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freq ests, snr, Fs

master
David 2020-07-28 06:23:22 +09:30
parent 200073294f
commit 29c0bcf4bb
1 changed files with 29 additions and 9 deletions
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38
src/rtl_fsk.c
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@ -159,25 +159,45 @@ static void rtlsdr_callback(unsigned char *buf, uint32_t len, void *ctx)
if (udp_debug) { if (udp_debug) {
sample_counter += fsk_nin(fsk); sample_counter += fsk_nin(fsk);
if (sample_counter > samp_rate) { if (sample_counter > samp_rate) {
char buf[BUF_SZ];
char buf1[BUF_SZ];
size_t Ndft;
/* one second has passed, lets send some debug information */ /* one second has passed, lets send some debug information */
char buf[BUF_SZ];
char buf1[BUF_SZ];
size_t Ndft;
float *f_est;
int m;
sample_counter -= samp_rate; sample_counter -= samp_rate;
buf[0]=0; buf[0]=0;
/* Print a sample of the FFT from the freq estimator */ /* Current magnitude spectrum Sf[] from freq estimator */
snprintf(buf1, BUF_SZ, "{"); strncat(buf, buf1, BUF_SZ); snprintf(buf1, BUF_SZ, "{"); strncat(buf, buf1, BUF_SZ);
snprintf(buf1, BUF_SZ, "\"Sf\":["); strncat(buf, buf1, BUF_SZ); snprintf(buf1, BUF_SZ, "\"Sf\":["); strncat(buf, buf1, BUF_SZ);
Ndft = fsk->Ndft; Ndft = fsk->Ndft;
for(i=0; i<Ndft; i++) { for(i=0; i<Ndft; i++) {
snprintf(buf1, BUF_SZ, "%f ",(fsk->Sf)[i]); strncat(buf, buf1, BUF_SZ); snprintf(buf1, BUF_SZ, "%f",(fsk->Sf)[i]); strncat(buf, buf1, BUF_SZ);
if(i<Ndft-1) { snprintf(buf1, BUF_SZ, ","); strncat(buf, buf1, BUF_SZ); } if(i<Ndft-1) { snprintf(buf1, BUF_SZ, ", "); strncat(buf, buf1, BUF_SZ); }
} }
snprintf(buf1, BUF_SZ, "]"); strncat(buf, buf1, BUF_SZ); snprintf(buf1, BUF_SZ, "]"); strncat(buf, buf1, BUF_SZ);
/* TODO: tone freq ests, SNRest, maybe buffer sample clock offsets and send as an array */
/* FSK tone freq estimates */
if (fsk->freq_est_type)
f_est = fsk->f2_est;
else
f_est = fsk->f_est;
snprintf(buf1, BUF_SZ, ", \"f_est\":["); strncat(buf, buf1, BUF_SZ);
for(m=0; m<fsk->mode; m++) {
snprintf(buf1, BUF_SZ, "%f", f_est[m]); strncat(buf, buf1, BUF_SZ);
if (m < (fsk->mode-1)) { snprintf(buf1, BUF_SZ, ", "); strncat(buf, buf1, BUF_SZ); }
}
snprintf(buf1, BUF_SZ, "]"); strncat(buf, buf1, BUF_SZ);
snprintf(buf1, BUF_SZ, ", \"SNRest\":[%f], \"Fs\":[%d]",
fsk->SNRest, fsk->Fs); strncat(buf, buf1, BUF_SZ);
/* finish up JSON and send to GUI */
snprintf(buf1, BUF_SZ, "}\n"); strncat(buf, buf1, BUF_SZ); snprintf(buf1, BUF_SZ, "}\n"); strncat(buf, buf1, BUF_SZ);
udp_sendbuf(buf); udp_sendbuf(buf);
fprintf(stderr, "Tick\n"); fprintf(stderr, "Tick\n");