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