int t_butlp(sp_test *tst, sp_data *sp, const char *hash)
{
uint32_t n;
int fail = 0;
SPFLOAT in = 0;
SPFLOAT out = 0;
udata ud;
ud.counter = 0;
sp_noise_create(&ud.ns);
sp_butlp_create(&ud.butlp);
sp_noise_init(sp, ud.ns);
sp_butlp_init(sp, ud.butlp);
for(n = 0; n < tst->size; n++) {
in = 0;
out = 0;
if(ud.counter == 0) {
ud.butlp->freq= 500 + sp_rand(sp) % 4000;
}
sp_noise_compute(sp, ud.ns, NULL, &in);
sp_butlp_compute(sp, ud.butlp, &in, &out);
ud.counter = (ud.counter + 1) % 5000;
sp_test_add_sample(tst, out);
}
if(sp_test_compare(tst, hash) == SP_NOT_OK) {
printf("Generated hash %s does not match reference hash %s\n",
tst->md5string, hash);
fail = 1;
}
sp_noise_destroy(&ud.ns);
sp_butlp_destroy(&ud.butlp);
if(fail) return SP_NOT_OK;
else return SP_OK;
}
void process(AUAudioFrameCount frameCount, AUAudioFrameCount bufferOffset) override {
// For each sample.
for (int frameIndex = 0; frameIndex < frameCount; ++frameIndex) {
double cutoffFrequency = double(cutoffFrequencyRamper.getStep());
int frameOffset = int(frameIndex + bufferOffset);
butlp->freq = (float)cutoffFrequency;
if (!started) {
outBufferListPtr->mBuffers[0] = inBufferListPtr->mBuffers[0];
outBufferListPtr->mBuffers[1] = inBufferListPtr->mBuffers[1];
return;
}
for (int channel = 0; channel < channels; ++channel) {
float *in = (float *)inBufferListPtr->mBuffers[channel].mData + frameOffset;
float *out = (float *)outBufferListPtr->mBuffers[channel].mData + frameOffset;
sp_butlp_compute(sp, butlp, in, out);
}
}
}
