radio95/fm95
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maybe this is faster - one branch instead of 15

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This commit is contained in:
KubaPro010
2026-07-22 18:20:30 +02:00
parent fa6f69077b
commit 03cb1b271d
3 changed files with 27 additions and 39 deletions
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lib/stereo_encoder.c
+15 -18
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@@ -16,31 +16,28 @@ void init_stereo_encoder(StereoEncoder* st, uint8_t stereo_ssb, uint8_t multipli
float stereo_encode(StereoEncoder* st, uint8_t enabled, float left, float right, float *audio) {
float mid = (left+right) * 0.5f;
if(!enabled) {
*audio = mid * 2.0f * st->audio_volume;
*audio = mid * st->audio_volume * 2.0f;
return 0.0f;
}
if(st->stereo_hilbert) mid = delay_line(&st->delay, mid);
float side = (left-right) * 0.5f;
float complex stereo_hilbert = 0+0*I;
if(st->stereo_hilbert) firhilbf_r2c_execute(st->stereo_hilbert, side, &stereo_hilbert);
float signalx1 = get_oscillator_sin_multiplier_ni(st->osc, st->multiplier);
float signalx2cos = 0.0f;
if(st->stereo_hilbert) {
signalx1 = delay_line(&st->delay_pilot, signalx1);
signalx2cos = get_oscillator_cos_multiplier_ni(st->osc, st->multiplier * 2.0f);
}
float signalx2 = get_oscillator_sin_multiplier_ni(st->osc, st->multiplier * 2.0f);
*audio = mid * st->audio_volume;
if(st->stereo_hilbert) {
float stereo = (crealf(stereo_hilbert) * signalx2) - (cimagf(stereo_hilbert) * signalx2cos);
*audio += stereo * st->audio_volume;
} else *audio += (side*signalx2) * st->audio_volume;
float complex stereo_hilbert = 0+0*I;
float signalx2cos = get_oscillator_cos_multiplier_ni(st->osc, st->multiplier * 2.0f);
mid = delay_line(&st->delay, mid);
*audio = mid * st->audio_volume;
signalx1 = delay_line(&st->delay_pilot, signalx1);
firhilbf_r2c_execute(st->stereo_hilbert, side, &stereo_hilbert);
*audio += ((crealf(stereo_hilbert) * signalx2) - (cimagf(stereo_hilbert) * signalx2cos)) * st->audio_volume;
return signalx1 * st->pilot_volume;
}
*audio = mid * st->audio_volume + (side*signalx2) * st->audio_volume;
return signalx1 * st->pilot_volume;
}