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/*
* MPEG-1/2 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 "mpeg12vlc.h"
#include "mpegvideo.h"
/* Start codes. */
#define SEQ_END_CODE 0x000001b7
#define SEQ_START_CODE 0x000001b3
#define GOP_START_CODE 0x000001b8
#define PICTURE_START_CODE 0x00000100
#define SLICE_MIN_START_CODE 0x00000101
#define SLICE_MAX_START_CODE 0x000001af
#define EXT_START_CODE 0x000001b5
#define USER_START_CODE 0x000001b2
void ff_mpeg12_common_init(MpegEncContext *s);
#define INIT_2D_VLC_RL(rl, static_size, flags)\
{\
static RL_VLC_ELEM rl_vlc_table[static_size];\
rl.rl_vlc[0] = rl_vlc_table;\
ff_init_2d_vlc_rl(&rl, static_size, flags);\
}
void ff_init_2d_vlc_rl(RLTable *rl, unsigned static_size, int flags);
void ff_mpeg1_init_uni_ac_vlc(const RLTable *rl, uint8_t *uni_ac_vlc_len);
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) {
diff = 0;
} else {
diff = get_xbits(gb, code);
}
return diff;
}
int ff_mpeg1_decode_block_intra(GetBitContext *gb,
const uint16_t *quant_matrix,
uint8_t *const scantable, int last_dc[3],
int16_t *block, int index, int qscale);
void ff_mpeg1_clean_buffers(MpegEncContext *s);
#if FF_API_FLAG_TRUNCATED
int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size, AVCodecParserContext *s);
#endif
void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number);
void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[8][64],
int motion_x, int motion_y);
void ff_mpeg1_encode_init(MpegEncContext *s);
void ff_mpeg1_encode_slice_header(MpegEncContext *s);
void ff_mpeg12_find_best_frame_rate(AVRational frame_rate,
int *code, int *ext_n, int *ext_d,
int nonstandard);
#endif /* AVCODEC_MPEG12_H */
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