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59 lines
1.9 KiB
59 lines
1.9 KiB
/* |
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* LZW decoder |
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* Copyright (c) 2003 Fabrice Bellard. |
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* Copyright (c) 2006 Konstantin Shishkov. |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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 lzw.h |
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* @brief LZW decoding routines |
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* @author Fabrice Bellard |
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* Modified for use in TIFF by Konstantin Shishkov |
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*/ |
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#ifndef FFMPEG_LZW_H |
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#define FFMPEG_LZW_H |
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#include "bitstream.h" |
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enum FF_LZW_MODES{ |
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FF_LZW_GIF, |
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FF_LZW_TIFF |
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}; |
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/* clients should not know what LZWState is */ |
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typedef void LZWState; |
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/* first two functions de/allocate memory for LZWState */ |
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void ff_lzw_decode_open(LZWState **p); |
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void ff_lzw_decode_close(LZWState **p); |
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int ff_lzw_decode_init(LZWState *s, int csize, uint8_t *buf, int buf_size, int mode); |
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int ff_lzw_decode(LZWState *s, uint8_t *buf, int len); |
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uint8_t* ff_lzw_cur_ptr(LZWState *lzw); |
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void ff_lzw_decode_tail(LZWState *lzw); |
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/** LZW encode state */ |
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struct LZWEncodeState; |
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extern const int ff_lzw_encode_state_size; |
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void ff_lzw_encode_init(struct LZWEncodeState * s, uint8_t * outbuf, int outsize, int maxbits); |
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int ff_lzw_encode(struct LZWEncodeState * s, const uint8_t * inbuf, int insize); |
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int ff_lzw_encode_flush(struct LZWEncodeState * s); |
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#endif /* FFMPEG_LZW_H */
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