79 lines
2.0 KiB
C
79 lines
2.0 KiB
C
/*
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* Copyright (C) 2014 Andreas Steffen
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*
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* Copyright (C) secunet Security Networks AG
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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/**
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* @defgroup bliss_huffman_coder bliss_huffman_coder
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* @{ @ingroup bliss_p
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*/
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#ifndef BLISS_HUFFMAN_CODER_H_
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#define BLISS_HUFFMAN_CODER_H_
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#include "bliss_huffman_code.h"
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#include "bliss_bitpacker.h"
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#include <library.h>
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typedef struct bliss_huffman_coder_t bliss_huffman_coder_t;
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/**
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* Encodes and decodes binary Huffman codes
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*/
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struct bliss_huffman_coder_t {
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/**
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* Get number of encoded or decoded bits
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*
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* @result Number of bits
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*/
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size_t (*get_bits)(bliss_huffman_coder_t *this);
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/**
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* Encode a (z1, z2) tuple using a Huffman code
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*
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* @param z1 z1 value to be encoded
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* @param z2 z2 value to be encoded
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* @result TRUE if value could be encoded
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*/
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bool (*encode)(bliss_huffman_coder_t *this, int32_t z1, int16_t z2);
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/**
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* Decode a (z1, z2) tuple using a Huffman code
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*
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* @param z1 Decoded z1 value returned
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* @param z2 Decoded z2 value returned
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* @result TRUE if value could be decoded from bitpacker
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*/
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bool (*decode)(bliss_huffman_coder_t *this, int32_t *z1, int16_t *z2);
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/**
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* Destroy bliss_huffman_coder_t object
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*/
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void (*destroy)(bliss_huffman_coder_t *this);
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};
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/**
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* Create a bliss_huffman_coder_t object
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*
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* @param code Huffman code table
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* @param packer Bitpacker to write to or read from
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*/
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bliss_huffman_coder_t* bliss_huffman_coder_create(bliss_huffman_code_t *code,
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bliss_bitpacker_t *packer);
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#endif /** BLISS_HUFFMAN_CODER_H_ @}*/
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