/* * LZW decoder * Copyright (c) 2003 Fabrice Bellard * Copyright (c) 2006 Konstantin Shishkov * * This file is part of FFmpeg. * * FFmpeg 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. * * FFmpeg 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 FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * @file * @brief LZW decoding routines * @author Fabrice Bellard * @author modified for use in TIFF by Konstantin Shishkov */ #ifndef AVCODEC_LZW_H #define AVCODEC_LZW_H #include <stdint.h> struct PutBitContext; enum FF_LZW_MODES{ FF_LZW_GIF, FF_LZW_TIFF }; /* clients should not know what LZWState is */ typedef void LZWState; /* first two functions de/allocate memory for LZWState */ void ff_lzw_decode_open(LZWState **p); void ff_lzw_decode_close(LZWState **p); int ff_lzw_decode_init(LZWState *s, int csize, const uint8_t *buf, int buf_size, int mode); int ff_lzw_decode(LZWState *s, uint8_t *buf, int len); const uint8_t* ff_lzw_cur_ptr(LZWState *lzw); void ff_lzw_decode_tail(LZWState *lzw); /** LZW encode state */ struct LZWEncodeState; extern const int ff_lzw_encode_state_size; void ff_lzw_encode_init(struct LZWEncodeState *s, uint8_t *outbuf, int outsize, int maxbits, enum FF_LZW_MODES mode, void (*lzw_put_bits)(struct PutBitContext *, int, unsigned int)); int ff_lzw_encode(struct LZWEncodeState * s, const uint8_t * inbuf, int insize); int ff_lzw_encode_flush(struct LZWEncodeState *s, void (*lzw_flush_put_bits)(struct PutBitContext *)); #endif /* AVCODEC_LZW_H */