repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ba45a60 DM |
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 | ||
| 51 | static 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 */ |