Libav
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00001 /* 00002 * LZW decoder 00003 * Copyright (c) 2003 Fabrice Bellard 00004 * Copyright (c) 2006 Konstantin Shishkov 00005 * 00006 * This file is part of FFmpeg. 00007 * 00008 * FFmpeg is free software; you can redistribute it and/or 00009 * modify it under the terms of the GNU Lesser General Public 00010 * License as published by the Free Software Foundation; either 00011 * version 2.1 of the License, or (at your option) any later version. 00012 * 00013 * FFmpeg is distributed in the hope that it will be useful, 00014 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00016 * Lesser General Public License for more details. 00017 * 00018 * You should have received a copy of the GNU Lesser General Public 00019 * License along with FFmpeg; if not, write to the Free Software 00020 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00021 */ 00022 00030 #ifndef AVCODEC_LZW_H 00031 #define AVCODEC_LZW_H 00032 00033 #include <stdint.h> 00034 00035 struct PutBitContext; 00036 00037 enum FF_LZW_MODES{ 00038 FF_LZW_GIF, 00039 FF_LZW_TIFF 00040 }; 00041 00042 /* clients should not know what LZWState is */ 00043 typedef void LZWState; 00044 00045 /* first two functions de/allocate memory for LZWState */ 00046 void ff_lzw_decode_open(LZWState **p); 00047 void ff_lzw_decode_close(LZWState **p); 00048 int ff_lzw_decode_init(LZWState *s, int csize, const uint8_t *buf, int buf_size, int mode); 00049 int ff_lzw_decode(LZWState *s, uint8_t *buf, int len); 00050 const uint8_t* ff_lzw_cur_ptr(LZWState *lzw); 00051 void ff_lzw_decode_tail(LZWState *lzw); 00052 00054 struct LZWEncodeState; 00055 extern const int ff_lzw_encode_state_size; 00056 00057 void ff_lzw_encode_init(struct LZWEncodeState *s, uint8_t *outbuf, int outsize, 00058 int maxbits, enum FF_LZW_MODES mode, 00059 void (*lzw_put_bits)(struct PutBitContext *, int, unsigned int)); 00060 int ff_lzw_encode(struct LZWEncodeState * s, const uint8_t * inbuf, int insize); 00061 int ff_lzw_encode_flush(struct LZWEncodeState *s, 00062 void (*lzw_flush_put_bits)(struct PutBitContext *)); 00063 00064 #endif /* AVCODEC_LZW_H */