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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 Libav.

  7.  *

  8.  * Libav 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.  * Libav 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 Libav; 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. /**

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

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

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

  42.  * startup from these descriptors.

  43.  */

  44. /** static macroblock huffman tables */

  45. static const IVIHuffDesc ivi_mb_huff_desc[8] = {

  46.     {8,  {0, 4, 5, 4, 4, 4, 6, 6}},

  47.     {12, {0, 2, 2, 3, 3, 3, 3, 5, 3, 2, 2, 2}},

  48.     {12, {0, 2, 3, 4, 3, 3, 3, 3, 4, 3, 2, 2}},

  49.     {12, {0, 3, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2}},

  50.     {13, {0, 4, 4, 3, 3, 3, 3, 2, 3, 3, 2, 1, 1}},

  51.     {9,  {0, 4, 4, 4, 4, 3, 3, 3, 2}},

  52.     {10, {0, 4, 4, 4, 4, 3, 3, 2, 2, 2}},

  53.     {12, {0, 4, 4, 4, 3, 3, 2, 3, 2, 2, 2, 2}}

  54. };

  55. 

  56. /** static block huffman tables */

  57. static const IVIHuffDesc ivi_blk_huff_desc[8] = {

  58.     {10, {1, 2, 3, 4, 4, 7, 5, 5, 4, 1}},

  59.     {11, {2, 3, 4, 4, 4, 7, 5, 4, 3, 3, 2}},

  60.     {12, {2, 4, 5, 5, 5, 5, 6, 4, 4, 3, 1, 1}},

  61.     {13, {3, 3, 4, 4, 5, 6, 6, 4, 4, 3, 2, 1, 1}},

  62.     {11, {3, 4, 4, 5, 5, 5, 6, 5, 4, 2, 2}},

  63.     {13, {3, 4, 5, 5, 5, 5, 6, 4, 3, 3, 2, 1, 1}},

  64.     {13, {3, 4, 5, 5, 5, 6, 5, 4, 3, 3, 2, 1, 1}},

  65.     {9,  {3, 4, 4, 5, 5, 5, 6, 5, 5}}

  66. };

  67. 

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

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

  70. 

  71. typedef void (*ivi_mc_func) (int16_t *buf, const int16_t *ref_buf,

  72.                              uint32_t pitch, int mc_type);

  73. 

  74. static int ivi_mc(IVIBandDesc *band, ivi_mc_func mc,

  75.                   int offs, int mv_x, int mv_y, int mc_type)

  76. {

  77.     int ref_offs = offs + mv_y * band->pitch + mv_x;

  78.     int buf_size = band->pitch * band->aheight;

  79.     int min_size = band->pitch * (band->blk_size - 1) + band->blk_size;

  80.     int ref_size = (mc_type > 1) * band->pitch + (mc_type & 1);

  81. 

  82.     if (offs < 0 || ref_offs < 0 || !band->ref_buf)

  83.         return AVERROR_INVALIDDATA;

  84.     if (buf_size - min_size < offs)

  85.         return AVERROR_INVALIDDATA;

  86.     if (buf_size - min_size - ref_size < ref_offs)

  87.         return AVERROR_INVALIDDATA;

  88. 

  89.     mc(band->buf + offs, band->ref_buf + ref_offs, band->pitch, mc_type);

  90. 

  91.     return 0;

  92. }

  93. 

  94. /**

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

  96.  *  in the least significant bits.

  97.  */

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

  99. {

  100.     uint16_t res;

  101. 

  102.     if (nbits <= 8) {

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

  104.     } else

  105.         res = ((ff_reverse[val & 0xFF] << 8) +

  106.                (ff_reverse[val >> 8])) >> (16 - nbits);

  107. 

  108.     return res;

  109. }

  110. 

  111. /*

  112.  *  Generate a huffman codebook from the given descriptor

  113.  *  and convert it into the Libav VLC table.

  114.  *

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

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

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

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

  119.  */

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

  121. {

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

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

  124.     uint8_t     bits[256];

  125. 

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

  127. 

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

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

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

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

  132. 

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

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

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

  136. 

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

  138.             if (bits[pos] > IVI_VLC_BITS)

  139.                 return AVERROR_INVALIDDATA; /* invalid descriptor */

  140. 

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

  142.             if (!bits[pos])

  143.                 bits[pos] = 1;

  144. 

  145.             pos++;

  146.         }//for j

  147.     }//for i

  148. 

  149.     /* number of codewords = pos */

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

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

  152. }

  153. 

  154. av_cold void ff_ivi_init_static_vlc(void)

  155. {

  156.     int i;

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

  158.     static int initialized_vlcs = 0;

  159. 

  160.     if (initialized_vlcs)

  161.         return;

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

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

  164.         ivi_mb_vlc_tabs[i].table_allocated = 8192;

  165.         ivi_create_huff_from_desc(&ivi_mb_huff_desc[i],

  166.                                   &ivi_mb_vlc_tabs[i], 1);

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

  168.         ivi_blk_vlc_tabs[i].table_allocated = 8192;

  169.         ivi_create_huff_from_desc(&ivi_blk_huff_desc[i],

  170.                                   &ivi_blk_vlc_tabs[i], 1);

  171.     }

  172.     initialized_vlcs = 1;

  173. }

  174. 

  175. /*

  176.  *  Copy huffman codebook descriptors.

  177.  *

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

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

  180.  */

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

  182. {

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

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

  185. }

  186. 

  187. /*

  188.  *  Compare two huffman codebook descriptors.

  189.  *

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

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

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

  193.  */

  194. static int ivi_huff_desc_cmp(const IVIHuffDesc *desc1,

  195.                              const IVIHuffDesc *desc2)

  196. {

  197.     return desc1->num_rows != desc2->num_rows ||

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

  199. }

  200. 

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

  202.                          IVIHuffTab *huff_tab, AVCodecContext *avctx)

  203. {

  204.     int i, result;

  205.     IVIHuffDesc new_huff;

  206. 

  207.     if (!desc_coded) {

  208.         /* select default table */

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

  210.                                     : &ivi_mb_vlc_tabs [7];

  211.         return 0;

  212.     }

  213. 

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

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

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

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

  218.         if (!new_huff.num_rows) {

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

  220.             return AVERROR_INVALIDDATA;

  221.         }

  222. 

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

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

  225. 

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

  227.         if (ivi_huff_desc_cmp(&new_huff, &huff_tab->cust_desc)) {

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

  229. 

  230.             if (huff_tab->cust_tab.table)

  231.                 ff_free_vlc(&huff_tab->cust_tab);

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

  233.                     &huff_tab->cust_tab, 0);

  234.             if (result) {

  235.                 // reset faulty description

  236.                 huff_tab->cust_desc.num_rows = 0;

  237.                 av_log(avctx, AV_LOG_ERROR,

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

  239.                 return result;

  240.             }

  241.         }

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

  243.     } else {

  244.         /* select one of predefined tables */

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

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

  247.     }

  248. 

  249.     return 0;

  250. }

  251. 

  252. /*

  253.  *  Free planes, bands and macroblocks buffers.

  254.  *

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

  256.  */

  257. static av_cold void ivi_free_buffers(IVIPlaneDesc *planes)

  258. {

  259.     int p, b, t;

  260. 

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

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

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

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

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

  266. 

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

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

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

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

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

  272.         }

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

  274.         planes[p].num_bands = 0;

  275.     }

  276. }

  277. 

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

  279. {

  280.     int p, b;

  281.     uint32_t b_width, b_height, align_fac, width_aligned,

  282.              height_aligned, buf_size;

  283.     IVIBandDesc *band;

  284. 

  285.     ivi_free_buffers(planes);

  286. 

  287.     if (cfg->pic_width < 1 || cfg->pic_height < 1 ||

  288.         cfg->luma_bands < 1 || cfg->chroma_bands < 1)

  289.         return AVERROR_INVALIDDATA;

  290. 

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

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

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

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

  295. 

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

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

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

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

  300. 

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

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

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

  304.             return AVERROR(ENOMEM);

  305. 

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

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

  308.          *  has only half size */

  309.         b_width  = planes[p].num_bands == 1 ? planes[p].width

  310.                                             : (planes[p].width  + 1) >> 1;

  311.         b_height = planes[p].num_bands == 1 ? planes[p].height

  312.                                             : (planes[p].height + 1) >> 1;

  313. 

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

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

  316.         align_fac       = p ? 8 : 16;

  317.         width_aligned   = FFALIGN(b_width , align_fac);

  318.         height_aligned  = FFALIGN(b_height, align_fac);

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

  320. 

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

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

  323.             band->plane    = p;

  324.             band->band_num = b;

  325.             band->width    = b_width;

  326.             band->height   = b_height;

  327.             band->pitch    = width_aligned;

  328.             band->aheight  = height_aligned;

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

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

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

  332.                 return AVERROR(ENOMEM);

  333. 

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

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

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

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

  338.                     return AVERROR(ENOMEM);

  339.             }

  340.             /* reset custom vlc */

  341.             planes[p].bands[0].blk_vlc.cust_desc.num_rows = 0;

  342.         }

  343.     }

  344. 

  345.     return 0;

  346. }

  347. 

  348. static int ivi_init_tiles(IVIBandDesc *band, IVITile *ref_tile,

  349.                           int p, int b, int t_height, int t_width)

  350. {

  351.     int x, y;

  352.     IVITile *tile = band->tiles;

  353. 

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

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

  356.             tile->xpos     = x;

  357.             tile->ypos     = y;

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

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

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

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

  362.             /* calculate number of macroblocks */

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

  364.                                               band->mb_size);

  365. 

  366.             av_freep(&tile->mbs);

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

  368.             if (!tile->mbs)

  369.                 return AVERROR(ENOMEM);

  370. 

  371.             tile->ref_mbs = 0;

  372.             if (p || b) {

  373.                 if (tile->num_MBs != ref_tile->num_MBs)

  374.                     return AVERROR_INVALIDDATA;

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

  376.                 ref_tile++;

  377.             }

  378.             tile++;

  379.         }

  380.     }

  381. 

  382.     return 0;

  383. }

  384. 

  385. av_cold int ff_ivi_init_tiles(IVIPlaneDesc *planes,

  386.                               int tile_width, int tile_height)

  387. {

  388.     int p, b, x_tiles, y_tiles, t_width, t_height, ret;

  389.     IVIBandDesc *band;

  390. 

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

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

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

  394. 

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

  396.             t_width  >>= 1;

  397.             t_height >>= 1;

  398.         }

  399. 

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

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

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

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

  404.             band->num_tiles = x_tiles * y_tiles;

  405. 

  406.             av_freep(&band->tiles);

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

  408.             if (!band->tiles)

  409.                 return AVERROR(ENOMEM);

  410. 

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

  412.              * and quant */

  413.             ret = ivi_init_tiles(band, planes[0].bands[0].tiles,

  414.                                  p, b, t_height, t_width);

  415.             if (ret < 0)

  416.                 return ret;

  417.         }

  418.     }

  419. 

  420.     return 0;

  421. }

  422. 

  423. /*

  424.  *  Decode size of the tile data.

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

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

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

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

  429.  *

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

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

  432.  */

  433. static int ivi_dec_tile_data_size(GetBitContext *gb)

  434. {

  435.     int    len;

  436. 

  437.     len = 0;

  438.     if (get_bits1(gb)) {

  439.         len = get_bits(gb, 8);

  440.         if (len == 255)

  441.             len = get_bits_long(gb, 24);

  442.     }

  443. 

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

  445.     align_get_bits(gb);

  446. 

  447.     return len;

  448. }

  449. 

  450. static int ivi_dc_transform(IVIBandDesc *band, int *prev_dc, int buf_offs,

  451.                             int blk_size)

  452. {

  453.     int buf_size = band->pitch * band->aheight - buf_offs;

  454.     int min_size = (blk_size - 1) * band->pitch + blk_size;

  455. 

  456.     if (!band->dc_transform)

  457.         return 0;

  458. 

  459. 

  460.     if (min_size > buf_size)

  461.         return AVERROR_INVALIDDATA;

  462. 

  463.     band->dc_transform(prev_dc, band->buf + buf_offs,

  464.                        band->pitch, blk_size);

  465. 

  466.     return 0;

  467. }

  468. 

  469. static int ivi_decode_coded_blocks(GetBitContext *gb, IVIBandDesc *band,

  470.                                    ivi_mc_func mc, int mv_x, int mv_y,

  471.                                    int *prev_dc, int is_intra, int mc_type,

  472.                                    uint32_t quant, int offs,

  473.                                    AVCodecContext *avctx)

  474. {

  475.     const uint16_t *base_tab  = is_intra ? band->intra_base : band->inter_base;

  476.     RVMapDesc *rvmap = band->rv_map;

  477.     uint8_t col_flags[8];

  478.     int32_t trvec[64];

  479.     uint32_t sym = 0, lo, hi, q;

  480.     int pos, run, val;

  481.     int blk_size   = band->blk_size;

  482.     int num_coeffs = blk_size * blk_size;

  483.     int col_mask   = blk_size - 1;

  484.     int scan_pos   = -1;

  485.     int min_size   = band->pitch * (band->transform_size - 1) +

  486.                      band->transform_size;

  487.     int buf_size   = band->pitch * band->aheight - offs;

  488. 

  489.     if (min_size > buf_size)

  490.         return AVERROR_INVALIDDATA;

  491. 

  492.     if (!band->scan) {

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

  494.         return AVERROR_INVALIDDATA;

  495.     }

  496. 

  497.     /* zero transform vector */

  498.     memset(trvec, 0, num_coeffs * sizeof(trvec[0]));

  499.     /* zero column flags */

  500.     memset(col_flags, 0, sizeof(col_flags));

  501.     while (scan_pos <= num_coeffs) {

  502.         sym = get_vlc2(gb, band->blk_vlc.tab->table,

  503.                        IVI_VLC_BITS, 1);

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

  505.             break; /* End of block */

  506. 

  507.         /* Escape - run/val explicitly coded using 3 vlc codes */

  508.         if (sym == rvmap->esc_sym) {

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

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

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

  512.             /* merge them and convert into signed val */

  513.             val = IVI_TOSIGNED((hi << 6) | lo);

  514.         } else {

  515.             if (sym >= 256U) {

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

  517.                 return AVERROR_INVALIDDATA;

  518.             }

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

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

  521.         }

  522. 

  523.         /* de-zigzag and dequantize */

  524.         scan_pos += run;

  525.         if (scan_pos >= num_coeffs || scan_pos < 0)

  526.             break;

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

  528. 

  529.         if (!val)

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

  531. 

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

  533.         if (q > 1)

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

  535.         trvec[pos] = val;

  536.         /* track columns containing non-zero coeffs */

  537.         col_flags[pos & col_mask] |= !!val;

  538.     }

  539. 

  540.     if (scan_pos < 0 || scan_pos >= num_coeffs && sym != rvmap->eob_sym)

  541.         return AVERROR_INVALIDDATA; /* corrupt block data */

  542. 

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

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

  545.         *prev_dc     += trvec[0];

  546.         trvec[0]      = *prev_dc;

  547.         col_flags[0] |= !!*prev_dc;

  548.     }

  549. 

  550.     /* apply inverse transform */

  551.     band->inv_transform(trvec, band->buf + offs,

  552.                         band->pitch, col_flags);

  553. 

  554.     /* apply motion compensation */

  555.     if (!is_intra)

  556.         return ivi_mc(band, mc, offs, mv_x, mv_y, mc_type);

  557. 

  558.     return 0;

  559. }

  560. /*

  561.  *  Decode block data:

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

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

  564.  *  in order to reconstruct the picture.

  565.  *

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

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

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

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

  570.  */

  571. static int ivi_decode_blocks(GetBitContext *gb, IVIBandDesc *band,

  572.                              IVITile *tile, AVCodecContext *avctx)

  573. {

  574.     int mbn, blk, num_blocks, blk_size, ret, is_intra, mc_type = 0;

  575.     int mv_x = 0, mv_y = 0;

  576.     int32_t prev_dc;

  577.     uint32_t cbp, quant, buf_offs;

  578.     IVIMbInfo *mb;

  579.     ivi_mc_func mc_with_delta_func, mc_no_delta_func;

  580.     const uint8_t *scale_tab;

  581. 

  582.     /* init intra prediction for the DC coefficient */

  583.     prev_dc    = 0;

  584.     blk_size   = band->blk_size;

  585.     /* number of blocks per mb */

  586.     num_blocks = (band->mb_size != blk_size) ? 4 : 1;

  587.     if (blk_size == 8) {

  588.         mc_with_delta_func = ff_ivi_mc_8x8_delta;

  589.         mc_no_delta_func   = ff_ivi_mc_8x8_no_delta;

  590.     } else {

  591.         mc_with_delta_func = ff_ivi_mc_4x4_delta;

  592.         mc_no_delta_func   = ff_ivi_mc_4x4_no_delta;

  593.     }

  594. 

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

  596.         is_intra = !mb->type;

  597.         cbp      = mb->cbp;

  598.         buf_offs = mb->buf_offs;

  599. 

  600.         quant = band->glob_quant + mb->q_delta;

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

  602.             quant = av_clip(quant, 0, 31);

  603.         else

  604.             quant = av_clip(quant, 0, 23);

  605. 

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

  607.         if (scale_tab)

  608.             quant = scale_tab[quant];

  609. 

  610.         if (!is_intra) {

  611.             mv_x = mb->mv_x;

  612.             mv_y = mb->mv_y;

  613.             if (band->is_halfpel) {

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

  615.                 mv_x >>= 1;

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

  617.             }

  618.             if (mb->type) {

  619.                 int dmv_x, dmv_y, cx, cy;

  620. 

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

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

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

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

  625. 

  626.                 if (mb->xpos + dmv_x < 0 ||

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

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

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

  630.                     return AVERROR_INVALIDDATA;

  631.                 }

  632.             }

  633.         }

  634. 

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

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

  637.             if (blk & 1) {

  638.                 buf_offs += blk_size;

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

  640.                 buf_offs -= blk_size;

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

  642.             }

  643. 

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

  645.                 ret = ivi_decode_coded_blocks(gb, band, mc_with_delta_func,

  646.                                               mv_x, mv_y, &prev_dc, is_intra,

  647.                                               mc_type, quant, buf_offs, avctx);

  648.                 if (ret < 0)

  649.                     return ret;

  650.             } else {

  651.                 /* block not coded */

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

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

  654.                 if (is_intra) {

  655.                     ret = ivi_dc_transform(band, &prev_dc, buf_offs, blk_size);

  656.                     if (ret < 0)

  657.                         return ret;

  658.                 } else {

  659.                     ret = ivi_mc(band, mc_no_delta_func, buf_offs,

  660.                                  mv_x, mv_y, mc_type);

  661.                     if (ret < 0)

  662.                         return ret;

  663.                 }

  664.             }

  665. 

  666.             cbp >>= 1;

  667.         }// for blk

  668.     }// for mbn

  669. 

  670.     align_get_bits(gb);

  671. 

  672.     return 0;

  673. }

  674. 

  675. /**

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

  677.  *  compensation respectively.

  678.  *

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

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

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

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

  683.  */

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

  685.                                   IVITile *tile, int32_t mv_scale)

  686. {

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

  688.     int             offs, mb_offset, row_offset, ret;

  689.     IVIMbInfo       *mb, *ref_mb;

  690.     const int16_t   *src;

  691.     int16_t         *dst;

  692.     ivi_mc_func     mc_no_delta_func;

  693. 

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

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

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

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

  698.         return AVERROR_INVALIDDATA;

  699.     }

  700. 

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

  702.     mb         = tile->mbs;

  703.     ref_mb     = tile->ref_mbs;

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

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

  706. 

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

  708.         mb_offset = offs;

  709. 

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

  711.             mb->xpos     = x;

  712.             mb->ypos     = y;

  713.             mb->buf_offs = mb_offset;

  714. 

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

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

  717. 

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

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

  720.                 mb->mv_x    = 0;

  721.                 mb->mv_y    = 0;

  722.             }

  723. 

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

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

  726. 

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

  728.                 /* motion vector inheritance */

  729.                 if (mv_scale) {

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

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

  732.                 } else {

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

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

  735.                 }

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

  737.             }

  738. 

  739.             mb++;

  740.             if (ref_mb)

  741.                 ref_mb++;

  742.             mb_offset += band->mb_size;

  743.         } // for x

  744.         offs += row_offset;

  745.     } // for y

  746. 

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

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

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

  750.                                                  : ff_ivi_mc_4x4_no_delta;

  751. 

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

  753.             mv_x = mb->mv_x;

  754.             mv_y = mb->mv_y;

  755.             if (!band->is_halfpel) {

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

  757.             } else {

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

  759.                 mv_x >>= 1;

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

  761.             }

  762. 

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

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

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

  766.                 ret = ivi_mc(band, mc_no_delta_func, offs,

  767.                              mv_x, mv_y, mc_type);

  768.                 if (ret < 0)

  769.                     return ret;

  770.             }

  771.         }

  772.     } else {

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

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

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

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

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

  778.             src += band->pitch;

  779.             dst += band->pitch;

  780.         }

  781.     }

  782. 

  783.     return 0;

  784. }

  785. 

  786. 

  787. #ifdef DEBUG

  788. static uint16_t ivi_calc_band_checksum(IVIBandDesc *band)

  789. {

  790.     int         x, y;

  791.     int16_t     *src, checksum;

  792. 

  793.     src = band->buf;

  794.     checksum = 0;

  795. 

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

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

  798.             checksum += src[x];

  799. 

  800.     return checksum;

  801. }

  802. #endif

  803. 

  804. /*

  805.  *  Convert and output the current plane.

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

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

  808.  *

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

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

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

  812.  */

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

  814. {

  815.     int             x, y;

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

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

  818. 

  819.     if (!src)

  820.         return;

  821. 

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

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

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

  825.         src += pitch;

  826.         dst += dst_pitch;

  827.     }

  828. }

  829. 

  830. /**

  831.  *  Decode an Indeo 4 or 5 band.

  832.  *

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

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

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

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

  837.  */

  838. static int decode_band(IVI45DecContext *ctx,

  839.                        IVIBandDesc *band, AVCodecContext *avctx)

  840. {

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

  842.     IVITile     *tile;

  843. 

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

  845.     if (!band->buf) {

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

  847.         return AVERROR_INVALIDDATA;

  848.     }

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

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

  851. 

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

  853.     if (result) {

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

  855.                result);

  856.         return result;

  857.     }

  858. 

  859.     if (band->is_empty) {

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

  861.         return AVERROR_INVALIDDATA;

  862.     }

  863. 

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

  865. 

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

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

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

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

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

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

  872.     }

  873. 

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

  875. 

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

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

  878. 

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

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

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

  882.             return AVERROR_INVALIDDATA;

  883.         }

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

  885.         if (tile->is_empty) {

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

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

  888.             if (result < 0)

  889.                 break;

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

  891.         } else {

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

  893.             if (!tile->data_size) {

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

  895.                 return AVERROR_INVALIDDATA;

  896.             }

  897. 

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

  899.             if (result < 0)

  900.                 break;

  901. 

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

  903.             if (result < 0) {

  904.                 av_log(avctx, AV_LOG_ERROR,

  905.                        "Corrupted tile data encountered!\n");

  906.                 break;

  907.             }

  908. 

  909.             if (((get_bits_count(&ctx->gb) - pos) >> 3) != tile->data_size) {

  910.                 av_log(avctx, AV_LOG_ERROR,

  911.                        "Tile data_size mismatch!\n");

  912.                 result = AVERROR_INVALIDDATA;

  913.                 break;

  914.             }

  915. 

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

  917.         }

  918.     }

  919. 

  920.     /* restore the selected rvmap table by applying its corrections in

  921.      * reverse order */

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

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

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

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

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

  927.     }

  928. 

  929. #ifdef DEBUG

  930.     if (band->checksum_present) {

  931.         uint16_t chksum = ivi_calc_band_checksum(band);

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

  933.             av_log(avctx, AV_LOG_ERROR,

  934.                    "Band checksum mismatch! Plane %d, band %d, "

  935.                    "received: %x, calculated: %x\n",

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

  937.         }

  938.     }

  939. #endif

  940. 

  941.     align_get_bits(&ctx->gb);

  942. 

  943.     return result;

  944. }

  945. 

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

  947.                         AVPacket *avpkt)

  948. {

  949.     IVI45DecContext *ctx = avctx->priv_data;

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

  951.     AVFrame       *frame = data;

  952.     int             buf_size = avpkt->size;

  953.     int             result, p, b;

  954. 

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

  956.     ctx->frame_data = buf;

  957.     ctx->frame_size = buf_size;

  958. 

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

  960.     if (result) {

  961.         av_log(avctx, AV_LOG_ERROR,

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

  963.         return result;

  964.     }

  965.     if (ctx->gop_invalid)

  966.         return AVERROR_INVALIDDATA;

  967. 

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

  969.         avpriv_report_missing_feature(avctx, "Password-protected clip!\n");

  970.         return AVERROR_PATCHWELCOME;

  971.     }

  972. 

  973.     if (!ctx->planes[0].bands) {

  974.         av_log(avctx, AV_LOG_ERROR, "Color planes not initialized yet\n");

  975.         return AVERROR_INVALIDDATA;

  976.     }

  977. 

  978.     ctx->switch_buffers(ctx);

  979. 

  980.     //{ START_TIMER;

  981. 

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

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

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

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

  986.                 if (result < 0) {

  987.                     av_log(avctx, AV_LOG_ERROR,

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

  989.                     return result;

  990.                 }

  991.             }

  992.         }

  993.     } else {

  994.         if (ctx->is_scalable)

  995.             return AVERROR_INVALIDDATA;

  996. 

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

  998.             if (!ctx->planes[p].bands[0].buf)

  999.                 return AVERROR_INVALIDDATA;

  1000.         }

  1001.     }

  1002. 

  1003.     //STOP_TIMER("decode_planes"); }

  1004. 

  1005.     /* If the bidirectional mode is enabled, next I and the following P

  1006.      * frame will be sent together. Unfortunately the approach below seems

  1007.      * to be the only way to handle the B-frames mode.

  1008.      * That's exactly the same Intel decoders do.

  1009.      */

  1010.     if (avctx->codec_id == AV_CODEC_ID_INDEO4 &&

  1011.         ctx->frame_type == 0/*FRAMETYPE_INTRA*/) {

  1012.         while (get_bits(&ctx->gb, 8)); // skip version string

  1013.         skip_bits_long(&ctx->gb, 64);  // skip padding, TODO: implement correct 8-bytes alignment

  1014.         if (get_bits_left(&ctx->gb) > 18 && show_bits(&ctx->gb, 18) == 0x3FFF8)

  1015.             av_log(avctx, AV_LOG_ERROR, "Buffer contains IP frames!\n");

  1016.     }

  1017. 

  1018.     avcodec_set_dimensions(avctx, ctx->planes[0].width, ctx->planes[0].height);

  1019.     if ((result = ff_get_buffer(avctx, frame, 0)) < 0) {

  1020.         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");

  1021.         return result;

  1022.     }

  1023. 

  1024.     if (ctx->is_scalable) {

  1025.         if (avctx->codec_id == AV_CODEC_ID_INDEO4)

  1026.             ff_ivi_recompose_haar(&ctx->planes[0], frame->data[0], frame->linesize[0]);

  1027.         else

  1028.             ff_ivi_recompose53   (&ctx->planes[0], frame->data[0], frame->linesize[0]);

  1029.     } else {

  1030.         ivi_output_plane(&ctx->planes[0], frame->data[0], frame->linesize[0]);

  1031.     }

  1032. 

  1033.     ivi_output_plane(&ctx->planes[2], frame->data[1], frame->linesize[1]);

  1034.     ivi_output_plane(&ctx->planes[1], frame->data[2], frame->linesize[2]);

  1035. 

  1036.     *got_frame = 1;

  1037. 

  1038.     return buf_size;

  1039. }

  1040. 

  1041. /**

  1042.  *  Close Indeo5 decoder and clean up its context.

  1043.  */

  1044. av_cold int ff_ivi_decode_close(AVCodecContext *avctx)

  1045. {

  1046.     IVI45DecContext *ctx = avctx->priv_data;

  1047. 

  1048.     ivi_free_buffers(&ctx->planes[0]);

  1049. 

  1050.     if (ctx->mb_vlc.cust_tab.table)

  1051.         ff_free_vlc(&ctx->mb_vlc.cust_tab);

  1052. 

  1053. #if IVI4_STREAM_ANALYSER

  1054.     if (avctx->codec_id == AV_CODEC_ID_INDEO4) {

  1055.     if (ctx->is_scalable)

  1056.         av_log(avctx, AV_LOG_ERROR, "This video uses scalability mode!\n");

  1057.     if (ctx->uses_tiling)

  1058.         av_log(avctx, AV_LOG_ERROR, "This video uses local decoding!\n");

  1059.     if (ctx->has_b_frames)

  1060.         av_log(avctx, AV_LOG_ERROR, "This video contains B-frames!\n");

  1061.     if (ctx->has_transp)

  1062.         av_log(avctx, AV_LOG_ERROR, "Transparency mode is enabled!\n");

  1063.     if (ctx->uses_haar)

  1064.         av_log(avctx, AV_LOG_ERROR, "This video uses Haar transform!\n");

  1065.     if (ctx->uses_fullpel)

  1066.         av_log(avctx, AV_LOG_ERROR, "This video uses fullpel motion vectors!\n");

  1067.     }

  1068. #endif

  1069. 

  1070.     return 0;

  1071. }

  1072. 

  1073. 

  1074. /**

  1075.  *  Scan patterns shared between indeo4 and indeo5

  1076.  */

  1077. const uint8_t ff_ivi_vertical_scan_8x8[64] = {

  1078.     0,  8, 16, 24, 32, 40, 48, 56,

  1079.     1,  9, 17, 25, 33, 41, 49, 57,

  1080.     2, 10, 18, 26, 34, 42, 50, 58,

  1081.     3, 11, 19, 27, 35, 43, 51, 59,

  1082.     4, 12, 20, 28, 36, 44, 52, 60,

  1083.     5, 13, 21, 29, 37, 45, 53, 61,

  1084.     6, 14, 22, 30, 38, 46, 54, 62,

  1085.     7, 15, 23, 31, 39, 47, 55, 63

  1086. };

  1087. 

  1088. const uint8_t ff_ivi_horizontal_scan_8x8[64] = {

  1089.      0,  1,  2,  3,  4,  5,  6,  7,

  1090.      8,  9, 10, 11, 12, 13, 14, 15,

  1091.     16, 17, 18, 19, 20, 21, 22, 23,

  1092.     24, 25, 26, 27, 28, 29, 30, 31,

  1093.     32, 33, 34, 35, 36, 37, 38, 39,

  1094.     40, 41, 42, 43, 44, 45, 46, 47,

  1095.     48, 49, 50, 51, 52, 53, 54, 55,

  1096.     56, 57, 58, 59, 60, 61, 62, 63

  1097. };

  1098. 

  1099. const uint8_t ff_ivi_direct_scan_4x4[16] = {

  1100.     0, 1, 4, 8, 5, 2, 3, 6, 9, 12, 13, 10, 7, 11, 14, 15

  1101. };

  1102. 

  1103. 

  1104. /**

  1105.  *  Run-value (RLE) tables.

  1106.  */

  1107. const RVMapDesc ff_ivi_rvmap_tabs[9] = {

  1108. {   /* MapTab0 */

  1109.     5, /* eob_sym */

  1110.     2, /* esc_sym */

  1111.     /* run table */

  1112.     {1,  1,  0,  1,  1,  0,  1,  1,  2,  2,  1,  1,  1,  1,  3,  3,

  1113.      1,  1,  2,  2,  1,  1,  4,  4,  1,  1,  1,  1,  2,  2,  5,  5,

  1114.      1,  1,  3,  3,  1,  1,  6,  6,  1,  2,  1,  2,  7,  7,  1,  1,

  1115.      8,  8,  1,  1,  4,  2,  1,  4,  2,  1,  3,  3,  1,  1,  1,  9,

  1116.      9,  1,  2,  1,  2,  1,  5,  5,  1,  1, 10, 10,  1,  1,  3,  3,

  1117.      2,  2,  1,  1, 11, 11,  6,  4,  4,  1,  6,  1,  2,  1,  2, 12,

  1118.      8,  1, 12,  7,  8,  7,  1, 16,  1, 16,  1,  3,  3, 13,  1, 13,

  1119.      2,  2,  1, 15,  1,  5, 14, 15,  1,  5, 14,  1, 17,  8, 17,  8,

  1120.      1,  4,  4,  2,  2,  1, 25, 25, 24, 24,  1,  3,  1,  3,  1,  8,

  1121.      6,  7,  6,  1, 18,  8, 18,  1,  7, 23,  2,  2, 23,  1,  1, 21,

  1122.     22,  9,  9, 22, 19,  1, 21,  5, 19,  5,  1, 33, 20, 33, 20,  8,

  1123.      4,  4,  1, 32,  2,  2,  8,  3, 32, 26,  3,  1,  7,  7, 26,  6,

  1124.      1,  6,  1,  1, 16,  1, 10,  1, 10,  2, 16, 29, 28,  2, 29, 28,

  1125.      1, 27,  5,  8,  5, 27,  1,  8,  3,  7,  3, 31, 41, 31,  1, 41,

  1126.      6,  1,  6,  7,  4,  4,  1,  1,  2,  1,  2, 11, 34, 30, 11,  1,

  1127.     30, 15, 15, 34, 36, 40, 36, 40, 35, 35, 37, 37, 39, 39, 38, 38},

  1128. 

  1129.     /* value table */

  1130.     { 1,  -1,   0,   2,  -2,   0,   3,  -3,   1,  -1,   4,  -4,   5,  -5,   1,  -1,

  1131.       6,  -6,   2,  -2,   7,  -7,   1,  -1,   8,  -8,   9,  -9,   3,  -3,   1,  -1,

  1132.      10, -10,   2,  -2,  11, -11,   1,  -1,  12,   4, -12,  -4,   1,  -1,  13, -13,

  1133.       1,  -1,  14, -14,   2,   5,  15,  -2,  -5, -15,  -3,   3,  16, -16,  17,   1,

  1134.      -1, -17,   6,  18,  -6, -18,   2,  -2,  19, -19,   1,  -1,  20, -20,   4,  -4,

  1135.       7,  -7,  21, -21,   1,  -1,   2,   3,  -3,  22,  -2, -22,   8,  23,  -8,   1,

  1136.       2, -23,  -1,   2,  -2,  -2,  24,   1, -24,  -1,  25,   5,  -5,   1, -25,  -1,

  1137.       9,  -9,  26,   1, -26,   3,   1,  -1,  27,  -3,  -1, -27,   1,   3,  -1,  -3,

  1138.      28,  -4,   4,  10, -10, -28,   1,  -1,   1,  -1,  29,   6, -29,  -6,  30,  -4,

  1139.       3,   3,  -3, -30,   1,   4,  -1,  31,  -3,   1,  11, -11,  -1, -31,  32,  -1,

  1140.      -1,   2,  -2,   1,   1, -32,   1,   4,  -1,  -4,  33,  -1,   1,   1,  -1,   5,

  1141.       5,  -5, -33,  -1, -12,  12,  -5,  -7,   1,   1,   7,  34,   4,  -4,  -1,   4,

  1142.     -34,  -4,  35,  36,  -2, -35,  -2, -36,   2,  13,   2,  -1,   1, -13,   1,  -1,

  1143.      37,   1,  -5,   6,   5,  -1,  38,  -6,  -8,   5,   8,  -1,   1,   1, -37,  -1,

  1144.       5,  39,  -5,  -5,   6,  -6, -38, -39, -14,  40,  14,   2,   1,   1,  -2, -40,

  1145.      -1,  -2,   2,  -1,  -1,  -1,   1,   1,   1,  -1,   1,  -1,   1,  -1,   1,  -1}

  1146. },{

  1147.     /* MapTab1 */

  1148.     0,  /* eob_sym */

  1149.     38, /* esc_sym */

  1150.     /* run table */

  1151.     {0,  1,  1,  2,  2,  3,  3,  4,  4,  5,  5,  6,  8,  6,  8,  7,

  1152.      7,  9,  9, 10, 10, 11, 11,  1, 12,  1, 12, 13, 13, 16, 14, 16,

  1153.     14, 15, 15, 17, 17, 18,  0, 18, 19, 20, 21, 19, 22, 21, 20, 22,

  1154.     25, 24,  2, 25, 24, 23, 23,  2, 26, 28, 26, 28, 29, 27, 29, 27,

  1155.     33, 33,  1, 32,  1,  3, 32, 30, 36,  3, 36, 30, 31, 31, 35, 34,

  1156.     37, 41, 34, 35, 37,  4, 41,  4, 49,  8,  8, 49, 40, 38,  5, 38,

  1157.     40, 39,  5, 39, 42, 43, 42,  7, 57,  6, 43, 44,  6, 50,  7, 44,

  1158.     57, 48, 50, 48, 45, 45, 46, 47, 51, 46, 47, 58,  1, 51, 58,  1,

  1159.     52, 59, 53,  9, 52, 55, 55, 59, 53, 56, 54, 56, 54,  9, 64, 64,

  1160.     60, 63, 60, 63, 61, 62, 61, 62,  2, 10,  2, 10, 11,  1, 11, 13,

  1161.     12,  1, 12, 13, 16, 16,  8,  8, 14,  3,  3, 15, 14, 15,  4,  4,

  1162.      1, 17, 17,  5,  1,  7,  7,  5,  6,  1,  2,  2,  6, 22,  1, 25,

  1163.     21, 22,  8, 24,  1, 21, 25, 24,  8, 18, 18, 23,  9, 20, 23, 33,

  1164.     29, 33, 20,  1, 19,  1, 29, 36,  9, 36, 19, 41, 28, 57, 32,  3,

  1165.     28,  3,  1, 27, 49, 49,  1, 32, 26, 26,  2,  4,  4,  7, 57, 41,

  1166.      2,  7, 10,  5, 37, 16, 10, 27,  8,  8, 13, 16, 37, 13,  1,  5},

  1167. 

  1168.     /* value table */

  1169.     {0,   1,  -1,   1,  -1,   1,  -1,   1,  -1,   1,  -1,   1,   1,  -1,  -1,   1,

  1170.     -1,   1,  -1,   1,  -1,   1,  -1,   2,   1,  -2,  -1,   1,  -1,   1,   1,  -1,

  1171.     -1,   1,  -1,   1,  -1,   1,   0,  -1,   1,   1,   1,  -1,   1,  -1,  -1,  -1,

  1172.      1,   1,   2,  -1,  -1,   1,  -1,  -2,   1,   1,  -1,  -1,   1,   1,  -1,  -1,

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

  1174.      1,   1,  -1,  -1,  -1,   2,  -1,  -2,   1,   2,  -2,  -1,   1,   1,   2,  -1,

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

  1176.     -1,   1,   1,  -1,   1,  -1,   1,   1,   1,  -1,  -1,   1,   4,  -1,  -1,  -4,

  1177.      1,   1,   1,   2,  -1,  -1,   1,  -1,  -1,   1,  -1,  -1,   1,  -2,   1,  -1,

  1178.      1,   1,  -1,  -1,   1,   1,  -1,  -1,   3,   2,  -3,  -2,   2,   5,  -2,   2,

  1179.      2,  -5,  -2,  -2,  -2,   2,  -3,   3,   2,   3,  -3,   2,  -2,  -2,   3,  -3,

  1180.      6,   2,  -2,   3,  -6,   3,  -3,  -3,   3,   7,  -4,   4,  -3,   2,  -7,   2,

  1181.      2,  -2,  -4,   2,   8,  -2,  -2,  -2,   4,   2,  -2,   2,   3,   2,  -2,  -2,

  1182.      2,   2,  -2,  -8,  -2,   9,  -2,   2,  -3,  -2,   2,  -2,   2,   2,   2,   4,

  1183.     -2,  -4,  10,   2,   2,  -2,  -9,  -2,   2,  -2,   5,   4,  -4,   4,  -2,   2,

  1184.     -5,  -4,  -3,   4,   2,  -3,   3,  -2,  -5,   5,   3,   3,  -2,  -3, -10,  -4}

  1185. },{

  1186.     /* MapTab2 */

  1187.     2,  /* eob_sym */

  1188.     11, /* esc_sym */

  1189.     /* run table */

  1190.     {1,  1,  0,  2,  2,  1,  1,  3,  3,  4,  4,  0,  1,  1,  5,  5,

  1191.      2,  2,  6,  6,  7,  7,  1,  8,  1,  8,  3,  3,  9,  9,  1,  2,

  1192.      2,  1,  4, 10,  4, 10, 11, 11,  1,  5, 12, 12,  1,  5, 13, 13,

  1193.      3,  3,  6,  6,  2,  2, 14, 14, 16, 16, 15,  7, 15,  8,  8,  7,

  1194.      1,  1, 17, 17,  4,  4,  1,  1, 18, 18,  2,  2,  5,  5, 25,  3,

  1195.      9,  3, 25,  9, 19, 24, 19, 24,  1, 21, 20,  1, 21, 22, 20, 22,

  1196.     23, 23,  8,  6, 33,  6,  8, 33,  7,  7, 26, 26,  1, 32,  1, 32,

  1197.     28,  4, 28, 10, 29, 27, 27, 10, 41,  4, 29,  2,  2, 41, 36, 31,

  1198.     49, 31, 34, 30, 34, 36, 30, 35,  1, 49, 11,  5, 35, 11,  1,  3,

  1199.      3,  5, 37, 37,  8, 40,  8, 40, 12, 12, 42, 42,  1, 38, 16, 57,

  1200.      1,  6, 16, 39, 38,  6,  7,  7, 13, 13, 39, 43,  2, 43, 57,  2,

  1201.     50,  9, 44,  9, 50,  4, 15, 48, 44,  4,  1, 15, 48, 14, 14,  1,

  1202.     45, 45,  8,  3,  5,  8, 51, 47,  3, 46, 46, 47,  5, 51,  1, 17,

  1203.     17, 58,  1, 58,  2, 52, 52,  2, 53,  7, 59,  6,  6, 56, 53, 55,

  1204.      7, 55,  1, 54, 59, 56, 54, 10,  1, 10,  4, 60,  1, 60,  8,  4,

  1205.      8, 64, 64, 61,  1, 63,  3, 63, 62, 61,  5, 11,  5,  3, 11, 62},

  1206. 

  1207.     /* value table */

  1208.     { 1,  -1,   0,   1,  -1,   2,  -2,   1,  -1,   1,  -1,   0,   3,  -3,   1,  -1,

  1209.       2,  -2,   1,  -1,   1,  -1,   4,   1,  -4,  -1,   2,  -2,   1,  -1,   5,   3,

  1210.      -3,  -5,   2,   1,  -2,  -1,   1,  -1,   6,   2,   1,  -1,  -6,  -2,   1,  -1,

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

  1212.       7,  -7,   1,  -1,   3,  -3,   8,  -8,   1,  -1,   5,  -5,   3,  -3,   1,   4,

  1213.       2,  -4,  -1,  -2,   1,   1,  -1,  -1,   9,   1,   1,  -9,  -1,   1,  -1,  -1,

  1214.       1,  -1,   3,  -3,   1,   3,  -3,  -1,   3,  -3,   1,  -1,  10,   1, -10,  -1,

  1215.       1,   4,  -1,   2,   1,  -1,   1,  -2,   1,  -4,  -1,   6,  -6,  -1,   1,   1,

  1216.       1,  -1,   1,   1,  -1,  -1,  -1,   1,  11,  -1,  -2,   4,  -1,   2, -11,   5,

  1217.      -5,  -4,  -1,   1,   4,   1,  -4,  -1,  -2,   2,   1,  -1,  12,   1,  -2,   1,

  1218.     -12,   4,   2,   1,  -1,  -4,   4,  -4,   2,  -2,  -1,   1,   7,  -1,  -1,  -7,

  1219.      -1,  -3,   1,   3,   1,   5,   2,   1,  -1,  -5,  13,  -2,  -1,   2,  -2, -13,

  1220.       1,  -1,   5,   6,   5,  -5,   1,   1,  -6,   1,  -1,  -1,  -5,  -1,  14,   2,

  1221.      -2,   1, -14,  -1,   8,   1,  -1,  -8,   1,   5,   1,   5,  -5,   1,  -1,   1,

  1222.      -5,  -1,  15,   1,  -1,  -1,  -1,   3, -15,  -3,   6,   1,  16,  -1,   6,  -6,

  1223.      -6,   1,  -1,   1, -16,   1,   7,  -1,   1,  -1,  -6,  -3,   6,  -7,   3,  -1}

  1224. },{

  1225.     /* MapTab3 */

  1226.     0,  /* eob_sym */

  1227.     35, /* esc_sym */

  1228.     /* run table */

  1229.     {0,  1,  1,  2,  2,  3,  3,  4,  4,  1,  1,  5,  5,  6,  6,  7,

  1230.      7,  8,  8,  9,  9,  2,  2, 10, 10,  1,  1, 11, 11, 12, 12,  3,

  1231.      3, 13, 13,  0, 14, 14, 16, 15, 16, 15,  4,  4, 17,  1, 17,  1,

  1232.      5,  5, 18, 18,  2,  2,  6,  6,  8, 19,  7,  8,  7, 19, 20, 20,

  1233.     21, 21, 22, 24, 22, 24, 23, 23,  1,  1, 25, 25,  3,  3, 26, 26,

  1234.      9,  9, 27, 27, 28, 28, 33, 29,  4, 33, 29,  1,  4,  1, 32, 32,

  1235.      2,  2, 31, 10, 30, 10, 30, 31, 34, 34,  5,  5, 36, 36, 35, 41,

  1236.     35, 11, 41, 11, 37,  1,  8,  8, 37,  6,  1,  6, 40,  7,  7, 40,

  1237.     12, 38, 12, 39, 39, 38, 49, 13, 49, 13,  3, 42,  3, 42, 16, 16,

  1238.     43, 43, 14, 14,  1,  1, 44, 15, 44, 15,  2,  2, 57, 48, 50, 48,

  1239.     57, 50,  4, 45, 45,  4, 46, 47, 47, 46,  1, 51,  1, 17, 17, 51,

  1240.      8,  9,  9,  5, 58,  8, 58,  5, 52, 52, 55, 56, 53, 56, 55, 59,

  1241.     59, 53, 54,  1,  6, 54,  7,  7,  6,  1,  2,  3,  2,  3, 64, 60,

  1242.     60, 10, 10, 64, 61, 62, 61, 63,  1, 63, 62,  1, 18, 24, 18,  4,

  1243.     25,  4,  8, 21, 21,  1, 24, 22, 25, 22,  8, 11, 19, 11, 23,  1,

  1244.     20, 23, 19, 20,  5, 12,  5,  1, 16,  2, 12, 13,  2, 13,  1, 16},

  1245. 

  1246.     /* value table */

  1247.     { 0,   1,  -1,   1,  -1,   1,  -1,   1,  -1,   2,  -2,   1,  -1,   1,  -1,   1,

  1248.      -1,   1,  -1,   1,  -1,   2,  -2,   1,  -1,   3,  -3,   1,  -1,   1,  -1,   2,

  1249.      -2,   1,  -1,   0,   1,  -1,   1,   1,  -1,  -1,   2,  -2,   1,   4,  -1,  -4,

  1250.       2,  -2,   1,  -1,  -3,   3,   2,  -2,   2,   1,   2,  -2,  -2,  -1,   1,  -1,

  1251.       1,  -1,   1,   1,  -1,  -1,   1,  -1,   5,  -5,   1,  -1,   3,  -3,   1,  -1,

  1252.       2,  -2,   1,  -1,   1,  -1,   1,   1,   3,  -1,  -1,   6,  -3,  -6,  -1,   1,

  1253.       4,  -4,   1,   2,   1,  -2,  -1,  -1,   1,  -1,   3,  -3,   1,  -1,   1,   1,

  1254.      -1,   2,  -1,  -2,   1,   7,  -3,   3,  -1,   3,  -7,  -3,   1,  -3,   3,  -1,

  1255.       2,   1,  -2,   1,  -1,  -1,   1,   2,  -1,  -2,  -4,  -1,   4,   1,   2,  -2,

  1256.       1,  -1,  -2,   2,   8,  -8,  -1,   2,   1,  -2,  -5,   5,   1,  -1,  -1,   1,

  1257.      -1,   1,   4,  -1,   1,  -4,  -1,  -1,   1,   1,   9,   1,  -9,   2,  -2,  -1,

  1258.      -4,   3,  -3,  -4,  -1,   4,   1,   4,   1,  -1,   1,  -1,   1,   1,  -1,   1,

  1259.      -1,  -1,  -1,  10,   4,   1,   4,  -4,  -4, -10,   6,   5,  -6,  -5,   1,  -1,

  1260.       1,   3,  -3,  -1,   1,  -1,  -1,  -1,  11,   1,   1, -11,  -2,  -2,   2,   5,

  1261.      -2,  -5,  -5,   2,  -2,  12,   2,  -2,   2,   2,   5,  -3,  -2,   3,  -2, -12,

  1262.      -2,   2,   2,   2,  -5,   3,   5,  13,  -3,   7,  -3,  -3,  -7,   3, -13,   3}

  1263. },{

  1264.     /* MapTab4 */

  1265.     0,  /* eob_sym */

  1266.     34, /* esc_sym */

  1267.     /* run table */

  1268.     {0,  1,  1,  1,  2,  2,  1,  3,  3,  1,  1,  1,  4,  4,  1,  5,

  1269.      2,  1,  5,  2,  1,  1,  6,  6,  1,  1,  1,  1,  1,  7,  3,  1,

  1270.      2,  3,  0,  1,  2,  7,  1,  1,  1,  8,  1,  1,  8,  1,  1,  1,

  1271.      9,  1,  9,  1,  2,  1,  1,  2,  1,  1, 10,  4,  1, 10,  1,  4,

  1272.      1,  1,  1,  1,  1,  3,  1,  1,  1,  3,  2,  1,  5,  1,  1,  1,

  1273.      2,  5,  1, 11,  1, 11,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,

  1274.      2,  1,  6,  1,  6,  1,  1,  2,  1,  1,  1,  1,  1,  1,  1, 12,

  1275.      3,  1, 12,  1,  1,  1,  2,  1,  1,  3,  1,  1,  1,  1,  1,  1,

  1276.      4,  1,  1,  1,  2,  1,  1,  4,  1,  1,  1,  1,  1,  1,  2,  1,

  1277.      1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  3,  1,  2,  1,  1,  5,

  1278.      1,  1,  1,  1,  1,  7,  1,  7,  1,  1,  2,  3,  1,  1,  1,  1,

  1279.      5,  1,  1,  1,  1,  1,  1,  2, 13,  1,  1,  1,  1,  1,  1,  1,

  1280.      1,  1,  1,  1,  1,  1,  1,  1, 13,  2,  1,  1,  4,  1,  1,  1,

  1281.      3,  1,  6,  1,  1,  1, 14,  1,  1,  1,  1,  1, 14,  6,  1,  1,

  1282.      1,  1, 15,  2,  4,  1,  2,  3, 15,  1,  1,  1,  8,  1,  1,  8,

  1283.      1,  1,  1,  1,  1,  1,  1,  1,  2,  1,  1,  1,  1,  1,  1,  1},

  1284. 

  1285.     /* value table */

  1286.     { 0,   1,  -1,   2,   1,  -1,  -2,   1,  -1,   3,  -3,   4,   1,  -1,  -4,   1,

  1287.       2,   5,  -1,  -2,  -5,   6,   1,  -1,  -6,   7,  -7,   8,  -8,   1,   2,   9,

  1288.       3,  -2,   0,  -9,  -3,  -1,  10, -10,  11,   1, -11,  12,  -1, -12,  13, -13,

  1289.       1,  14,  -1, -14,   4,  15, -15,  -4,  16, -16,   1,   2,  17,  -1, -17,  -2,

  1290.      18, -18,  19, -19,  20,   3, -20,  21, -21,  -3,   5,  22,   2, -22, -23,  23,

  1291.      -5,  -2,  24,   1, -24,  -1,  25, -25,  26, -26, -27,  27,  28,  29, -28, -29,

  1292.       6,  30,   2, -31,  -2, -30,  31,  -6, -32,  32,  33, -33,  34, -35, -34,   1,

  1293.       4, -36,  -1,  35,  37,  36,   7, -37,  38,  -4, -38,  39,  41,  40, -40, -39,

  1294.       3,  42, -43, -41,  -7, -42,  43,  -3,  44, -44,  45, -45,  46,  47,   8, -47,

  1295.     -48, -46,  50, -50,  48,  49,  51, -49,  52, -52,   5, -51,  -8, -53,  53,   3,

  1296.     -56,  56,  55,  54, -54,   2,  60,  -2, -55,  58,   9,  -5,  59,  57, -57, -63,

  1297.      -3, -58, -60, -61,  61, -59, -62,  -9,   1,  64,  62,  69, -64,  63,  65, -67,

  1298.     -68,  66, -65,  68, -66, -69,  67, -70,  -1,  10,  71, -71,   4,  73,  72,  70,

  1299.       6, -76,  -3,  74, -78, -74,   1,  78,  80, -72, -75,  76,  -1,   3, -73,  79,

  1300.      75,  77,   1,  11,  -4, -79, -10,  -6,  -1, -77, -83, -80,   2,  81, -84,  -2,

  1301.      83, -81,  82, -82,  84, -87, -86,  85, -11, -85,  86, -89,  87, -88,  88,  89}

  1302. },{

  1303.     /* MapTab5 */

  1304.     2,  /* eob_sym */

  1305.     33, /* esc_sym */

  1306.     /* run table */

  1307.     {1,  1,  0,  2,  1,  2,  1,  3,  3,  1,  1,  4,  4,  2,  2,  1,

  1308.      1,  5,  5,  6,  1,  6,  1,  7,  7,  3,  3,  2,  8,  2,  8,  1,

  1309.      1,  0,  9,  9,  1,  1, 10,  4, 10,  4, 11, 11,  2,  1,  2,  1,

  1310.     12, 12,  3,  3,  1,  1, 13,  5,  5, 13, 14,  1,  1, 14,  2,  2,

  1311.      6,  6, 15,  1,  1, 15, 16,  4,  7, 16,  4,  7,  1,  1,  3,  3,

  1312.      8,  8,  2,  2,  1,  1, 17, 17,  1,  1, 18, 18,  5,  5,  2,  2,

  1313.      1,  1,  9, 19,  9, 19, 20,  3,  3, 20,  1, 10, 21,  1, 10,  4,

  1314.      4, 21, 22,  6,  6, 22,  1,  1, 23, 24,  2,  2, 23, 24, 11,  1,

  1315.      1, 11,  7, 25,  7,  1,  1, 25,  8,  8,  3, 26,  3,  1, 12,  2,

  1316.      2, 26,  1, 12,  5,  5, 27,  4,  1,  4,  1, 27, 28,  1, 28, 13,

  1317.      1, 13,  2, 29,  2,  1, 32,  6,  1, 30, 14, 29, 14,  6,  3, 31,

  1318.      3,  1, 30,  1, 32, 31, 33,  9, 33,  1,  1,  7,  9,  7,  2,  2,

  1319.      1,  1,  4, 36, 34,  4,  5, 10, 10,  5, 34,  1,  1, 35,  8,  8,

  1320.     36,  3, 35,  1, 15,  3,  2,  1, 16, 15, 16,  2, 37,  1, 37,  1,

  1321.      1,  1,  6,  6, 38,  1, 38, 11,  1, 39, 39, 40, 11,  2, 41,  4,

  1322.     40,  1,  2,  4,  1,  1,  1, 41,  3,  1,  3,  1,  5,  7,  5,  7},

  1323. 

  1324.     /* value table */

  1325.     { 1,  -1,   0,   1,   2,  -1,  -2,   1,  -1,   3,  -3,   1,  -1,   2,  -2,   4,

  1326.      -4,   1,  -1,   1,   5,  -1,  -5,   1,  -1,   2,  -2,   3,   1,  -3,  -1,   6,

  1327.      -6,   0,   1,  -1,   7,  -7,   1,   2,  -1,  -2,   1,  -1,   4,   8,  -4,  -8,

  1328.       1,  -1,   3,  -3,   9,  -9,   1,   2,  -2,  -1,   1,  10, -10,  -1,   5,  -5,

  1329.       2,  -2,   1,  11, -11,  -1,   1,   3,   2,  -1,  -3,  -2,  12, -12,   4,  -4,

  1330.       2,  -2,  -6,   6,  13, -13,   1,  -1,  14, -14,   1,  -1,   3,  -3,   7,  -7,

  1331.      15, -15,   2,   1,  -2,  -1,   1,   5,  -5,  -1, -16,   2,   1,  16,  -2,   4,

  1332.      -4,  -1,   1,   3,  -3,  -1,  17, -17,   1,   1,  -8,   8,  -1,  -1,   2,  18,

  1333.     -18,  -2,   3,   1,  -3,  19, -19,  -1,   3,  -3,   6,   1,  -6,  20,   2,   9,

  1334.      -9,  -1, -20,  -2,   4,  -4,   1,  -5,  21,   5, -21,  -1,   1, -22,  -1,   2,

  1335.      22,  -2,  10,   1, -10,  23,   1,   4, -23,   1,   2,  -1,  -2,  -4,  -7,   1,

  1336.       7, -24,  -1,  24,  -1,  -1,   1,   3,  -1, -25,  25,   4,  -3,  -4,  11, -11,

  1337.      26, -26,   6,   1,   1,  -6,  -5,  -3,   3,   5,  -1, -27,  27,   1,   4,  -4,

  1338.      -1,  -8,  -1,  28,   2,   8, -12, -28,  -2,  -2,   2,  12,  -1,  29,   1, -29,

  1339.      30, -30,   5,  -5,   1, -31,  -1,   3,  31,  -1,   1,   1,  -3, -13,   1,  -7,

  1340.      -1, -32,  13,   7,  32,  33, -33,  -1,  -9, -34,   9,  34,  -6,   5,   6,  -5}

  1341. },{

  1342.     /* MapTab6 */

  1343.     2,  /* eob_sym */

  1344.     13, /* esc_sym */

  1345.     /* run table */

  1346.     {1,  1,  0,  1,  1,  2,  2,  1,  1,  3,  3,  1,  1,  0,  2,  2,

  1347.      4,  1,  4,  1,  1,  1,  5,  5,  1,  1,  6,  6,  2,  2,  1,  1,

  1348.      3,  3,  7,  7,  1,  1,  8,  8,  1,  1,  2,  2,  1,  9,  1,  9,

  1349.      4,  4, 10,  1,  1, 10,  1,  1, 11, 11,  3,  3,  1,  2,  1,  2,

  1350.      1,  1, 12, 12,  5,  5,  1,  1, 13,  1,  1, 13,  2,  2,  1,  1,

  1351.      6,  6,  1,  1,  4, 14,  4, 14,  3,  1,  3,  1,  1,  1, 15,  7,

  1352.     15,  2,  2,  7,  1,  1,  1,  8,  1,  8, 16, 16,  1,  1,  1,  1,

  1353.      2,  1,  1,  2,  1,  1,  3,  5,  5,  3,  4,  1,  1,  4,  1,  1,

  1354.     17, 17,  9,  1,  1,  9,  2,  2,  1,  1, 10, 10,  1,  6,  1,  1,

  1355.      6, 18,  1,  1, 18,  1,  1,  1,  2,  2,  3,  1,  3,  1,  1,  1,

  1356.      4,  1, 19,  1, 19,  7,  1,  1, 20,  1,  4, 20,  1,  7, 11,  2,

  1357.      1, 11, 21,  2,  8,  5,  1,  8,  1,  5, 21,  1,  1,  1, 22,  1,

  1358.      1, 22,  1,  1,  3,  3,  1, 23,  2, 12, 24,  1,  1,  2,  1,  1,

  1359.     12, 23,  1,  1, 24,  1,  1,  1,  4,  1,  1,  1,  2,  1,  6,  6,

  1360.      4,  2,  1,  1,  1,  1,  1,  1,  1, 14, 13,  3,  1, 25,  9, 25,

  1361.     14,  1,  9,  3, 13,  1,  1,  1,  1,  1, 10,  1,  1,  2, 10,  2},

  1362. 

  1363.     /* value table */

  1364.     {-20,  -1,   0,   2,  -2,   1,  -1,   3,  -3,   1,  -1,   4,  -4,   0,   2,  -2,

  1365.        1,   5,  -1,  -5,   6,  -6,   1,  -1,   7,  -7,   1,  -1,   3,  -3,   8,  -8,

  1366.        2,  -2,   1,  -1,   9,  -9,   1,  -1,  10, -10,   4,  -4,  11,   1, -11,  -1,

  1367.        2,  -2,   1,  12, -12,  -1,  13, -13,   1,  -1,   3,  -3,  14,   5, -14,  -5,

  1368.      -15,  15,  -1,   1,   2,  -2,  16, -16,   1,  17, -17,  -1,   6,  -6,  18, -18,

  1369.        2,  -2, -19,  19,  -3,   1,   3,  -1,   4,  20,  -4,   1, -21,  21,   1,   2,

  1370.       -1,  -7,   7,  -2,  22, -22,  23,   2, -23,  -2,   1,  -1, -24,  24, -25,  25,

  1371.       -8, -26,  26,   8, -27,  27,   5,   3,  -3,  -5,  -4,  28, -28,   4,  29, -29,

  1372.        1,  -1,  -2, -30,  30,   2,   9,  -9, -31,  31,   2,  -2, -32,   3,  32, -33,

  1373.       -3,   1,  33, -34,  -1,  34, -35,  35, -10,  10,  -6,  36,   6, -36,  37, -37,

  1374.       -5,  38,   1, -38,  -1,   3,  39, -39,  -1,  40,   5,   1, -40,  -3,   2, -11,

  1375.      -41,  -2,   1,  11,  -3,  -4,  41,   3,  42,   4,  -1, -43, -42,  43,   1, -44,

  1376.       45,  -1,  44, -45,  -7,   7, -46,   1, -12,   2,   1, -47,  46,  12,  47,  48,

  1377.       -2,  -1, -48,  49,  -1, -50, -49,  50,  -6, -51,  51,  52, -13,  53,  -4,   4,

  1378.        6,  13, -53, -52, -54,  55,  54, -55, -56,  -2,   2,  -8,  56,   1,  -3,  -1,

  1379.        2,  58,   3,   8,  -2,  57, -58, -60, -59, -57,  -3,  60,  59, -14,   3,  14}

  1380. },{

  1381.     /* MapTab7 */

  1382.     2,  /* eob_sym */

  1383.     38, /* esc_sym */

  1384.     /* run table */

  1385.     {1,  1,  0,  2,  2,  1,  1,  3,  3,  4,  4,  5,  5,  1,  1,  6,

  1386.      6,  2,  2,  7,  7,  8,  8,  1,  1,  3,  3,  9,  9, 10, 10,  1,

  1387.      1,  2,  2,  4,  4, 11,  0, 11, 12, 12, 13, 13,  1,  1,  5,  5,

  1388.     14, 14, 15, 16, 15, 16,  3,  3,  1,  6,  1,  6,  2,  2,  7,  7,

  1389.      8,  8, 17, 17,  1,  1,  4,  4, 18, 18,  2,  2,  1, 19,  1, 20,

  1390.     19, 20, 21, 21,  3,  3, 22, 22,  5,  5, 24,  1,  1, 23,  9, 23,

  1391.     24,  9,  2,  2, 10,  1,  1, 10,  6,  6, 25,  4,  4, 25,  7,  7,

  1392.     26,  8,  1,  8,  3,  1, 26,  3, 11, 11, 27, 27,  2, 28,  1,  2,

  1393.     28,  1, 12, 12,  5,  5, 29, 13, 13, 29, 32,  1,  1, 33, 31, 30,

  1394.     32,  4, 30, 33,  4, 31,  3, 14,  1,  1,  3, 34, 34,  2,  2, 14,

  1395.      6,  6, 35, 36, 35, 36,  1, 15,  1, 16, 16, 15,  7,  9,  7,  9,

  1396.     37,  8,  8, 37,  1,  1, 39,  2, 38, 39,  2, 40,  5, 38, 40,  5,

  1397.      3,  3,  4,  4, 10, 10,  1,  1,  1,  1, 41,  2, 41,  2,  6,  6,

  1398.      1,  1, 11, 42, 11, 43,  3, 42,  3, 17,  4, 43,  1, 17,  7,  1,

  1399.      8, 44,  4,  7, 44,  5,  8,  2,  5,  1,  2, 48, 45,  1, 12, 45,

  1400.     12, 48, 13, 13,  1,  9,  9, 46,  1, 46, 47, 47, 49, 18, 18, 49},

  1401. 

  1402.     /* value table */

  1403.     { 1,  -1,   0,   1,  -1,   2,  -2,   1,  -1,   1,  -1,   1,  -1,   3,  -3,   1,

  1404.      -1,  -2,   2,   1,  -1,   1,  -1,   4,  -4,  -2,   2,   1,  -1,   1,  -1,   5,

  1405.      -5,  -3,   3,   2,  -2,   1,   0,  -1,   1,  -1,   1,  -1,   6,  -6,   2,  -2,

  1406.       1,  -1,   1,   1,  -1,  -1,  -3,   3,   7,   2,  -7,  -2,  -4,   4,   2,  -2,

  1407.       2,  -2,   1,  -1,   8,  -8,   3,  -3,   1,  -1,  -5,   5,   9,   1,  -9,   1,

  1408.      -1,  -1,   1,  -1,  -4,   4,   1,  -1,   3,  -3,   1, -10,  10,   1,   2,  -1,

  1409.      -1,  -2,   6,  -6,   2,  11, -11,  -2,   3,  -3,   1,  -4,   4,  -1,   3,  -3,

  1410.       1,   3,  12,  -3,  -5, -12,  -1,   5,   2,  -2,   1,  -1,  -7,   1,  13,   7,

  1411.      -1, -13,   2,  -2,   4,  -4,   1,   2,  -2,  -1,   1,  14, -14,   1,   1,   1,

  1412.      -1,  -5,  -1,  -1,   5,  -1,  -6,   2, -15,  15,   6,   1,  -1,  -8,   8,  -2,

  1413.      -4,   4,   1,   1,  -1,  -1,  16,   2, -16,  -2,   2,  -2,   4,   3,  -4,  -3,

  1414.      -1,  -4,   4,   1, -17,  17,  -1,  -9,   1,   1,   9,   1,  -5,  -1,  -1,   5,

  1415.      -7,   7,   6,  -6,   3,  -3,  18, -18,  19, -19,   1, -10,  -1,  10,  -5,   5,

  1416.      20, -20,  -3,   1,   3,   1,   8,  -1,  -8,   2,   7,  -1, -21,  -2,   5,  21,

  1417.       5,  -1,  -7,  -5,   1,  -6,  -5, -11,   6,  22,  11,   1,   1, -22,  -3,  -1,

  1418.       3,  -1,   3,  -3, -23,   4,  -4,   1,  23,  -1,   1,  -1,   1,  -2,   2,  -1}

  1419. },{

  1420.     /* MapTab8 */

  1421.     4,  /* eob_sym */

  1422.     11, /* esc_sym */

  1423.     /* run table */

  1424.     {1,  1,  1,  1,  0,  2,  2,  1,  1,  3,  3,  0,  1,  1,  2,  2,

  1425.      4,  4,  1,  1,  5,  5,  1,  1,  2,  2,  3,  3,  6,  6,  1,  1,

  1426.      7,  7,  8,  1,  8,  2,  2,  1,  4,  4,  1,  3,  1,  3,  9,  9,

  1427.      2,  2,  1,  5,  1,  5, 10, 10,  1,  1, 11, 11,  3,  6,  3,  4,

  1428.      4,  6,  2,  2,  1, 12,  1, 12,  7, 13,  7, 13,  1,  1,  8,  8,

  1429.      2,  2, 14, 14, 16, 15, 16,  5,  5,  1,  3, 15,  1,  3,  4,  4,

  1430.      1,  1, 17, 17,  2,  2,  6,  6,  1, 18,  1, 18, 22, 21, 22, 21,

  1431.     25, 24, 25, 19,  9, 20,  9, 23, 19, 24, 20,  3, 23,  7,  3,  1,

  1432.      1,  7, 28, 26, 29,  5, 28, 26,  5,  8, 29,  4,  8, 27,  2,  2,

  1433.      4, 27,  1,  1, 10, 36, 10, 33, 33, 36, 30,  1, 32, 32,  1, 30,

  1434.      6, 31, 31, 35,  3,  6, 11, 11,  3,  2, 35,  2, 34,  1, 34,  1,

  1435.     37, 37, 12,  7, 12,  5, 41,  5,  4,  7,  1,  8, 13,  4,  1, 41,

  1436.     13, 38,  8, 38,  9,  1, 40, 40,  9,  1, 39,  2,  2, 49, 39, 42,

  1437.      3,  3, 14, 16, 49, 14, 16, 42, 43, 43,  6,  6, 15,  1,  1, 15,

  1438.     44, 44,  1,  1, 50, 48,  4,  5,  4,  7,  5,  2, 10, 10, 48,  7,

  1439.     50, 45,  2,  1, 45,  8,  8,  1, 46, 46,  3, 47, 47,  3,  1,  1},

  1440. 

  1441.     /* value table */

  1442.     { 1,  -1,   2,  -2,   0,   1,  -1,   3,  -3,   1,  -1,   0,   4,  -4,   2,  -2,

  1443.       1,  -1,   5,  -5,   1,  -1,   6,  -6,   3,  -3,   2,  -2,   1,  -1,   7,  -7,

  1444.       1,  -1,   1,   8,  -1,   4,  -4,  -8,   2,  -2,   9,   3,  -9,  -3,   1,  -1,

  1445.       5,  -5,  10,   2, -10,  -2,   1,  -1,  11, -11,   1,  -1,  -4,   2,   4,   3,

  1446.      -3,  -2,   6,  -6,  12,   1, -12,  -1,   2,   1,  -2,  -1,  13, -13,   2,  -2,

  1447.       7,  -7,   1,  -1,   1,   1,  -1,   3,  -3,  14,   5,  -1, -14,  -5,   4,  -4,

  1448.      15, -15,   1,  -1,   8,  -8,  -3,   3,  16,   1, -16,  -1,   1,   1,  -1,  -1,

  1449.       1,   1,  -1,   1,   2,   1,  -2,   1,  -1,  -1,  -1,   6,  -1,   3,  -6,  17,

  1450.     -17,  -3,   1,   1,   1,   4,  -1,  -1,  -4,   3,  -1,   5,  -3,  -1,  -9,   9,

  1451.      -5,   1,  18, -18,   2,   1,  -2,   1,  -1,  -1,   1,  19,  -1,   1, -19,  -1,

  1452.       4,   1,  -1,   1,   7,  -4,  -2,   2,  -7,  10,  -1, -10,   1,  20,  -1, -20,

  1453.       1,  -1,   2,   4,  -2,   5,   1,  -5,   6,  -4,  21,   4,   2,  -6, -21,  -1,

  1454.      -2,   1,  -4,  -1,  -3,  22,  -1,   1,   3, -22,  -1,  11, -11,   1,   1,   1,

  1455.       8,  -8,   2,   2,  -1,  -2,  -2,  -1,   1,  -1,  -5,   5,   2,  23, -23,  -2,

  1456.       1,  -1,  24, -24,  -1,  -1,   7,   6,  -7,   5,  -6,  12,  -3,   3,   1,  -5,

  1457.       1,   1, -12,  25,  -1,  -5,   5, -25,  -1,   1,   9,   1,  -1,  -9,  26, -26}

  1458. }

  1459. };