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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. #include <inttypes.h>

  30. 

  31. #define BITSTREAM_READER_LE

  32. #include "libavutil/attributes.h"

  33. #include "libavutil/timer.h"

  34. #include "avcodec.h"

  35. #include "get_bits.h"

  36. #include "internal.h"

  37. #include "mathops.h"

  38. #include "ivi_common.h"

  39. #include "ivi_dsp.h"

  40. 

  41. /**

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

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

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

  45.  * startup from these descriptors.

  46.  */

  47. /** static macroblock huffman tables */

  48. static const IVIHuffDesc ivi_mb_huff_desc[8] = {

  49.     {8,  {0, 4, 5, 4, 4, 4, 6, 6}},

  50.     {12, {0, 2, 2, 3, 3, 3, 3, 5, 3, 2, 2, 2}},

  51.     {12, {0, 2, 3, 4, 3, 3, 3, 3, 4, 3, 2, 2}},

  52.     {12, {0, 3, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2}},

  53.     {13, {0, 4, 4, 3, 3, 3, 3, 2, 3, 3, 2, 1, 1}},

  54.     {9,  {0, 4, 4, 4, 4, 3, 3, 3, 2}},

  55.     {10, {0, 4, 4, 4, 4, 3, 3, 2, 2, 2}},

  56.     {12, {0, 4, 4, 4, 3, 3, 2, 3, 2, 2, 2, 2}}

  57. };

  58. 

  59. /** static block huffman tables */

  60. static const IVIHuffDesc ivi_blk_huff_desc[8] = {

  61.     {10, {1, 2, 3, 4, 4, 7, 5, 5, 4, 1}},

  62.     {11, {2, 3, 4, 4, 4, 7, 5, 4, 3, 3, 2}},

  63.     {12, {2, 4, 5, 5, 5, 5, 6, 4, 4, 3, 1, 1}},

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

  65.     {11, {3, 4, 4, 5, 5, 5, 6, 5, 4, 2, 2}},

  66.     {13, {3, 4, 5, 5, 5, 5, 6, 4, 3, 3, 2, 1, 1}},

  67.     {13, {3, 4, 5, 5, 5, 6, 5, 4, 3, 3, 2, 1, 1}},

  68.     {9,  {3, 4, 4, 5, 5, 5, 6, 5, 5}}

  69. };

  70. 

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

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

  73. 

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

  75.                              uint32_t pitch, int mc_type);

  76. 

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

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

  79. {

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

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

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

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

  84. 

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

  86.         return AVERROR_INVALIDDATA;

  87.     if (buf_size - min_size < offs)

  88.         return AVERROR_INVALIDDATA;

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

  90.         return AVERROR_INVALIDDATA;

  91. 

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

  93. 

  94.     return 0;

  95. }

  96. 

  97. /**

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

  99.  *  in the least significant bits.

  100.  */

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

  102. {

  103.     uint16_t res;

  104. 

  105.     if (nbits <= 8) {

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

  107.     } else

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

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

  110. 

  111.     return res;

  112. }

  113. 

  114. /*

  115.  *  Generate a huffman codebook from the given descriptor

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

  117.  *

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

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

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

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

  122.  */

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

  124. {

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

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

  127.     uint8_t     bits[256];

  128. 

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

  130. 

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

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

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

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

  135. 

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

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

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

  139. 

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

  141.             if (bits[pos] > IVI_VLC_BITS)

  142.                 return AVERROR_INVALIDDATA; /* invalid descriptor */

  143. 

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

  145.             if (!bits[pos])

  146.                 bits[pos] = 1;

  147. 

  148.             pos++;

  149.         }//for j

  150.     }//for i

  151. 

  152.     /* number of codewords = pos */

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

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

  155. }

  156. 

  157. av_cold void ff_ivi_init_static_vlc(void)

  158. {

  159.     int i;

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

  161.     static int initialized_vlcs = 0;

  162. 

  163.     if (initialized_vlcs)

  164.         return;

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

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

  167.         ivi_mb_vlc_tabs[i].table_allocated = 8192;

  168.         ivi_create_huff_from_desc(&ivi_mb_huff_desc[i],

  169.                                   &ivi_mb_vlc_tabs[i], 1);

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

  171.         ivi_blk_vlc_tabs[i].table_allocated = 8192;

  172.         ivi_create_huff_from_desc(&ivi_blk_huff_desc[i],

  173.                                   &ivi_blk_vlc_tabs[i], 1);

  174.     }

  175.     initialized_vlcs = 1;

  176. }

  177. 

  178. /*

  179.  *  Copy huffman codebook descriptors.

  180.  *

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

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

  183.  */

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

  185. {

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

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

  188. }

  189. 

  190. /*

  191.  *  Compare two huffman codebook descriptors.

  192.  *

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

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

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

  196.  */

  197. static int ivi_huff_desc_cmp(const IVIHuffDesc *desc1,

  198.                              const IVIHuffDesc *desc2)

  199. {

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

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

  202. }

  203. 

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

  205.                          IVIHuffTab *huff_tab, AVCodecContext *avctx)

  206. {

  207.     int i, result;

  208.     IVIHuffDesc new_huff;

  209. 

  210.     if (!desc_coded) {

  211.         /* select default table */

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

  213.                                     : &ivi_mb_vlc_tabs [7];

  214.         return 0;

  215.     }

  216. 

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

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

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

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

  221.         if (!new_huff.num_rows) {

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

  223.             return AVERROR_INVALIDDATA;

  224.         }

  225. 

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

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

  228. 

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

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

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

  232. 

  233.             if (huff_tab->cust_tab.table)

  234.                 ff_free_vlc(&huff_tab->cust_tab);

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

  236.                     &huff_tab->cust_tab, 0);

  237.             if (result) {

  238.                 // reset faulty description

  239.                 huff_tab->cust_desc.num_rows = 0;

  240.                 av_log(avctx, AV_LOG_ERROR,

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

  242.                 return result;

  243.             }

  244.         }

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

  246.     } else {

  247.         /* select one of predefined tables */

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

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

  250.     }

  251. 

  252.     return 0;

  253. }

  254. 

  255. /*

  256.  *  Free planes, bands and macroblocks buffers.

  257.  *

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

  259.  */

  260. static av_cold void ivi_free_buffers(IVIPlaneDesc *planes)

  261. {

  262.     int p, b, t;

  263. 

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

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

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

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

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

  269. 

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

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

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

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

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

  275.         }

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

  277.         planes[p].num_bands = 0;

  278.     }

  279. }

  280. 

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

  282. {

  283.     int p, b;

  284.     uint32_t b_width, b_height, align_fac, width_aligned,

  285.              height_aligned, buf_size;

  286.     IVIBandDesc *band;

  287. 

  288.     ivi_free_buffers(planes);

  289. 

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

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

  292.         return AVERROR_INVALIDDATA;

  293. 

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

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

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

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

  298. 

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

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

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

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

  303. 

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

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

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

  307.             return AVERROR(ENOMEM);

  308. 

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

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

  311.          *  has only half size */

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

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

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

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

  316. 

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

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

  319.         align_fac       = p ? 8 : 16;

  320.         width_aligned   = FFALIGN(b_width , align_fac);

  321.         height_aligned  = FFALIGN(b_height, align_fac);

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

  323. 

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

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

  326.             band->plane    = p;

  327.             band->band_num = b;

  328.             band->width    = b_width;

  329.             band->height   = b_height;

  330.             band->pitch    = width_aligned;

  331.             band->aheight  = height_aligned;

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

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

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

  335.                 return AVERROR(ENOMEM);

  336. 

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

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

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

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

  341.                     return AVERROR(ENOMEM);

  342.             }

  343.             /* reset custom vlc */

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

  345.         }

  346.     }

  347. 

  348.     return 0;

  349. }

  350. 

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

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

  353. {

  354.     int x, y;

  355.     IVITile *tile = band->tiles;

  356. 

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

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

  359.             tile->xpos     = x;

  360.             tile->ypos     = y;

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

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

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

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

  365.             /* calculate number of macroblocks */

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

  367.                                               band->mb_size);

  368. 

  369.             av_freep(&tile->mbs);

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

  371.             if (!tile->mbs)

  372.                 return AVERROR(ENOMEM);

  373. 

  374.             tile->ref_mbs = 0;

  375.             if (p || b) {

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

  377.                     return AVERROR_INVALIDDATA;

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

  379.                 ref_tile++;

  380.             }

  381.             tile++;

  382.         }

  383.     }

  384. 

  385.     return 0;

  386. }

  387. 

  388. av_cold int ff_ivi_init_tiles(IVIPlaneDesc *planes,

  389.                               int tile_width, int tile_height)

  390. {

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

  392.     IVIBandDesc *band;

  393. 

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

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

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

  397. 

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

  399.             t_width  >>= 1;

  400.             t_height >>= 1;

  401.         }

  402. 

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

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

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

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

  407.             band->num_tiles = x_tiles * y_tiles;

  408. 

  409.             av_freep(&band->tiles);

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

  411.             if (!band->tiles)

  412.                 return AVERROR(ENOMEM);

  413. 

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

  415.              * and quant */

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

  417.                                  p, b, t_height, t_width);

  418.             if (ret < 0)

  419.                 return ret;

  420.         }

  421.     }

  422. 

  423.     return 0;

  424. }

  425. 

  426. /*

  427.  *  Decode size of the tile data.

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

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

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

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

  432.  *

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

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

  435.  */

  436. static int ivi_dec_tile_data_size(GetBitContext *gb)

  437. {

  438.     int    len;

  439. 

  440.     len = 0;

  441.     if (get_bits1(gb)) {

  442.         len = get_bits(gb, 8);

  443.         if (len == 255)

  444.             len = get_bits_long(gb, 24);

  445.     }

  446. 

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

  448.     align_get_bits(gb);

  449. 

  450.     return len;

  451. }

  452. 

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

  454.                             int blk_size)

  455. {

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

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

  458. 

  459.     if (!band->dc_transform)

  460.         return 0;

  461. 

  462. 

  463.     if (min_size > buf_size)

  464.         return AVERROR_INVALIDDATA;

  465. 

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

  467.                        band->pitch, blk_size);

  468. 

  469.     return 0;

  470. }

  471. 

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

  473.                                    ivi_mc_func mc, int mv_x, int mv_y,

  474.                                    int *prev_dc, int is_intra, int mc_type,

  475.                                    uint32_t quant, int offs,

  476.                                    AVCodecContext *avctx)

  477. {

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

  479.     RVMapDesc *rvmap = band->rv_map;

  480.     uint8_t col_flags[8];

  481.     int32_t trvec[64];

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

  483.     int pos, run, val;

  484.     int blk_size   = band->blk_size;

  485.     int num_coeffs = blk_size * blk_size;

  486.     int col_mask   = blk_size - 1;

  487.     int scan_pos   = -1;

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

  489.                      band->transform_size;

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

  491. 

  492.     if (min_size > buf_size)

  493.         return AVERROR_INVALIDDATA;

  494. 

  495.     if (!band->scan) {

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

  497.         return AVERROR_INVALIDDATA;

  498.     }

  499. 

  500.     /* zero transform vector */

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

  502.     /* zero column flags */

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

  504.     while (scan_pos <= num_coeffs) {

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

  506.                        IVI_VLC_BITS, 1);

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

  508.             break; /* End of block */

  509. 

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

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

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

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

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

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

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

  517.         } else {

  518.             if (sym >= 256U) {

  519.                 av_log(avctx, AV_LOG_ERROR, "Invalid sym encountered: %"PRIu32".\n", sym);

  520.                 return AVERROR_INVALIDDATA;

  521.             }

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

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

  524.         }

  525. 

  526.         /* de-zigzag and dequantize */

  527.         scan_pos += run;

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

  529.             break;

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

  531. 

  532.         if (!val)

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

  534. 

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

  536.         if (q > 1)

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

  538.         trvec[pos] = val;

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

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

  541.     }

  542. 

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

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

  545. 

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

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

  548.         *prev_dc     += trvec[0];

  549.         trvec[0]      = *prev_dc;

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

  551.     }

  552. 

  553.     /* apply inverse transform */

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

  555.                         band->pitch, col_flags);

  556. 

  557.     /* apply motion compensation */

  558.     if (!is_intra)

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

  560. 

  561.     return 0;

  562. }

  563. /*

  564.  *  Decode block data:

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

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

  567.  *  in order to reconstruct the picture.

  568.  *

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

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

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

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

  573.  */

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

  575.                              IVITile *tile, AVCodecContext *avctx)

  576. {

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

  578.     int mv_x = 0, mv_y = 0;

  579.     int32_t prev_dc;

  580.     uint32_t cbp, quant, buf_offs;

  581.     IVIMbInfo *mb;

  582.     ivi_mc_func mc_with_delta_func, mc_no_delta_func;

  583.     const uint8_t *scale_tab;

  584. 

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

  586.     prev_dc    = 0;

  587.     blk_size   = band->blk_size;

  588.     /* number of blocks per mb */

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

  590.     if (blk_size == 8) {

  591.         mc_with_delta_func = ff_ivi_mc_8x8_delta;

  592.         mc_no_delta_func   = ff_ivi_mc_8x8_no_delta;

  593.     } else {

  594.         mc_with_delta_func = ff_ivi_mc_4x4_delta;

  595.         mc_no_delta_func   = ff_ivi_mc_4x4_no_delta;

  596.     }

  597. 

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

  599.         is_intra = !mb->type;

  600.         cbp      = mb->cbp;

  601.         buf_offs = mb->buf_offs;

  602. 

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

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

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

  606.         else

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

  608. 

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

  610.         if (scale_tab)

  611.             quant = scale_tab[quant];

  612. 

  613.         if (!is_intra) {

  614.             mv_x = mb->mv_x;

  615.             mv_y = mb->mv_y;

  616.             if (band->is_halfpel) {

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

  618.                 mv_x >>= 1;

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

  620.             }

  621.             if (mb->type) {

  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.                     return AVERROR_INVALIDDATA;

  634.                 }

  635.             }

  636.         }

  637. 

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

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

  640.             if (blk & 1) {

  641.                 buf_offs += blk_size;

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

  643.                 buf_offs -= blk_size;

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

  645.             }

  646. 

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

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

  649.                                               mv_x, mv_y, &prev_dc, is_intra,

  650.                                               mc_type, quant, buf_offs, avctx);

  651.                 if (ret < 0)

  652.                     return ret;

  653.             } else {

  654.                 /* block not coded */

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

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

  657.                 if (is_intra) {

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

  659.                     if (ret < 0)

  660.                         return ret;

  661.                 } else {

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

  663.                                  mv_x, mv_y, mc_type);

  664.                     if (ret < 0)

  665.                         return ret;

  666.                 }

  667.             }

  668. 

  669.             cbp >>= 1;

  670.         }// for blk

  671.     }// for mbn

  672. 

  673.     align_get_bits(gb);

  674. 

  675.     return 0;

  676. }

  677. 

  678. /**

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

  680.  *  compensation respectively.

  681.  *

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

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

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

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

  686.  */

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

  688.                                   IVITile *tile, int32_t mv_scale)

  689. {

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

  691.     int             offs, mb_offset, row_offset, ret;

  692.     IVIMbInfo       *mb, *ref_mb;

  693.     const int16_t   *src;

  694.     int16_t         *dst;

  695.     ivi_mc_func     mc_no_delta_func;

  696. 

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

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

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

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

  701.         return AVERROR_INVALIDDATA;

  702.     }

  703. 

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

  705.     mb         = tile->mbs;

  706.     ref_mb     = tile->ref_mbs;

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

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

  709. 

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

  711.         mb_offset = offs;

  712. 

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

  714.             mb->xpos     = x;

  715.             mb->ypos     = y;

  716.             mb->buf_offs = mb_offset;

  717. 

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

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

  720. 

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

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

  723.                 mb->mv_x    = 0;

  724.                 mb->mv_y    = 0;

  725.             }

  726. 

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

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

  729. 

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

  731.                 /* motion vector inheritance */

  732.                 if (mv_scale) {

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

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

  735.                 } else {

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

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

  738.                 }

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

  740.             }

  741. 

  742.             mb++;

  743.             if (ref_mb)

  744.                 ref_mb++;

  745.             mb_offset += band->mb_size;

  746.         } // for x

  747.         offs += row_offset;

  748.     } // for y

  749. 

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

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

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

  753.                                                  : ff_ivi_mc_4x4_no_delta;

  754. 

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

  756.             mv_x = mb->mv_x;

  757.             mv_y = mb->mv_y;

  758.             if (!band->is_halfpel) {

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

  760.             } else {

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

  762.                 mv_x >>= 1;

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

  764.             }

  765. 

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

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

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

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

  770.                              mv_x, mv_y, mc_type);

  771.                 if (ret < 0)

  772.                     return ret;

  773.             }

  774.         }

  775.     } else {

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

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

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

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

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

  781.             src += band->pitch;

  782.             dst += band->pitch;

  783.         }

  784.     }

  785. 

  786.     return 0;

  787. }

  788. 

  789. 

  790. #ifdef DEBUG

  791. static uint16_t ivi_calc_band_checksum(IVIBandDesc *band)

  792. {

  793.     int         x, y;

  794.     int16_t     *src, checksum;

  795. 

  796.     src = band->buf;

  797.     checksum = 0;

  798. 

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

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

  801.             checksum += src[x];

  802. 

  803.     return checksum;

  804. }

  805. #endif

  806. 

  807. /*

  808.  *  Convert and output the current plane.

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

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

  811.  *

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

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

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

  815.  */

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

  817. {

  818.     int             x, y;

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

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

  821. 

  822.     if (!src)

  823.         return;

  824. 

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

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

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

  828.         src += pitch;

  829.         dst += dst_pitch;

  830.     }

  831. }

  832. 

  833. /**

  834.  *  Decode an Indeo 4 or 5 band.

  835.  *

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

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

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

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

  840.  */

  841. static int decode_band(IVI45DecContext *ctx,

  842.                        IVIBandDesc *band, AVCodecContext *avctx)

  843. {

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

  845.     IVITile     *tile;

  846. 

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

  848.     if (!band->buf) {

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

  850.         return AVERROR_INVALIDDATA;

  851.     }

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

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

  854. 

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

  856.     if (result) {

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

  858.                result);

  859.         return result;

  860.     }

  861. 

  862.     if (band->is_empty) {

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

  864.         return AVERROR_INVALIDDATA;

  865.     }

  866. 

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

  868. 

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

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

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

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

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

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

  875.     }

  876. 

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

  878. 

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

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

  881. 

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

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

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

  885.             return AVERROR_INVALIDDATA;

  886.         }

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

  888.         if (tile->is_empty) {

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

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

  891.             if (result < 0)

  892.                 break;

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

  894.         } else {

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

  896.             if (!tile->data_size) {

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

  898.                 return AVERROR_INVALIDDATA;

  899.             }

  900. 

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

  902.             if (result < 0)

  903.                 break;

  904. 

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

  906.             if (result < 0) {

  907.                 av_log(avctx, AV_LOG_ERROR,

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

  909.                 break;

  910.             }

  911. 

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

  913.                 av_log(avctx, AV_LOG_ERROR,

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

  915.                 result = AVERROR_INVALIDDATA;

  916.                 break;

  917.             }

  918. 

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

  920.         }

  921.     }

  922. 

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

  924.      * reverse order */

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

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

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

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

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

  930.     }

  931. 

  932. #ifdef DEBUG

  933.     if (band->checksum_present) {

  934.         uint16_t chksum = ivi_calc_band_checksum(band);

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

  936.             av_log(avctx, AV_LOG_ERROR,

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

  938.                    "received: %"PRIx32", calculated: %"PRIx16"\n",

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

  940.         }

  941.     }

  942. #endif

  943. 

  944.     align_get_bits(&ctx->gb);

  945. 

  946.     return result;

  947. }

  948. 

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

  950.                         AVPacket *avpkt)

  951. {

  952.     IVI45DecContext *ctx = avctx->priv_data;

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

  954.     AVFrame       *frame = data;

  955.     int             buf_size = avpkt->size;

  956.     int             result, p, b;

  957. 

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

  959.     ctx->frame_data = buf;

  960.     ctx->frame_size = buf_size;

  961. 

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

  963.     if (result) {

  964.         av_log(avctx, AV_LOG_ERROR,

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

  966.         return result;

  967.     }

  968.     if (ctx->gop_invalid)

  969.         return AVERROR_INVALIDDATA;

  970. 

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

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

  973.         return AVERROR_PATCHWELCOME;

  974.     }

  975. 

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

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

  978.         return AVERROR_INVALIDDATA;

  979.     }

  980. 

  981.     ctx->switch_buffers(ctx);

  982. 

  983.     //{ START_TIMER;

  984. 

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

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

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

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

  989.                 if (result < 0) {

  990.                     av_log(avctx, AV_LOG_ERROR,

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

  992.                     return result;

  993.                 }

  994.             }

  995.         }

  996.     } else {

  997.         if (ctx->is_scalable)

  998.             return AVERROR_INVALIDDATA;

  999. 

  1000.         for (p = 0; p < 3; p++) {

  1001.             if (!ctx->planes[p].bands[0].buf)

  1002.                 return AVERROR_INVALIDDATA;

  1003.         }

  1004.     }

  1005. 

  1006.     //STOP_TIMER("decode_planes"); }

  1007. 

  1008.     /* If the bidirectional mode is enabled, next I and the following P

  1009.      * frame will be sent together. Unfortunately the approach below seems

  1010.      * to be the only way to handle the B-frames mode.

  1011.      * That's exactly the same Intel decoders do.

  1012.      */

  1013.     if (avctx->codec_id == AV_CODEC_ID_INDEO4 &&

  1014.         ctx->frame_type == 0/*FRAMETYPE_INTRA*/) {

  1015.         while (get_bits(&ctx->gb, 8)); // skip version string

  1016.         skip_bits_long(&ctx->gb, 64);  // skip padding, TODO: implement correct 8-bytes alignment

  1017.         if (get_bits_left(&ctx->gb) > 18 && show_bits(&ctx->gb, 18) == 0x3FFF8)

  1018.             av_log(avctx, AV_LOG_ERROR, "Buffer contains IP frames!\n");

  1019.     }

  1020. 

  1021.     result = ff_set_dimensions(avctx, ctx->planes[0].width, ctx->planes[0].height);

  1022.     if (result < 0)

  1023.         return result;

  1024. 

  1025.     if ((result = ff_get_buffer(avctx, frame, 0)) < 0) {

  1026.         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");

  1027.         return result;

  1028.     }

  1029. 

  1030.     if (ctx->is_scalable) {

  1031.         if (avctx->codec_id == AV_CODEC_ID_INDEO4)

  1032.             ff_ivi_recompose_haar(&ctx->planes[0], frame->data[0], frame->linesize[0]);

  1033.         else

  1034.             ff_ivi_recompose53   (&ctx->planes[0], frame->data[0], frame->linesize[0]);

  1035.     } else {

  1036.         ivi_output_plane(&ctx->planes[0], frame->data[0], frame->linesize[0]);

  1037.     }

  1038. 

  1039.     ivi_output_plane(&ctx->planes[2], frame->data[1], frame->linesize[1]);

  1040.     ivi_output_plane(&ctx->planes[1], frame->data[2], frame->linesize[2]);

  1041. 

  1042.     *got_frame = 1;

  1043. 

  1044.     return buf_size;

  1045. }

  1046. 

  1047. /**

  1048.  *  Close Indeo5 decoder and clean up its context.

  1049.  */

  1050. av_cold int ff_ivi_decode_close(AVCodecContext *avctx)

  1051. {

  1052.     IVI45DecContext *ctx = avctx->priv_data;

  1053. 

  1054.     ivi_free_buffers(&ctx->planes[0]);

  1055. 

  1056.     if (ctx->mb_vlc.cust_tab.table)

  1057.         ff_free_vlc(&ctx->mb_vlc.cust_tab);

  1058. 

  1059. #if IVI4_STREAM_ANALYSER

  1060.     if (avctx->codec_id == AV_CODEC_ID_INDEO4) {

  1061.     if (ctx->is_scalable)

  1062.         av_log(avctx, AV_LOG_ERROR, "This video uses scalability mode!\n");

  1063.     if (ctx->uses_tiling)

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

  1065.     if (ctx->has_b_frames)

  1066.         av_log(avctx, AV_LOG_ERROR, "This video contains B-frames!\n");

  1067.     if (ctx->has_transp)

  1068.         av_log(avctx, AV_LOG_ERROR, "Transparency mode is enabled!\n");

  1069.     if (ctx->uses_haar)

  1070.         av_log(avctx, AV_LOG_ERROR, "This video uses Haar transform!\n");

  1071.     if (ctx->uses_fullpel)

  1072.         av_log(avctx, AV_LOG_ERROR, "This video uses fullpel motion vectors!\n");

  1073.     }

  1074. #endif

  1075. 

  1076.     return 0;

  1077. }

  1078. 

  1079. 

  1080. /**

  1081.  *  Scan patterns shared between indeo4 and indeo5

  1082.  */

  1083. const uint8_t ff_ivi_vertical_scan_8x8[64] = {

  1084.     0,  8, 16, 24, 32, 40, 48, 56,

  1085.     1,  9, 17, 25, 33, 41, 49, 57,

  1086.     2, 10, 18, 26, 34, 42, 50, 58,

  1087.     3, 11, 19, 27, 35, 43, 51, 59,

  1088.     4, 12, 20, 28, 36, 44, 52, 60,

  1089.     5, 13, 21, 29, 37, 45, 53, 61,

  1090.     6, 14, 22, 30, 38, 46, 54, 62,

  1091.     7, 15, 23, 31, 39, 47, 55, 63

  1092. };

  1093. 

  1094. const uint8_t ff_ivi_horizontal_scan_8x8[64] = {

  1095.      0,  1,  2,  3,  4,  5,  6,  7,

  1096.      8,  9, 10, 11, 12, 13, 14, 15,

  1097.     16, 17, 18, 19, 20, 21, 22, 23,

  1098.     24, 25, 26, 27, 28, 29, 30, 31,

  1099.     32, 33, 34, 35, 36, 37, 38, 39,

  1100.     40, 41, 42, 43, 44, 45, 46, 47,

  1101.     48, 49, 50, 51, 52, 53, 54, 55,

  1102.     56, 57, 58, 59, 60, 61, 62, 63

  1103. };

  1104. 

  1105. const uint8_t ff_ivi_direct_scan_4x4[16] = {

  1106.     0, 1, 4, 8, 5, 2, 3, 6, 9, 12, 13, 10, 7, 11, 14, 15

  1107. };

  1108. 

  1109. 

  1110. /**

  1111.  *  Run-value (RLE) tables.

  1112.  */

  1113. const RVMapDesc ff_ivi_rvmap_tabs[9] = {

  1114. {   /* MapTab0 */

  1115.     5, /* eob_sym */

  1116.     2, /* esc_sym */

  1117.     /* run table */

  1118.     {1,  1,  0,  1,  1,  0,  1,  1,  2,  2,  1,  1,  1,  1,  3,  3,

  1119.      1,  1,  2,  2,  1,  1,  4,  4,  1,  1,  1,  1,  2,  2,  5,  5,

  1120.      1,  1,  3,  3,  1,  1,  6,  6,  1,  2,  1,  2,  7,  7,  1,  1,

  1121.      8,  8,  1,  1,  4,  2,  1,  4,  2,  1,  3,  3,  1,  1,  1,  9,

  1122.      9,  1,  2,  1,  2,  1,  5,  5,  1,  1, 10, 10,  1,  1,  3,  3,

  1123.      2,  2,  1,  1, 11, 11,  6,  4,  4,  1,  6,  1,  2,  1,  2, 12,

  1124.      8,  1, 12,  7,  8,  7,  1, 16,  1, 16,  1,  3,  3, 13,  1, 13,

  1125.      2,  2,  1, 15,  1,  5, 14, 15,  1,  5, 14,  1, 17,  8, 17,  8,

  1126.      1,  4,  4,  2,  2,  1, 25, 25, 24, 24,  1,  3,  1,  3,  1,  8,

  1127.      6,  7,  6,  1, 18,  8, 18,  1,  7, 23,  2,  2, 23,  1,  1, 21,

  1128.     22,  9,  9, 22, 19,  1, 21,  5, 19,  5,  1, 33, 20, 33, 20,  8,

  1129.      4,  4,  1, 32,  2,  2,  8,  3, 32, 26,  3,  1,  7,  7, 26,  6,

  1130.      1,  6,  1,  1, 16,  1, 10,  1, 10,  2, 16, 29, 28,  2, 29, 28,

  1131.      1, 27,  5,  8,  5, 27,  1,  8,  3,  7,  3, 31, 41, 31,  1, 41,

  1132.      6,  1,  6,  7,  4,  4,  1,  1,  2,  1,  2, 11, 34, 30, 11,  1,

  1133.     30, 15, 15, 34, 36, 40, 36, 40, 35, 35, 37, 37, 39, 39, 38, 38},

  1134. 

  1135.     /* value table */

  1136.     { 1,  -1,   0,   2,  -2,   0,   3,  -3,   1,  -1,   4,  -4,   5,  -5,   1,  -1,

  1137.       6,  -6,   2,  -2,   7,  -7,   1,  -1,   8,  -8,   9,  -9,   3,  -3,   1,  -1,

  1138.      10, -10,   2,  -2,  11, -11,   1,  -1,  12,   4, -12,  -4,   1,  -1,  13, -13,

  1139.       1,  -1,  14, -14,   2,   5,  15,  -2,  -5, -15,  -3,   3,  16, -16,  17,   1,

  1140.      -1, -17,   6,  18,  -6, -18,   2,  -2,  19, -19,   1,  -1,  20, -20,   4,  -4,

  1141.       7,  -7,  21, -21,   1,  -1,   2,   3,  -3,  22,  -2, -22,   8,  23,  -8,   1,

  1142.       2, -23,  -1,   2,  -2,  -2,  24,   1, -24,  -1,  25,   5,  -5,   1, -25,  -1,

  1143.       9,  -9,  26,   1, -26,   3,   1,  -1,  27,  -3,  -1, -27,   1,   3,  -1,  -3,

  1144.      28,  -4,   4,  10, -10, -28,   1,  -1,   1,  -1,  29,   6, -29,  -6,  30,  -4,

  1145.       3,   3,  -3, -30,   1,   4,  -1,  31,  -3,   1,  11, -11,  -1, -31,  32,  -1,

  1146.      -1,   2,  -2,   1,   1, -32,   1,   4,  -1,  -4,  33,  -1,   1,   1,  -1,   5,

  1147.       5,  -5, -33,  -1, -12,  12,  -5,  -7,   1,   1,   7,  34,   4,  -4,  -1,   4,

  1148.     -34,  -4,  35,  36,  -2, -35,  -2, -36,   2,  13,   2,  -1,   1, -13,   1,  -1,

  1149.      37,   1,  -5,   6,   5,  -1,  38,  -6,  -8,   5,   8,  -1,   1,   1, -37,  -1,

  1150.       5,  39,  -5,  -5,   6,  -6, -38, -39, -14,  40,  14,   2,   1,   1,  -2, -40,

  1151.      -1,  -2,   2,  -1,  -1,  -1,   1,   1,   1,  -1,   1,  -1,   1,  -1,   1,  -1}

  1152. },{

  1153.     /* MapTab1 */

  1154.     0,  /* eob_sym */

  1155.     38, /* esc_sym */

  1156.     /* run table */

  1157.     {0,  1,  1,  2,  2,  3,  3,  4,  4,  5,  5,  6,  8,  6,  8,  7,

  1158.      7,  9,  9, 10, 10, 11, 11,  1, 12,  1, 12, 13, 13, 16, 14, 16,

  1159.     14, 15, 15, 17, 17, 18,  0, 18, 19, 20, 21, 19, 22, 21, 20, 22,

  1160.     25, 24,  2, 25, 24, 23, 23,  2, 26, 28, 26, 28, 29, 27, 29, 27,

  1161.     33, 33,  1, 32,  1,  3, 32, 30, 36,  3, 36, 30, 31, 31, 35, 34,

  1162.     37, 41, 34, 35, 37,  4, 41,  4, 49,  8,  8, 49, 40, 38,  5, 38,

  1163.     40, 39,  5, 39, 42, 43, 42,  7, 57,  6, 43, 44,  6, 50,  7, 44,

  1164.     57, 48, 50, 48, 45, 45, 46, 47, 51, 46, 47, 58,  1, 51, 58,  1,

  1165.     52, 59, 53,  9, 52, 55, 55, 59, 53, 56, 54, 56, 54,  9, 64, 64,

  1166.     60, 63, 60, 63, 61, 62, 61, 62,  2, 10,  2, 10, 11,  1, 11, 13,

  1167.     12,  1, 12, 13, 16, 16,  8,  8, 14,  3,  3, 15, 14, 15,  4,  4,

  1168.      1, 17, 17,  5,  1,  7,  7,  5,  6,  1,  2,  2,  6, 22,  1, 25,

  1169.     21, 22,  8, 24,  1, 21, 25, 24,  8, 18, 18, 23,  9, 20, 23, 33,

  1170.     29, 33, 20,  1, 19,  1, 29, 36,  9, 36, 19, 41, 28, 57, 32,  3,

  1171.     28,  3,  1, 27, 49, 49,  1, 32, 26, 26,  2,  4,  4,  7, 57, 41,

  1172.      2,  7, 10,  5, 37, 16, 10, 27,  8,  8, 13, 16, 37, 13,  1,  5},

  1173. 

  1174.     /* value table */

  1175.     {0,   1,  -1,   1,  -1,   1,  -1,   1,  -1,   1,  -1,   1,   1,  -1,  -1,   1,

  1176.     -1,   1,  -1,   1,  -1,   1,  -1,   2,   1,  -2,  -1,   1,  -1,   1,   1,  -1,

  1177.     -1,   1,  -1,   1,  -1,   1,   0,  -1,   1,   1,   1,  -1,   1,  -1,  -1,  -1,

  1178.      1,   1,   2,  -1,  -1,   1,  -1,  -2,   1,   1,  -1,  -1,   1,   1,  -1,  -1,

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

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

  1181.     -1,   1,  -2,  -1,   1,   1,  -1,   2,   1,   2,  -1,   1,  -2,  -1,  -2,  -1,

  1182.     -1,   1,   1,  -1,   1,  -1,   1,   1,   1,  -1,  -1,   1,   4,  -1,  -1,  -4,

  1183.      1,   1,   1,   2,  -1,  -1,   1,  -1,  -1,   1,  -1,  -1,   1,  -2,   1,  -1,

  1184.      1,   1,  -1,  -1,   1,   1,  -1,  -1,   3,   2,  -3,  -2,   2,   5,  -2,   2,

  1185.      2,  -5,  -2,  -2,  -2,   2,  -3,   3,   2,   3,  -3,   2,  -2,  -2,   3,  -3,

  1186.      6,   2,  -2,   3,  -6,   3,  -3,  -3,   3,   7,  -4,   4,  -3,   2,  -7,   2,

  1187.      2,  -2,  -4,   2,   8,  -2,  -2,  -2,   4,   2,  -2,   2,   3,   2,  -2,  -2,

  1188.      2,   2,  -2,  -8,  -2,   9,  -2,   2,  -3,  -2,   2,  -2,   2,   2,   2,   4,

  1189.     -2,  -4,  10,   2,   2,  -2,  -9,  -2,   2,  -2,   5,   4,  -4,   4,  -2,   2,

  1190.     -5,  -4,  -3,   4,   2,  -3,   3,  -2,  -5,   5,   3,   3,  -2,  -3, -10,  -4}

  1191. },{

  1192.     /* MapTab2 */

  1193.     2,  /* eob_sym */

  1194.     11, /* esc_sym */

  1195.     /* run table */

  1196.     {1,  1,  0,  2,  2,  1,  1,  3,  3,  4,  4,  0,  1,  1,  5,  5,

  1197.      2,  2,  6,  6,  7,  7,  1,  8,  1,  8,  3,  3,  9,  9,  1,  2,

  1198.      2,  1,  4, 10,  4, 10, 11, 11,  1,  5, 12, 12,  1,  5, 13, 13,

  1199.      3,  3,  6,  6,  2,  2, 14, 14, 16, 16, 15,  7, 15,  8,  8,  7,

  1200.      1,  1, 17, 17,  4,  4,  1,  1, 18, 18,  2,  2,  5,  5, 25,  3,

  1201.      9,  3, 25,  9, 19, 24, 19, 24,  1, 21, 20,  1, 21, 22, 20, 22,

  1202.     23, 23,  8,  6, 33,  6,  8, 33,  7,  7, 26, 26,  1, 32,  1, 32,

  1203.     28,  4, 28, 10, 29, 27, 27, 10, 41,  4, 29,  2,  2, 41, 36, 31,

  1204.     49, 31, 34, 30, 34, 36, 30, 35,  1, 49, 11,  5, 35, 11,  1,  3,

  1205.      3,  5, 37, 37,  8, 40,  8, 40, 12, 12, 42, 42,  1, 38, 16, 57,

  1206.      1,  6, 16, 39, 38,  6,  7,  7, 13, 13, 39, 43,  2, 43, 57,  2,

  1207.     50,  9, 44,  9, 50,  4, 15, 48, 44,  4,  1, 15, 48, 14, 14,  1,

  1208.     45, 45,  8,  3,  5,  8, 51, 47,  3, 46, 46, 47,  5, 51,  1, 17,

  1209.     17, 58,  1, 58,  2, 52, 52,  2, 53,  7, 59,  6,  6, 56, 53, 55,

  1210.      7, 55,  1, 54, 59, 56, 54, 10,  1, 10,  4, 60,  1, 60,  8,  4,

  1211.      8, 64, 64, 61,  1, 63,  3, 63, 62, 61,  5, 11,  5,  3, 11, 62},

  1212. 

  1213.     /* value table */

  1214.     { 1,  -1,   0,   1,  -1,   2,  -2,   1,  -1,   1,  -1,   0,   3,  -3,   1,  -1,

  1215.       2,  -2,   1,  -1,   1,  -1,   4,   1,  -4,  -1,   2,  -2,   1,  -1,   5,   3,

  1216.      -3,  -5,   2,   1,  -2,  -1,   1,  -1,   6,   2,   1,  -1,  -6,  -2,   1,  -1,

  1217.       3,  -3,   2,  -2,   4,  -4,   1,  -1,   1,  -1,   1,   2,  -1,   2,  -2,  -2,

  1218.       7,  -7,   1,  -1,   3,  -3,   8,  -8,   1,  -1,   5,  -5,   3,  -3,   1,   4,

  1219.       2,  -4,  -1,  -2,   1,   1,  -1,  -1,   9,   1,   1,  -9,  -1,   1,  -1,  -1,

  1220.       1,  -1,   3,  -3,   1,   3,  -3,  -1,   3,  -3,   1,  -1,  10,   1, -10,  -1,

  1221.       1,   4,  -1,   2,   1,  -1,   1,  -2,   1,  -4,  -1,   6,  -6,  -1,   1,   1,

  1222.       1,  -1,   1,   1,  -1,  -1,  -1,   1,  11,  -1,  -2,   4,  -1,   2, -11,   5,

  1223.      -5,  -4,  -1,   1,   4,   1,  -4,  -1,  -2,   2,   1,  -1,  12,   1,  -2,   1,

  1224.     -12,   4,   2,   1,  -1,  -4,   4,  -4,   2,  -2,  -1,   1,   7,  -1,  -1,  -7,

  1225.      -1,  -3,   1,   3,   1,   5,   2,   1,  -1,  -5,  13,  -2,  -1,   2,  -2, -13,

  1226.       1,  -1,   5,   6,   5,  -5,   1,   1,  -6,   1,  -1,  -1,  -5,  -1,  14,   2,

  1227.      -2,   1, -14,  -1,   8,   1,  -1,  -8,   1,   5,   1,   5,  -5,   1,  -1,   1,

  1228.      -5,  -1,  15,   1,  -1,  -1,  -1,   3, -15,  -3,   6,   1,  16,  -1,   6,  -6,

  1229.      -6,   1,  -1,   1, -16,   1,   7,  -1,   1,  -1,  -6,  -3,   6,  -7,   3,  -1}

  1230. },{

  1231.     /* MapTab3 */

  1232.     0,  /* eob_sym */

  1233.     35, /* esc_sym */

  1234.     /* run table */

  1235.     {0,  1,  1,  2,  2,  3,  3,  4,  4,  1,  1,  5,  5,  6,  6,  7,

  1236.      7,  8,  8,  9,  9,  2,  2, 10, 10,  1,  1, 11, 11, 12, 12,  3,

  1237.      3, 13, 13,  0, 14, 14, 16, 15, 16, 15,  4,  4, 17,  1, 17,  1,

  1238.      5,  5, 18, 18,  2,  2,  6,  6,  8, 19,  7,  8,  7, 19, 20, 20,

  1239.     21, 21, 22, 24, 22, 24, 23, 23,  1,  1, 25, 25,  3,  3, 26, 26,

  1240.      9,  9, 27, 27, 28, 28, 33, 29,  4, 33, 29,  1,  4,  1, 32, 32,

  1241.      2,  2, 31, 10, 30, 10, 30, 31, 34, 34,  5,  5, 36, 36, 35, 41,

  1242.     35, 11, 41, 11, 37,  1,  8,  8, 37,  6,  1,  6, 40,  7,  7, 40,

  1243.     12, 38, 12, 39, 39, 38, 49, 13, 49, 13,  3, 42,  3, 42, 16, 16,

  1244.     43, 43, 14, 14,  1,  1, 44, 15, 44, 15,  2,  2, 57, 48, 50, 48,

  1245.     57, 50,  4, 45, 45,  4, 46, 47, 47, 46,  1, 51,  1, 17, 17, 51,

  1246.      8,  9,  9,  5, 58,  8, 58,  5, 52, 52, 55, 56, 53, 56, 55, 59,

  1247.     59, 53, 54,  1,  6, 54,  7,  7,  6,  1,  2,  3,  2,  3, 64, 60,

  1248.     60, 10, 10, 64, 61, 62, 61, 63,  1, 63, 62,  1, 18, 24, 18,  4,

  1249.     25,  4,  8, 21, 21,  1, 24, 22, 25, 22,  8, 11, 19, 11, 23,  1,

  1250.     20, 23, 19, 20,  5, 12,  5,  1, 16,  2, 12, 13,  2, 13,  1, 16},

  1251. 

  1252.     /* value table */

  1253.     { 0,   1,  -1,   1,  -1,   1,  -1,   1,  -1,   2,  -2,   1,  -1,   1,  -1,   1,

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

  1255.      -2,   1,  -1,   0,   1,  -1,   1,   1,  -1,  -1,   2,  -2,   1,   4,  -1,  -4,

  1256.       2,  -2,   1,  -1,  -3,   3,   2,  -2,   2,   1,   2,  -2,  -2,  -1,   1,  -1,

  1257.       1,  -1,   1,   1,  -1,  -1,   1,  -1,   5,  -5,   1,  -1,   3,  -3,   1,  -1,

  1258.       2,  -2,   1,  -1,   1,  -1,   1,   1,   3,  -1,  -1,   6,  -3,  -6,  -1,   1,

  1259.       4,  -4,   1,   2,   1,  -2,  -1,  -1,   1,  -1,   3,  -3,   1,  -1,   1,   1,

  1260.      -1,   2,  -1,  -2,   1,   7,  -3,   3,  -1,   3,  -7,  -3,   1,  -3,   3,  -1,

  1261.       2,   1,  -2,   1,  -1,  -1,   1,   2,  -1,  -2,  -4,  -1,   4,   1,   2,  -2,

  1262.       1,  -1,  -2,   2,   8,  -8,  -1,   2,   1,  -2,  -5,   5,   1,  -1,  -1,   1,

  1263.      -1,   1,   4,  -1,   1,  -4,  -1,  -1,   1,   1,   9,   1,  -9,   2,  -2,  -1,

  1264.      -4,   3,  -3,  -4,  -1,   4,   1,   4,   1,  -1,   1,  -1,   1,   1,  -1,   1,

  1265.      -1,  -1,  -1,  10,   4,   1,   4,  -4,  -4, -10,   6,   5,  -6,  -5,   1,  -1,

  1266.       1,   3,  -3,  -1,   1,  -1,  -1,  -1,  11,   1,   1, -11,  -2,  -2,   2,   5,

  1267.      -2,  -5,  -5,   2,  -2,  12,   2,  -2,   2,   2,   5,  -3,  -2,   3,  -2, -12,

  1268.      -2,   2,   2,   2,  -5,   3,   5,  13,  -3,   7,  -3,  -3,  -7,   3, -13,   3}

  1269. },{

  1270.     /* MapTab4 */

  1271.     0,  /* eob_sym */

  1272.     34, /* esc_sym */

  1273.     /* run table */

  1274.     {0,  1,  1,  1,  2,  2,  1,  3,  3,  1,  1,  1,  4,  4,  1,  5,

  1275.      2,  1,  5,  2,  1,  1,  6,  6,  1,  1,  1,  1,  1,  7,  3,  1,

  1276.      2,  3,  0,  1,  2,  7,  1,  1,  1,  8,  1,  1,  8,  1,  1,  1,

  1277.      9,  1,  9,  1,  2,  1,  1,  2,  1,  1, 10,  4,  1, 10,  1,  4,

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

  1279.      2,  5,  1, 11,  1, 11,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,

  1280.      2,  1,  6,  1,  6,  1,  1,  2,  1,  1,  1,  1,  1,  1,  1, 12,

  1281.      3,  1, 12,  1,  1,  1,  2,  1,  1,  3,  1,  1,  1,  1,  1,  1,

  1282.      4,  1,  1,  1,  2,  1,  1,  4,  1,  1,  1,  1,  1,  1,  2,  1,

  1283.      1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  3,  1,  2,  1,  1,  5,

  1284.      1,  1,  1,  1,  1,  7,  1,  7,  1,  1,  2,  3,  1,  1,  1,  1,

  1285.      5,  1,  1,  1,  1,  1,  1,  2, 13,  1,  1,  1,  1,  1,  1,  1,

  1286.      1,  1,  1,  1,  1,  1,  1,  1, 13,  2,  1,  1,  4,  1,  1,  1,

  1287.      3,  1,  6,  1,  1,  1, 14,  1,  1,  1,  1,  1, 14,  6,  1,  1,

  1288.      1,  1, 15,  2,  4,  1,  2,  3, 15,  1,  1,  1,  8,  1,  1,  8,

  1289.      1,  1,  1,  1,  1,  1,  1,  1,  2,  1,  1,  1,  1,  1,  1,  1},

  1290. 

  1291.     /* value table */

  1292.     { 0,   1,  -1,   2,   1,  -1,  -2,   1,  -1,   3,  -3,   4,   1,  -1,  -4,   1,

  1293.       2,   5,  -1,  -2,  -5,   6,   1,  -1,  -6,   7,  -7,   8,  -8,   1,   2,   9,

  1294.       3,  -2,   0,  -9,  -3,  -1,  10, -10,  11,   1, -11,  12,  -1, -12,  13, -13,

  1295.       1,  14,  -1, -14,   4,  15, -15,  -4,  16, -16,   1,   2,  17,  -1, -17,  -2,

  1296.      18, -18,  19, -19,  20,   3, -20,  21, -21,  -3,   5,  22,   2, -22, -23,  23,

  1297.      -5,  -2,  24,   1, -24,  -1,  25, -25,  26, -26, -27,  27,  28,  29, -28, -29,

  1298.       6,  30,   2, -31,  -2, -30,  31,  -6, -32,  32,  33, -33,  34, -35, -34,   1,

  1299.       4, -36,  -1,  35,  37,  36,   7, -37,  38,  -4, -38,  39,  41,  40, -40, -39,

  1300.       3,  42, -43, -41,  -7, -42,  43,  -3,  44, -44,  45, -45,  46,  47,   8, -47,

  1301.     -48, -46,  50, -50,  48,  49,  51, -49,  52, -52,   5, -51,  -8, -53,  53,   3,

  1302.     -56,  56,  55,  54, -54,   2,  60,  -2, -55,  58,   9,  -5,  59,  57, -57, -63,

  1303.      -3, -58, -60, -61,  61, -59, -62,  -9,   1,  64,  62,  69, -64,  63,  65, -67,

  1304.     -68,  66, -65,  68, -66, -69,  67, -70,  -1,  10,  71, -71,   4,  73,  72,  70,

  1305.       6, -76,  -3,  74, -78, -74,   1,  78,  80, -72, -75,  76,  -1,   3, -73,  79,

  1306.      75,  77,   1,  11,  -4, -79, -10,  -6,  -1, -77, -83, -80,   2,  81, -84,  -2,

  1307.      83, -81,  82, -82,  84, -87, -86,  85, -11, -85,  86, -89,  87, -88,  88,  89}

  1308. },{

  1309.     /* MapTab5 */

  1310.     2,  /* eob_sym */

  1311.     33, /* esc_sym */

  1312.     /* run table */

  1313.     {1,  1,  0,  2,  1,  2,  1,  3,  3,  1,  1,  4,  4,  2,  2,  1,

  1314.      1,  5,  5,  6,  1,  6,  1,  7,  7,  3,  3,  2,  8,  2,  8,  1,

  1315.      1,  0,  9,  9,  1,  1, 10,  4, 10,  4, 11, 11,  2,  1,  2,  1,

  1316.     12, 12,  3,  3,  1,  1, 13,  5,  5, 13, 14,  1,  1, 14,  2,  2,

  1317.      6,  6, 15,  1,  1, 15, 16,  4,  7, 16,  4,  7,  1,  1,  3,  3,

  1318.      8,  8,  2,  2,  1,  1, 17, 17,  1,  1, 18, 18,  5,  5,  2,  2,

  1319.      1,  1,  9, 19,  9, 19, 20,  3,  3, 20,  1, 10, 21,  1, 10,  4,

  1320.      4, 21, 22,  6,  6, 22,  1,  1, 23, 24,  2,  2, 23, 24, 11,  1,

  1321.      1, 11,  7, 25,  7,  1,  1, 25,  8,  8,  3, 26,  3,  1, 12,  2,

  1322.      2, 26,  1, 12,  5,  5, 27,  4,  1,  4,  1, 27, 28,  1, 28, 13,

  1323.      1, 13,  2, 29,  2,  1, 32,  6,  1, 30, 14, 29, 14,  6,  3, 31,

  1324.      3,  1, 30,  1, 32, 31, 33,  9, 33,  1,  1,  7,  9,  7,  2,  2,

  1325.      1,  1,  4, 36, 34,  4,  5, 10, 10,  5, 34,  1,  1, 35,  8,  8,

  1326.     36,  3, 35,  1, 15,  3,  2,  1, 16, 15, 16,  2, 37,  1, 37,  1,

  1327.      1,  1,  6,  6, 38,  1, 38, 11,  1, 39, 39, 40, 11,  2, 41,  4,

  1328.     40,  1,  2,  4,  1,  1,  1, 41,  3,  1,  3,  1,  5,  7,  5,  7},

  1329. 

  1330.     /* value table */

  1331.     { 1,  -1,   0,   1,   2,  -1,  -2,   1,  -1,   3,  -3,   1,  -1,   2,  -2,   4,

  1332.      -4,   1,  -1,   1,   5,  -1,  -5,   1,  -1,   2,  -2,   3,   1,  -3,  -1,   6,

  1333.      -6,   0,   1,  -1,   7,  -7,   1,   2,  -1,  -2,   1,  -1,   4,   8,  -4,  -8,

  1334.       1,  -1,   3,  -3,   9,  -9,   1,   2,  -2,  -1,   1,  10, -10,  -1,   5,  -5,

  1335.       2,  -2,   1,  11, -11,  -1,   1,   3,   2,  -1,  -3,  -2,  12, -12,   4,  -4,

  1336.       2,  -2,  -6,   6,  13, -13,   1,  -1,  14, -14,   1,  -1,   3,  -3,   7,  -7,

  1337.      15, -15,   2,   1,  -2,  -1,   1,   5,  -5,  -1, -16,   2,   1,  16,  -2,   4,

  1338.      -4,  -1,   1,   3,  -3,  -1,  17, -17,   1,   1,  -8,   8,  -1,  -1,   2,  18,

  1339.     -18,  -2,   3,   1,  -3,  19, -19,  -1,   3,  -3,   6,   1,  -6,  20,   2,   9,

  1340.      -9,  -1, -20,  -2,   4,  -4,   1,  -5,  21,   5, -21,  -1,   1, -22,  -1,   2,

  1341.      22,  -2,  10,   1, -10,  23,   1,   4, -23,   1,   2,  -1,  -2,  -4,  -7,   1,

  1342.       7, -24,  -1,  24,  -1,  -1,   1,   3,  -1, -25,  25,   4,  -3,  -4,  11, -11,

  1343.      26, -26,   6,   1,   1,  -6,  -5,  -3,   3,   5,  -1, -27,  27,   1,   4,  -4,

  1344.      -1,  -8,  -1,  28,   2,   8, -12, -28,  -2,  -2,   2,  12,  -1,  29,   1, -29,

  1345.      30, -30,   5,  -5,   1, -31,  -1,   3,  31,  -1,   1,   1,  -3, -13,   1,  -7,

  1346.      -1, -32,  13,   7,  32,  33, -33,  -1,  -9, -34,   9,  34,  -6,   5,   6,  -5}

  1347. },{

  1348.     /* MapTab6 */

  1349.     2,  /* eob_sym */

  1350.     13, /* esc_sym */

  1351.     /* run table */

  1352.     {1,  1,  0,  1,  1,  2,  2,  1,  1,  3,  3,  1,  1,  0,  2,  2,

  1353.      4,  1,  4,  1,  1,  1,  5,  5,  1,  1,  6,  6,  2,  2,  1,  1,

  1354.      3,  3,  7,  7,  1,  1,  8,  8,  1,  1,  2,  2,  1,  9,  1,  9,

  1355.      4,  4, 10,  1,  1, 10,  1,  1, 11, 11,  3,  3,  1,  2,  1,  2,

  1356.      1,  1, 12, 12,  5,  5,  1,  1, 13,  1,  1, 13,  2,  2,  1,  1,

  1357.      6,  6,  1,  1,  4, 14,  4, 14,  3,  1,  3,  1,  1,  1, 15,  7,

  1358.     15,  2,  2,  7,  1,  1,  1,  8,  1,  8, 16, 16,  1,  1,  1,  1,

  1359.      2,  1,  1,  2,  1,  1,  3,  5,  5,  3,  4,  1,  1,  4,  1,  1,

  1360.     17, 17,  9,  1,  1,  9,  2,  2,  1,  1, 10, 10,  1,  6,  1,  1,

  1361.      6, 18,  1,  1, 18,  1,  1,  1,  2,  2,  3,  1,  3,  1,  1,  1,

  1362.      4,  1, 19,  1, 19,  7,  1,  1, 20,  1,  4, 20,  1,  7, 11,  2,

  1363.      1, 11, 21,  2,  8,  5,  1,  8,  1,  5, 21,  1,  1,  1, 22,  1,

  1364.      1, 22,  1,  1,  3,  3,  1, 23,  2, 12, 24,  1,  1,  2,  1,  1,

  1365.     12, 23,  1,  1, 24,  1,  1,  1,  4,  1,  1,  1,  2,  1,  6,  6,

  1366.      4,  2,  1,  1,  1,  1,  1,  1,  1, 14, 13,  3,  1, 25,  9, 25,

  1367.     14,  1,  9,  3, 13,  1,  1,  1,  1,  1, 10,  1,  1,  2, 10,  2},

  1368. 

  1369.     /* value table */

  1370.     {-20,  -1,   0,   2,  -2,   1,  -1,   3,  -3,   1,  -1,   4,  -4,   0,   2,  -2,

  1371.        1,   5,  -1,  -5,   6,  -6,   1,  -1,   7,  -7,   1,  -1,   3,  -3,   8,  -8,

  1372.        2,  -2,   1,  -1,   9,  -9,   1,  -1,  10, -10,   4,  -4,  11,   1, -11,  -1,

  1373.        2,  -2,   1,  12, -12,  -1,  13, -13,   1,  -1,   3,  -3,  14,   5, -14,  -5,

  1374.      -15,  15,  -1,   1,   2,  -2,  16, -16,   1,  17, -17,  -1,   6,  -6,  18, -18,

  1375.        2,  -2, -19,  19,  -3,   1,   3,  -1,   4,  20,  -4,   1, -21,  21,   1,   2,

  1376.       -1,  -7,   7,  -2,  22, -22,  23,   2, -23,  -2,   1,  -1, -24,  24, -25,  25,

  1377.       -8, -26,  26,   8, -27,  27,   5,   3,  -3,  -5,  -4,  28, -28,   4,  29, -29,

  1378.        1,  -1,  -2, -30,  30,   2,   9,  -9, -31,  31,   2,  -2, -32,   3,  32, -33,

  1379.       -3,   1,  33, -34,  -1,  34, -35,  35, -10,  10,  -6,  36,   6, -36,  37, -37,

  1380.       -5,  38,   1, -38,  -1,   3,  39, -39,  -1,  40,   5,   1, -40,  -3,   2, -11,

  1381.      -41,  -2,   1,  11,  -3,  -4,  41,   3,  42,   4,  -1, -43, -42,  43,   1, -44,

  1382.       45,  -1,  44, -45,  -7,   7, -46,   1, -12,   2,   1, -47,  46,  12,  47,  48,

  1383.       -2,  -1, -48,  49,  -1, -50, -49,  50,  -6, -51,  51,  52, -13,  53,  -4,   4,

  1384.        6,  13, -53, -52, -54,  55,  54, -55, -56,  -2,   2,  -8,  56,   1,  -3,  -1,

  1385.        2,  58,   3,   8,  -2,  57, -58, -60, -59, -57,  -3,  60,  59, -14,   3,  14}

  1386. },{

  1387.     /* MapTab7 */

  1388.     2,  /* eob_sym */

  1389.     38, /* esc_sym */

  1390.     /* run table */

  1391.     {1,  1,  0,  2,  2,  1,  1,  3,  3,  4,  4,  5,  5,  1,  1,  6,

  1392.      6,  2,  2,  7,  7,  8,  8,  1,  1,  3,  3,  9,  9, 10, 10,  1,

  1393.      1,  2,  2,  4,  4, 11,  0, 11, 12, 12, 13, 13,  1,  1,  5,  5,

  1394.     14, 14, 15, 16, 15, 16,  3,  3,  1,  6,  1,  6,  2,  2,  7,  7,

  1395.      8,  8, 17, 17,  1,  1,  4,  4, 18, 18,  2,  2,  1, 19,  1, 20,

  1396.     19, 20, 21, 21,  3,  3, 22, 22,  5,  5, 24,  1,  1, 23,  9, 23,

  1397.     24,  9,  2,  2, 10,  1,  1, 10,  6,  6, 25,  4,  4, 25,  7,  7,

  1398.     26,  8,  1,  8,  3,  1, 26,  3, 11, 11, 27, 27,  2, 28,  1,  2,

  1399.     28,  1, 12, 12,  5,  5, 29, 13, 13, 29, 32,  1,  1, 33, 31, 30,

  1400.     32,  4, 30, 33,  4, 31,  3, 14,  1,  1,  3, 34, 34,  2,  2, 14,

  1401.      6,  6, 35, 36, 35, 36,  1, 15,  1, 16, 16, 15,  7,  9,  7,  9,

  1402.     37,  8,  8, 37,  1,  1, 39,  2, 38, 39,  2, 40,  5, 38, 40,  5,

  1403.      3,  3,  4,  4, 10, 10,  1,  1,  1,  1, 41,  2, 41,  2,  6,  6,

  1404.      1,  1, 11, 42, 11, 43,  3, 42,  3, 17,  4, 43,  1, 17,  7,  1,

  1405.      8, 44,  4,  7, 44,  5,  8,  2,  5,  1,  2, 48, 45,  1, 12, 45,

  1406.     12, 48, 13, 13,  1,  9,  9, 46,  1, 46, 47, 47, 49, 18, 18, 49},

  1407. 

  1408.     /* value table */

  1409.     { 1,  -1,   0,   1,  -1,   2,  -2,   1,  -1,   1,  -1,   1,  -1,   3,  -3,   1,

  1410.      -1,  -2,   2,   1,  -1,   1,  -1,   4,  -4,  -2,   2,   1,  -1,   1,  -1,   5,

  1411.      -5,  -3,   3,   2,  -2,   1,   0,  -1,   1,  -1,   1,  -1,   6,  -6,   2,  -2,

  1412.       1,  -1,   1,   1,  -1,  -1,  -3,   3,   7,   2,  -7,  -2,  -4,   4,   2,  -2,

  1413.       2,  -2,   1,  -1,   8,  -8,   3,  -3,   1,  -1,  -5,   5,   9,   1,  -9,   1,

  1414.      -1,  -1,   1,  -1,  -4,   4,   1,  -1,   3,  -3,   1, -10,  10,   1,   2,  -1,

  1415.      -1,  -2,   6,  -6,   2,  11, -11,  -2,   3,  -3,   1,  -4,   4,  -1,   3,  -3,

  1416.       1,   3,  12,  -3,  -5, -12,  -1,   5,   2,  -2,   1,  -1,  -7,   1,  13,   7,

  1417.      -1, -13,   2,  -2,   4,  -4,   1,   2,  -2,  -1,   1,  14, -14,   1,   1,   1,

  1418.      -1,  -5,  -1,  -1,   5,  -1,  -6,   2, -15,  15,   6,   1,  -1,  -8,   8,  -2,

  1419.      -4,   4,   1,   1,  -1,  -1,  16,   2, -16,  -2,   2,  -2,   4,   3,  -4,  -3,

  1420.      -1,  -4,   4,   1, -17,  17,  -1,  -9,   1,   1,   9,   1,  -5,  -1,  -1,   5,

  1421.      -7,   7,   6,  -6,   3,  -3,  18, -18,  19, -19,   1, -10,  -1,  10,  -5,   5,

  1422.      20, -20,  -3,   1,   3,   1,   8,  -1,  -8,   2,   7,  -1, -21,  -2,   5,  21,

  1423.       5,  -1,  -7,  -5,   1,  -6,  -5, -11,   6,  22,  11,   1,   1, -22,  -3,  -1,

  1424.       3,  -1,   3,  -3, -23,   4,  -4,   1,  23,  -1,   1,  -1,   1,  -2,   2,  -1}

  1425. },{

  1426.     /* MapTab8 */

  1427.     4,  /* eob_sym */

  1428.     11, /* esc_sym */

  1429.     /* run table */

  1430.     {1,  1,  1,  1,  0,  2,  2,  1,  1,  3,  3,  0,  1,  1,  2,  2,

  1431.      4,  4,  1,  1,  5,  5,  1,  1,  2,  2,  3,  3,  6,  6,  1,  1,

  1432.      7,  7,  8,  1,  8,  2,  2,  1,  4,  4,  1,  3,  1,  3,  9,  9,

  1433.      2,  2,  1,  5,  1,  5, 10, 10,  1,  1, 11, 11,  3,  6,  3,  4,

  1434.      4,  6,  2,  2,  1, 12,  1, 12,  7, 13,  7, 13,  1,  1,  8,  8,

  1435.      2,  2, 14, 14, 16, 15, 16,  5,  5,  1,  3, 15,  1,  3,  4,  4,

  1436.      1,  1, 17, 17,  2,  2,  6,  6,  1, 18,  1, 18, 22, 21, 22, 21,

  1437.     25, 24, 25, 19,  9, 20,  9, 23, 19, 24, 20,  3, 23,  7,  3,  1,

  1438.      1,  7, 28, 26, 29,  5, 28, 26,  5,  8, 29,  4,  8, 27,  2,  2,

  1439.      4, 27,  1,  1, 10, 36, 10, 33, 33, 36, 30,  1, 32, 32,  1, 30,

  1440.      6, 31, 31, 35,  3,  6, 11, 11,  3,  2, 35,  2, 34,  1, 34,  1,

  1441.     37, 37, 12,  7, 12,  5, 41,  5,  4,  7,  1,  8, 13,  4,  1, 41,

  1442.     13, 38,  8, 38,  9,  1, 40, 40,  9,  1, 39,  2,  2, 49, 39, 42,

  1443.      3,  3, 14, 16, 49, 14, 16, 42, 43, 43,  6,  6, 15,  1,  1, 15,

  1444.     44, 44,  1,  1, 50, 48,  4,  5,  4,  7,  5,  2, 10, 10, 48,  7,

  1445.     50, 45,  2,  1, 45,  8,  8,  1, 46, 46,  3, 47, 47,  3,  1,  1},

  1446. 

  1447.     /* value table */

  1448.     { 1,  -1,   2,  -2,   0,   1,  -1,   3,  -3,   1,  -1,   0,   4,  -4,   2,  -2,

  1449.       1,  -1,   5,  -5,   1,  -1,   6,  -6,   3,  -3,   2,  -2,   1,  -1,   7,  -7,

  1450.       1,  -1,   1,   8,  -1,   4,  -4,  -8,   2,  -2,   9,   3,  -9,  -3,   1,  -1,

  1451.       5,  -5,  10,   2, -10,  -2,   1,  -1,  11, -11,   1,  -1,  -4,   2,   4,   3,

  1452.      -3,  -2,   6,  -6,  12,   1, -12,  -1,   2,   1,  -2,  -1,  13, -13,   2,  -2,

  1453.       7,  -7,   1,  -1,   1,   1,  -1,   3,  -3,  14,   5,  -1, -14,  -5,   4,  -4,

  1454.      15, -15,   1,  -1,   8,  -8,  -3,   3,  16,   1, -16,  -1,   1,   1,  -1,  -1,

  1455.       1,   1,  -1,   1,   2,   1,  -2,   1,  -1,  -1,  -1,   6,  -1,   3,  -6,  17,

  1456.     -17,  -3,   1,   1,   1,   4,  -1,  -1,  -4,   3,  -1,   5,  -3,  -1,  -9,   9,

  1457.      -5,   1,  18, -18,   2,   1,  -2,   1,  -1,  -1,   1,  19,  -1,   1, -19,  -1,

  1458.       4,   1,  -1,   1,   7,  -4,  -2,   2,  -7,  10,  -1, -10,   1,  20,  -1, -20,

  1459.       1,  -1,   2,   4,  -2,   5,   1,  -5,   6,  -4,  21,   4,   2,  -6, -21,  -1,

  1460.      -2,   1,  -4,  -1,  -3,  22,  -1,   1,   3, -22,  -1,  11, -11,   1,   1,   1,

  1461.       8,  -8,   2,   2,  -1,  -2,  -2,  -1,   1,  -1,  -5,   5,   2,  23, -23,  -2,

  1462.       1,  -1,  24, -24,  -1,  -1,   7,   6,  -7,   5,  -6,  12,  -3,   3,   1,  -5,

  1463.       1,   1, -12,  25,  -1,  -5,   5, -25,  -1,   1,   9,   1,  -1,  -9,  26, -26}

  1464. }

  1465. };