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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. 

  75. #define NMSEDEC_BITS 7

  76. #define NMSEDEC_FRACBITS (NMSEDEC_BITS-1)

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

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

  79. 

  80. #define CODEC_JP2 1

  81. #define CODEC_J2K 0

  82. 

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

  84.            lut_nmsedec_ref0[1<<NMSEDEC_BITS],

  85.            lut_nmsedec_sig [1<<NMSEDEC_BITS],

  86.            lut_nmsedec_sig0[1<<NMSEDEC_BITS];

  87. 

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

  89.     {{10000, 19650, 41770,  84030, 169000, 338400,  676900, 1353000, 2706000, 5409000},

  90.      {20220, 39890, 83550, 170400, 342700, 686300, 1373000, 2746000, 5490000},

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

  92.      {20800, 38650, 83070, 171800, 347100, 695900, 1393000, 2786000, 5572000}},

  93. 

  94.     {{10000, 15000, 27500, 53750, 106800, 213400, 426700, 853300, 1707000, 3413000},

  95.      {10380, 15920, 29190, 57030, 113300, 226400, 452500, 904800, 1809000},

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

  97.      { 7186,  9218, 15860, 30430,  60190, 120100, 240000, 479700,  959300}}

  98. };

  99. 

  100. typedef struct {

  101.    Jpeg2000Component *comp;

  102. } Jpeg2000Tile;

  103. 

  104. typedef struct {

  105.     AVClass *class;

  106.     AVCodecContext *avctx;

  107.     const AVFrame *picture;

  108. 

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

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

  111.     int chroma_shift[2];

  112.     uint8_t planar;

  113.     int ncomponents;

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

  115.     int numXtiles, numYtiles;

  116. 

  117.     uint8_t *buf_start;

  118.     uint8_t *buf;

  119.     uint8_t *buf_end;

  120.     int bit_index;

  121. 

  122.     int64_t lambda;

  123. 

  124.     Jpeg2000CodingStyle codsty;

  125.     Jpeg2000QuantStyle  qntsty;

  126. 

  127.     Jpeg2000Tile *tile;

  128. 

  129.     int format;

  130.     int pred;

  131. } Jpeg2000EncoderContext;

  132. 

  133. 

  134. /* debug */

  135. #if 0

  136. #undef ifprintf

  137. #undef printf

  138. 

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

  140. {

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

  142. }

  143. 

  144. static void printcomp(Jpeg2000Component *comp)

  145. {

  146.     int i;

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

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

  149. }

  150. 

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

  152. {

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

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

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

  156.                 "tiles:\n",

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

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

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

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

  161.         nspaces(fd, 2);

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

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

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

  165.             nspaces(fd, 4);

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

  167.             nspaces(fd, 4);

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

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

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

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

  172.                 nspaces(fd, 6);

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

  174.                 nspaces(fd, 6);

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

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

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

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

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

  180.                     nspaces(fd, 8);

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

  182.                     nspaces(fd, 8);

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

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

  185.                                 band->x0, band->x1,

  186.                                 band->y0, band->y1,

  187.                                 band->codeblock_width, band->codeblock_height,

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

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

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

  191.                         nspaces(fd, 10);

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

  193.                         nspaces(fd, 10);

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

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

  196.                     }

  197.                 }

  198.             }

  199.         }

  200.     }

  201. }

  202. #endif

  203. 

  204. /* bitstream routines */

  205. 

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

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

  208. {

  209.     while (n-- > 0){

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

  211.         {

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

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

  214.         }

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

  216.     }

  217. }

  218. 

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

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

  221. {

  222.     while(--n >= 0)

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

  224. }

  225. 

  226. /** flush the bitstream */

  227. static void j2k_flush(Jpeg2000EncoderContext *s)

  228. {

  229.     if (s->bit_index){

  230.         s->bit_index = 0;

  231.         s->buf++;

  232.     }

  233. }

  234. 

  235. /* tag tree routines */

  236. 

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

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

  239. {

  240.     Jpeg2000TgtNode *stack[30];

  241.     int sp = 1, curval = 0;

  242.     stack[0] = node;

  243. 

  244.     node = node->parent;

  245.     while(node){

  246.         if (node->vis){

  247.             curval = node->val;

  248.             break;

  249.         }

  250.         node->vis++;

  251.         stack[sp++] = node;

  252.         node = node->parent;

  253.     }

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

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

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

  257.             break;

  258.         }

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

  260.         put_bits(s, 1, 1);

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

  262.     }

  263. }

  264. 

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

  266. static void tag_tree_update(Jpeg2000TgtNode *node)

  267. {

  268.     int lev = 0;

  269.     while (node->parent){

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

  271.             break;

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

  273.         node = node->parent;

  274.         lev++;

  275.     }

  276. }

  277. 

  278. static int put_siz(Jpeg2000EncoderContext *s)

  279. {

  280.     int i;

  281. 

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

  283.         return -1;

  284. 

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

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

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

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

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

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

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

  292. 

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

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

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

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

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

  298. 

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

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

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

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

  303.     }

  304.     return 0;

  305. }

  306. 

  307. static int put_cod(Jpeg2000EncoderContext *s)

  308. {

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

  310. 

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

  312.         return -1;

  313. 

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

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

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

  317.     // SGcod

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

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

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

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

  322.     }else{

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

  324.     }

  325.     // SPcod

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

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

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

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

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

  331.     return 0;

  332. }

  333. 

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

  335. {

  336.     int i, size;

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

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

  339. 

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

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

  342.     else // QSTY_SE

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

  344. 

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

  346.         return -1;

  347. 

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

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

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

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

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

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

  354.     else // QSTY_SE

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

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

  357.     return 0;

  358. }

  359. 

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

  361. {

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

  363. 

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

  365.         return 0;

  366. 

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

  368.         return -1;

  369. 

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

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

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

  373. 

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

  375. 

  376.     return 0;

  377. }

  378. 

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

  380. {

  381.     uint8_t *psotptr;

  382. 

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

  384.         return NULL;

  385. 

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

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

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

  389. 

  390.     psotptr = s->buf;

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

  392. 

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

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

  395.     return psotptr;

  396. }

  397. 

  398. /**

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

  400.  * allocate memory for them

  401.  * divide the input image into tile-components

  402.  */

  403. static int init_tiles(Jpeg2000EncoderContext *s)

  404. {

  405.     int tileno, tilex, tiley, compno;

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

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

  408. 

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

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

  411. 

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

  413.     if (!s->tile)

  414.         return AVERROR(ENOMEM);

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

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

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

  418. 

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

  420.             if (!tile->comp)

  421.                 return AVERROR(ENOMEM);

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

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

  424.                 int ret, i, j;

  425. 

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

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

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

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

  430.                 if (compno > 0)

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

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

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

  434. 

  435.                 if ((ret = ff_jpeg2000_init_component(comp,

  436.                                                 codsty,

  437.                                                 qntsty,

  438.                                                 s->cbps[compno],

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

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

  441.                                                 s->avctx

  442.                                                )) < 0)

  443.                     return ret;

  444.             }

  445.         }

  446.     return 0;

  447. }

  448. 

  449. static void copy_frame(Jpeg2000EncoderContext *s)

  450. {

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

  452.     uint8_t *line;

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

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

  455.         if (s->planar){

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

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

  458.                 int *dst = comp->i_data;

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

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

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

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

  463.                     uint8_t *ptr = line;

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

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

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

  467.                 }

  468.             }

  469.         } else{

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

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

  472. 

  473.             i = 0;

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

  475.                 uint8_t *ptr = line;

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

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

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

  479.                     }

  480.                 }

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

  482.             }

  483.         }

  484.     }

  485. }

  486. 

  487. static void init_quantization(Jpeg2000EncoderContext *s)

  488. {

  489.     int compno, reslevelno, bandno;

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

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

  492. 

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

  494.         int gbandno = 0;

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

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

  497.             nbands = reslevelno ? 3 : 1;

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

  499.                 int expn, mant = 0;

  500. 

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

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

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

  504.                         log = av_log2(ss);

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

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

  507.                 } else

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

  509. 

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

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

  512.             }

  513.         }

  514.     }

  515. }

  516. 

  517. static void init_luts(void)

  518. {

  519.     int i, a,

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

  521. 

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

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

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

  525. 

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

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

  528.                                     << 13-NMSEDEC_FRACBITS, 0);

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

  530.                                     << 1, 0);

  531.     }

  532. }

  533. 

  534. /* tier-1 routines */

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

  536. {

  537.     if (bpno > NMSEDEC_FRACBITS)

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

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

  540. }

  541. 

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

  543. {

  544.     if (bpno > NMSEDEC_FRACBITS)

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

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

  547. }

  548. 

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

  550. {

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

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

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

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

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

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

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

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

  559.                     if (bit){

  560.                         int xorbit;

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

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

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

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

  565.                     }

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

  567.                 }

  568.             }

  569. }

  570. 

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

  572. {

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

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

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

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

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

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

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

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

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

  582.                 }

  583. }

  584. 

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

  586. {

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

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

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

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

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

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

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

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

  595.             {

  596.                 // aggregation mode

  597.                 int rlen;

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

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

  600.                         break;

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

  602.                 if (rlen == 4)

  603.                     continue;

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

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

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

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

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

  609.                         if (y > y0 + rlen)

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

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

  612.                             int xorbit;

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

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

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

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

  617.                         }

  618.                     }

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

  620.                 }

  621.             } else{

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

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

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

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

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

  627.                             int xorbit;

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

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

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

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

  632.                         }

  633.                     }

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

  635.                 }

  636.             }

  637.         }

  638. }

  639. 

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

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

  642. {

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

  644.     int64_t wmsedec = 0;

  645. 

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

  647. 

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

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

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

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

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

  653.             }

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

  655.         }

  656.     }

  657. 

  658.     if (max == 0){

  659.         cblk->nonzerobits = 0;

  660.         bpno = 0;

  661.     } else{

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

  663.         bpno = cblk->nonzerobits - 1;

  664.     }

  665. 

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

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

  668. 

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

  670.         nmsedec=0;

  671. 

  672.         switch(pass_t){

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

  674.                     break;

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

  676.                     break;

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

  678.                     break;

  679.         }

  680. 

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

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

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

  684. 

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

  686.             pass_t = 0;

  687.             bpno--;

  688.         }

  689.     }

  690.     cblk->npasses = passno;

  691.     cblk->ninclpasses = passno;

  692. 

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

  694. }

  695. 

  696. /* tier-2 routines: */

  697. 

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

  699. {

  700.     if (n == 1)

  701.         put_num(s, 0, 1);

  702.     else if (n == 2)

  703.         put_num(s, 2, 2);

  704.     else if (n <= 5)

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

  706.     else if (n <= 36)

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

  708.     else

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

  710. }

  711. 

  712. 

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

  714.                           uint8_t *expn, int numgbits)

  715. {

  716.     int bandno, empty = 1;

  717. 

  718.     // init bitstream

  719.     *s->buf = 0;

  720.     s->bit_index = 0;

  721. 

  722.     // header

  723. 

  724.     // is the packet empty?

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

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

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

  728.             empty = 0;

  729.             break;

  730.         }

  731.     }

  732. 

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

  734.     if (empty){

  735.         j2k_flush(s);

  736.         return 0;

  737.     }

  738. 

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

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

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

  742.         int yi, xi, pos;

  743.         int cblknw = prec->nb_codeblocks_width;

  744. 

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

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

  747.             continue;

  748. 

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

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

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

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

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

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

  755.             }

  756.         }

  757. 

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

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

  760.                 int pad = 0, llen, length;

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

  762. 

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

  764.                     return -1;

  765. 

  766.                 // inclusion information

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

  768.                 if (!cblk->ninclpasses)

  769.                     continue;

  770.                 // zerobits information

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

  772.                 // number of passes

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

  774. 

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

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

  777.                 if (llen < 0){

  778.                     pad = -llen;

  779.                     llen = 0;

  780.                 }

  781.                 // length of code block

  782.                 put_bits(s, 1, llen);

  783.                 put_bits(s, 0, 1);

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

  785.             }

  786.         }

  787.     }

  788.     j2k_flush(s);

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

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

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

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

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

  794.             int xi;

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

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

  797.                 if (cblk->ninclpasses){

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

  799.                         return -1;

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

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

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

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

  804.                 }

  805.             }

  806.         }

  807.     }

  808.     return 0;

  809. }

  810. 

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

  812. {

  813.     int compno, reslevelno, ret;

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

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

  816. 

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

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

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

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

  821.             int precno;

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

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

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

  825.                               qntsty->nguardbits)) < 0)

  826.                     return ret;

  827.             }

  828.         }

  829.     }

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

  831.     return 0;

  832. }

  833. 

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

  835. {

  836.     int passno, res = 0;

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

  838.         int dr;

  839.         int64_t dd;

  840. 

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

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

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

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

  845. 

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

  847.             res = passno+1;

  848.     }

  849.     return res;

  850. }

  851. 

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

  853. {

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

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

  856. 

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

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

  859. 

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

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

  862. 

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

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

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

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

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

  868. 

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

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

  871. 

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

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

  874.                     }

  875.                 }

  876.             }

  877.         }

  878.     }

  879. }

  880. 

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

  882. {

  883.     int compno, reslevelno, bandno, ret;

  884.     Jpeg2000T1Context t1;

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

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

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

  888. 

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

  890. 

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

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

  893.             return ret;

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

  895. 

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

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

  898. 

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

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

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

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

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

  904.                 y0 = yy0;

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

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

  907. 

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

  909.                     continue;

  910. 

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

  912. 

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

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

  915.                         xx0 = 0;

  916.                     else

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

  918.                     x0 = xx0;

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

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

  921. 

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

  923.                         int y, x;

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

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

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

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

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

  929.                                 }

  930.                             }

  931.                         } else{

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

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

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

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

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

  937.                                     ptr++;

  938.                                 }

  939.                             }

  940.                         }

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

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

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

  944.                             return AVERROR(ENOMEM);

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

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

  947.                         xx0 = xx1;

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

  949.                     }

  950.                     yy0 = yy1;

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

  952.                 }

  953.             }

  954.         }

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

  956.     }

  957. 

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

  959.     truncpasses(s, tile);

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

  961.         return ret;

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

  963.     return 0;

  964. }

  965. 

  966. static void cleanup(Jpeg2000EncoderContext *s)

  967. {

  968.     int tileno, compno;

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

  970. 

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

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

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

  974.             ff_jpeg2000_cleanup(comp, codsty);

  975.         }

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

  977.     }

  978.     av_freep(&s->tile);

  979. }

  980. 

  981. static void reinit(Jpeg2000EncoderContext *s)

  982. {

  983.     int tileno, compno;

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

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

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

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

  988.     }

  989. }

  990. 

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

  992. {

  993.     AV_WB32(size, end-size);

  994. }

  995. 

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

  997.                         const AVFrame *pict, int *got_packet)

  998. {

  999.     int tileno, ret;

  1000.     Jpeg2000EncoderContext *s = avctx->priv_data;

  1001.     uint8_t *chunkstart, *jp2cstart, *jp2hstart;

  1002. 

  1003.     if ((ret = ff_alloc_packet2(avctx, pkt, avctx->width*avctx->height*9 + AV_INPUT_BUFFER_MIN_SIZE, 0)) < 0)

  1004.         return ret;

  1005. 

  1006.     // init:

  1007.     s->buf = s->buf_start = pkt->data;

  1008.     s->buf_end = pkt->data + pkt->size;

  1009. 

  1010.     s->picture = pict;

  1011. 

  1012.     s->lambda = s->picture->quality * LAMBDA_SCALE;

  1013. 

  1014.     copy_frame(s);

  1015.     reinit(s);

  1016. 

  1017.     if (s->format == CODEC_JP2) {

  1018.         av_assert0(s->buf == pkt->data);

  1019. 

  1020.         bytestream_put_be32(&s->buf, 0x0000000C);

  1021.         bytestream_put_be32(&s->buf, 0x6A502020);

  1022.         bytestream_put_be32(&s->buf, 0x0D0A870A);

  1023. 

  1024.         chunkstart = s->buf;

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

  1026.         bytestream_put_buffer(&s->buf, "ftyp", 4);

  1027.         bytestream_put_buffer(&s->buf, "jp2\040\040", 4);

  1028.         bytestream_put_be32(&s->buf, 0);

  1029.         bytestream_put_buffer(&s->buf, "jp2\040", 4);

  1030.         update_size(chunkstart, s->buf);

  1031. 

  1032.         jp2hstart = s->buf;

  1033.         bytestream_put_be32(&s->buf, 0);

  1034.         bytestream_put_buffer(&s->buf, "jp2h", 4);

  1035. 

  1036.         chunkstart = s->buf;

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

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

  1039.         bytestream_put_be32(&s->buf, avctx->height);

  1040.         bytestream_put_be32(&s->buf, avctx->width);

  1041.         bytestream_put_be16(&s->buf, s->ncomponents);

  1042.         bytestream_put_byte(&s->buf, s->cbps[0]);

  1043.         bytestream_put_byte(&s->buf, 7);

  1044.         bytestream_put_byte(&s->buf, 0);

  1045.         bytestream_put_byte(&s->buf, 0);

  1046.         update_size(chunkstart, s->buf);

  1047. 

  1048.         chunkstart = s->buf;

  1049.         bytestream_put_be32(&s->buf, 0);

  1050.         bytestream_put_buffer(&s->buf, "colr", 4);

  1051.         bytestream_put_byte(&s->buf, 1);

  1052.         bytestream_put_byte(&s->buf, 0);

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

  1054.         if (s->ncomponents == 1) {

  1055.             bytestream_put_be32(&s->buf, 17);

  1056.         } else if (avctx->pix_fmt == AV_PIX_FMT_RGB24) {

  1057.             bytestream_put_be32(&s->buf, 16);

  1058.         } else {

  1059.             bytestream_put_be32(&s->buf, 18);

  1060.         }

  1061.         update_size(chunkstart, s->buf);

  1062.         update_size(jp2hstart, s->buf);

  1063. 

  1064.         jp2cstart = s->buf;

  1065.         bytestream_put_be32(&s->buf, 0);

  1066.         bytestream_put_buffer(&s->buf, "jp2c", 4);

  1067.     }

  1068. 

  1069.     if (s->buf_end - s->buf < 2)

  1070.         return -1;

  1071.     bytestream_put_be16(&s->buf, JPEG2000_SOC);

  1072.     if ((ret = put_siz(s)) < 0)

  1073.         return ret;

  1074.     if ((ret = put_cod(s)) < 0)

  1075.         return ret;

  1076.     if ((ret = put_qcd(s, 0)) < 0)

  1077.         return ret;

  1078.     if ((ret = put_com(s, 0)) < 0)

  1079.         return ret;

  1080. 

  1081.     for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++){

  1082.         uint8_t *psotptr;

  1083.         if (!(psotptr = put_sot(s, tileno)))

  1084.             return -1;

  1085.         if (s->buf_end - s->buf < 2)

  1086.             return -1;

  1087.         bytestream_put_be16(&s->buf, JPEG2000_SOD);

  1088.         if ((ret = encode_tile(s, s->tile + tileno, tileno)) < 0)

  1089.             return ret;

  1090.         bytestream_put_be32(&psotptr, s->buf - psotptr + 6);

  1091.     }

  1092.     if (s->buf_end - s->buf < 2)

  1093.         return -1;

  1094.     bytestream_put_be16(&s->buf, JPEG2000_EOC);

  1095. 

  1096.     if (s->format == CODEC_JP2)

  1097.         update_size(jp2cstart, s->buf);

  1098. 

  1099.     av_log(s->avctx, AV_LOG_DEBUG, "end\n");

  1100.     pkt->size = s->buf - s->buf_start;

  1101.     pkt->flags |= AV_PKT_FLAG_KEY;

  1102.     *got_packet = 1;

  1103. 

  1104.     return 0;

  1105. }

  1106. 

  1107. static av_cold int j2kenc_init(AVCodecContext *avctx)

  1108. {

  1109.     int i, ret;

  1110.     Jpeg2000EncoderContext *s = avctx->priv_data;

  1111.     Jpeg2000CodingStyle *codsty = &s->codsty;

  1112.     Jpeg2000QuantStyle  *qntsty = &s->qntsty;

  1113. 

  1114.     s->avctx = avctx;

  1115.     av_log(s->avctx, AV_LOG_DEBUG, "init\n");

  1116. 

  1117. #if FF_API_PRIVATE_OPT

  1118. FF_DISABLE_DEPRECATION_WARNINGS

  1119.     if (avctx->prediction_method)

  1120.         s->pred = avctx->prediction_method;

  1121. FF_ENABLE_DEPRECATION_WARNINGS

  1122. #endif

  1123. 

  1124.     // defaults:

  1125.     // TODO: implement setting non-standard precinct size

  1126.     memset(codsty->log2_prec_widths , 15, sizeof(codsty->log2_prec_widths ));

  1127.     memset(codsty->log2_prec_heights, 15, sizeof(codsty->log2_prec_heights));

  1128.     codsty->nreslevels2decode=

  1129.     codsty->nreslevels       = 7;

  1130.     codsty->log2_cblk_width  = 4;

  1131.     codsty->log2_cblk_height = 4;

  1132.     codsty->transform        = s->pred ? FF_DWT53 : FF_DWT97_INT;

  1133. 

  1134.     qntsty->nguardbits       = 1;

  1135. 

  1136.     if ((s->tile_width  & (s->tile_width -1)) ||

  1137.         (s->tile_height & (s->tile_height-1))) {

  1138.         av_log(avctx, AV_LOG_WARNING, "Tile dimension not a power of 2\n");

  1139.     }

  1140. 

  1141.     if (codsty->transform == FF_DWT53)

  1142.         qntsty->quantsty = JPEG2000_QSTY_NONE;

  1143.     else

  1144.         qntsty->quantsty = JPEG2000_QSTY_SE;

  1145. 

  1146.     s->width = avctx->width;

  1147.     s->height = avctx->height;

  1148. 

  1149.     for (i = 0; i < 3; i++)

  1150.         s->cbps[i] = 8;

  1151. 

  1152.     if (avctx->pix_fmt == AV_PIX_FMT_RGB24){

  1153.         s->ncomponents = 3;

  1154.     } else if (avctx->pix_fmt == AV_PIX_FMT_GRAY8){

  1155.         s->ncomponents = 1;

  1156.     } else{ // planar YUV

  1157.         s->planar = 1;

  1158.         s->ncomponents = 3;

  1159.         ret = av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt,

  1160.                                                s->chroma_shift, s->chroma_shift + 1);

  1161.         if (ret)

  1162.             return ret;

  1163.     }

  1164. 

  1165.     ff_jpeg2000_init_tier1_luts();

  1166.     ff_mqc_init_context_tables();

  1167.     init_luts();

  1168. 

  1169.     init_quantization(s);

  1170.     if ((ret=init_tiles(s)) < 0)

  1171.         return ret;

  1172. 

  1173.     av_log(s->avctx, AV_LOG_DEBUG, "after init\n");

  1174. 

  1175.     return 0;

  1176. }

  1177. 

  1178. static int j2kenc_destroy(AVCodecContext *avctx)

  1179. {

  1180.     Jpeg2000EncoderContext *s = avctx->priv_data;

  1181. 

  1182.     cleanup(s);

  1183.     return 0;

  1184. }

  1185. 

  1186. // taken from the libopenjpeg wraper so it matches

  1187. 

  1188. #define OFFSET(x) offsetof(Jpeg2000EncoderContext, x)

  1189. #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

  1190. static const AVOption options[] = {

  1191.     { "format",        "Codec Format",      OFFSET(format),        AV_OPT_TYPE_INT,   { .i64 = CODEC_JP2   }, CODEC_J2K, CODEC_JP2,   VE, "format"      },

  1192.     { "j2k",           NULL,                0,                     AV_OPT_TYPE_CONST, { .i64 = CODEC_J2K   }, 0,         0,           VE, "format"      },

  1193.     { "jp2",           NULL,                0,                     AV_OPT_TYPE_CONST, { .i64 = CODEC_JP2   }, 0,         0,           VE, "format"      },

  1194.     { "tile_width",    "Tile Width",        OFFSET(tile_width),    AV_OPT_TYPE_INT,   { .i64 = 256         }, 1,     1<<30,           VE, },

  1195.     { "tile_height",   "Tile Height",       OFFSET(tile_height),   AV_OPT_TYPE_INT,   { .i64 = 256         }, 1,     1<<30,           VE, },

  1196.     { "pred",          "DWT Type",          OFFSET(pred),          AV_OPT_TYPE_INT,   { .i64 = 0           }, 0,         1,           VE, "pred"        },

  1197.     { "dwt97int",      NULL,                0,                     AV_OPT_TYPE_CONST, { .i64 = 0           }, INT_MIN, INT_MAX,       VE, "pred"        },

  1198.     { "dwt53",         NULL,                0,                     AV_OPT_TYPE_CONST, { .i64 = 0           }, INT_MIN, INT_MAX,       VE, "pred"        },

  1199. 

  1200.     { NULL }

  1201. };

  1202. 

  1203. static const AVClass j2k_class = {

  1204.     .class_name = "jpeg 2000 encoder",

  1205.     .item_name  = av_default_item_name,

  1206.     .option     = options,

  1207.     .version    = LIBAVUTIL_VERSION_INT,

  1208. };

  1209. 

  1210. AVCodec ff_jpeg2000_encoder = {

  1211.     .name           = "jpeg2000",

  1212.     .long_name      = NULL_IF_CONFIG_SMALL("JPEG 2000"),

  1213.     .type           = AVMEDIA_TYPE_VIDEO,

  1214.     .id             = AV_CODEC_ID_JPEG2000,

  1215.     .priv_data_size = sizeof(Jpeg2000EncoderContext),

  1216.     .init           = j2kenc_init,

  1217.     .encode2        = encode_frame,

  1218.     .close          = j2kenc_destroy,

  1219.     .pix_fmts       = (const enum AVPixelFormat[]) {

  1220.         AV_PIX_FMT_RGB24, AV_PIX_FMT_YUV444P, AV_PIX_FMT_GRAY8,

  1221.         AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,

  1222.         AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,

  1223.         AV_PIX_FMT_NONE

  1224.     },

  1225.     .priv_class     = &j2k_class,

  1226. };