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/**
* @file encode.h
*
* @section LICENSE
* Copyright 2012 - 2016
*
* Mathis Rosenhauer, Moritz Hanke, Joerg Behrens
* Deutsches Klimarechenzentrum GmbH
* Bundesstr. 45a
* 20146 Hamburg Germany
*
* Luis Kornblueh
* Max-Planck-Institut fuer Meteorologie
* Bundesstr. 53
* 20146 Hamburg
* 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 Encoder
* Based on CCSDS documents 121.0-B-2 and 120.0-G-3
*
*/
#ifndef ENCODE_H
#define ENCODE_H 1
#include <config.h>
#if HAVE_STDINT_H
# include <stdint.h>
#endif
#define M_CONTINUE 1
#define M_EXIT 0
#define MIN(a, b) (((a) < (b))? (a): (b))
/* Maximum CDS length in bytes: 5 bits ID, 64 * 32 bits samples, 7
* bits carry from previous CDS */
#define CDSLEN ((5 + 64 * 32 + 7 + 7) / 8)
/* Marker for Remainder Of Segment condition in zero block encoding */
#define ROS -1
struct aec_stream;
struct internal_state {
int (*mode)(struct aec_stream *);
uint32_t (*get_sample)(struct aec_stream *);
void (*get_rsi)(struct aec_stream *);
void (*preprocess)(struct aec_stream *);
/* bit length of code option identification key */
int id_len;
/* minimum integer for preprocessing */
uint32_t xmin;
/* maximum integer for preprocessing */
uint32_t xmax;
uint32_t i;
/* RSI blocks of preprocessed input */
uint32_t *data_pp;
/* RSI blocks of input */
uint32_t *data_raw;
/* remaining blocks in buffer */
int blocks_avail;
/* blocks encoded so far in RSI */
int blocks_dispensed;
/* current (preprocessed) input block */
uint32_t *block;
/* reference sample interval in byte */
uint32_t rsi_len;
/* current Coded Data Set output */
uint8_t *cds;
/* buffer for one CDS (only used if strm->next_out cannot hold
* full CDS) */
uint8_t cds_buf[CDSLEN];
/* cds points to strm->next_out (1) or cds_buf (0) */
int direct_out;
/* Free bits (LSB) in output buffer or accumulator */
int bits;
/* length of reference sample in current block i.e. 0 or 1
* depending on whether the block has a reference sample or not */
int ref;
/* reference sample stored here for performance reasons */
uint32_t ref_sample;
/* current zero block has a reference sample */
int zero_ref;
/* reference sample of zero block */
uint32_t zero_ref_sample;
/* storage size of samples in bytes */
uint32_t bytes_per_sample;
/* number of contiguous zero blocks */
int zero_blocks;
/* 1 if this is the first non-zero block after one or more zero
* blocks */
int block_nonzero;
/* splitting position */
int k;
/* maximum number for k depending on id_len */
int kmax;
/* flush option copied from argument */
int flush;
/* 1 if flushing was successful */
int flushed;
/* length of uncompressed CDS */
uint32_t uncomp_len;
};
#endif /* ENCODE_H */
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