724. 

  725.                 // inclusion information

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

  727.                 if (!cblk->ninclpasses)

  728.                     continue;

  729.                 // zerobits information

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

  731.                 // number of passes

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

  733. 

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

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

  736.                 if (llen < 0){

  737.                     pad = -llen;

  738.                     llen = 0;

  739.                 }

  740.                 // length of code block

  741.                 put_bits(s, 1, llen);

  742.                 put_bits(s, 0, 1);

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

  744.             }

  745.         }

  746.     }

  747.     j2k_flush(s);

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

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

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

  751.         int yi, cblknw = prec->nb_codeblocks_width;

  752.         for (yi =0; yi < prec->nb_codeblocks_height; yi++){

  753.             int xi;

  754.             for (xi = 0; xi < cblknw; xi++){

  755.                 Jpeg2000Cblk *cblk = prec->cblk + yi * cblknw + xi;

  756.                 if (cblk->ninclpasses){

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

  758.                         return -1;

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

  760.                                                                - cblk->passes[cblk->ninclpasses-1].flushed_len);

  761.                     bytestream_put_buffer(&s->buf, cblk->passes[cblk->ninclpasses-1].flushed,

  762.                                                    cblk->passes[cblk->ninclpasses-1].flushed_len);

  763.                 }

  764.             }

  765.         }

  766.     }

  767.     return 0;

  768. }

  769. 

  770. static int encode_packets(Jpeg2000EncoderContext *s, Jpeg2000Tile *tile, int tileno)

  771. {

  772.     int compno, reslevelno, ret;

  773.     Jpeg2000CodingStyle *codsty = &s->codsty;

  774.     Jpeg2000QuantStyle  *qntsty = &s->qntsty;

  775. 

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

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

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

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

  780.             int precno;

  781.             Jpeg2000ResLevel *reslevel = s->tile[tileno].comp[compno].reslevel + reslevelno;

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

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

  784.                               qntsty->nguardbits)) < 0)

  785.                     return ret;

  786.             }

  787.         }

  788.     }

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

  790.     return 0;

  791. }

  792. 

  793. static int getcut(Jpeg2000Cblk *cblk, int64_t lambda, int dwt_norm)

  794. {

  795.     int passno, res = 0;

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

  797.         int dr;

  798.         int64_t dd;

  799. 

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

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

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

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

  804. 

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

  806.             res = passno+1;

  807.     }

  808.     return res;

  809. }

  810. 

  811. static void truncpasses(Jpeg2000EncoderContext *s, Jpeg2000Tile *tile)

  812. {

  813.     int precno, compno, reslevelno, bandno, cblkno, lev;

  814.     Jpeg2000CodingStyle *codsty = &s->codsty;

  815. 

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

  817.         Jpeg2000Component *comp = tile->comp + compno;

  818. 

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

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

  821. 

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

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

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

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

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

  827. 

  828.                     for (cblkno = 0; cblkno < prec->nb_codeblocks_height * prec->nb_codeblocks_width; cblkno++){

  829.                         Jpeg2000Cblk *cblk = prec->cblk + cblkno;

  830. 

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

  832.                                 (int64_t)dwt_norms[codsty->transform == FF_DWT53][bandpos][lev] * (int64_t)band->i_stepsize >> 15);

  833.                     }

  834.                 }

  835.             }

  836.         }

  837.     }

  838. }

  839. 

  840. static int encode_tile(Jpeg2000EncoderContext *s, Jpeg2000Tile *tile, int tileno)

  841. {

  842.     int compno, reslevelno, bandno, ret;

  843.     Jpeg2000T1Context t1;

  844.     Jpeg2000CodingStyle *codsty = &s->codsty;

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

  846.         Jpeg2000Component *comp = s->tile[tileno].comp + compno;

  847. 

  848.         t1.stride = (1<<codsty->log2_cblk_width) + 2;

  849. 

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

  851.         if ((ret = ff_dwt_encode(&comp->dwt, comp->i_data)) < 0)

  852.             return ret;

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

  854. 

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

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

  857. 

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

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

  860.                 Jpeg2000Prec *prec = band->prec; // we support only 1 precinct per band ATM in the encoder

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

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

  863.                 y0 = yy0;

  864.                 yy1 = FFMIN(ff_jpeg2000_ceildivpow2(band->coord[1][0] + 1, band->log2_cblk_height) << band->log2_cblk_height,

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

  866. 

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

  868.                     continue;

  869. 

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

  871. 

  872.                 for (cblky = 0; cblky < prec->nb_codeblocks_height; cblky++){

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

  874.                         xx0 = 0;

  875.                     else

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

  877.                     x0 = xx0;

  878.                     xx1 = FFMIN(ff_jpeg2000_ceildivpow2(band->coord[0][0] + 1, band->log2_cblk_width) << band->log2_cblk_width,

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

  880. 

  881.                     for (cblkx = 0; cblkx < prec->nb_codeblocks_width; cblkx++, cblkno++){

  882.                         int y, x;

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

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

  885.                                 int *ptr = t1.data + (y-yy0)*t1.stride;

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

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

  888.                                 }

  889.                             }

  890.                         } else{

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

  892.                                 int *ptr = t1.data + (y-yy0)*t1.stride;

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

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

  895.                                     *ptr = (int64_t)*ptr * (int64_t)(16384 * 65536 / band->i_stepsize) >> 15 - NMSEDEC_FRACBITS;

  896.                                     ptr++;

  897.                                 }

  898.                             }

  899.                         }

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

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

  902.                         xx0 = xx1;

  903.                         xx1 = FFMIN(xx1 + (1 << band->log2_cblk_width), band->coord[0][1] - band->coord[0][0] + x0);

  904.                     }

  905.                     yy0 = yy1;

  906.                     yy1 = FFMIN(yy1 + (1 << band->log2_cblk_height), band->coord[1][1] - band->coord[1][0] + y0);

  907.                 }

  908.             }

  909.         }

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

  911.     }

  912. 

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

  914.     truncpasses(s, tile);

  915.     if ((ret = encode_packets(s, tile, tileno)) < 0)

  916.         return ret;

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

  918.     return 0;

  919. }

  920. 

  921. static void cleanup(Jpeg2000EncoderContext *s)

  922. {

  923.     int tileno, compno;

  924.     Jpeg2000CodingStyle *codsty = &s->codsty;

  925. 

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

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

  928.             Jpeg2000Component *comp = s->tile[tileno].comp + compno;

  929.             ff_jpeg2000_cleanup(comp, codsty);

  930.         }

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

  932.     }

  933.     av_freep(&s->tile);

  934. }

  935. 

  936. static void reinit(Jpeg2000EncoderContext *s)

  937. {

  938.     int tileno, compno;

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

  940.         Jpeg2000Tile *tile = s->tile + tileno;

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

  942.             ff_jpeg2000_reinit(tile->comp + compno, &s->codsty);

  943.     }

  944. }

  945. 

  946. static void update_size(uint8_t *size, const uint8_t *end)

  947. {

  948.     AV_WB32(size, end-size);

  949. }

  950. 

  951. static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,

  952.                         const AVFrame *pict, int *got_packet)

  953. {

  954.     int tileno, ret;

  955.     Jpeg2000EncoderContext *s = avctx->priv_data;

  956.     uint8_t *chunkstart, *jp2cstart, *jp2hstart;

  957. 

  958.     if ((ret = ff_alloc_packet2(avctx, pkt, avctx->width*avctx->height*9 + FF_MIN_BUFFER_SIZE)) < 0)

  959.         return ret;

  960. 

  961.     // init:

  962.     s->buf = s->buf_start = pkt->data;

  963.     s->buf_end = pkt->data + pkt->size;

  964. 

  965.     s->picture = pict;

  966. 

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

  968. 

  969.     copy_frame(s);

  970.     reinit(s);

  971. 

  972.     if (s->format == CODEC_JP2) {

  973.         av_assert0(s->buf == pkt->data);

  974. 

  975.         bytestream_put_be32(&s->buf, 0x0000000C);

  976.         bytestream_put_be32(&s->buf, 0x6A502020);

  977.         bytestream_put_be32(&s->buf, 0x0D0A870A);

  978. 

  979.         chunkstart = s->buf;

  980.         bytestream_put_be32(&s->buf, 0);

  981.         bytestream_put_buffer(&s->buf, "ftyp", 4);

  982.         bytestream_put_buffer(&s->buf, "jp2\040\040", 4);

  983.         bytestream_put_be32(&s->buf, 0);

  984.         bytestream_put_buffer(&s->buf, "jp2\040", 4);

  985.         update_size(chunkstart, s->buf);

  986. 

  987.         jp2hstart = s->buf;

  988.         bytestream_put_be32(&s->buf, 0);

  989.         bytestream_put_buffer(&s->buf, "jp2h", 4);

  990. 

  991.         chunkstart = s->buf;

  992.         bytestream_put_be32(&s->buf, 0);

  993.         bytestream_put_buffer(&s->buf, "ihdr", 4);

  994.         bytestream_put_be32(&s->buf, avctx->height);

  995.         bytestream_put_be32(&s->buf, avctx->width);

  996.         bytestream_put_be16(&s->buf, s->ncomponents);

  997.         bytestream_put_byte(&s->buf, s->cbps[0]);

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

  999.         bytestream_put_byte(&s->buf, 0);

  1000.         bytestream_put_byte(&s->buf, 0);

  1001.         update_size(chunkstart, s->buf);

  1002. 

  1003.         chunkstart = s->buf;

  1004.         bytestream_put_be32(&s->buf, 0);

  1005.         bytestream_put_buffer(&s->buf, "colr", 4);

  1006.         bytestream_put_byte(&s->buf, 1);

  1007.         bytestream_put_byte(&s->buf, 0);

  1008.         bytestream_put_byte(&s->buf, 0);

  1009.         if (s->ncomponents == 1) {

  1010.             bytestream_put_be32(&s->buf, 17);

  1011.         } else if (avctx->pix_fmt == AV_PIX_FMT_RGB24) {

  1012.             bytestream_put_be32(&s->buf, 16);

  1013.         } else {

  1014.             bytestream_put_be32(&s->buf, 18);

  1015.         }

  1016.         update_size(chunkstart, s->buf);

  1017.         update_size(jp2hstart, s->buf);

  1018. 

  1019.         jp2cstart = s->buf;

  1020.         bytestream_put_be32(&s->buf, 0);

  1021.         bytestream_put_buffer(&s->buf, "jp2c", 4);

  1022.     }

  1023. 

  1024.     if (s->buf_end - s->buf < 2)

  1025.         return -1;

  1026.     bytestream_put_be16(&s->buf, JPEG2000_SOC);

  1027.     if ((ret = put_siz(s)) < 0)

  1028.         return ret;

  1029.     if ((ret = put_cod(s)) < 0)

  1030.         return ret;

  1031.     if ((ret = put_qcd(s, 0)) < 0)

  1032.         return ret;

  1033.     if ((ret = put_com(s, 0)) < 0)

  1034.         return ret;

  1035. 

  1036.     for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++){

  1037.         uint8_t *psotptr;

  1038.         if (!(psotptr = put_sot(s, tileno)))

  1039.             return -1;

  1040.         if (s->buf_end - s->buf < 2)

  1041.             return -1;

  1042.         bytestream_put_be16(&s->buf, JPEG2000_SOD);

  1043.         if ((ret = encode_tile(s, s->tile + tileno, tileno)) < 0)

  1044.             return ret;

  1045.         bytestream_put_be32(&psotptr, s->buf - psotptr + 6);

  1046.     }

  1047.     if (s->buf_end - s->buf < 2)

  1048.         return -1;

  1049.     bytestream_put_be16(&s->buf, JPEG2000_EOC);

  1050. 

  1051.     if (s->format == CODEC_JP2)

  1052.         update_size(jp2cstart, s->buf);

  1053. 

  1054.     av_log(s->avctx, AV_LOG_DEBUG, "end\n");

  1055.     pkt->size = s->buf - s->buf_start;

  1056.     pkt->flags |= AV_PKT_FLAG_KEY;

  1057.     *got_packet = 1;

  1058. 

  1059.     return 0;

  1060. }

  1061. 

  1062. static av_cold int j2kenc_init(AVCodecContext *avctx)

  1063. {

  1064.     int i, ret;

  1065.     Jpeg2000EncoderContext *s = avctx->priv_data;

  1066.     Jpeg2000CodingStyle *codsty = &s->codsty;

  1067.     Jpeg2000QuantStyle  *qntsty = &s->qntsty;

  1068. 

  1069.     s->avctx = avctx;

  1070.     av_log(s->avctx, AV_LOG_DEBUG, "init\n");

  1071. 

  1072.     // defaults:

  1073.     // TODO: implement setting non-standard precinct size

  1074.     memset(codsty->log2_prec_widths , 15, sizeof(codsty->log2_prec_widths ));

  1075.     memset(codsty->log2_prec_heights, 15, sizeof(codsty->log2_prec_heights));

  1076.     codsty->nreslevels2decode=

  1077.     codsty->nreslevels       = 7;

  1078.     codsty->log2_cblk_width  = 4;

  1079.     codsty->log2_cblk_height = 4;

  1080.     codsty->transform        = avctx->prediction_method ? FF_DWT53 : FF_DWT97_INT;

  1081. 

  1082.     qntsty->nguardbits       = 1;

  1083. 

  1084.     if ((s->tile_width  & (s->tile_width -1)) ||

  1085.         (s->tile_height & (s->tile_height-1))) {

  1086.         av_log(avctx, AV_LOG_WARNING, "Tile dimension not a power of 2\n");

  1087.     }

  1088. 

  1089.     if (codsty->transform == FF_DWT53)

  1090.         qntsty->quantsty = JPEG2000_QSTY_NONE;

  1091.     else

  1092.         qntsty->quantsty = JPEG2000_QSTY_SE;

  1093. 

  1094.     s->width = avctx->width;

  1095.     s->height = avctx->height;

  1096. 

  1097.     for (i = 0; i < 3; i++)

  1098.         s->cbps[i] = 8;

  1099. 

  1100.     if (avctx->pix_fmt == AV_PIX_FMT_RGB24){

  1101.         s->ncomponents = 3;

  1102.     } else if (avctx->pix_fmt == AV_PIX_FMT_GRAY8){

  1103.         s->ncomponents = 1;

  1104.     } else{ // planar YUV

  1105.         s->planar = 1;

  1106.         s->ncomponents = 3;

  1107.         avcodec_get_chroma_sub_sample(avctx->pix_fmt,

  1108.                 s->chroma_shift, s->chroma_shift + 1);

  1109.     }

  1110. 

  1111.     ff_jpeg2000_init_tier1_luts();

  1112.     ff_mqc_init_context_tables();

  1113.     init_luts();

  1114. 

  1115.     init_quantization(s);

  1116.     if ((ret=init_tiles(s)) < 0)

  1117.         return ret;

  1118. 

  1119.     av_log(s->avctx, AV_LOG_DEBUG, "after init\n");

  1120. 

  1121.     return 0;

  1122. }

  1123. 

  1124. static int j2kenc_destroy(AVCodecContext *avctx)

  1125. {

  1126.     Jpeg2000EncoderContext *s = avctx->priv_data;

  1127. 

  1128.     cleanup(s);

  1129.     return 0;

  1130. }

  1131. 

  1132. // taken from the libopenjpeg wraper so it matches

  1133. 

  1134. #define OFFSET(x) offsetof(Jpeg2000EncoderContext, x)

  1135. #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

  1136. static const AVOption options[] = {

  1137.     { "format",        "Codec Format",      OFFSET(format),        AV_OPT_TYPE_INT,   { .i64 = CODEC_JP2   }, CODEC_J2K, CODEC_JP2,   VE, "format"      },

  1138.     { "j2k",           NULL,                0,                     AV_OPT_TYPE_CONST, { .i64 = CODEC_J2K   }, 0,         0,           VE, "format"      },

  1139.     { "jp2",           NULL,                0,                     AV_OPT_TYPE_CONST, { .i64 = CODEC_JP2   }, 0,         0,           VE, "format"      },

  1140.     { "tile_width",    "Tile Width",        OFFSET(tile_width),    AV_OPT_TYPE_INT,   { .i64 = 256         }, 1,     1<<30,           VE, },

  1141.     { "tile_height",   "Tile Height",       OFFSET(tile_height),   AV_OPT_TYPE_INT,   { .i64 = 256         }, 1,     1<<30,           VE, },

  1142. 

  1143.     { NULL }

  1144. };

  1145. 

  1146. static const AVClass j2k_class = {

  1147.     .class_name = "jpeg 2000 encoder",

  1148.     .item_name  = av_default_item_name,

  1149.     .option     = options,

  1150.     .version    = LIBAVUTIL_VERSION_INT,

  1151. };

  1152. 

  1153. AVCodec ff_jpeg2000_encoder = {

  1154.     .name           = "jpeg2000",

  1155.     .long_name      = NULL_IF_CONFIG_SMALL("JPEG 2000"),

  1156.     .type           = AVMEDIA_TYPE_VIDEO,

  1157.     .id             = AV_CODEC_ID_JPEG2000,

  1158.     .priv_data_size = sizeof(Jpeg2000EncoderContext),

  1159.     .init           = j2kenc_init,

  1160.     .encode2        = encode_frame,

  1161.     .close          = j2kenc_destroy,

  1162.     .capabilities   = CODEC_CAP_EXPERIMENTAL,

  1163.     .pix_fmts       = (const enum AVPixelFormat[]) {

  1164.         AV_PIX_FMT_RGB24, AV_PIX_FMT_YUV444P, AV_PIX_FMT_GRAY8,

  1165.         AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,

  1166.         AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,

  1167.         AV_PIX_FMT_NONE

  1168.     },

  1169.     .priv_class     = &j2k_class,

  1170. };