radio95/fm95
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Code Issues Activity

also delay pilot

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This commit is contained in:
KubaPro010
2026-02-15 13:29:09 +01:00
parent 36b861b7e5
commit c1c97e4883
4 changed files with 11 additions and 2 deletions
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2
dsp/delay.h
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@@ -1,4 +1,6 @@
#include <string.h>
#include <stdlib.h>
#include <stdint.h>
typedef struct delay_line_t {
float *buffer;

6
modulation/stereo_encoder.c
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@@ -7,7 +7,9 @@ void init_stereo_encoder(StereoEncoder* st, uint8_t multiplier, Oscillator* osc,
st->pilot_volume = pilot_volume;
st->audio_volume = audio_volume;
#ifdef STEREO_SSB
init_delay_line(&st->delay_pilot, osc->sample_rate);
init_delay_line(&st->delay, osc->sample_rate);
set_delay_line(&st->delay_pilot, STEREO_SSB*2+1);
set_delay_line(&st->delay, STEREO_SSB*2+1);
#endif
}
@@ -30,6 +32,9 @@ float stereo_encode(StereoEncoder* st, uint8_t enabled, float left, float right,
#endif
float signalx1 = get_oscillator_sin_multiplier_ni(st->osc, st->multiplier);
#ifdef STEREO_SSB
signalx1 = delay_line(&st->delay_pilot, signalx1);
#endif
float signalx2 = get_oscillator_sin_multiplier_ni(st->osc, st->multiplier * 2.0f);
#ifdef STEREO_SSB
@@ -42,4 +47,5 @@ float stereo_encode(StereoEncoder* st, uint8_t enabled, float left, float right,
void exit_stereo_encoder(StereoEncoder* st) {
exit_delay_line(&st->delay);
exit_delay_line(&st->delay_pilot);
}

3
modulation/stereo_encoder.h
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@@ -14,7 +14,8 @@ typedef struct
Oscillator* osc;
float audio_volume;
float pilot_volume;
struct delay_line_t delay;
delay_line_t delay;
delay_line_t delay_pilot;
} StereoEncoder;
void init_stereo_encoder(StereoEncoder *st, uint8_t multiplier, Oscillator *osc, float audio_volume, float pilot_volume);

2
src/fm95.c
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@@ -145,7 +145,7 @@ void cleanup_runtime(FM95_Runtime* runtime, const FM95_Config config) {
}
#ifdef STEREO_SSB
firhilbf_destroy(runtime->stereo_hilbert);
exit_stereo_encoder(runtime->stencode);
exit_stereo_encoder(&runtime->stencode);
#endif
}