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/**
* @file decode.c
*
* @author Mathis Rosenhauer, Deutsches Klimarechenzentrum
* @author Moritz Hanke, Deutsches Klimarechenzentrum
* @author Joerg Behrens, Deutsches Klimarechenzentrum
* @author Luis Kornblueh, Max-Planck-Institut fuer Meteorologie
*
* @section LICENSE
* Copyright 2012 - 2014
*
* Mathis Rosenhauer, Luis Kornblueh
* Moritz Hanke,
* Joerg Behrens
*
* Deutsches Klimarechenzentrum GmbH Max-Planck-Institut fuer Meteorologie
* Bundesstr. 45a Bundesstr. 53
* 20146 Hamburg 20146 Hamburg
* Germany Germany
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*
* @section DESCRIPTION
*
* Adaptive Entropy Decoder
* Based on CCSDS documents 121.0-B-2 and 120.0-G-3
*
*/
#ifndef DECODE_H
#define DECODE_H 1
#if HAVE_STDINT_H
# include <stdint.h>
#endif
#define M_CONTINUE 1
#define M_EXIT 0
#define M_ERROR (-1)
#define MIN(a, b) (((a) < (b))? (a): (b))
struct internal_state {
int (*mode)(struct aec_stream *);
int id; /* option ID */
int id_len; /* bit length of code option identification key */
int (**id_table)(struct aec_stream *); /* table maps IDs to states */
void (*flush_output)(struct aec_stream *);
int64_t last_out; /* previous output for post-processing */
int64_t xmin; /* minimum integer for post-processing */
int64_t xmax; /* maximum integer for post-processing */
int in_blklen; /* length of uncompressed input block
should be the longest possible block */
int out_blklen; /* length of output block in bytes */
int n, i; /* counter for samples */
uint64_t acc; /* accumulator for currently used bit sequence */
int bitp; /* bit pointer to the next unused bit in
accumulator */
int fs; /* last fundamental sequence in accumulator */
int ref; /* 1 if current block has reference sample */
int pp; /* 1 if postprocessor has to be used */
int bytes_per_sample; /* storage size of samples in bytes */
uint32_t *rsi_buffer; /* output buffer holding one reference
sample interval */
uint32_t *rsip; /* current position of output in rsi_buffer */
size_t rsi_size; /* rsi in bytes */
uint32_t *flush_start; /* first not yet flushed byte in rsi_buffer */
int se_table[182]; /* table for decoding second extension option */
} decode_state;
#endif /* DECODE_H */
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