int sporth_pinknoise(sporth_stack *stack, void *ud)
{
plumber_data *pd = ud;
SPFLOAT out;
SPFLOAT amp;
sp_pinknoise *pinknoise;
switch(pd->mode) {
case PLUMBER_CREATE:
#ifdef DEBUG_MODE
fprintf(stderr, "pinknoise: Creating\n");
#endif
sp_pinknoise_create(&pinknoise);
plumber_add_ugen(pd, SPORTH_PINKNOISE, pinknoise);
if(sporth_check_args(stack, "f") != SPORTH_OK) {
fprintf(stderr,"Not enough arguments for pinknoise\n");
stack->error++;
return PLUMBER_NOTOK;
}
amp = sporth_stack_pop_float(stack);
sporth_stack_push_float(stack, 0);
break;
case PLUMBER_INIT:
#ifdef DEBUG_MODE
fprintf(stderr, "pinknoise: Initialising\n");
#endif
amp = sporth_stack_pop_float(stack);
pinknoise = pd->last->ud;
sp_pinknoise_init(pd->sp, pinknoise);
sporth_stack_push_float(stack, 0);
break;
case PLUMBER_COMPUTE:
amp = sporth_stack_pop_float(stack);
pinknoise = pd->last->ud;
pinknoise->amp = amp;
sp_pinknoise_compute(pd->sp, pinknoise, NULL, &out);
sporth_stack_push_float(stack, out);
break;
case PLUMBER_DESTROY:
pinknoise = pd->last->ud;
sp_pinknoise_destroy(&pinknoise);
break;
default:
fprintf(stderr, "pinknoise: Unknown mode!\n");
break;
}
return PLUMBER_OK;
}
void process(AUAudioFrameCount frameCount, AUAudioFrameCount bufferOffset) override {
// For each sample.
for (int frameIndex = 0; frameIndex < frameCount; ++frameIndex) {
double amplitude = double(amplitudeRamper.getStep());
int frameOffset = int(frameIndex + bufferOffset);
*pinknoise->amp = (float)amplitude;
float temp = 0;
for (int channel = 0; channel < channels; ++channel) {
float *out = (float *)outBufferListPtr->mBuffers[channel].mData + frameOffset;
if (started) {
if (channel == 0) {
sp_pinknoise_compute(sp, pinknoise, nil, &temp);
}
*out = temp;
} else {
*out = 0.0;
}
}
}
}
