/* * common functions for Indeo Video Interactive codecs (Indeo4 and Indeo5) * * Copyright (c) 2009 Maxim Poliakovski * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * @file * This file contains functions and data shared by both Indeo4 and * Indeo5 decoders. */ #include <inttypes.h> #include "libavutil/attributes.h" #include "libavutil/imgutils.h" #include "libavutil/timer.h" #define BITSTREAM_READER_LE #include "avcodec.h" #include "get_bits.h" #include "internal.h" #include "mathops.h" #include "ivi.h" #include "ivi_dsp.h" /** * These are 2x8 predefined Huffman codebooks for coding macroblock/block * signals. They are specified using "huffman descriptors" in order to * avoid huge static tables. The decoding tables will be generated at * startup from these descriptors. */ /** static macroblock huffman tables */ static const IVIHuffDesc ivi_mb_huff_desc[8] = { {8, {0, 4, 5, 4, 4, 4, 6, 6}}, {12, {0, 2, 2, 3, 3, 3, 3, 5, 3, 2, 2, 2}}, {12, {0, 2, 3, 4, 3, 3, 3, 3, 4, 3, 2, 2}}, {12, {0, 3, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2}}, {13, {0, 4, 4, 3, 3, 3, 3, 2, 3, 3, 2, 1, 1}}, {9, {0, 4, 4, 4, 4, 3, 3, 3, 2}}, {10, {0, 4, 4, 4, 4, 3, 3, 2, 2, 2}}, {12, {0, 4, 4, 4, 3, 3, 2, 3, 2, 2, 2, 2}} }; /** static block huffman tables */ static const IVIHuffDesc ivi_blk_huff_desc[8] = { {10, {1, 2, 3, 4, 4, 7, 5, 5, 4, 1}}, {11, {2, 3, 4, 4, 4, 7, 5, 4, 3, 3, 2}}, {12, {2, 4, 5, 5, 5, 5, 6, 4, 4, 3, 1, 1}}, {13, {3, 3, 4, 4, 5, 6, 6, 4, 4, 3, 2, 1, 1}}, {11, {3, 4, 4, 5, 5, 5, 6, 5, 4, 2, 2}}, {13, {3, 4, 5, 5, 5, 5, 6, 4, 3, 3, 2, 1, 1}}, {13, {3, 4, 5, 5, 5, 6, 5, 4, 3, 3, 2, 1, 1}}, {9, {3, 4, 4, 5, 5, 5, 6, 5, 5}} }; static VLC ivi_mb_vlc_tabs [8]; ///< static macroblock Huffman tables static VLC ivi_blk_vlc_tabs[8]; ///< static block Huffman tables typedef void (*ivi_mc_func) (int16_t *buf, const int16_t *ref_buf, uint32_t pitch, int mc_type); typedef void (*ivi_mc_avg_func) (int16_t *buf, const int16_t *ref_buf1, const int16_t *ref_buf2, uint32_t pitch, int mc_type, int mc_type2); static int ivi_mc(IVIBandDesc *band, ivi_mc_func mc, ivi_mc_avg_func mc_avg, int offs, int mv_x, int mv_y, int mv_x2, int mv_y2, int mc_type, int mc_type2) { int ref_offs = offs + mv_y * band->pitch + mv_x; int buf_size = band->pitch * band->aheight; int min_size = band->pitch * (band->blk_size - 1) + band->blk_size; int ref_size = (mc_type > 1) * band->pitch + (mc_type & 1); if (mc_type != -1) { av_assert0(offs >= 0 && ref_offs >= 0 && band->ref_buf); av_assert0(buf_size - min_size >= offs); av_assert0(buf_size - min_size - ref_size >= ref_offs); } if (mc_type2 == -1) { mc(band->buf + offs, band->ref_buf + ref_offs, band->pitch, mc_type); } else { int ref_offs2 = offs + mv_y2 * band->pitch + mv_x2; int ref_size2 = (mc_type2 > 1) * band->pitch + (mc_type2 & 1); if (offs < 0 || ref_offs2 < 0 || !band->b_ref_buf) return AVERROR_INVALIDDATA; if (buf_size - min_size - ref_size2 < ref_offs2) return AVERROR_INVALIDDATA; if (mc_type == -1) mc(band->buf + offs, band->b_ref_buf + ref_offs2, band->pitch, mc_type2); else mc_avg(band->buf + offs, band->ref_buf + ref_offs, band->b_ref_buf + ref_offs2, band->pitch, mc_type, mc_type2); } return 0; } /** * Reverse "nbits" bits of the value "val" and return the result * in the least significant bits. */ static uint16_t inv_bits(uint16_t val, int nbits) { uint16_t res; if (nbits <= 8) { res = ff_reverse[val] >> (8 - nbits); } else res = ((ff_reverse[val & 0xFF] << 8) + (ff_reverse[val >> 8])) >> (16 - nbits); return res; } /* * Generate a huffman codebook from the given descriptor * and convert it into the FFmpeg VLC table. * * @param[in] cb pointer to codebook descriptor * @param[out] vlc where to place the generated VLC table * @param[in] flag flag: 1 - for static or 0 for dynamic tables * @return result code: 0 - OK, -1 = error (invalid codebook descriptor) */ static int ivi_create_huff_from_desc(const IVIHuffDesc *cb, VLC *vlc, int flag) { int pos, i, j, codes_per_row, prefix, not_last_row; uint16_t codewords[256]; /* FIXME: move this temporal storage out? */ uint8_t bits[256]; pos = 0; /* current position = 0 */ for (i = 0; i < cb->num_rows; i++) { codes_per_row = 1 << cb->xbits[i]; not_last_row = (i != cb->num_rows - 1); prefix = ((1 << i) - 1) << (cb->xbits[i] + not_last_row); for (j = 0; j < codes_per_row; j++) { if (pos >= 256) /* Some Indeo5 codebooks can have more than 256 */ break; /* elements, but only 256 codes are allowed! */ bits[pos] = i + cb->xbits[i] + not_last_row; if (bits[pos] > IVI_VLC_BITS) return AVERROR_INVALIDDATA; /* invalid descriptor */ codewords[pos] = inv_bits((prefix | j), bits[pos]); if (!bits[pos]) bits[pos] = 1; pos++; }//for j }//for i /* number of codewords = pos */ return init_vlc(vlc, IVI_VLC_BITS, pos, bits, 1, 1, codewords, 2, 2, (flag ? INIT_VLC_USE_NEW_STATIC : 0) | INIT_VLC_LE); } av_cold void ff_ivi_init_static_vlc(void) { int i; static VLC_TYPE table_data[8192 * 16][2]; static int initialized_vlcs = 0; if (initialized_vlcs) return; for (i = 0; i < 8; i++) { ivi_mb_vlc_tabs[i].table = table_data + i * 2 * 8192; ivi_mb_vlc_tabs[i].table_allocated = 8192; ivi_create_huff_from_desc(&ivi_mb_huff_desc[i], &ivi_mb_vlc_tabs[i], 1); ivi_blk_vlc_tabs[i].table = table_data + (i * 2 + 1) * 8192; ivi_blk_vlc_tabs[i].table_allocated = 8192; ivi_create_huff_from_desc(&ivi_blk_huff_desc[i], &ivi_blk_vlc_tabs[i], 1); } initialized_vlcs = 1; } /* * Copy huffman codebook descriptors. * * @param[out] dst ptr to the destination descriptor * @param[in] src ptr to the source descriptor */ static void ivi_huff_desc_copy(IVIHuffDesc *dst, const IVIHuffDesc *src) { dst->num_rows = src->num_rows; memcpy(dst->xbits, src->xbits, src->num_rows); } /* * Compare two huffman codebook descriptors. * * @param[in] desc1 ptr to the 1st descriptor to compare * @param[in] desc2 ptr to the 2nd descriptor to compare * @return comparison result: 0 - equal, 1 - not equal */ static int ivi_huff_desc_cmp(const IVIHuffDesc *desc1, const IVIHuffDesc *desc2) { return desc1->num_rows != desc2->num_rows || memcmp(desc1->xbits, desc2->xbits, desc1->num_rows); } int ff_ivi_dec_huff_desc(GetBitContext *gb, int desc_coded, int which_tab, IVIHuffTab *huff_tab, AVCodecContext *avctx) { int i, result; IVIHuffDesc new_huff; if (!desc_coded) { /* select default table */ huff_tab->tab = (which_tab) ? &ivi_blk_vlc_tabs[7] : &ivi_mb_vlc_tabs [7]; return 0; } huff_tab->tab_sel = get_bits(gb, 3); if (huff_tab->tab_sel == 7) { /* custom huffman table (explicitly encoded) */ new_huff.num_rows = get_bits(gb, 4); if (!new_huff.num_rows) { av_log(avctx, AV_LOG_ERROR, "Empty custom Huffman table!\n"); return AVERROR_INVALIDDATA; } for (i = 0; i < new_huff.num_rows; i++) new_huff.xbits[i] = get_bits(gb, 4); /* Have we got the same custom table? Rebuild if not. */ if (ivi_huff_desc_cmp(&new_huff, &huff_tab->cust_desc) || !huff_tab->cust_tab.table) { ivi_huff_desc_copy(&huff_tab->cust_desc, &new_huff); if (huff_tab->cust_tab.table) ff_free_vlc(&huff_tab->cust_tab); result = ivi_create_huff_from_desc(&huff_tab->cust_desc, &huff_tab->cust_tab, 0); if (result) { // reset faulty description huff_tab->cust_desc.num_rows = 0; av_log(avctx, AV_LOG_ERROR, "Error while initializing custom vlc table!\n"); return result; } } huff_tab->tab = &huff_tab->cust_tab; } else { /* select one of predefined tables */ huff_tab->tab = (which_tab) ? &ivi_blk_vlc_tabs[huff_tab->tab_sel] : &ivi_mb_vlc_tabs [huff_tab->tab_sel]; } return 0; } /* * Free planes, bands and macroblocks buffers. * * @param[in] planes pointer to the array of the plane descriptors */ static av_cold void ivi_free_buffers(IVIPlaneDesc *planes) { int p, b, t; for (p = 0; p < 3; p++) { if (planes[p].bands) for (b = 0; b < planes[p].num_bands; b++) { av_freep(&planes[p].bands[b].bufs[0]); av_freep(&planes[p].bands[b].bufs[1]); av_freep(&planes[p].bands[b].bufs[2]); av_freep(&planes[p].bands[b].bufs[3]); if (planes[p].bands[b].blk_vlc.cust_tab.table) ff_free_vlc(&planes[p].bands[b].blk_vlc.cust_tab); for (t = 0; t < planes[p].bands[b].num_tiles; t++) av_freep(&planes[p].bands[b].tiles[t].mbs); av_freep(&planes[p].bands[b].tiles); } av_freep(&planes[p].bands); planes[p].num_bands = 0; } } av_cold int ff_ivi_init_planes(IVIPlaneDesc *planes, const IVIPicConfig *cfg, int is_indeo4) { int p, b; uint32_t b_width, b_height, align_fac, width_aligned, height_aligned, buf_size; IVIBandDesc *band; ivi_free_buffers(planes); if (av_image_check_size(cfg->pic_width, cfg->pic_height, 0, NULL) < 0 || cfg->luma_bands < 1 || cfg->chroma_bands < 1) return AVERROR_INVALIDDATA; /* fill in the descriptor of the luminance plane */ planes[0].width = cfg->pic_width; planes[0].height = cfg->pic_height; planes[0].num_bands = cfg->luma_bands; /* fill in the descriptors of the chrominance planes */ planes[1].width = planes[2].width = (cfg->pic_width + 3) >> 2; planes[1].height = planes[2].height = (cfg->pic_height + 3) >> 2; planes[1].num_bands = planes[2].num_bands = cfg->chroma_bands; for (p = 0; p < 3; p++) { planes[p].bands = av_mallocz_array(planes[p].num_bands, sizeof(IVIBandDesc)); if (!planes[p].bands) return AVERROR(ENOMEM); /* select band dimensions: if there is only one band then it * has the full size, if there are several bands each of them * has only half size */ b_width = planes[p].num_bands == 1 ? planes[p].width : (planes[p].width + 1) >> 1; b_height = planes[p].num_bands == 1 ? planes[p].height : (planes[p].height + 1) >> 1; /* luma band buffers will be aligned on 16x16 (max macroblock size) */ /* chroma band buffers will be aligned on 8x8 (max macroblock size) */ align_fac = p ? 8 : 16; width_aligned = FFALIGN(b_width , align_fac); height_aligned = FFALIGN(b_height, align_fac); buf_size = width_aligned * height_aligned * sizeof(int16_t); for (b = 0; b < planes[p].num_bands; b++) { band = &planes[p].bands[b]; /* select appropriate plane/band */ band->plane = p; band->band_num = b; band->width = b_width; band->height = b_height; band->pitch = width_aligned; band->aheight = height_aligned; band->bufs[0] = av_mallocz(buf_size); band->bufs[1] = av_mallocz(buf_size); band->bufsize = buf_size/2; if (!band->bufs[0] || !band->bufs[1]) return AVERROR(ENOMEM); /* allocate the 3rd band buffer for scalability mode */ if (cfg->luma_bands > 1) { band->bufs[2] = av_mallocz(buf_size); if (!band->bufs[2]) return AVERROR(ENOMEM); } if (is_indeo4) { band->bufs[3] = av_mallocz(buf_size); if (!band->bufs[3]) return AVERROR(ENOMEM); } /* reset custom vlc */ planes[p].bands[0].blk_vlc.cust_desc.num_rows = 0; } } return 0; } static int ivi_init_tiles(IVIBandDesc *band, IVITile *ref_tile, int p, int b, int t_height, int t_width) { int x, y; IVITile *tile = band->tiles; for (y = 0; y < band->height; y += t_height) { for (x = 0; x < band->width; x += t_width) { tile->xpos = x; tile->ypos = y; tile->mb_size = band->mb_size; tile->width = FFMIN(band->width - x, t_width); tile->height = FFMIN(band->height - y, t_height); tile->is_empty = tile->data_size = 0; /* calculate number of macroblocks */ tile->num_MBs = IVI_MBs_PER_TILE(tile->width, tile->height, band->mb_size); av_freep(&tile->mbs); tile->mbs = av_mallocz_array(tile->num_MBs, sizeof(IVIMbInfo)); if (!tile->mbs) return AVERROR(ENOMEM); tile->ref_mbs = 0; if (p || b) { if (tile->num_MBs != ref_tile->num_MBs) { av_log(NULL, AV_LOG_DEBUG, "ref_tile mismatch\n"); return AVERROR_INVALIDDATA; } tile->ref_mbs = ref_tile->mbs; ref_tile++; } tile++; } } return 0; } av_cold int ff_ivi_init_tiles(IVIPlaneDesc *planes, int tile_width, int tile_height) { int p, b, x_tiles, y_tiles, t_width, t_height, ret; IVIBandDesc *band; for (p = 0; p < 3; p++) { t_width = !p ? tile_width : (tile_width + 3) >> 2; t_height = !p ? tile_height : (tile_height + 3) >> 2; if (!p && planes[0].num_bands == 4) { t_width >>= 1; t_height >>= 1; } if(t_width<=0 || t_height<=0) return AVERROR(EINVAL); for (b = 0; b < planes[p].num_bands; b++) { band = &planes[p].bands[b]; x_tiles = IVI_NUM_TILES(band->width, t_width); y_tiles = IVI_NUM_TILES(band->height, t_height); band->num_tiles = x_tiles * y_tiles; av_freep(&band->tiles); band->tiles = av_mallocz_array(band->num_tiles, sizeof(IVITile)); if (!band->tiles) return AVERROR(ENOMEM); /* use the first luma band as reference for motion vectors * and quant */ ret = ivi_init_tiles(band, planes[0].bands[0].tiles, p, b, t_height, t_width); if (ret < 0) return ret; } } return 0; } /* * Decode size of the tile data. * The size is stored as a variable-length field having the following format: * if (tile_data_size < 255) than this field is only one byte long * if (tile_data_size >= 255) than this field four is byte long: 0xFF X1 X2 X3 * where X1-X3 is size of the tile data * * @param[in,out] gb the GetBit context * @return size of the tile data in bytes */ static int ivi_dec_tile_data_size(GetBitContext *gb) { int len; len = 0; if (get_bits1(gb)) { len = get_bits(gb, 8); if (len == 255) len = get_bits_long(gb, 24); } /* align the bitstream reader on the byte boundary */ align_get_bits(gb); return len; } static int ivi_dc_transform(IVIBandDesc *band, int *prev_dc, int buf_offs, int blk_size) { int buf_size = band->pitch * band->aheight - buf_offs; int min_size = (blk_size - 1) * band->pitch + blk_size; if (min_size > buf_size) return AVERROR_INVALIDDATA; band->dc_transform(prev_dc, band->buf + buf_offs, band->pitch, blk_size); return 0; } static int ivi_decode_coded_blocks(GetBitContext *gb, IVIBandDesc *band, ivi_mc_func mc, ivi_mc_avg_func mc_avg, int mv_x, int mv_y, int mv_x2, int mv_y2, int *prev_dc, int is_intra, int mc_type, int mc_type2, uint32_t quant, int offs, AVCodecContext *avctx) { const uint16_t *base_tab = is_intra ? band->intra_base : band->inter_base; RVMapDesc *rvmap = band->rv_map; uint8_t col_flags[8]; int32_t trvec[64]; uint32_t sym = 0, lo, hi, q; int pos, run, val; int blk_size = band->blk_size; int num_coeffs = blk_size * blk_size; int col_mask = blk_size - 1; int scan_pos = -1; int min_size = band->pitch * (band->transform_size - 1) + band->transform_size; int buf_size = band->pitch * band->aheight - offs; if (min_size > buf_size) return AVERROR_INVALIDDATA; if (!band->scan) { av_log(avctx, AV_LOG_ERROR, "Scan pattern is not set.\n"); return AVERROR_INVALIDDATA; } /* zero transform vector */ memset(trvec, 0, num_coeffs * sizeof(trvec[0])); /* zero column flags */ memset(col_flags, 0, sizeof(col_flags)); while (scan_pos <= num_coeffs) { sym = get_vlc2(gb, band->blk_vlc.tab->table, IVI_VLC_BITS, 1); if (sym == rvmap->eob_sym) break; /* End of block */ /* Escape - run/val explicitly coded using 3 vlc codes */ if (sym == rvmap->esc_sym) { run = get_vlc2(gb, band->blk_vlc.tab->table, IVI_VLC_BITS, 1) + 1; lo = get_vlc2(gb, band->blk_vlc.tab->table, IVI_VLC_BITS, 1); hi = get_vlc2(gb, band->blk_vlc.tab->table, IVI_VLC_BITS, 1); /* merge them and convert into signed val */ val = IVI_TOSIGNED((hi << 6) | lo); } else { if (sym >= 256U) { av_log(avctx, AV_LOG_ERROR, "Invalid sym encountered: %"PRIu32".\n", sym); return AVERROR_INVALIDDATA; } run = rvmap->runtab[sym]; val = rvmap->valtab[sym]; } /* de-zigzag and dequantize */ scan_pos += run; if (scan_pos >= num_coeffs || scan_pos < 0) break; pos = band->scan[scan_pos]; if (!val) ff_dlog(avctx, "Val = 0 encountered!\n"); q = (base_tab[pos] * quant) >> 9; if (q > 1) val = val * q + FFSIGN(val) * (((q ^ 1) - 1) >> 1); trvec[pos] = val; /* track columns containing non-zero coeffs */ col_flags[pos & col_mask] |= !!val; } if (scan_pos < 0 || scan_pos >= num_coeffs && sym != rvmap->eob_sym) return AVERROR_INVALIDDATA; /* corrupt block data */ /* undoing DC coeff prediction for intra-blocks */ if (is_intra && band->is_2d_trans) { *prev_dc += trvec[0]; trvec[0] = *prev_dc; col_flags[0] |= !!*prev_dc; } if(band->transform_size > band->blk_size){ av_log(NULL, AV_LOG_ERROR, "Too large transform\n"); return AVERROR_INVALIDDATA; } /* apply inverse transform */ band->inv_transform(trvec, band->buf + offs, band->pitch, col_flags); /* apply motion compensation */ if (!is_intra) return ivi_mc(band, mc, mc_avg, offs, mv_x, mv_y, mv_x2, mv_y2, mc_type, mc_type2); return 0; } /* * Decode block data: * extract huffman-coded transform coefficients from the bitstream, * dequantize them, apply inverse transform and motion compensation * in order to reconstruct the picture. * * @param[in,out] gb the GetBit context * @param[in] band pointer to the band descriptor * @param[in] tile pointer to the tile descriptor * @return result code: 0 - OK, -1 = error (corrupted blocks data) */ static int ivi_decode_blocks(GetBitContext *gb, IVIBandDesc *band, IVITile *tile, AVCodecContext *avctx) { int mbn, blk, num_blocks, blk_size, ret, is_intra; int mc_type = 0, mc_type2 = -1; int mv_x = 0, mv_y = 0, mv_x2 = 0, mv_y2 = 0; int32_t prev_dc; uint32_t cbp, quant, buf_offs; IVIMbInfo *mb; ivi_mc_func mc_with_delta_func, mc_no_delta_func; ivi_mc_avg_func mc_avg_with_delta_func, mc_avg_no_delta_func; const uint8_t *scale_tab; /* init intra prediction for the DC coefficient */ prev_dc = 0; blk_size = band->blk_size; /* number of blocks per mb */ num_blocks = (band->mb_size != blk_size) ? 4 : 1; if (blk_size == 8) { mc_with_delta_func = ff_ivi_mc_8x8_delta; mc_no_delta_func = ff_ivi_mc_8x8_no_delta; mc_avg_with_delta_func = ff_ivi_mc_avg_8x8_delta; mc_avg_no_delta_func = ff_ivi_mc_avg_8x8_no_delta; } else { mc_with_delta_func = ff_ivi_mc_4x4_delta; mc_no_delta_func = ff_ivi_mc_4x4_no_delta; mc_avg_with_delta_func = ff_ivi_mc_avg_4x4_delta; mc_avg_no_delta_func = ff_ivi_mc_avg_4x4_no_delta; } for (mbn = 0, mb = tile->mbs; mbn < tile->num_MBs; mb++, mbn++) { is_intra = !mb->type; cbp = mb->cbp; buf_offs = mb->buf_offs; quant = band->glob_quant + mb->q_delta; if (avctx->codec_id == AV_CODEC_ID_INDEO4) quant = av_clip_uintp2(quant, 5); else quant = av_clip(quant, 0, 23); scale_tab = is_intra ? band->intra_scale : band->inter_scale; if (scale_tab) quant = scale_tab[quant]; if (!is_intra) { mv_x = mb->mv_x; mv_y = mb->mv_y; mv_x2 = mb->b_mv_x; mv_y2 = mb->b_mv_y; if (band->is_halfpel) { mc_type = ((mv_y & 1) << 1) | (mv_x & 1); mc_type2 = ((mv_y2 & 1) << 1) | (mv_x2 & 1); mv_x >>= 1; mv_y >>= 1; mv_x2 >>= 1; mv_y2 >>= 1; /* convert halfpel vectors into fullpel ones */ } if (mb->type == 2) mc_type = -1; if (mb->type != 2 && mb->type != 3) mc_type2 = -1; if (mb->type) { int dmv_x, dmv_y, cx, cy; dmv_x = mb->mv_x >> band->is_halfpel; dmv_y = mb->mv_y >> band->is_halfpel; cx = mb->mv_x & band->is_halfpel; cy = mb->mv_y & band->is_halfpel; if (mb->xpos + dmv_x < 0 || mb->xpos + dmv_x + band->mb_size + cx > band->pitch || mb->ypos + dmv_y < 0 || mb->ypos + dmv_y + band->mb_size + cy > band->aheight) { return AVERROR_INVALIDDATA; } } if (mb->type == 2 || mb->type == 3) { int dmv_x, dmv_y, cx, cy; dmv_x = mb->b_mv_x >> band->is_halfpel; dmv_y = mb->b_mv_y >> band->is_halfpel; cx = mb->b_mv_x & band->is_halfpel; cy = mb->b_mv_y & band->is_halfpel; if (mb->xpos + dmv_x < 0 || mb->xpos + dmv_x + band->mb_size + cx > band->pitch || mb->ypos + dmv_y < 0 || mb->ypos + dmv_y + band->mb_size + cy > band->aheight) { return AVERROR_INVALIDDATA; } } } for (blk = 0; blk < num_blocks; blk++) { /* adjust block position in the buffer according to its number */ if (blk & 1) { buf_offs += blk_size; } else if (blk == 2) { buf_offs -= blk_size; buf_offs += blk_size * band->pitch; } if (cbp & 1) { /* block coded ? */ ret = ivi_decode_coded_blocks(gb, band, mc_with_delta_func, mc_avg_with_delta_func, mv_x, mv_y, mv_x2, mv_y2, &prev_dc, is_intra, mc_type, mc_type2, quant, buf_offs, avctx); if (ret < 0) return ret; } else { /* block not coded */ /* for intra blocks apply the dc slant transform */ /* for inter - perform the motion compensation without delta */ if (is_intra) { ret = ivi_dc_transform(band, &prev_dc, buf_offs, blk_size); if (ret < 0) return ret; } else { ret = ivi_mc(band, mc_no_delta_func, mc_avg_no_delta_func, buf_offs, mv_x, mv_y, mv_x2, mv_y2, mc_type, mc_type2); if (ret < 0) return ret; } } cbp >>= 1; }// for blk }// for mbn align_get_bits(gb); return 0; } /** * Handle empty tiles by performing data copying and motion * compensation respectively. * * @param[in] avctx ptr to the AVCodecContext * @param[in] band pointer to the band descriptor * @param[in] tile pointer to the tile descriptor * @param[in] mv_scale scaling factor for motion vectors */ static int ivi_process_empty_tile(AVCodecContext *avctx, IVIBandDesc *band, IVITile *tile, int32_t mv_scale) { int x, y, need_mc, mbn, blk, num_blocks, mv_x, mv_y, mc_type; int offs, mb_offset, row_offset, ret; IVIMbInfo *mb, *ref_mb; const int16_t *src; int16_t *dst; ivi_mc_func mc_no_delta_func; if (tile->num_MBs != IVI_MBs_PER_TILE(tile->width, tile->height, band->mb_size)) { av_log(avctx, AV_LOG_ERROR, "Allocated tile size %d mismatches " "parameters %d in ivi_process_empty_tile()\n", tile->num_MBs, IVI_MBs_PER_TILE(tile->width, tile->height, band->mb_size)); return AVERROR_INVALIDDATA; } offs = tile->ypos * band->pitch + tile->xpos; mb = tile->mbs; ref_mb = tile->ref_mbs; row_offset = band->mb_size * band->pitch; need_mc = 0; /* reset the mc tracking flag */ for (y = tile->ypos; y < (tile->ypos + tile->height); y += band->mb_size) { mb_offset = offs; for (x = tile->xpos; x < (tile->xpos + tile->width); x += band->mb_size) { mb->xpos = x; mb->ypos = y; mb->buf_offs = mb_offset; mb->type = 1; /* set the macroblocks type = INTER */ mb->cbp = 0; /* all blocks are empty */ if (!band->qdelta_present && !band->plane && !band->band_num) { mb->q_delta = band->glob_quant; mb->mv_x = 0; mb->mv_y = 0; } if (band->inherit_qdelta && ref_mb) mb->q_delta = ref_mb->q_delta; if (band->inherit_mv && ref_mb) { /* motion vector inheritance */ if (mv_scale) { mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale); mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale); } else { mb->mv_x = ref_mb->mv_x; mb->mv_y = ref_mb->mv_y; } need_mc |= mb->mv_x || mb->mv_y; /* tracking non-zero motion vectors */ { int dmv_x, dmv_y, cx, cy; dmv_x = mb->mv_x >> band->is_halfpel; dmv_y = mb->mv_y >> band->is_halfpel; cx = mb->mv_x & band->is_halfpel; cy = mb->mv_y & band->is_halfpel; if ( mb->xpos + dmv_x < 0 || mb->xpos + dmv_x + band->mb_size + cx > band->pitch || mb->ypos + dmv_y < 0 || mb->ypos + dmv_y + band->mb_size + cy > band->aheight) { av_log(avctx, AV_LOG_ERROR, "MV out of bounds\n"); return AVERROR_INVALIDDATA; } } } mb++; if (ref_mb) ref_mb++; mb_offset += band->mb_size; } // for x offs += row_offset; } // for y if (band->inherit_mv && need_mc) { /* apply motion compensation if there is at least one non-zero motion vector */ num_blocks = (band->mb_size != band->blk_size) ? 4 : 1; /* number of blocks per mb */ mc_no_delta_func = (band->blk_size == 8) ? ff_ivi_mc_8x8_no_delta : ff_ivi_mc_4x4_no_delta; for (mbn = 0, mb = tile->mbs; mbn < tile->num_MBs; mb++, mbn++) { mv_x = mb->mv_x; mv_y = mb->mv_y; if (!band->is_halfpel) { mc_type = 0; /* we have only fullpel vectors */ } else { mc_type = ((mv_y & 1) << 1) | (mv_x & 1); mv_x >>= 1; mv_y >>= 1; /* convert halfpel vectors into fullpel ones */ } for (blk = 0; blk < num_blocks; blk++) { /* adjust block position in the buffer according with its number */ offs = mb->buf_offs + band->blk_size * ((blk & 1) + !!(blk & 2) * band->pitch); ret = ivi_mc(band, mc_no_delta_func, 0, offs, mv_x, mv_y, 0, 0, mc_type, -1); if (ret < 0) return ret; } } } else { /* copy data from the reference tile into the current one */ src = band->ref_buf + tile->ypos * band->pitch + tile->xpos; dst = band->buf + tile->ypos * band->pitch + tile->xpos; for (y = 0; y < tile->height; y++) { memcpy(dst, src, tile->width*sizeof(band->buf[0])); src += band->pitch; dst += band->pitch; } } return 0; } #ifdef DEBUG static uint16_t ivi_calc_band_checksum(IVIBandDesc *band) { int x, y; int16_t *src, checksum; src = band->buf; checksum = 0; for (y = 0; y < band->height; src += band->pitch, y++) for (x = 0; x < band->width; x++) checksum += src[x]; return checksum; } #endif /* * Convert and output the current plane. * This conversion is done by adding back the bias value of 128 * (subtracted in the encoder) and clipping the result. * * @param[in] plane pointer to the descriptor of the plane being processed * @param[out] dst pointer to the buffer receiving converted pixels * @param[in] dst_pitch pitch for moving to the next y line */ static void ivi_output_plane(IVIPlaneDesc *plane, uint8_t *dst, int dst_pitch) { int x, y; const int16_t *src = plane->bands[0].buf; uint32_t pitch = plane->bands[0].pitch; if (!src) return; for (y = 0; y < plane->height; y++) { for (x = 0; x < plane->width; x++) dst[x] = av_clip_uint8(src[x] + 128); src += pitch; dst += dst_pitch; } } /** * Decode an Indeo 4 or 5 band. * * @param[in,out] ctx ptr to the decoder context * @param[in,out] band ptr to the band descriptor * @param[in] avctx ptr to the AVCodecContext * @return result code: 0 = OK, -1 = error */ static int decode_band(IVI45DecContext *ctx, IVIBandDesc *band, AVCodecContext *avctx) { int result, i, t, idx1, idx2, pos; IVITile *tile; band->buf = band->bufs[ctx->dst_buf]; if (!band->buf) { av_log(avctx, AV_LOG_ERROR, "Band buffer points to no data!\n"); return AVERROR_INVALIDDATA; } if (ctx->is_indeo4 && ctx->frame_type == IVI4_FRAMETYPE_BIDIR) { band->ref_buf = band->bufs[ctx->b_ref_buf]; band->b_ref_buf = band->bufs[ctx->ref_buf]; } else { band->ref_buf = band->bufs[ctx->ref_buf]; band->b_ref_buf = 0; } band->data_ptr = ctx->frame_data + (get_bits_count(&ctx->gb) >> 3); result = ctx->decode_band_hdr(ctx, band, avctx); if (result) { av_log(avctx, AV_LOG_ERROR, "Error while decoding band header: %d\n", result); return result; } if (band->is_empty) { av_log(avctx, AV_LOG_ERROR, "Empty band encountered!\n"); return AVERROR_INVALIDDATA; } band->rv_map = &ctx->rvmap_tabs[band->rvmap_sel]; /* apply corrections to the selected rvmap table if present */ for (i = 0; i < band->num_corr; i++) { idx1 = band->corr[i * 2]; idx2 = band->corr[i * 2 + 1]; FFSWAP(uint8_t, band->rv_map->runtab[idx1], band->rv_map->runtab[idx2]); FFSWAP(int16_t, band->rv_map->valtab[idx1], band->rv_map->valtab[idx2]); if (idx1 == band->rv_map->eob_sym || idx2 == band->rv_map->eob_sym) band->rv_map->eob_sym ^= idx1 ^ idx2; if (idx1 == band->rv_map->esc_sym || idx2 == band->rv_map->esc_sym) band->rv_map->esc_sym ^= idx1 ^ idx2; } pos = get_bits_count(&ctx->gb); for (t = 0; t < band->num_tiles; t++) { tile = &band->tiles[t]; if (tile->mb_size != band->mb_size) { av_log(avctx, AV_LOG_ERROR, "MB sizes mismatch: %d vs. %d\n", band->mb_size, tile->mb_size); return AVERROR_INVALIDDATA; } tile->is_empty = get_bits1(&ctx->gb); if (tile->is_empty) { result = ivi_process_empty_tile(avctx, band, tile, (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3)); if (result < 0) break; ff_dlog(avctx, "Empty tile encountered!\n"); } else { tile->data_size = ivi_dec_tile_data_size(&ctx->gb); if (!tile->data_size) { av_log(avctx, AV_LOG_ERROR, "Tile data size is zero!\n"); result = AVERROR_INVALIDDATA; break; } result = ctx->decode_mb_info(ctx, band, tile, avctx); if (result < 0) break; result = ivi_decode_blocks(&ctx->gb, band, tile, avctx); if (result < 0) { av_log(avctx, AV_LOG_ERROR, "Corrupted tile data encountered!\n"); break; } if (((get_bits_count(&ctx->gb) - pos) >> 3) != tile->data_size) { av_log(avctx, AV_LOG_ERROR, "Tile data_size mismatch!\n"); result = AVERROR_INVALIDDATA; break; } pos += tile->data_size << 3; // skip to next tile } } /* restore the selected rvmap table by applying its corrections in * reverse order */ for (i = band->num_corr-1; i >= 0; i--) { idx1 = band->corr[i*2]; idx2 = band->corr[i*2+1]; FFSWAP(uint8_t, band->rv_map->runtab[idx1], band->rv_map->runtab[idx2]); FFSWAP(int16_t, band->rv_map->valtab[idx1], band->rv_map->valtab[idx2]); if (idx1 == band->rv_map->eob_sym || idx2 == band->rv_map->eob_sym) band->rv_map->eob_sym ^= idx1 ^ idx2; if (idx1 == band->rv_map->esc_sym || idx2 == band->rv_map->esc_sym) band->rv_map->esc_sym ^= idx1 ^ idx2; } #ifdef DEBUG if (band->checksum_present) { uint16_t chksum = ivi_calc_band_checksum(band); if (chksum != band->checksum) { av_log(avctx, AV_LOG_ERROR, "Band checksum mismatch! Plane %d, band %d, " "received: %"PRIx32", calculated: %"PRIx16"\n", band->plane, band->band_num, band->checksum, chksum); } } #endif align_get_bits(&ctx->gb); return result; } int ff_ivi_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt) { IVI45DecContext *ctx = avctx->priv_data; const uint8_t *buf = avpkt->data; AVFrame *frame = data; int buf_size = avpkt->size; int result, p, b; init_get_bits(&ctx->gb, buf, buf_size * 8); ctx->frame_data = buf; ctx->frame_size = buf_size; result = ctx->decode_pic_hdr(ctx, avctx); if (result) { av_log(avctx, AV_LOG_ERROR, "Error while decoding picture header: %d\n", result); return result; } if (ctx->gop_invalid) return AVERROR_INVALIDDATA; if (ctx->is_indeo4 && ctx->frame_type == IVI4_FRAMETYPE_NULL_LAST) { if (ctx->got_p_frame) { av_frame_move_ref(data, ctx->p_frame); *got_frame = 1; ctx->got_p_frame = 0; } else { *got_frame = 0; } return buf_size; } if (ctx->gop_flags & IVI5_IS_PROTECTED) { avpriv_report_missing_feature(avctx, "Password-protected clip"); return AVERROR_PATCHWELCOME; } if (!ctx->planes[0].bands) { av_log(avctx, AV_LOG_ERROR, "Color planes not initialized yet\n"); return AVERROR_INVALIDDATA; } ctx->switch_buffers(ctx); //{ START_TIMER; if (ctx->is_nonnull_frame(ctx)) { ctx->buf_invalid[ctx->dst_buf] = 1; for (p = 0; p < 3; p++) { for (b = 0; b < ctx->planes[p].num_bands; b++) { result = decode_band(ctx, &ctx->planes[p].bands[b], avctx); if (result < 0) { av_log(avctx, AV_LOG_ERROR, "Error while decoding band: %d, plane: %d\n", b, p); return result; } } } ctx->buf_invalid[ctx->dst_buf] = 0; } else { if (ctx->is_scalable) return AVERROR_INVALIDDATA; for (p = 0; p < 3; p++) { if (!ctx->planes[p].bands[0].buf) return AVERROR_INVALIDDATA; } } if (ctx->buf_invalid[ctx->dst_buf]) return -1; //STOP_TIMER("decode_planes"); } if (!ctx->is_nonnull_frame(ctx)) return buf_size; result = ff_set_dimensions(avctx, ctx->planes[0].width, ctx->planes[0].height); if (result < 0) return result; if ((result = ff_get_buffer(avctx, frame, 0)) < 0) return result; if (ctx->is_scalable) { if (ctx->is_indeo4) ff_ivi_recompose_haar(&ctx->planes[0], frame->data[0], frame->linesize[0]); else ff_ivi_recompose53 (&ctx->planes[0], frame->data[0], frame->linesize[0]); } else { ivi_output_plane(&ctx->planes[0], frame->data[0], frame->linesize[0]); } ivi_output_plane(&ctx->planes[2], frame->data[1], frame->linesize[1]); ivi_output_plane(&ctx->planes[1], frame->data[2], frame->linesize[2]); *got_frame = 1; /* If the bidirectional mode is enabled, next I and the following P * frame will be sent together. Unfortunately the approach below seems * to be the only way to handle the B-frames mode. * That's exactly the same Intel decoders do. */ if (ctx->is_indeo4 && ctx->frame_type == IVI4_FRAMETYPE_INTRA) { int left; // skip version string while (get_bits(&ctx->gb, 8)) { if (get_bits_left(&ctx->gb) < 8) return AVERROR_INVALIDDATA; } left = get_bits_count(&ctx->gb) & 0x18; skip_bits_long(&ctx->gb, 64 - left); if (get_bits_left(&ctx->gb) > 18 && show_bits_long(&ctx->gb, 21) == 0xBFFF8) { // syncheader + inter type AVPacket pkt; pkt.data = avpkt->data + (get_bits_count(&ctx->gb) >> 3); pkt.size = get_bits_left(&ctx->gb) >> 3; ff_ivi_decode_frame(avctx, ctx->p_frame, &ctx->got_p_frame, &pkt); } } if (ctx->show_indeo4_info) { if (ctx->is_scalable) av_log(avctx, AV_LOG_DEBUG, "This video uses scalability mode\n"); if (ctx->uses_tiling) av_log(avctx, AV_LOG_DEBUG, "This video uses local decoding\n"); if (ctx->has_b_frames) av_log(avctx, AV_LOG_DEBUG, "This video contains B-frames\n"); if (ctx->has_transp) av_log(avctx, AV_LOG_DEBUG, "Transparency mode is enabled\n"); if (ctx->uses_haar) av_log(avctx, AV_LOG_DEBUG, "This video uses Haar transform\n"); if (ctx->uses_fullpel) av_log(avctx, AV_LOG_DEBUG, "This video uses fullpel motion vectors\n"); ctx->show_indeo4_info = 0; } return buf_size; } /** * Close Indeo5 decoder and clean up its context. */ av_cold int ff_ivi_decode_close(AVCodecContext *avctx) { IVI45DecContext *ctx = avctx->priv_data; ivi_free_buffers(&ctx->planes[0]); if (ctx->mb_vlc.cust_tab.table) ff_free_vlc(&ctx->mb_vlc.cust_tab); av_frame_free(&ctx->p_frame); return 0; } /** * Scan patterns shared between indeo4 and indeo5 */ const uint8_t ff_ivi_vertical_scan_8x8[64] = { 0, 8, 16, 24, 32, 40, 48, 56, 1, 9, 17, 25, 33, 41, 49, 57, 2, 10, 18, 26, 34, 42, 50, 58, 3, 11, 19, 27, 35, 43, 51, 59, 4, 12, 20, 28, 36, 44, 52, 60, 5, 13, 21, 29, 37, 45, 53, 61, 6, 14, 22, 30, 38, 46, 54, 62, 7, 15, 23, 31, 39, 47, 55, 63 }; const uint8_t ff_ivi_horizontal_scan_8x8[64] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63 }; const uint8_t ff_ivi_direct_scan_4x4[16] = { 0, 1, 4, 8, 5, 2, 3, 6, 9, 12, 13, 10, 7, 11, 14, 15 }; /** * Run-value (RLE) tables. */ const RVMapDesc ff_ivi_rvmap_tabs[9] = { { /* MapTab0 */ 5, /* eob_sym */ 2, /* esc_sym */ /* run table */ {1, 1, 0, 1, 1, 0, 1, 1, 2, 2, 1, 1, 1, 1, 3, 3, 1, 1, 2, 2, 1, 1, 4, 4, 1, 1, 1, 1, 2, 2, 5, 5, 1, 1, 3, 3, 1, 1, 6, 6, 1, 2, 1, 2, 7, 7, 1, 1, 8, 8, 1, 1, 4, 2, 1, 4, 2, 1, 3, 3, 1, 1, 1, 9, 9, 1, 2, 1, 2, 1, 5, 5, 1, 1, 10, 10, 1, 1, 3, 3, 2, 2, 1, 1, 11, 11, 6, 4, 4, 1, 6, 1, 2, 1, 2, 12, 8, 1, 12, 7, 8, 7, 1, 16, 1, 16, 1, 3, 3, 13, 1, 13, 2, 2, 1, 15, 1, 5, 14, 15, 1, 5, 14, 1, 17, 8, 17, 8, 1, 4, 4, 2, 2, 1, 25, 25, 24, 24, 1, 3, 1, 3, 1, 8, 6, 7, 6, 1, 18, 8, 18, 1, 7, 23, 2, 2, 23, 1, 1, 21, 22, 9, 9, 22, 19, 1, 21, 5, 19, 5, 1, 33, 20, 33, 20, 8, 4, 4, 1, 32, 2, 2, 8, 3, 32, 26, 3, 1, 7, 7, 26, 6, 1, 6, 1, 1, 16, 1, 10, 1, 10, 2, 16, 29, 28, 2, 29, 28, 1, 27, 5, 8, 5, 27, 1, 8, 3, 7, 3, 31, 41, 31, 1, 41, 6, 1, 6, 7, 4, 4, 1, 1, 2, 1, 2, 11, 34, 30, 11, 1, 30, 15, 15, 34, 36, 40, 36, 40, 35, 35, 37, 37, 39, 39, 38, 38}, /* value table */ { 1, -1, 0, 2, -2, 0, 3, -3, 1, -1, 4, -4, 5, -5, 1, -1, 6, -6, 2, -2, 7, -7, 1, -1, 8, -8, 9, -9, 3, -3, 1, -1, 10, -10, 2, -2, 11, -11, 1, -1, 12, 4, -12, -4, 1, -1, 13, -13, 1, -1, 14, -14, 2, 5, 15, -2, -5, -15, -3, 3, 16, -16, 17, 1, -1, -17, 6, 18, -6, -18, 2, -2, 19, -19, 1, -1, 20, -20, 4, -4, 7, -7, 21, -21, 1, -1, 2, 3, -3, 22, -2, -22, 8, 23, -8, 1, 2, -23, -1, 2, -2, -2, 24, 1, -24, -1, 25, 5, -5, 1, -25, -1, 9, -9, 26, 1, -26, 3, 1, -1, 27, -3, -1, -27, 1, 3, -1, -3, 28, -4, 4, 10, -10, -28, 1, -1, 1, -1, 29, 6, -29, -6, 30, -4, 3, 3, -3, -30, 1, 4, -1, 31, -3, 1, 11, -11, -1, -31, 32, -1, -1, 2, -2, 1, 1, -32, 1, 4, -1, -4, 33, -1, 1, 1, -1, 5, 5, -5, -33, -1, -12, 12, -5, -7, 1, 1, 7, 34, 4, -4, -1, 4, -34, -4, 35, 36, -2, -35, -2, -36, 2, 13, 2, -1, 1, -13, 1, -1, 37, 1, -5, 6, 5, -1, 38, -6, -8, 5, 8, -1, 1, 1, -37, -1, 5, 39, -5, -5, 6, -6, -38, -39, -14, 40, 14, 2, 1, 1, -2, -40, -1, -2, 2, -1, -1, -1, 1, 1, 1, -1, 1, -1, 1, -1, 1, -1} },{ /* MapTab1 */ 0, /* eob_sym */ 38, /* esc_sym */ /* run table */ {0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 8, 6, 8, 7, 7, 9, 9, 10, 10, 11, 11, 1, 12, 1, 12, 13, 13, 16, 14, 16, 14, 15, 15, 17, 17, 18, 0, 18, 19, 20, 21, 19, 22, 21, 20, 22, 25, 24, 2, 25, 24, 23, 23, 2, 26, 28, 26, 28, 29, 27, 29, 27, 33, 33, 1, 32, 1, 3, 32, 30, 36, 3, 36, 30, 31, 31, 35, 34, 37, 41, 34, 35, 37, 4, 41, 4, 49, 8, 8, 49, 40, 38, 5, 38, 40, 39, 5, 39, 42, 43, 42, 7, 57, 6, 43, 44, 6, 50, 7, 44, 57, 48, 50, 48, 45, 45, 46, 47, 51, 46, 47, 58, 1, 51, 58, 1, 52, 59, 53, 9, 52, 55, 55, 59, 53, 56, 54, 56, 54, 9, 64, 64, 60, 63, 60, 63, 61, 62, 61, 62, 2, 10, 2, 10, 11, 1, 11, 13, 12, 1, 12, 13, 16, 16, 8, 8, 14, 3, 3, 15, 14, 15, 4, 4, 1, 17, 17, 5, 1, 7, 7, 5, 6, 1, 2, 2, 6, 22, 1, 25, 21, 22, 8, 24, 1, 21, 25, 24, 8, 18, 18, 23, 9, 20, 23, 33, 29, 33, 20, 1, 19, 1, 29, 36, 9, 36, 19, 41, 28, 57, 32, 3, 28, 3, 1, 27, 49, 49, 1, 32, 26, 26, 2, 4, 4, 7, 57, 41, 2, 7, 10, 5, 37, 16, 10, 27, 8, 8, 13, 16, 37, 13, 1, 5}, /* value table */ {0, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, 1, -1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 2, 1, -2, -1, 1, -1, 1, 1, -1, -1, 1, -1, 1, -1, 1, 0, -1, 1, 1, 1, -1, 1, -1, -1, -1, 1, 1, 2, -1, -1, 1, -1, -2, 1, 1, -1, -1, 1, 1, -1, -1, 1, -1, 3, 1, -3, 2, -1, 1, 1, -2, -1, -1, -1, 1, 1, 1, 1, 1, -1, -1, -1, 2, -1, -2, 1, 2, -2, -1, 1, 1, 2, -1, -1, 1, -2, -1, 1, 1, -1, 2, 1, 2, -1, 1, -2, -1, -2, -1, -1, 1, 1, -1, 1, -1, 1, 1, 1, -1, -1, 1, 4, -1, -1, -4, 1, 1, 1, 2, -1, -1, 1, -1, -1, 1, -1, -1, 1, -2, 1, -1, 1, 1, -1, -1, 1, 1, -1, -1, 3, 2, -3, -2, 2, 5, -2, 2, 2, -5, -2, -2, -2, 2, -3, 3, 2, 3, -3, 2, -2, -2, 3, -3, 6, 2, -2, 3, -6, 3, -3, -3, 3, 7, -4, 4, -3, 2, -7, 2, 2, -2, -4, 2, 8, -2, -2, -2, 4, 2, -2, 2, 3, 2, -2, -2, 2, 2, -2, -8, -2, 9, -2, 2, -3, -2, 2, -2, 2, 2, 2, 4, -2, -4, 10, 2, 2, -2, -9, -2, 2, -2, 5, 4, -4, 4, -2, 2, -5, -4, -3, 4, 2, -3, 3, -2, -5, 5, 3, 3, -2, -3, -10, -4} },{ /* MapTab2 */ 2, /* eob_sym */ 11, /* esc_sym */ /* run table */ {1, 1, 0, 2, 2, 1, 1, 3, 3, 4, 4, 0, 1, 1, 5, 5, 2, 2, 6, 6, 7, 7, 1, 8, 1, 8, 3, 3, 9, 9, 1, 2, 2, 1, 4, 10, 4, 10, 11, 11, 1, 5, 12, 12, 1, 5, 13, 13, 3, 3, 6, 6, 2, 2, 14, 14, 16, 16, 15, 7, 15, 8, 8, 7, 1, 1, 17, 17, 4, 4, 1, 1, 18, 18, 2, 2, 5, 5, 25, 3, 9, 3, 25, 9, 19, 24, 19, 24, 1, 21, 20, 1, 21, 22, 20, 22, 23, 23, 8, 6, 33, 6, 8, 33, 7, 7, 26, 26, 1, 32, 1, 32, 28, 4, 28, 10, 29, 27, 27, 10, 41, 4, 29, 2, 2, 41, 36, 31, 49, 31, 34, 30, 34, 36, 30, 35, 1, 49, 11, 5, 35, 11, 1, 3, 3, 5, 37, 37, 8, 40, 8, 40, 12, 12, 42, 42, 1, 38, 16, 57, 1, 6, 16, 39, 38, 6, 7, 7, 13, 13, 39, 43, 2, 43, 57, 2, 50, 9, 44, 9, 50, 4, 15, 48, 44, 4, 1, 15, 48, 14, 14, 1, 45, 45, 8, 3, 5, 8, 51, 47, 3, 46, 46, 47, 5, 51, 1, 17, 17, 58, 1, 58, 2, 52, 52, 2, 53, 7, 59, 6, 6, 56, 53, 55, 7, 55, 1, 54, 59, 56, 54, 10, 1, 10, 4, 60, 1, 60, 8, 4, 8, 64, 64, 61, 1, 63, 3, 63, 62, 61, 5, 11, 5, 3, 11, 62}, /* value table */ { 1, -1, 0, 1, -1, 2, -2, 1, -1, 1, -1, 0, 3, -3, 1, -1, 2, -2, 1, -1, 1, -1, 4, 1, -4, -1, 2, -2, 1, -1, 5, 3, -3, -5, 2, 1, -2, -1, 1, -1, 6, 2, 1, -1, -6, -2, 1, -1, 3, -3, 2, -2, 4, -4, 1, -1, 1, -1, 1, 2, -1, 2, -2, -2, 7, -7, 1, -1, 3, -3, 8, -8, 1, -1, 5, -5, 3, -3, 1, 4, 2, -4, -1, -2, 1, 1, -1, -1, 9, 1, 1, -9, -1, 1, -1, -1, 1, -1, 3, -3, 1, 3, -3, -1, 3, -3, 1, -1, 10, 1, -10, -1, 1, 4, -1, 2, 1, -1, 1, -2, 1, -4, -1, 6, -6, -1, 1, 1, 1, -1, 1, 1, -1, -1, -1, 1, 11, -1, -2, 4, -1, 2, -11, 5, -5, -4, -1, 1, 4, 1, -4, -1, -2, 2, 1, -1, 12, 1, -2, 1, -12, 4, 2, 1, -1, -4, 4, -4, 2, -2, -1, 1, 7, -1, -1, -7, -1, -3, 1, 3, 1, 5, 2, 1, -1, -5, 13, -2, -1, 2, -2, -13, 1, -1, 5, 6, 5, -5, 1, 1, -6, 1, -1, -1, -5, -1, 14, 2, -2, 1, -14, -1, 8, 1, -1, -8, 1, 5, 1, 5, -5, 1, -1, 1, -5, -1, 15, 1, -1, -1, -1, 3, -15, -3, 6, 1, 16, -1, 6, -6, -6, 1, -1, 1, -16, 1, 7, -1, 1, -1, -6, -3, 6, -7, 3, -1} },{ /* MapTab3 */ 0, /* eob_sym */ 35, /* esc_sym */ /* run table */ {0, 1, 1, 2, 2, 3, 3, 4, 4, 1, 1, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 2, 2, 10, 10, 1, 1, 11, 11, 12, 12, 3, 3, 13, 13, 0, 14, 14, 16, 15, 16, 15, 4, 4, 17, 1, 17, 1, 5, 5, 18, 18, 2, 2, 6, 6, 8, 19, 7, 8, 7, 19, 20, 20, 21, 21, 22, 24, 22, 24, 23, 23, 1, 1, 25, 25, 3, 3, 26, 26, 9, 9, 27, 27, 28, 28, 33, 29, 4, 33, 29, 1, 4, 1, 32, 32, 2, 2, 31, 10, 30, 10, 30, 31, 34, 34, 5, 5, 36, 36, 35, 41, 35, 11, 41, 11, 37, 1, 8, 8, 37, 6, 1, 6, 40, 7, 7, 40, 12, 38, 12, 39, 39, 38, 49, 13, 49, 13, 3, 42, 3, 42, 16, 16, 43, 43, 14, 14, 1, 1, 44, 15, 44, 15, 2, 2, 57, 48, 50, 48, 57, 50, 4, 45, 45, 4, 46, 47, 47, 46, 1, 51, 1, 17, 17, 51, 8, 9, 9, 5, 58, 8, 58, 5, 52, 52, 55, 56, 53, 56, 55, 59, 59, 53, 54, 1, 6, 54, 7, 7, 6, 1, 2, 3, 2, 3, 64, 60, 60, 10, 10, 64, 61, 62, 61, 63, 1, 63, 62, 1, 18, 24, 18, 4, 25, 4, 8, 21, 21, 1, 24, 22, 25, 22, 8, 11, 19, 11, 23, 1, 20, 23, 19, 20, 5, 12, 5, 1, 16, 2, 12, 13, 2, 13, 1, 16}, /* value table */ { 0, 1, -1, 1, -1, 1, -1, 1, -1, 2, -2, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 2, -2, 1, -1, 3, -3, 1, -1, 1, -1, 2, -2, 1, -1, 0, 1, -1, 1, 1, -1, -1, 2, -2, 1, 4, -1, -4, 2, -2, 1, -1, -3, 3, 2, -2, 2, 1, 2, -2, -2, -1, 1, -1, 1, -1, 1, 1, -1, -1, 1, -1, 5, -5, 1, -1, 3, -3, 1, -1, 2, -2, 1, -1, 1, -1, 1, 1, 3, -1, -1, 6, -3, -6, -1, 1, 4, -4, 1, 2, 1, -2, -1, -1, 1, -1, 3, -3, 1, -1, 1, 1, -1, 2, -1, -2, 1, 7, -3, 3, -1, 3, -7, -3, 1, -3, 3, -1, 2, 1, -2, 1, -1, -1, 1, 2, -1, -2, -4, -1, 4, 1, 2, -2, 1, -1, -2, 2, 8, -8, -1, 2, 1, -2, -5, 5, 1, -1, -1, 1, -1, 1, 4, -1, 1, -4, -1, -1, 1, 1, 9, 1, -9, 2, -2, -1, -4, 3, -3, -4, -1, 4, 1, 4, 1, -1, 1, -1, 1, 1, -1, 1, -1, -1, -1, 10, 4, 1, 4, -4, -4, -10, 6, 5, -6, -5, 1, -1, 1, 3, -3, -1, 1, -1, -1, -1, 11, 1, 1, -11, -2, -2, 2, 5, -2, -5, -5, 2, -2, 12, 2, -2, 2, 2, 5, -3, -2, 3, -2, -12, -2, 2, 2, 2, -5, 3, 5, 13, -3, 7, -3, -3, -7, 3, -13, 3} },{ /* MapTab4 */ 0, /* eob_sym */ 34, /* esc_sym */ /* run table */ {0, 1, 1, 1, 2, 2, 1, 3, 3, 1, 1, 1, 4, 4, 1, 5, 2, 1, 5, 2, 1, 1, 6, 6, 1, 1, 1, 1, 1, 7, 3, 1, 2, 3, 0, 1, 2, 7, 1, 1, 1, 8, 1, 1, 8, 1, 1, 1, 9, 1, 9, 1, 2, 1, 1, 2, 1, 1, 10, 4, 1, 10, 1, 4, 1, 1, 1, 1, 1, 3, 1, 1, 1, 3, 2, 1, 5, 1, 1, 1, 2, 5, 1, 11, 1, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 6, 1, 6, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 12, 3, 1, 12, 1, 1, 1, 2, 1, 1, 3, 1, 1, 1, 1, 1, 1, 4, 1, 1, 1, 2, 1, 1, 4, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 1, 2, 1, 1, 5, 1, 1, 1, 1, 1, 7, 1, 7, 1, 1, 2, 3, 1, 1, 1, 1, 5, 1, 1, 1, 1, 1, 1, 2, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 13, 2, 1, 1, 4, 1, 1, 1, 3, 1, 6, 1, 1, 1, 14, 1, 1, 1, 1, 1, 14, 6, 1, 1, 1, 1, 15, 2, 4, 1, 2, 3, 15, 1, 1, 1, 8, 1, 1, 8, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1}, /* value table */ { 0, 1, -1, 2, 1, -1, -2, 1, -1, 3, -3, 4, 1, -1, -4, 1, 2, 5, -1, -2, -5, 6, 1, -1, -6, 7, -7, 8, -8, 1, 2, 9, 3, -2, 0, -9, -3, -1, 10, -10, 11, 1, -11, 12, -1, -12, 13, -13, 1, 14, -1, -14, 4, 15, -15, -4, 16, -16, 1, 2, 17, -1, -17, -2, 18, -18, 19, -19, 20, 3, -20, 21, -21, -3, 5, 22, 2, -22, -23, 23, -5, -2, 24, 1, -24, -1, 25, -25, 26, -26, -27, 27, 28, 29, -28, -29, 6, 30, 2, -31, -2, -30, 31, -6, -32, 32, 33, -33, 34, -35, -34, 1, 4, -36, -1, 35, 37, 36, 7, -37, 38, -4, -38, 39, 41, 40, -40, -39, 3, 42, -43, -41, -7, -42, 43, -3, 44, -44, 45, -45, 46, 47, 8, -47, -48, -46, 50, -50, 48, 49, 51, -49, 52, -52, 5, -51, -8, -53, 53, 3, -56, 56, 55, 54, -54, 2, 60, -2, -55, 58, 9, -5, 59, 57, -57, -63, -3, -58, -60, -61, 61, -59, -62, -9, 1, 64, 62, 69, -64, 63, 65, -67, -68, 66, -65, 68, -66, -69, 67, -70, -1, 10, 71, -71, 4, 73, 72, 70, 6, -76, -3, 74, -78, -74, 1, 78, 80, -72, -75, 76, -1, 3, -73, 79, 75, 77, 1, 11, -4, -79, -10, -6, -1, -77, -83, -80, 2, 81, -84, -2, 83, -81, 82, -82, 84, -87, -86, 85, -11, -85, 86, -89, 87, -88, 88, 89} },{ /* MapTab5 */ 2, /* eob_sym */ 33, /* esc_sym */ /* run table */ {1, 1, 0, 2, 1, 2, 1, 3, 3, 1, 1, 4, 4, 2, 2, 1, 1, 5, 5, 6, 1, 6, 1, 7, 7, 3, 3, 2, 8, 2, 8, 1, 1, 0, 9, 9, 1, 1, 10, 4, 10, 4, 11, 11, 2, 1, 2, 1, 12, 12, 3, 3, 1, 1, 13, 5, 5, 13, 14, 1, 1, 14, 2, 2, 6, 6, 15, 1, 1, 15, 16, 4, 7, 16, 4, 7, 1, 1, 3, 3, 8, 8, 2, 2, 1, 1, 17, 17, 1, 1, 18, 18, 5, 5, 2, 2, 1, 1, 9, 19, 9, 19, 20, 3, 3, 20, 1, 10, 21, 1, 10, 4, 4, 21, 22, 6, 6, 22, 1, 1, 23, 24, 2, 2, 23, 24, 11, 1, 1, 11, 7, 25, 7, 1, 1, 25, 8, 8, 3, 26, 3, 1, 12, 2, 2, 26, 1, 12, 5, 5, 27, 4, 1, 4, 1, 27, 28, 1, 28, 13, 1, 13, 2, 29, 2, 1, 32, 6, 1, 30, 14, 29, 14, 6, 3, 31, 3, 1, 30, 1, 32, 31, 33, 9, 33, 1, 1, 7, 9, 7, 2, 2, 1, 1, 4, 36, 34, 4, 5, 10, 10, 5, 34, 1, 1, 35, 8, 8, 36, 3, 35, 1, 15, 3, 2, 1, 16, 15, 16, 2, 37, 1, 37, 1, 1, 1, 6, 6, 38, 1, 38, 11, 1, 39, 39, 40, 11, 2, 41, 4, 40, 1, 2, 4, 1, 1, 1, 41, 3, 1, 3, 1, 5, 7, 5, 7}, /* value table */ { 1, -1, 0, 1, 2, -1, -2, 1, -1, 3, -3, 1, -1, 2, -2, 4, -4, 1, -1, 1, 5, -1, -5, 1, -1, 2, -2, 3, 1, -3, -1, 6, -6, 0, 1, -1, 7, -7, 1, 2, -1, -2, 1, -1, 4, 8, -4, -8, 1, -1, 3, -3, 9, -9, 1, 2, -2, -1, 1, 10, -10, -1, 5, -5, 2, -2, 1, 11, -11, -1, 1, 3, 2, -1, -3, -2, 12, -12, 4, -4, 2, -2, -6, 6, 13, -13, 1, -1, 14, -14, 1, -1, 3, -3, 7, -7, 15, -15, 2, 1, -2, -1, 1, 5, -5, -1, -16, 2, 1, 16, -2, 4, -4, -1, 1, 3, -3, -1, 17, -17, 1, 1, -8, 8, -1, -1, 2, 18, -18, -2, 3, 1, -3, 19, -19, -1, 3, -3, 6, 1, -6, 20, 2, 9, -9, -1, -20, -2, 4, -4, 1, -5, 21, 5, -21, -1, 1, -22, -1, 2, 22, -2, 10, 1, -10, 23, 1, 4, -23, 1, 2, -1, -2, -4, -7, 1, 7, -24, -1, 24, -1, -1, 1, 3, -1, -25, 25, 4, -3, -4, 11, -11, 26, -26, 6, 1, 1, -6, -5, -3, 3, 5, -1, -27, 27, 1, 4, -4, -1, -8, -1, 28, 2, 8, -12, -28, -2, -2, 2, 12, -1, 29, 1, -29, 30, -30, 5, -5, 1, -31, -1, 3, 31, -1, 1, 1, -3, -13, 1, -7, -1, -32, 13, 7, 32, 33, -33, -1, -9, -34, 9, 34, -6, 5, 6, -5} },{ /* MapTab6 */ 2, /* eob_sym */ 13, /* esc_sym */ /* run table */ {1, 1, 0, 1, 1, 2, 2, 1, 1, 3, 3, 1, 1, 0, 2, 2, 4, 1, 4, 1, 1, 1, 5, 5, 1, 1, 6, 6, 2, 2, 1, 1, 3, 3, 7, 7, 1, 1, 8, 8, 1, 1, 2, 2, 1, 9, 1, 9, 4, 4, 10, 1, 1, 10, 1, 1, 11, 11, 3, 3, 1, 2, 1, 2, 1, 1, 12, 12, 5, 5, 1, 1, 13, 1, 1, 13, 2, 2, 1, 1, 6, 6, 1, 1, 4, 14, 4, 14, 3, 1, 3, 1, 1, 1, 15, 7, 15, 2, 2, 7, 1, 1, 1, 8, 1, 8, 16, 16, 1, 1, 1, 1, 2, 1, 1, 2, 1, 1, 3, 5, 5, 3, 4, 1, 1, 4, 1, 1, 17, 17, 9, 1, 1, 9, 2, 2, 1, 1, 10, 10, 1, 6, 1, 1, 6, 18, 1, 1, 18, 1, 1, 1, 2, 2, 3, 1, 3, 1, 1, 1, 4, 1, 19, 1, 19, 7, 1, 1, 20, 1, 4, 20, 1, 7, 11, 2, 1, 11, 21, 2, 8, 5, 1, 8, 1, 5, 21, 1, 1, 1, 22, 1, 1, 22, 1, 1, 3, 3, 1, 23, 2, 12, 24, 1, 1, 2, 1, 1, 12, 23, 1, 1, 24, 1, 1, 1, 4, 1, 1, 1, 2, 1, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 14, 13, 3, 1, 25, 9, 25, 14, 1, 9, 3, 13, 1, 1, 1, 1, 1, 10, 1, 1, 2, 10, 2}, /* value table */ {-20, -1, 0, 2, -2, 1, -1, 3, -3, 1, -1, 4, -4, 0, 2, -2, 1, 5, -1, -5, 6, -6, 1, -1, 7, -7, 1, -1, 3, -3, 8, -8, 2, -2, 1, -1, 9, -9, 1, -1, 10, -10, 4, -4, 11, 1, -11, -1, 2, -2, 1, 12, -12, -1, 13, -13, 1, -1, 3, -3, 14, 5, -14, -5, -15, 15, -1, 1, 2, -2, 16, -16, 1, 17, -17, -1, 6, -6, 18, -18, 2, -2, -19, 19, -3, 1, 3, -1, 4, 20, -4, 1, -21, 21, 1, 2, -1, -7, 7, -2, 22, -22, 23, 2, -23, -2, 1, -1, -24, 24, -25, 25, -8, -26, 26, 8, -27, 27, 5, 3, -3, -5, -4, 28, -28, 4, 29, -29, 1, -1, -2, -30, 30, 2, 9, -9, -31, 31, 2, -2, -32, 3, 32, -33, -3, 1, 33, -34, -1, 34, -35, 35, -10, 10, -6, 36, 6, -36, 37, -37, -5, 38, 1, -38, -1, 3, 39, -39, -1, 40, 5, 1, -40, -3, 2, -11, -41, -2, 1, 11, -3, -4, 41, 3, 42, 4, -1, -43, -42, 43, 1, -44, 45, -1, 44, -45, -7, 7, -46, 1, -12, 2, 1, -47, 46, 12, 47, 48, -2, -1, -48, 49, -1, -50, -49, 50, -6, -51, 51, 52, -13, 53, -4, 4, 6, 13, -53, -52, -54, 55, 54, -55, -56, -2, 2, -8, 56, 1, -3, -1, 2, 58, 3, 8, -2, 57, -58, -60, -59, -57, -3, 60, 59, -14, 3, 14} },{ /* MapTab7 */ 2, /* eob_sym */ 38, /* esc_sym */ /* run table */ {1, 1, 0, 2, 2, 1, 1, 3, 3, 4, 4, 5, 5, 1, 1, 6, 6, 2, 2, 7, 7, 8, 8, 1, 1, 3, 3, 9, 9, 10, 10, 1, 1, 2, 2, 4, 4, 11, 0, 11, 12, 12, 13, 13, 1, 1, 5, 5, 14, 14, 15, 16, 15, 16, 3, 3, 1, 6, 1, 6, 2, 2, 7, 7, 8, 8, 17, 17, 1, 1, 4, 4, 18, 18, 2, 2, 1, 19, 1, 20, 19, 20, 21, 21, 3, 3, 22, 22, 5, 5, 24, 1, 1, 23, 9, 23, 24, 9, 2, 2, 10, 1, 1, 10, 6, 6, 25, 4, 4, 25, 7, 7, 26, 8, 1, 8, 3, 1, 26, 3, 11, 11, 27, 27, 2, 28, 1, 2, 28, 1, 12, 12, 5, 5, 29, 13, 13, 29, 32, 1, 1, 33, 31, 30, 32, 4, 30, 33, 4, 31, 3, 14, 1, 1, 3, 34, 34, 2, 2, 14, 6, 6, 35, 36, 35, 36, 1, 15, 1, 16, 16, 15, 7, 9, 7, 9, 37, 8, 8, 37, 1, 1, 39, 2, 38, 39, 2, 40, 5, 38, 40, 5, 3, 3, 4, 4, 10, 10, 1, 1, 1, 1, 41, 2, 41, 2, 6, 6, 1, 1, 11, 42, 11, 43, 3, 42, 3, 17, 4, 43, 1, 17, 7, 1, 8, 44, 4, 7, 44, 5, 8, 2, 5, 1, 2, 48, 45, 1, 12, 45, 12, 48, 13, 13, 1, 9, 9, 46, 1, 46, 47, 47, 49, 18, 18, 49}, /* value table */ { 1, -1, 0, 1, -1, 2, -2, 1, -1, 1, -1, 1, -1, 3, -3, 1, -1, -2, 2, 1, -1, 1, -1, 4, -4, -2, 2, 1, -1, 1, -1, 5, -5, -3, 3, 2, -2, 1, 0, -1, 1, -1, 1, -1, 6, -6, 2, -2, 1, -1, 1, 1, -1, -1, -3, 3, 7, 2, -7, -2, -4, 4, 2, -2, 2, -2, 1, -1, 8, -8, 3, -3, 1, -1, -5, 5, 9, 1, -9, 1, -1, -1, 1, -1, -4, 4, 1, -1, 3, -3, 1, -10, 10, 1, 2, -1, -1, -2, 6, -6, 2, 11, -11, -2, 3, -3, 1, -4, 4, -1, 3, -3, 1, 3, 12, -3, -5, -12, -1, 5, 2, -2, 1, -1, -7, 1, 13, 7, -1, -13, 2, -2, 4, -4, 1, 2, -2, -1, 1, 14, -14, 1, 1, 1, -1, -5, -1, -1, 5, -1, -6, 2, -15, 15, 6, 1, -1, -8, 8, -2, -4, 4, 1, 1, -1, -1, 16, 2, -16, -2, 2, -2, 4, 3, -4, -3, -1, -4, 4, 1, -17, 17, -1, -9, 1, 1, 9, 1, -5, -1, -1, 5, -7, 7, 6, -6, 3, -3, 18, -18, 19, -19, 1, -10, -1, 10, -5, 5, 20, -20, -3, 1, 3, 1, 8, -1, -8, 2, 7, -1, -21, -2, 5, 21, 5, -1, -7, -5, 1, -6, -5, -11, 6, 22, 11, 1, 1, -22, -3, -1, 3, -1, 3, -3, -23, 4, -4, 1, 23, -1, 1, -1, 1, -2, 2, -1} },{ /* MapTab8 */ 4, /* eob_sym */ 11, /* esc_sym */ /* run table */ {1, 1, 1, 1, 0, 2, 2, 1, 1, 3, 3, 0, 1, 1, 2, 2, 4, 4, 1, 1, 5, 5, 1, 1, 2, 2, 3, 3, 6, 6, 1, 1, 7, 7, 8, 1, 8, 2, 2, 1, 4, 4, 1, 3, 1, 3, 9, 9, 2, 2, 1, 5, 1, 5, 10, 10, 1, 1, 11, 11, 3, 6, 3, 4, 4, 6, 2, 2, 1, 12, 1, 12, 7, 13, 7, 13, 1, 1, 8, 8, 2, 2, 14, 14, 16, 15, 16, 5, 5, 1, 3, 15, 1, 3, 4, 4, 1, 1, 17, 17, 2, 2, 6, 6, 1, 18, 1, 18, 22, 21, 22, 21, 25, 24, 25, 19, 9, 20, 9, 23, 19, 24, 20, 3, 23, 7, 3, 1, 1, 7, 28, 26, 29, 5, 28, 26, 5, 8, 29, 4, 8, 27, 2, 2, 4, 27, 1, 1, 10, 36, 10, 33, 33, 36, 30, 1, 32, 32, 1, 30, 6, 31, 31, 35, 3, 6, 11, 11, 3, 2, 35, 2, 34, 1, 34, 1, 37, 37, 12, 7, 12, 5, 41, 5, 4, 7, 1, 8, 13, 4, 1, 41, 13, 38, 8, 38, 9, 1, 40, 40, 9, 1, 39, 2, 2, 49, 39, 42, 3, 3, 14, 16, 49, 14, 16, 42, 43, 43, 6, 6, 15, 1, 1, 15, 44, 44, 1, 1, 50, 48, 4, 5, 4, 7, 5, 2, 10, 10, 48, 7, 50, 45, 2, 1, 45, 8, 8, 1, 46, 46, 3, 47, 47, 3, 1, 1}, /* value table */ { 1, -1, 2, -2, 0, 1, -1, 3, -3, 1, -1, 0, 4, -4, 2, -2, 1, -1, 5, -5, 1, -1, 6, -6, 3, -3, 2, -2, 1, -1, 7, -7, 1, -1, 1, 8, -1, 4, -4, -8, 2, -2, 9, 3, -9, -3, 1, -1, 5, -5, 10, 2, -10, -2, 1, -1, 11, -11, 1, -1, -4, 2, 4, 3, -3, -2, 6, -6, 12, 1, -12, -1, 2, 1, -2, -1, 13, -13, 2, -2, 7, -7, 1, -1, 1, 1, -1, 3, -3, 14, 5, -1, -14, -5, 4, -4, 15, -15, 1, -1, 8, -8, -3, 3, 16, 1, -16, -1, 1, 1, -1, -1, 1, 1, -1, 1, 2, 1, -2, 1, -1, -1, -1, 6, -1, 3, -6, 17, -17, -3, 1, 1, 1, 4, -1, -1, -4, 3, -1, 5, -3, -1, -9, 9, -5, 1, 18, -18, 2, 1, -2, 1, -1, -1, 1, 19, -1, 1, -19, -1, 4, 1, -1, 1, 7, -4, -2, 2, -7, 10, -1, -10, 1, 20, -1, -20, 1, -1, 2, 4, -2, 5, 1, -5, 6, -4, 21, 4, 2, -6, -21, -1, -2, 1, -4, -1, -3, 22, -1, 1, 3, -22, -1, 11, -11, 1, 1, 1, 8, -8, 2, 2, -1, -2, -2, -1, 1, -1, -5, 5, 2, 23, -23, -2, 1, -1, 24, -24, -1, -1, 7, 6, -7, 5, -6, 12, -3, 3, 1, -5, 1, 1, -12, 25, -1, -5, 5, -25, -1, 1, 9, 1, -1, -9, 26, -26} } };