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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_code bliss_huffman_code
* @{ @ingroup bliss_p
*/
#ifndef BLISS_HUFFMAN_CODE_H_
#define BLISS_HUFFMAN_CODE_H_
#include "bliss_param_set.h"
#include <library.h>
typedef struct bliss_huffman_code_t bliss_huffman_code_t;
typedef struct bliss_huffman_code_tuple_t bliss_huffman_code_tuple_t;
typedef struct bliss_huffman_code_node_t bliss_huffman_code_node_t;
struct bliss_huffman_code_tuple_t {
uint32_t code;
uint16_t bits;
};
#define BLISS_HUFFMAN_CODE_NO_TUPLE -1
#define BLISS_HUFFMAN_CODE_NO_NODE -1
struct bliss_huffman_code_node_t {
int16_t node_0;
int16_t node_1;
int16_t tuple;
};
/**
* Defines the Huffman code for the optimum encoding of a BLISS signature
*/
struct bliss_huffman_code_t {
/**
* Range of z1: 0..n_z1-1
*/
uint16_t n_z1;
/**
* Range of z2: -n_z2..n_z2
*/
uint16_t n_z2;
/**
* Table of tuple codewords
*/
bliss_huffman_code_tuple_t *tuples;
/**
* Table of binary decision nodes
*/
bliss_huffman_code_node_t *nodes;
};
/**
* Get Optimum Huffman code for BLISS signature given by BLISS parameter set ID
*
* @param id BLISS parameter set ID
* @return Optimum Huffman code for BLISS signature
*/
bliss_huffman_code_t* bliss_huffman_code_get_by_id(bliss_param_set_id_t id);
#endif /** BLISS_HUFFMAN_CODE_H_ @}*/
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