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/*
* FITS image format common prototypes and structures
* Copyright (c) 2017 Paras Chadha
*
* This file is part of FFmpeg.
*
* FFmpeg 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 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_FITS_H
#define AVCODEC_FITS_H
#include <inttypes.h>
#include "libavutil/dict.h"
typedef enum FITSHeaderState {
STATE_SIMPLE,
STATE_XTENSION,
STATE_BITPIX,
STATE_NAXIS,
STATE_NAXIS_N,
STATE_PCOUNT,
STATE_GCOUNT,
STATE_REST,
} FITSHeaderState;
/**
* Structure to store the header keywords in FITS file
*/
typedef struct FITSHeader {
FITSHeaderState state;
unsigned naxis_index;
int bitpix;
int64_t blank;
int blank_found;
int naxis;
int naxisn[999];
int pcount;
int gcount;
int groups;
int rgb; /**< 1 if file contains RGB image, 0 otherwise */
int image_extension;
double bscale;
double bzero;
int data_min_found;
double data_min;
int data_max_found;
double data_max;
} FITSHeader;
/**
* Initialize a single header line
* @param header pointer to the header
* @param state current state of parsing the header
* @return 0 if successful otherwise AVERROR_INVALIDDATA
*/
int avpriv_fits_header_init(FITSHeader *header, FITSHeaderState state);
/**
* Parse a single header line
* @param avcl used in av_log
* @param header pointer to the header
* @param line one header line
* @param metadata used to store metadata while decoding
* @return 0 if successful otherwise AVERROR_INVALIDDATA
*/
int avpriv_fits_header_parse_line(void *avcl, FITSHeader *header, const uint8_t line[80], AVDictionary ***metadata);
#endif /* AVCODEC_FITS_H */
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