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T-Echo Card audio support initial stages - codec2 attempts

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pelgraine
2026-05-07 05:47:18 +10:00
parent 4b734f1bac
commit 708b96e0e8
109 changed files with 87144 additions and 24 deletions
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lib/codec2_nrf52/src/mpdecode_core.h
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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__
struct LDPC {
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;
double *H_rows;
double *H_cols;
};
int run_ldpc_decoder(struct LDPC *ldpc, char out_char[], double input[]);
void sd_to_llr(double llr[], double sd[], int n);
struct v_node {
int degree;
float initial_value;
int *index; /* the index of a c_node it is connected to */
int *socket; /* socket number at the c_node */
float *message;
int *sign;
};
struct c_node {
int degree;
int *index;
float *message;
int *socket; /* socket number at the v_node */
};
void init_c_v_nodes(struct c_node *c_nodes,
int shift,
int NumberParityBits,
int max_row_weight,
double *H_rows,
int H1,
int CodeLength,
struct v_node *v_nodes,
int NumberRowsHcols,
double *H_cols,
int max_col_weight,
int dec_type,
double *input);
void ApproximateMinStar( int BitErrors[],
int DecodedBits[],
struct c_node c_nodes[],
struct v_node v_nodes[],
int CodeLength,
int NumberParityBits,
int max_iter );
void MinSum( int BitErrors[],
int DecodedBits[],
struct c_node c_nodes[],
struct v_node v_nodes[],
int CodeLength,
int NumberParityBits,
int max_iter,
float r_scale_factor,
float q_scale_factor,
int data[] );
void SumProduct( int BitErrors[],
int DecodedBits[],
struct c_node c_nodes[],
struct v_node v_nodes[],
int CodeLength,
int NumberParityBits,
int max_iter,
float r_scale_factor,
float q_scale_factor,
int data[]);
#endif