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ffmpeg / libavcodec / lzw.h @ 2912e87a

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/*
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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 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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 * @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 AVCODEC_LZW_H
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#define AVCODEC_LZW_H
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#include <stdint.h>
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struct PutBitContext;
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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, const 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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const 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,
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                        int maxbits, enum FF_LZW_MODES mode,
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                        void (*lzw_put_bits)(struct PutBitContext *, int, unsigned int));
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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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                        void (*lzw_flush_put_bits)(struct PutBitContext *));
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#endif /* AVCODEC_LZW_H */