59 lines
2.1 KiB
C
59 lines
2.1 KiB
C
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#ifndef P25P1_CHECK_LDU_H_c1734445a67e47caa25673d7a4ce7520
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#define P25P1_CHECK_LDU_H_c1734445a67e47caa25673d7a4ce7520
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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 error correct a hex (6-bit) word using the Hamming(10,6,3) FEC.
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* \param hex The 6-bit word to error correct.
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* \param parity The parity to use in the error correction. 4 bits.
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* \return The estimated error count. It might be erroneous.
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*/
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int check_and_fix_hamming_10_6_3(char* hex, char* parity);
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/**
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* Encodes an hex word with the Hamming(10,6,3) FEC.
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* \param hex The 6-bit word to error correct.
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* \param out_parity The address where to store the calculated parity. 4 bytes are used, one for each bit.
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*/
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void encode_hamming_10_6_3(char* hex, char* out_parity);
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/**
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* Attempts to correct 12 hex words using the Reed-Solomon(24,12,13) 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 12 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_reedsolomon_24_12_13(char* data, char* parity);
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/**
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* Encodes 12 hex words with the Reed-Solomon(24,12,13) FEC.
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* \param hex_data The packed 12 hex words to encode.
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* \fixed_parity The address were to store the 12 hex words with the Reed-Solomon parity.
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*/
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void encode_reedsolomon_24_12_13(char* hex_data, char* fixed_parity);
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/**
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* Attempts to correct 16 hex words using the Reed-Solomon(24,16,9) FEC.
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* \param data The packed 16 hex words, each of 6 chars, one after the other.
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* \param parity The corresponding 8 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_reedsolomon_24_16_9(char* data, char* parity);
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/**
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* Encodes 12 hex words with the Reed-Solomon(24,16,9) FEC.
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* \param hex_data The packed 16 hex words to encode.
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* \fixed_parity The address were to store the 8 hex words with the Reed-Solomon parity.
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*/
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void encode_reedsolomon_24_16_9(char* hex_data, char* fixed_parity);
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#ifdef __cplusplus
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}
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#endif
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#endif // P25P1_CHECK_LDU_H_c1734445a67e47caa25673d7a4ce7520
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