/* * Header file for hardcoded DV tables * * Copyright (c) 2010 Reimar Döffinger <Reimar.Doeffinger@gmx.de> * * 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 */ #ifndef AVCODEC_DV_TABLEGEN_H #define AVCODEC_DV_TABLEGEN_H #include <stdint.h> #include "libavutil/attributes.h" #include "dvdata.h" #if CONFIG_SMALL #define DV_VLC_MAP_RUN_SIZE 15 #define DV_VLC_MAP_LEV_SIZE 23 #else #define DV_VLC_MAP_RUN_SIZE 64 #define DV_VLC_MAP_LEV_SIZE 512 // FIXME sign was removed so this should be /2 but needs check #endif /* VLC encoding lookup table */ typedef struct dv_vlc_pair { uint32_t vlc; uint32_t size; } dv_vlc_pair; #if CONFIG_HARDCODED_TABLES #define dv_vlc_map_tableinit() #include "libavcodec/dv_tables.h" #else static struct dv_vlc_pair dv_vlc_map[DV_VLC_MAP_RUN_SIZE][DV_VLC_MAP_LEV_SIZE]; static av_cold void dv_vlc_map_tableinit(void) { int i, j; for (i = 0; i < NB_DV_VLC - 1; i++) { if (ff_dv_vlc_run[i] >= DV_VLC_MAP_RUN_SIZE) continue; #if CONFIG_SMALL if (ff_dv_vlc_level[i] >= DV_VLC_MAP_LEV_SIZE) continue; #endif if (dv_vlc_map[ff_dv_vlc_run[i]][ff_dv_vlc_level[i]].size != 0) continue; dv_vlc_map[ff_dv_vlc_run[i]][ff_dv_vlc_level[i]].vlc = ff_dv_vlc_bits[i] << (!!ff_dv_vlc_level[i]); dv_vlc_map[ff_dv_vlc_run[i]][ff_dv_vlc_level[i]].size = ff_dv_vlc_len[i] + (!!ff_dv_vlc_level[i]); } for (i = 0; i < DV_VLC_MAP_RUN_SIZE; i++) { #if CONFIG_SMALL for (j = 1; j < DV_VLC_MAP_LEV_SIZE; j++) { if (dv_vlc_map[i][j].size == 0) { dv_vlc_map[i][j].vlc = dv_vlc_map[0][j].vlc | (dv_vlc_map[i - 1][0].vlc << dv_vlc_map[0][j].size); dv_vlc_map[i][j].size = dv_vlc_map[i - 1][0].size + dv_vlc_map[0][j].size; } } #else for (j = 1; j < DV_VLC_MAP_LEV_SIZE / 2; j++) { if (dv_vlc_map[i][j].size == 0) { dv_vlc_map[i][j].vlc = dv_vlc_map[0][j].vlc | (dv_vlc_map[i - 1][0].vlc << dv_vlc_map[0][j].size); dv_vlc_map[i][j].size = dv_vlc_map[i - 1][0].size + dv_vlc_map[0][j].size; } dv_vlc_map[i][((uint16_t) (-j)) & 0x1ff].vlc = dv_vlc_map[i][j].vlc | 1; dv_vlc_map[i][((uint16_t) (-j)) & 0x1ff].size = dv_vlc_map[i][j].size; } #endif } } #endif /* CONFIG_HARDCODED_TABLES */ #endif /* AVCODEC_DV_TABLEGEN_H */