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/*
FILE...: mpdecode_core.h
AUTHOR.: David Rowe
CREATED: Sep 2016
C-callable core functions for MpDecode, so they can be used for
Octave and C programs. Also some convenience functions to help use
the C-callable LDPC decoder in C programs.
*/
#ifndef __MPDECODE_CORE__
#define __MPDECODE_CORE__
#include <stdint.h>
#include "comp.h"
struct LDPC {
char name[32];
int max_iter;
int dec_type;
int q_scale_factor;
int r_scale_factor;
int CodeLength;
int NumberParityBits;
int NumberRowsHcols;
int max_row_weight;
int max_col_weight;
uint16_t *H_rows;
uint16_t *H_cols;
/* these two are fixed to code params */
int ldpc_data_bits_per_frame;
int ldpc_coded_bits_per_frame;
/* support for partial use of data bits in codeword and unequal protection
* schemes */
int protection_mode;
int data_bits_per_frame;
int coded_bits_per_frame;
};
void encode(struct LDPC *ldpc, unsigned char ibits[], unsigned char pbits[]);
int run_ldpc_decoder(struct LDPC *ldpc, uint8_t out_char[], float input[],
int *parityCheckCount);
void sd_to_llr(float llr[], float sd[], int n);
void Demod2D(float symbol_likelihood[], COMP r[], COMP S_matrix[], float EsNo,
float fading[], float mean_amp, int number_symbols);
void Somap(float bit_likelihood[], float symbol_likelihood[], int M, int bps,
int number_symbols);
void symbols_to_llrs(float llr[], COMP rx_qpsk_symbols[], float rx_amps[],
float EsNo, float mean_amp, int nsyms);
void fsk_rx_filt_to_llrs(float llr[], float rx_filt[], float v_est,
float SNRest, int M, int nsyms);
void ldpc_print_info(struct LDPC *ldpc);
#endif
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