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https://github.com/lwvmobile/dsd-fme.git
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01a2b6959a
Refactored implementation of p25p1_ldu1.c and p25p1_ldu2.c. There are less duplicities now and hopefully is easier to read and maintain. Added a unit test for the Hamming algorithm.
30 lines
1.0 KiB
C
30 lines
1.0 KiB
C
#ifndef __P25P1_CHECK_HDU_H__
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#define __P25P1_CHECK_HDU_H__
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* Attempts to correct an hex (6 bit) word using the Golay(24,12,8) FEC.
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* \param hex The 6 bit word to error correct, given as a char array of 6 elements, each one bit.
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* \param parity A 12 bit word with the Golay parity data, given as a char array of 12 elements.
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* \param fixed_error Output. Filled with the number of errors fixed in the input.
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* \return 1 if there were uncorrectable errors in the input, 0 otherwise.
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*/
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int check_and_fix_golay24(char* hex, char* parity, int* fixed_errors);
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/**
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* Attempts to correct 20 hex words using the Reed-Solomon(36,20,17) FEC.
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* \param data The packed hex words, each of 6 chars, one after the other.
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* \param parity The corresponding 16 hex words with the parity information.
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* \return 1 if irrecoverable errors have been detected, 0 otherwise.
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*/
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int check_and_fix_redsolomon_36_20_17(char* data, char* parity);
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#ifdef __cplusplus
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}
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#endif
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#endif // __P25P1_CHECK_HDU_H__
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