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/*
* 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
*/
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#ifndef AVCODEC_MPEG12_H
#define AVCODEC_MPEG12_H |
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#include "mpegvideo.h"
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#define DC_VLC_BITS 9 |
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#define MV_VLC_BITS 9 |
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#define TEX_VLC_BITS 9
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#define MBINCR_VLC_BITS 9
#define MB_PAT_VLC_BITS 9
#define MB_PTYPE_VLC_BITS 6
#define MB_BTYPE_VLC_BITS 6
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extern VLC ff_dc_lum_vlc;
extern VLC ff_dc_chroma_vlc; |
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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; |
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extern uint8_t ff_mpeg12_static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3];
void ff_mpeg12_common_init(MpegEncContext *s); |
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void ff_mpeg12_init_vlcs(void); |
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static inline int decode_dc(GetBitContext *gb, int component)
{
int code, diff;
if (component == 0) { |
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code = get_vlc2(gb, ff_dc_lum_vlc.table, DC_VLC_BITS, 2); |
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} else { |
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code = get_vlc2(gb, ff_dc_chroma_vlc.table, DC_VLC_BITS, 2); |
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}
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;
} |
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int ff_mpeg1_decode_block_intra(MpegEncContext *s, int16_t *block, int n); |
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void ff_mpeg1_clean_buffers(MpegEncContext *s);
int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size, AVCodecParserContext *s); |
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#endif /* AVCODEC_MPEG12_H */ |