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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * LZW decoder |
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| 3 | * Copyright (c) 2003 Fabrice Bellard |
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| 4 | * Copyright (c) 2006 Konstantin Shishkov |
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| 5 | * |
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| 6 | * This file is part of FFmpeg. |
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| 7 | * |
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| 8 | * FFmpeg is free software; you can redistribute it and/or |
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| 9 | * modify it under the terms of the GNU Lesser General Public |
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| 10 | * License as published by the Free Software Foundation; either |
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| 11 | * version 2.1 of the License, or (at your option) any later version. |
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| 12 | * |
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| 13 | * FFmpeg is distributed in the hope that it will be useful, |
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| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 16 | * Lesser General Public License for more details. |
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| 17 | * |
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| 18 | * You should have received a copy of the GNU Lesser General Public |
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| 19 | * License along with FFmpeg; if not, write to the Free Software |
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| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 21 | */ |
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| 22 | |||
| 23 | /** |
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| 24 | * @file |
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| 25 | * @brief LZW decoding routines |
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| 26 | * @author Fabrice Bellard |
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| 27 | * @author modified for use in TIFF by Konstantin Shishkov |
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| 28 | */ |
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| 29 | |||
| 30 | #ifndef AVCODEC_LZW_H |
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| 31 | #define AVCODEC_LZW_H |
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| 32 | |||
| 33 | #include |
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| 34 | |||
| 35 | struct PutBitContext; |
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| 36 | |||
| 37 | enum FF_LZW_MODES{ |
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| 38 | FF_LZW_GIF, |
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| 39 | FF_LZW_TIFF |
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| 40 | }; |
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| 41 | |||
| 42 | /* clients should not know what LZWState is */ |
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| 43 | typedef void LZWState; |
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| 44 | |||
| 45 | /* first two functions de/allocate memory for LZWState */ |
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| 46 | void ff_lzw_decode_open(LZWState **p); |
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| 47 | void ff_lzw_decode_close(LZWState **p); |
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| 48 | int ff_lzw_decode_init(LZWState *s, int csize, const uint8_t *buf, int buf_size, int mode); |
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| 49 | int ff_lzw_decode(LZWState *s, uint8_t *buf, int len); |
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| 50 | void ff_lzw_decode_tail(LZWState *lzw); |
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| 51 | |||
| 52 | /** LZW encode state */ |
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| 53 | struct LZWEncodeState; |
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| 54 | extern const int ff_lzw_encode_state_size; |
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| 55 | |||
| 56 | void ff_lzw_encode_init(struct LZWEncodeState *s, uint8_t *outbuf, int outsize, |
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| 57 | int maxbits, enum FF_LZW_MODES mode, |
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| 58 | void (*lzw_put_bits)(struct PutBitContext *, int, unsigned int)); |
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| 59 | int ff_lzw_encode(struct LZWEncodeState * s, const uint8_t * inbuf, int insize); |
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| 60 | int ff_lzw_encode_flush(struct LZWEncodeState *s, |
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| 61 | void (*lzw_flush_put_bits)(struct PutBitContext *)); |
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| 62 | |||
| 63 | #endif /* AVCODEC_LZW_H */ |