mirror of
https://git.videolan.org/git/ffmpeg.git
synced 2024-07-16 01:11:38 +02:00
2bfcd74ad3
* commit 'e557584aa7df6ac9f52af7ee7e5c963437da2e2f': mpeg12: Move Mpeg1Context declaration to the only place it is used Conflicts: libavcodec/mpeg12.h libavcodec/mpeg12dec.c Merged-by: Michael Niedermayer <michaelni@gmx.at>
75 lines
2.1 KiB
C
75 lines
2.1 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 AVCODEC_MPEG12_H
|
|
#define AVCODEC_MPEG12_H
|
|
|
|
#include "mpegvideo.h"
|
|
|
|
#define DC_VLC_BITS 9
|
|
#define MV_VLC_BITS 9
|
|
#define TEX_VLC_BITS 9
|
|
|
|
#define MBINCR_VLC_BITS 9
|
|
#define MB_PAT_VLC_BITS 9
|
|
#define MB_PTYPE_VLC_BITS 6
|
|
#define MB_BTYPE_VLC_BITS 6
|
|
|
|
extern VLC ff_dc_lum_vlc;
|
|
extern VLC ff_dc_chroma_vlc;
|
|
extern VLC ff_mbincr_vlc;
|
|
extern VLC ff_mb_ptype_vlc;
|
|
extern VLC ff_mb_btype_vlc;
|
|
extern VLC ff_mb_pat_vlc;
|
|
extern VLC ff_mv_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, ff_dc_lum_vlc.table, DC_VLC_BITS, 2);
|
|
} else {
|
|
code = get_vlc2(gb, ff_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;
|
|
}
|
|
|
|
int ff_mpeg1_decode_block_intra(MpegEncContext *s, int16_t *block, int n);
|
|
void ff_mpeg1_clean_buffers(MpegEncContext *s);
|
|
int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size, AVCodecParserContext *s);
|
|
|
|
#endif /* AVCODEC_MPEG12_H */
|