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FFmpeg/libavcodec/ivi.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. #include "libavutil/attributes.h"

  32. #include "libavutil/timer.h"

  33. 

  34. #define BITSTREAM_READER_LE

  35. #include "avcodec.h"

  36. #include "bitstream.h"

  37. #include "internal.h"

  38. #include "mathops.h"

  39. #include "ivi.h"

  40. #include "ivi_dsp.h"

  41. 

  42. /**

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

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

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

  46.  * startup from these descriptors.

  47.  */

  48. /** static macroblock huffman tables */

  49. static const IVIHuffDesc ivi_mb_huff_desc[8] = {

  50.     {8,  {0, 4, 5, 4, 4, 4, 6, 6}},

  51.     {12, {0, 2, 2, 3, 3, 3, 3, 5, 3, 2, 2, 2}},

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

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

  54.     {13, {0, 4, 4, 3, 3, 3, 3, 2, 3, 3, 2, 1, 1}},

  55.     {9,  {0, 4, 4, 4, 4, 3, 3, 3, 2}},

  56.     {10, {0, 4, 4, 4, 4, 3, 3, 2, 2, 2}},

  57.     {12, {0, 4, 4, 4, 3, 3, 2, 3, 2, 2, 2, 2}}

  58. };

  59. 

  60. /** static block huffman tables */

  61. static const IVIHuffDesc ivi_blk_huff_desc[8] = {

  62.     {10, {1, 2, 3, 4, 4, 7, 5, 5, 4, 1}},

  63.     {11, {2, 3, 4, 4, 4, 7, 5, 4, 3, 3, 2}},

  64.     {12, {2, 4, 5, 5, 5, 5, 6, 4, 4, 3, 1, 1}},

  65.     {13, {3, 3, 4, 4, 5, 6, 6, 4, 4, 3, 2, 1, 1}},

  66.     {11, {3, 4, 4, 5, 5, 5, 6, 5, 4, 2, 2}},

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

  68.     {13, {3, 4, 5, 5, 5, 6, 5, 4, 3, 3, 2, 1, 1}},

  69.     {9,  {3, 4, 4, 5, 5, 5, 6, 5, 5}}

  70. };

  71. 

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

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

  74. 

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

  76.                              ptrdiff_t pitch, int mc_type);

  77. typedef void (*ivi_mc_avg_func) (int16_t *buf, const int16_t *ref_buf1,

  78.                                  const int16_t *ref_buf2,

  79.                                  ptrdiff_t pitch, int mc_type, int mc_type2);

  80. 

  81. static int ivi_mc(IVIBandDesc *band, ivi_mc_func mc, ivi_mc_avg_func mc_avg,

  82.                   int offs, int mv_x, int mv_y, int mv_x2, int mv_y2,

  83.                   int mc_type, int mc_type2)

  84. {

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

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

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

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

  89. 

  90.     if (mc_type != -1) {

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

  92.             return AVERROR_INVALIDDATA;

  93.         if (buf_size - min_size < offs)

  94.             return AVERROR_INVALIDDATA;

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

  96.             return AVERROR_INVALIDDATA;

  97.     }

  98. 

  99.     if (mc_type2 == -1) {

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

  101.     } else {

  102.         int ref_offs2 = offs + mv_y2 * band->pitch + mv_x2;

  103.         int ref_size2 = (mc_type2 > 1) * band->pitch + (mc_type2 & 1);

  104.         if (offs < 0 || ref_offs2 < 0 || !band->b_ref_buf)

  105.             return AVERROR_INVALIDDATA;

  106.         if (buf_size - min_size - ref_size2 < ref_offs2)

  107.             return AVERROR_INVALIDDATA;

  108. 

  109.         if (mc_type == -1)

  110.             mc(band->buf + offs, band->b_ref_buf + ref_offs2,

  111.                band->pitch, mc_type2);

  112.         else

  113.             mc_avg(band->buf + offs, band->ref_buf + ref_offs,

  114.                    band->b_ref_buf + ref_offs2, band->pitch,

  115.                    mc_type, mc_type2);

  116.     }

  117. 

  118.     return 0;

  119. }

  120. 

  121. /**

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

  123.  *  in the least significant bits.

  124.  */

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

  126. {

  127.     uint16_t res;

  128. 

  129.     if (nbits <= 8) {

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

  131.     } else

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

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

  134. 

  135.     return res;

  136. }

  137. 

  138. /*

  139.  *  Generate a huffman codebook from the given descriptor

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

  141.  *

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

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

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

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

  146.  */

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

  148. {

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

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

  151.     uint8_t     bits[256];

  152. 

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

  154. 

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

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

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

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

  159. 

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

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

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

  163. 

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

  165.             if (bits[pos] > IVI_VLC_BITS)

  166.                 return AVERROR_INVALIDDATA; /* invalid descriptor */

  167. 

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

  169.             if (!bits[pos])

  170.                 bits[pos] = 1;

  171. 

  172.             pos++;

  173.         }//for j

  174.     }//for i

  175. 

  176.     /* number of codewords = pos */

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

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

  179. }

  180. 

  181. av_cold void ff_ivi_init_static_vlc(void)

  182. {

  183.     int i;

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

  185.     static int initialized_vlcs = 0;

  186. 

  187.     if (initialized_vlcs)

  188.         return;

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

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

  191.         ivi_mb_vlc_tabs[i].table_allocated = 8192;

  192.         ivi_create_huff_from_desc(&ivi_mb_huff_desc[i],

  193.                                   &ivi_mb_vlc_tabs[i], 1);

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

  195.         ivi_blk_vlc_tabs[i].table_allocated = 8192;

  196.         ivi_create_huff_from_desc(&ivi_blk_huff_desc[i],

  197.                                   &ivi_blk_vlc_tabs[i], 1);

  198.     }

  199.     initialized_vlcs = 1;

  200. }

  201. 

  202. /*

  203.  *  Copy huffman codebook descriptors.

  204.  *

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

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

  207.  */

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

  209. {

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

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

  212. }

  213. 

  214. /*

  215.  *  Compare two huffman codebook descriptors.

  216.  *

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

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

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

  220.  */

  221. static int ivi_huff_desc_cmp(const IVIHuffDesc *desc1,

  222.                              const IVIHuffDesc *desc2)

  223. {

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

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

  226. }

  227. 

  228. int ff_ivi_dec_huff_desc(BitstreamContext *bc, int desc_coded, int which_tab,

  229.                          IVIHuffTab *huff_tab, AVCodecContext *avctx)

  230. {

  231.     int i, result;

  232.     IVIHuffDesc new_huff;

  233. 

  234.     if (!desc_coded) {

  235.         /* select default table */

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

  237.                                     : &ivi_mb_vlc_tabs [7];

  238.         return 0;

  239.     }

  240. 

  241.     huff_tab->tab_sel = bitstream_read(bc, 3);

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

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

  244.         new_huff.num_rows = bitstream_read(bc, 4);

  245.         if (!new_huff.num_rows) {

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

  247.             return AVERROR_INVALIDDATA;

  248.         }

  249. 

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

  251.             new_huff.xbits[i] = bitstream_read(bc, 4);

  252. 

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

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

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

  256. 

  257.             if (huff_tab->cust_tab.table)

  258.                 ff_free_vlc(&huff_tab->cust_tab);

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

  260.                     &huff_tab->cust_tab, 0);

  261.             if (result) {

  262.                 // reset faulty description

  263.                 huff_tab->cust_desc.num_rows = 0;

  264.                 av_log(avctx, AV_LOG_ERROR,

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

  266.                 return result;

  267.             }

  268.         }

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

  270.     } else {

  271.         /* select one of predefined tables */

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

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

  274.     }

  275. 

  276.     return 0;

  277. }

  278. 

  279. /*

  280.  *  Free planes, bands and macroblocks buffers.

  281.  *

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

  283.  */

  284. static av_cold void ivi_free_buffers(IVIPlaneDesc *planes)

  285. {

  286.     int p, b, t;

  287. 

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

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

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

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

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

  293.             av_freep(&planes[p].bands[b].bufs[3]);

  294. 

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

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

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

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

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

  300.         }

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

  302.         planes[p].num_bands = 0;

  303.     }

  304. }

  305. 

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

  307.                                int is_indeo4)

  308. {

  309.     int p, b;

  310.     uint32_t b_width, b_height, align_fac, width_aligned,

  311.              height_aligned, buf_size;

  312.     IVIBandDesc *band;

  313. 

  314.     ivi_free_buffers(planes);

  315. 

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

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

  318.         return AVERROR_INVALIDDATA;

  319. 

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

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

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

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

  324. 

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

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

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

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

  329. 

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

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

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

  333.             return AVERROR(ENOMEM);

  334. 

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

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

  337.          *  has only half size */

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

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

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

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

  342. 

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

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

  345.         align_fac       = p ? 8 : 16;

  346.         width_aligned   = FFALIGN(b_width , align_fac);

  347.         height_aligned  = FFALIGN(b_height, align_fac);

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

  349. 

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

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

  352.             band->plane    = p;

  353.             band->band_num = b;

  354.             band->width    = b_width;

  355.             band->height   = b_height;

  356.             band->pitch    = width_aligned;

  357.             band->aheight  = height_aligned;

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

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

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

  361.                 return AVERROR(ENOMEM);

  362. 

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

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

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

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

  367.                     return AVERROR(ENOMEM);

  368.             }

  369.             if (is_indeo4) {

  370.                 band->bufs[3]  = av_mallocz(buf_size);

  371.                 if (!band->bufs[3])

  372.                     return AVERROR(ENOMEM);

  373.             }

  374.             /* reset custom vlc */

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

  376.         }

  377.     }

  378. 

  379.     return 0;

  380. }

  381. 

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

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

  384. {

  385.     int x, y;

  386.     IVITile *tile = band->tiles;

  387. 

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

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

  390.             tile->xpos     = x;

  391.             tile->ypos     = y;

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

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

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

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

  396.             /* calculate number of macroblocks */

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

  398.                                               band->mb_size);

  399. 

  400.             av_freep(&tile->mbs);

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

  402.             if (!tile->mbs)

  403.                 return AVERROR(ENOMEM);

  404. 

  405.             tile->ref_mbs = 0;

  406.             if (p || b) {

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

  408.                     return AVERROR_INVALIDDATA;

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

  410.                 ref_tile++;

  411.             }

  412.             tile++;

  413.         }

  414.     }

  415. 

  416.     return 0;

  417. }

  418. 

  419. av_cold int ff_ivi_init_tiles(IVIPlaneDesc *planes,

  420.                               int tile_width, int tile_height)

  421. {

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

  423.     IVIBandDesc *band;

  424. 

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

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

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

  428. 

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

  430.             t_width  >>= 1;

  431.             t_height >>= 1;

  432.         }

  433. 

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

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

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

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

  438.             band->num_tiles = x_tiles * y_tiles;

  439. 

  440.             av_freep(&band->tiles);

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

  442.             if (!band->tiles)

  443.                 return AVERROR(ENOMEM);

  444. 

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

  446.              * and quant */

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

  448.                                  p, b, t_height, t_width);

  449.             if (ret < 0)

  450.                 return ret;

  451.         }

  452.     }

  453. 

  454.     return 0;

  455. }

  456. 

  457. /*

  458.  *  Decode size of the tile data.

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

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

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

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

  463.  *

  464.  *  @param[in,out]  bc  the Bitstream context

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

  466.  */

  467. static int ivi_dec_tile_data_size(BitstreamContext *bc)

  468. {

  469.     int    len;

  470. 

  471.     len = 0;

  472.     if (bitstream_read_bit(bc)) {

  473.         len = bitstream_read(bc, 8);

  474.         if (len == 255)

  475.             len = bitstream_read(bc, 24);

  476.     }

  477. 

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

  479.     bitstream_align(bc);

  480. 

  481.     return len;

  482. }

  483. 

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

  485.                             int blk_size)

  486. {

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

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

  489. 

  490.     if (!band->dc_transform)

  491.         return 0;

  492. 

  493. 

  494.     if (min_size > buf_size)

  495.         return AVERROR_INVALIDDATA;

  496. 

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

  498.                        band->pitch, blk_size);

  499. 

  500.     return 0;

  501. }

  502. 

  503. static int ivi_decode_coded_blocks(BitstreamContext *bc, IVIBandDesc *band,

  504.                                    ivi_mc_func mc, ivi_mc_avg_func mc_avg,

  505.                                    int mv_x, int mv_y,

  506.                                    int mv_x2, int mv_y2,

  507.                                    int *prev_dc, int is_intra,

  508.                                    int mc_type, int mc_type2,

  509.                                    uint32_t quant, int offs,

  510.                                    AVCodecContext *avctx)

  511. {

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

  513.     RVMapDesc *rvmap = band->rv_map;

  514.     uint8_t col_flags[8];

  515.     int32_t trvec[64];

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

  517.     int pos, run, val;

  518.     int blk_size   = band->blk_size;

  519.     int num_coeffs = blk_size * blk_size;

  520.     int col_mask   = blk_size - 1;

  521.     int scan_pos   = -1;

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

  523.                      band->transform_size;

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

  525. 

  526.     if (min_size > buf_size)

  527.         return AVERROR_INVALIDDATA;

  528. 

  529.     if (!band->scan) {

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

  531.         return AVERROR_INVALIDDATA;

  532.     }

  533. 

  534.     /* zero transform vector */

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

  536.     /* zero column flags */

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

  538.     while (scan_pos <= num_coeffs) {

  539.         sym = bitstream_read_vlc(bc, band->blk_vlc.tab->table, IVI_VLC_BITS, 1);

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

  541.             break; /* End of block */

  542. 

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

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

  545.             run = bitstream_read_vlc(bc, band->blk_vlc.tab->table, IVI_VLC_BITS, 1) + 1;

  546.             lo  = bitstream_read_vlc(bc, band->blk_vlc.tab->table, IVI_VLC_BITS, 1);

  547.             hi  = bitstream_read_vlc(bc, band->blk_vlc.tab->table, IVI_VLC_BITS, 1);

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

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

  550.         } else {

  551.             if (sym >= 256U) {

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

  553.                 return AVERROR_INVALIDDATA;

  554.             }

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

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

  557.         }

  558. 

  559.         /* de-zigzag and dequantize */

  560.         scan_pos += run;

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

  562.             break;

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

  564. 

  565.         if (!val)

  566.             ff_dlog(avctx, "Val = 0 encountered!\n");

  567. 

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

  569.         if (q > 1)

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

  571.         trvec[pos] = val;

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

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

  574.     }

  575. 

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

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

  578. 

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

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

  581.         *prev_dc     += trvec[0];

  582.         trvec[0]      = *prev_dc;

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

  584.     }

  585. 

  586.     /* apply inverse transform */

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

  588.                         band->pitch, col_flags);

  589. 

  590.     /* apply motion compensation */

  591.     if (!is_intra)

  592.         return ivi_mc(band, mc, mc_avg, offs, mv_x, mv_y, mv_x2, mv_y2,

  593.                       mc_type, mc_type2);

  594. 

  595.     return 0;

  596. }

  597. /*

  598.  *  Decode block data:

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

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

  601.  *  in order to reconstruct the picture.

  602.  *

  603.  *  @param[in,out]  bc    the Bitstream context

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

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

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

  607.  */

  608. static int ivi_decode_blocks(BitstreamContext *bc, IVIBandDesc *band,

  609.                              IVITile *tile, AVCodecContext *avctx)

  610. {

  611.     int mbn, blk, num_blocks, blk_size, ret, is_intra;

  612.     int mc_type = 0, mc_type2 = -1;

  613.     int mv_x = 0, mv_y = 0, mv_x2 = 0, mv_y2 = 0;

  614.     int32_t prev_dc;

  615.     uint32_t cbp, quant, buf_offs;

  616.     IVIMbInfo *mb;

  617.     ivi_mc_func mc_with_delta_func, mc_no_delta_func;

  618.     ivi_mc_avg_func mc_avg_with_delta_func, mc_avg_no_delta_func;

  619.     const uint8_t *scale_tab;

  620. 

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

  622.     prev_dc    = 0;

  623.     blk_size   = band->blk_size;

  624.     /* number of blocks per mb */

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

  626.     if (blk_size == 8) {

  627.         mc_with_delta_func     = ff_ivi_mc_8x8_delta;

  628.         mc_no_delta_func       = ff_ivi_mc_8x8_no_delta;

  629.         mc_avg_with_delta_func = ff_ivi_mc_avg_8x8_delta;

  630.         mc_avg_no_delta_func   = ff_ivi_mc_avg_8x8_no_delta;

  631.     } else {

  632.         mc_with_delta_func     = ff_ivi_mc_4x4_delta;

  633.         mc_no_delta_func       = ff_ivi_mc_4x4_no_delta;

  634.         mc_avg_with_delta_func = ff_ivi_mc_avg_4x4_delta;

  635.         mc_avg_no_delta_func   = ff_ivi_mc_avg_4x4_no_delta;

  636.     }

  637. 

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

  639.         is_intra = !mb->type;

  640.         cbp      = mb->cbp;

  641.         buf_offs = mb->buf_offs;

  642. 

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

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

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

  646.         else

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

  648. 

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

  650.         if (scale_tab)

  651.             quant = scale_tab[quant];

  652. 

  653.         if (!is_intra) {

  654.             mv_x  = mb->mv_x;

  655.             mv_y  = mb->mv_y;

  656.             mv_x2 = mb->b_mv_x;

  657.             mv_y2 = mb->b_mv_y;

  658.             if (band->is_halfpel) {

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

  660.                 mc_type2 = ((mv_y2 & 1) << 1) | (mv_x2 & 1);

  661.                 mv_x  >>= 1;

  662.                 mv_y  >>= 1;

  663.                 mv_x2 >>= 1;

  664.                 mv_y2 >>= 1; /* convert halfpel vectors into fullpel ones */

  665.             }

  666.             if (mb->type == 2)

  667.                 mc_type = -1;

  668.             if (mb->type != 2 && mb->type != 3)

  669.                 mc_type2 = -1;

  670.             if (mb->type) {

  671.                 int dmv_x, dmv_y, cx, cy;

  672. 

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

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

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

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

  677. 

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

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

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

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

  682.                     return AVERROR_INVALIDDATA;

  683.                 }

  684.             }

  685.             if (mb->type == 2 || mb->type == 3) {

  686.                 int dmv_x, dmv_y, cx, cy;

  687. 

  688.                 dmv_x = mb->b_mv_x >> band->is_halfpel;

  689.                 dmv_y = mb->b_mv_y >> band->is_halfpel;

  690.                 cx    = mb->b_mv_x &  band->is_halfpel;

  691.                 cy    = mb->b_mv_y &  band->is_halfpel;

  692. 

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

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

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

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

  697.                     return AVERROR_INVALIDDATA;

  698.                 }

  699.             }

  700.         }

  701. 

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

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

  704.             if (blk & 1) {

  705.                 buf_offs += blk_size;

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

  707.                 buf_offs -= blk_size;

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

  709.             }

  710. 

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

  712.                 ret = ivi_decode_coded_blocks(bc, band, mc_with_delta_func,

  713.                                               mc_avg_with_delta_func,

  714.                                               mv_x, mv_y, mv_x2, mv_y2,

  715.                                               &prev_dc, is_intra,

  716.                                               mc_type, mc_type2, quant,

  717.                                               buf_offs, avctx);

  718.                 if (ret < 0)

  719.                     return ret;

  720.             } else {

  721.                 /* block not coded */

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

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

  724.                 if (is_intra) {

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

  726.                     if (ret < 0)

  727.                         return ret;

  728.                 } else {

  729.                     ret = ivi_mc(band, mc_no_delta_func, mc_avg_no_delta_func,

  730.                                  buf_offs, mv_x, mv_y, mv_x2, mv_y2,

  731.                                  mc_type, mc_type2);

  732.                     if (ret < 0)

  733.                         return ret;

  734.                 }

  735.             }

  736. 

  737.             cbp >>= 1;

  738.         }// for blk

  739.     }// for mbn

  740. 

  741.     bitstream_align(bc);

  742. 

  743.     return 0;

  744. }

  745. 

  746. /**

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

  748.  *  compensation respectively.

  749.  *

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

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

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

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

  754.  */

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

  756.                                   IVITile *tile, int32_t mv_scale)

  757. {

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

  759.     int             offs, mb_offset, row_offset, ret;

  760.     IVIMbInfo       *mb, *ref_mb;

  761.     const int16_t   *src;

  762.     int16_t         *dst;

  763.     ivi_mc_func     mc_no_delta_func;

  764. 

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

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

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

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

  769.         return AVERROR_INVALIDDATA;

  770.     }

  771. 

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

  773.     mb         = tile->mbs;

  774.     ref_mb     = tile->ref_mbs;

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

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

  777. 

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

  779.         mb_offset = offs;

  780. 

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

  782.             mb->xpos     = x;

  783.             mb->ypos     = y;

  784.             mb->buf_offs = mb_offset;

  785. 

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

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

  788. 

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

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

  791.                 mb->mv_x    = 0;

  792.                 mb->mv_y    = 0;

  793.             }

  794. 

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

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

  797. 

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

  799.                 /* motion vector inheritance */

  800.                 if (mv_scale) {

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

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

  803.                 } else {

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

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

  806.                 }

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

  808.             }

  809. 

  810.             mb++;

  811.             if (ref_mb)

  812.                 ref_mb++;

  813.             mb_offset += band->mb_size;

  814.         } // for x

  815.         offs += row_offset;

  816.     } // for y

  817. 

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

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

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

  821.                                                  : ff_ivi_mc_4x4_no_delta;

  822. 

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

  824.             mv_x = mb->mv_x;

  825.             mv_y = mb->mv_y;

  826.             if (!band->is_halfpel) {

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

  828.             } else {

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

  830.                 mv_x >>= 1;

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

  832.             }

  833. 

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

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

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

  837.                 ret = ivi_mc(band, mc_no_delta_func, 0, offs,

  838.                              mv_x, mv_y, 0, 0, mc_type, -1);

  839.                 if (ret < 0)

  840.                     return ret;

  841.             }

  842.         }

  843.     } else {

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

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

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

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

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

  849.             src += band->pitch;

  850.             dst += band->pitch;

  851.         }

  852.     }

  853. 

  854.     return 0;

  855. }

  856. 

  857. 

  858. #ifdef DEBUG

  859. static uint16_t ivi_calc_band_checksum(IVIBandDesc *band)

  860. {

  861.     int         x, y;

  862.     int16_t     *src, checksum;

  863. 

  864.     src = band->buf;

  865.     checksum = 0;

  866. 

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

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

  869.             checksum += src[x];

  870. 

  871.     return checksum;

  872. }

  873. #endif

  874. 

  875. /*

  876.  *  Convert and output the current plane.

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

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

  879.  *

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

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

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

  883.  */

  884. static void ivi_output_plane(IVIPlaneDesc *plane, uint8_t *dst, ptrdiff_t dst_pitch)

  885. {

  886.     int             x, y;

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

  888.     ptrdiff_t       pitch = plane->bands[0].pitch;

  889. 

  890.     if (!src)

  891.         return;

  892. 

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

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

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

  896.         src += pitch;

  897.         dst += dst_pitch;

  898.     }

  899. }

  900. 

  901. /**

  902.  *  Decode an Indeo 4 or 5 band.

  903.  *

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

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

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

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

  908.  */

  909. static int decode_band(IVI45DecContext *ctx,

  910.                        IVIBandDesc *band, AVCodecContext *avctx)

  911. {

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

  913.     IVITile     *tile;

  914. 

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

  916.     if (!band->buf) {

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

  918.         return AVERROR_INVALIDDATA;

  919.     }

  920.     if (ctx->is_indeo4 && ctx->frame_type == IVI4_FRAMETYPE_BIDIR) {

  921.         band->ref_buf   = band->bufs[ctx->b_ref_buf];

  922.         band->b_ref_buf = band->bufs[ctx->ref_buf];

  923.     } else {

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

  925.         band->b_ref_buf = 0;

  926.     }

  927.     band->data_ptr  = ctx->frame_data + (bitstream_tell(&ctx->bc) >> 3);

  928. 

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

  930.     if (result) {

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

  932.                result);

  933.         return result;

  934.     }

  935. 

  936.     if (band->is_empty) {

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

  938.         return AVERROR_INVALIDDATA;

  939.     }

  940. 

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

  942. 

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

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

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

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

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

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

  949.     }

  950. 

  951.     pos = bitstream_tell(&ctx->bc);

  952. 

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

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

  955. 

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

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

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

  959.             return AVERROR_INVALIDDATA;

  960.         }

  961.         tile->is_empty = bitstream_read_bit(&ctx->bc);

  962.         if (tile->is_empty) {

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

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

  965.             if (result < 0)

  966.                 break;

  967.             ff_dlog(avctx, "Empty tile encountered!\n");

  968.         } else {

  969.             tile->data_size = ivi_dec_tile_data_size(&ctx->bc);

  970.             if (!tile->data_size) {

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

  972.                 return AVERROR_INVALIDDATA;

  973.             }

  974. 

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

  976.             if (result < 0)

  977.                 break;

  978. 

  979.             result = ivi_decode_blocks(&ctx->bc, band, tile, avctx);

  980.             if (result < 0) {

  981.                 av_log(avctx, AV_LOG_ERROR,

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

  983.                 break;

  984.             }

  985. 

  986.             if (((bitstream_tell(&ctx->bc) - pos) >> 3) != tile->data_size) {

  987.                 av_log(avctx, AV_LOG_ERROR,

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

  989.                 result = AVERROR_INVALIDDATA;

  990.                 break;

  991.             }

  992. 

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

  994.         }

  995.     }

  996. 

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

  998.      * reverse order */

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

  1000.         idx1 = band->corr[i*2];

  1001.         idx2 = band->corr[i*2+1];

  1002.         FFSWAP(uint8_t, band->rv_map->runtab[idx1], band->rv_map->runtab[idx2]);

  1003.         FFSWAP(int16_t, band->rv_map->valtab[idx1], band->rv_map->valtab[idx2]);

  1004.     }

  1005. 

  1006. #ifdef DEBUG

  1007.     if (band->checksum_present) {

  1008.         uint16_t chksum = ivi_calc_band_checksum(band);

  1009.         if (chksum != band->checksum) {

  1010.             av_log(avctx, AV_LOG_ERROR,

  1011.                    "Band checksum mismatch! Plane %d, band %d, "

  1012.                    "received: %"PRIx32", calculated: %"PRIx16"\n",

  1013.                    band->plane, band->band_num, band->checksum, chksum);

  1014.         }

  1015.     }

  1016. #endif

  1017. 

  1018.     bitstream_align(&ctx->bc);

  1019. 

  1020.     return result;

  1021. }

  1022. 

  1023. int ff_ivi_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,

  1024.                         AVPacket *avpkt)

  1025. {

  1026.     IVI45DecContext *ctx = avctx->priv_data;

  1027.     const uint8_t   *buf = avpkt->data;

  1028.     AVFrame       *frame = data;

  1029.     int             buf_size = avpkt->size;

  1030.     int             result, p, b;

  1031. 

  1032.     bitstream_init8(&ctx->bc, buf, buf_size);

  1033.     ctx->frame_data = buf;

  1034.     ctx->frame_size = buf_size;

  1035. 

  1036.     result = ctx->decode_pic_hdr(ctx, avctx);

  1037.     if (result) {

  1038.         av_log(avctx, AV_LOG_ERROR,

  1039.                "Error while decoding picture header: %d\n", result);

  1040.         return result;

  1041.     }

  1042.     if (ctx->gop_invalid)

  1043.         return AVERROR_INVALIDDATA;

  1044. 

  1045.     if (ctx->is_indeo4 && ctx->frame_type == IVI4_FRAMETYPE_NULL_LAST) {

  1046.         if (ctx->got_p_frame) {

  1047.             av_frame_move_ref(data, ctx->p_frame);

  1048.             *got_frame = 1;

  1049.             ctx->got_p_frame = 0;

  1050.         } else {

  1051.             *got_frame = 0;

  1052.         }

  1053.         return buf_size;

  1054.     }

  1055. 

  1056.     if (ctx->gop_flags & IVI5_IS_PROTECTED) {

  1057.         avpriv_report_missing_feature(avctx, "Password-protected clip");

  1058.         return AVERROR_PATCHWELCOME;

  1059.     }

  1060. 

  1061.     if (!ctx->planes[0].bands) {

  1062.         av_log(avctx, AV_LOG_ERROR, "Color planes not initialized yet\n");

  1063.         return AVERROR_INVALIDDATA;

  1064.     }

  1065. 

  1066.     ctx->switch_buffers(ctx);

  1067. 

  1068.     //{ START_TIMER;

  1069. 

  1070.     if (ctx->is_nonnull_frame(ctx)) {

  1071.         for (p = 0; p < 3; p++) {

  1072.             for (b = 0; b < ctx->planes[p].num_bands; b++) {

  1073.                 result = decode_band(ctx, &ctx->planes[p].bands[b], avctx);

  1074.                 if (result < 0) {

  1075.                     av_log(avctx, AV_LOG_ERROR,

  1076.                            "Error while decoding band: %d, plane: %d\n", b, p);

  1077.                     return result;

  1078.                 }

  1079.             }

  1080.         }

  1081.     } else {

  1082.         if (ctx->is_scalable)

  1083.             return AVERROR_INVALIDDATA;

  1084. 

  1085.         for (p = 0; p < 3; p++) {

  1086.             if (!ctx->planes[p].bands[0].buf)

  1087.                 return AVERROR_INVALIDDATA;

  1088.         }

  1089.     }

  1090. 

  1091.     //STOP_TIMER("decode_planes"); }

  1092. 

  1093.     result = ff_set_dimensions(avctx, ctx->planes[0].width, ctx->planes[0].height);

  1094.     if (result < 0)

  1095.         return result;

  1096. 

  1097.     if ((result = ff_get_buffer(avctx, frame, 0)) < 0) {

  1098.         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");

  1099.         return result;

  1100.     }

  1101. 

  1102.     if (ctx->is_scalable) {

  1103.         if (ctx->is_indeo4)

  1104.             ff_ivi_recompose_haar(&ctx->planes[0], frame->data[0], frame->linesize[0]);

  1105.         else

  1106.             ff_ivi_recompose53   (&ctx->planes[0], frame->data[0], frame->linesize[0]);

  1107.     } else {

  1108.         ivi_output_plane(&ctx->planes[0], frame->data[0], frame->linesize[0]);

  1109.     }

  1110. 

  1111.     ivi_output_plane(&ctx->planes[2], frame->data[1], frame->linesize[1]);

  1112.     ivi_output_plane(&ctx->planes[1], frame->data[2], frame->linesize[2]);

  1113. 

  1114.     *got_frame = 1;

  1115. 

  1116.     /* If the bidirectional mode is enabled, next I and the following P

  1117.      * frame will be sent together. Unfortunately the approach below seems

  1118.      * to be the only way to handle the B-frames mode.

  1119.      * That's exactly the same Intel decoders do.

  1120.      */

  1121.     if (ctx->is_indeo4 && ctx->frame_type == IVI4_FRAMETYPE_INTRA) {

  1122.         int left;

  1123. 

  1124.         while (bitstream_read(&ctx->bc, 8)); // skip version string

  1125.         left = bitstream_tell(&ctx->bc) & 0x18;

  1126.         bitstream_skip(&ctx->bc, 64 - left);

  1127.         if (bitstream_bits_left(&ctx->bc) > 18 &&

  1128.             bitstream_peek(&ctx->bc, 21) == 0xBFFF8) { // syncheader + inter type

  1129.             AVPacket pkt;

  1130.             pkt.data = avpkt->data + (bitstream_tell(&ctx->bc) >> 3);

  1131.             pkt.size = bitstream_bits_left(&ctx->bc) >> 3;

  1132.             ff_ivi_decode_frame(avctx, ctx->p_frame, &ctx->got_p_frame, &pkt);

  1133.         }

  1134.     }

  1135. 

  1136.     if (ctx->show_indeo4_info) {

  1137.         if (ctx->is_scalable)

  1138.             av_log(avctx, AV_LOG_DEBUG, "This video uses scalability mode\n");

  1139.         if (ctx->uses_tiling)

  1140.             av_log(avctx, AV_LOG_DEBUG, "This video uses local decoding\n");

  1141.         if (ctx->has_b_frames)

  1142.             av_log(avctx, AV_LOG_DEBUG, "This video contains B-frames\n");

  1143.         if (ctx->has_transp)

  1144.             av_log(avctx, AV_LOG_DEBUG, "Transparency mode is enabled\n");

  1145.         if (ctx->uses_haar)

  1146.             av_log(avctx, AV_LOG_DEBUG, "This video uses Haar transform\n");

  1147.         if (ctx->uses_fullpel)

  1148.             av_log(avctx, AV_LOG_DEBUG, "This video uses fullpel motion vectors\n");

  1149.         ctx->show_indeo4_info = 0;

  1150.     }

  1151. 

  1152.     return buf_size;

  1153. }

  1154. 

  1155. /**

  1156.  *  Close Indeo5 decoder and clean up its context.

  1157.  */

  1158. av_cold int ff_ivi_decode_close(AVCodecContext *avctx)

  1159. {

  1160.     IVI45DecContext *ctx = avctx->priv_data;

  1161. 

  1162.     ivi_free_buffers(&ctx->planes[0]);

  1163. 

  1164.     if (ctx->mb_vlc.cust_tab.table)

  1165.         ff_free_vlc(&ctx->mb_vlc.cust_tab);

  1166. 

  1167.     av_frame_free(&ctx->p_frame);

  1168. 

  1169.     return 0;

  1170. }

  1171. 

  1172. 

  1173. /**

  1174.  *  Scan patterns shared between indeo4 and indeo5

  1175.  */

  1176. const uint8_t ff_ivi_vertical_scan_8x8[64] = {

  1177.     0,  8, 16, 24, 32, 40, 48, 56,

  1178.     1,  9, 17, 25, 33, 41, 49, 57,

  1179.     2, 10, 18, 26, 34, 42, 50, 58,

  1180.     3, 11, 19, 27, 35, 43, 51, 59,

  1181.     4, 12, 20, 28, 36, 44, 52, 60,

  1182.     5, 13, 21, 29, 37, 45, 53, 61,

  1183.     6, 14, 22, 30, 38, 46, 54, 62,

  1184.     7, 15, 23, 31, 39, 47, 55, 63

  1185. };

  1186. 

  1187. const uint8_t ff_ivi_horizontal_scan_8x8[64] = {

  1188.      0,  1,  2,  3,  4,  5,  6,  7,

  1189.      8,  9, 10, 11, 12, 13, 14, 15,

  1190.     16, 17, 18, 19, 20, 21, 22, 23,

  1191.     24, 25, 26, 27, 28, 29, 30, 31,

  1192.     32, 33, 34, 35, 36, 37, 38, 39,

  1193.     40, 41, 42, 43, 44, 45, 46, 47,

  1194.     48, 49, 50, 51, 52, 53, 54, 55,

  1195.     56, 57, 58, 59, 60, 61, 62, 63

  1196. };

  1197. 

  1198. const uint8_t ff_ivi_direct_scan_4x4[16] = {

  1199.     0, 1, 4, 8, 5, 2, 3, 6, 9, 12, 13, 10, 7, 11, 14, 15

  1200. };

  1201. 

  1202. 

  1203. /**

  1204.  *  Run-value (RLE) tables.

  1205.  */

  1206. const RVMapDesc ff_ivi_rvmap_tabs[9] = {

  1207. {   /* MapTab0 */

  1208.     5, /* eob_sym */

  1209.     2, /* esc_sym */

  1210.     /* run table */

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

  1212.      1,  1,  2,  2,  1,  1,  4,  4,  1,  1,  1,  1,  2,  2,  5,  5,

  1213.      1,  1,  3,  3,  1,  1,  6,  6,  1,  2,  1,  2,  7,  7,  1,  1,

  1214.      8,  8,  1,  1,  4,  2,  1,  4,  2,  1,  3,  3,  1,  1,  1,  9,

  1215.      9,  1,  2,  1,  2,  1,  5,  5,  1,  1, 10, 10,  1,  1,  3,  3,

  1216.      2,  2,  1,  1, 11, 11,  6,  4,  4,  1,  6,  1,  2,  1,  2, 12,

  1217.      8,  1, 12,  7,  8,  7,  1, 16,  1, 16,  1,  3,  3, 13,  1, 13,

  1218.      2,  2,  1, 15,  1,  5, 14, 15,  1,  5, 14,  1, 17,  8, 17,  8,

  1219.      1,  4,  4,  2,  2,  1, 25, 25, 24, 24,  1,  3,  1,  3,  1,  8,

  1220.      6,  7,  6,  1, 18,  8, 18,  1,  7, 23,  2,  2, 23,  1,  1, 21,

  1221.     22,  9,  9, 22, 19,  1, 21,  5, 19,  5,  1, 33, 20, 33, 20,  8,

  1222.      4,  4,  1, 32,  2,  2,  8,  3, 32, 26,  3,  1,  7,  7, 26,  6,

  1223.      1,  6,  1,  1, 16,  1, 10,  1, 10,  2, 16, 29, 28,  2, 29, 28,

  1224.      1, 27,  5,  8,  5, 27,  1,  8,  3,  7,  3, 31, 41, 31,  1, 41,

  1225.      6,  1,  6,  7,  4,  4,  1,  1,  2,  1,  2, 11, 34, 30, 11,  1,

  1226.     30, 15, 15, 34, 36, 40, 36, 40, 35, 35, 37, 37, 39, 39, 38, 38},

  1227. 

  1228.     /* value table */

  1229.     { 1,  -1,   0,   2,  -2,   0,   3,  -3,   1,  -1,   4,  -4,   5,  -5,   1,  -1,

  1230.       6,  -6,   2,  -2,   7,  -7,   1,  -1,   8,  -8,   9,  -9,   3,  -3,   1,  -1,

  1231.      10, -10,   2,  -2,  11, -11,   1,  -1,  12,   4, -12,  -4,   1,  -1,  13, -13,

  1232.       1,  -1,  14, -14,   2,   5,  15,  -2,  -5, -15,  -3,   3,  16, -16,  17,   1,

  1233.      -1, -17,   6,  18,  -6, -18,   2,  -2,  19, -19,   1,  -1,  20, -20,   4,  -4,

  1234.       7,  -7,  21, -21,   1,  -1,   2,   3,  -3,  22,  -2, -22,   8,  23,  -8,   1,

  1235.       2, -23,  -1,   2,  -2,  -2,  24,   1, -24,  -1,  25,   5,  -5,   1, -25,  -1,

  1236.       9,  -9,  26,   1, -26,   3,   1,  -1,  27,  -3,  -1, -27,   1,   3,  -1,  -3,

  1237.      28,  -4,   4,  10, -10, -28,   1,  -1,   1,  -1,  29,   6, -29,  -6,  30,  -4,

  1238.       3,   3,  -3, -30,   1,   4,  -1,  31,  -3,   1,  11, -11,  -1, -31,  32,  -1,

  1239.      -1,   2,  -2,   1,   1, -32,   1,   4,  -1,  -4,  33,  -1,   1,   1,  -1,   5,

  1240.       5,  -5, -33,  -1, -12,  12,  -5,  -7,   1,   1,   7,  34,   4,  -4,  -1,   4,

  1241.     -34,  -4,  35,  36,  -2, -35,  -2, -36,   2,  13,   2,  -1,   1, -13,   1,  -1,

  1242.      37,   1,  -5,   6,   5,  -1,  38,  -6,  -8,   5,   8,  -1,   1,   1, -37,  -1,

  1243.       5,  39,  -5,  -5,   6,  -6, -38, -39, -14,  40,  14,   2,   1,   1,  -2, -40,

  1244.      -1,  -2,   2,  -1,  -1,  -1,   1,   1,   1,  -1,   1,  -1,   1,  -1,   1,  -1}

  1245. },{

  1246.     /* MapTab1 */

  1247.     0,  /* eob_sym */

  1248.     38, /* esc_sym */

  1249.     /* run table */

  1250.     {0,  1,  1,  2,  2,  3,  3,  4,  4,  5,  5,  6,  8,  6,  8,  7,

  1251.      7,  9,  9, 10, 10, 11, 11,  1, 12,  1, 12, 13, 13, 16, 14, 16,

  1252.     14, 15, 15, 17, 17, 18,  0, 18, 19, 20, 21, 19, 22, 21, 20, 22,

  1253.     25, 24,  2, 25, 24, 23, 23,  2, 26, 28, 26, 28, 29, 27, 29, 27,

  1254.     33, 33,  1, 32,  1,  3, 32, 30, 36,  3, 36, 30, 31, 31, 35, 34,

  1255.     37, 41, 34, 35, 37,  4, 41,  4, 49,  8,  8, 49, 40, 38,  5, 38,

  1256.     40, 39,  5, 39, 42, 43, 42,  7, 57,  6, 43, 44,  6, 50,  7, 44,

  1257.     57, 48, 50, 48, 45, 45, 46, 47, 51, 46, 47, 58,  1, 51, 58,  1,

  1258.     52, 59, 53,  9, 52, 55, 55, 59, 53, 56, 54, 56, 54,  9, 64, 64,

  1259.     60, 63, 60, 63, 61, 62, 61, 62,  2, 10,  2, 10, 11,  1, 11, 13,

  1260.     12,  1, 12, 13, 16, 16,  8,  8, 14,  3,  3, 15, 14, 15,  4,  4,

  1261.      1, 17, 17,  5,  1,  7,  7,  5,  6,  1,  2,  2,  6, 22,  1, 25,

  1262.     21, 22,  8, 24,  1, 21, 25, 24,  8, 18, 18, 23,  9, 20, 23, 33,

  1263.     29, 33, 20,  1, 19,  1, 29, 36,  9, 36, 19, 41, 28, 57, 32,  3,

  1264.     28,  3,  1, 27, 49, 49,  1, 32, 26, 26,  2,  4,  4,  7, 57, 41,

  1265.      2,  7, 10,  5, 37, 16, 10, 27,  8,  8, 13, 16, 37, 13,  1,  5},

  1266. 

  1267.     /* value table */

  1268.     {0,   1,  -1,   1,  -1,   1,  -1,   1,  -1,   1,  -1,   1,   1,  -1,  -1,   1,

  1269.     -1,   1,  -1,   1,  -1,   1,  -1,   2,   1,  -2,  -1,   1,  -1,   1,   1,  -1,

  1270.     -1,   1,  -1,   1,  -1,   1,   0,  -1,   1,   1,   1,  -1,   1,  -1,  -1,  -1,

  1271.      1,   1,   2,  -1,  -1,   1,  -1,  -2,   1,   1,  -1,  -1,   1,   1,  -1,  -1,

  1272.      1,  -1,   3,   1,  -3,   2,  -1,   1,   1,  -2,  -1,  -1,  -1,   1,   1,   1,

  1273.      1,   1,  -1,  -1,  -1,   2,  -1,  -2,   1,   2,  -2,  -1,   1,   1,   2,  -1,

  1274.     -1,   1,  -2,  -1,   1,   1,  -1,   2,   1,   2,  -1,   1,  -2,  -1,  -2,  -1,

  1275.     -1,   1,   1,  -1,   1,  -1,   1,   1,   1,  -1,  -1,   1,   4,  -1,  -1,  -4,

  1276.      1,   1,   1,   2,  -1,  -1,   1,  -1,  -1,   1,  -1,  -1,   1,  -2,   1,  -1,

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

  1278.      2,  -5,  -2,  -2,  -2,   2,  -3,   3,   2,   3,  -3,   2,  -2,  -2,   3,  -3,

  1279.      6,   2,  -2,   3,  -6,   3,  -3,  -3,   3,   7,  -4,   4,  -3,   2,  -7,   2,

  1280.      2,  -2,  -4,   2,   8,  -2,  -2,  -2,   4,   2,  -2,   2,   3,   2,  -2,  -2,

  1281.      2,   2,  -2,  -8,  -2,   9,  -2,   2,  -3,  -2,   2,  -2,   2,   2,   2,   4,

  1282.     -2,  -4,  10,   2,   2,  -2,  -9,  -2,   2,  -2,   5,   4,  -4,   4,  -2,   2,

  1283.     -5,  -4,  -3,   4,   2,  -3,   3,  -2,  -5,   5,   3,   3,  -2,  -3, -10,  -4}

  1284. },{

  1285.     /* MapTab2 */

  1286.     2,  /* eob_sym */

  1287.     11, /* esc_sym */

  1288.     /* run table */

  1289.     {1,  1,  0,  2,  2,  1,  1,  3,  3,  4,  4,  0,  1,  1,  5,  5,

  1290.      2,  2,  6,  6,  7,  7,  1,  8,  1,  8,  3,  3,  9,  9,  1,  2,

  1291.      2,  1,  4, 10,  4, 10, 11, 11,  1,  5, 12, 12,  1,  5, 13, 13,

  1292.      3,  3,  6,  6,  2,  2, 14, 14, 16, 16, 15,  7, 15,  8,  8,  7,

  1293.      1,  1, 17, 17,  4,  4,  1,  1, 18, 18,  2,  2,  5,  5, 25,  3,

  1294.      9,  3, 25,  9, 19, 24, 19, 24,  1, 21, 20,  1, 21, 22, 20, 22,

  1295.     23, 23,  8,  6, 33,  6,  8, 33,  7,  7, 26, 26,  1, 32,  1, 32,

  1296.     28,  4, 28, 10, 29, 27, 27, 10, 41,  4, 29,  2,  2, 41, 36, 31,

  1297.     49, 31, 34, 30, 34, 36, 30, 35,  1, 49, 11,  5, 35, 11,  1,  3,

  1298.      3,  5, 37, 37,  8, 40,  8, 40, 12, 12, 42, 42,  1, 38, 16, 57,

  1299.      1,  6, 16, 39, 38,  6,  7,  7, 13, 13, 39, 43,  2, 43, 57,  2,

  1300.     50,  9, 44,  9, 50,  4, 15, 48, 44,  4,  1, 15, 48, 14, 14,  1,

  1301.     45, 45,  8,  3,  5,  8, 51, 47,  3, 46, 46, 47,  5, 51,  1, 17,

  1302.     17, 58,  1, 58,  2, 52, 52,  2, 53,  7, 59,  6,  6, 56, 53, 55,

  1303.      7, 55,  1, 54, 59, 56, 54, 10,  1, 10,  4, 60,  1, 60,  8,  4,

  1304.      8, 64, 64, 61,  1, 63,  3, 63, 62, 61,  5, 11,  5,  3, 11, 62},

  1305. 

  1306.     /* value table */

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

  1308.       2,  -2,   1,  -1,   1,  -1,   4,   1,  -4,  -1,   2,  -2,   1,  -1,   5,   3,

  1309.      -3,  -5,   2,   1,  -2,  -1,   1,  -1,   6,   2,   1,  -1,  -6,  -2,   1,  -1,

  1310.       3,  -3,   2,  -2,   4,  -4,   1,  -1,   1,  -1,   1,   2,  -1,   2,  -2,  -2,

  1311.       7,  -7,   1,  -1,   3,  -3,   8,  -8,   1,  -1,   5,  -5,   3,  -3,   1,   4,

  1312.       2,  -4,  -1,  -2,   1,   1,  -1,  -1,   9,   1,   1,  -9,  -1,   1,  -1,  -1,

  1313.       1,  -1,   3,  -3,   1,   3,  -3,  -1,   3,  -3,   1,  -1,  10,   1, -10,  -1,

  1314.       1,   4,  -1,   2,   1,  -1,   1,  -2,   1,  -4,  -1,   6,  -6,  -1,   1,   1,

  1315.       1,  -1,   1,   1,  -1,  -1,  -1,   1,  11,  -1,  -2,   4,  -1,   2, -11,   5,

  1316.      -5,  -4,  -1,   1,   4,   1,  -4,  -1,  -2,   2,   1,  -1,  12,   1,  -2,   1,

  1317.     -12,   4,   2,   1,  -1,  -4,   4,  -4,   2,  -2,  -1,   1,   7,  -1,  -1,  -7,

  1318.      -1,  -3,   1,   3,   1,   5,   2,   1,  -1,  -5,  13,  -2,  -1,   2,  -2, -13,

  1319.       1,  -1,   5,   6,   5,  -5,   1,   1,  -6,   1,  -1,  -1,  -5,  -1,  14,   2,

  1320.      -2,   1, -14,  -1,   8,   1,  -1,  -8,   1,   5,   1,   5,  -5,   1,  -1,   1,

  1321.      -5,  -1,  15,   1,  -1,  -1,  -1,   3, -15,  -3,   6,   1,  16,  -1,   6,  -6,

  1322.      -6,   1,  -1,   1, -16,   1,   7,  -1,   1,  -1,  -6,  -3,   6,  -7,   3,  -1}

  1323. },{

  1324.     /* MapTab3 */

  1325.     0,  /* eob_sym */

  1326.     35, /* esc_sym */

  1327.     /* run table */

  1328.     {0,  1,  1,  2,  2,  3,  3,  4,  4,  1,  1,  5,  5,  6,  6,  7,

  1329.      7,  8,  8,  9,  9,  2,  2, 10, 10,  1,  1, 11, 11, 12, 12,  3,

  1330.      3, 13, 13,  0, 14, 14, 16, 15, 16, 15,  4,  4, 17,  1, 17,  1,

  1331.      5,  5, 18, 18,  2,  2,  6,  6,  8, 19,  7,  8,  7, 19, 20, 20,

  1332.     21, 21, 22, 24, 22, 24, 23, 23,  1,  1, 25, 25,  3,  3, 26, 26,

  1333.      9,  9, 27, 27, 28, 28, 33, 29,  4, 33, 29,  1,  4,  1, 32, 32,

  1334.      2,  2, 31, 10, 30, 10, 30, 31, 34, 34,  5,  5, 36, 36, 35, 41,

  1335.     35, 11, 41, 11, 37,  1,  8,  8, 37,  6,  1,  6, 40,  7,  7, 40,

  1336.     12, 38, 12, 39, 39, 38, 49, 13, 49, 13,  3, 42,  3, 42, 16, 16,

  1337.     43, 43, 14, 14,  1,  1, 44, 15, 44, 15,  2,  2, 57, 48, 50, 48,

  1338.     57, 50,  4, 45, 45,  4, 46, 47, 47, 46,  1, 51,  1, 17, 17, 51,

  1339.      8,  9,  9,  5, 58,  8, 58,  5, 52, 52, 55, 56, 53, 56, 55, 59,

  1340.     59, 53, 54,  1,  6, 54,  7,  7,  6,  1,  2,  3,  2,  3, 64, 60,

  1341.     60, 10, 10, 64, 61, 62, 61, 63,  1, 63, 62,  1, 18, 24, 18,  4,

  1342.     25,  4,  8, 21, 21,  1, 24, 22, 25, 22,  8, 11, 19, 11, 23,  1,

  1343.     20, 23, 19, 20,  5, 12,  5,  1, 16,  2, 12, 13,  2, 13,  1, 16},

  1344. 

  1345.     /* value table */

  1346.     { 0,   1,  -1,   1,  -1,   1,  -1,   1,  -1,   2,  -2,   1,  -1,   1,  -1,   1,

  1347.      -1,   1,  -1,   1,  -1,   2,  -2,   1,  -1,   3,  -3,   1,  -1,   1,  -1,   2,

  1348.      -2,   1,  -1,   0,   1,  -1,   1,   1,  -1,  -1,   2,  -2,   1,   4,  -1,  -4,

  1349.       2,  -2,   1,  -1,  -3,   3,   2,  -2,   2,   1,   2,  -2,  -2,  -1,   1,  -1,

  1350.       1,  -1,   1,   1,  -1,  -1,   1,  -1,   5,  -5,   1,  -1,   3,  -3,   1,  -1,

  1351.       2,  -2,   1,  -1,   1,  -1,   1,   1,   3,  -1,  -1,   6,  -3,  -6,  -1,   1,

  1352.       4,  -4,   1,   2,   1,  -2,  -1,  -1,   1,  -1,   3,  -3,   1,  -1,   1,   1,

  1353.      -1,   2,  -1,  -2,   1,   7,  -3,   3,  -1,   3,  -7,  -3,   1,  -3,   3,  -1,

  1354.       2,   1,  -2,   1,  -1,  -1,   1,   2,  -1,  -2,  -4,  -1,   4,   1,   2,  -2,

  1355.       1,  -1,  -2,   2,   8,  -8,  -1,   2,   1,  -2,  -5,   5,   1,  -1,  -1,   1,

  1356.      -1,   1,   4,  -1,   1,  -4,  -1,  -1,   1,   1,   9,   1,  -9,   2,  -2,  -1,

  1357.      -4,   3,  -3,  -4,  -1,   4,   1,   4,   1,  -1,   1,  -1,   1,   1,  -1,   1,

  1358.      -1,  -1,  -1,  10,   4,   1,   4,  -4,  -4, -10,   6,   5,  -6,  -5,   1,  -1,

  1359.       1,   3,  -3,  -1,   1,  -1,  -1,  -1,  11,   1,   1, -11,  -2,  -2,   2,   5,

  1360.      -2,  -5,  -5,   2,  -2,  12,   2,  -2,   2,   2,   5,  -3,  -2,   3,  -2, -12,

  1361.      -2,   2,   2,   2,  -5,   3,   5,  13,  -3,   7,  -3,  -3,  -7,   3, -13,   3}

  1362. },{

  1363.     /* MapTab4 */

  1364.     0,  /* eob_sym */

  1365.     34, /* esc_sym */

  1366.     /* run table */

  1367.     {0,  1,  1,  1,  2,  2,  1,  3,  3,  1,  1,  1,  4,  4,  1,  5,

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

  1369.      2,  3,  0,  1,  2,  7,  1,  1,  1,  8,  1,  1,  8,  1,  1,  1,

  1370.      9,  1,  9,  1,  2,  1,  1,  2,  1,  1, 10,  4,  1, 10,  1,  4,

  1371.      1,  1,  1,  1,  1,  3,  1,  1,  1,  3,  2,  1,  5,  1,  1,  1,

  1372.      2,  5,  1, 11,  1, 11,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,

  1373.      2,  1,  6,  1,  6,  1,  1,  2,  1,  1,  1,  1,  1,  1,  1, 12,

  1374.      3,  1, 12,  1,  1,  1,  2,  1,  1,  3,  1,  1,  1,  1,  1,  1,

  1375.      4,  1,  1,  1,  2,  1,  1,  4,  1,  1,  1,  1,  1,  1,  2,  1,

  1376.      1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  3,  1,  2,  1,  1,  5,

  1377.      1,  1,  1,  1,  1,  7,  1,  7,  1,  1,  2,  3,  1,  1,  1,  1,

  1378.      5,  1,  1,  1,  1,  1,  1,  2, 13,  1,  1,  1,  1,  1,  1,  1,

  1379.      1,  1,  1,  1,  1,  1,  1,  1, 13,  2,  1,  1,  4,  1,  1,  1,

  1380.      3,  1,  6,  1,  1,  1, 14,  1,  1,  1,  1,  1, 14,  6,  1,  1,

  1381.      1,  1, 15,  2,  4,  1,  2,  3, 15,  1,  1,  1,  8,  1,  1,  8,

  1382.      1,  1,  1,  1,  1,  1,  1,  1,  2,  1,  1,  1,  1,  1,  1,  1},

  1383. 

  1384.     /* value table */

  1385.     { 0,   1,  -1,   2,   1,  -1,  -2,   1,  -1,   3,  -3,   4,   1,  -1,  -4,   1,

  1386.       2,   5,  -1,  -2,  -5,   6,   1,  -1,  -6,   7,  -7,   8,  -8,   1,   2,   9,

  1387.       3,  -2,   0,  -9,  -3,  -1,  10, -10,  11,   1, -11,  12,  -1, -12,  13, -13,

  1388.       1,  14,  -1, -14,   4,  15, -15,  -4,  16, -16,   1,   2,  17,  -1, -17,  -2,

  1389.      18, -18,  19, -19,  20,   3, -20,  21, -21,  -3,   5,  22,   2, -22, -23,  23,

  1390.      -5,  -2,  24,   1, -24,  -1,  25, -25,  26, -26, -27,  27,  28,  29, -28, -29,

  1391.       6,  30,   2, -31,  -2, -30,  31,  -6, -32,  32,  33, -33,  34, -35, -34,   1,

  1392.       4, -36,  -1,  35,  37,  36,   7, -37,  38,  -4, -38,  39,  41,  40, -40, -39,

  1393.       3,  42, -43, -41,  -7, -42,  43,  -3,  44, -44,  45, -45,  46,  47,   8, -47,

  1394.     -48, -46,  50, -50,  48,  49,  51, -49,  52, -52,   5, -51,  -8, -53,  53,   3,

  1395.     -56,  56,  55,  54, -54,   2,  60,  -2, -55,  58,   9,  -5,  59,  57, -57, -63,

  1396.      -3, -58, -60, -61,  61, -59, -62,  -9,   1,  64,  62,  69, -64,  63,  65, -67,

  1397.     -68,  66, -65,  68, -66, -69,  67, -70,  -1,  10,  71, -71,   4,  73,  72,  70,

  1398.       6, -76,  -3,  74, -78, -74,   1,  78,  80, -72, -75,  76,  -1,   3, -73,  79,

  1399.      75,  77,   1,  11,  -4, -79, -10,  -6,  -1, -77, -83, -80,   2,  81, -84,  -2,

  1400.      83, -81,  82, -82,  84, -87, -86,  85, -11, -85,  86, -89,  87, -88,  88,  89}

  1401. },{

  1402.     /* MapTab5 */

  1403.     2,  /* eob_sym */

  1404.     33, /* esc_sym */

  1405.     /* run table */

  1406.     {1,  1,  0,  2,  1,  2,  1,  3,  3,  1,  1,  4,  4,  2,  2,  1,

  1407.      1,  5,  5,  6,  1,  6,  1,  7,  7,  3,  3,  2,  8,  2,  8,  1,

  1408.      1,  0,  9,  9,  1,  1, 10,  4, 10,  4, 11, 11,  2,  1,  2,  1,

  1409.     12, 12,  3,  3,  1,  1, 13,  5,  5, 13, 14,  1,  1, 14,  2,  2,

  1410.      6,  6, 15,  1,  1, 15, 16,  4,  7, 16,  4,  7,  1,  1,  3,  3,

  1411.      8,  8,  2,  2,  1,  1, 17, 17,  1,  1, 18, 18,  5,  5,  2,  2,

  1412.      1,  1,  9, 19,  9, 19, 20,  3,  3, 20,  1, 10, 21,  1, 10,  4,

  1413.      4, 21, 22,  6,  6, 22,  1,  1, 23, 24,  2,  2, 23, 24, 11,  1,

  1414.      1, 11,  7, 25,  7,  1,  1, 25,  8,  8,  3, 26,  3,  1, 12,  2,

  1415.      2, 26,  1, 12,  5,  5, 27,  4,  1,  4,  1, 27, 28,  1, 28, 13,

  1416.      1, 13,  2, 29,  2,  1, 32,  6,  1, 30, 14, 29, 14,  6,  3, 31,

  1417.      3,  1, 30,  1, 32, 31, 33,  9, 33,  1,  1,  7,  9,  7,  2,  2,

  1418.      1,  1,  4, 36, 34,  4,  5, 10, 10,  5, 34,  1,  1, 35,  8,  8,

  1419.     36,  3, 35,  1, 15,  3,  2,  1, 16, 15, 16,  2, 37,  1, 37,  1,

  1420.      1,  1,  6,  6, 38,  1, 38, 11,  1, 39, 39, 40, 11,  2, 41,  4,

  1421.     40,  1,  2,  4,  1,  1,  1, 41,  3,  1,  3,  1,  5,  7,  5,  7},

  1422. 

  1423.     /* value table */

  1424.     { 1,  -1,   0,   1,   2,  -1,  -2,   1,  -1,   3,  -3,   1,  -1,   2,  -2,   4,

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

  1426.      -6,   0,   1,  -1,   7,  -7,   1,   2,  -1,  -2,   1,  -1,   4,   8,  -4,  -8,

  1427.       1,  -1,   3,  -3,   9,  -9,   1,   2,  -2,  -1,   1,  10, -10,  -1,   5,  -5,

  1428.       2,  -2,   1,  11, -11,  -1,   1,   3,   2,  -1,  -3,  -2,  12, -12,   4,  -4,

  1429.       2,  -2,  -6,   6,  13, -13,   1,  -1,  14, -14,   1,  -1,   3,  -3,   7,  -7,

  1430.      15, -15,   2,   1,  -2,  -1,   1,   5,  -5,  -1, -16,   2,   1,  16,  -2,   4,

  1431.      -4,  -1,   1,   3,  -3,  -1,  17, -17,   1,   1,  -8,   8,  -1,  -1,   2,  18,

  1432.     -18,  -2,   3,   1,  -3,  19, -19,  -1,   3,  -3,   6,   1,  -6,  20,   2,   9,

  1433.      -9,  -1, -20,  -2,   4,  -4,   1,  -5,  21,   5, -21,  -1,   1, -22,  -1,   2,

  1434.      22,  -2,  10,   1, -10,  23,   1,   4, -23,   1,   2,  -1,  -2,  -4,  -7,   1,

  1435.       7, -24,  -1,  24,  -1,  -1,   1,   3,  -1, -25,  25,   4,  -3,  -4,  11, -11,

  1436.      26, -26,   6,   1,   1,  -6,  -5,  -3,   3,   5,  -1, -27,  27,   1,   4,  -4,

  1437.      -1,  -8,  -1,  28,   2,   8, -12, -28,  -2,  -2,   2,  12,  -1,  29,   1, -29,

  1438.      30, -30,   5,  -5,   1, -31,  -1,   3,  31,  -1,   1,   1,  -3, -13,   1,  -7,

  1439.      -1, -32,  13,   7,  32,  33, -33,  -1,  -9, -34,   9,  34,  -6,   5,   6,  -5}

  1440. },{

  1441.     /* MapTab6 */

  1442.     2,  /* eob_sym */

  1443.     13, /* esc_sym */

  1444.     /* run table */

  1445.     {1,  1,  0,  1,  1,  2,  2,  1,  1,  3,  3,  1,  1,  0,  2,  2,

  1446.      4,  1,  4,  1,  1,  1,  5,  5,  1,  1,  6,  6,  2,  2,  1,  1,

  1447.      3,  3,  7,  7,  1,  1,  8,  8,  1,  1,  2,  2,  1,  9,  1,  9,

  1448.      4,  4, 10,  1,  1, 10,  1,  1, 11, 11,  3,  3,  1,  2,  1,  2,

  1449.      1,  1, 12, 12,  5,  5,  1,  1, 13,  1,  1, 13,  2,  2,  1,  1,

  1450.      6,  6,  1,  1,  4, 14,  4, 14,  3,  1,  3,  1,  1,  1, 15,  7,

  1451.     15,  2,  2,  7,  1,  1,  1,  8,  1,  8, 16, 16,  1,  1,  1,  1,

  1452.      2,  1,  1,  2,  1,  1,  3,  5,  5,  3,  4,  1,  1,  4,  1,  1,

  1453.     17, 17,  9,  1,  1,  9,  2,  2,  1,  1, 10, 10,  1,  6,  1,  1,

  1454.      6, 18,  1,  1, 18,  1,  1,  1,  2,  2,  3,  1,  3,  1,  1,  1,

  1455.      4,  1, 19,  1, 19,  7,  1,  1, 20,  1,  4, 20,  1,  7, 11,  2,

  1456.      1, 11, 21,  2,  8,  5,  1,  8,  1,  5, 21,  1,  1,  1, 22,  1,

  1457.      1, 22,  1,  1,  3,  3,  1, 23,  2, 12, 24,  1,  1,  2,  1,  1,

  1458.     12, 23,  1,  1, 24,  1,  1,  1,  4,  1,  1,  1,  2,  1,  6,  6,

  1459.      4,  2,  1,  1,  1,  1,  1,  1,  1, 14, 13,  3,  1, 25,  9, 25,

  1460.     14,  1,  9,  3, 13,  1,  1,  1,  1,  1, 10,  1,  1,  2, 10,  2},

  1461. 

  1462.     /* value table */

  1463.     {-20,  -1,   0,   2,  -2,   1,  -1,   3,  -3,   1,  -1,   4,  -4,   0,   2,  -2,

  1464.        1,   5,  -1,  -5,   6,  -6,   1,  -1,   7,  -7,   1,  -1,   3,  -3,   8,  -8,

  1465.        2,  -2,   1,  -1,   9,  -9,   1,  -1,  10, -10,   4,  -4,  11,   1, -11,  -1,

  1466.        2,  -2,   1,  12, -12,  -1,  13, -13,   1,  -1,   3,  -3,  14,   5, -14,  -5,

  1467.      -15,  15,  -1,   1,   2,  -2,  16, -16,   1,  17, -17,  -1,   6,  -6,  18, -18,

  1468.        2,  -2, -19,  19,  -3,   1,   3,  -1,   4,  20,  -4,   1, -21,  21,   1,   2,

  1469.       -1,  -7,   7,  -2,  22, -22,  23,   2, -23,  -2,   1,  -1, -24,  24, -25,  25,

  1470.       -8, -26,  26,   8, -27,  27,   5,   3,  -3,  -5,  -4,  28, -28,   4,  29, -29,

  1471.        1,  -1,  -2, -30,  30,   2,   9,  -9, -31,  31,   2,  -2, -32,   3,  32, -33,

  1472.       -3,   1,  33, -34,  -1,  34, -35,  35, -10,  10,  -6,  36,   6, -36,  37, -37,

  1473.       -5,  38,   1, -38,  -1,   3,  39, -39,  -1,  40,   5,   1, -40,  -3,   2, -11,

  1474.      -41,  -2,   1,  11,  -3,  -4,  41,   3,  42,   4,  -1, -43, -42,  43,   1, -44,

  1475.       45,  -1,  44, -45,  -7,   7, -46,   1, -12,   2,   1, -47,  46,  12,  47,  48,

  1476.       -2,  -1, -48,  49,  -1, -50, -49,  50,  -6, -51,  51,  52, -13,  53,  -4,   4,

  1477.        6,  13, -53, -52, -54,  55,  54, -55, -56,  -2,   2,  -8,  56,   1,  -3,  -1,

  1478.        2,  58,   3,   8,  -2,  57, -58, -60, -59, -57,  -3,  60,  59, -14,   3,  14}

  1479. },{

  1480.     /* MapTab7 */

  1481.     2,  /* eob_sym */

  1482.     38, /* esc_sym */

  1483.     /* run table */

  1484.     {1,  1,  0,  2,  2,  1,  1,  3,  3,  4,  4,  5,  5,  1,  1,  6,

  1485.      6,  2,  2,  7,  7,  8,  8,  1,  1,  3,  3,  9,  9, 10, 10,  1,

  1486.      1,  2,  2,  4,  4, 11,  0, 11, 12, 12, 13, 13,  1,  1,  5,  5,

  1487.     14, 14, 15, 16, 15, 16,  3,  3,  1,  6,  1,  6,  2,  2,  7,  7,

  1488.      8,  8, 17, 17,  1,  1,  4,  4, 18, 18,  2,  2,  1, 19,  1, 20,

  1489.     19, 20, 21, 21,  3,  3, 22, 22,  5,  5, 24,  1,  1, 23,  9, 23,

  1490.     24,  9,  2,  2, 10,  1,  1, 10,  6,  6, 25,  4,  4, 25,  7,  7,

  1491.     26,  8,  1,  8,  3,  1, 26,  3, 11, 11, 27, 27,  2, 28,  1,  2,

  1492.     28,  1, 12, 12,  5,  5, 29, 13, 13, 29, 32,  1,  1, 33, 31, 30,

  1493.     32,  4, 30, 33,  4, 31,  3, 14,  1,  1,  3, 34, 34,  2,  2, 14,

  1494.      6,  6, 35, 36, 35, 36,  1, 15,  1, 16, 16, 15,  7,  9,  7,  9,

  1495.     37,  8,  8, 37,  1,  1, 39,  2, 38, 39,  2, 40,  5, 38, 40,  5,

  1496.      3,  3,  4,  4, 10, 10,  1,  1,  1,  1, 41,  2, 41,  2,  6,  6,

  1497.      1,  1, 11, 42, 11, 43,  3, 42,  3, 17,  4, 43,  1, 17,  7,  1,

  1498.      8, 44,  4,  7, 44,  5,  8,  2,  5,  1,  2, 48, 45,  1, 12, 45,

  1499.     12, 48, 13, 13,  1,  9,  9, 46,  1, 46, 47, 47, 49, 18, 18, 49},

  1500. 

  1501.     /* value table */

  1502.     { 1,  -1,   0,   1,  -1,   2,  -2,   1,  -1,   1,  -1,   1,  -1,   3,  -3,   1,

  1503.      -1,  -2,   2,   1,  -1,   1,  -1,   4,  -4,  -2,   2,   1,  -1,   1,  -1,   5,

  1504.      -5,  -3,   3,   2,  -2,   1,   0,  -1,   1,  -1,   1,  -1,   6,  -6,   2,  -2,

  1505.       1,  -1,   1,   1,  -1,  -1,  -3,   3,   7,   2,  -7,  -2,  -4,   4,   2,  -2,

  1506.       2,  -2,   1,  -1,   8,  -8,   3,  -3,   1,  -1,  -5,   5,   9,   1,  -9,   1,

  1507.      -1,  -1,   1,  -1,  -4,   4,   1,  -1,   3,  -3,   1, -10,  10,   1,   2,  -1,

  1508.      -1,  -2,   6,  -6,   2,  11, -11,  -2,   3,  -3,   1,  -4,   4,  -1,   3,  -3,

  1509.       1,   3,  12,  -3,  -5, -12,  -1,   5,   2,  -2,   1,  -1,  -7,   1,  13,   7,

  1510.      -1, -13,   2,  -2,   4,  -4,   1,   2,  -2,  -1,   1,  14, -14,   1,   1,   1,

  1511.      -1,  -5,  -1,  -1,   5,  -1,  -6,   2, -15,  15,   6,   1,  -1,  -8,   8,  -2,

  1512.      -4,   4,   1,   1,  -1,  -1,  16,   2, -16,  -2,   2,  -2,   4,   3,  -4,  -3,

  1513.      -1,  -4,   4,   1, -17,  17,  -1,  -9,   1,   1,   9,   1,  -5,  -1,  -1,   5,

  1514.      -7,   7,   6,  -6,   3,  -3,  18, -18,  19, -19,   1, -10,  -1,  10,  -5,   5,

  1515.      20, -20,  -3,   1,   3,   1,   8,  -1,  -8,   2,   7,  -1, -21,  -2,   5,  21,

  1516.       5,  -1,  -7,  -5,   1,  -6,  -5, -11,   6,  22,  11,   1,   1, -22,  -3,  -1,

  1517.       3,  -1,   3,  -3, -23,   4,  -4,   1,  23,  -1,   1,  -1,   1,  -2,   2,  -1}

  1518. },{

  1519.     /* MapTab8 */

  1520.     4,  /* eob_sym */

  1521.     11, /* esc_sym */

  1522.     /* run table */

  1523.     {1,  1,  1,  1,  0,  2,  2,  1,  1,  3,  3,  0,  1,  1,  2,  2,

  1524.      4,  4,  1,  1,  5,  5,  1,  1,  2,  2,  3,  3,  6,  6,  1,  1,

  1525.      7,  7,  8,  1,  8,  2,  2,  1,  4,  4,  1,  3,  1,  3,  9,  9,

  1526.      2,  2,  1,  5,  1,  5, 10, 10,  1,  1, 11, 11,  3,  6,  3,  4,

  1527.      4,  6,  2,  2,  1, 12,  1, 12,  7, 13,  7, 13,  1,  1,  8,  8,

  1528.      2,  2, 14, 14, 16, 15, 16,  5,  5,  1,  3, 15,  1,  3,  4,  4,

  1529.      1,  1, 17, 17,  2,  2,  6,  6,  1, 18,  1, 18, 22, 21, 22, 21,

  1530.     25, 24, 25, 19,  9, 20,  9, 23, 19, 24, 20,  3, 23,  7,  3,  1,

  1531.      1,  7, 28, 26, 29,  5, 28, 26,  5,  8, 29,  4,  8, 27,  2,  2,

  1532.      4, 27,  1,  1, 10, 36, 10, 33, 33, 36, 30,  1, 32, 32,  1, 30,

  1533.      6, 31, 31, 35,  3,  6, 11, 11,  3,  2, 35,  2, 34,  1, 34,  1,

  1534.     37, 37, 12,  7, 12,  5, 41,  5,  4,  7,  1,  8, 13,  4,  1, 41,

  1535.     13, 38,  8, 38,  9,  1, 40, 40,  9,  1, 39,  2,  2, 49, 39, 42,

  1536.      3,  3, 14, 16, 49, 14, 16, 42, 43, 43,  6,  6, 15,  1,  1, 15,

  1537.     44, 44,  1,  1, 50, 48,  4,  5,  4,  7,  5,  2, 10, 10, 48,  7,

  1538.     50, 45,  2,  1, 45,  8,  8,  1, 46, 46,  3, 47, 47,  3,  1,  1},

  1539. 

  1540.     /* value table */

  1541.     { 1,  -1,   2,  -2,   0,   1,  -1,   3,  -3,   1,  -1,   0,   4,  -4,   2,  -2,

  1542.       1,  -1,   5,  -5,   1,  -1,   6,  -6,   3,  -3,   2,  -2,   1,  -1,   7,  -7,

  1543.       1,  -1,   1,   8,  -1,   4,  -4,  -8,   2,  -2,   9,   3,  -9,  -3,   1,  -1,

  1544.       5,  -5,  10,   2, -10,  -2,   1,  -1,  11, -11,   1,  -1,  -4,   2,   4,   3,

  1545.      -3,  -2,   6,  -6,  12,   1, -12,  -1,   2,   1,  -2,  -1,  13, -13,   2,  -2,

  1546.       7,  -7,   1,  -1,   1,   1,  -1,   3,  -3,  14,   5,  -1, -14,  -5,   4,  -4,

  1547.      15, -15,   1,  -1,   8,  -8,  -3,   3,  16,   1, -16,  -1,   1,   1,  -1,  -1,

  1548.       1,   1,  -1,   1,   2,   1,  -2,   1,  -1,  -1,  -1,   6,  -1,   3,  -6,  17,

  1549.     -17,  -3,   1,   1,   1,   4,  -1,  -1,  -4,   3,  -1,   5,  -3,  -1,  -9,   9,

  1550.      -5,   1,  18, -18,   2,   1,  -2,   1,  -1,  -1,   1,  19,  -1,   1, -19,  -1,

  1551.       4,   1,  -1,   1,   7,  -4,  -2,   2,  -7,  10,  -1, -10,   1,  20,  -1, -20,

  1552.       1,  -1,   2,   4,  -2,   5,   1,  -5,   6,  -4,  21,   4,   2,  -6, -21,  -1,

  1553.      -2,   1,  -4,  -1,  -3,  22,  -1,   1,   3, -22,  -1,  11, -11,   1,   1,   1,

  1554.       8,  -8,   2,   2,  -1,  -2,  -2,  -1,   1,  -1,  -5,   5,   2,  23, -23,  -2,

  1555.       1,  -1,  24, -24,  -1,  -1,   7,   6,  -7,   5,  -6,  12,  -3,   3,   1,  -5,

  1556.       1,   1, -12,  25,  -1,  -5,   5, -25,  -1,   1,   9,   1,  -1,  -9,  26, -26}

  1557. }

  1558. };