rs41iq: local bch_ecc.h in preparation

demod/demod_iq.h

@@ -1,19 +1,115 @@
 
-float read_wav_header(FILE*, float, int);
-int f32buf_sample(FILE*, int, int);
-int read_sbit(FILE*, int, int*, int, int, int, int);
-int read_IDsbit(FILE*, int, int*, int, int, int, int);
-int read_softbit(FILE *fp, int symlen, int *bit, float *sb, float level, int inv, int ofs, int reset, int cm);
-float header_level(char hdr[], int hLen, unsigned int pos, int inv);
 
-int getCorrDFT(int, int, unsigned int, float *, unsigned int *);
-int headcmp(int, char*, int, unsigned int, int, int);
-int get_fqofs(int, unsigned int, float *, float *);
-float get_bufvar(int);
-float get_bufmu(int);
+#include <math.h>
+#include <complex.h>
 
-int init_buffers(char*, int, float, int);
-int free_buffers(void);
+typedef unsigned char  ui8_t;
+typedef unsigned short ui16_t;
+typedef unsigned int   ui32_t;
+typedef char  i8_t;
+typedef short i16_t;
+typedef int   i32_t;
 
-unsigned int get_sample(void);
+
+typedef struct {
+    int sr;       // sample_rate
+    int LOG2N;
+    int N;
+    int N2;
+    float *xn;
+    float complex  *ew;
+    float complex  *Fm;
+    float complex  *X;
+    float complex  *Z;
+    float complex  *cx;
+    float complex  *win; // float real
+} dft_t;
+
+
+typedef struct {
+    FILE *fp;
+    //
+    int sr;       // sample_rate
+    int bps;      // bits/sample
+    int nch;      // channels
+    int ch;       // select channel
+    //
+    int symlen;
+    float sps;    // samples per symbol
+    float _spb;   // samples per bit
+    float br;     // baud rate
+    //
+    ui32_t sample_in;
+    ui32_t sample_out;
+    ui32_t delay;
+    int buffered;
+    int N;
+    int M;
+    int K;
+    float *match;
+    float *bufs;
+    float dc_ofs;
+    float dc;
+    //
+    int N_norm;
+    int Nvar;
+    float xsum;
+    float qsum;
+    float *xs;
+    float *qs;
+
+    // IQ-data
+    int opt_iq;
+    int N_IQBUF;
+    float complex *raw_iqbuf;
+    float complex *rot_iqbuf;
+
+    //
+    char *rawbits;
+    char *hdr;
+    int hdrlen;
+
+    //
+    float BT; // bw/time (ISI)
+    float h;  // modulation index
+
+    // DFT
+    dft_t DFT;
+
+    double df;
+    int len_sq;
+
+    ui32_t sample_posframe;
+    ui32_t sample_posnoise;
+
+    double V_noise;
+    double V_signal;
+    double SNRdB;
+
+} dsp_t;
+
+
+typedef struct {
+    int sr;       // sample_rate
+    int bps;      // bits_sample  bits/sample
+    int nch;      // channels
+    int sel_ch;   // select wav channel
+} pcm_t;
+
+
+
+float read_wav_header(pcm_t *, FILE *);
+int f32buf_sample(dsp_t *, int);
+int read_slbit(dsp_t *, int, int*, int, int, int, float);
+
+int getCorrDFT(dsp_t *, int, ui32_t, float *, ui32_t *);
+int headcmp(dsp_t *, int, ui32_t, int, int);
+int get_fqofs_rs41(dsp_t *, ui32_t, float *, float *);
+float get_bufvar(dsp_t *, int);
+float get_bufmu(dsp_t *, int);
+
+int init_buffers(dsp_t *);
+int free_buffers(dsp_t *);
+
+ui32_t get_sample(dsp_t *);