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/*
* LZFSE decoder functions
*
* Copyright (C) 2019-2024, Joachim Metz <joachim.metz@gmail.com>
*
* Refer to AUTHORS for acknowledgements.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* 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.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#if !defined( _LIBFMOS_LZFSE_DECODER_H )
#define _LIBFMOS_LZFSE_DECODER_H
#include <common.h>
#include <types.h>
#include "libfmos_definitions.h"
#include "libfmos_extern.h"
#include "libfmos_libcerror.h"
#include "libfmos_lzfse_bit_stream.h"
#if defined( __cplusplus )
extern "C" {
#endif
typedef struct libfmos_lzfse_decoder_entry libfmos_lzfse_decoder_entry_t;
struct libfmos_lzfse_decoder_entry
{
/* The number of bits
*/
int8_t number_of_bits;
/* The symbol
*/
uint8_t symbol;
/* The delta to compute the next state
*/
int16_t delta;
};
typedef struct libfmos_lzfse_value_decoder_entry libfmos_lzfse_value_decoder_entry_t;
struct libfmos_lzfse_value_decoder_entry
{
/* The (total) number of bits
*/
uint8_t number_of_bits;
/* The value bits
*/
uint8_t value_bits;
/* The delta
*/
int16_t delta;
/* The value base
*/
int32_t value_base;
/* The value bitmask
*/
uint32_t value_bitmask;
};
typedef struct libfmos_lzfse_decoder libfmos_lzfse_decoder_t;
struct libfmos_lzfse_decoder
{
/* The number of literals
*/
uint32_t number_of_literals;
/* The number of L, M, D values
*/
uint32_t number_of_lmd_values;
/* The literals data size
*/
uint32_t literals_data_size;
/* The L, M, D values data size
*/
uint32_t lmd_values_data_size;
/* The literal states
*/
uint16_t literal_states[ 4 ];
/* The L value states
*/
uint16_t l_value_state;
/* The M value states
*/
uint16_t m_value_state;
/* The D value states
*/
uint16_t d_value_state;
/* TODO
*/
int32_t literal_bits;
/* TODO
*/
int32_t lmd_values_bits;
/* The literal decoder table
*/
libfmos_lzfse_decoder_entry_t literal_decoder_table[ LIBFMOS_LZFSE_NUMBER_OF_LITERAL_STATES ];
/* The L value decoder table
*/
libfmos_lzfse_value_decoder_entry_t l_value_decoder_table[ LIBFMOS_LZFSE_NUMBER_OF_L_VALUE_STATES ];
/* The M value decoder table
*/
libfmos_lzfse_value_decoder_entry_t m_value_decoder_table[ LIBFMOS_LZFSE_NUMBER_OF_M_VALUE_STATES ];
/* The D value decoder table
*/
libfmos_lzfse_value_decoder_entry_t d_value_decoder_table[ LIBFMOS_LZFSE_NUMBER_OF_D_VALUE_STATES ];
};
int libfmos_lzfse_decoder_initialize(
libfmos_lzfse_decoder_t **decoder,
libcerror_error_t **error );
int libfmos_lzfse_decoder_free(
libfmos_lzfse_decoder_t **decoder,
libcerror_error_t **error );
#if defined( __cplusplus )
}
#endif
#endif /* !defined( _LIBFMOS_LZFSE_DECODER_H ) */
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