1 /* 2 * Header file for hardcoded DV tables 3 * 4 * Copyright (c) 2010 Reimar Döffinger <Reimar.Doeffinger@gmx.de> 5 * 6 * This file is part of FFmpeg. 7 * 8 * FFmpeg 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 * FFmpeg 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 FFmpeg; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 21 */ 22 23 #ifndef AVCODEC_DV_TABLEGEN_H 24 #define AVCODEC_DV_TABLEGEN_H 25 26 #include <stdint.h> 27 #include "libavutil/attributes.h" 28 29 #include "dvdata.h" 30 31 #if CONFIG_SMALL 32 #define DV_VLC_MAP_RUN_SIZE 15 33 #define DV_VLC_MAP_LEV_SIZE 23 34 #else 35 #define DV_VLC_MAP_RUN_SIZE 64 36 #define DV_VLC_MAP_LEV_SIZE 512 // FIXME sign was removed so this should be /2 but needs check 37 #endif 38 39 /* VLC encoding lookup table */ 40 typedef struct dv_vlc_pair { 41 uint32_t vlc; 42 uint32_t size; 43 } dv_vlc_pair; 44 45 #if CONFIG_HARDCODED_TABLES 46 #define dv_vlc_map_tableinit() 47 #include "libavcodec/dv_tables.h" 48 #else 49 static struct dv_vlc_pair dv_vlc_map[DV_VLC_MAP_RUN_SIZE][DV_VLC_MAP_LEV_SIZE]; 50 dv_vlc_map_tableinit(void)51static av_cold void dv_vlc_map_tableinit(void) 52 { 53 int i, j; 54 for (i = 0; i < NB_DV_VLC - 1; i++) { 55 if (ff_dv_vlc_run[i] >= DV_VLC_MAP_RUN_SIZE) 56 continue; 57 #if CONFIG_SMALL 58 if (ff_dv_vlc_level[i] >= DV_VLC_MAP_LEV_SIZE) 59 continue; 60 #endif 61 62 if (dv_vlc_map[ff_dv_vlc_run[i]][ff_dv_vlc_level[i]].size != 0) 63 continue; 64 65 dv_vlc_map[ff_dv_vlc_run[i]][ff_dv_vlc_level[i]].vlc = 66 ff_dv_vlc_bits[i] << (!!ff_dv_vlc_level[i]); 67 dv_vlc_map[ff_dv_vlc_run[i]][ff_dv_vlc_level[i]].size = 68 ff_dv_vlc_len[i] + (!!ff_dv_vlc_level[i]); 69 } 70 for (i = 0; i < DV_VLC_MAP_RUN_SIZE; i++) { 71 #if CONFIG_SMALL 72 for (j = 1; j < DV_VLC_MAP_LEV_SIZE; j++) { 73 if (dv_vlc_map[i][j].size == 0) { 74 dv_vlc_map[i][j].vlc = dv_vlc_map[0][j].vlc | 75 (dv_vlc_map[i - 1][0].vlc << 76 dv_vlc_map[0][j].size); 77 dv_vlc_map[i][j].size = dv_vlc_map[i - 1][0].size + 78 dv_vlc_map[0][j].size; 79 } 80 } 81 #else 82 for (j = 1; j < DV_VLC_MAP_LEV_SIZE / 2; j++) { 83 if (dv_vlc_map[i][j].size == 0) { 84 dv_vlc_map[i][j].vlc = dv_vlc_map[0][j].vlc | 85 (dv_vlc_map[i - 1][0].vlc << 86 dv_vlc_map[0][j].size); 87 dv_vlc_map[i][j].size = dv_vlc_map[i - 1][0].size + 88 dv_vlc_map[0][j].size; 89 } 90 dv_vlc_map[i][((uint16_t) (-j)) & 0x1ff].vlc = dv_vlc_map[i][j].vlc | 1; 91 dv_vlc_map[i][((uint16_t) (-j)) & 0x1ff].size = dv_vlc_map[i][j].size; 92 } 93 #endif 94 } 95 } 96 #endif /* CONFIG_HARDCODED_TABLES */ 97 98 #endif /* AVCODEC_DV_TABLEGEN_H */ 99