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FFmpeg/libavcodec/ivi_common.c

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  1. /*

  2.  * common functions for Indeo Video Interactive codecs (Indeo4 and Indeo5)

  3.  *

  4.  * Copyright (c) 2009 Maxim Poliakovski

  5.  *

  6.  * This file is part of FFmpeg.

  7.  *

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

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

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

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

  12.  *

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

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

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

  16.  * Lesser General Public License for more details.

  17.  *

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

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

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

  21.  */

  22. 

  23. /**

  24.  * @file

  25.  * This file contains functions and data shared by both Indeo4 and

  26.  * Indeo5 decoders.

  27.  */

  28. 

  29. #define BITSTREAM_READER_LE

  30. #include "libavutil/attributes.h"

  31. #include "avcodec.h"

  32. #include "get_bits.h"

  33. #include "internal.h"

  34. #include "mathops.h"

  35. #include "ivi_common.h"

  36. #include "ivi_dsp.h"

  37. 

  38. extern const IVIHuffDesc ff_ivi_mb_huff_desc[8];  ///< static macroblock huffman tables

  39. extern const IVIHuffDesc ff_ivi_blk_huff_desc[8]; ///< static block huffman tables

  40. 

  41. static VLC ivi_mb_vlc_tabs [8]; ///< static macroblock Huffman tables

  42. static VLC ivi_blk_vlc_tabs[8]; ///< static block Huffman tables

  43. 

  44. /**

  45.  *  Reverse "nbits" bits of the value "val" and return the result

  46.  *  in the least significant bits.

  47.  */

  48. static uint16_t inv_bits(uint16_t val, int nbits)

  49. {

  50.     uint16_t res;

  51. 

  52.     if (nbits <= 8) {

  53.         res = ff_reverse[val] >> (8-nbits);

  54.     } else

  55.         res = ((ff_reverse[val & 0xFF] << 8) + (ff_reverse[val >> 8])) >> (16-nbits);

  56. 

  57.     return res;

  58. }

  59. 

  60. /*

  61.  *  Generate a huffman codebook from the given descriptor

  62.  *  and convert it into the FFmpeg VLC table.

  63.  *

  64.  *  @param[in]   cb    pointer to codebook descriptor

  65.  *  @param[out]  vlc   where to place the generated VLC table

  66.  *  @param[in]   flag  flag: 1 - for static or 0 for dynamic tables

  67.  *  @return     result code: 0 - OK, -1 = error (invalid codebook descriptor)

  68.  */

  69. static int ivi_create_huff_from_desc(const IVIHuffDesc *cb, VLC *vlc, int flag)

  70. {

  71.     int         pos, i, j, codes_per_row, prefix, not_last_row;

  72.     uint16_t    codewords[256]; /* FIXME: move this temporal storage out? */

  73.     uint8_t     bits[256];

  74. 

  75.     pos = 0; /* current position = 0 */

  76. 

  77.     for (i = 0; i < cb->num_rows; i++) {

  78.         codes_per_row = 1 << cb->xbits[i];

  79.         not_last_row  = (i != cb->num_rows - 1);

  80.         prefix        = ((1 << i) - 1) << (cb->xbits[i] + not_last_row);

  81. 

  82.         for (j = 0; j < codes_per_row; j++) {

  83.             if (pos >= 256) /* Some Indeo5 codebooks can have more than 256 */

  84.                 break;      /* elements, but only 256 codes are allowed! */

  85. 

  86.             bits[pos] = i + cb->xbits[i] + not_last_row;

  87.             if (bits[pos] > IVI_VLC_BITS)

  88.                 return -1; /* invalid descriptor */

  89. 

  90.             codewords[pos] = inv_bits((prefix | j), bits[pos]);

  91.             if (!bits[pos])

  92.                 bits[pos] = 1;

  93. 

  94.             pos++;

  95.         }//for j

  96.     }//for i

  97. 

  98.     /* number of codewords = pos */

  99.     return init_vlc(vlc, IVI_VLC_BITS, pos, bits, 1, 1, codewords, 2, 2,

  100.                     (flag ? INIT_VLC_USE_NEW_STATIC : 0) | INIT_VLC_LE);

  101. }

  102. 

  103. void ff_ivi_init_static_vlc(void)

  104. {

  105.     int i;

  106.     static VLC_TYPE table_data[8192 * 16][2];

  107.     static int initialized_vlcs = 0;

  108. 

  109.     if (initialized_vlcs)

  110.         return;

  111.     for (i = 0; i < 8; i++) {

  112.         ivi_mb_vlc_tabs[i].table = table_data + i * 2 * 8192;

  113.         ivi_mb_vlc_tabs[i].table_allocated = 8192;

  114.         ivi_create_huff_from_desc(&ff_ivi_mb_huff_desc[i],  &ivi_mb_vlc_tabs[i],  1);

  115.         ivi_blk_vlc_tabs[i].table = table_data + (i * 2 + 1) * 8192;

  116.         ivi_blk_vlc_tabs[i].table_allocated = 8192;

  117.         ivi_create_huff_from_desc(&ff_ivi_blk_huff_desc[i], &ivi_blk_vlc_tabs[i], 1);

  118.     }

  119.     initialized_vlcs = 1;

  120. }

  121. 

  122. /*

  123.  *  Copy huffman codebook descriptors.

  124.  *

  125.  *  @param[out]  dst  ptr to the destination descriptor

  126.  *  @param[in]   src  ptr to the source descriptor

  127.  */

  128. static void ivi_huff_desc_copy(IVIHuffDesc *dst, const IVIHuffDesc *src)

  129. {

  130.     dst->num_rows = src->num_rows;

  131.     memcpy(dst->xbits, src->xbits, src->num_rows);

  132. }

  133. 

  134. /*

  135.  *  Compare two huffman codebook descriptors.

  136.  *

  137.  *  @param[in]  desc1  ptr to the 1st descriptor to compare

  138.  *  @param[in]  desc2  ptr to the 2nd descriptor to compare

  139.  *  @return         comparison result: 0 - equal, 1 - not equal

  140.  */

  141. static int ivi_huff_desc_cmp(const IVIHuffDesc *desc1, const IVIHuffDesc *desc2)

  142. {

  143.     return    desc1->num_rows != desc2->num_rows

  144.            || memcmp(desc1->xbits, desc2->xbits, desc1->num_rows);

  145. }

  146. 

  147. int ff_ivi_dec_huff_desc(GetBitContext *gb, int desc_coded, int which_tab,

  148.                          IVIHuffTab *huff_tab, AVCodecContext *avctx)

  149. {

  150.     int         i, result;

  151.     IVIHuffDesc new_huff;

  152. 

  153.     if (!desc_coded) {

  154.         /* select default table */

  155.         huff_tab->tab = (which_tab) ? &ivi_blk_vlc_tabs[7]

  156.             : &ivi_mb_vlc_tabs [7];

  157.     } else {

  158.         huff_tab->tab_sel = get_bits(gb, 3);

  159.         if (huff_tab->tab_sel == 7) {

  160.             /* custom huffman table (explicitly encoded) */

  161.             new_huff.num_rows = get_bits(gb, 4);

  162.             if (!new_huff.num_rows) {

  163.                 av_log(avctx, AV_LOG_ERROR, "Empty custom Huffman table!\n");

  164.                 return AVERROR_INVALIDDATA;

  165.             }

  166. 

  167.             for (i = 0; i < new_huff.num_rows; i++)

  168.                 new_huff.xbits[i] = get_bits(gb, 4);

  169. 

  170.             /* Have we got the same custom table? Rebuild if not. */

  171.             if (ivi_huff_desc_cmp(&new_huff, &huff_tab->cust_desc) || !huff_tab->cust_tab.table) {

  172.                 ivi_huff_desc_copy(&huff_tab->cust_desc, &new_huff);

  173. 

  174.                 if (huff_tab->cust_tab.table)

  175.                     ff_free_vlc(&huff_tab->cust_tab);

  176.                 result = ivi_create_huff_from_desc(&huff_tab->cust_desc,

  177.                         &huff_tab->cust_tab, 0);

  178.                 if (result) {

  179.                     huff_tab->cust_desc.num_rows = 0; // reset faulty description

  180.                     av_log(avctx, AV_LOG_ERROR,

  181.                            "Error while initializing custom vlc table!\n");

  182.                     return result;

  183.                 }

  184.             }

  185.             huff_tab->tab = &huff_tab->cust_tab;

  186.         } else {

  187.             /* select one of predefined tables */

  188.             huff_tab->tab = (which_tab) ? &ivi_blk_vlc_tabs[huff_tab->tab_sel]

  189.                 : &ivi_mb_vlc_tabs [huff_tab->tab_sel];

  190.         }

  191.     }

  192. 

  193.     return 0;

  194. }

  195. 

  196. /*

  197.  *  Free planes, bands and macroblocks buffers.

  198.  *

  199.  *  @param[in]  planes  pointer to the array of the plane descriptors

  200.  */

  201. static av_cold void ivi_free_buffers(IVIPlaneDesc *planes)

  202. {

  203.     int p, b, t;

  204. 

  205.     for (p = 0; p < 3; p++) {

  206.         if (planes[p].bands)

  207.         for (b = 0; b < planes[p].num_bands; b++) {

  208.             av_freep(&planes[p].bands[b].bufs[0]);

  209.             av_freep(&planes[p].bands[b].bufs[1]);

  210.             av_freep(&planes[p].bands[b].bufs[2]);

  211. 

  212.             if (planes[p].bands[b].blk_vlc.cust_tab.table)

  213.                 ff_free_vlc(&planes[p].bands[b].blk_vlc.cust_tab);

  214.             for (t = 0; t < planes[p].bands[b].num_tiles; t++)

  215.                 av_freep(&planes[p].bands[b].tiles[t].mbs);

  216.             av_freep(&planes[p].bands[b].tiles);

  217.         }

  218.         av_freep(&planes[p].bands);

  219.     }

  220. }

  221. 

  222. av_cold int ff_ivi_init_planes(IVIPlaneDesc *planes, const IVIPicConfig *cfg)

  223. {

  224.     int         p, b;

  225.     uint32_t    b_width, b_height, align_fac, width_aligned, height_aligned, buf_size;

  226.     IVIBandDesc *band;

  227. 

  228.     ivi_free_buffers(planes);

  229. 

  230.     /* fill in the descriptor of the luminance plane */

  231.     planes[0].width     = cfg->pic_width;

  232.     planes[0].height    = cfg->pic_height;

  233.     planes[0].num_bands = cfg->luma_bands;

  234. 

  235.     /* fill in the descriptors of the chrominance planes */

  236.     planes[1].width     = planes[2].width     = (cfg->pic_width  + 3) >> 2;

  237.     planes[1].height    = planes[2].height    = (cfg->pic_height + 3) >> 2;

  238.     planes[1].num_bands = planes[2].num_bands = cfg->chroma_bands;

  239. 

  240.     for (p = 0; p < 3; p++) {

  241.         planes[p].bands = av_mallocz(planes[p].num_bands * sizeof(IVIBandDesc));

  242.         if (!planes[p].bands)

  243.             return AVERROR(ENOMEM);

  244. 

  245.         /* select band dimensions: if there is only one band then it

  246.          *  has the full size, if there are several bands each of them

  247.          *  has only half size */

  248.         b_width  = planes[p].num_bands == 1 ? planes[p].width  : (planes[p].width  + 1) >> 1;

  249.         b_height = planes[p].num_bands == 1 ? planes[p].height : (planes[p].height + 1) >> 1;

  250. 

  251.         /* luma   band buffers will be aligned on 16x16 (max macroblock size) */

  252.         /* chroma band buffers will be aligned on   8x8 (max macroblock size) */

  253.         align_fac       = p ? 8 : 16;

  254.         width_aligned   = FFALIGN(b_width , align_fac);

  255.         height_aligned  = FFALIGN(b_height, align_fac);

  256.         buf_size        = width_aligned * height_aligned * sizeof(int16_t);

  257. 

  258.         for (b = 0; b < planes[p].num_bands; b++) {

  259.             band = &planes[p].bands[b]; /* select appropriate plane/band */

  260.             band->plane    = p;

  261.             band->band_num = b;

  262.             band->width    = b_width;

  263.             band->height   = b_height;

  264.             band->pitch    = width_aligned;

  265.             band->aheight  = height_aligned;

  266.             band->bufs[0]  = av_mallocz(buf_size);

  267.             band->bufs[1]  = av_mallocz(buf_size);

  268.             band->bufsize  = buf_size/2;

  269.             if (!band->bufs[0] || !band->bufs[1])

  270.                 return AVERROR(ENOMEM);

  271. 

  272.             /* allocate the 3rd band buffer for scalability mode */

  273.             if (cfg->luma_bands > 1) {

  274.                 band->bufs[2] = av_mallocz(buf_size);

  275.                 if (!band->bufs[2])

  276.                     return AVERROR(ENOMEM);

  277.             }

  278. 

  279.             planes[p].bands[0].blk_vlc.cust_desc.num_rows = 0; /* reset custom vlc */

  280.         }

  281.     }

  282. 

  283.     return 0;

  284. }

  285. 

  286. av_cold int ff_ivi_init_tiles(IVIPlaneDesc *planes, int tile_width, int tile_height)

  287. {

  288.     int         p, b, x, y, x_tiles, y_tiles, t_width, t_height;

  289.     IVIBandDesc *band;

  290.     IVITile     *tile, *ref_tile;

  291. 

  292.     for (p = 0; p < 3; p++) {

  293.         t_width  = !p ? tile_width  : (tile_width  + 3) >> 2;

  294.         t_height = !p ? tile_height : (tile_height + 3) >> 2;

  295. 

  296.         if (!p && planes[0].num_bands == 4) {

  297.             t_width  >>= 1;

  298.             t_height >>= 1;

  299.         }

  300.         if(t_width<=0 || t_height<=0)

  301.             return AVERROR(EINVAL);

  302. 

  303.         for (b = 0; b < planes[p].num_bands; b++) {

  304.             band = &planes[p].bands[b];

  305.             x_tiles = IVI_NUM_TILES(band->width, t_width);

  306.             y_tiles = IVI_NUM_TILES(band->height, t_height);

  307.             band->num_tiles = x_tiles * y_tiles;

  308. 

  309.             av_freep(&band->tiles);

  310.             band->tiles = av_mallocz(band->num_tiles * sizeof(IVITile));

  311.             if (!band->tiles)

  312.                 return AVERROR(ENOMEM);

  313. 

  314.             tile = band->tiles;

  315. 

  316.             /* use the first luma band as reference for motion vectors

  317.              * and quant */

  318.             ref_tile = planes[0].bands[0].tiles;

  319. 

  320.             for (y = 0; y < band->height; y += t_height) {

  321.                 for (x = 0; x < band->width; x += t_width) {

  322.                     tile->xpos     = x;

  323.                     tile->ypos     = y;

  324.                     tile->mb_size  = band->mb_size;

  325.                     tile->width    = FFMIN(band->width - x,  t_width);

  326.                     tile->height   = FFMIN(band->height - y, t_height);

  327.                     tile->is_empty = tile->data_size = 0;

  328.                     /* calculate number of macroblocks */

  329.                     tile->num_MBs  = IVI_MBs_PER_TILE(tile->width, tile->height,

  330.                                                       band->mb_size);

  331. 

  332.                     av_freep(&tile->mbs);

  333.                     tile->mbs = av_malloc(tile->num_MBs * sizeof(IVIMbInfo));

  334.                     if (!tile->mbs)

  335.                         return AVERROR(ENOMEM);

  336. 

  337.                     tile->ref_mbs = 0;

  338.                     if (p || b) {

  339.                         if (tile->num_MBs <= ref_tile->num_MBs) {

  340.                             tile->ref_mbs = ref_tile->mbs;

  341.                         }else

  342.                             av_log(NULL, AV_LOG_DEBUG, "Cannot use ref_tile, too few mbs\n");

  343.                         ref_tile++;

  344.                     }

  345. 

  346.                     tile++;

  347.                 }

  348.             }

  349. 

  350.         }// for b

  351.     }// for p

  352. 

  353.     return 0;

  354. }

  355. 

  356. /*

  357.  *  Decode size of the tile data.

  358.  *  The size is stored as a variable-length field having the following format:

  359.  *  if (tile_data_size < 255) than this field is only one byte long

  360.  *  if (tile_data_size >= 255) than this field four is byte long: 0xFF X1 X2 X3

  361.  *  where X1-X3 is size of the tile data

  362.  *

  363.  *  @param[in,out]  gb  the GetBit context

  364.  *  @return     size of the tile data in bytes

  365.  */

  366. static int ivi_dec_tile_data_size(GetBitContext *gb)

  367. {

  368.     int    len;

  369. 

  370.     len = 0;

  371.     if (get_bits1(gb)) {

  372.         len = get_bits(gb, 8);

  373.         if (len == 255)

  374.             len = get_bits_long(gb, 24);

  375.     }

  376. 

  377.     /* align the bitstream reader on the byte boundary */

  378.     align_get_bits(gb);

  379. 

  380.     return len;

  381. }

  382. 

  383. /*

  384.  *  Decode block data:

  385.  *  extract huffman-coded transform coefficients from the bitstream,

  386.  *  dequantize them, apply inverse transform and motion compensation

  387.  *  in order to reconstruct the picture.

  388.  *

  389.  *  @param[in,out]  gb    the GetBit context

  390.  *  @param[in]      band  pointer to the band descriptor

  391.  *  @param[in]      tile  pointer to the tile descriptor

  392.  *  @return     result code: 0 - OK, -1 = error (corrupted blocks data)

  393.  */

  394. static int ivi_decode_blocks(GetBitContext *gb, IVIBandDesc *band, IVITile *tile,

  395.                              AVCodecContext *avctx)

  396. {

  397.     int         mbn, blk, num_blocks, num_coeffs, blk_size, scan_pos, run, val,

  398.                 pos, is_intra, mc_type = 0, av_uninit(mv_x), av_uninit(mv_y), col_mask;

  399.     uint8_t     col_flags[8];

  400.     int32_t     prev_dc, trvec[64];

  401.     uint32_t    cbp, av_uninit(sym), lo, hi, quant, buf_offs, q;

  402.     IVIMbInfo   *mb;

  403.     RVMapDesc   *rvmap = band->rv_map;

  404.     void (*mc_with_delta_func)(int16_t *buf, const int16_t *ref_buf, uint32_t pitch, int mc_type);

  405.     void (*mc_no_delta_func)  (int16_t *buf, const int16_t *ref_buf, uint32_t pitch, int mc_type);

  406.     const uint16_t  *base_tab;

  407.     const uint8_t   *scale_tab;

  408. 

  409.     prev_dc = 0; /* init intra prediction for the DC coefficient */

  410. 

  411.     blk_size   = band->blk_size;

  412.     col_mask   = blk_size - 1; /* column mask for tracking non-zero coeffs */

  413.     num_blocks = (band->mb_size != blk_size) ? 4 : 1; /* number of blocks per mb */

  414.     num_coeffs = blk_size * blk_size;

  415.     if (blk_size == 8) {

  416.         mc_with_delta_func = ff_ivi_mc_8x8_delta;

  417.         mc_no_delta_func   = ff_ivi_mc_8x8_no_delta;

  418.     } else {

  419.         mc_with_delta_func = ff_ivi_mc_4x4_delta;

  420.         mc_no_delta_func   = ff_ivi_mc_4x4_no_delta;

  421.     }

  422. 

  423.     for (mbn = 0, mb = tile->mbs; mbn < tile->num_MBs; mb++, mbn++) {

  424.         is_intra = !mb->type;

  425.         cbp      = mb->cbp;

  426.         buf_offs = mb->buf_offs;

  427. 

  428.         quant = av_clip(band->glob_quant + mb->q_delta, 0, 23);

  429. 

  430.         base_tab  = is_intra ? band->intra_base  : band->inter_base;

  431.         scale_tab = is_intra ? band->intra_scale : band->inter_scale;

  432.         if (scale_tab)

  433.             quant = scale_tab[quant];

  434. 

  435.         if (!is_intra) {

  436.             mv_x = mb->mv_x;

  437.             mv_y = mb->mv_y;

  438.             if (band->is_halfpel) {

  439.                 mc_type = ((mv_y & 1) << 1) | (mv_x & 1);

  440.                 mv_x >>= 1;

  441.                 mv_y >>= 1; /* convert halfpel vectors into fullpel ones */

  442.             }

  443.             if (mb->type) {

  444.                 int dmv_x, dmv_y, cx, cy;

  445. 

  446.                 dmv_x = mb->mv_x >> band->is_halfpel;

  447.                 dmv_y = mb->mv_y >> band->is_halfpel;

  448.                 cx    = mb->mv_x &  band->is_halfpel;

  449.                 cy    = mb->mv_y &  band->is_halfpel;

  450. 

  451.                 if (   mb->xpos + dmv_x < 0

  452.                     || mb->xpos + dmv_x + band->mb_size + cx > band->pitch

  453.                     || mb->ypos + dmv_y < 0

  454.                     || mb->ypos + dmv_y + band->mb_size + cy > band->aheight) {

  455.                     return AVERROR_INVALIDDATA;

  456.                 }

  457.             }

  458.         }

  459. 

  460.         for (blk = 0; blk < num_blocks; blk++) {

  461.             /* adjust block position in the buffer according to its number */

  462.             if (blk & 1) {

  463.                 buf_offs += blk_size;

  464.             } else if (blk == 2) {

  465.                 buf_offs -= blk_size;

  466.                 buf_offs += blk_size * band->pitch;

  467.             }

  468. 

  469.             if (cbp & 1) { /* block coded ? */

  470.                 if (!band->scan) {

  471.                     av_log(avctx, AV_LOG_ERROR, "Scan pattern is not set.\n");

  472.                     return AVERROR_INVALIDDATA;

  473.                 }

  474. 

  475.                 scan_pos = -1;

  476.                 memset(trvec, 0, num_coeffs*sizeof(trvec[0])); /* zero transform vector */

  477.                 memset(col_flags, 0, sizeof(col_flags));      /* zero column flags */

  478. 

  479.                 while (scan_pos <= num_coeffs) {

  480.                     sym = get_vlc2(gb, band->blk_vlc.tab->table, IVI_VLC_BITS, 1);

  481.                     if (sym == rvmap->eob_sym)

  482.                         break; /* End of block */

  483. 

  484.                     if (sym == rvmap->esc_sym) { /* Escape - run/val explicitly coded using 3 vlc codes */

  485.                         run = get_vlc2(gb, band->blk_vlc.tab->table, IVI_VLC_BITS, 1) + 1;

  486.                         lo  = get_vlc2(gb, band->blk_vlc.tab->table, IVI_VLC_BITS, 1);

  487.                         hi  = get_vlc2(gb, band->blk_vlc.tab->table, IVI_VLC_BITS, 1);

  488.                         val = IVI_TOSIGNED((hi << 6) | lo); /* merge them and convert into signed val */

  489.                     } else {

  490.                         if (sym >= 256U) {

  491.                             av_log(avctx, AV_LOG_ERROR, "Invalid sym encountered: %d.\n", sym);

  492.                             return -1;

  493.                         }

  494.                         run = rvmap->runtab[sym];

  495.                         val = rvmap->valtab[sym];

  496.                     }

  497. 

  498.                     /* de-zigzag and dequantize */

  499.                     scan_pos += run;

  500.                     if (scan_pos >= (unsigned)num_coeffs)

  501.                         break;

  502.                     pos = band->scan[scan_pos];

  503. 

  504.                     if (!val)

  505.                         av_dlog(avctx, "Val = 0 encountered!\n");

  506. 

  507.                     q = (base_tab[pos] * quant) >> 9;

  508.                     if (q > 1)

  509.                         val = val * q + FFSIGN(val) * (((q ^ 1) - 1) >> 1);

  510.                     trvec[pos] = val;

  511.                     col_flags[pos & col_mask] |= !!val; /* track columns containing non-zero coeffs */

  512.                 }// while

  513. 

  514.                 if (scan_pos >= num_coeffs && sym != rvmap->eob_sym)

  515.                     return -1; /* corrupt block data */

  516. 

  517.                 /* undoing DC coeff prediction for intra-blocks */

  518.                 if (is_intra && band->is_2d_trans) {

  519.                     prev_dc      += trvec[0];

  520.                     trvec[0]      = prev_dc;

  521.                     col_flags[0] |= !!prev_dc;

  522.                 }

  523.                 if(band->transform_size > band->blk_size){

  524.                     av_log(NULL, AV_LOG_ERROR, "Too large transform\n");

  525.                     return AVERROR_INVALIDDATA;

  526.                 }

  527.                 /* apply inverse transform */

  528.                 band->inv_transform(trvec, band->buf + buf_offs,

  529.                                     band->pitch, col_flags);

  530. 

  531.                 /* apply motion compensation */

  532.                 if (!is_intra)

  533.                     mc_with_delta_func(band->buf + buf_offs,

  534.                                        band->ref_buf + buf_offs + mv_y * band->pitch + mv_x,

  535.                                        band->pitch, mc_type);

  536.             } else {

  537.                 /* block not coded */

  538.                 /* for intra blocks apply the dc slant transform */

  539.                 /* for inter - perform the motion compensation without delta */

  540.                 if (is_intra) {

  541.                     band->dc_transform(&prev_dc, band->buf + buf_offs,

  542.                                        band->pitch, blk_size);

  543.                 } else

  544.                     mc_no_delta_func(band->buf + buf_offs,

  545.                                      band->ref_buf + buf_offs + mv_y * band->pitch + mv_x,

  546.                                      band->pitch, mc_type);

  547.             }

  548. 

  549.             cbp >>= 1;

  550.         }// for blk

  551.     }// for mbn

  552. 

  553.     align_get_bits(gb);

  554. 

  555.     return 0;

  556. }

  557. 

  558. /**

  559.  *  Handle empty tiles by performing data copying and motion

  560.  *  compensation respectively.

  561.  *

  562.  *  @param[in]  avctx     ptr to the AVCodecContext

  563.  *  @param[in]  band      pointer to the band descriptor

  564.  *  @param[in]  tile      pointer to the tile descriptor

  565.  *  @param[in]  mv_scale  scaling factor for motion vectors

  566.  */

  567. static int ivi_process_empty_tile(AVCodecContext *avctx, IVIBandDesc *band,

  568.                                   IVITile *tile, int32_t mv_scale)

  569. {

  570.     int             x, y, need_mc, mbn, blk, num_blocks, mv_x, mv_y, mc_type;

  571.     int             offs, mb_offset, row_offset;

  572.     IVIMbInfo       *mb, *ref_mb;

  573.     const int16_t   *src;

  574.     int16_t         *dst;

  575.     void (*mc_no_delta_func)(int16_t *buf, const int16_t *ref_buf, uint32_t pitch,

  576.                              int mc_type);

  577. 

  578.     if (tile->num_MBs != IVI_MBs_PER_TILE(tile->width, tile->height, band->mb_size)) {

  579.         av_log(avctx, AV_LOG_ERROR, "Allocated tile size %d mismatches "

  580.                "parameters %d in ivi_process_empty_tile()\n",

  581.                tile->num_MBs, IVI_MBs_PER_TILE(tile->width, tile->height, band->mb_size));

  582.         return AVERROR_INVALIDDATA;

  583.     }

  584. 

  585.     offs       = tile->ypos * band->pitch + tile->xpos;

  586.     mb         = tile->mbs;

  587.     ref_mb     = tile->ref_mbs;

  588.     row_offset = band->mb_size * band->pitch;

  589.     need_mc    = 0; /* reset the mc tracking flag */

  590. 

  591.     for (y = tile->ypos; y < (tile->ypos + tile->height); y += band->mb_size) {

  592.         mb_offset = offs;

  593. 

  594.         for (x = tile->xpos; x < (tile->xpos + tile->width); x += band->mb_size) {

  595.             mb->xpos     = x;

  596.             mb->ypos     = y;

  597.             mb->buf_offs = mb_offset;

  598. 

  599.             mb->type = 1; /* set the macroblocks type = INTER */

  600.             mb->cbp  = 0; /* all blocks are empty */

  601. 

  602.             if (!band->qdelta_present && !band->plane && !band->band_num) {

  603.                 mb->q_delta = band->glob_quant;

  604.                 mb->mv_x    = 0;

  605.                 mb->mv_y    = 0;

  606.             }

  607. 

  608.             if (band->inherit_qdelta && ref_mb)

  609.                 mb->q_delta = ref_mb->q_delta;

  610. 

  611.             if (band->inherit_mv && ref_mb) {

  612.                 /* motion vector inheritance */

  613.                 if (mv_scale) {

  614.                     mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale);

  615.                     mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale);

  616.                 } else {

  617.                     mb->mv_x = ref_mb->mv_x;

  618.                     mb->mv_y = ref_mb->mv_y;

  619.                 }

  620.                 need_mc |= mb->mv_x || mb->mv_y; /* tracking non-zero motion vectors */

  621.                 {

  622.                     int dmv_x, dmv_y, cx, cy;

  623. 

  624.                     dmv_x = mb->mv_x >> band->is_halfpel;

  625.                     dmv_y = mb->mv_y >> band->is_halfpel;

  626.                     cx    = mb->mv_x &  band->is_halfpel;

  627.                     cy    = mb->mv_y &  band->is_halfpel;

  628. 

  629.                     if (   mb->xpos + dmv_x < 0

  630.                         || mb->xpos + dmv_x + band->mb_size + cx > band->pitch

  631.                         || mb->ypos + dmv_y < 0

  632.                         || mb->ypos + dmv_y + band->mb_size + cy > band->aheight) {

  633.                         av_log(avctx, AV_LOG_ERROR, "MV out of bounds\n");

  634.                         return AVERROR_INVALIDDATA;

  635.                     }

  636.                 }

  637.             }

  638. 

  639.             mb++;

  640.             if (ref_mb)

  641.                 ref_mb++;

  642.             mb_offset += band->mb_size;

  643.         } // for x

  644.         offs += row_offset;

  645.     } // for y

  646. 

  647.     if (band->inherit_mv && need_mc) { /* apply motion compensation if there is at least one non-zero motion vector */

  648.         num_blocks = (band->mb_size != band->blk_size) ? 4 : 1; /* number of blocks per mb */

  649.         mc_no_delta_func = (band->blk_size == 8) ? ff_ivi_mc_8x8_no_delta

  650.                                                  : ff_ivi_mc_4x4_no_delta;

  651. 

  652.         for (mbn = 0, mb = tile->mbs; mbn < tile->num_MBs; mb++, mbn++) {

  653.             mv_x = mb->mv_x;

  654.             mv_y = mb->mv_y;

  655.             if (!band->is_halfpel) {

  656.                 mc_type = 0; /* we have only fullpel vectors */

  657.             } else {

  658.                 mc_type = ((mv_y & 1) << 1) | (mv_x & 1);

  659.                 mv_x >>= 1;

  660.                 mv_y >>= 1; /* convert halfpel vectors into fullpel ones */

  661.             }

  662. 

  663.             for (blk = 0; blk < num_blocks; blk++) {

  664.                 /* adjust block position in the buffer according with its number */

  665.                 offs = mb->buf_offs + band->blk_size * ((blk & 1) + !!(blk & 2) * band->pitch);

  666.                 mc_no_delta_func(band->buf + offs,

  667.                                  band->ref_buf + offs + mv_y * band->pitch + mv_x,

  668.                                  band->pitch, mc_type);

  669.             }

  670.         }

  671.     } else {

  672.         /* copy data from the reference tile into the current one */

  673.         src = band->ref_buf + tile->ypos * band->pitch + tile->xpos;

  674.         dst = band->buf     + tile->ypos * band->pitch + tile->xpos;

  675.         for (y = 0; y < tile->height; y++) {

  676.             memcpy(dst, src, tile->width*sizeof(band->buf[0]));

  677.             src += band->pitch;

  678.             dst += band->pitch;

  679.         }

  680.     }

  681. 

  682.     return 0;

  683. }

  684. 

  685. 

  686. #ifdef DEBUG

  687. static uint16_t ivi_calc_band_checksum(IVIBandDesc *band)

  688. {

  689.     int         x, y;

  690.     int16_t     *src, checksum;

  691. 

  692.     src = band->buf;

  693.     checksum = 0;

  694. 

  695.     for (y = 0; y < band->height; src += band->pitch, y++)

  696.         for (x = 0; x < band->width; x++)

  697.             checksum += src[x];

  698. 

  699.     return checksum;

  700. }

  701. #endif

  702. 

  703. /*

  704.  *  Convert and output the current plane.

  705.  *  This conversion is done by adding back the bias value of 128

  706.  *  (subtracted in the encoder) and clipping the result.

  707.  *

  708.  *  @param[in]   plane      pointer to the descriptor of the plane being processed

  709.  *  @param[out]  dst        pointer to the buffer receiving converted pixels

  710.  *  @param[in]   dst_pitch  pitch for moving to the next y line

  711.  */

  712. static void ivi_output_plane(IVIPlaneDesc *plane, uint8_t *dst, int dst_pitch)

  713. {

  714.     int             x, y;

  715.     const int16_t   *src  = plane->bands[0].buf;

  716.     uint32_t        pitch = plane->bands[0].pitch;

  717. 

  718.     if (!src)

  719.         return;

  720. 

  721.     for (y = 0; y < plane->height; y++) {

  722.         for (x = 0; x < plane->width; x++)

  723.             dst[x] = av_clip_uint8(src[x] + 128);

  724.         src += pitch;

  725.         dst += dst_pitch;

  726.     }

  727. }

  728. 

  729. /**

  730.  *  Decode an Indeo 4 or 5 band.

  731.  *

  732.  *  @param[in,out]  ctx    ptr to the decoder context

  733.  *  @param[in,out]  band   ptr to the band descriptor

  734.  *  @param[in]      avctx  ptr to the AVCodecContext

  735.  *  @return         result code: 0 = OK, -1 = error

  736.  */

  737. static int decode_band(IVI45DecContext *ctx,

  738.                        IVIBandDesc *band, AVCodecContext *avctx)

  739. {

  740.     int         result, i, t, idx1, idx2, pos;

  741.     IVITile     *tile;

  742. 

  743.     band->buf     = band->bufs[ctx->dst_buf];

  744.     if (!band->buf) {

  745.         av_log(avctx, AV_LOG_ERROR, "Band buffer points to no data!\n");

  746.         return AVERROR_INVALIDDATA;

  747.     }

  748.     band->ref_buf = band->bufs[ctx->ref_buf];

  749.     band->data_ptr = ctx->frame_data + (get_bits_count(&ctx->gb) >> 3);

  750. 

  751.     result = ctx->decode_band_hdr(ctx, band, avctx);

  752.     if (result) {

  753.         av_log(avctx, AV_LOG_ERROR, "Error while decoding band header: %d\n",

  754.                result);

  755.         return result;

  756.     }

  757. 

  758.     if (band->is_empty) {

  759.         av_log(avctx, AV_LOG_ERROR, "Empty band encountered!\n");

  760.         return AVERROR_INVALIDDATA;

  761.     }

  762. 

  763.     band->rv_map = &ctx->rvmap_tabs[band->rvmap_sel];

  764. 

  765.     /* apply corrections to the selected rvmap table if present */

  766.     for (i = 0; i < band->num_corr; i++) {

  767.         idx1 = band->corr[i * 2];

  768.         idx2 = band->corr[i * 2 + 1];

  769.         FFSWAP(uint8_t, band->rv_map->runtab[idx1], band->rv_map->runtab[idx2]);

  770.         FFSWAP(int16_t, band->rv_map->valtab[idx1], band->rv_map->valtab[idx2]);

  771.         if (idx1 == band->rv_map->eob_sym || idx2 == band->rv_map->eob_sym)

  772.             band->rv_map->eob_sym ^= idx1 ^ idx2;

  773.         if (idx1 == band->rv_map->esc_sym || idx2 == band->rv_map->esc_sym)

  774.             band->rv_map->esc_sym ^= idx1 ^ idx2;

  775.     }

  776. 

  777.     pos = get_bits_count(&ctx->gb);

  778. 

  779.     for (t = 0; t < band->num_tiles; t++) {

  780.         tile = &band->tiles[t];

  781. 

  782.         if (tile->mb_size != band->mb_size) {

  783.             av_log(avctx, AV_LOG_ERROR, "MB sizes mismatch: %d vs. %d\n",

  784.                    band->mb_size, tile->mb_size);

  785.             return AVERROR_INVALIDDATA;

  786.         }

  787.         tile->is_empty = get_bits1(&ctx->gb);

  788.         if (tile->is_empty) {

  789.             result = ivi_process_empty_tile(avctx, band, tile,

  790.                                       (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3));

  791.             if (result < 0)

  792.                 break;

  793.             av_dlog(avctx, "Empty tile encountered!\n");

  794.         } else {

  795.             tile->data_size = ivi_dec_tile_data_size(&ctx->gb);

  796.             if (!tile->data_size) {

  797.                 av_log(avctx, AV_LOG_ERROR, "Tile data size is zero!\n");

  798.                 result = AVERROR_INVALIDDATA;

  799.                 break;

  800.             }

  801. 

  802.             result = ctx->decode_mb_info(ctx, band, tile, avctx);

  803.             if (result < 0)

  804.                 break;

  805. 

  806.             result = ivi_decode_blocks(&ctx->gb, band, tile, avctx);

  807.             if (result < 0 || ((get_bits_count(&ctx->gb) - pos) >> 3) != tile->data_size) {

  808.                 av_log(avctx, AV_LOG_ERROR, "Corrupted tile data encountered!\n");

  809.                 break;

  810.             }

  811. 

  812.             pos += tile->data_size << 3; // skip to next tile

  813.         }

  814.     }

  815. 

  816.     /* restore the selected rvmap table by applying its corrections in reverse order */

  817.     for (i = band->num_corr-1; i >= 0; i--) {

  818.         idx1 = band->corr[i*2];

  819.         idx2 = band->corr[i*2+1];

  820.         FFSWAP(uint8_t, band->rv_map->runtab[idx1], band->rv_map->runtab[idx2]);

  821.         FFSWAP(int16_t, band->rv_map->valtab[idx1], band->rv_map->valtab[idx2]);

  822.         if (idx1 == band->rv_map->eob_sym || idx2 == band->rv_map->eob_sym)

  823.             band->rv_map->eob_sym ^= idx1 ^ idx2;

  824.         if (idx1 == band->rv_map->esc_sym || idx2 == band->rv_map->esc_sym)

  825.             band->rv_map->esc_sym ^= idx1 ^ idx2;

  826.     }

  827. 

  828. #ifdef DEBUG

  829.     if (band->checksum_present) {

  830.         uint16_t chksum = ivi_calc_band_checksum(band);

  831.         if (chksum != band->checksum) {

  832.             av_log(avctx, AV_LOG_ERROR,

  833.                    "Band checksum mismatch! Plane %d, band %d, received: %x, calculated: %x\n",

  834.                    band->plane, band->band_num, band->checksum, chksum);

  835.         }

  836.     }

  837. #endif

  838. 

  839.     align_get_bits(&ctx->gb);

  840. 

  841.     return result;

  842. }

  843. 

  844. int ff_ivi_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,

  845.                         AVPacket *avpkt)

  846. {

  847.     IVI45DecContext *ctx = avctx->priv_data;

  848.     const uint8_t   *buf = avpkt->data;

  849.     int             buf_size = avpkt->size;

  850.     int             result, p, b;

  851. 

  852.     init_get_bits(&ctx->gb, buf, buf_size * 8);

  853.     ctx->frame_data = buf;

  854.     ctx->frame_size = buf_size;

  855. 

  856.     result = ctx->decode_pic_hdr(ctx, avctx);

  857.     if (result) {

  858.         av_log(avctx, AV_LOG_ERROR,

  859.                "Error while decoding picture header: %d\n", result);

  860.         return -1;

  861.     }

  862.     if (ctx->gop_invalid)

  863.         return AVERROR_INVALIDDATA;

  864. 

  865.     if (ctx->gop_flags & IVI5_IS_PROTECTED) {

  866.         av_log(avctx, AV_LOG_ERROR, "Password-protected clip!\n");

  867.         return -1;

  868.     }

  869. 

  870.     ctx->switch_buffers(ctx);

  871. 

  872.     //{ START_TIMER;

  873. 

  874.     if (ctx->is_nonnull_frame(ctx)) {

  875.         ctx->buf_invalid[ctx->dst_buf] = 1;

  876.         for (p = 0; p < 3; p++) {

  877.             for (b = 0; b < ctx->planes[p].num_bands; b++) {

  878.                 result = decode_band(ctx, &ctx->planes[p].bands[b], avctx);

  879.                 if (result) {

  880.                     av_log(avctx, AV_LOG_ERROR,

  881.                            "Error while decoding band: %d, plane: %d\n", b, p);

  882.                     return -1;

  883.                 }

  884.             }

  885.         }

  886.         ctx->buf_invalid[ctx->dst_buf] = 0;

  887.     }

  888.     if (ctx->buf_invalid[ctx->dst_buf])

  889.         return -1;

  890. 

  891.     //STOP_TIMER("decode_planes"); }

  892. 

  893.     /* If the bidirectional mode is enabled, next I and the following P frame will */

  894.     /* be sent together. Unfortunately the approach below seems to be the only way */

  895.     /* to handle the B-frames mode. That's exactly the same Intel decoders do.     */

  896.     if (avctx->codec_id == AV_CODEC_ID_INDEO4 && ctx->frame_type == 0/*FRAMETYPE_INTRA*/) {

  897.         while (get_bits(&ctx->gb, 8)); // skip version string

  898.         skip_bits_long(&ctx->gb, 64);  // skip padding, TODO: implement correct 8-bytes alignment

  899.         if (get_bits_left(&ctx->gb) > 18 && show_bits(&ctx->gb, 18) == 0x3FFF8)

  900.             av_log(avctx, AV_LOG_ERROR, "Buffer contains IP frames!\n");

  901.     }

  902. 

  903.     if (!ctx->is_nonnull_frame(ctx))

  904.         return buf_size;

  905. 

  906.     if (ctx->frame.data[0])

  907.         avctx->release_buffer(avctx, &ctx->frame);

  908. 

  909.     ctx->frame.reference = 0;

  910.     avcodec_set_dimensions(avctx, ctx->planes[0].width, ctx->planes[0].height);

  911.     if ((result = ff_get_buffer(avctx, &ctx->frame)) < 0) {

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

  913.         return result;

  914.     }

  915. 

  916.     if (ctx->is_scalable) {

  917.         if (avctx->codec_id == AV_CODEC_ID_INDEO4)

  918.             ff_ivi_recompose_haar(&ctx->planes[0], ctx->frame.data[0], ctx->frame.linesize[0]);

  919.         else

  920.             ff_ivi_recompose53   (&ctx->planes[0], ctx->frame.data[0], ctx->frame.linesize[0]);

  921.     } else {

  922.         ivi_output_plane(&ctx->planes[0], ctx->frame.data[0], ctx->frame.linesize[0]);

  923.     }

  924. 

  925.     ivi_output_plane(&ctx->planes[2], ctx->frame.data[1], ctx->frame.linesize[1]);

  926.     ivi_output_plane(&ctx->planes[1], ctx->frame.data[2], ctx->frame.linesize[2]);

  927. 

  928.     *got_frame = 1;

  929.     *(AVFrame*)data = ctx->frame;

  930. 

  931.     return buf_size;

  932. }

  933. 

  934. /**

  935.  *  Close Indeo5 decoder and clean up its context.

  936.  */

  937. av_cold int ff_ivi_decode_close(AVCodecContext *avctx)

  938. {

  939.     IVI45DecContext *ctx = avctx->priv_data;

  940. 

  941.     ivi_free_buffers(&ctx->planes[0]);

  942. 

  943.     if (ctx->mb_vlc.cust_tab.table)

  944.         ff_free_vlc(&ctx->mb_vlc.cust_tab);

  945. 

  946.     if (ctx->frame.data[0])

  947.         avctx->release_buffer(avctx, &ctx->frame);

  948. 

  949. #if IVI4_STREAM_ANALYSER

  950.     if (avctx->codec_id == AV_CODEC_ID_INDEO4) {

  951.     if (ctx->is_scalable)

  952.         av_log(avctx, AV_LOG_ERROR, "This video uses scalability mode!\n");

  953.     if (ctx->uses_tiling)

  954.         av_log(avctx, AV_LOG_ERROR, "This video uses local decoding!\n");

  955.     if (ctx->has_b_frames)

  956.         av_log(avctx, AV_LOG_ERROR, "This video contains B-frames!\n");

  957.     if (ctx->has_transp)

  958.         av_log(avctx, AV_LOG_ERROR, "Transparency mode is enabled!\n");

  959.     if (ctx->uses_haar)

  960.         av_log(avctx, AV_LOG_ERROR, "This video uses Haar transform!\n");

  961.     if (ctx->uses_fullpel)

  962.         av_log(avctx, AV_LOG_ERROR, "This video uses fullpel motion vectors!\n");

  963.     }

  964. #endif

  965. 

  966.     return 0;

  967. }

  968. 

  969. 

  970. /**

  971.  * These are 2x8 predefined Huffman codebooks for coding macroblock/block

  972.  * signals. They are specified using "huffman descriptors" in order to

  973.  * avoid huge static tables. The decoding tables will be generated at

  974.  * startup from these descriptors.

  975.  */

  976. const IVIHuffDesc ff_ivi_mb_huff_desc[8] = {

  977.     {8,  {0, 4, 5, 4, 4, 4, 6, 6}},

  978.     {12, {0, 2, 2, 3, 3, 3, 3, 5, 3, 2, 2, 2}},

  979.     {12, {0, 2, 3, 4, 3, 3, 3, 3, 4, 3, 2, 2}},

  980.     {12, {0, 3, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2}},

  981.     {13, {0, 4, 4, 3, 3, 3, 3, 2, 3, 3, 2, 1, 1}},

  982.     {9,  {0, 4, 4, 4, 4, 3, 3, 3, 2}},

  983.     {10, {0, 4, 4, 4, 4, 3, 3, 2, 2, 2}},

  984.     {12, {0, 4, 4, 4, 3, 3, 2, 3, 2, 2, 2, 2}}

  985. };

  986. 

  987. const IVIHuffDesc ff_ivi_blk_huff_desc[8] = {

  988.     {10, {1, 2, 3, 4, 4, 7, 5, 5, 4, 1}},

  989.     {11, {2, 3, 4, 4, 4, 7, 5, 4, 3, 3, 2}},

  990.     {12, {2, 4, 5, 5, 5, 5, 6, 4, 4, 3, 1, 1}},

  991.     {13, {3, 3, 4, 4, 5, 6, 6, 4, 4, 3, 2, 1, 1}},

  992.     {11, {3, 4, 4, 5, 5, 5, 6, 5, 4, 2, 2}},

  993.     {13, {3, 4, 5, 5, 5, 5, 6, 4, 3, 3, 2, 1, 1}},

  994.     {13, {3, 4, 5, 5, 5, 6, 5, 4, 3, 3, 2, 1, 1}},

  995.     {9,  {3, 4, 4, 5, 5, 5, 6, 5, 5}}

  996. };

  997. 

  998. 

  999. /**

  1000.  *  Scan patterns shared between indeo4 and indeo5

  1001.  */

  1002. const uint8_t ff_ivi_vertical_scan_8x8[64] = {

  1003.     0,  8, 16, 24, 32, 40, 48, 56,

  1004.     1,  9, 17, 25, 33, 41, 49, 57,

  1005.     2, 10, 18, 26, 34, 42, 50, 58,

  1006.     3, 11, 19, 27, 35, 43, 51, 59,

  1007.     4, 12, 20, 28, 36, 44, 52, 60,

  1008.     5, 13, 21, 29, 37, 45, 53, 61,

  1009.     6, 14, 22, 30, 38, 46, 54, 62,

  1010.     7, 15, 23, 31, 39, 47, 55, 63

  1011. };

  1012. 

  1013. const uint8_t ff_ivi_horizontal_scan_8x8[64] = {

  1014.      0,  1,  2,  3,  4,  5,  6,  7,

  1015.      8,  9, 10, 11, 12, 13, 14, 15,

  1016.     16, 17, 18, 19, 20, 21, 22, 23,

  1017.     24, 25, 26, 27, 28, 29, 30, 31,

  1018.     32, 33, 34, 35, 36, 37, 38, 39,

  1019.     40, 41, 42, 43, 44, 45, 46, 47,

  1020.     48, 49, 50, 51, 52, 53, 54, 55,

  1021.     56, 57, 58, 59, 60, 61, 62, 63

  1022. };

  1023. 

  1024. const uint8_t ff_ivi_direct_scan_4x4[16] = {

  1025.     0, 1, 4, 8, 5, 2, 3, 6, 9, 12, 13, 10, 7, 11, 14, 15

  1026. };

  1027. 

  1028. 

  1029. /**

  1030.  *  Run-value (RLE) tables.

  1031.  */

  1032. const RVMapDesc ff_ivi_rvmap_tabs[9] = {

  1033. {   /* MapTab0 */

  1034.     5, /* eob_sym */

  1035.     2, /* esc_sym */

  1036.     /* run table */

  1037.     {1,  1,  0,  1,  1,  0,  1,  1,  2,  2,  1,  1,  1,  1,  3,  3,

  1038.      1,  1,  2,  2,  1,  1,  4,  4,  1,  1,  1,  1,  2,  2,  5,  5,

  1039.      1,  1,  3,  3,  1,  1,  6,  6,  1,  2,  1,  2,  7,  7,  1,  1,

  1040.      8,  8,  1,  1,  4,  2,  1,  4,  2,  1,  3,  3,  1,  1,  1,  9,

  1041.      9,  1,  2,  1,  2,  1,  5,  5,  1,  1, 10, 10,  1,  1,  3,  3,

  1042.      2,  2,  1,  1, 11, 11,  6,  4,  4,  1,  6,  1,  2,  1,  2, 12,

  1043.      8,  1, 12,  7,  8,  7,  1, 16,  1, 16,  1,  3,  3, 13,  1, 13,

  1044.      2,  2,  1, 15,  1,  5, 14, 15,  1,  5, 14,  1, 17,  8, 17,  8,

  1045.      1,  4,  4,  2,  2,  1, 25, 25, 24, 24,  1,  3,  1,  3,  1,  8,

  1046.      6,  7,  6,  1, 18,  8, 18,  1,  7, 23,  2,  2, 23,  1,  1, 21,

  1047.     22,  9,  9, 22, 19,  1, 21,  5, 19,  5,  1, 33, 20, 33, 20,  8,

  1048.      4,  4,  1, 32,  2,  2,  8,  3, 32, 26,  3,  1,  7,  7, 26,  6,

  1049.      1,  6,  1,  1, 16,  1, 10,  1, 10,  2, 16, 29, 28,  2, 29, 28,

  1050.      1, 27,  5,  8,  5, 27,  1,  8,  3,  7,  3, 31, 41, 31,  1, 41,

  1051.      6,  1,  6,  7,  4,  4,  1,  1,  2,  1,  2, 11, 34, 30, 11,  1,

  1052.     30, 15, 15, 34, 36, 40, 36, 40, 35, 35, 37, 37, 39, 39, 38, 38},

  1053. 

  1054.     /* value table */

  1055.     { 1,  -1,   0,   2,  -2,   0,   3,  -3,   1,  -1,   4,  -4,   5,  -5,   1,  -1,

  1056.       6,  -6,   2,  -2,   7,  -7,   1,  -1,   8,  -8,   9,  -9,   3,  -3,   1,  -1,

  1057.      10, -10,   2,  -2,  11, -11,   1,  -1,  12,   4, -12,  -4,   1,  -1,  13, -13,

  1058.       1,  -1,  14, -14,   2,   5,  15,  -2,  -5, -15,  -3,   3,  16, -16,  17,   1,

  1059.      -1, -17,   6,  18,  -6, -18,   2,  -2,  19, -19,   1,  -1,  20, -20,   4,  -4,

  1060.       7,  -7,  21, -21,   1,  -1,   2,   3,  -3,  22,  -2, -22,   8,  23,  -8,   1,

  1061.       2, -23,  -1,   2,  -2,  -2,  24,   1, -24,  -1,  25,   5,  -5,   1, -25,  -1,

  1062.       9,  -9,  26,   1, -26,   3,   1,  -1,  27,  -3,  -1, -27,   1,   3,  -1,  -3,

  1063.      28,  -4,   4,  10, -10, -28,   1,  -1,   1,  -1,  29,   6, -29,  -6,  30,  -4,

  1064.       3,   3,  -3, -30,   1,   4,  -1,  31,  -3,   1,  11, -11,  -1, -31,  32,  -1,

  1065.      -1,   2,  -2,   1,   1, -32,   1,   4,  -1,  -4,  33,  -1,   1,   1,  -1,   5,

  1066.       5,  -5, -33,  -1, -12,  12,  -5,  -7,   1,   1,   7,  34,   4,  -4,  -1,   4,

  1067.     -34,  -4,  35,  36,  -2, -35,  -2, -36,   2,  13,   2,  -1,   1, -13,   1,  -1,

  1068.      37,   1,  -5,   6,   5,  -1,  38,  -6,  -8,   5,   8,  -1,   1,   1, -37,  -1,

  1069.       5,  39,  -5,  -5,   6,  -6, -38, -39, -14,  40,  14,   2,   1,   1,  -2, -40,

  1070.      -1,  -2,   2,  -1,  -1,  -1,   1,   1,   1,  -1,   1,  -1,   1,  -1,   1,  -1}

  1071. },{

  1072.     /* MapTab1 */

  1073.     0,  /* eob_sym */

  1074.     38, /* esc_sym */

  1075.     /* run table */

  1076.     {0,  1,  1,  2,  2,  3,  3,  4,  4,  5,  5,  6,  8,  6,  8,  7,

  1077.      7,  9,  9, 10, 10, 11, 11,  1, 12,  1, 12, 13, 13, 16, 14, 16,

  1078.     14, 15, 15, 17, 17, 18,  0, 18, 19, 20, 21, 19, 22, 21, 20, 22,

  1079.     25, 24,  2, 25, 24, 23, 23,  2, 26, 28, 26, 28, 29, 27, 29, 27,

  1080.     33, 33,  1, 32,  1,  3, 32, 30, 36,  3, 36, 30, 31, 31, 35, 34,

  1081.     37, 41, 34, 35, 37,  4, 41,  4, 49,  8,  8, 49, 40, 38,  5, 38,

  1082.     40, 39,  5, 39, 42, 43, 42,  7, 57,  6, 43, 44,  6, 50,  7, 44,

  1083.     57, 48, 50, 48, 45, 45, 46, 47, 51, 46, 47, 58,  1, 51, 58,  1,

  1084.     52, 59, 53,  9, 52, 55, 55, 59, 53, 56, 54, 56, 54,  9, 64, 64,

  1085.     60, 63, 60, 63, 61, 62, 61, 62,  2, 10,  2, 10, 11,  1, 11, 13,

  1086.     12,  1, 12, 13, 16, 16,  8,  8, 14,  3,  3, 15, 14, 15,  4,  4,

  1087.      1, 17, 17,  5,  1,  7,  7,  5,  6,  1,  2,  2,  6, 22,  1, 25,

  1088.     21, 22,  8, 24,  1, 21, 25, 24,  8, 18, 18, 23,  9, 20, 23, 33,

  1089.     29, 33, 20,  1, 19,  1, 29, 36,  9, 36, 19, 41, 28, 57, 32,  3,

  1090.     28,  3,  1, 27, 49, 49,  1, 32, 26, 26,  2,  4,  4,  7, 57, 41,

  1091.      2,  7, 10,  5, 37, 16, 10, 27,  8,  8, 13, 16, 37, 13,  1,  5},

  1092. 

  1093.     /* value table */

  1094.     {0,   1,  -1,   1,  -1,   1,  -1,   1,  -1,   1,  -1,   1,   1,  -1,  -1,   1,

  1095.     -1,   1,  -1,   1,  -1,   1,  -1,   2,   1,  -2,  -1,   1,  -1,   1,   1,  -1,

  1096.     -1,   1,  -1,   1,  -1,   1,   0,  -1,   1,   1,   1,  -1,   1,  -1,  -1,  -1,

  1097.      1,   1,   2,  -1,  -1,   1,  -1,  -2,   1,   1,  -1,  -1,   1,   1,  -1,  -1,

  1098.      1,  -1,   3,   1,  -3,   2,  -1,   1,   1,  -2,  -1,  -1,  -1,   1,   1,   1,

  1099.      1,   1,  -1,  -1,  -1,   2,  -1,  -2,   1,   2,  -2,  -1,   1,   1,   2,  -1,

  1100.     -1,   1,  -2,  -1,   1,   1,  -1,   2,   1,   2,  -1,   1,  -2,  -1,  -2,  -1,

  1101.     -1,   1,   1,  -1,   1,  -1,   1,   1,   1,  -1,  -1,   1,   4,  -1,  -1,  -4,

  1102.      1,   1,   1,   2,  -1,  -1,   1,  -1,  -1,   1,  -1,  -1,   1,  -2,   1,  -1,

  1103.      1,   1,  -1,  -1,   1,   1,  -1,  -1,   3,   2,  -3,  -2,   2,   5,  -2,   2,

  1104.      2,  -5,  -2,  -2,  -2,   2,  -3,   3,   2,   3,  -3,   2,  -2,  -2,   3,  -3,

  1105.      6,   2,  -2,   3,  -6,   3,  -3,  -3,   3,   7,  -4,   4,  -3,   2,  -7,   2,

  1106.      2,  -2,  -4,   2,   8,  -2,  -2,  -2,   4,   2,  -2,   2,   3,   2,  -2,  -2,

  1107.      2,   2,  -2,  -8,  -2,   9,  -2,   2,  -3,  -2,   2,  -2,   2,   2,   2,   4,

  1108.     -2,  -4,  10,   2,   2,  -2,  -9,  -2,   2,  -2,   5,   4,  -4,   4,  -2,   2,

  1109.     -5,  -4,  -3,   4,   2,  -3,   3,  -2,  -5,   5,   3,   3,  -2,  -3, -10,  -4}

  1110. },{

  1111.     /* MapTab2 */

  1112.     2,  /* eob_sym */

  1113.     11, /* esc_sym */

  1114.     /* run table */

  1115.     {1,  1,  0,  2,  2,  1,  1,  3,  3,  4,  4,  0,  1,  1,  5,  5,

  1116.      2,  2,  6,  6,  7,  7,  1,  8,  1,  8,  3,  3,  9,  9,  1,  2,

  1117.      2,  1,  4, 10,  4, 10, 11, 11,  1,  5, 12, 12,  1,  5, 13, 13,

  1118.      3,  3,  6,  6,  2,  2, 14, 14, 16, 16, 15,  7, 15,  8,  8,  7,

  1119.      1,  1, 17, 17,  4,  4,  1,  1, 18, 18,  2,  2,  5,  5, 25,  3,

  1120.      9,  3, 25,  9, 19, 24, 19, 24,  1, 21, 20,  1, 21, 22, 20, 22,

  1121.     23, 23,  8,  6, 33,  6,  8, 33,  7,  7, 26, 26,  1, 32,  1, 32,

  1122.     28,  4, 28, 10, 29, 27, 27, 10, 41,  4, 29,  2,  2, 41, 36, 31,

  1123.     49, 31, 34, 30, 34, 36, 30, 35,  1, 49, 11,  5, 35, 11,  1,  3,

  1124.      3,  5, 37, 37,  8, 40,  8, 40, 12, 12, 42, 42,  1, 38, 16, 57,

  1125.      1,  6, 16, 39, 38,  6,  7,  7, 13, 13, 39, 43,  2, 43, 57,  2,

  1126.     50,  9, 44,  9, 50,  4, 15, 48, 44,  4,  1, 15, 48, 14, 14,  1,

  1127.     45, 45,  8,  3,  5,  8, 51, 47,  3, 46, 46, 47,  5, 51,  1, 17,

  1128.     17, 58,  1, 58,  2, 52, 52,  2, 53,  7, 59,  6,  6, 56, 53, 55,

  1129.      7, 55,  1, 54, 59, 56, 54, 10,  1, 10,  4, 60,  1, 60,  8,  4,

  1130.      8, 64, 64, 61,  1, 63,  3, 63, 62, 61,  5, 11,  5,  3, 11, 62},

  1131. 

  1132.     /* value table */

  1133.     { 1,  -1,   0,   1,  -1,   2,  -2,   1,  -1,   1,  -1,   0,   3,  -3,   1,  -1,

  1134.       2,  -2,   1,  -1,   1,  -1,   4,   1,  -4,  -1,   2,  -2,   1,  -1,   5,   3,

  1135.      -3,  -5,   2,   1,  -2,  -1,   1,  -1,   6,   2,   1,  -1,  -6,  -2,   1,  -1,

  1136.       3,  -3,   2,  -2,   4,  -4,   1,  -1,   1,  -1,   1,   2,  -1,   2,  -2,  -2,

  1137.       7,  -7,   1,  -1,   3,  -3,   8,  -8,   1,  -1,   5,  -5,   3,  -3,   1,   4,

  1138.       2,  -4,  -1,  -2,   1,   1,  -1,  -1,   9,   1,   1,  -9,  -1,   1,  -1,  -1,

  1139.       1,  -1,   3,  -3,   1,   3,  -3,  -1,   3,  -3,   1,  -1,  10,   1, -10,  -1,

  1140.       1,   4,  -1,   2,   1,  -1,   1,  -2,   1,  -4,  -1,   6,  -6,  -1,   1,   1,

  1141.       1,  -1,   1,   1,  -1,  -1,  -1,   1,  11,  -1,  -2,   4,  -1,   2, -11,   5,

  1142.      -5,  -4,  -1,   1,   4,   1,  -4,  -1,  -2,   2,   1,  -1,  12,   1,  -2,   1,

  1143.     -12,   4,   2,   1,  -1,  -4,   4,  -4,   2,  -2,  -1,   1,   7,  -1,  -1,  -7,

  1144.      -1,  -3,   1,   3,   1,   5,   2,   1,  -1,  -5,  13,  -2,  -1,   2,  -2, -13,

  1145.       1,  -1,   5,   6,   5,  -5,   1,   1,  -6,   1,  -1,  -1,  -5,  -1,  14,   2,

  1146.      -2,   1, -14,  -1,   8,   1,  -1,  -8,   1,   5,   1,   5,  -5,   1,  -1,   1,

  1147.      -5,  -1,  15,   1,  -1,  -1,  -1,   3, -15,  -3,   6,   1,  16,  -1,   6,  -6,

  1148.      -6,   1,  -1,   1, -16,   1,   7,  -1,   1,  -1,  -6,  -3,   6,  -7,   3,  -1}

  1149. },{

  1150.     /* MapTab3 */

  1151.     0,  /* eob_sym */

  1152.     35, /* esc_sym */

  1153.     /* run table */

  1154.     {0,  1,  1,  2,  2,  3,  3,  4,  4,  1,  1,  5,  5,  6,  6,  7,

  1155.      7,  8,  8,  9,  9,  2,  2, 10, 10,  1,  1, 11, 11, 12, 12,  3,

  1156.      3, 13, 13,  0, 14, 14, 16, 15, 16, 15,  4,  4, 17,  1, 17,  1,

  1157.      5,  5, 18, 18,  2,  2,  6,  6,  8, 19,  7,  8,  7, 19, 20, 20,

  1158.     21, 21, 22, 24, 22, 24, 23, 23,  1,  1, 25, 25,  3,  3, 26, 26,

  1159.      9,  9, 27, 27, 28, 28, 33, 29,  4, 33, 29,  1,  4,  1, 32, 32,

  1160.      2,  2, 31, 10, 30, 10, 30, 31, 34, 34,  5,  5, 36, 36, 35, 41,

  1161.     35, 11, 41, 11, 37,  1,  8,  8, 37,  6,  1,  6, 40,  7,  7, 40,

  1162.     12, 38, 12, 39, 39, 38, 49, 13, 49, 13,  3, 42,  3, 42, 16, 16,

  1163.     43, 43, 14, 14,  1,  1, 44, 15, 44, 15,  2,  2, 57, 48, 50, 48,

  1164.     57, 50,  4, 45, 45,  4, 46, 47, 47, 46,  1, 51,  1, 17, 17, 51,

  1165.      8,  9,  9,  5, 58,  8, 58,  5, 52, 52, 55, 56, 53, 56, 55, 59,

  1166.     59, 53, 54,  1,  6, 54,  7,  7,  6,  1,  2,  3,  2,  3, 64, 60,

  1167.     60, 10, 10, 64, 61, 62, 61, 63,  1, 63, 62,  1, 18, 24, 18,  4,

  1168.     25,  4,  8, 21, 21,  1, 24, 22, 25, 22,  8, 11, 19, 11, 23,  1,

  1169.     20, 23, 19, 20,  5, 12,  5,  1, 16,  2, 12, 13,  2, 13,  1, 16},

  1170. 

  1171.     /* value table */

  1172.     { 0,   1,  -1,   1,  -1,   1,  -1,   1,  -1,   2,  -2,   1,  -1,   1,  -1,   1,

  1173.      -1,   1,  -1,   1,  -1,   2,  -2,   1,  -1,   3,  -3,   1,  -1,   1,  -1,   2,

  1174.      -2,   1,  -1,   0,   1,  -1,   1,   1,  -1,  -1,   2,  -2,   1,   4,  -1,  -4,

  1175.       2,  -2,   1,  -1,  -3,   3,   2,  -2,   2,   1,   2,  -2,  -2,  -1,   1,  -1,

  1176.       1,  -1,   1,   1,  -1,  -1,   1,  -1,   5,  -5,   1,  -1,   3,  -3,   1,  -1,

  1177.       2,  -2,   1,  -1,   1,  -1,   1,   1,   3,  -1,  -1,   6,  -3,  -6,  -1,   1,

  1178.       4,  -4,   1,   2,   1,  -2,  -1,  -1,   1,  -1,   3,  -3,   1,  -1,   1,   1,

  1179.      -1,   2,  -1,  -2,   1,   7,  -3,   3,  -1,   3,  -7,  -3,   1,  -3,   3,  -1,

  1180.       2,   1,  -2,   1,  -1,  -1,   1,   2,  -1,  -2,  -4,  -1,   4,   1,   2,  -2,

  1181.       1,  -1,  -2,   2,   8,  -8,  -1,   2,   1,  -2,  -5,   5,   1,  -1,  -1,   1,

  1182.      -1,   1,   4,  -1,   1,  -4,  -1,  -1,   1,   1,   9,   1,  -9,   2,  -2,  -1,

  1183.      -4,   3,  -3,  -4,  -1,   4,   1,   4,   1,  -1,   1,  -1,   1,   1,  -1,   1,

  1184.      -1,  -1,  -1,  10,   4,   1,   4,  -4,  -4, -10,   6,   5,  -6,  -5,   1,  -1,

  1185.       1,   3,  -3,  -1,   1,  -1,  -1,  -1,  11,   1,   1, -11,  -2,  -2,   2,   5,

  1186.      -2,  -5,  -5,   2,  -2,  12,   2,  -2,   2,   2,   5,  -3,  -2,   3,  -2, -12,

  1187.      -2,   2,   2,   2,  -5,   3,   5,  13,  -3,   7,  -3,  -3,  -7,   3, -13,   3}

  1188. },{

  1189.     /* MapTab4 */

  1190.     0,  /* eob_sym */

  1191.     34, /* esc_sym */

  1192.     /* run table */

  1193.     {0,  1,  1,  1,  2,  2,  1,  3,  3,  1,  1,  1,  4,  4,  1,  5,

  1194.      2,  1,  5,  2,  1,  1,  6,  6,  1,  1,  1,  1,  1,  7,  3,  1,

  1195.      2,  3,  0,  1,  2,  7,  1,  1,  1,  8,  1,  1,  8,  1,  1,  1,

  1196.      9,  1,  9,  1,  2,  1,  1,  2,  1,  1, 10,  4,  1, 10,  1,  4,

  1197.      1,  1,  1,  1,  1,  3,  1,  1,  1,  3,  2,  1,  5,  1,  1,  1,

  1198.      2,  5,  1, 11,  1, 11,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,

  1199.      2,  1,  6,  1,  6,  1,  1,  2,  1,  1,  1,  1,  1,  1,  1, 12,

  1200.      3,  1, 12,  1,  1,  1,  2,  1,  1,  3,  1,  1,  1,  1,  1,  1,

  1201.      4,  1,  1,  1,  2,  1,  1,  4,  1,  1,  1,  1,  1,  1,  2,  1,

  1202.      1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  3,  1,  2,  1,  1,  5,

  1203.      1,  1,  1,  1,  1,  7,  1,  7,  1,  1,  2,  3,  1,  1,  1,  1,

  1204.      5,  1,  1,  1,  1,  1,  1,  2, 13,  1,  1,  1,  1,  1,  1,  1,

  1205.      1,  1,  1,  1,  1,  1,  1,  1, 13,  2,  1,  1,  4,  1,  1,  1,

  1206.      3,  1,  6,  1,  1,  1, 14,  1,  1,  1,  1,  1, 14,  6,  1,  1,

  1207.      1,  1, 15,  2,  4,  1,  2,  3, 15,  1,  1,  1,  8,  1,  1,  8,

  1208.      1,  1,  1,  1,  1,  1,  1,  1,  2,  1,  1,  1,  1,  1,  1,  1},

  1209. 

  1210.     /* value table */

  1211.     { 0,   1,  -1,   2,   1,  -1,  -2,   1,  -1,   3,  -3,   4,   1,  -1,  -4,   1,

  1212.       2,   5,  -1,  -2,  -5,   6,   1,  -1,  -6,   7,  -7,   8,  -8,   1,   2,   9,

  1213.       3,  -2,   0,  -9,  -3,  -1,  10, -10,  11,   1, -11,  12,  -1, -12,  13, -13,

  1214.       1,  14,  -1, -14,   4,  15, -15,  -4,  16, -16,   1,   2,  17,  -1, -17,  -2,

  1215.      18, -18,  19, -19,  20,   3, -20,  21, -21,  -3,   5,  22,   2, -22, -23,  23,

  1216.      -5,  -2,  24,   1, -24,  -1,  25, -25,  26, -26, -27,  27,  28,  29, -28, -29,

  1217.       6,  30,   2, -31,  -2, -30,  31,  -6, -32,  32,  33, -33,  34, -35, -34,   1,

  1218.       4, -36,  -1,  35,  37,  36,   7, -37,  38,  -4, -38,  39,  41,  40, -40, -39,

  1219.       3,  42, -43, -41,  -7, -42,  43,  -3,  44, -44,  45, -45,  46,  47,   8, -47,

  1220.     -48, -46,  50, -50,  48,  49,  51, -49,  52, -52,   5, -51,  -8, -53,  53,   3,

  1221.     -56,  56,  55,  54, -54,   2,  60,  -2, -55,  58,   9,  -5,  59,  57, -57, -63,

  1222.      -3, -58, -60, -61,  61, -59, -62,  -9,   1,  64,  62,  69, -64,  63,  65, -67,

  1223.     -68,  66, -65,  68, -66, -69,  67, -70,  -1,  10,  71, -71,   4,  73,  72,  70,

  1224.       6, -76,  -3,  74, -78, -74,   1,  78,  80, -72, -75,  76,  -1,   3, -73,  79,

  1225.      75,  77,   1,  11,  -4, -79, -10,  -6,  -1, -77, -83, -80,   2,  81, -84,  -2,

  1226.      83, -81,  82, -82,  84, -87, -86,  85, -11, -85,  86, -89,  87, -88,  88,  89}

  1227. },{

  1228.     /* MapTab5 */

  1229.     2,  /* eob_sym */

  1230.     33, /* esc_sym */

  1231.     /* run table */

  1232.     {1,  1,  0,  2,  1,  2,  1,  3,  3,  1,  1,  4,  4,  2,  2,  1,

  1233.      1,  5,  5,  6,  1,  6,  1,  7,  7,  3,  3,  2,  8,  2,  8,  1,

  1234.      1,  0,  9,  9,  1,  1, 10,  4, 10,  4, 11, 11,  2,  1,  2,  1,

  1235.     12, 12,  3,  3,  1,  1, 13,  5,  5, 13, 14,  1,  1, 14,  2,  2,

  1236.      6,  6, 15,  1,  1, 15, 16,  4,  7, 16,  4,  7,  1,  1,  3,  3,

  1237.      8,  8,  2,  2,  1,  1, 17, 17,  1,  1, 18, 18,  5,  5,  2,  2,

  1238.      1,  1,  9, 19,  9, 19, 20,  3,  3, 20,  1, 10, 21,  1, 10,  4,

  1239.      4, 21, 22,  6,  6, 22,  1,  1, 23, 24,  2,  2, 23, 24, 11,  1,

  1240.      1, 11,  7, 25,  7,  1,  1, 25,  8,  8,  3, 26,  3,  1, 12,  2,

  1241.      2, 26,  1, 12,  5,  5, 27,  4,  1,  4,  1, 27, 28,  1, 28, 13,

  1242.      1, 13,  2, 29,  2,  1, 32,  6,  1, 30, 14, 29, 14,  6,  3, 31,

  1243.      3,  1, 30,  1, 32, 31, 33,  9, 33,  1,  1,  7,  9,  7,  2,  2,

  1244.      1,  1,  4, 36, 34,  4,  5, 10, 10,  5, 34,  1,  1, 35,  8,  8,

  1245.     36,  3, 35,  1, 15,  3,  2,  1, 16, 15, 16,  2, 37,  1, 37,  1,

  1246.      1,  1,  6,  6, 38,  1, 38, 11,  1, 39, 39, 40, 11,  2, 41,  4,

  1247.     40,  1,  2,  4,  1,  1,  1, 41,  3,  1,  3,  1,  5,  7,  5,  7},

  1248. 

  1249.     /* value table */

  1250.     { 1,  -1,   0,   1,   2,  -1,  -2,   1,  -1,   3,  -3,   1,  -1,   2,  -2,   4,

  1251.      -4,   1,  -1,   1,   5,  -1,  -5,   1,  -1,   2,  -2,   3,   1,  -3,  -1,   6,

  1252.      -6,   0,   1,  -1,   7,  -7,   1,   2,  -1,  -2,   1,  -1,   4,   8,  -4,  -8,

  1253.       1,  -1,   3,  -3,   9,  -9,   1,   2,  -2,  -1,   1,  10, -10,  -1,   5,  -5,

  1254.       2,  -2,   1,  11, -11,  -1,   1,   3,   2,  -1,  -3,  -2,  12, -12,   4,  -4,

  1255.       2,  -2,  -6,   6,  13, -13,   1,  -1,  14, -14,   1,  -1,   3,  -3,   7,  -7,

  1256.      15, -15,   2,   1,  -2,  -1,   1,   5,  -5,  -1, -16,   2,   1,  16,  -2,   4,

  1257.      -4,  -1,   1,   3,  -3,  -1,  17, -17,   1,   1,  -8,   8,  -1,  -1,   2,  18,

  1258.     -18,  -2,   3,   1,  -3,  19, -19,  -1,   3,  -3,   6,   1,  -6,  20,   2,   9,

  1259.      -9,  -1, -20,  -2,   4,  -4,   1,  -5,  21,   5, -21,  -1,   1, -22,  -1,   2,

  1260.      22,  -2,  10,   1, -10,  23,   1,   4, -23,   1,   2,  -1,  -2,  -4,  -7,   1,

  1261.       7, -24,  -1,  24,  -1,  -1,   1,   3,  -1, -25,  25,   4,  -3,  -4,  11, -11,

  1262.      26, -26,   6,   1,   1,  -6,  -5,  -3,   3,   5,  -1, -27,  27,   1,   4,  -4,

  1263.      -1,  -8,  -1,  28,   2,   8, -12, -28,  -2,  -2,   2,  12,  -1,  29,   1, -29,

  1264.      30, -30,   5,  -5,   1, -31,  -1,   3,  31,  -1,   1,   1,  -3, -13,   1,  -7,

  1265.      -1, -32,  13,   7,  32,  33, -33,  -1,  -9, -34,   9,  34,  -6,   5,   6,  -5}

  1266. },{

  1267.     /* MapTab6 */

  1268.     2,  /* eob_sym */

  1269.     13, /* esc_sym */

  1270.     /* run table */

  1271.     {1,  1,  0,  1,  1,  2,  2,  1,  1,  3,  3,  1,  1,  0,  2,  2,

  1272.      4,  1,  4,  1,  1,  1,  5,  5,  1,  1,  6,  6,  2,  2,  1,  1,

  1273.      3,  3,  7,  7,  1,  1,  8,  8,  1,  1,  2,  2,  1,  9,  1,  9,

  1274.      4,  4, 10,  1,  1, 10,  1,  1, 11, 11,  3,  3,  1,  2,  1,  2,

  1275.      1,  1, 12, 12,  5,  5,  1,  1, 13,  1,  1, 13,  2,  2,  1,  1,

  1276.      6,  6,  1,  1,  4, 14,  4, 14,  3,  1,  3,  1,  1,  1, 15,  7,

  1277.     15,  2,  2,  7,  1,  1,  1,  8,  1,  8, 16, 16,  1,  1,  1,  1,

  1278.      2,  1,  1,  2,  1,  1,  3,  5,  5,  3,  4,  1,  1,  4,  1,  1,

  1279.     17, 17,  9,  1,  1,  9,  2,  2,  1,  1, 10, 10,  1,  6,  1,  1,

  1280.      6, 18,  1,  1, 18,  1,  1,  1,  2,  2,  3,  1,  3,  1,  1,  1,

  1281.      4,  1, 19,  1, 19,  7,  1,  1, 20,  1,  4, 20,  1,  7, 11,  2,

  1282.      1, 11, 21,  2,  8,  5,  1,  8,  1,  5, 21,  1,  1,  1, 22,  1,

  1283.      1, 22,  1,  1,  3,  3,  1, 23,  2, 12, 24,  1,  1,  2,  1,  1,

  1284.     12, 23,  1,  1, 24,  1,  1,  1,  4,  1,  1,  1,  2,  1,  6,  6,

  1285.      4,  2,  1,  1,  1,  1,  1,  1,  1, 14, 13,  3,  1, 25,  9, 25,

  1286.     14,  1,  9,  3, 13,  1,  1,  1,  1,  1, 10,  1,  1,  2, 10,  2},

  1287. 

  1288.     /* value table */

  1289.     {-20,  -1,   0,   2,  -2,   1,  -1,   3,  -3,   1,  -1,   4,  -4,   0,   2,  -2,

  1290.        1,   5,  -1,  -5,   6,  -6,   1,  -1,   7,  -7,   1,  -1,   3,  -3,   8,  -8,

  1291.        2,  -2,   1,  -1,   9,  -9,   1,  -1,  10, -10,   4,  -4,  11,   1, -11,  -1,

  1292.        2,  -2,   1,  12, -12,  -1,  13, -13,   1,  -1,   3,  -3,  14,   5, -14,  -5,

  1293.      -15,  15,  -1,   1,   2,  -2,  16, -16,   1,  17, -17,  -1,   6,  -6,  18, -18,

  1294.        2,  -2, -19,  19,  -3,   1,   3,  -1,   4,  20,  -4,   1, -21,  21,   1,   2,

  1295.       -1,  -7,   7,  -2,  22, -22,  23,   2, -23,  -2,   1,  -1, -24,  24, -25,  25,

  1296.       -8, -26,  26,   8, -27,  27,   5,   3,  -3,  -5,  -4,  28, -28,   4,  29, -29,

  1297.        1,  -1,  -2, -30,  30,   2,   9,  -9, -31,  31,   2,  -2, -32,   3,  32, -33,

  1298.       -3,   1,  33, -34,  -1,  34, -35,  35, -10,  10,  -6,  36,   6, -36,  37, -37,

  1299.       -5,  38,   1, -38,  -1,   3,  39, -39,  -1,  40,   5,   1, -40,  -3,   2, -11,

  1300.      -41,  -2,   1,  11,  -3,  -4,  41,   3,  42,   4,  -1, -43, -42,  43,   1, -44,

  1301.       45,  -1,  44, -45,  -7,   7, -46,   1, -12,   2,   1, -47,  46,  12,  47,  48,

  1302.       -2,  -1, -48,  49,  -1, -50, -49,  50,  -6, -51,  51,  52, -13,  53,  -4,   4,

  1303.        6,  13, -53, -52, -54,  55,  54, -55, -56,  -2,   2,  -8,  56,   1,  -3,  -1,

  1304.        2,  58,   3,   8,  -2,  57, -58, -60, -59, -57,  -3,  60,  59, -14,   3,  14}

  1305. },{

  1306.     /* MapTab7 */

  1307.     2,  /* eob_sym */

  1308.     38, /* esc_sym */

  1309.     /* run table */

  1310.     {1,  1,  0,  2,  2,  1,  1,  3,  3,  4,  4,  5,  5,  1,  1,  6,

  1311.      6,  2,  2,  7,  7,  8,  8,  1,  1,  3,  3,  9,  9, 10, 10,  1,

  1312.      1,  2,  2,  4,  4, 11,  0, 11, 12, 12, 13, 13,  1,  1,  5,  5,

  1313.     14, 14, 15, 16, 15, 16,  3,  3,  1,  6,  1,  6,  2,  2,  7,  7,

  1314.      8,  8, 17, 17,  1,  1,  4,  4, 18, 18,  2,  2,  1, 19,  1, 20,

  1315.     19, 20, 21, 21,  3,  3, 22, 22,  5,  5, 24,  1,  1, 23,  9, 23,

  1316.     24,  9,  2,  2, 10,  1,  1, 10,  6,  6, 25,  4,  4, 25,  7,  7,

  1317.     26,  8,  1,  8,  3,  1, 26,  3, 11, 11, 27, 27,  2, 28,  1,  2,

  1318.     28,  1, 12, 12,  5,  5, 29, 13, 13, 29, 32,  1,  1, 33, 31, 30,

  1319.     32,  4, 30, 33,  4, 31,  3, 14,  1,  1,  3, 34, 34,  2,  2, 14,

  1320.      6,  6, 35, 36, 35, 36,  1, 15,  1, 16, 16, 15,  7,  9,  7,  9,

  1321.     37,  8,  8, 37,  1,  1, 39,  2, 38, 39,  2, 40,  5, 38, 40,  5,

  1322.      3,  3,  4,  4, 10, 10,  1,  1,  1,  1, 41,  2, 41,  2,  6,  6,

  1323.      1,  1, 11, 42, 11, 43,  3, 42,  3, 17,  4, 43,  1, 17,  7,  1,

  1324.      8, 44,  4,  7, 44,  5,  8,  2,  5,  1,  2, 48, 45,  1, 12, 45,

  1325.     12, 48, 13, 13,  1,  9,  9, 46,  1, 46, 47, 47, 49, 18, 18, 49},

  1326. 

  1327.     /* value table */

  1328.     { 1,  -1,   0,   1,  -1,   2,  -2,   1,  -1,   1,  -1,   1,  -1,   3,  -3,   1,

  1329.      -1,  -2,   2,   1,  -1,   1,  -1,   4,  -4,  -2,   2,   1,  -1,   1,  -1,   5,

  1330.      -5,  -3,   3,   2,  -2,   1,   0,  -1,   1,  -1,   1,  -1,   6,  -6,   2,  -2,

  1331.       1,  -1,   1,   1,  -1,  -1,  -3,   3,   7,   2,  -7,  -2,  -4,   4,   2,  -2,

  1332.       2,  -2,   1,  -1,   8,  -8,   3,  -3,   1,  -1,  -5,   5,   9,   1,  -9,   1,

  1333.      -1,  -1,   1,  -1,  -4,   4,   1,  -1,   3,  -3,   1, -10,  10,   1,   2,  -1,

  1334.      -1,  -2,   6,  -6,   2,  11, -11,  -2,   3,  -3,   1,  -4,   4,  -1,   3,  -3,

  1335.       1,   3,  12,  -3,  -5, -12,  -1,   5,   2,  -2,   1,  -1,  -7,   1,  13,   7,

  1336.      -1, -13,   2,  -2,   4,  -4,   1,   2,  -2,  -1,   1,  14, -14,   1,   1,   1,

  1337.      -1,  -5,  -1,  -1,   5,  -1,  -6,   2, -15,  15,   6,   1,  -1,  -8,   8,  -2,

  1338.      -4,   4,   1,   1,  -1,  -1,  16,   2, -16,  -2,   2,  -2,   4,   3,  -4,  -3,

  1339.      -1,  -4,   4,   1, -17,  17,  -1,  -9,   1,   1,   9,   1,  -5,  -1,  -1,   5,

  1340.      -7,   7,   6,  -6,   3,  -3,  18, -18,  19, -19,   1, -10,  -1,  10,  -5,   5,

  1341.      20, -20,  -3,   1,   3,   1,   8,  -1,  -8,   2,   7,  -1, -21,  -2,   5,  21,

  1342.       5,  -1,  -7,  -5,   1,  -6,  -5, -11,   6,  22,  11,   1,   1, -22,  -3,  -1,

  1343.       3,  -1,   3,  -3, -23,   4,  -4,   1,  23,  -1,   1,  -1,   1,  -2,   2,  -1}

  1344. },{

  1345.     /* MapTab8 */

  1346.     4,  /* eob_sym */

  1347.     11, /* esc_sym */

  1348.     /* run table */

  1349.     {1,  1,  1,  1,  0,  2,  2,  1,  1,  3,  3,  0,  1,  1,  2,  2,

  1350.      4,  4,  1,  1,  5,  5,  1,  1,  2,  2,  3,  3,  6,  6,  1,  1,

  1351.      7,  7,  8,  1,  8,  2,  2,  1,  4,  4,  1,  3,  1,  3,  9,  9,

  1352.      2,  2,  1,  5,  1,  5, 10, 10,  1,  1, 11, 11,  3,  6,  3,  4,

  1353.      4,  6,  2,  2,  1, 12,  1, 12,  7, 13,  7, 13,  1,  1,  8,  8,

  1354.      2,  2, 14, 14, 16, 15, 16,  5,  5,  1,  3, 15,  1,  3,  4,  4,

  1355.      1,  1, 17, 17,  2,  2,  6,  6,  1, 18,  1, 18, 22, 21, 22, 21,

  1356.     25, 24, 25, 19,  9, 20,  9, 23, 19, 24, 20,  3, 23,  7,  3,  1,

  1357.      1,  7, 28, 26, 29,  5, 28, 26,  5,  8, 29,  4,  8, 27,  2,  2,

  1358.      4, 27,  1,  1, 10, 36, 10, 33, 33, 36, 30,  1, 32, 32,  1, 30,

  1359.      6, 31, 31, 35,  3,  6, 11, 11,  3,  2, 35,  2, 34,  1, 34,  1,

  1360.     37, 37, 12,  7, 12,  5, 41,  5,  4,  7,  1,  8, 13,  4,  1, 41,

  1361.     13, 38,  8, 38,  9,  1, 40, 40,  9,  1, 39,  2,  2, 49, 39, 42,

  1362.      3,  3, 14, 16, 49, 14, 16, 42, 43, 43,  6,  6, 15,  1,  1, 15,

  1363.     44, 44,  1,  1, 50, 48,  4,  5,  4,  7,  5,  2, 10, 10, 48,  7,

  1364.     50, 45,  2,  1, 45,  8,  8,  1, 46, 46,  3, 47, 47,  3,  1,  1},

  1365. 

  1366.     /* value table */

  1367.     { 1,  -1,   2,  -2,   0,   1,  -1,   3,  -3,   1,  -1,   0,   4,  -4,   2,  -2,

  1368.       1,  -1,   5,  -5,   1,  -1,   6,  -6,   3,  -3,   2,  -2,   1,  -1,   7,  -7,

  1369.       1,  -1,   1,   8,  -1,   4,  -4,  -8,   2,  -2,   9,   3,  -9,  -3,   1,  -1,

  1370.       5,  -5,  10,   2, -10,  -2,   1,  -1,  11, -11,   1,  -1,  -4,   2,   4,   3,

  1371.      -3,  -2,   6,  -6,  12,   1, -12,  -1,   2,   1,  -2,  -1,  13, -13,   2,  -2,

  1372.       7,  -7,   1,  -1,   1,   1,  -1,   3,  -3,  14,   5,  -1, -14,  -5,   4,  -4,

  1373.      15, -15,   1,  -1,   8,  -8,  -3,   3,  16,   1, -16,  -1,   1,   1,  -1,  -1,

  1374.       1,   1,  -1,   1,   2,   1,  -2,   1,  -1,  -1,  -1,   6,  -1,   3,  -6,  17,

  1375.     -17,  -3,   1,   1,   1,   4,  -1,  -1,  -4,   3,  -1,   5,  -3,  -1,  -9,   9,

  1376.      -5,   1,  18, -18,   2,   1,  -2,   1,  -1,  -1,   1,  19,  -1,   1, -19,  -1,

  1377.       4,   1,  -1,   1,   7,  -4,  -2,   2,  -7,  10,  -1, -10,   1,  20,  -1, -20,

  1378.       1,  -1,   2,   4,  -2,   5,   1,  -5,   6,  -4,  21,   4,   2,  -6, -21,  -1,

  1379.      -2,   1,  -4,  -1,  -3,  22,  -1,   1,   3, -22,  -1,  11, -11,   1,   1,   1,

  1380.       8,  -8,   2,   2,  -1,  -2,  -2,  -1,   1,  -1,  -5,   5,   2,  23, -23,  -2,

  1381.       1,  -1,  24, -24,  -1,  -1,   7,   6,  -7,   5,  -6,  12,  -3,   3,   1,  -5,

  1382.       1,   1, -12,  25,  -1,  -5,   5, -25,  -1,   1,   9,   1,  -1,  -9,  26, -26}

  1383. }

  1384. };