1/* 2 * Header file for hardcoded DV tables 3 * 4 * Copyright (c) 2010 Reimar D��ffinger <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 28#include "dvdata.h" 29 30#if CONFIG_SMALL 31#define DV_VLC_MAP_RUN_SIZE 15 32#define DV_VLC_MAP_LEV_SIZE 23 33#else 34#define DV_VLC_MAP_RUN_SIZE 64 35#define DV_VLC_MAP_LEV_SIZE 512 //FIXME sign was removed so this should be /2 but needs check 36#endif 37 38/* VLC encoding lookup table */ 39typedef struct dv_vlc_pair { 40 uint32_t vlc; 41 uint32_t size; 42} dv_vlc_pair; 43 44#if CONFIG_HARDCODED_TABLES 45#define dv_vlc_map_tableinit() 46#include "libavcodec/dv_tables.h" 47#else 48static struct dv_vlc_pair dv_vlc_map[DV_VLC_MAP_RUN_SIZE][DV_VLC_MAP_LEV_SIZE]; 49 50static void dv_vlc_map_tableinit(void) 51{ 52 int i, j; 53 for (i = 0; i < NB_DV_VLC - 1; i++) { 54 if (ff_dv_vlc_run[i] >= DV_VLC_MAP_RUN_SIZE) 55 continue; 56#if CONFIG_SMALL 57 if (ff_dv_vlc_level[i] >= DV_VLC_MAP_LEV_SIZE) 58 continue; 59#endif 60 61 if (dv_vlc_map[ff_dv_vlc_run[i]][ff_dv_vlc_level[i]].size != 0) 62 continue; 63 64 dv_vlc_map[ff_dv_vlc_run[i]][ff_dv_vlc_level[i]].vlc = 65 ff_dv_vlc_bits[i] << (!!ff_dv_vlc_level[i]); 66 dv_vlc_map[ff_dv_vlc_run[i]][ff_dv_vlc_level[i]].size = 67 ff_dv_vlc_len[i] + (!!ff_dv_vlc_level[i]); 68 } 69 for (i = 0; i < DV_VLC_MAP_RUN_SIZE; i++) { 70#if CONFIG_SMALL 71 for (j = 1; j < DV_VLC_MAP_LEV_SIZE; j++) { 72 if (dv_vlc_map[i][j].size == 0) { 73 dv_vlc_map[i][j].vlc = dv_vlc_map[0][j].vlc | 74 (dv_vlc_map[i-1][0].vlc << (dv_vlc_map[0][j].size)); 75 dv_vlc_map[i][j].size = dv_vlc_map[i-1][0].size + 76 dv_vlc_map[0][j].size; 77 } 78 } 79#else 80 for (j = 1; j < DV_VLC_MAP_LEV_SIZE/2; j++) { 81 if (dv_vlc_map[i][j].size == 0) { 82 dv_vlc_map[i][j].vlc = dv_vlc_map[0][j].vlc | 83 (dv_vlc_map[i-1][0].vlc << (dv_vlc_map[0][j].size)); 84 dv_vlc_map[i][j].size = dv_vlc_map[i-1][0].size + 85 dv_vlc_map[0][j].size; 86 } 87 dv_vlc_map[i][((uint16_t)(-j))&0x1ff].vlc = 88 dv_vlc_map[i][j].vlc | 1; 89 dv_vlc_map[i][((uint16_t)(-j))&0x1ff].size = 90 dv_vlc_map[i][j].size; 91 } 92#endif 93 } 94} 95#endif /* CONFIG_HARDCODED_TABLES */ 96 97#endif /* AVCODEC_DV_TABLEGEN_H */ 98