3 * Copyright (c) 2007 Aurelien Jacobs <aurel@gnuage.org>
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #ifndef AVCODEC_MPEG12_H
23 #define AVCODEC_MPEG12_H
25 #include "mpegvideo.h"
29 #define TEX_VLC_BITS 9
31 #define MBINCR_VLC_BITS 9
32 #define MB_PAT_VLC_BITS 9
33 #define MB_PTYPE_VLC_BITS 6
34 #define MB_BTYPE_VLC_BITS 6
36 extern VLC ff_dc_lum_vlc
;
37 extern VLC ff_dc_chroma_vlc
;
38 extern VLC ff_mbincr_vlc
;
39 extern VLC ff_mb_ptype_vlc
;
40 extern VLC ff_mb_btype_vlc
;
41 extern VLC ff_mb_pat_vlc
;
44 extern uint8_t ff_mpeg12_static_rl_table_store
[2][2][2*MAX_RUN
+ MAX_LEVEL
+ 3];
46 void ff_mpeg12_common_init(MpegEncContext
*s
);
47 void ff_mpeg12_init_vlcs(void);
49 static inline int decode_dc(GetBitContext
*gb
, int component
)
54 code
= get_vlc2(gb
, ff_dc_lum_vlc
.table
, DC_VLC_BITS
, 2);
56 code
= get_vlc2(gb
, ff_dc_chroma_vlc
.table
, DC_VLC_BITS
, 2);
59 av_log(NULL
, AV_LOG_ERROR
, "invalid dc code at\n");
65 diff
= get_xbits(gb
, code
);
70 int ff_mpeg1_decode_block_intra(MpegEncContext
*s
, int16_t *block
, int n
);
71 void ff_mpeg1_clean_buffers(MpegEncContext
*s
);
72 int ff_mpeg1_find_frame_end(ParseContext
*pc
, const uint8_t *buf
, int buf_size
, AVCodecParserContext
*s
);
74 #endif /* AVCODEC_MPEG12_H */