void process(AUAudioFrameCount frameCount, AUAudioFrameCount bufferOffset) override {
for (int frameIndex = 0; frameIndex < frameCount; ++frameIndex) {
int frameOffset = int(frameIndex + bufferOffset);
distortion = distortionRamper.getAndStep();
lpf180->dist = (float)distortion;
lpf181->dist = (float)distortion;
cutoffFrequency = cutoffFrequencyRamper.getAndStep();
lpf180->cutoff = (float)cutoffFrequency;
lpf181->cutoff = (float)cutoffFrequency;
resonance = resonanceRamper.getAndStep();
lpf180->res = (float)resonance;
lpf181->res = (float)resonance;
for (int channel = 0; channel < channels; ++channel) {
float *in = (float *)inBufferListPtr->mBuffers[channel].mData + frameOffset;
float *out = (float *)outBufferListPtr->mBuffers[channel].mData + frameOffset;
if (started) {
if (channel == 0) {
sp_lpf18_compute(sp, lpf180, in, out);
} else {
sp_lpf18_compute(sp, lpf181, in, out);
}
} else {
*out = *in;
}
}
}
}
void write_osc(sp_data *sp, void *udata) {
UserData *ud = udata;
int i;
SPFLOAT out = 0, osc = 0, filt = 0, lfo = 0;
for(i = 0; i < 3; i++) {
sp_osc_compute(sp, ud->osc[i], NULL, &osc);
out += osc * 0.3;
}
sp_osc_compute(sp, ud->lfo, NULL, &lfo);
ud->lpf->cutoff = 100 + 3000 * (0.5 * (lfo + 1));
sp_lpf18_compute(sp, ud->lpf, &out, &filt);
sp->out[0] = filt;
}
