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84 lines
2.3 KiB
C
84 lines
2.3 KiB
C
/*
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* FITS image format common prototypes and structures
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* Copyright (c) 2017 Paras Chadha
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVCODEC_FITS_H
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#define AVCODEC_FITS_H
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#include <inttypes.h>
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#include "libavutil/dict.h"
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typedef enum FITSHeaderState {
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STATE_SIMPLE,
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STATE_XTENSION,
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STATE_BITPIX,
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STATE_NAXIS,
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STATE_NAXIS_N,
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STATE_PCOUNT,
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STATE_GCOUNT,
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STATE_REST,
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} FITSHeaderState;
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/**
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* Structure to store the header keywords in FITS file
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*/
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typedef struct FITSHeader {
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FITSHeaderState state;
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unsigned naxis_index;
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int bitpix;
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int64_t blank;
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int blank_found;
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int naxis;
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int naxisn[999];
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int pcount;
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int gcount;
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int groups;
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int rgb; /**< 1 if file contains RGB image, 0 otherwise */
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int image_extension;
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double bscale;
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double bzero;
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int data_min_found;
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double data_min;
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int data_max_found;
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double data_max;
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} FITSHeader;
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/**
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* Initialize a single header line
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* @param header pointer to the header
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* @param state current state of parsing the header
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* @return 0 if successful otherwise AVERROR_INVALIDDATA
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*/
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int avpriv_fits_header_init(FITSHeader *header, FITSHeaderState state);
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/**
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* Parse a single header line
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* @param avcl used in av_log
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* @param header pointer to the header
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* @param line one header line
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* @param metadata used to store metadata while decoding
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* @return 0 if successful otherwise AVERROR_INVALIDDATA
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*/
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int avpriv_fits_header_parse_line(void *avcl, FITSHeader *header, const uint8_t line[80], AVDictionary ***metadata);
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#endif /* AVCODEC_FITS_H */
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