| /* |
| * 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 libavcodec/lzw.h |
| * @brief LZW decoding routines |
| * @author Fabrice Bellard |
| * Modified for use in TIFF by Konstantin Shishkov |
| */ |
| |
| #ifndef AVCODEC_LZW_H |
| #define AVCODEC_LZW_H |
| |
| #include "bitstream.h" |
| |
| 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); |
| int ff_lzw_encode(struct LZWEncodeState * s, const uint8_t * inbuf, int insize); |
| int ff_lzw_encode_flush(struct LZWEncodeState * s); |
| |
| #endif /* AVCODEC_LZW_H */ |