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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.  *

  24.  *

  25.  * This source code incorporates work covered by the following copyright and

  26.  * permission notice:

  27.  *

  28.  * Copyright (c) 2002-2007, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium

  29.  * Copyright (c) 2002-2007, Professor Benoit Macq

  30.  * Copyright (c) 2001-2003, David Janssens

  31.  * Copyright (c) 2002-2003, Yannick Verschueren

  32.  * Copyright (c) 2003-2007, Francois-Olivier Devaux and Antonin Descampe

  33.  * Copyright (c) 2005, Herve Drolon, FreeImage Team

  34.  * Copyright (c) 2007, Callum Lerwick <seg@haxxed.com>

  35.  * All rights reserved.

  36.  *

  37.  * Redistribution and use in source and binary forms, with or without

  38.  * modification, are permitted provided that the following conditions

  39.  * are met:

  40.  * 1. Redistributions of source code must retain the above copyright

  41.  *    notice, this list of conditions and the following disclaimer.

  42.  * 2. Redistributions in binary form must reproduce the above copyright

  43.  *    notice, this list of conditions and the following disclaimer in the

  44.  *    documentation and/or other materials provided with the distribution.

  45.  *

  46.  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'

  47.  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

  48.  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

  49.  * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE

  50.  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

  51.  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

  52.  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

  53.  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

  54.  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

  55.  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

  56.  * POSSIBILITY OF SUCH DAMAGE.

  57.  */

  58. 

  59. 

  60. /**

  61.  * JPEG2000 image encoder

  62.  * @file

  63.  * @author Kamil Nowosad

  64.  */

  65. 

  66. #include <float.h>

  67. #include "avcodec.h"

  68. #include "internal.h"

  69. #include "bytestream.h"

  70. #include "jpeg2000.h"

  71. #include "libavutil/common.h"

  72. #include "libavutil/pixdesc.h"

  73. #include "libavutil/opt.h"

  74. #include "libavutil/intreadwrite.h"

  75. 

  76. #define NMSEDEC_BITS 7

  77. #define NMSEDEC_FRACBITS (NMSEDEC_BITS-1)

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

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

  80. 

  81. #define CODEC_JP2 1

  82. #define CODEC_J2K 0

  83. 

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

  85.            lut_nmsedec_ref0[1<<NMSEDEC_BITS],

  86.            lut_nmsedec_sig [1<<NMSEDEC_BITS],

  87.            lut_nmsedec_sig0[1<<NMSEDEC_BITS];

  88. 

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

  90.     {{10000, 19650, 41770,  84030, 169000, 338400,  676900, 1353000, 2706000, 5409000},

  91.      {20220, 39890, 83550, 170400, 342700, 686300, 1373000, 2746000, 5490000},

  92.      {20220, 39890, 83550, 170400, 342700, 686300, 1373000, 2746000, 5490000},

  93.      {20800, 38650, 83070, 171800, 347100, 695900, 1393000, 2786000, 5572000}},

  94. 

  95.     {{10000, 15000, 27500, 53750, 106800, 213400, 426700, 853300, 1707000, 3413000},

  96.      {10380, 15920, 29190, 57030, 113300, 226400, 452500, 904800, 1809000},

  97.      {10380, 15920, 29190, 57030, 113300, 226400, 452500, 904800, 1809000},

  98.      { 7186,  9218, 15860, 30430,  60190, 120100, 240000, 479700,  959300}}

  99. };

  100. 

  101. typedef struct {

  102.    Jpeg2000Component *comp;

  103. } Jpeg2000Tile;

  104. 

  105. typedef struct {

  106.     AVClass *class;

  107.     AVCodecContext *avctx;

  108.     const AVFrame *picture;

  109. 

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

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

  112.     int chroma_shift[2];

  113.     uint8_t planar;

  114.     int ncomponents;

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

  116.     int numXtiles, numYtiles;

  117. 

  118.     uint8_t *buf_start;

  119.     uint8_t *buf;

  120.     uint8_t *buf_end;

  121.     int bit_index;

  122. 

  123.     int64_t lambda;

  124. 

  125.     Jpeg2000CodingStyle codsty;

  126.     Jpeg2000QuantStyle  qntsty;

  127. 

  128.     Jpeg2000Tile *tile;

  129. 

  130.     int format;

  131.     int pred;

  132. } Jpeg2000EncoderContext;

  133. 

  134. 

  135. /* debug */

  136. #if 0

  137. #undef ifprintf

  138. #undef printf

  139. 

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

  141. {

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

  143. }

  144. 

  145. static void printcomp(Jpeg2000Component *comp)

  146. {

  147.     int i;

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

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

  150. }

  151. 

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

  153. {

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

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

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

  157.                 "tiles:\n",

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

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

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

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

  162.         nspaces(fd, 2);

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

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

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

  166.             nspaces(fd, 4);

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

  168.             nspaces(fd, 4);

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

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

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

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

  173.                 nspaces(fd, 6);

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

  175.                 nspaces(fd, 6);

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

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

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

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

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

  181.                     nspaces(fd, 8);

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

  183.                     nspaces(fd, 8);

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

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

  186.                                 band->x0, band->x1,

  187.                                 band->y0, band->y1,

  188.                                 band->codeblock_width, band->codeblock_height,

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

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

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

  192.                         nspaces(fd, 10);

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

  194.                         nspaces(fd, 10);

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

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

  197.                     }

  198.                 }

  199.             }

  200.         }

  201.     }

  202. }

  203. #endif

  204. 

  205. /* bitstream routines */

  206. 

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

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

  209. {

  210.     while (n-- > 0){

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

  212.         {

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

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

  215.         }

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

  217.     }

  218. }

  219. 

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

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

  222. {

  223.     while(--n >= 0)

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

  225. }

  226. 

  227. /** flush the bitstream */

  228. static void j2k_flush(Jpeg2000EncoderContext *s)

  229. {

  230.     if (s->bit_index){

  231.         s->bit_index = 0;

  232.         s->buf++;

  233.     }

  234. }

  235. 

  236. /* tag tree routines */

  237. 

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

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

  240. {

  241.     Jpeg2000TgtNode *stack[30];

  242.     int sp = 1, curval = 0;

  243.     stack[0] = node;

  244. 

  245.     node = node->parent;

  246.     while(node){

  247.         if (node->vis){

  248.             curval = node->val;

  249.             break;

  250.         }

  251.         node->vis++;

  252.         stack[sp++] = node;

  253.         node = node->parent;

  254.     }

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

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

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

  258.             break;

  259.         }

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

  261.         put_bits(s, 1, 1);

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

  263.     }

  264. }

  265. 

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

  267. static void tag_tree_update(Jpeg2000TgtNode *node)

  268. {

  269.     int lev = 0;

  270.     while (node->parent){

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

  272.             break;

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

  274.         node = node->parent;

  275.         lev++;

  276.     }

  277. }

  278. 

  279. static int put_siz(Jpeg2000EncoderContext *s)

  280. {

  281.     int i;

  282. 

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

  284.         return -1;

  285. 

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

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

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

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

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

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

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

  293. 

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

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

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

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

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

  299. 

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

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

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

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

  304.     }

  305.     return 0;

  306. }

  307. 

  308. static int put_cod(Jpeg2000EncoderContext *s)

  309. {

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

  311. 

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

  313.         return -1;

  314. 

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

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

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

  318.     // SGcod

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

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

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

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

  323.     }else{

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

  325.     }

  326.     // SPcod

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

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

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

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

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

  332.     return 0;

  333. }

  334. 

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

  336. {

  337.     int i, size;

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

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

  340. 

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

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

  343.     else // QSTY_SE

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

  345. 

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

  347.         return -1;

  348. 

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

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

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

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

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

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

  355.     else // QSTY_SE

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

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

  358.     return 0;

  359. }

  360. 

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

  362. {

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

  364. 

  365.     if (s->avctx->flags & AV_CODEC_FLAG_BITEXACT)

  366.         return 0;

  367. 

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

  369.         return -1;

  370. 

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

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

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

  374. 

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

  376. 

  377.     return 0;

  378. }

  379. 

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

  381. {

  382.     uint8_t *psotptr;

  383. 

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

  385.         return NULL;

  386. 

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

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

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

  390. 

  391.     psotptr = s->buf;

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

  393. 

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

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

  396.     return psotptr;

  397. }

  398. 

  399. /**

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

  401.  * allocate memory for them

  402.  * divide the input image into tile-components

  403.  */

  404. static int init_tiles(Jpeg2000EncoderContext *s)

  405. {

  406.     int tileno, tilex, tiley, compno;

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

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

  409. 

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

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

  412. 

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

  414.     if (!s->tile)

  415.         return AVERROR(ENOMEM);

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

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

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

  419. 

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

  421.             if (!tile->comp)

  422.                 return AVERROR(ENOMEM);

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

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

  425.                 int ret, i, j;

  426. 

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

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

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

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

  431.                 if (compno > 0)

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

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

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

  435. 

  436.                 if ((ret = ff_jpeg2000_init_component(comp,

  437.                                                 codsty,

  438.                                                 qntsty,

  439.                                                 s->cbps[compno],

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

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

  442.                                                 s->avctx

  443.                                                )) < 0)

  444.                     return ret;

  445.             }

  446.         }

  447.     return 0;

  448. }

  449. 

  450. static void copy_frame(Jpeg2000EncoderContext *s)

  451. {

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

  453.     uint8_t *line;

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

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

  456.         if (s->planar){

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

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

  459.                 int *dst = comp->i_data;

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

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

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

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

  464.                     uint8_t *ptr = line;

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

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

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

  468.                 }

  469.             }

  470.         } else{

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

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

  473. 

  474.             i = 0;

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

  476.                 uint8_t *ptr = line;

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

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

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

  480.                     }

  481.                 }

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

  483.             }

  484.         }

  485.     }

  486. }

  487. 

  488. static void init_quantization(Jpeg2000EncoderContext *s)

  489. {

  490.     int compno, reslevelno, bandno;

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

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

  493. 

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

  495.         int gbandno = 0;

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

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

  498.             nbands = reslevelno ? 3 : 1;

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

  500.                 int expn, mant = 0;

  501. 

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

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

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

  505.                         log = av_log2(ss);

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

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

  508.                 } else

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

  510. 

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

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

  513.             }

  514.         }

  515.     }

  516. }

  517. 

  518. static void init_luts(void)

  519. {

  520.     int i, a,

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

  522. 

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

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

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

  526. 

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

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

  529.                                     << 13-NMSEDEC_FRACBITS, 0);

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

  531.                                     << 1, 0);

  532.     }

  533. }

  534. 

  535. /* tier-1 routines */

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

  537. {

  538.     if (bpno > NMSEDEC_FRACBITS)

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

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

  541. }

  542. 

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

  544. {

  545.     if (bpno > NMSEDEC_FRACBITS)

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

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

  548. }

  549. 

  550. static void encode_sigpass(Jpeg2000T1Context *t1, int width, int height, int bandno, int *nmsedec, int bpno)

  551. {

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

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

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

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

  556.                 if (!(t1->flags[(y+1) * t1->stride + x+1] & JPEG2000_T1_SIG) && (t1->flags[(y+1) * t1->stride + x+1] & JPEG2000_T1_SIG_NB)){

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

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

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

  560.                     if (bit){

  561.                         int xorbit;

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

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

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

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

  566.                     }

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

  568.                 }

  569.             }

  570. }

  571. 

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

  573. {

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

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

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

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

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

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

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

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

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

  583.                 }

  584. }

  585. 

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

  587. {

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

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

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

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

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

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

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

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

  596.             {

  597.                 // aggregation mode

  598.                 int rlen;

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

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

  601.                         break;

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

  603.                 if (rlen == 4)

  604.                     continue;

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

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

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

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

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

  610.                         if (y > y0 + rlen)

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

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

  613.                             int xorbit;

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

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

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

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

  618.                         }

  619.                     }

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

  621.                 }

  622.             } else{

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

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

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

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

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

  628.                             int xorbit;

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

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

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

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

  633.                         }

  634.                     }

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

  636.                 }

  637.             }

  638.         }

  639. }

  640. 

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

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

  643. {

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

  645.     int64_t wmsedec = 0;

  646. 

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

  648. 

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

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

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

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

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

  654.             }

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

  656.         }

  657.     }

  658. 

  659.     if (max == 0){

  660.         cblk->nonzerobits = 0;

  661.         bpno = 0;

  662.     } else{

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

  664.         bpno = cblk->nonzerobits - 1;

  665.     }

  666. 

  667.     cblk->data[0] = 0;

  668.     ff_mqc_initenc(&t1->mqc, cblk->data + 1);

  669. 

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

  671.         nmsedec=0;

  672. 

  673.         switch(pass_t){

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

  675.                     break;

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

  677.                     break;

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

  679.                     break;

  680.         }

  681. 

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

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

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

  685. 

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

  687.             pass_t = 0;

  688.             bpno--;

  689.         }

  690.     }

  691.     cblk->npasses = passno;

  692.     cblk->ninclpasses = passno;

  693. 

  694.     if (passno)

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

  696. }

  697. 

  698. /* tier-2 routines: */

  699. 

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

  701. {

  702.     if (n == 1)

  703.         put_num(s, 0, 1);

  704.     else if (n == 2)

  705.         put_num(s, 2, 2);

  706.     else if (n <= 5)

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

  708.     else if (n <= 36)

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

  710.     else

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

  712. }

  713. 

  714. 

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

  716.                           uint8_t *expn, int numgbits)

  717. {

  718.     int bandno, empty = 1;

  719. 

  720.     // init bitstream

  721.     *s->buf = 0;

  722.     s->bit_index = 0;

  723. 

  724.     // header

  725. 

  726.     // is the packet empty?

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

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

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

  730.             empty = 0;

  731.             break;

  732.         }

  733.     }

  734. 

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

  736.     if (empty){

  737.         j2k_flush(s);

  738.         return 0;

  739.     }

  740. 

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

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

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

  744.         int yi, xi, pos;

  745.         int cblknw = prec->nb_codeblocks_width;

  746. 

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

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

  749.             continue;

  750. 

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

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

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

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

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

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

  757.             }

  758.         }

  759. 

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

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

  762.                 int pad = 0, llen, length;

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

  764. 

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

  766.                     return -1;

  767. 

  768.                 // inclusion information

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

  770.                 if (!cblk->ninclpasses)

  771.                     continue;

  772.                 // zerobits information

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

  774.                 // number of passes

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

  776. 

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

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

  779.                 if (llen < 0){

  780.                     pad = -llen;

  781.                     llen = 0;

  782.                 }

  783.                 // length of code block

  784.                 put_bits(s, 1, llen);

  785.                 put_bits(s, 0, 1);

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

  787.             }

  788.         }

  789.     }

  790.     j2k_flush(s);

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

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

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

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

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

  796.             int xi;

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

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

  799.                 if (cblk->ninclpasses){

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

  801.                         return -1;

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

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

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

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

  806.                 }

  807.             }

  808.         }

  809.     }

  810.     return 0;

  811. }

  812. 

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

  814. {

  815.     int compno, reslevelno, ret;

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

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

  818. 

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

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

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

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

  823.             int precno;

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

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

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

  827.                               qntsty->nguardbits)) < 0)

  828.                     return ret;

  829.             }

  830.         }

  831.     }

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

  833.     return 0;

  834. }

  835. 

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

  837. {

  838.     int passno, res = 0;

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

  840.         int dr;

  841.         int64_t dd;

  842. 

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

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

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

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

  847. 

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

  849.             res = passno+1;

  850.     }

  851.     return res;

  852. }

  853. 

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

  855. {

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

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

  858. 

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

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

  861. 

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

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

  864. 

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

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

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

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

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

  870. 

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

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

  873. 

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

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

  876.                     }

  877.                 }

  878.             }

  879.         }

  880.     }

  881. }

  882. 

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

  884. {

  885.     int compno, reslevelno, bandno, ret;

  886.     Jpeg2000T1Context t1;

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

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

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

  890. 

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

  892. 

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

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

  895.             return ret;

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

  897. 

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

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

  900. 

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

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

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

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

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

  906.                 y0 = yy0;

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

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

  909. 

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

  911.                     continue;

  912. 

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

  914. 

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

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

  917.                         xx0 = 0;

  918.                     else

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

  920.                     x0 = xx0;

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

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

  923. 

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

  925.                         int y, x;

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

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

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

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

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

  931.                                 }

  932.                             }

  933.                         } else{

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

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

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

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

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

  939.                                     ptr++;

  940.                                 }

  941.                             }

  942.                         }

  943.                         if (!prec->cblk[cblkno].data)

  944.                             prec->cblk[cblkno].data = av_malloc(1 + 8192);

  945.                         if (!prec->cblk[cblkno].passes)

  946.                             prec->cblk[cblkno].passes = av_malloc_array(JPEG2000_MAX_PASSES, sizeof (*prec->cblk[cblkno].passes));

  947.                         if (!prec->cblk[cblkno].data || !prec->cblk[cblkno].passes)

  948.                             return AVERROR(ENOMEM);

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

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

  951.                         xx0 = xx1;

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

  953.                     }

  954.                     yy0 = yy1;

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

  956.                 }

  957.             }

  958.         }

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

  960.     }

  961. 

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

  963.     truncpasses(s, tile);

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

  965.         return ret;

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

  967.     return 0;

  968. }

  969. 

  970. static void cleanup(Jpeg2000EncoderContext *s)

  971. {

  972.     int tileno, compno;

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

  974. 

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

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

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

  978.             ff_jpeg2000_cleanup(comp, codsty);

  979.         }

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

  981.     }

  982.     av_freep(&s->tile);

  983. }

  984. 

  985. static void reinit(Jpeg2000EncoderContext *s)

  986. {

  987.     int tileno, compno;

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

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

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

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

  992.     }

  993. }

  994. 

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

  996. {

  997.     AV_WB32(size, end-size);

  998. }

  999. 

  1000. static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,

  1001.                         const AVFrame *pict, int *got_packet)

  1002. {

  1003.     int tileno, ret;

  1004.     Jpeg2000EncoderContext *s = avctx->priv_data;

  1005.     uint8_t *chunkstart, *jp2cstart, *jp2hstart;

  1006. 

  1007.     if ((ret = ff_alloc_packet2(avctx, pkt, avctx->width*avctx->height*9 + AV_INPUT_BUFFER_MIN_SIZE, 0)) < 0)

  1008.         return ret;

  1009. 

  1010.     // init:

  1011.     s->buf = s->buf_start = pkt->data;

  1012.     s->buf_end = pkt->data + pkt->size;

  1013. 

  1014.     s->picture = pict;

  1015. 

  1016.     s->lambda = s->picture->quality * LAMBDA_SCALE;

  1017. 

  1018.     copy_frame(s);

  1019.     reinit(s);

  1020. 

  1021.     if (s->format == CODEC_JP2) {

  1022.         av_assert0(s->buf == pkt->data);

  1023. 

  1024.         bytestream_put_be32(&s->buf, 0x0000000C);

  1025.         bytestream_put_be32(&s->buf, 0x6A502020);

  1026.         bytestream_put_be32(&s->buf, 0x0D0A870A);

  1027. 

  1028.         chunkstart = s->buf;

  1029.         bytestream_put_be32(&s->buf, 0);

  1030.         bytestream_put_buffer(&s->buf, "ftyp", 4);

  1031.         bytestream_put_buffer(&s->buf, "jp2\040\040", 4);

  1032.         bytestream_put_be32(&s->buf, 0);

  1033.         bytestream_put_buffer(&s->buf, "jp2\040", 4);

  1034.         update_size(chunkstart, s->buf);

  1035. 

  1036.         jp2hstart = s->buf;

  1037.         bytestream_put_be32(&s->buf, 0);

  1038.         bytestream_put_buffer(&s->buf, "jp2h", 4);

  1039. 

  1040.         chunkstart = s->buf;

  1041.         bytestream_put_be32(&s->buf, 0);

  1042.         bytestream_put_buffer(&s->buf, "ihdr", 4);

  1043.         bytestream_put_be32(&s->buf, avctx->height);

  1044.         bytestream_put_be32(&s->buf, avctx->width);

  1045.         bytestream_put_be16(&s->buf, s->ncomponents);

  1046.         bytestream_put_byte(&s->buf, s->cbps[0]);

  1047.         bytestream_put_byte(&s->buf, 7);

  1048.         bytestream_put_byte(&s->buf, 0);

  1049.         bytestream_put_byte(&s->buf, 0);

  1050.         update_size(chunkstart, s->buf);

  1051. 

  1052.         chunkstart = s->buf;

  1053.         bytestream_put_be32(&s->buf, 0);

  1054.         bytestream_put_buffer(&s->buf, "colr", 4);

  1055.         bytestream_put_byte(&s->buf, 1);

  1056.         bytestream_put_byte(&s->buf, 0);

  1057.         bytestream_put_byte(&s->buf, 0);

  1058.         if (avctx->pix_fmt == AV_PIX_FMT_RGB24 || avctx->pix_fmt == AV_PIX_FMT_PAL8) {

  1059.             bytestream_put_be32(&s->buf, 16);

  1060.         } else if (s->ncomponents == 1) {

  1061.             bytestream_put_be32(&s->buf, 17);

  1062.         } else {

  1063.             bytestream_put_be32(&s->buf, 18);

  1064.         }

  1065.         update_size(chunkstart, s->buf);

  1066.         if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {

  1067.             int i;

  1068.             uint8_t *palette = pict->data[1];

  1069.             chunkstart = s->buf;

  1070.             bytestream_put_be32(&s->buf, 0);

  1071.             bytestream_put_buffer(&s->buf, "pclr", 4);

  1072.             bytestream_put_be16(&s->buf, AVPALETTE_COUNT);

  1073.             bytestream_put_byte(&s->buf, 3); // colour channels

  1074.             bytestream_put_be24(&s->buf, 0x070707); //colour depths

  1075.             for (i = 0; i < AVPALETTE_COUNT; i++) {

  1076.                 bytestream_put_be24(&s->buf, HAVE_BIGENDIAN ? AV_RB24(palette + 1) : AV_RL24(palette));

  1077.                 palette += 4;

  1078.             }

  1079.             update_size(chunkstart, s->buf);

  1080.             chunkstart = s->buf;

  1081.             bytestream_put_be32(&s->buf, 0);

  1082.             bytestream_put_buffer(&s->buf, "cmap", 4);

  1083.             for (i = 0; i < 3; i++) {

  1084.                 bytestream_put_be16(&s->buf, 0); // component

  1085.                 bytestream_put_byte(&s->buf, 1); // palette mapping

  1086.                 bytestream_put_byte(&s->buf, i); // index

  1087.             }

  1088.             update_size(chunkstart, s->buf);

  1089.         }

  1090.         update_size(jp2hstart, s->buf);

  1091. 

  1092.         jp2cstart = s->buf;

  1093.         bytestream_put_be32(&s->buf, 0);

  1094.         bytestream_put_buffer(&s->buf, "jp2c", 4);

  1095.     }

  1096. 

  1097.     if (s->buf_end - s->buf < 2)

  1098.         return -1;

  1099.     bytestream_put_be16(&s->buf, JPEG2000_SOC);

  1100.     if ((ret = put_siz(s)) < 0)

  1101.         return ret;

  1102.     if ((ret = put_cod(s)) < 0)

  1103.         return ret;

  1104.     if ((ret = put_qcd(s, 0)) < 0)

  1105.         return ret;

  1106.     if ((ret = put_com(s, 0)) < 0)

  1107.         return ret;

  1108. 

  1109.     for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++){

  1110.         uint8_t *psotptr;

  1111.         if (!(psotptr = put_sot(s, tileno)))

  1112.             return -1;

  1113.         if (s->buf_end - s->buf < 2)

  1114.             return -1;

  1115.         bytestream_put_be16(&s->buf, JPEG2000_SOD);

  1116.         if ((ret = encode_tile(s, s->tile + tileno, tileno)) < 0)

  1117.             return ret;

  1118.         bytestream_put_be32(&psotptr, s->buf - psotptr + 6);

  1119.     }

  1120.     if (s->buf_end - s->buf < 2)

  1121.         return -1;

  1122.     bytestream_put_be16(&s->buf, JPEG2000_EOC);

  1123. 

  1124.     if (s->format == CODEC_JP2)

  1125.         update_size(jp2cstart, s->buf);

  1126. 

  1127.     av_log(s->avctx, AV_LOG_DEBUG, "end\n");

  1128.     pkt->size = s->buf - s->buf_start;

  1129.     pkt->flags |= AV_PKT_FLAG_KEY;

  1130.     *got_packet = 1;

  1131. 

  1132.     return 0;

  1133. }

  1134. 

  1135. static av_cold int j2kenc_init(AVCodecContext *avctx)

  1136. {

  1137.     int i, ret;

  1138.     Jpeg2000EncoderContext *s = avctx->priv_data;

  1139.     Jpeg2000CodingStyle *codsty = &s->codsty;

  1140.     Jpeg2000QuantStyle  *qntsty = &s->qntsty;

  1141. 

  1142.     s->avctx = avctx;

  1143.     av_log(s->avctx, AV_LOG_DEBUG, "init\n");

  1144. 

  1145. #if FF_API_PRIVATE_OPT

  1146. FF_DISABLE_DEPRECATION_WARNINGS

  1147.     if (avctx->prediction_method)

  1148.         s->pred = avctx->prediction_method;

  1149. FF_ENABLE_DEPRECATION_WARNINGS

  1150. #endif

  1151. 

  1152.     if (avctx->pix_fmt == AV_PIX_FMT_PAL8 && (s->pred != FF_DWT97_INT || s->format != CODEC_JP2)) {

  1153.         av_log(s->avctx, AV_LOG_WARNING, "Forcing lossless jp2 for pal8\n");

  1154.         s->pred = FF_DWT97_INT;

  1155.         s->format = CODEC_JP2;

  1156.     }

  1157. 

  1158.     // defaults:

  1159.     // TODO: implement setting non-standard precinct size

  1160.     memset(codsty->log2_prec_widths , 15, sizeof(codsty->log2_prec_widths ));

  1161.     memset(codsty->log2_prec_heights, 15, sizeof(codsty->log2_prec_heights));

  1162.     codsty->nreslevels2decode=

  1163.     codsty->nreslevels       = 7;

  1164.     codsty->log2_cblk_width  = 4;

  1165.     codsty->log2_cblk_height = 4;

  1166.     codsty->transform        = s->pred ? FF_DWT53 : FF_DWT97_INT;

  1167. 

  1168.     qntsty->nguardbits       = 1;

  1169. 

  1170.     if ((s->tile_width  & (s->tile_width -1)) ||

  1171.         (s->tile_height & (s->tile_height-1))) {

  1172.         av_log(avctx, AV_LOG_WARNING, "Tile dimension not a power of 2\n");

  1173.     }

  1174. 

  1175.     if (codsty->transform == FF_DWT53)

  1176.         qntsty->quantsty = JPEG2000_QSTY_NONE;

  1177.     else

  1178.         qntsty->quantsty = JPEG2000_QSTY_SE;

  1179. 

  1180.     s->width = avctx->width;

  1181.     s->height = avctx->height;

  1182. 

  1183.     for (i = 0; i < 3; i++)

  1184.         s->cbps[i] = 8;

  1185. 

  1186.     if (avctx->pix_fmt == AV_PIX_FMT_RGB24){

  1187.         s->ncomponents = 3;

  1188.     } else if (avctx->pix_fmt == AV_PIX_FMT_GRAY8 || avctx->pix_fmt == AV_PIX_FMT_PAL8){

  1189.         s->ncomponents = 1;

  1190.     } else{ // planar YUV

  1191.         s->planar = 1;

  1192.         s->ncomponents = 3;

  1193.         ret = av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt,

  1194.                                                s->chroma_shift, s->chroma_shift + 1);

  1195.         if (ret)

  1196.             return ret;

  1197.     }

  1198. 

  1199.     ff_jpeg2000_init_tier1_luts();

  1200.     ff_mqc_init_context_tables();

  1201.     init_luts();

  1202. 

  1203.     init_quantization(s);

  1204.     if ((ret=init_tiles(s)) < 0)

  1205.         return ret;

  1206. 

  1207.     av_log(s->avctx, AV_LOG_DEBUG, "after init\n");

  1208. 

  1209.     return 0;

  1210. }

  1211. 

  1212. static int j2kenc_destroy(AVCodecContext *avctx)

  1213. {

  1214.     Jpeg2000EncoderContext *s = avctx->priv_data;

  1215. 

  1216.     cleanup(s);

  1217.     return 0;

  1218. }

  1219. 

  1220. // taken from the libopenjpeg wraper so it matches

  1221. 

  1222. #define OFFSET(x) offsetof(Jpeg2000EncoderContext, x)

  1223. #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

  1224. static const AVOption options[] = {

  1225.     { "format",        "Codec Format",      OFFSET(format),        AV_OPT_TYPE_INT,   { .i64 = CODEC_JP2   }, CODEC_J2K, CODEC_JP2,   VE, "format"      },

  1226.     { "j2k",           NULL,                0,                     AV_OPT_TYPE_CONST, { .i64 = CODEC_J2K   }, 0,         0,           VE, "format"      },

  1227.     { "jp2",           NULL,                0,                     AV_OPT_TYPE_CONST, { .i64 = CODEC_JP2   }, 0,         0,           VE, "format"      },

  1228.     { "tile_width",    "Tile Width",        OFFSET(tile_width),    AV_OPT_TYPE_INT,   { .i64 = 256         }, 1,     1<<30,           VE, },

  1229.     { "tile_height",   "Tile Height",       OFFSET(tile_height),   AV_OPT_TYPE_INT,   { .i64 = 256         }, 1,     1<<30,           VE, },

  1230.     { "pred",          "DWT Type",          OFFSET(pred),          AV_OPT_TYPE_INT,   { .i64 = 0           }, 0,         1,           VE, "pred"        },

  1231.     { "dwt97int",      NULL,                0,                     AV_OPT_TYPE_CONST, { .i64 = 0           }, INT_MIN, INT_MAX,       VE, "pred"        },

  1232.     { "dwt53",         NULL,                0,                     AV_OPT_TYPE_CONST, { .i64 = 0           }, INT_MIN, INT_MAX,       VE, "pred"        },

  1233. 

  1234.     { NULL }

  1235. };

  1236. 

  1237. static const AVClass j2k_class = {

  1238.     .class_name = "jpeg 2000 encoder",

  1239.     .item_name  = av_default_item_name,

  1240.     .option     = options,

  1241.     .version    = LIBAVUTIL_VERSION_INT,

  1242. };

  1243. 

  1244. AVCodec ff_jpeg2000_encoder = {

  1245.     .name           = "jpeg2000",

  1246.     .long_name      = NULL_IF_CONFIG_SMALL("JPEG 2000"),

  1247.     .type           = AVMEDIA_TYPE_VIDEO,

  1248.     .id             = AV_CODEC_ID_JPEG2000,

  1249.     .priv_data_size = sizeof(Jpeg2000EncoderContext),

  1250.     .init           = j2kenc_init,

  1251.     .encode2        = encode_frame,

  1252.     .close          = j2kenc_destroy,

  1253.     .pix_fmts       = (const enum AVPixelFormat[]) {

  1254.         AV_PIX_FMT_RGB24, AV_PIX_FMT_YUV444P, AV_PIX_FMT_GRAY8,

  1255.         AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,

  1256.         AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,

  1257.         AV_PIX_FMT_PAL8,

  1258.         AV_PIX_FMT_NONE

  1259.     },

  1260.     .priv_class     = &j2k_class,

  1261. };