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