mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-21 10:55:51 +02:00
98 lines
3.2 KiB
C
98 lines
3.2 KiB
C
/*
|
|
* Header file for hardcoded DV tables
|
|
*
|
|
* Copyright (c) 2010 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
|
|
*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav 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.
|
|
*
|
|
* Libav 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 Libav; 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 "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 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 */
|