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FFmpeg/libavcodec/mjpegdec.c

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  1. /*

  2.  * MJPEG decoder

  3.  * Copyright (c) 2000, 2001 Fabrice Bellard.

  4.  * Copyright (c) 2003 Alex Beregszaszi

  5.  * Copyright (c) 2003-2004 Michael Niedermayer

  6.  *

  7.  * This file is part of FFmpeg.

  8.  *

  9.  * FFmpeg is free software; you can redistribute it and/or

  10.  * modify it under the terms of the GNU Lesser General Public

  11.  * License as published by the Free Software Foundation; either

  12.  * version 2.1 of the License, or (at your option) any later version.

  13.  *

  14.  * FFmpeg is distributed in the hope that it will be useful,

  15.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  16.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  17.  * Lesser General Public License for more details.

  18.  *

  19.  * You should have received a copy of the GNU Lesser General Public

  20.  * License along with FFmpeg; if not, write to the Free Software

  21.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  22.  *

  23.  * Support for external huffman table, various fixes (AVID workaround),

  24.  * aspecting, new decode_frame mechanism and apple mjpeg-b support

  25.  *                                  by Alex Beregszaszi

  26.  */

  27. 

  28. /**

  29.  * @file mjpegdec.c

  30.  * MJPEG decoder.

  31.  */

  32. 

  33. //#define DEBUG

  34. #include <assert.h>

  35. 

  36. #include "avcodec.h"

  37. #include "dsputil.h"

  38. #include "mjpeg.h"

  39. #include "mjpegdec.h"

  40. #include "jpeglsdec.h"

  41. 

  42. 

  43. static int mjpeg_decode_dht(MJpegDecodeContext *s);

  44. 

  45. static int build_vlc(VLC *vlc, const uint8_t *bits_table, const uint8_t *val_table,

  46.                       int nb_codes, int use_static, int is_ac)

  47. {

  48.     uint8_t huff_size[256+16];

  49.     uint16_t huff_code[256+16];

  50. 

  51.     assert(nb_codes <= 256);

  52. 

  53.     memset(huff_size, 0, sizeof(huff_size));

  54.     ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);

  55. 

  56.     if(is_ac){

  57.         memmove(huff_size+16, huff_size, sizeof(uint8_t)*nb_codes);

  58.         memmove(huff_code+16, huff_code, sizeof(uint16_t)*nb_codes);

  59.         memset(huff_size, 0, sizeof(uint8_t)*16);

  60.         memset(huff_code, 0, sizeof(uint16_t)*16);

  61.         nb_codes += 16;

  62.     }

  63. 

  64.     return init_vlc(vlc, 9, nb_codes, huff_size, 1, 1, huff_code, 2, 2, use_static);

  65. }

  66. 

  67. int ff_mjpeg_decode_init(AVCodecContext *avctx)

  68. {

  69.     MJpegDecodeContext *s = avctx->priv_data;

  70. 

  71.     s->avctx = avctx;

  72.     dsputil_init(&s->dsp, avctx);

  73.     ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);

  74.     s->buffer_size = 0;

  75.     s->buffer = NULL;

  76.     s->start_code = -1;

  77.     s->first_picture = 1;

  78.     s->org_height = avctx->coded_height;

  79. 

  80.     build_vlc(&s->vlcs[0][0], ff_mjpeg_bits_dc_luminance,

  81.               ff_mjpeg_val_dc_luminance, 12, 0, 0);

  82.     build_vlc(&s->vlcs[0][1], ff_mjpeg_bits_dc_chrominance,

  83.               ff_mjpeg_val_dc_chrominance, 12, 0, 0);

  84.     build_vlc(&s->vlcs[1][0], ff_mjpeg_bits_ac_luminance,

  85.               ff_mjpeg_val_ac_luminance, 251, 0, 1);

  86.     build_vlc(&s->vlcs[1][1], ff_mjpeg_bits_ac_chrominance,

  87.               ff_mjpeg_val_ac_chrominance, 251, 0, 1);

  88. 

  89.     if (avctx->flags & CODEC_FLAG_EXTERN_HUFF)

  90.     {

  91.         av_log(avctx, AV_LOG_INFO, "mjpeg: using external huffman table\n");

  92.         init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size*8);

  93.         mjpeg_decode_dht(s);

  94.         /* should check for error - but dunno */

  95.     }

  96.     if (avctx->extradata_size > 9 &&

  97.         AV_RL32(avctx->extradata + 4) == MKTAG('f','i','e','l')) {

  98.         if (avctx->extradata[9] == 6) { /* quicktime icefloe 019 */

  99.             s->interlace_polarity = 1; /* bottom field first */

  100.             av_log(avctx, AV_LOG_DEBUG, "mjpeg bottom field first\n");

  101.         }

  102.     }

  103. 

  104.     return 0;

  105. }

  106. 

  107. 

  108. /* quantize tables */

  109. static int mjpeg_decode_dqt(MJpegDecodeContext *s)

  110. {

  111.     int len, index, i, j;

  112. 

  113.     len = get_bits(&s->gb, 16) - 2;

  114. 

  115.     while (len >= 65) {

  116.         /* only 8 bit precision handled */

  117.         if (get_bits(&s->gb, 4) != 0)

  118.         {

  119.             av_log(s->avctx, AV_LOG_ERROR, "dqt: 16bit precision\n");

  120.             return -1;

  121.         }

  122.         index = get_bits(&s->gb, 4);

  123.         if (index >= 4)

  124.             return -1;

  125.         av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);

  126.         /* read quant table */

  127.         for(i=0;i<64;i++) {

  128.             j = s->scantable.permutated[i];

  129.             s->quant_matrixes[index][j] = get_bits(&s->gb, 8);

  130.         }

  131. 

  132.         //XXX FIXME finetune, and perhaps add dc too

  133.         s->qscale[index]= FFMAX(

  134.             s->quant_matrixes[index][s->scantable.permutated[1]],

  135.             s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;

  136.         av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n", index, s->qscale[index]);

  137.         len -= 65;

  138.     }

  139. 

  140.     return 0;

  141. }

  142. 

  143. /* decode huffman tables and build VLC decoders */

  144. static int mjpeg_decode_dht(MJpegDecodeContext *s)

  145. {

  146.     int len, index, i, class, n, v, code_max;

  147.     uint8_t bits_table[17];

  148.     uint8_t val_table[256];

  149. 

  150.     len = get_bits(&s->gb, 16) - 2;

  151. 

  152.     while (len > 0) {

  153.         if (len < 17)

  154.             return -1;

  155.         class = get_bits(&s->gb, 4);

  156.         if (class >= 2)

  157.             return -1;

  158.         index = get_bits(&s->gb, 4);

  159.         if (index >= 4)

  160.             return -1;

  161.         n = 0;

  162.         for(i=1;i<=16;i++) {

  163.             bits_table[i] = get_bits(&s->gb, 8);

  164.             n += bits_table[i];

  165.         }

  166.         len -= 17;

  167.         if (len < n || n > 256)

  168.             return -1;

  169. 

  170.         code_max = 0;

  171.         for(i=0;i<n;i++) {

  172.             v = get_bits(&s->gb, 8);

  173.             if (v > code_max)

  174.                 code_max = v;

  175.             val_table[i] = v;

  176.         }

  177.         len -= n;

  178. 

  179.         /* build VLC and flush previous vlc if present */

  180.         free_vlc(&s->vlcs[class][index]);

  181.         av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",

  182.                class, index, code_max + 1);

  183.         if(build_vlc(&s->vlcs[class][index], bits_table, val_table, code_max + 1, 0, class > 0) < 0){

  184.             return -1;

  185.         }

  186.     }

  187.     return 0;

  188. }

  189. 

  190. static int mjpeg_decode_sof(MJpegDecodeContext *s)

  191. {

  192.     int len, nb_components, i, width, height, pix_fmt_id;

  193. 

  194.     /* XXX: verify len field validity */

  195.     len = get_bits(&s->gb, 16);

  196.     s->bits= get_bits(&s->gb, 8);

  197. 

  198.     if(s->pegasus_rct) s->bits=9;

  199.     if(s->bits==9 && !s->pegasus_rct) s->rct=1;    //FIXME ugly

  200. 

  201.     if (s->bits != 8 && !s->lossless){

  202.         av_log(s->avctx, AV_LOG_ERROR, "only 8 bits/component accepted\n");

  203.         return -1;

  204.     }

  205. 

  206.     height = get_bits(&s->gb, 16);

  207.     width = get_bits(&s->gb, 16);

  208. 

  209.     //HACK for odd_height.mov

  210.     if(s->interlaced && s->width == width && s->height == height + 1)

  211.         height= s->height;

  212. 

  213.     av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);

  214.     if(avcodec_check_dimensions(s->avctx, width, height))

  215.         return -1;

  216. 

  217.     nb_components = get_bits(&s->gb, 8);

  218.     if (nb_components <= 0 ||

  219.         nb_components > MAX_COMPONENTS)

  220.         return -1;

  221.     if (s->ls && !(s->bits <= 8 || nb_components == 1)){

  222.         av_log(s->avctx, AV_LOG_ERROR, "only <= 8 bits/component or 16-bit gray accepted for JPEG-LS\n");

  223.         return -1;

  224.     }

  225.     s->nb_components = nb_components;

  226.     s->h_max = 1;

  227.     s->v_max = 1;

  228.     for(i=0;i<nb_components;i++) {

  229.         /* component id */

  230.         s->component_id[i] = get_bits(&s->gb, 8) - 1;

  231.         s->h_count[i] = get_bits(&s->gb, 4);

  232.         s->v_count[i] = get_bits(&s->gb, 4);

  233.         /* compute hmax and vmax (only used in interleaved case) */

  234.         if (s->h_count[i] > s->h_max)

  235.             s->h_max = s->h_count[i];

  236.         if (s->v_count[i] > s->v_max)

  237.             s->v_max = s->v_count[i];

  238.         s->quant_index[i] = get_bits(&s->gb, 8);

  239.         if (s->quant_index[i] >= 4)

  240.             return -1;

  241.         av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n", i, s->h_count[i],

  242.                s->v_count[i], s->component_id[i], s->quant_index[i]);

  243.     }

  244. 

  245.     if(s->ls && (s->h_max > 1 || s->v_max > 1)) {

  246.         av_log(s->avctx, AV_LOG_ERROR, "Subsampling in JPEG-LS is not supported.\n");

  247.         return -1;

  248.     }

  249. 

  250.     if(s->v_max==1 && s->h_max==1 && s->lossless==1) s->rgb=1;

  251. 

  252.     /* if different size, realloc/alloc picture */

  253.     /* XXX: also check h_count and v_count */

  254.     if (width != s->width || height != s->height) {

  255.         av_freep(&s->qscale_table);

  256. 

  257.         s->width = width;

  258.         s->height = height;

  259.         s->interlaced = 0;

  260. 

  261.         /* test interlaced mode */

  262.         if (s->first_picture &&

  263.             s->org_height != 0 &&

  264.             s->height < ((s->org_height * 3) / 4)) {

  265.             s->interlaced = 1;

  266.             s->bottom_field = s->interlace_polarity;

  267.             s->picture.interlaced_frame = 1;

  268.             s->picture.top_field_first = !s->interlace_polarity;

  269.             height *= 2;

  270.         }

  271. 

  272.         avcodec_set_dimensions(s->avctx, width, height);

  273. 

  274.         s->qscale_table= av_mallocz((s->width+15)/16);

  275. 

  276.         s->first_picture = 0;

  277.     }

  278. 

  279.     if(s->interlaced && (s->bottom_field == !s->interlace_polarity))

  280.         return 0;

  281. 

  282.     /* XXX: not complete test ! */

  283.     pix_fmt_id = (s->h_count[0] << 20) | (s->v_count[0] << 16) |

  284.                  (s->h_count[1] << 12) | (s->v_count[1] <<  8) |

  285.                  (s->h_count[2] <<  4) |  s->v_count[2];

  286.     av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);

  287.     switch(pix_fmt_id){

  288.     case 0x222222:

  289.     case 0x111111:

  290.         if(s->rgb){

  291.             s->avctx->pix_fmt = PIX_FMT_RGB32;

  292.         }else if(s->nb_components==3)

  293.             s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV444P : PIX_FMT_YUVJ444P;

  294.         else

  295.             s->avctx->pix_fmt = PIX_FMT_GRAY8;

  296.         break;

  297.     case 0x211111:

  298.     case 0x221212:

  299.         s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV422P : PIX_FMT_YUVJ422P;

  300.         break;

  301.     default:

  302.     case 0x221111:

  303.         s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV420P : PIX_FMT_YUVJ420P;

  304.         break;

  305.     }

  306.     if(s->ls){

  307.         if(s->nb_components > 1)

  308.             s->avctx->pix_fmt = PIX_FMT_RGB24;

  309.         else if(s->bits <= 8)

  310.             s->avctx->pix_fmt = PIX_FMT_GRAY8;

  311.         else

  312.             s->avctx->pix_fmt = PIX_FMT_GRAY16;

  313.     }

  314. 

  315.     if(s->picture.data[0])

  316.         s->avctx->release_buffer(s->avctx, &s->picture);

  317. 

  318.     s->picture.reference= 0;

  319.     if(s->avctx->get_buffer(s->avctx, &s->picture) < 0){

  320.         av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");

  321.         return -1;

  322.     }

  323.     s->picture.pict_type= I_TYPE;

  324.     s->picture.key_frame= 1;

  325. 

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

  327.         s->linesize[i]= s->picture.linesize[i] << s->interlaced;

  328.     }

  329. 

  330. //    printf("%d %d %d %d %d %d\n", s->width, s->height, s->linesize[0], s->linesize[1], s->interlaced, s->avctx->height);

  331. 

  332.     if (len != (8+(3*nb_components)))

  333.     {

  334.         av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);

  335.     }

  336. 

  337.     /* totally blank picture as progressive JPEG will only add details to it */

  338.     if(s->progressive){

  339.         memset(s->picture.data[0], 0, s->picture.linesize[0] * s->height);

  340.         memset(s->picture.data[1], 0, s->picture.linesize[1] * s->height >> (s->v_max - s->v_count[1]));

  341.         memset(s->picture.data[2], 0, s->picture.linesize[2] * s->height >> (s->v_max - s->v_count[2]));

  342.     }

  343.     return 0;

  344. }

  345. 

  346. static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)

  347. {

  348.     int code;

  349.     code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);

  350.     if (code < 0)

  351.     {

  352.         av_log(s->avctx, AV_LOG_WARNING, "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n", 0, dc_index,

  353.                &s->vlcs[0][dc_index]);

  354.         return 0xffff;

  355.     }

  356. 

  357.     if(code)

  358.         return get_xbits(&s->gb, code);

  359.     else

  360.         return 0;

  361. }

  362. 

  363. /* decode block and dequantize */

  364. static int decode_block(MJpegDecodeContext *s, DCTELEM *block,

  365.                         int component, int dc_index, int ac_index, int16_t *quant_matrix)

  366. {

  367.     int code, i, j, level, val;

  368. 

  369.     /* DC coef */

  370.     val = mjpeg_decode_dc(s, dc_index);

  371.     if (val == 0xffff) {

  372.         av_log(s->avctx, AV_LOG_ERROR, "error dc\n");

  373.         return -1;

  374.     }

  375.     val = val * quant_matrix[0] + s->last_dc[component];

  376.     s->last_dc[component] = val;

  377.     block[0] = val;

  378.     /* AC coefs */

  379.     i = 0;

  380.     {OPEN_READER(re, &s->gb)

  381.     for(;;) {

  382.         UPDATE_CACHE(re, &s->gb);

  383.         GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2)

  384. 

  385.         /* EOB */

  386.         if (code == 0x10)

  387.             break;

  388.         i += ((unsigned)code) >> 4;

  389.         if(code != 0x100){

  390.             code &= 0xf;

  391.             if(code > MIN_CACHE_BITS - 16){

  392.                 UPDATE_CACHE(re, &s->gb)

  393.             }

  394.             {

  395.                 int cache=GET_CACHE(re,&s->gb);

  396.                 int sign=(~cache)>>31;

  397.                 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;

  398.             }

  399. 

  400.             LAST_SKIP_BITS(re, &s->gb, code)

  401. 

  402.             if (i >= 63) {

  403.                 if(i == 63){

  404.                     j = s->scantable.permutated[63];

  405.                     block[j] = level * quant_matrix[j];

  406.                     break;

  407.                 }

  408.                 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);

  409.                 return -1;

  410.             }

  411.             j = s->scantable.permutated[i];

  412.             block[j] = level * quant_matrix[j];

  413.         }

  414.     }

  415.     CLOSE_READER(re, &s->gb)}

  416. 

  417.     return 0;

  418. }

  419. 

  420. /* decode block and dequantize - progressive JPEG version */

  421. static int decode_block_progressive(MJpegDecodeContext *s, DCTELEM *block,

  422.                         int component, int dc_index, int ac_index, int16_t *quant_matrix,

  423.                         int ss, int se, int Ah, int Al, int *EOBRUN)

  424. {

  425.     int code, i, j, level, val, run;

  426. 

  427.     /* DC coef */

  428.     if(!ss){

  429.         val = mjpeg_decode_dc(s, dc_index);

  430.         if (val == 0xffff) {

  431.             av_log(s->avctx, AV_LOG_ERROR, "error dc\n");

  432.             return -1;

  433.         }

  434.         val = (val * quant_matrix[0] << Al) + s->last_dc[component];

  435.     }else

  436.         val = 0;

  437.     s->last_dc[component] = val;

  438.     block[0] = val;

  439.     if(!se) return 0;

  440.     /* AC coefs */

  441.     if(*EOBRUN){

  442.         (*EOBRUN)--;

  443.         return 0;

  444.     }

  445.     {OPEN_READER(re, &s->gb)

  446.     for(i=ss;;i++) {

  447.         UPDATE_CACHE(re, &s->gb);

  448.         GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2)

  449.         /* Progressive JPEG use AC coeffs from zero and this decoder sets offset 16 by default */

  450.         code -= 16;

  451.         if(code & 0xF) {

  452.             i += ((unsigned) code) >> 4;

  453.             code &= 0xf;

  454.             if(code > MIN_CACHE_BITS - 16){

  455.                 UPDATE_CACHE(re, &s->gb)

  456.             }

  457.             {

  458.                 int cache=GET_CACHE(re,&s->gb);

  459.                 int sign=(~cache)>>31;

  460.                 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;

  461.             }

  462. 

  463.             LAST_SKIP_BITS(re, &s->gb, code)

  464. 

  465.             if (i >= se) {

  466.                 if(i == se){

  467.                     j = s->scantable.permutated[se];

  468.                     block[j] = level * quant_matrix[j] << Al;

  469.                     break;

  470.                 }

  471.                 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);

  472.                 return -1;

  473.             }

  474.             j = s->scantable.permutated[i];

  475.             block[j] = level * quant_matrix[j] << Al;

  476.         }else{

  477.             run = ((unsigned) code) >> 4;

  478.             if(run == 0xF){// ZRL - skip 15 coefficients

  479.                 i += 15;

  480.             }else{

  481.                 val = run;

  482.                 run = (1 << run);

  483.                 UPDATE_CACHE(re, &s->gb);

  484.                 run += (GET_CACHE(re, &s->gb) >> (32 - val)) & (run - 1);

  485.                 if(val)

  486.                     LAST_SKIP_BITS(re, &s->gb, val);

  487.                 *EOBRUN = run - 1;

  488.                 break;

  489.             }

  490.         }

  491.     }

  492.     CLOSE_READER(re, &s->gb)}

  493. 

  494.     return 0;

  495. }

  496. 

  497. static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int predictor, int point_transform){

  498.     int i, mb_x, mb_y;

  499.     uint16_t buffer[32768][4];

  500.     int left[3], top[3], topleft[3];

  501.     const int linesize= s->linesize[0];

  502.     const int mask= (1<<s->bits)-1;

  503. 

  504.     if((unsigned)s->mb_width > 32768) //dynamic alloc

  505.         return -1;

  506. 

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

  508.         buffer[0][i]= 1 << (s->bits + point_transform - 1);

  509.     }

  510.     for(mb_y = 0; mb_y < s->mb_height; mb_y++) {

  511.         const int modified_predictor= mb_y ? predictor : 1;

  512.         uint8_t *ptr = s->picture.data[0] + (linesize * mb_y);

  513. 

  514.         if (s->interlaced && s->bottom_field)

  515.             ptr += linesize >> 1;

  516. 

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

  518.             top[i]= left[i]= topleft[i]= buffer[0][i];

  519.         }

  520.         for(mb_x = 0; mb_x < s->mb_width; mb_x++) {

  521.             if (s->restart_interval && !s->restart_count)

  522.                 s->restart_count = s->restart_interval;

  523. 

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

  525.                 int pred;

  526. 

  527.                 topleft[i]= top[i];

  528.                 top[i]= buffer[mb_x][i];

  529. 

  530.                 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);

  531. 

  532.                 left[i]=

  533.                 buffer[mb_x][i]= mask & (pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform));

  534.             }

  535. 

  536.             if (s->restart_interval && !--s->restart_count) {

  537.                 align_get_bits(&s->gb);

  538.                 skip_bits(&s->gb, 16); /* skip RSTn */

  539.             }

  540.         }

  541. 

  542.         if(s->rct){

  543.             for(mb_x = 0; mb_x < s->mb_width; mb_x++) {

  544.                 ptr[4*mb_x+1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200)>>2);

  545.                 ptr[4*mb_x+0] = buffer[mb_x][1] + ptr[4*mb_x+1];

  546.                 ptr[4*mb_x+2] = buffer[mb_x][2] + ptr[4*mb_x+1];

  547.             }

  548.         }else if(s->pegasus_rct){

  549.             for(mb_x = 0; mb_x < s->mb_width; mb_x++) {

  550.                 ptr[4*mb_x+1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2])>>2);

  551.                 ptr[4*mb_x+0] = buffer[mb_x][1] + ptr[4*mb_x+1];

  552.                 ptr[4*mb_x+2] = buffer[mb_x][2] + ptr[4*mb_x+1];

  553.             }

  554.         }else{

  555.             for(mb_x = 0; mb_x < s->mb_width; mb_x++) {

  556.                 ptr[4*mb_x+0] = buffer[mb_x][0];

  557.                 ptr[4*mb_x+1] = buffer[mb_x][1];

  558.                 ptr[4*mb_x+2] = buffer[mb_x][2];

  559.             }

  560.         }

  561.     }

  562.     return 0;

  563. }

  564. 

  565. static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor, int point_transform){

  566.     int i, mb_x, mb_y;

  567.     const int nb_components=3;

  568. 

  569.     for(mb_y = 0; mb_y < s->mb_height; mb_y++) {

  570.         for(mb_x = 0; mb_x < s->mb_width; mb_x++) {

  571.             if (s->restart_interval && !s->restart_count)

  572.                 s->restart_count = s->restart_interval;

  573. 

  574.             if(mb_x==0 || mb_y==0 || s->interlaced){

  575.                 for(i=0;i<nb_components;i++) {

  576.                     uint8_t *ptr;

  577.                     int n, h, v, x, y, c, j, linesize;

  578.                     n = s->nb_blocks[i];

  579.                     c = s->comp_index[i];

  580.                     h = s->h_scount[i];

  581.                     v = s->v_scount[i];

  582.                     x = 0;

  583.                     y = 0;

  584.                     linesize= s->linesize[c];

  585. 

  586.                     for(j=0; j<n; j++) {

  587.                         int pred;

  588. 

  589.                         ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap

  590.                         if(y==0 && mb_y==0){

  591.                             if(x==0 && mb_x==0){

  592.                                 pred= 128 << point_transform;

  593.                             }else{

  594.                                 pred= ptr[-1];

  595.                             }

  596.                         }else{

  597.                             if(x==0 && mb_x==0){

  598.                                 pred= ptr[-linesize];

  599.                             }else{

  600.                                 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);

  601.                             }

  602.                         }

  603. 

  604.                         if (s->interlaced && s->bottom_field)

  605.                             ptr += linesize >> 1;

  606.                         *ptr= pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);

  607. 

  608.                         if (++x == h) {

  609.                             x = 0;

  610.                             y++;

  611.                         }

  612.                     }

  613.                 }

  614.             }else{

  615.                 for(i=0;i<nb_components;i++) {

  616.                     uint8_t *ptr;

  617.                     int n, h, v, x, y, c, j, linesize;

  618.                     n = s->nb_blocks[i];

  619.                     c = s->comp_index[i];

  620.                     h = s->h_scount[i];

  621.                     v = s->v_scount[i];

  622.                     x = 0;

  623.                     y = 0;

  624.                     linesize= s->linesize[c];

  625. 

  626.                     for(j=0; j<n; j++) {

  627.                         int pred;

  628. 

  629.                         ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap

  630.                         PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);

  631.                         *ptr= pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);

  632.                         if (++x == h) {

  633.                             x = 0;

  634.                             y++;

  635.                         }

  636.                     }

  637.                 }

  638.             }

  639.             if (s->restart_interval && !--s->restart_count) {

  640.                 align_get_bits(&s->gb);

  641.                 skip_bits(&s->gb, 16); /* skip RSTn */

  642.             }

  643.         }

  644.     }

  645.     return 0;

  646. }

  647. 

  648. static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int ss, int se, int Ah, int Al){

  649.     int i, mb_x, mb_y;

  650.     int EOBRUN = 0;

  651. 

  652.     if(Ah) return 0; /* TODO decode refinement planes too */

  653.     for(mb_y = 0; mb_y < s->mb_height; mb_y++) {

  654.         for(mb_x = 0; mb_x < s->mb_width; mb_x++) {

  655.             if (s->restart_interval && !s->restart_count)

  656.                 s->restart_count = s->restart_interval;

  657. 

  658.             for(i=0;i<nb_components;i++) {

  659.                 uint8_t *ptr;

  660.                 int n, h, v, x, y, c, j;

  661.                 n = s->nb_blocks[i];

  662.                 c = s->comp_index[i];

  663.                 h = s->h_scount[i];

  664.                 v = s->v_scount[i];

  665.                 x = 0;

  666.                 y = 0;

  667.                 for(j=0;j<n;j++) {

  668.                     memset(s->block, 0, sizeof(s->block));

  669.                     if (!s->progressive && decode_block(s, s->block, i,

  670.                                      s->dc_index[i], s->ac_index[i],

  671.                                      s->quant_matrixes[ s->quant_index[c] ]) < 0) {

  672.                         av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x);

  673.                         return -1;

  674.                     }

  675.                     if (s->progressive && decode_block_progressive(s, s->block, i,

  676.                                      s->dc_index[i], s->ac_index[i],

  677.                                      s->quant_matrixes[ s->quant_index[c] ], ss, se, Ah, Al, &EOBRUN) < 0) {

  678.                         av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x);

  679.                         return -1;

  680.                     }

  681. //                    av_log(s->avctx, AV_LOG_DEBUG, "mb: %d %d processed\n", mb_y, mb_x);

  682.                     ptr = s->picture.data[c] +

  683.                         (((s->linesize[c] * (v * mb_y + y) * 8) +

  684.                         (h * mb_x + x) * 8) >> s->avctx->lowres);

  685.                     if (s->interlaced && s->bottom_field)

  686.                         ptr += s->linesize[c] >> 1;

  687. //av_log(NULL, AV_LOG_DEBUG, "%d %d %d %d %d %d %d %d \n", mb_x, mb_y, x, y, c, s->bottom_field, (v * mb_y + y) * 8, (h * mb_x + x) * 8);

  688.                     if(!s->progressive)

  689.                         s->dsp.idct_put(ptr, s->linesize[c], s->block);

  690.                     else

  691.                         s->dsp.idct_add(ptr, s->linesize[c], s->block);

  692.                     if (++x == h) {

  693.                         x = 0;

  694.                         y++;

  695.                     }

  696.                 }

  697.             }

  698.             /* (< 1350) buggy workaround for Spectralfan.mov, should be fixed */

  699.             if (s->restart_interval && (s->restart_interval < 1350) &&

  700.                 !--s->restart_count) {

  701.                 align_get_bits(&s->gb);

  702.                 skip_bits(&s->gb, 16); /* skip RSTn */

  703.                 for (i=0; i<nb_components; i++) /* reset dc */

  704.                     s->last_dc[i] = 1024;

  705.             }

  706.         }

  707.     }

  708.     return 0;

  709. }

  710. 

  711. static int mjpeg_decode_sos(MJpegDecodeContext *s)

  712. {

  713.     int len, nb_components, i, h, v, predictor, point_transform;

  714.     int vmax, hmax, index, id;

  715.     const int block_size= s->lossless ? 1 : 8;

  716.     int ilv, prev_shift;

  717. 

  718.     /* XXX: verify len field validity */

  719.     len = get_bits(&s->gb, 16);

  720.     nb_components = get_bits(&s->gb, 8);

  721.     if (len != 6+2*nb_components)

  722.     {

  723.         av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);

  724.         return -1;

  725.     }

  726.     vmax = 0;

  727.     hmax = 0;

  728.     for(i=0;i<nb_components;i++) {

  729.         id = get_bits(&s->gb, 8) - 1;

  730.         av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);

  731.         /* find component index */

  732.         for(index=0;index<s->nb_components;index++)

  733.             if (id == s->component_id[index])

  734.                 break;

  735.         if (index == s->nb_components)

  736.         {

  737.             av_log(s->avctx, AV_LOG_ERROR, "decode_sos: index(%d) out of components\n", index);

  738.             return -1;

  739.         }

  740. 

  741.         s->comp_index[i] = index;

  742. 

  743.         s->nb_blocks[i] = s->h_count[index] * s->v_count[index];

  744.         s->h_scount[i] = s->h_count[index];

  745.         s->v_scount[i] = s->v_count[index];

  746. 

  747.         s->dc_index[i] = get_bits(&s->gb, 4);

  748.         s->ac_index[i] = get_bits(&s->gb, 4);

  749. 

  750.         if (s->dc_index[i] <  0 || s->ac_index[i] < 0 ||

  751.             s->dc_index[i] >= 4 || s->ac_index[i] >= 4)

  752.             goto out_of_range;

  753. #if 0 //buggy

  754.         switch(s->start_code)

  755.         {

  756.             case SOF0:

  757.                 if (dc_index[i] > 1 || ac_index[i] > 1)

  758.                     goto out_of_range;

  759.                 break;

  760.             case SOF1:

  761.             case SOF2:

  762.                 if (dc_index[i] > 3 || ac_index[i] > 3)

  763.                     goto out_of_range;

  764.                 break;

  765.             case SOF3:

  766.                 if (dc_index[i] > 3 || ac_index[i] != 0)

  767.                     goto out_of_range;

  768.                 break;

  769.         }

  770. #endif

  771.     }

  772. 

  773.     predictor= get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */

  774.     ilv= get_bits(&s->gb, 8);    /* JPEG Se / JPEG-LS ILV */

  775.     prev_shift = get_bits(&s->gb, 4); /* Ah */

  776.     point_transform= get_bits(&s->gb, 4); /* Al */

  777. 

  778.     for(i=0;i<nb_components;i++)

  779.         s->last_dc[i] = 1024;

  780. 

  781.     if (nb_components > 1) {

  782.         /* interleaved stream */

  783.         s->mb_width  = (s->width  + s->h_max * block_size - 1) / (s->h_max * block_size);

  784.         s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);

  785.     } else if(!s->ls) { /* skip this for JPEG-LS */

  786.         h = s->h_max / s->h_scount[0];

  787.         v = s->v_max / s->v_scount[0];

  788.         s->mb_width  = (s->width  + h * block_size - 1) / (h * block_size);

  789.         s->mb_height = (s->height + v * block_size - 1) / (v * block_size);

  790.         s->nb_blocks[0] = 1;

  791.         s->h_scount[0] = 1;

  792.         s->v_scount[0] = 1;

  793.     }

  794. 

  795.     if(s->avctx->debug & FF_DEBUG_PICT_INFO)

  796.         av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d %s\n", s->lossless ? "lossless" : "sequencial DCT", s->rgb ? "RGB" : "",

  797.                predictor, point_transform, ilv, s->bits,

  798.                s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""));

  799. 

  800. 

  801.     /* mjpeg-b can have padding bytes between sos and image data, skip them */

  802.     for (i = s->mjpb_skiptosod; i > 0; i--)

  803.         skip_bits(&s->gb, 8);

  804. 

  805.     if(s->lossless){

  806.         if(ENABLE_JPEGLS_DECODER && s->ls){

  807. //            for(){

  808. //            reset_ls_coding_parameters(s, 0);

  809. 

  810.             ff_jpegls_decode_picture(s, predictor, point_transform, ilv);

  811.         }else{

  812.             if(s->rgb){

  813.                 if(ljpeg_decode_rgb_scan(s, predictor, point_transform) < 0)

  814.                     return -1;

  815.             }else{

  816.                 if(ljpeg_decode_yuv_scan(s, predictor, point_transform) < 0)

  817.                     return -1;

  818.             }

  819.         }

  820.     }else{

  821.         if(mjpeg_decode_scan(s, nb_components, predictor, ilv, prev_shift, point_transform) < 0)

  822.             return -1;

  823.     }

  824.     emms_c();

  825.     return 0;

  826.  out_of_range:

  827.     av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");

  828.     return -1;

  829. }

  830. 

  831. static int mjpeg_decode_dri(MJpegDecodeContext *s)

  832. {

  833.     if (get_bits(&s->gb, 16) != 4)

  834.         return -1;

  835.     s->restart_interval = get_bits(&s->gb, 16);

  836.     s->restart_count = 0;

  837.     av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n", s->restart_interval);

  838. 

  839.     return 0;

  840. }

  841. 

  842. static int mjpeg_decode_app(MJpegDecodeContext *s)

  843. {

  844.     int len, id, i;

  845. 

  846.     len = get_bits(&s->gb, 16);

  847.     if (len < 5)

  848.         return -1;

  849.     if(8*len + get_bits_count(&s->gb) > s->gb.size_in_bits)

  850.         return -1;

  851. 

  852.     id = (get_bits(&s->gb, 16) << 16) | get_bits(&s->gb, 16);

  853.     id = be2me_32(id);

  854.     len -= 6;

  855. 

  856.     if(s->avctx->debug & FF_DEBUG_STARTCODE){

  857.         av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);

  858.     }

  859. 

  860.     /* buggy AVID, it puts EOI only at every 10th frame */

  861.     /* also this fourcc is used by non-avid files too, it holds some

  862.        informations, but it's always present in AVID creates files */

  863.     if (id == ff_get_fourcc("AVI1"))

  864.     {

  865.         /* structure:

  866.             4bytes      AVI1

  867.             1bytes      polarity

  868.             1bytes      always zero

  869.             4bytes      field_size

  870.             4bytes      field_size_less_padding

  871.         */

  872.             s->buggy_avid = 1;

  873. //        if (s->first_picture)

  874. //            printf("mjpeg: workarounding buggy AVID\n");

  875.         i = get_bits(&s->gb, 8);

  876.         if     (i==2) s->bottom_field= 1;

  877.         else if(i==1) s->bottom_field= 0;

  878. #if 0

  879.         skip_bits(&s->gb, 8);

  880.         skip_bits(&s->gb, 32);

  881.         skip_bits(&s->gb, 32);

  882.         len -= 10;

  883. #endif

  884. //        if (s->interlace_polarity)

  885. //            printf("mjpeg: interlace polarity: %d\n", s->interlace_polarity);

  886.         goto out;

  887.     }

  888. 

  889. //    len -= 2;

  890. 

  891.     if (id == ff_get_fourcc("JFIF"))

  892.     {

  893.         int t_w, t_h, v1, v2;

  894.         skip_bits(&s->gb, 8); /* the trailing zero-byte */

  895.         v1= get_bits(&s->gb, 8);

  896.         v2= get_bits(&s->gb, 8);

  897.         skip_bits(&s->gb, 8);

  898. 

  899.         s->avctx->sample_aspect_ratio.num= get_bits(&s->gb, 16);

  900.         s->avctx->sample_aspect_ratio.den= get_bits(&s->gb, 16);

  901. 

  902.         if (s->avctx->debug & FF_DEBUG_PICT_INFO)

  903.             av_log(s->avctx, AV_LOG_INFO, "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",

  904.                 v1, v2,

  905.                 s->avctx->sample_aspect_ratio.num,

  906.                 s->avctx->sample_aspect_ratio.den

  907.             );

  908. 

  909.         t_w = get_bits(&s->gb, 8);

  910.         t_h = get_bits(&s->gb, 8);

  911.         if (t_w && t_h)

  912.         {

  913.             /* skip thumbnail */

  914.             if (len-10-(t_w*t_h*3) > 0)

  915.                 len -= t_w*t_h*3;

  916.         }

  917.         len -= 10;

  918.         goto out;

  919.     }

  920. 

  921.     if (id == ff_get_fourcc("Adob") && (get_bits(&s->gb, 8) == 'e'))

  922.     {

  923.         if (s->avctx->debug & FF_DEBUG_PICT_INFO)

  924.             av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");

  925.         skip_bits(&s->gb, 16); /* version */

  926.         skip_bits(&s->gb, 16); /* flags0 */

  927.         skip_bits(&s->gb, 16); /* flags1 */

  928.         skip_bits(&s->gb, 8);  /* transform */

  929.         len -= 7;

  930.         goto out;

  931.     }

  932. 

  933.     if (id == ff_get_fourcc("LJIF")){

  934.         if (s->avctx->debug & FF_DEBUG_PICT_INFO)

  935.             av_log(s->avctx, AV_LOG_INFO, "Pegasus lossless jpeg header found\n");

  936.         skip_bits(&s->gb, 16); /* version ? */

  937.         skip_bits(&s->gb, 16); /* unknwon always 0? */

  938.         skip_bits(&s->gb, 16); /* unknwon always 0? */

  939.         skip_bits(&s->gb, 16); /* unknwon always 0? */

  940.         switch( get_bits(&s->gb, 8)){

  941.         case 1:

  942.             s->rgb= 1;

  943.             s->pegasus_rct=0;

  944.             break;

  945.         case 2:

  946.             s->rgb= 1;

  947.             s->pegasus_rct=1;

  948.             break;

  949.         default:

  950.             av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n");

  951.         }

  952.         len -= 9;

  953.         goto out;

  954.     }

  955. 

  956.     /* Apple MJPEG-A */

  957.     if ((s->start_code == APP1) && (len > (0x28 - 8)))

  958.     {

  959.         id = (get_bits(&s->gb, 16) << 16) | get_bits(&s->gb, 16);

  960.         id = be2me_32(id);

  961.         len -= 4;

  962.         if (id == ff_get_fourcc("mjpg")) /* Apple MJPEG-A */

  963.         {

  964. #if 0

  965.             skip_bits(&s->gb, 32); /* field size */

  966.             skip_bits(&s->gb, 32); /* pad field size */

  967.             skip_bits(&s->gb, 32); /* next off */

  968.             skip_bits(&s->gb, 32); /* quant off */

  969.             skip_bits(&s->gb, 32); /* huff off */

  970.             skip_bits(&s->gb, 32); /* image off */

  971.             skip_bits(&s->gb, 32); /* scan off */

  972.             skip_bits(&s->gb, 32); /* data off */

  973. #endif

  974.             if (s->avctx->debug & FF_DEBUG_PICT_INFO)

  975.                 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");

  976.         }

  977.     }

  978. 

  979. out:

  980.     /* slow but needed for extreme adobe jpegs */

  981.     if (len < 0)

  982.         av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error, decode_app parser read over the end\n");

  983.     while(--len > 0)

  984.         skip_bits(&s->gb, 8);

  985. 

  986.     return 0;

  987. }

  988. 

  989. static int mjpeg_decode_com(MJpegDecodeContext *s)

  990. {

  991.     int len = get_bits(&s->gb, 16);

  992.     if (len >= 2 && 8*len - 16 + get_bits_count(&s->gb) <= s->gb.size_in_bits) {

  993.         char *cbuf = av_malloc(len - 1);

  994.         if (cbuf) {

  995.             int i;

  996.             for (i = 0; i < len - 2; i++)

  997.                 cbuf[i] = get_bits(&s->gb, 8);

  998.             if (i > 0 && cbuf[i-1] == '\n')

  999.                 cbuf[i-1] = 0;

  1000.             else

  1001.                 cbuf[i] = 0;

  1002. 

  1003.             if(s->avctx->debug & FF_DEBUG_PICT_INFO)

  1004.                 av_log(s->avctx, AV_LOG_INFO, "mjpeg comment: '%s'\n", cbuf);

  1005. 

  1006.             /* buggy avid, it puts EOI only at every 10th frame */

  1007.             if (!strcmp(cbuf, "AVID"))

  1008.             {

  1009.                 s->buggy_avid = 1;

  1010.                 //        if (s->first_picture)

  1011.                 //            printf("mjpeg: workarounding buggy AVID\n");

  1012.             }

  1013.             else if(!strcmp(cbuf, "CS=ITU601")){

  1014.                 s->cs_itu601= 1;

  1015.             }

  1016. 

  1017.             av_free(cbuf);

  1018.         }

  1019.     }

  1020. 

  1021.     return 0;

  1022. }

  1023. 

  1024. #if 0

  1025. static int valid_marker_list[] =

  1026. {

  1027.         /* 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f */

  1028. /* 0 */    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

  1029. /* 1 */    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

  1030. /* 2 */    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

  1031. /* 3 */    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

  1032. /* 4 */    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

  1033. /* 5 */    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

  1034. /* 6 */    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

  1035. /* 7 */    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

  1036. /* 8 */    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

  1037. /* 9 */    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

  1038. /* a */    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

  1039. /* b */    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

  1040. /* c */    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,

  1041. /* d */    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,

  1042. /* e */    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,

  1043. /* f */    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0,

  1044. }

  1045. #endif

  1046. 

  1047. /* return the 8 bit start code value and update the search

  1048.    state. Return -1 if no start code found */

  1049. static int find_marker(uint8_t **pbuf_ptr, uint8_t *buf_end)

  1050. {

  1051.     uint8_t *buf_ptr;

  1052.     unsigned int v, v2;

  1053.     int val;

  1054. #ifdef DEBUG

  1055.     int skipped=0;

  1056. #endif

  1057. 

  1058.     buf_ptr = *pbuf_ptr;

  1059.     while (buf_ptr < buf_end) {

  1060.         v = *buf_ptr++;

  1061.         v2 = *buf_ptr;

  1062.         if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {

  1063.             val = *buf_ptr++;

  1064.             goto found;

  1065.         }

  1066. #ifdef DEBUG

  1067.         skipped++;

  1068. #endif

  1069.     }

  1070.     val = -1;

  1071. found:

  1072. #ifdef DEBUG

  1073.     av_log(NULL, AV_LOG_VERBOSE, "find_marker skipped %d bytes\n", skipped);

  1074. #endif

  1075.     *pbuf_ptr = buf_ptr;

  1076.     return val;

  1077. }

  1078. 

  1079. int ff_mjpeg_decode_frame(AVCodecContext *avctx,

  1080.                               void *data, int *data_size,

  1081.                               uint8_t *buf, int buf_size)

  1082. {

  1083.     MJpegDecodeContext *s = avctx->priv_data;

  1084.     uint8_t *buf_end, *buf_ptr;

  1085.     int start_code;

  1086.     AVFrame *picture = data;

  1087. 

  1088.     buf_ptr = buf;

  1089.     buf_end = buf + buf_size;

  1090.     while (buf_ptr < buf_end) {

  1091.         /* find start next marker */

  1092.         start_code = find_marker(&buf_ptr, buf_end);

  1093.         {

  1094.             /* EOF */

  1095.             if (start_code < 0) {

  1096.                 goto the_end;

  1097.             } else {

  1098.                 av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%d\n", start_code, buf_end - buf_ptr);

  1099. 

  1100.                 if ((buf_end - buf_ptr) > s->buffer_size)

  1101.                 {

  1102.                     av_free(s->buffer);

  1103.                     s->buffer_size = buf_end-buf_ptr;

  1104.                     s->buffer = av_malloc(s->buffer_size + FF_INPUT_BUFFER_PADDING_SIZE);

  1105.                     av_log(avctx, AV_LOG_DEBUG, "buffer too small, expanding to %d bytes\n",

  1106.                         s->buffer_size);

  1107.                 }

  1108. 

  1109.                 /* unescape buffer of SOS, use special treatment for JPEG-LS */

  1110.                 if (start_code == SOS && !s->ls)

  1111.                 {

  1112.                     uint8_t *src = buf_ptr;

  1113.                     uint8_t *dst = s->buffer;

  1114. 

  1115.                     while (src<buf_end)

  1116.                     {

  1117.                         uint8_t x = *(src++);

  1118. 

  1119.                         *(dst++) = x;

  1120.                         if (avctx->codec_id != CODEC_ID_THP)

  1121.                         {

  1122.                             if (x == 0xff) {

  1123.                                 while (src < buf_end && x == 0xff)

  1124.                                     x = *(src++);

  1125. 

  1126.                                 if (x >= 0xd0 && x <= 0xd7)

  1127.                                     *(dst++) = x;

  1128.                                 else if (x)

  1129.                                     break;

  1130.                             }

  1131.                         }

  1132.                     }

  1133.                     init_get_bits(&s->gb, s->buffer, (dst - s->buffer)*8);

  1134. 

  1135.                     av_log(avctx, AV_LOG_DEBUG, "escaping removed %d bytes\n",

  1136.                            (buf_end - buf_ptr) - (dst - s->buffer));

  1137.                 }

  1138.                 else if(start_code == SOS && s->ls){

  1139.                     uint8_t *src = buf_ptr;

  1140.                     uint8_t *dst = s->buffer;

  1141.                     int bit_count = 0;

  1142.                     int t = 0, b = 0;

  1143.                     PutBitContext pb;

  1144. 

  1145.                     s->cur_scan++;

  1146. 

  1147.                     /* find marker */

  1148.                     while (src + t < buf_end){

  1149.                         uint8_t x = src[t++];

  1150.                         if (x == 0xff){

  1151.                             while((src + t < buf_end) && x == 0xff)

  1152.                                 x = src[t++];

  1153.                             if (x & 0x80) {

  1154.                                 t -= 2;

  1155.                                 break;

  1156.                             }

  1157.                         }

  1158.                     }

  1159.                     bit_count = t * 8;

  1160. 

  1161.                     init_put_bits(&pb, dst, t);

  1162. 

  1163.                     /* unescape bitstream */

  1164.                     while(b < t){

  1165.                         uint8_t x = src[b++];

  1166.                         put_bits(&pb, 8, x);

  1167.                         if(x == 0xFF){

  1168.                             x = src[b++];

  1169.                             put_bits(&pb, 7, x);

  1170.                             bit_count--;

  1171.                         }

  1172.                     }

  1173.                     flush_put_bits(&pb);

  1174. 

  1175.                     init_get_bits(&s->gb, dst, bit_count);

  1176.                 }

  1177.                 else

  1178.                     init_get_bits(&s->gb, buf_ptr, (buf_end - buf_ptr)*8);

  1179. 

  1180.                 s->start_code = start_code;

  1181.                 if(s->avctx->debug & FF_DEBUG_STARTCODE){

  1182.                     av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);

  1183.                 }

  1184. 

  1185.                 /* process markers */

  1186.                 if (start_code >= 0xd0 && start_code <= 0xd7) {

  1187.                     av_log(avctx, AV_LOG_DEBUG, "restart marker: %d\n", start_code&0x0f);

  1188.                     /* APP fields */

  1189.                 } else if (start_code >= APP0 && start_code <= APP15) {

  1190.                     mjpeg_decode_app(s);

  1191.                     /* Comment */

  1192.                 } else if (start_code == COM){

  1193.                     mjpeg_decode_com(s);

  1194.                 }

  1195. 

  1196.                 switch(start_code) {

  1197.                 case SOI:

  1198.                     s->restart_interval = 0;

  1199. 

  1200.                     s->restart_count = 0;

  1201.                     /* nothing to do on SOI */

  1202.                     break;

  1203.                 case DQT:

  1204.                     mjpeg_decode_dqt(s);

  1205.                     break;

  1206.                 case DHT:

  1207.                     if(mjpeg_decode_dht(s) < 0){

  1208.                         av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");

  1209.                         return -1;

  1210.                     }

  1211.                     break;

  1212.                 case SOF0:

  1213.                     s->lossless=0;

  1214.                     s->ls=0;

  1215.                     s->progressive=0;

  1216.                     if (mjpeg_decode_sof(s) < 0)

  1217.                         return -1;

  1218.                     break;

  1219.                 case SOF2:

  1220.                     s->lossless=0;

  1221.                     s->ls=0;

  1222.                     s->progressive=1;

  1223.                     if (mjpeg_decode_sof(s) < 0)

  1224.                         return -1;

  1225.                     break;

  1226.                 case SOF3:

  1227.                     s->lossless=1;

  1228.                     s->ls=0;

  1229.                     s->progressive=0;

  1230.                     if (mjpeg_decode_sof(s) < 0)

  1231.                         return -1;

  1232.                     break;

  1233.                 case SOF48:

  1234.                     s->lossless=1;

  1235.                     s->ls=1;

  1236.                     s->progressive=0;

  1237.                     if (mjpeg_decode_sof(s) < 0)

  1238.                         return -1;

  1239.                     break;

  1240.                 case LSE:

  1241.                     if (!ENABLE_JPEGLS_DECODER || ff_jpegls_decode_lse(s) < 0)

  1242.                         return -1;

  1243.                     break;

  1244.                 case EOI:

  1245.                     s->cur_scan = 0;

  1246.                     if ((s->buggy_avid && !s->interlaced) || s->restart_interval)

  1247.                         break;

  1248. eoi_parser:

  1249.                     {

  1250.                         if (s->interlaced) {

  1251.                             s->bottom_field ^= 1;

  1252.                             /* if not bottom field, do not output image yet */

  1253.                             if (s->bottom_field == !s->interlace_polarity)

  1254.                                 goto not_the_end;

  1255.                         }

  1256.                         *picture = s->picture;

  1257.                         *data_size = sizeof(AVFrame);

  1258. 

  1259.                         if(!s->lossless){

  1260.                             picture->quality= FFMAX(FFMAX(s->qscale[0], s->qscale[1]), s->qscale[2]);

  1261.                             picture->qstride= 0;

  1262.                             picture->qscale_table= s->qscale_table;

  1263.                             memset(picture->qscale_table, picture->quality, (s->width+15)/16);

  1264.                             if(avctx->debug & FF_DEBUG_QP)

  1265.                                 av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", picture->quality);

  1266.                             picture->quality*= FF_QP2LAMBDA;

  1267.                         }

  1268. 

  1269.                         goto the_end;

  1270.                     }

  1271.                     break;

  1272.                 case SOS:

  1273.                     mjpeg_decode_sos(s);

  1274.                     /* buggy avid puts EOI every 10-20th frame */

  1275.                     /* if restart period is over process EOI */

  1276.                     if ((s->buggy_avid && !s->interlaced) || s->restart_interval)

  1277.                         goto eoi_parser;

  1278.                     break;

  1279.                 case DRI:

  1280.                     mjpeg_decode_dri(s);

  1281.                     break;

  1282.                 case SOF1:

  1283.                 case SOF5:

  1284.                 case SOF6:

  1285.                 case SOF7:

  1286.                 case SOF9:

  1287.                 case SOF10:

  1288.                 case SOF11:

  1289.                 case SOF13:

  1290.                 case SOF14:

  1291.                 case SOF15:

  1292.                 case JPG:

  1293.                     av_log(avctx, AV_LOG_ERROR, "mjpeg: unsupported coding type (%x)\n", start_code);

  1294.                     break;

  1295. //                default:

  1296. //                    printf("mjpeg: unsupported marker (%x)\n", start_code);

  1297. //                    break;

  1298.                 }

  1299. 

  1300. not_the_end:

  1301.                 /* eof process start code */

  1302.                 buf_ptr += (get_bits_count(&s->gb)+7)/8;

  1303.                 av_log(avctx, AV_LOG_DEBUG, "marker parser used %d bytes (%d bits)\n",

  1304.                        (get_bits_count(&s->gb)+7)/8, get_bits_count(&s->gb));

  1305.             }

  1306.         }

  1307.     }

  1308. the_end:

  1309.     av_log(avctx, AV_LOG_DEBUG, "mjpeg decode frame unused %d bytes\n", buf_end - buf_ptr);

  1310. //    return buf_end - buf_ptr;

  1311.     return buf_ptr - buf;

  1312. }

  1313. 

  1314. static int mjpegb_decode_frame(AVCodecContext *avctx,

  1315.                               void *data, int *data_size,

  1316.                               uint8_t *buf, int buf_size)

  1317. {

  1318.     MJpegDecodeContext *s = avctx->priv_data;

  1319.     uint8_t *buf_end, *buf_ptr;

  1320.     AVFrame *picture = data;

  1321.     GetBitContext hgb; /* for the header */

  1322.     uint32_t dqt_offs, dht_offs, sof_offs, sos_offs, second_field_offs;

  1323.     uint32_t field_size, sod_offs;

  1324. 

  1325.     buf_ptr = buf;

  1326.     buf_end = buf + buf_size;

  1327. 

  1328. read_header:

  1329.     /* reset on every SOI */

  1330.     s->restart_interval = 0;

  1331.     s->restart_count = 0;

  1332.     s->mjpb_skiptosod = 0;

  1333. 

  1334.     init_get_bits(&hgb, buf_ptr, /*buf_size*/(buf_end - buf_ptr)*8);

  1335. 

  1336.     skip_bits(&hgb, 32); /* reserved zeros */

  1337. 

  1338.     if (get_bits_long(&hgb, 32) != MKBETAG('m','j','p','g'))

  1339.     {

  1340.         av_log(avctx, AV_LOG_WARNING, "not mjpeg-b (bad fourcc)\n");

  1341.         return 0;

  1342.     }

  1343. 

  1344.     field_size = get_bits_long(&hgb, 32); /* field size */

  1345.     av_log(avctx, AV_LOG_DEBUG, "field size: 0x%x\n", field_size);

  1346.     skip_bits(&hgb, 32); /* padded field size */

  1347.     second_field_offs = get_bits_long(&hgb, 32);

  1348.     av_log(avctx, AV_LOG_DEBUG, "second field offs: 0x%x\n", second_field_offs);

  1349. 

  1350.     dqt_offs = get_bits_long(&hgb, 32);

  1351.     av_log(avctx, AV_LOG_DEBUG, "dqt offs: 0x%x\n", dqt_offs);

  1352.     if (dqt_offs)

  1353.     {

  1354.         init_get_bits(&s->gb, buf+dqt_offs, (buf_end - (buf+dqt_offs))*8);

  1355.         s->start_code = DQT;

  1356.         mjpeg_decode_dqt(s);

  1357.     }

  1358. 

  1359.     dht_offs = get_bits_long(&hgb, 32);

  1360.     av_log(avctx, AV_LOG_DEBUG, "dht offs: 0x%x\n", dht_offs);

  1361.     if (dht_offs)

  1362.     {

  1363.         init_get_bits(&s->gb, buf+dht_offs, (buf_end - (buf+dht_offs))*8);

  1364.         s->start_code = DHT;

  1365.         mjpeg_decode_dht(s);

  1366.     }

  1367. 

  1368.     sof_offs = get_bits_long(&hgb, 32);

  1369.     av_log(avctx, AV_LOG_DEBUG, "sof offs: 0x%x\n", sof_offs);

  1370.     if (sof_offs)

  1371.     {

  1372.         init_get_bits(&s->gb, buf+sof_offs, (buf_end - (buf+sof_offs))*8);

  1373.         s->start_code = SOF0;

  1374.         if (mjpeg_decode_sof(s) < 0)

  1375.             return -1;

  1376.     }

  1377. 

  1378.     sos_offs = get_bits_long(&hgb, 32);

  1379.     av_log(avctx, AV_LOG_DEBUG, "sos offs: 0x%x\n", sos_offs);

  1380.     sod_offs = get_bits_long(&hgb, 32);

  1381.     av_log(avctx, AV_LOG_DEBUG, "sod offs: 0x%x\n", sod_offs);

  1382.     if (sos_offs)

  1383.     {

  1384. //        init_get_bits(&s->gb, buf+sos_offs, (buf_end - (buf+sos_offs))*8);

  1385.         init_get_bits(&s->gb, buf+sos_offs, field_size*8);

  1386.         s->mjpb_skiptosod = (sod_offs - sos_offs - show_bits(&s->gb, 16));

  1387.         s->start_code = SOS;

  1388.         mjpeg_decode_sos(s);

  1389.     }

  1390. 

  1391.     if (s->interlaced) {

  1392.         s->bottom_field ^= 1;

  1393.         /* if not bottom field, do not output image yet */

  1394.         if (s->bottom_field && second_field_offs)

  1395.         {

  1396.             buf_ptr = buf + second_field_offs;

  1397.             second_field_offs = 0;

  1398.             goto read_header;

  1399.             }

  1400.     }

  1401. 

  1402.     //XXX FIXME factorize, this looks very similar to the EOI code

  1403. 

  1404.     *picture= s->picture;

  1405.     *data_size = sizeof(AVFrame);

  1406. 

  1407.     if(!s->lossless){

  1408.         picture->quality= FFMAX(FFMAX(s->qscale[0], s->qscale[1]), s->qscale[2]);

  1409.         picture->qstride= 0;

  1410.         picture->qscale_table= s->qscale_table;

  1411.         memset(picture->qscale_table, picture->quality, (s->width+15)/16);

  1412.         if(avctx->debug & FF_DEBUG_QP)

  1413.             av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", picture->quality);

  1414.         picture->quality*= FF_QP2LAMBDA;

  1415.     }

  1416. 

  1417.     return buf_ptr - buf;

  1418. }

  1419. 

  1420. #include "sp5x.h"

  1421. 

  1422. static int sp5x_decode_frame(AVCodecContext *avctx,

  1423.                               void *data, int *data_size,

  1424.                               uint8_t *buf, int buf_size)

  1425. {

  1426. #if 0

  1427.     MJpegDecodeContext *s = avctx->priv_data;

  1428. #endif

  1429.     const int qscale = 5;

  1430.     uint8_t *buf_ptr, *buf_end, *recoded;

  1431.     int i = 0, j = 0;

  1432. 

  1433.     if (!avctx->width || !avctx->height)

  1434.         return -1;

  1435. 

  1436.     buf_ptr = buf;

  1437.     buf_end = buf + buf_size;

  1438. 

  1439. #if 1

  1440.     recoded = av_mallocz(buf_size + 1024);

  1441.     if (!recoded)

  1442.         return -1;

  1443. 

  1444.     /* SOI */

  1445.     recoded[j++] = 0xFF;

  1446.     recoded[j++] = 0xD8;

  1447. 

  1448.     memcpy(recoded+j, &sp5x_data_dqt[0], sizeof(sp5x_data_dqt));

  1449.     memcpy(recoded+j+5, &sp5x_quant_table[qscale * 2], 64);

  1450.     memcpy(recoded+j+70, &sp5x_quant_table[(qscale * 2) + 1], 64);

  1451.     j += sizeof(sp5x_data_dqt);

  1452. 

  1453.     memcpy(recoded+j, &sp5x_data_dht[0], sizeof(sp5x_data_dht));

  1454.     j += sizeof(sp5x_data_dht);

  1455. 

  1456.     memcpy(recoded+j, &sp5x_data_sof[0], sizeof(sp5x_data_sof));

  1457.     recoded[j+5] = (avctx->coded_height >> 8) & 0xFF;

  1458.     recoded[j+6] = avctx->coded_height & 0xFF;

  1459.     recoded[j+7] = (avctx->coded_width >> 8) & 0xFF;

  1460.     recoded[j+8] = avctx->coded_width & 0xFF;

  1461.     j += sizeof(sp5x_data_sof);

  1462. 

  1463.     memcpy(recoded+j, &sp5x_data_sos[0], sizeof(sp5x_data_sos));

  1464.     j += sizeof(sp5x_data_sos);

  1465. 

  1466.     for (i = 14; i < buf_size && j < buf_size+1024-2; i++)

  1467.     {

  1468.         recoded[j++] = buf[i];

  1469.         if (buf[i] == 0xff)

  1470.             recoded[j++] = 0;

  1471.     }

  1472. 

  1473.     /* EOI */

  1474.     recoded[j++] = 0xFF;

  1475.     recoded[j++] = 0xD9;

  1476. 

  1477.     i = ff_mjpeg_decode_frame(avctx, data, data_size, recoded, j);

  1478. 

  1479.     av_free(recoded);

  1480. 

  1481. #else

  1482.     /* SOF */

  1483.     s->bits = 8;

  1484.     s->width  = avctx->coded_width;

  1485.     s->height = avctx->coded_height;

  1486.     s->nb_components = 3;

  1487.     s->component_id[0] = 0;

  1488.     s->h_count[0] = 2;

  1489.     s->v_count[0] = 2;

  1490.     s->quant_index[0] = 0;

  1491.     s->component_id[1] = 1;

  1492.     s->h_count[1] = 1;

  1493.     s->v_count[1] = 1;

  1494.     s->quant_index[1] = 1;

  1495.     s->component_id[2] = 2;

  1496.     s->h_count[2] = 1;

  1497.     s->v_count[2] = 1;

  1498.     s->quant_index[2] = 1;

  1499.     s->h_max = 2;

  1500.     s->v_max = 2;

  1501. 

  1502.     s->qscale_table = av_mallocz((s->width+15)/16);

  1503.     avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV420P : PIX_FMT_YUVJ420;

  1504.     s->interlaced = 0;

  1505. 

  1506.     s->picture.reference = 0;

  1507.     if (avctx->get_buffer(avctx, &s->picture) < 0)

  1508.     {

  1509.         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");

  1510.         return -1;

  1511.     }

  1512. 

  1513.     s->picture.pict_type = I_TYPE;

  1514.     s->picture.key_frame = 1;

  1515. 

  1516.     for (i = 0; i < 3; i++)

  1517.         s->linesize[i] = s->picture.linesize[i] << s->interlaced;

  1518. 

  1519.     /* DQT */

  1520.     for (i = 0; i < 64; i++)

  1521.     {

  1522.         j = s->scantable.permutated[i];

  1523.         s->quant_matrixes[0][j] = sp5x_quant_table[(qscale * 2) + i];

  1524.     }

  1525.     s->qscale[0] = FFMAX(

  1526.         s->quant_matrixes[0][s->scantable.permutated[1]],

  1527.         s->quant_matrixes[0][s->scantable.permutated[8]]) >> 1;

  1528. 

  1529.     for (i = 0; i < 64; i++)

  1530.     {

  1531.         j = s->scantable.permutated[i];

  1532.         s->quant_matrixes[1][j] = sp5x_quant_table[(qscale * 2) + 1 + i];

  1533.     }

  1534.     s->qscale[1] = FFMAX(

  1535.         s->quant_matrixes[1][s->scantable.permutated[1]],

  1536.         s->quant_matrixes[1][s->scantable.permutated[8]]) >> 1;

  1537. 

  1538.     /* DHT */

  1539. 

  1540.     /* SOS */

  1541.     s->comp_index[0] = 0;

  1542.     s->nb_blocks[0] = s->h_count[0] * s->v_count[0];

  1543.     s->h_scount[0] = s->h_count[0];

  1544.     s->v_scount[0] = s->v_count[0];

  1545.     s->dc_index[0] = 0;

  1546.     s->ac_index[0] = 0;

  1547. 

  1548.     s->comp_index[1] = 1;

  1549.     s->nb_blocks[1] = s->h_count[1] * s->v_count[1];

  1550.     s->h_scount[1] = s->h_count[1];

  1551.     s->v_scount[1] = s->v_count[1];

  1552.     s->dc_index[1] = 1;

  1553.     s->ac_index[1] = 1;

  1554. 

  1555.     s->comp_index[2] = 2;

  1556.     s->nb_blocks[2] = s->h_count[2] * s->v_count[2];

  1557.     s->h_scount[2] = s->h_count[2];

  1558.     s->v_scount[2] = s->v_count[2];

  1559.     s->dc_index[2] = 1;

  1560.     s->ac_index[2] = 1;

  1561. 

  1562.     for (i = 0; i < 3; i++)

  1563.         s->last_dc[i] = 1024;

  1564. 

  1565.     s->mb_width = (s->width * s->h_max * 8 -1) / (s->h_max * 8);

  1566.     s->mb_height = (s->height * s->v_max * 8 -1) / (s->v_max * 8);

  1567. 

  1568.     init_get_bits(&s->gb, buf+14, (buf_size-14)*8);

  1569. 

  1570.     return mjpeg_decode_scan(s);

  1571. #endif

  1572. 

  1573.     return i;

  1574. }

  1575. 

  1576. int ff_mjpeg_decode_end(AVCodecContext *avctx)

  1577. {

  1578.     MJpegDecodeContext *s = avctx->priv_data;

  1579.     int i, j;

  1580. 

  1581.     av_free(s->buffer);

  1582.     av_free(s->qscale_table);

  1583. 

  1584.     for(i=0;i<2;i++) {

  1585.         for(j=0;j<4;j++)

  1586.             free_vlc(&s->vlcs[i][j]);

  1587.     }

  1588.     return 0;

  1589. }

  1590. 

  1591. AVCodec mjpeg_decoder = {

  1592.     "mjpeg",

  1593.     CODEC_TYPE_VIDEO,

  1594.     CODEC_ID_MJPEG,

  1595.     sizeof(MJpegDecodeContext),

  1596.     ff_mjpeg_decode_init,

  1597.     NULL,

  1598.     ff_mjpeg_decode_end,

  1599.     ff_mjpeg_decode_frame,

  1600.     CODEC_CAP_DR1,

  1601.     NULL

  1602. };

  1603. 

  1604. AVCodec thp_decoder = {

  1605.     "thp",

  1606.     CODEC_TYPE_VIDEO,

  1607.     CODEC_ID_THP,

  1608.     sizeof(MJpegDecodeContext),

  1609.     ff_mjpeg_decode_init,

  1610.     NULL,

  1611.     ff_mjpeg_decode_end,

  1612.     ff_mjpeg_decode_frame,

  1613.     CODEC_CAP_DR1,

  1614.     NULL

  1615. };

  1616. 

  1617. AVCodec mjpegb_decoder = {

  1618.     "mjpegb",

  1619.     CODEC_TYPE_VIDEO,

  1620.     CODEC_ID_MJPEGB,

  1621.     sizeof(MJpegDecodeContext),

  1622.     ff_mjpeg_decode_init,

  1623.     NULL,

  1624.     ff_mjpeg_decode_end,

  1625.     mjpegb_decode_frame,

  1626.     CODEC_CAP_DR1,

  1627.     NULL

  1628. };

  1629. 

  1630. AVCodec sp5x_decoder = {

  1631.     "sp5x",

  1632.     CODEC_TYPE_VIDEO,

  1633.     CODEC_ID_SP5X,

  1634.     sizeof(MJpegDecodeContext),

  1635.     ff_mjpeg_decode_init,

  1636.     NULL,

  1637.     ff_mjpeg_decode_end,

  1638.     sp5x_decode_frame,

  1639.     CODEC_CAP_DR1,

  1640.     NULL

  1641. };