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52 lines
1.3 KiB
C
52 lines
1.3 KiB
C
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/*
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FILE...: mpdecode_core.h
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AUTHOR.: David Rowe
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CREATED: Sep 2016
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C-callable core functions for MpDecode, so they can be used for
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Octave and C programs. Also some convenience functions to help use
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the C-callable LDPC decoder in C programs.
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*/
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#ifndef __MPDECODE_CORE__
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#define __MPDECODE_CORE__
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#include <stdint.h>
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#include "codec2/comp.h"
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namespace FreeDV
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{
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struct LDPC {
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int max_iter;
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int dec_type;
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int q_scale_factor;
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int r_scale_factor;
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int CodeLength;
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int NumberParityBits;
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int NumberRowsHcols;
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int max_row_weight;
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int max_col_weight;
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int data_bits_per_frame;
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int coded_bits_per_frame;
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int coded_syms_per_frame;
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uint16_t *H_rows;
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uint16_t *H_cols;
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};
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void encode(struct LDPC *ldpc, unsigned char ibits[], unsigned char pbits[]);
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int run_ldpc_decoder(struct LDPC *ldpc, uint8_t out_char[], float input[], int *parityCheckCount);
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void sd_to_llr(float llr[], double sd[], int n);
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void Demod2D(float symbol_likelihood[], COMP r[], COMP S_matrix[], float EsNo, float fading[], float mean_amp, int number_symbols);
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void Somap(float bit_likelihood[], float symbol_likelihood[], int number_symbols);
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void symbols_to_llrs(float llr[], COMP rx_qpsk_symbols[], float rx_amps[], float EsNo, float mean_amp, int nsyms);
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void ldpc_print_info(struct LDPC *ldpc);
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} // FreeDV
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#endif
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