mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-30 19:32:13 +00:00
74 lines
2.2 KiB
C
74 lines
2.2 KiB
C
/*
|
|
* H261 decoder
|
|
* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
|
|
* Copyright (c) 2004 Maarten Daniels
|
|
*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav 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.
|
|
*
|
|
* Libav 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 Libav; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* h261codec.
|
|
*/
|
|
|
|
#ifndef AVCODEC_H261_H
|
|
#define AVCODEC_H261_H
|
|
|
|
#include "mpegvideo.h"
|
|
#include "rl.h"
|
|
|
|
/**
|
|
* H261Context
|
|
*/
|
|
typedef struct H261Context {
|
|
MpegEncContext s;
|
|
|
|
int current_mba;
|
|
int previous_mba;
|
|
int mba_diff;
|
|
int mtype;
|
|
int current_mv_x;
|
|
int current_mv_y;
|
|
int gob_number;
|
|
int gob_start_code_skipped; // 1 if gob start code is already read before gob header is read
|
|
} H261Context;
|
|
|
|
#define MB_TYPE_H261_FIL 0x800000
|
|
|
|
extern uint8_t ff_h261_rl_table_store[2][2 * MAX_RUN + MAX_LEVEL + 3];
|
|
|
|
extern const uint8_t ff_h261_mba_code[35];
|
|
extern const uint8_t ff_h261_mba_bits[35];
|
|
extern const uint8_t ff_h261_mtype_code[10];
|
|
extern const uint8_t ff_h261_mtype_bits[10];
|
|
extern const int ff_h261_mtype_map[10];
|
|
extern const uint8_t ff_h261_mv_tab[17][2];
|
|
extern const uint8_t ff_h261_cbp_tab[63][2];
|
|
extern RLTable ff_h261_rl_tcoeff;
|
|
|
|
void ff_h261_loop_filter(MpegEncContext *s);
|
|
void ff_h261_common_init(void);
|
|
|
|
int ff_h261_get_picture_format(int width, int height);
|
|
void ff_h261_reorder_mb_index(MpegEncContext *s);
|
|
void ff_h261_encode_mb(MpegEncContext *s, int16_t block[6][64],
|
|
int motion_x, int motion_y);
|
|
void ff_h261_encode_picture_header(MpegEncContext *s, int picture_number);
|
|
void ff_h261_encode_init(MpegEncContext *s);
|
|
|
|
#endif /* AVCODEC_H261_H */
|