071083b4a5
Now that it is exported, this should avoid confusion and name clashes. Originally committed as revision 14867 to svn://svn.ffmpeg.org/ffmpeg/trunk
60 lines
1.6 KiB
C
60 lines
1.6 KiB
C
/*
|
|
* MPEG1/2 common code
|
|
* Copyright (c) 2007 Aurelien Jacobs <aurel@gnuage.org>
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
#ifndef FFMPEG_MPEG12_H
|
|
#define FFMPEG_MPEG12_H
|
|
|
|
#include "mpegvideo.h"
|
|
|
|
#define DC_VLC_BITS 9
|
|
#define TEX_VLC_BITS 9
|
|
|
|
static VLC dc_lum_vlc;
|
|
static VLC dc_chroma_vlc;
|
|
|
|
extern uint8_t ff_mpeg12_static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3];
|
|
|
|
void ff_mpeg12_common_init(MpegEncContext *s);
|
|
void ff_mpeg12_init_vlcs(void);
|
|
|
|
static inline int decode_dc(GetBitContext *gb, int component)
|
|
{
|
|
int code, diff;
|
|
|
|
if (component == 0) {
|
|
code = get_vlc2(gb, dc_lum_vlc.table, DC_VLC_BITS, 2);
|
|
} else {
|
|
code = get_vlc2(gb, dc_chroma_vlc.table, DC_VLC_BITS, 2);
|
|
}
|
|
if (code < 0){
|
|
av_log(NULL, AV_LOG_ERROR, "invalid dc code at\n");
|
|
return 0xffff;
|
|
}
|
|
if (code == 0) {
|
|
diff = 0;
|
|
} else {
|
|
diff = get_xbits(gb, code);
|
|
}
|
|
return diff;
|
|
}
|
|
|
|
#endif /* FFMPEG_MPEG12_H */
|