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 Libav. 7 * 8 * Libav 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 * Libav 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 Libav; 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 "dv_vlc_data.h" 28 29#if CONFIG_SMALL 30#define DV_VLC_MAP_RUN_SIZE 15 31#define DV_VLC_MAP_LEV_SIZE 23 32#else 33#define DV_VLC_MAP_RUN_SIZE 64 34#define DV_VLC_MAP_LEV_SIZE 512 //FIXME sign was removed so this should be /2 but needs check 35#endif 36 37/* VLC encoding lookup table */ 38typedef struct dv_vlc_pair { 39 uint32_t vlc; 40 uint32_t size; 41} dv_vlc_pair; 42 43#if CONFIG_HARDCODED_TABLES 44#define dv_vlc_map_tableinit() 45#include "libavcodec/dv_tables.h" 46#else 47static struct dv_vlc_pair dv_vlc_map[DV_VLC_MAP_RUN_SIZE][DV_VLC_MAP_LEV_SIZE]; 48 49static void dv_vlc_map_tableinit(void) 50{ 51 int i, j; 52 for (i = 0; i < NB_DV_VLC - 1; i++) { 53 if (dv_vlc_run[i] >= DV_VLC_MAP_RUN_SIZE) 54 continue; 55#if CONFIG_SMALL 56 if (dv_vlc_level[i] >= DV_VLC_MAP_LEV_SIZE) 57 continue; 58#endif 59 60 if (dv_vlc_map[dv_vlc_run[i]][dv_vlc_level[i]].size != 0) 61 continue; 62 63 dv_vlc_map[dv_vlc_run[i]][dv_vlc_level[i]].vlc = 64 dv_vlc_bits[i] << (!!dv_vlc_level[i]); 65 dv_vlc_map[dv_vlc_run[i]][dv_vlc_level[i]].size = 66 dv_vlc_len[i] + (!!dv_vlc_level[i]); 67 } 68 for (i = 0; i < DV_VLC_MAP_RUN_SIZE; i++) { 69#if CONFIG_SMALL 70 for (j = 1; j < DV_VLC_MAP_LEV_SIZE; j++) { 71 if (dv_vlc_map[i][j].size == 0) { 72 dv_vlc_map[i][j].vlc = dv_vlc_map[0][j].vlc | 73 (dv_vlc_map[i-1][0].vlc << (dv_vlc_map[0][j].size)); 74 dv_vlc_map[i][j].size = dv_vlc_map[i-1][0].size + 75 dv_vlc_map[0][j].size; 76 } 77 } 78#else 79 for (j = 1; j < DV_VLC_MAP_LEV_SIZE/2; j++) { 80 if (dv_vlc_map[i][j].size == 0) { 81 dv_vlc_map[i][j].vlc = dv_vlc_map[0][j].vlc | 82 (dv_vlc_map[i-1][0].vlc << (dv_vlc_map[0][j].size)); 83 dv_vlc_map[i][j].size = dv_vlc_map[i-1][0].size + 84 dv_vlc_map[0][j].size; 85 } 86 dv_vlc_map[i][((uint16_t)(-j))&0x1ff].vlc = 87 dv_vlc_map[i][j].vlc | 1; 88 dv_vlc_map[i][((uint16_t)(-j))&0x1ff].size = 89 dv_vlc_map[i][j].size; 90 } 91#endif 92 } 93} 94#endif /* CONFIG_HARDCODED_TABLES */ 95 96#endif /* AVCODEC_DV_TABLEGEN_H */ 97