diff options
Diffstat (limited to 'src/cnetz/dsp.c')
| -rw-r--r-- | src/cnetz/dsp.c | 31 |
1 files changed, 9 insertions, 22 deletions
diff --git a/src/cnetz/dsp.c b/src/cnetz/dsp.c index 1fc404a..b5f9d53 100644 --- a/src/cnetz/dsp.c +++ b/src/cnetz/dsp.c @@ -85,7 +85,7 @@ static void dsp_init_ramp(cnetz_t *cnetz) } /* Init transceiver instance. */ -int dsp_init_sender(cnetz_t *cnetz, int measure_speed, double clock_speed[2], double noise) +int dsp_init_sender(cnetz_t *cnetz, int measure_speed, double clock_speed[2]) { int rc = 0; double size; @@ -123,7 +123,6 @@ int dsp_init_sender(cnetz_t *cnetz, int measure_speed, double clock_speed[2], do /* create devation and ramp */ cnetz->fsk_deviation = FSK_DEVIATION; dsp_init_ramp(cnetz); - cnetz->fsk_noise = noise; /* create speech buffer */ cnetz->dsp_speech_buffer = calloc(sizeof(sample_t), cnetz->sender.samplerate); /* buffer is greater than sr/1.1, just to be secure */ @@ -279,32 +278,20 @@ static int fsk_testtone_encode(cnetz_t *cnetz) static int fsk_nothing_encode(cnetz_t *cnetz) { sample_t *spl; - double phase, bitstep, r; + double phase, bitstep; int i, count; spl = cnetz->fsk_tx_buffer; phase = cnetz->fsk_tx_phase; bitstep = cnetz->fsk_tx_bitstep * 256.0; - if (cnetz->fsk_noise) { - r = cnetz->fsk_noise; - /* add 198 bits of noise */ - for (i = 0; i < 198; i++) { - do { - *spl++ = (double)((int16_t)random()) * r / 32768.0; - phase += bitstep; - } while (phase < 256.0); - phase -= 256.0; - } - } else { - /* add 198 bits of silence */ - for (i = 0; i < 198; i++) { - do { - *spl++ = 0; - phase += bitstep; - } while (phase < 256.0); - phase -= 256.0; - } + /* add 198 bits of silence */ + for (i = 0; i < 198; i++) { + do { + *spl++ = 0; + phase += bitstep; + } while (phase < 256.0); + phase -= 256.0; } /* depending on the number of samples, return the number */ |