10 May
2007
10 May
'07
11:37 p.m.
On Thu, May 10, 2007 at 11:44:54PM +0200, Fons Adriaensen wrote:
On Thu, May 10, 2007 at 03:58:25PM +0100, Steve Harris
wrote:
Anyone who refuses to write LV2 extensions has a bad taste.
this is about aesthetics.
we all love the sound, but look:
void Ladspa_Moogvcf2::runproc (unsigned long len, bool add)
{
int k;
float *p0, *p1, *p2, *p3, *p4;
float c1, c2, c3, c4, c5;
float g0, g1, r, dr, w, dw, x, t;
p0 = _port [0];
p1 = _port [1];
p2 = _port [2] - 1;
p3 = _port [3] - 1;
p4 = _port [4] - 1;
g0 = exp2ap (0.1661 * _port [5][0]) / 2;
g1 = exp2ap (0.1661 * _port [10][0]) * 2;
if (add) g1 *= _gain;
c1 = _c1 + 1e-6;
c2 = _c2;
c3 = _c3;
c4 = _c4;
c5 = _c5;
w = _w;
r = _r;
do
{
k = (len > 24) ? 16 : len;
p2 += k;
p3 += k;
p4 += k;
len -= k;
t = exp2ap (_port [7][0] * *p3 + _port [6][0] + *p2 + 10.71) / _fsam;
if (t < 0.8) t *= 1 - 0.4 * t - 0.125 * t * t;
else
{
t *= 0.6;
if (t > 0.92) t = 0.92;
}
dw = (t - w) / k;
t = _port [9][0] * *p4 + _port [8][0];
if (t > 1) t = 1;
if (t < 0) t = 0;
dr = (t - r) / k;
while (k--)
{
w += dw;
r += dr;
x = -4.5 * r * c5 + *p0++ * g0 + 1e-10;
// x = tanh (x);
x /= sqrt (1 + x * x);
c1 += w * (x - c1) / (1 + c1 * c1);
c2 += w * (c1 - c2) / (1 + c2 * c2);
c3 += w * (c2 - c3) / (1 + c3 * c3);
c4 += w * (c3 - c4) / (1 + c4 * c4);
if (add) *p1++ += g1 * (c4);
else *p1++ = g1 * (c4);
c5 += 0.5 * (c4 - c5);
}
}
while (len);
_c1 = c1;
_c2 = c2;
_c3 = c3;
_c4 = c4;
_c5 = c5;
_w = w;
_r = r;
}
you are IMO disqualified from aestetics discussions :)
--
torben Hohn
http://galan.sourceforge.net -- The graphical Audio language
I don't support it unless someone has a
representation issue. You're
not like to see if (fs == 44100) anyway, and if you did you'd want to
hedge a bit: if (fs > 44090 && fs < 44110). If you have to write if
(fs_num / fs_denom == 44100) then things are bit dodgy anyway.
Let me state once and for all, even it will not gain me any popularity:
Anyone who thinks that writing a range check on a fraction A/B is too
difficult is very probably completely incompetent and should not waste
his/her time trying to write audio DSP code for a plugin.