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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.     int sop;

  133.     int eph;

  134. } Jpeg2000EncoderContext;

  135. 

  136. 

  137. /* debug */

  138. #if 0

  139. #undef ifprintf

  140. #undef printf

  141. 

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

  143. {

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

  145. }

  146. 

  147. static void printcomp(Jpeg2000Component *comp)

  148. {

  149.     int i;

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

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

  152. }

  153. 

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

  155. {

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

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

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

  159.                 "tiles:\n",

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

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

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

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

  164.         nspaces(fd, 2);

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

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

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

  168.             nspaces(fd, 4);

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

  170.             nspaces(fd, 4);

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

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

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

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

  175.                 nspaces(fd, 6);

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

  177.                 nspaces(fd, 6);

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

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

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

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

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

  183.                     nspaces(fd, 8);

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

  185.                     nspaces(fd, 8);

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

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

  188.                                 band->x0, band->x1,

  189.                                 band->y0, band->y1,

  190.                                 band->codeblock_width, band->codeblock_height,

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

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

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

  194.                         nspaces(fd, 10);

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

  196.                         nspaces(fd, 10);

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

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

  199.                     }

  200.                 }

  201.             }

  202.         }

  203.     }

  204. }

  205. #endif

  206. 

  207. /* bitstream routines */

  208. 

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

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

  211. {

  212.     while (n-- > 0){

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

  214.         {

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

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

  217.         }

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

  219.     }

  220. }

  221. 

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

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

  224. {

  225.     while(--n >= 0)

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

  227. }

  228. 

  229. /** flush the bitstream */

  230. static void j2k_flush(Jpeg2000EncoderContext *s)

  231. {

  232.     if (s->bit_index){

  233.         s->bit_index = 0;

  234.         s->buf++;

  235.     }

  236. }

  237. 

  238. /* tag tree routines */

  239. 

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

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

  242. {

  243.     Jpeg2000TgtNode *stack[30];

  244.     int sp = 1, curval = 0;

  245.     stack[0] = node;

  246. 

  247.     node = node->parent;

  248.     while(node){

  249.         if (node->vis){

  250.             curval = node->val;

  251.             break;

  252.         }

  253.         node->vis++;

  254.         stack[sp++] = node;

  255.         node = node->parent;

  256.     }

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

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

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

  260.             break;

  261.         }

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

  263.         put_bits(s, 1, 1);

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

  265.     }

  266. }

  267. 

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

  269. static void tag_tree_update(Jpeg2000TgtNode *node)

  270. {

  271.     int lev = 0;

  272.     while (node->parent){

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

  274.             break;

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

  276.         node = node->parent;

  277.         lev++;

  278.     }

  279. }

  280. 

  281. static int put_siz(Jpeg2000EncoderContext *s)

  282. {

  283.     int i;

  284. 

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

  286.         return -1;

  287. 

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

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

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

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

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

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

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

  295. 

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

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

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

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

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

  301. 

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

  303.         bytestream_put_byte(&s->buf, s->cbps[i] - 1);

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

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

  306.     }

  307.     return 0;

  308. }

  309. 

  310. static int put_cod(Jpeg2000EncoderContext *s)

  311. {

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

  313.     uint8_t scod = 0;

  314. 

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

  316.         return -1;

  317. 

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

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

  320.     if (s->sop)

  321.         scod |= JPEG2000_CSTY_SOP;

  322.     if (s->eph)

  323.         scod |= JPEG2000_CSTY_EPH;

  324.     bytestream_put_byte(&s->buf, scod);  // Scod

  325.     // SGcod

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

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

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

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

  330.     }else{

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

  332.     }

  333.     // SPcod

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

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

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

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

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

  339.     return 0;

  340. }

  341. 

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

  343. {

  344.     int i, size;

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

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

  347. 

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

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

  350.     else // QSTY_SE

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

  352. 

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

  354.         return -1;

  355. 

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

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

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

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

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

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

  362.     else // QSTY_SE

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

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

  365.     return 0;

  366. }

  367. 

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

  369. {

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

  371. 

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

  373.         return 0;

  374. 

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

  376.         return -1;

  377. 

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

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

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

  381. 

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

  383. 

  384.     return 0;

  385. }

  386. 

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

  388. {

  389.     uint8_t *psotptr;

  390. 

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

  392.         return NULL;

  393. 

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

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

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

  397. 

  398.     psotptr = s->buf;

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

  400. 

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

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

  403.     return psotptr;

  404. }

  405. 

  406. /**

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

  408.  * allocate memory for them

  409.  * divide the input image into tile-components

  410.  */

  411. static int init_tiles(Jpeg2000EncoderContext *s)

  412. {

  413.     int tileno, tilex, tiley, compno;

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

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

  416. 

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

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

  419. 

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

  421.     if (!s->tile)

  422.         return AVERROR(ENOMEM);

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

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

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

  426. 

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

  428.             if (!tile->comp)

  429.                 return AVERROR(ENOMEM);

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

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

  432.                 int ret, i, j;

  433. 

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

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

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

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

  438.                 if (compno > 0)

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

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

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

  442. 

  443.                 if ((ret = ff_jpeg2000_init_component(comp,

  444.                                                 codsty,

  445.                                                 qntsty,

  446.                                                 s->cbps[compno],

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

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

  449.                                                 s->avctx

  450.                                                )) < 0)

  451.                     return ret;

  452.             }

  453.         }

  454.     return 0;

  455. }

  456. 

  457. #define COPY_FRAME(D, PIXEL)                                                                                                \

  458.     static void copy_frame_ ##D(Jpeg2000EncoderContext *s)                                                                  \

  459.     {                                                                                                                       \

  460.         int tileno, compno, i, y, x;                                                                                        \

  461.         PIXEL *line;                                                                                                        \

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

  463.             Jpeg2000Tile *tile = s->tile + tileno;                                                                          \

  464.             if (s->planar){                                                                                                 \

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

  466.                     Jpeg2000Component *comp = tile->comp + compno;                                                          \

  467.                     int *dst = comp->i_data;                                                                                \

  468.                     int cbps = s->cbps[compno];                                                                             \

  469.                     line = (PIXEL*)s->picture->data[compno]                                                                 \

  470.                            + comp->coord[1][0] * (s->picture->linesize[compno] / sizeof(PIXEL))                             \

  471.                            + comp->coord[0][0];                                                                             \

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

  473.                         PIXEL *ptr = line;                                                                                  \

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

  475.                             *dst++ = *ptr++ - (1 << (cbps - 1));                                                            \

  476.                         line += s->picture->linesize[compno] / sizeof(PIXEL);                                               \

  477.                     }                                                                                                       \

  478.                 }                                                                                                           \

  479.             } else{                                                                                                         \

  480.                 line = (PIXEL*)s->picture->data[0] + tile->comp[0].coord[1][0] * (s->picture->linesize[0] / sizeof(PIXEL))  \

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

  482.                                                                                                                             \

  483.                 i = 0;                                                                                                      \

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

  485.                     PIXEL *ptr = line;                                                                                      \

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

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

  488.                             int cbps = s->cbps[compno];                                                                     \

  489.                             tile->comp[compno].i_data[i] = *ptr++  - (1 << (cbps - 1));                                     \

  490.                         }                                                                                                   \

  491.                     }                                                                                                       \

  492.                     line += s->picture->linesize[0] / sizeof(PIXEL);                                                        \

  493.                 }                                                                                                           \

  494.             }                                                                                                               \

  495.         }                                                                                                                   \

  496.     }

  497. 

  498. COPY_FRAME(8, uint8_t)

  499. COPY_FRAME(16, uint16_t)

  500. 

  501. static void init_quantization(Jpeg2000EncoderContext *s)

  502. {

  503.     int compno, reslevelno, bandno;

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

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

  506. 

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

  508.         int gbandno = 0;

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

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

  511.             nbands = reslevelno ? 3 : 1;

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

  513.                 int expn, mant = 0;

  514. 

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

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

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

  518.                         log = av_log2(ss);

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

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

  521.                 } else

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

  523. 

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

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

  526.             }

  527.         }

  528.     }

  529. }

  530. 

  531. static void init_luts(void)

  532. {

  533.     int i, a,

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

  535. 

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

  537.         lut_nmsedec_sig[i]  = FFMAX((3 * i << (13 - NMSEDEC_FRACBITS)) - (9 << 11), 0);

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

  539. 

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

  541.         lut_nmsedec_ref[i]  = FFMAX((a - 2) * (i << (13 - NMSEDEC_FRACBITS)) +

  542.                                     (1 << 13) - (a * a << 11), 0);

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

  544.                                     << 1, 0);

  545.     }

  546. }

  547. 

  548. /* tier-1 routines */

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

  550. {

  551.     if (bpno > NMSEDEC_FRACBITS)

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

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

  554. }

  555. 

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

  557. {

  558.     if (bpno > NMSEDEC_FRACBITS)

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

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

  561. }

  562. 

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

  564. {

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

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

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

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

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

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

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

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

  573.                     if (bit){

  574.                         int xorbit;

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

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

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

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

  579.                     }

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

  581.                 }

  582.             }

  583. }

  584. 

  585. static void encode_refpass(Jpeg2000T1Context *t1, int width, int height, 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.             for (y = y0; y < height && y < y0+4; y++)

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

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

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

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

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

  596.                 }

  597. }

  598. 

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

  600. {

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

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

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

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

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

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

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

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

  609.             {

  610.                 // aggregation mode

  611.                 int rlen;

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

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

  614.                         break;

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

  616.                 if (rlen == 4)

  617.                     continue;

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

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

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

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

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

  623.                         if (y > y0 + rlen)

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

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

  626.                             int xorbit;

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

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

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

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

  631.                         }

  632.                     }

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

  634.                 }

  635.             } else{

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

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

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

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

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

  641.                             int xorbit;

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

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

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

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

  646.                         }

  647.                     }

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

  649.                 }

  650.             }

  651.         }

  652. }

  653. 

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

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

  656. {

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

  658.     int64_t wmsedec = 0;

  659. 

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

  661. 

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

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

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

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

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

  667.             }

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

  669.         }

  670.     }

  671. 

  672.     if (max == 0){

  673.         cblk->nonzerobits = 0;

  674.         bpno = 0;

  675.     } else{

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

  677.         bpno = cblk->nonzerobits - 1;

  678.     }

  679. 

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

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

  682. 

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

  684.         nmsedec=0;

  685. 

  686.         switch(pass_t){

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

  688.                     break;

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

  690.                     break;

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

  692.                     break;

  693.         }

  694. 

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

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

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

  698. 

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

  700.             pass_t = 0;

  701.             bpno--;

  702.         }

  703.     }

  704.     cblk->npasses = passno;

  705.     cblk->ninclpasses = passno;

  706. 

  707.     if (passno)

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

  709. }

  710. 

  711. /* tier-2 routines: */

  712. 

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

  714. {

  715.     if (n == 1)

  716.         put_num(s, 0, 1);

  717.     else if (n == 2)

  718.         put_num(s, 2, 2);

  719.     else if (n <= 5)

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

  721.     else if (n <= 36)

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

  723.     else

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

  725. }

  726. 

  727. 

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

  729.                           uint8_t *expn, int numgbits, int packetno)

  730. {

  731.     int bandno, empty = 1;

  732.     // init bitstream

  733.     *s->buf = 0;

  734.     s->bit_index = 0;

  735. 

  736.     if (s->sop) {

  737.         bytestream_put_be16(&s->buf, JPEG2000_SOP);

  738.         bytestream_put_be16(&s->buf, 4);

  739.         bytestream_put_be16(&s->buf, packetno);

  740.     }

  741.     // header

  742. 

  743.     // is the packet empty?

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

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

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

  747.             empty = 0;

  748.             break;

  749.         }

  750.     }

  751. 

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

  753.     if (empty){

  754.         j2k_flush(s);

  755.         return 0;

  756.     }

  757. 

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

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

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

  761.         int yi, xi, pos;

  762.         int cblknw = prec->nb_codeblocks_width;

  763. 

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

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

  766.             continue;

  767. 

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

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

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

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

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

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

  774.             }

  775.         }

  776. 

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

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

  779.                 int pad = 0, llen, length;

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

  781. 

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

  783.                     return -1;

  784. 

  785.                 // inclusion information

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

  787.                 if (!cblk->ninclpasses)

  788.                     continue;

  789.                 // zerobits information

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

  791.                 // number of passes

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

  793. 

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

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

  796.                 if (llen < 0){

  797.                     pad = -llen;

  798.                     llen = 0;

  799.                 }

  800.                 // length of code block

  801.                 put_bits(s, 1, llen);

  802.                 put_bits(s, 0, 1);

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

  804.             }

  805.         }

  806.     }

  807.     j2k_flush(s);

  808.     if (s->eph) {

  809.         bytestream_put_be16(&s->buf, JPEG2000_EPH);

  810.     }

  811. 

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

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

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

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

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

  817.             int xi;

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

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

  820.                 if (cblk->ninclpasses){

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

  822.                         return -1;

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

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

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

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

  827.                 }

  828.             }

  829.         }

  830.     }

  831.     return 0;

  832. }

  833. 

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

  835. {

  836.     int compno, reslevelno, ret;

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

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

  839.     int packetno = 0;

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

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

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

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

  844.             int precno;

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

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

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

  848.                               qntsty->nguardbits, packetno++)) < 0)

  849.                     return ret;

  850.             }

  851.         }

  852.     }

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

  854.     return 0;

  855. }

  856. 

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

  858. {

  859.     int passno, res = 0;

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

  861.         int dr;

  862.         int64_t dd;

  863. 

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

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

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

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

  868. 

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

  870.             res = passno+1;

  871.     }

  872.     return res;

  873. }

  874. 

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

  876. {

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

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

  879. 

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

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

  882. 

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

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

  885. 

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

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

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

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

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

  891. 

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

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

  894. 

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

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

  897.                     }

  898.                 }

  899.             }

  900.         }

  901.     }

  902. }

  903. 

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

  905. {

  906.     int compno, reslevelno, bandno, ret;

  907.     Jpeg2000T1Context t1;

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

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

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

  911. 

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

  913. 

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

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

  916.             return ret;

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

  918. 

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

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

  921. 

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

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

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

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

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

  927.                 y0 = yy0;

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

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

  930. 

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

  932.                     continue;

  933. 

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

  935. 

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

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

  938.                         xx0 = 0;

  939.                     else

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

  941.                     x0 = xx0;

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

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

  944. 

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

  946.                         int y, x;

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

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

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

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

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

  952.                                 }

  953.                             }

  954.                         } else{

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

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

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

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

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

  960.                                     ptr++;

  961.                                 }

  962.                             }

  963.                         }

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

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

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

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

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

  969.                             return AVERROR(ENOMEM);

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

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

  972.                         xx0 = xx1;

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

  974.                     }

  975.                     yy0 = yy1;

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

  977.                 }

  978.             }

  979.         }

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

  981.     }

  982. 

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

  984.     truncpasses(s, tile);

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

  986.         return ret;

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

  988.     return 0;

  989. }

  990. 

  991. static void cleanup(Jpeg2000EncoderContext *s)

  992. {

  993.     int tileno, compno;

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

  995. 

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

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

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

  999.             ff_jpeg2000_cleanup(comp, codsty);

  1000.         }

  1001.         av_freep(&s->tile[tileno].comp);

  1002.     }

  1003.     av_freep(&s->tile);

  1004. }

  1005. 

  1006. static void reinit(Jpeg2000EncoderContext *s)

  1007. {

  1008.     int tileno, compno;

  1009.     for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++){

  1010.         Jpeg2000Tile *tile = s->tile + tileno;

  1011.         for (compno = 0; compno < s->ncomponents; compno++)

  1012.             ff_jpeg2000_reinit(tile->comp + compno, &s->codsty);

  1013.     }

  1014. }

  1015. 

  1016. static void update_size(uint8_t *size, const uint8_t *end)

  1017. {

  1018.     AV_WB32(size, end-size);

  1019. }

  1020. 

  1021. static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,

  1022.                         const AVFrame *pict, int *got_packet)

  1023. {

  1024.     int tileno, ret;

  1025.     Jpeg2000EncoderContext *s = avctx->priv_data;

  1026.     uint8_t *chunkstart, *jp2cstart, *jp2hstart;

  1027. 

  1028.     if ((ret = ff_alloc_packet2(avctx, pkt, avctx->width*avctx->height*9 + AV_INPUT_BUFFER_MIN_SIZE, 0)) < 0)

  1029.         return ret;

  1030. 

  1031.     // init:

  1032.     s->buf = s->buf_start = pkt->data;

  1033.     s->buf_end = pkt->data + pkt->size;

  1034. 

  1035.     s->picture = pict;

  1036. 

  1037.     s->lambda = s->picture->quality * LAMBDA_SCALE;

  1038. 

  1039.     if (avctx->pix_fmt == AV_PIX_FMT_BGR48 || avctx->pix_fmt == AV_PIX_FMT_GRAY16)

  1040.         copy_frame_16(s);

  1041.     else

  1042.         copy_frame_8(s);

  1043. 

  1044.     reinit(s);

  1045. 

  1046.     if (s->format == CODEC_JP2) {

  1047.         av_assert0(s->buf == pkt->data);

  1048. 

  1049.         bytestream_put_be32(&s->buf, 0x0000000C);

  1050.         bytestream_put_be32(&s->buf, 0x6A502020);

  1051.         bytestream_put_be32(&s->buf, 0x0D0A870A);

  1052. 

  1053.         chunkstart = s->buf;

  1054.         bytestream_put_be32(&s->buf, 0);

  1055.         bytestream_put_buffer(&s->buf, "ftyp", 4);

  1056.         bytestream_put_buffer(&s->buf, "jp2\040\040", 4);

  1057.         bytestream_put_be32(&s->buf, 0);

  1058.         bytestream_put_buffer(&s->buf, "jp2\040", 4);

  1059.         update_size(chunkstart, s->buf);

  1060. 

  1061.         jp2hstart = s->buf;

  1062.         bytestream_put_be32(&s->buf, 0);

  1063.         bytestream_put_buffer(&s->buf, "jp2h", 4);

  1064. 

  1065.         chunkstart = s->buf;

  1066.         bytestream_put_be32(&s->buf, 0);

  1067.         bytestream_put_buffer(&s->buf, "ihdr", 4);

  1068.         bytestream_put_be32(&s->buf, avctx->height);

  1069.         bytestream_put_be32(&s->buf, avctx->width);

  1070.         bytestream_put_be16(&s->buf, s->ncomponents);

  1071.         bytestream_put_byte(&s->buf, s->cbps[0]);

  1072.         bytestream_put_byte(&s->buf, 7);

  1073.         bytestream_put_byte(&s->buf, 0);

  1074.         bytestream_put_byte(&s->buf, 0);

  1075.         update_size(chunkstart, s->buf);

  1076. 

  1077.         chunkstart = s->buf;

  1078.         bytestream_put_be32(&s->buf, 0);

  1079.         bytestream_put_buffer(&s->buf, "colr", 4);

  1080.         bytestream_put_byte(&s->buf, 1);

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

  1082.         bytestream_put_byte(&s->buf, 0);

  1083.         if (avctx->pix_fmt == AV_PIX_FMT_RGB24 || avctx->pix_fmt == AV_PIX_FMT_PAL8) {

  1084.             bytestream_put_be32(&s->buf, 16);

  1085.         } else if (s->ncomponents == 1) {

  1086.             bytestream_put_be32(&s->buf, 17);

  1087.         } else {

  1088.             bytestream_put_be32(&s->buf, 18);

  1089.         }

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

  1091.         if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {

  1092.             int i;

  1093.             uint8_t *palette = pict->data[1];

  1094.             chunkstart = s->buf;

  1095.             bytestream_put_be32(&s->buf, 0);

  1096.             bytestream_put_buffer(&s->buf, "pclr", 4);

  1097.             bytestream_put_be16(&s->buf, AVPALETTE_COUNT);

  1098.             bytestream_put_byte(&s->buf, 3); // colour channels

  1099.             bytestream_put_be24(&s->buf, 0x070707); //colour depths

  1100.             for (i = 0; i < AVPALETTE_COUNT; i++) {

  1101.                 bytestream_put_be24(&s->buf, HAVE_BIGENDIAN ? AV_RB24(palette + 1) : AV_RL24(palette));

  1102.                 palette += 4;

  1103.             }

  1104.             update_size(chunkstart, s->buf);

  1105.             chunkstart = s->buf;

  1106.             bytestream_put_be32(&s->buf, 0);

  1107.             bytestream_put_buffer(&s->buf, "cmap", 4);

  1108.             for (i = 0; i < 3; i++) {

  1109.                 bytestream_put_be16(&s->buf, 0); // component

  1110.                 bytestream_put_byte(&s->buf, 1); // palette mapping

  1111.                 bytestream_put_byte(&s->buf, i); // index

  1112.             }

  1113.             update_size(chunkstart, s->buf);

  1114.         }

  1115.         update_size(jp2hstart, s->buf);

  1116. 

  1117.         jp2cstart = s->buf;

  1118.         bytestream_put_be32(&s->buf, 0);

  1119.         bytestream_put_buffer(&s->buf, "jp2c", 4);

  1120.     }

  1121. 

  1122.     if (s->buf_end - s->buf < 2)

  1123.         return -1;

  1124.     bytestream_put_be16(&s->buf, JPEG2000_SOC);

  1125.     if ((ret = put_siz(s)) < 0)

  1126.         return ret;

  1127.     if ((ret = put_cod(s)) < 0)

  1128.         return ret;

  1129.     if ((ret = put_qcd(s, 0)) < 0)

  1130.         return ret;

  1131.     if ((ret = put_com(s, 0)) < 0)

  1132.         return ret;

  1133. 

  1134.     for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++){

  1135.         uint8_t *psotptr;

  1136.         if (!(psotptr = put_sot(s, tileno)))

  1137.             return -1;

  1138.         if (s->buf_end - s->buf < 2)

  1139.             return -1;

  1140.         bytestream_put_be16(&s->buf, JPEG2000_SOD);

  1141.         if ((ret = encode_tile(s, s->tile + tileno, tileno)) < 0)

  1142.             return ret;

  1143.         bytestream_put_be32(&psotptr, s->buf - psotptr + 6);

  1144.     }

  1145.     if (s->buf_end - s->buf < 2)

  1146.         return -1;

  1147.     bytestream_put_be16(&s->buf, JPEG2000_EOC);

  1148. 

  1149.     if (s->format == CODEC_JP2)

  1150.         update_size(jp2cstart, s->buf);

  1151. 

  1152.     av_log(s->avctx, AV_LOG_DEBUG, "end\n");

  1153.     pkt->size = s->buf - s->buf_start;

  1154.     pkt->flags |= AV_PKT_FLAG_KEY;

  1155.     *got_packet = 1;

  1156. 

  1157.     return 0;

  1158. }

  1159. 

  1160. static av_cold int j2kenc_init(AVCodecContext *avctx)

  1161. {

  1162.     int i, ret;

  1163.     Jpeg2000EncoderContext *s = avctx->priv_data;

  1164.     Jpeg2000CodingStyle *codsty = &s->codsty;

  1165.     Jpeg2000QuantStyle  *qntsty = &s->qntsty;

  1166. 

  1167.     s->avctx = avctx;

  1168.     av_log(s->avctx, AV_LOG_DEBUG, "init\n");

  1169. 

  1170. #if FF_API_PRIVATE_OPT

  1171. FF_DISABLE_DEPRECATION_WARNINGS

  1172.     if (avctx->prediction_method)

  1173.         s->pred = avctx->prediction_method;

  1174. FF_ENABLE_DEPRECATION_WARNINGS

  1175. #endif

  1176. 

  1177.     if (avctx->pix_fmt == AV_PIX_FMT_PAL8 && (s->pred != FF_DWT97_INT || s->format != CODEC_JP2)) {

  1178.         av_log(s->avctx, AV_LOG_WARNING, "Forcing lossless jp2 for pal8\n");

  1179.         s->pred = FF_DWT97_INT;

  1180.         s->format = CODEC_JP2;

  1181.     }

  1182. 

  1183.     // defaults:

  1184.     // TODO: implement setting non-standard precinct size

  1185.     memset(codsty->log2_prec_widths , 15, sizeof(codsty->log2_prec_widths ));

  1186.     memset(codsty->log2_prec_heights, 15, sizeof(codsty->log2_prec_heights));

  1187.     codsty->nreslevels2decode=

  1188.     codsty->nreslevels       = 7;

  1189.     codsty->log2_cblk_width  = 4;

  1190.     codsty->log2_cblk_height = 4;

  1191.     codsty->transform        = s->pred ? FF_DWT53 : FF_DWT97_INT;

  1192. 

  1193.     qntsty->nguardbits       = 1;

  1194. 

  1195.     if ((s->tile_width  & (s->tile_width -1)) ||

  1196.         (s->tile_height & (s->tile_height-1))) {

  1197.         av_log(avctx, AV_LOG_WARNING, "Tile dimension not a power of 2\n");

  1198.     }

  1199. 

  1200.     if (codsty->transform == FF_DWT53)

  1201.         qntsty->quantsty = JPEG2000_QSTY_NONE;

  1202.     else

  1203.         qntsty->quantsty = JPEG2000_QSTY_SE;

  1204. 

  1205.     s->width = avctx->width;

  1206.     s->height = avctx->height;

  1207. 

  1208.     for (i = 0; i < 3; i++) {

  1209.         if (avctx->pix_fmt == AV_PIX_FMT_GRAY16 || avctx->pix_fmt == AV_PIX_FMT_RGB48)

  1210.             s->cbps[i] = 16;

  1211.         else

  1212.             s->cbps[i] = 8;

  1213.     }

  1214. 

  1215.     if (avctx->pix_fmt == AV_PIX_FMT_RGB24 || avctx->pix_fmt == AV_PIX_FMT_RGB48){

  1216.         s->ncomponents = 3;

  1217.     } else if (avctx->pix_fmt == AV_PIX_FMT_GRAY8 || avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY16){

  1218.         s->ncomponents = 1;

  1219.     } else{ // planar YUV

  1220.         s->planar = 1;

  1221.         s->ncomponents = 3;

  1222.         ret = av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt,

  1223.                                                s->chroma_shift, s->chroma_shift + 1);

  1224.         if (ret)

  1225.             return ret;

  1226.     }

  1227. 

  1228.     ff_jpeg2000_init_tier1_luts();

  1229.     ff_mqc_init_context_tables();

  1230.     init_luts();

  1231. 

  1232.     init_quantization(s);

  1233.     if ((ret=init_tiles(s)) < 0)

  1234.         return ret;

  1235. 

  1236.     av_log(s->avctx, AV_LOG_DEBUG, "after init\n");

  1237. 

  1238.     return 0;

  1239. }

  1240. 

  1241. static int j2kenc_destroy(AVCodecContext *avctx)

  1242. {

  1243.     Jpeg2000EncoderContext *s = avctx->priv_data;

  1244. 

  1245.     cleanup(s);

  1246.     return 0;

  1247. }

  1248. 

  1249. // taken from the libopenjpeg wraper so it matches

  1250. 

  1251. #define OFFSET(x) offsetof(Jpeg2000EncoderContext, x)

  1252. #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

  1253. static const AVOption options[] = {

  1254.     { "format",        "Codec Format",      OFFSET(format),        AV_OPT_TYPE_INT,   { .i64 = CODEC_JP2   }, CODEC_J2K, CODEC_JP2,   VE, "format"      },

  1255.     { "j2k",           NULL,                0,                     AV_OPT_TYPE_CONST, { .i64 = CODEC_J2K   }, 0,         0,           VE, "format"      },

  1256.     { "jp2",           NULL,                0,                     AV_OPT_TYPE_CONST, { .i64 = CODEC_JP2   }, 0,         0,           VE, "format"      },

  1257.     { "tile_width",    "Tile Width",        OFFSET(tile_width),    AV_OPT_TYPE_INT,   { .i64 = 256         }, 1,     1<<30,           VE, },

  1258.     { "tile_height",   "Tile Height",       OFFSET(tile_height),   AV_OPT_TYPE_INT,   { .i64 = 256         }, 1,     1<<30,           VE, },

  1259.     { "pred",          "DWT Type",          OFFSET(pred),          AV_OPT_TYPE_INT,   { .i64 = 0           }, 0,         1,           VE, "pred"        },

  1260.     { "dwt97int",      NULL,                0,                     AV_OPT_TYPE_CONST, { .i64 = 0           }, INT_MIN, INT_MAX,       VE, "pred"        },

  1261.     { "dwt53",         NULL,                0,                     AV_OPT_TYPE_CONST, { .i64 = 0           }, INT_MIN, INT_MAX,       VE, "pred"        },

  1262.     { "sop",           "SOP marker",        OFFSET(sop),           AV_OPT_TYPE_INT,   { .i64 = 0           }, 0,         1,           VE, },

  1263.     { "eph",           "EPH marker",        OFFSET(eph),           AV_OPT_TYPE_INT,   { .i64 = 0           }, 0,         1,           VE, },

  1264.     { NULL }

  1265. };

  1266. 

  1267. static const AVClass j2k_class = {

  1268.     .class_name = "jpeg 2000 encoder",

  1269.     .item_name  = av_default_item_name,

  1270.     .option     = options,

  1271.     .version    = LIBAVUTIL_VERSION_INT,

  1272. };

  1273. 

  1274. AVCodec ff_jpeg2000_encoder = {

  1275.     .name           = "jpeg2000",

  1276.     .long_name      = NULL_IF_CONFIG_SMALL("JPEG 2000"),

  1277.     .type           = AVMEDIA_TYPE_VIDEO,

  1278.     .id             = AV_CODEC_ID_JPEG2000,

  1279.     .priv_data_size = sizeof(Jpeg2000EncoderContext),

  1280.     .init           = j2kenc_init,

  1281.     .encode2        = encode_frame,

  1282.     .close          = j2kenc_destroy,

  1283.     .pix_fmts       = (const enum AVPixelFormat[]) {

  1284.         AV_PIX_FMT_RGB24, AV_PIX_FMT_YUV444P, AV_PIX_FMT_GRAY8,

  1285.         AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,

  1286.         AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,

  1287.         AV_PIX_FMT_PAL8,

  1288.         AV_PIX_FMT_RGB48, AV_PIX_FMT_GRAY16,

  1289.         AV_PIX_FMT_NONE

  1290.     },

  1291.     .priv_class     = &j2k_class,

  1292. };