yading@10: /*
yading@10:  * H261 decoder
yading@10:  * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
yading@10:  * Copyright (c) 2004 Maarten Daniels
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: /**
yading@10:  * @file
yading@10:  * h261codec.
yading@10:  */
yading@10: 
yading@10: #ifndef AVCODEC_H261_H
yading@10: #define AVCODEC_H261_H
yading@10: 
yading@10: #include "mpegvideo.h"
yading@10: #include "rl.h"
yading@10: 
yading@10: /**
yading@10:  * H261Context
yading@10:  */
yading@10: typedef struct H261Context {
yading@10:     MpegEncContext s;
yading@10: 
yading@10:     int current_mba;
yading@10:     int previous_mba;
yading@10:     int mba_diff;
yading@10:     int mtype;
yading@10:     int current_mv_x;
yading@10:     int current_mv_y;
yading@10:     int gob_number;
yading@10:     int gob_start_code_skipped; // 1 if gob start code is already read before gob header is read
yading@10: } H261Context;
yading@10: 
yading@10: #define MB_TYPE_H261_FIL 0x800000
yading@10: 
yading@10: extern uint8_t ff_h261_rl_table_store[2][2 * MAX_RUN + MAX_LEVEL + 3];
yading@10: 
yading@10: extern const uint8_t ff_h261_mba_code[35];
yading@10: extern const uint8_t ff_h261_mba_bits[35];
yading@10: extern const uint8_t ff_h261_mtype_code[10];
yading@10: extern const uint8_t ff_h261_mtype_bits[10];
yading@10: extern const int     ff_h261_mtype_map[10];
yading@10: extern const uint8_t ff_h261_mv_tab[17][2];
yading@10: extern const uint8_t ff_h261_cbp_tab[63][2];
yading@10: extern RLTable ff_h261_rl_tcoeff;
yading@10: 
yading@10: void ff_h261_loop_filter(MpegEncContext *s);
yading@10: void ff_h261_common_init(void);
yading@10: 
yading@10: int ff_h261_get_picture_format(int width, int height);
yading@10: void ff_h261_reorder_mb_index(MpegEncContext *s);
yading@10: void ff_h261_encode_mb(MpegEncContext *s, int16_t block[6][64],
yading@10:                        int motion_x, int motion_y);
yading@10: void ff_h261_encode_picture_header(MpegEncContext *s, int picture_number);
yading@10: void ff_h261_encode_init(MpegEncContext *s);
yading@10: 
yading@10: #endif /* AVCODEC_H261_H */