kopia lustrzana https://github.com/cyoung/stratux
45 wiersze
1.7 KiB
C
45 wiersze
1.7 KiB
C
//
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// Copyright 2015, Oliver Jowett <oliver@mutability.co.uk>
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//
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// This file is free software: you may copy, redistribute and/or modify it
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// under the terms of the GNU General Public License as published by the
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// Free Software Foundation, either version 2 of the License, or (at your
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// option) any later version.
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//
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// This file is distributed in the hope that it will be useful, but
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// 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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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#ifndef DUMP978_FEC_H
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#define DUMP978_FEC_H
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/* Initialize. Must be called once before correct_* */
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void init_fec(void);
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/* Correct a downlink frame.
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*
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* 'to' should contain LONG_FRAME_BYTES of data.
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* Errors are corrected in-place within 'to'.
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* Returns -1 on uncorrectable errors, 1 for a valid basic frame, 2 for a valid long frame.
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* Sets *rs_errors to the number of corrected errors, or 9999 if uncorrectable.
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*/
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int correct_adsb_frame(uint8_t *to, int *rs_errors);
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/* Deinterleave and correct an uplink frame.
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*
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* 'from' should point to UPLINK_FRAME_BYTES of interleaved input data
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* 'to' should point to UPLINK_FRAME_BYTES of space for output data
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* (only the first UPLINK_FRAME_DATA_BYTES will contain useful data)
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* Blocks are deinterleaved and corrected, and written to 'to'.
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* Returns -1 on uncorrectable errors, 1 for a valid uplink frame.
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* Sets *rs_errors to the number of corrected errors, or 9999 if uncorrectable.
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*/
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int correct_uplink_frame(uint8_t *from, uint8_t *to, int *rs_errors);
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#endif
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