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1.1 misho 1: /* 2: * Copyright (C) 2014 Andreas Steffen 3: * HSR Hochschule fuer Technik Rapperswil 4: * 5: * This program is free software; you can redistribute it and/or modify it 6: * under the terms of the GNU General Public License as published by the 7: * Free Software Foundation; either version 2 of the License, or (at your 8: * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. 9: * 10: * This program is distributed in the hope that it will be useful, but 11: * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 12: * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13: * for more details. 14: */ 15: 16: /** 17: * @defgroup bliss_huffman_coder bliss_huffman_coder 18: * @{ @ingroup bliss_p 19: */ 20: 21: #ifndef BLISS_HUFFMAN_CODER_H_ 22: #define BLISS_HUFFMAN_CODER_H_ 23: 24: #include "bliss_huffman_code.h" 25: #include "bliss_bitpacker.h" 26: 27: #include <library.h> 28: 29: typedef struct bliss_huffman_coder_t bliss_huffman_coder_t; 30: 31: /** 32: * Encodes and decodes binary Huffman codes 33: */ 34: struct bliss_huffman_coder_t { 35: 36: /** 37: * Get number of encoded or decoded bits 38: * 39: * @result Number of bits 40: */ 41: size_t (*get_bits)(bliss_huffman_coder_t *this); 42: 43: /** 44: * Encode a (z1, z2) tuple using a Huffman code 45: * 46: * @param z1 z1 value to be encoded 47: * @param z2 z2 value to be encoded 48: * @result TRUE if value could be encoded 49: */ 50: bool (*encode)(bliss_huffman_coder_t *this, int32_t z1, int16_t z2); 51: 52: 53: /** 54: * Decode a (z1, z2) tuple using a Huffman code 55: * 56: * @param z1 Decoded z1 value returned 57: * @param z2 Decoded z2 value returned 58: * @result TRUE if value could be decoded from bitpacker 59: */ 60: bool (*decode)(bliss_huffman_coder_t *this, int32_t *z1, int16_t *z2); 61: 62: /** 63: * Destroy bliss_huffman_coder_t object 64: */ 65: void (*destroy)(bliss_huffman_coder_t *this); 66: }; 67: 68: /** 69: * Create a bliss_huffman_coder_t object 70: * 71: * @param code Huffman code table 72: * @param packer Bitpacker to write to or read from 73: */ 74: bliss_huffman_coder_t* bliss_huffman_coder_create(bliss_huffman_code_t *code, 75: bliss_bitpacker_t *packer); 76: 77: #endif /** BLISS_HUFFMAN_CODER_H_ @}*/