repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ba45a60 DM |
1 | /* |
| 2 | * LZW decoder | |
| 3 | * Copyright (c) 2003 Fabrice Bellard | |
| 4 | * Copyright (c) 2006 Konstantin Shishkov | |
| 5 | * | |
| 6 | * This file is part of FFmpeg. | |
| 7 | * | |
| 8 | * FFmpeg is free software; you can redistribute it and/or | |
| 9 | * modify it under the terms of the GNU Lesser General Public | |
| 10 | * License as published by the Free Software Foundation; either | |
| 11 | * version 2.1 of the License, or (at your option) any later version. | |
| 12 | * | |
| 13 | * FFmpeg is distributed in the hope that it will be useful, | |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 16 | * Lesser General Public License for more details. | |
| 17 | * | |
| 18 | * You should have received a copy of the GNU Lesser General Public | |
| 19 | * License along with FFmpeg; if not, write to the Free Software | |
| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| 21 | */ | |
| 22 | ||
| 23 | /** | |
| 24 | * @file | |
| 25 | * @brief LZW decoding routines | |
| 26 | * @author Fabrice Bellard | |
| 27 | * @author modified for use in TIFF by Konstantin Shishkov | |
| 28 | */ | |
| 29 | ||
| 30 | #ifndef AVCODEC_LZW_H | |
| 31 | #define AVCODEC_LZW_H | |
| 32 | ||
| 33 | #include <stdint.h> | |
| 34 | ||
| 35 | struct PutBitContext; | |
| 36 | ||
| 37 | enum FF_LZW_MODES{ | |
| 38 | FF_LZW_GIF, | |
| 39 | FF_LZW_TIFF | |
| 40 | }; | |
| 41 | ||
| 42 | /* clients should not know what LZWState is */ | |
| 43 | typedef void LZWState; | |
| 44 | ||
| 45 | /* first two functions de/allocate memory for LZWState */ | |
| 46 | void ff_lzw_decode_open(LZWState **p); | |
| 47 | void ff_lzw_decode_close(LZWState **p); | |
| 48 | int ff_lzw_decode_init(LZWState *s, int csize, const uint8_t *buf, int buf_size, int mode); | |
| 49 | int ff_lzw_decode(LZWState *s, uint8_t *buf, int len); | |
| 50 | void ff_lzw_decode_tail(LZWState *lzw); | |
| 51 | ||
| 52 | /** LZW encode state */ | |
| 53 | struct LZWEncodeState; | |
| 54 | extern const int ff_lzw_encode_state_size; | |
| 55 | ||
| 56 | void ff_lzw_encode_init(struct LZWEncodeState *s, uint8_t *outbuf, int outsize, | |
| 57 | int maxbits, enum FF_LZW_MODES mode, | |
| 58 | void (*lzw_put_bits)(struct PutBitContext *, int, unsigned int)); | |
| 59 | int ff_lzw_encode(struct LZWEncodeState * s, const uint8_t * inbuf, int insize); | |
| 60 | int ff_lzw_encode_flush(struct LZWEncodeState *s, | |
| 61 | void (*lzw_flush_put_bits)(struct PutBitContext *)); | |
| 62 | ||
| 63 | #endif /* AVCODEC_LZW_H */ |