kopia lustrzana https://github.com/rs1729/RS
116 wiersze
2.1 KiB
C
116 wiersze
2.1 KiB
C
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#include <math.h>
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#include <complex.h>
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typedef unsigned char ui8_t;
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typedef unsigned short ui16_t;
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typedef unsigned int ui32_t;
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typedef char i8_t;
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typedef short i16_t;
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typedef int i32_t;
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typedef struct {
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int sr; // sample_rate
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int LOG2N;
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int N;
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int N2;
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float *xn;
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float complex *ew;
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float complex *Fm;
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float complex *X;
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float complex *Z;
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float complex *cx;
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float complex *win; // float real
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} dft_t;
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typedef struct {
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FILE *fp;
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//
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int sr; // sample_rate
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int bps; // bits/sample
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int nch; // channels
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int ch; // select channel
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//
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int symlen;
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float sps; // samples per symbol
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float _spb; // samples per bit
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float br; // baud rate
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//
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ui32_t sample_in;
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ui32_t sample_out;
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ui32_t delay;
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int buffered;
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int L;
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int M;
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int K;
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float *match;
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float *bufs;
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float dc_ofs;
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float dc;
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//
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int N_norm;
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int Nvar;
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float xsum;
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float qsum;
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float *xs;
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float *qs;
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// IQ-data
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int opt_iq;
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int N_IQBUF;
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float complex *raw_iqbuf;
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float complex *rot_iqbuf;
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//
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char *rawbits;
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char *hdr;
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int hdrlen;
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//
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float BT; // bw/time (ISI)
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float h; // modulation index
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// DFT
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dft_t DFT;
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double df;
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int len_sq;
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ui32_t sample_posframe;
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ui32_t sample_posnoise;
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double V_noise;
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double V_signal;
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double SNRdB;
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} dsp_t;
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typedef struct {
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int sr; // sample_rate
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int bps; // bits_sample bits/sample
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int nch; // channels
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int sel_ch; // select wav channel
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} pcm_t;
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float read_wav_header(pcm_t *, FILE *);
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int f32buf_sample(dsp_t *, int);
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int read_slbit(dsp_t *, int, int*, int, int, int, float, int);
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int getCorrDFT(dsp_t *, ui32_t, float *, ui32_t *);
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int headcmp(dsp_t *, int, ui32_t, int, int);
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int get_fqofs_rs41(dsp_t *, ui32_t, float *, float *);
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float get_bufvar(dsp_t *, int);
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float get_bufmu(dsp_t *, int);
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int init_buffers(dsp_t *);
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int free_buffers(dsp_t *);
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ui32_t get_sample(dsp_t *);
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