static void
BandSplitter_setFrequencies(BandSplitter *self)
{
int i;
MYFLT frac = 1. / self->bands;
for (i=0; i<self->bands; i++) {
self->band_freqs[i] = MYPOW(MYPOW(self->max_freq/self->min_freq, frac), i) * self->min_freq;
}
}
static void
LFO_generates_aa(LFO *self) {
MYFLT val, inc, freq, sharp, pointer, numh;
MYFLT v1, v2, inc2, fade;
MYFLT sharp2 = 0.0;
int i, maxHarms;
MYFLT *fr = Stream_getData((Stream *)self->freq_stream);
MYFLT *sh = Stream_getData((Stream *)self->sharp_stream);
switch (self->wavetype) {
case 0: /* Saw up */
for (i=0; i<self->bufsize; i++) {
sharp = sh[i];
if (sharp < 0.0)
sharp = 0.0;
else if (sharp > 1.0)
sharp = 1.0;
freq = fr[i];
if (freq < 0.00001)
freq = 0.00001;
else if (freq > self->srOverFour)
freq = self->srOverFour;
inc = freq * self->oneOverSr;
maxHarms = (int)(self->srOverFour/freq);
numh = sharp * 46.0 + 4.0;
if (numh > maxHarms)
numh = maxHarms;
pointer = self->pointerPos * 2.0 - 1.0;
val = pointer - MYTANH(numh * pointer) / MYTANH(numh);
self->data[i] = val;
self->pointerPos += inc;
if (self->pointerPos < 0)
self->pointerPos += 1.0;
else if (self->pointerPos >= 1)
self->pointerPos -= 1.0;
}
break;
case 1: /* Saw down */
for (i=0; i<self->bufsize; i++) {
sharp = sh[i];
if (sharp < 0.0)
sharp = 0.0;
else if (sharp > 1.0)
sharp = 1.0;
freq = fr[i];
if (freq < 0.00001)
freq = 0.00001;
else if (freq > self->srOverFour)
freq = self->srOverFour;
inc = freq * self->oneOverSr;
maxHarms = (int)(self->srOverFour/freq);
numh = sharp * 46.0 + 4.0;
if (numh > maxHarms)
numh = maxHarms;
pointer = self->pointerPos * 2.0 - 1.0;
val = -(pointer - MYTANH(numh * pointer) / MYTANH(numh));
self->data[i] = val;
self->pointerPos += inc;
if (self->pointerPos < 0)
self->pointerPos += 1.0;
else if (self->pointerPos >= 1)
self->pointerPos -= 1.0;
}
break;
case 2: /* Square */
for (i=0; i<self->bufsize; i++) {
sharp = sh[i];
if (sharp < 0.0)
sharp = 0.0;
else if (sharp > 1.0)
sharp = 1.0;
freq = fr[i];
if (freq < 0.00001)
freq = 0.00001;
else if (freq > self->srOverFour)
freq = self->srOverFour;
inc = freq * self->oneOverSr;
maxHarms = (int)(self->srOverEight/freq);
numh = sharp * 46.0 + 4.0;
if (numh > maxHarms)
numh = maxHarms;
val = MYATAN(numh * MYSIN(TWOPI*self->pointerPos));
self->data[i] = val * self->oneOverPiOverTwo;
self->pointerPos += inc;
if (self->pointerPos < 0)
self->pointerPos += 1.0;
else if (self->pointerPos >= 1)
self->pointerPos -= 1.0;
}
break;
case 3: /* Triangle */
for (i=0; i<self->bufsize; i++) {
sharp = sh[i];
if (sharp < 0.0)
sharp = 0.0;
else if (sharp > 1.0)
sharp = 1.0;
freq = fr[i];
if (freq < 0.00001)
freq = 0.00001;
else if (freq > self->srOverFour)
freq = self->srOverFour;
inc = freq * self->oneOverSr;
maxHarms = (int)(self->srOverFour/freq);
if ((sharp * 36.0) > maxHarms)
numh = (MYFLT)(maxHarms / 36.0);
else
numh = sharp;
v1 = MYTAN(MYSIN(TWOPI*self->pointerPos)) * self->oneOverPiOverTwo;
pointer = self->pointerPos + 0.25;
if (pointer > 1.0)
pointer -= 1.0;
v2 = 4.0 * (0.5 - MYFABS(pointer - 0.5)) - 1.0;
val = v1 * (1 - numh) + v2 * numh;
self->data[i] = val;
self->pointerPos += inc;
if (self->pointerPos < 0)
self->pointerPos += 1.0;
else if (self->pointerPos >= 1)
self->pointerPos -= 1.0;
}
break;
case 4: /* Pulse */
for (i=0; i<self->bufsize; i++) {
sharp = sh[i];
if (sharp < 0.0)
sharp = 0.0;
else if (sharp > 1.0)
sharp = 1.0;
freq = fr[i];
if (freq < 0.00001)
freq = 0.00001;
else if (freq > self->srOverFour)
freq = self->srOverFour;
inc = freq * self->oneOverSr;
maxHarms = (int)(self->srOverEight/freq);
numh = MYFLOOR(sharp * 46.0 + 4.0);
if (numh > maxHarms)
numh = maxHarms;
if (MYFMOD(numh, 2.0) == 0.0)
numh += 1.0;
val = MYTAN(MYPOW(MYFABS(MYSIN(TWOPI*self->pointerPos)), numh));
self->data[i] = val * self->oneOverPiOverTwo;
self->pointerPos += inc;
if (self->pointerPos < 0)
self->pointerPos += 1.0;
else if (self->pointerPos >= 1)
self->pointerPos -= 1.0;
}
break;
case 5: /* Bi-Pulse */
for (i=0; i<self->bufsize; i++) {
sharp = sh[i];
if (sharp < 0.0)
sharp = 0.0;
else if (sharp > 1.0)
sharp = 1.0;
freq = fr[i];
if (freq < 0.00001)
freq = 0.00001;
else if (freq > self->srOverFour)
freq = self->srOverFour;
inc = freq * self->oneOverSr;
maxHarms = (int)(self->srOverEight/freq);
numh = MYFLOOR(sharp * 46.0 + 4.0);
if (numh > maxHarms)
numh = maxHarms;
if (MYFMOD(numh, 2.0) == 0.0)
numh += 1.0;
val = MYTAN(MYPOW(MYSIN(TWOPI*self->pointerPos), numh));
self->data[i] = val * self->oneOverPiOverTwo;
self->pointerPos += inc;
if (self->pointerPos < 0)
self->pointerPos += 1.0;
else if (self->pointerPos >= 1)
self->pointerPos -= 1.0;
}
break;
case 6: /* SAH */
for (i=0; i<self->bufsize; i++) {
sharp = sh[i];
if (sharp < 0.0)
sharp = 0.0;
else if (sharp > 1.0)
sharp = 1.0;
numh = 1.0 - sharp;
freq = fr[i];
if (freq < 0.00001)
freq = 0.00001;
else if (freq > self->srOverFour)
freq = self->srOverFour;
inc = freq * self->oneOverSr;
inc2 = 1.0 / (int)(1.0 / inc * numh);
self->pointerPos += inc;
if (self->pointerPos < 0)
self->pointerPos += 1.0;
else if (self->pointerPos >= 1) {
self->pointerPos -= 1.0;
self->sahPointerPos = 0.0;
self->sahLastValue = self->sahCurrentValue;
self->sahCurrentValue = RANDOM_UNIFORM * 2.0 - 1.0;
}
if (self->sahPointerPos < 1.0) {
fade = 0.5 * MYSIN(PI * (self->sahPointerPos+0.5)) + 0.5;
val = self->sahCurrentValue * (1.0 - fade) + self->sahLastValue * fade;
self->sahPointerPos += inc2;
}
else {
val = self->sahCurrentValue;
}
self->data[i] = val;
}
break;
case 7: /* Sine-mod */
for (i=0; i<self->bufsize; i++) {
sharp = sh[i];
if (sharp < 0.0)
sharp = 0.0;
else if (sharp > 1.0)
sharp = 1.0;
freq = fr[i];
if (freq < 0.00001)
freq = 0.00001;
else if (freq > self->srOverFour)
freq = self->srOverFour;
inc = freq * self->oneOverSr;
inc2 = inc * sharp * 0.99;
sharp2 = sharp * 0.5;
self->modPointerPos += inc2;
if (self->modPointerPos < 0)
self->modPointerPos += 1.0;
else if (self->modPointerPos >= 1)
self->modPointerPos -= 1.0;
val = ((sharp2 * MYCOS(TWOPI*self->modPointerPos) + sharp2) + (1.0 - sharp)) * MYSIN(TWOPI*self->pointerPos);
self->data[i] = val;
self->pointerPos += inc;
if (self->pointerPos < 0)
self->pointerPos += 1.0;
else if (self->pointerPos >= 1)
self->pointerPos -= 1.0;
}
break;
default:
break;
}
}
static void
Harmonizer_transform_ii(Harmonizer *self) {
MYFLT val, amp, inc, ratio, rate, del, xind, pos, envpos, fpart;
int i, ipart;
MYFLT *in = Stream_getData((Stream *)self->input_stream);
MYFLT trans = PyFloat_AS_DOUBLE(self->transpo);
MYFLT feed = PyFloat_AS_DOUBLE(self->feedback);
ratio = MYPOW(2.0, trans/12.0);
rate = (ratio-1.0) / self->winsize;
inc = -rate / self->sr;
for (i=0; i<self->bufsize; i++) {
/* first overlap */
pos = self->pointerPos;
envpos = pos * 8192.0;
ipart = (int)envpos;
fpart = envpos - ipart;
amp = self->envelope[ipart] + (self->envelope[ipart+1] - self->envelope[ipart]) * fpart;
del = pos * self->winsize;
xind = self->in_count - (del * self->sr);
if (xind < 0)
xind += self->sr;
ipart = (int)xind;
fpart = xind - ipart;
val = self->buffer[ipart] + (self->buffer[ipart+1] - self->buffer[ipart]) * fpart;
self->data[i] = val * amp;
/* second overlap */
pos = self->pointerPos + 0.5;
if (pos >= 1)
pos -= 1.0;
envpos = pos * 8192.0;
ipart = (int)envpos;
fpart = envpos - ipart;
amp = self->envelope[ipart] + (self->envelope[ipart+1] - self->envelope[ipart]) * fpart;
del = pos * self->winsize;
xind = self->in_count - (del * self->sr);
if (xind < 0)
xind += self->sr;
ipart = (int)xind;
fpart = xind - ipart;
val = self->buffer[ipart] + (self->buffer[ipart+1] - self->buffer[ipart]) * fpart;
self->data[i] += (val * amp);
self->pointerPos += inc;
if (self->pointerPos < 0.0)
self->pointerPos += 1.0;
else if (self->pointerPos >= 1.0)
self->pointerPos -= 1.0;
self->buffer[self->in_count] = in[i] + (self->data[i] * feed);
if (self->in_count == 0)
self->buffer[(int)self->sr] = self->buffer[0];
self->in_count++;
if (self->in_count >= self->sr)
self->in_count = 0;
}
}
static void
LFO_generates_ii(LFO *self) {
MYFLT val, inc, freq, sharp, pointer, numh;
MYFLT v1, v2, inc2, fade;
int i, maxHarms;
freq = PyFloat_AS_DOUBLE(self->freq);
if (freq <= 0) {
return;
}
sharp = PyFloat_AS_DOUBLE(self->sharp);
if (sharp < 0.0)
sharp = 0.0;
else if (sharp > 1.0)
sharp = 1.0;
inc = freq / self->sr;
switch (self->wavetype) {
case 0: /* Saw up */
maxHarms = (int)(self->srOverFour/freq);
numh = sharp * 46.0 + 4.0;
if (numh > maxHarms)
numh = maxHarms;
for (i=0; i<self->bufsize; i++) {
pointer = self->pointerPos * 2.0 - 1.0;
val = pointer - MYTANH(numh * pointer) / MYTANH(numh);
self->data[i] = val;
self->pointerPos += inc;
if (self->pointerPos < 0)
self->pointerPos += 1.0;
else if (self->pointerPos >= 1)
self->pointerPos -= 1.0;
}
break;
case 1: /* Saw down */
maxHarms = (int)(self->srOverFour/freq);
numh = sharp * 46.0 + 4.0;
if (numh > maxHarms)
numh = maxHarms;
for (i=0; i<self->bufsize; i++) {
pointer = self->pointerPos * 2.0 - 1.0;
val = -(pointer - MYTANH(numh * pointer) / MYTANH(numh));
self->data[i] = val;
self->pointerPos += inc;
if (self->pointerPos < 0)
self->pointerPos += 1.0;
else if (self->pointerPos >= 1)
self->pointerPos -= 1.0;
}
break;
case 2: /* Square */
maxHarms = (int)(self->srOverEight/freq);
numh = sharp * 46.0 + 4.0;
if (numh > maxHarms)
numh = maxHarms;
for (i=0; i<self->bufsize; i++) {
val = MYATAN(numh * MYSIN(TWOPI*self->pointerPos));
self->data[i] = val * self->oneOverPiOverTwo;
self->pointerPos += inc;
if (self->pointerPos < 0)
self->pointerPos += 1.0;
else if (self->pointerPos >= 1)
self->pointerPos -= 1.0;
}
break;
case 3: /* Triangle */
maxHarms = (int)(self->srOverFour/freq);
if ((sharp * 36.0) > maxHarms)
numh = (MYFLT)(maxHarms / 36.0);
else
numh = sharp;
for (i=0; i<self->bufsize; i++) {
v1 = MYTAN(MYSIN(TWOPI*self->pointerPos)) * self->oneOverPiOverTwo;
pointer = self->pointerPos + 0.25;
if (pointer > 1.0)
pointer -= 1.0;
v2 = 4.0 * (0.5 - MYFABS(pointer - 0.5)) - 1.0;
val = v1 * (1 - numh) + v2 * numh;
self->data[i] = val;
self->pointerPos += inc;
if (self->pointerPos < 0)
self->pointerPos += 1.0;
else if (self->pointerPos >= 1)
self->pointerPos -= 1.0;
}
break;
case 4: /* Pulse */
maxHarms = (int)(self->srOverEight/freq);
numh = MYFLOOR(sharp * 46.0 + 4.0);
if (numh > maxHarms)
numh = maxHarms;
if (MYFMOD(numh, 2.0) == 0.0)
numh += 1.0;
for (i=0; i<self->bufsize; i++) {
val = MYTAN(MYPOW(MYFABS(MYSIN(TWOPI*self->pointerPos)), numh));
self->data[i] = val * self->oneOverPiOverTwo;
self->pointerPos += inc;
if (self->pointerPos < 0)
self->pointerPos += 1.0;
else if (self->pointerPos >= 1)
self->pointerPos -= 1.0;
}
break;
case 5: /* Bi-Pulse */
maxHarms = (int)(self->srOverEight/freq);
numh = MYFLOOR(sharp * 46.0 + 4.0);
if (numh > maxHarms)
numh = maxHarms;
if (MYFMOD(numh, 2.0) == 0.0)
numh += 1.0;
for (i=0; i<self->bufsize; i++) {
val = MYTAN(MYPOW(MYSIN(TWOPI*self->pointerPos), numh));
self->data[i] = val * self->oneOverPiOverTwo;
self->pointerPos += inc;
if (self->pointerPos < 0)
self->pointerPos += 1.0;
else if (self->pointerPos >= 1)
self->pointerPos -= 1.0;
}
break;
case 6: /* SAH */
numh = 1.0 - sharp;
inc2 = 1.0 / (int)(1.0 / inc * numh);
for (i=0; i<self->bufsize; i++) {
self->pointerPos += inc;
if (self->pointerPos < 0)
self->pointerPos += 1.0;
else if (self->pointerPos >= 1) {
self->pointerPos -= 1.0;
self->sahPointerPos = 0.0;
self->sahLastValue = self->sahCurrentValue;
self->sahCurrentValue = rand()/((MYFLT)(RAND_MAX)*0.5) - 1.0;
}
if (self->sahPointerPos < 1.0) {
fade = 0.5 * MYSIN(PI * (self->sahPointerPos+0.5)) + 0.5;
val = self->sahCurrentValue * (1.0 - fade) + self->sahLastValue * fade;
self->sahPointerPos += inc2;
}
else {
val = self->sahCurrentValue;
}
self->data[i] = val;
}
break;
case 7: /* Sine-mod */
inc2 = inc * sharp;
for (i=0; i<self->bufsize; i++) {
self->modPointerPos += inc2;
if (self->modPointerPos < 0)
self->modPointerPos += 1.0;
else if (self->modPointerPos >= 1)
self->modPointerPos -= 1.0;
val = (0.5 * MYCOS(TWOPI*self->modPointerPos) + 0.5) * MYSIN(TWOPI*self->pointerPos);
self->data[i] = val;
self->pointerPos += inc;
if (self->pointerPos < 0)
self->pointerPos += 1.0;
else if (self->pointerPos >= 1)
self->pointerPos -= 1.0;
}
break;
default:
break;
}
}
