/* * 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 */