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/*
* Header file for hardcoded DV tables
*
* Copyright (c) 2010 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
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#ifndef AVCODEC_DV_TABLEGEN_H
#define AVCODEC_DV_TABLEGEN_H |
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#include <stdint.h> |
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#include "libavutil/attributes.h" |
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#include "dvdata.h" |
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#if CONFIG_SMALL |
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#define DV_VLC_MAP_RUN_SIZE 15
#define DV_VLC_MAP_LEV_SIZE 23 |
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#else
#define DV_VLC_MAP_RUN_SIZE 64 |
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#define DV_VLC_MAP_LEV_SIZE 512 // FIXME sign was removed so this should be /2 but needs check |
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#endif
/* VLC encoding lookup table */ |
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typedef struct dv_vlc_pair { |
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uint32_t vlc;
uint32_t size; |
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} dv_vlc_pair; |
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#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];
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static av_cold void dv_vlc_map_tableinit(void) |
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{
int i, j;
for (i = 0; i < NB_DV_VLC - 1; i++) { |
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if (ff_dv_vlc_run[i] >= DV_VLC_MAP_RUN_SIZE)
continue; |
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#if CONFIG_SMALL |
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if (ff_dv_vlc_level[i] >= DV_VLC_MAP_LEV_SIZE)
continue; |
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#endif
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if (dv_vlc_map[ff_dv_vlc_run[i]][ff_dv_vlc_level[i]].size != 0)
continue; |
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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]); |
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}
for (i = 0; i < DV_VLC_MAP_RUN_SIZE; i++) {
#if CONFIG_SMALL |
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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;
}
} |
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#else |
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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;
} |
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#endif
}
}
#endif /* CONFIG_HARDCODED_TABLES */
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#endif /* AVCODEC_DV_TABLEGEN_H */ |