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/* sc4pd:
support functions
Copyright (c) 2004 Tim Blechmann.
This code is derived from:
SuperCollider real time audio synthesis system
Copyright (c) 2002 James McCartney. All rights reserved.
http://www.audiosynth.com
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
Based on:
PureData by Miller Puckette and others.
http://www.crca.ucsd.edu/~msp/software.html
FLEXT by Thomas Grill
http://www.parasitaere-kapazitaeten.net/ext
SuperCollider by James McCartney
http://www.audiosynth.com
Coded while listening to: Nmperign & Guenter Mueller: More Gloom, More Light
*/
#include "sc4pd.hpp"
#include <flsupport.h>
bool sc_add (flext::AtomList a)
{
for (int i = 0; i!=a.Count();++i)
{
if ( flext::IsSymbol(a[i]) )
{
const char * teststring;
teststring = flext::GetString(a[i]);
if((strcmp(teststring,"add"))==0)
return true;
}
}
return false;
}
float sc_getfloatarg (flext::AtomList a,int i)
{
if (a.Count() > 0 && a.Count() > i)
return flext::GetAFloat(a[i]);
else
return 0;
}
bool sc_ar(flext::AtomList a)
{
for (int i = 0; i!=a.Count();++i)
{
if ( flext::IsSymbol(a[i]) )
{
const char * teststring;
teststring = flext::GetString(a[i]);
if((strcmp(teststring,"ar"))==0)
return true;
}
}
return false;
}
bool sc_inv(flext::AtomList a)
{
for (int i = 0; i!=a.Count();++i)
{
if ( flext::IsSymbol(a[i]) )
{
const char * teststring;
teststring = flext::GetString(a[i]);
if((strcmp(teststring,"inv"))==0)
return true;
}
}
return false;
}
int32 timeseed()
{
static int32 count = 0;
double time = flext::GetOSTime();
double sec = trunc(time);
double usec = (time-sec)*1e6;
time_t tsec = sec;
useconds_t tusec =usec; /* not exacty the way, it's calculated
in SuperCollider, but it's only
the seed */
return (int32)tsec ^ (int32)tusec ^ count--;
}
/* from Convolution.cpp */
extern "C"
{
float *cosTable[32];
float *fftWindow[32];
}
float* create_cosTable(int log2n)
{
int size = 1 << log2n;
int size2 = size / 4 + 1;
float *win = (float*)malloc(size2 * sizeof(float));
double winc = twopi / size;
for (int i=0; i<size2; ++i) {
double w = i * winc;
win[i] = cos(w);
}
return win;
}
float* create_fftwindow(int log2n)
{
int size = 1 << log2n;
float *win = (float*)malloc(size * sizeof(float));
//double winc = twopi / size;
double winc = pi / size;
for (int i=0; i<size; ++i) {
double w = i * winc;
//win[i] = 0.5 - 0.5 * cos(w);
win[i] = sin(w);
}
return win;
}
void init_ffts()
{
#if __VEC__
for (int i=0; i<32; ++i) {
fftsetup[i] = 0;
}
for (int i=0; i<15; ++i) {
fftsetup[i] = create_fftsetup(i, kFFTRadix2);
}
#else
for (int i=0; i<32; ++i) {
cosTable[i] = 0;
fftWindow[i] = 0;
}
for (int i=3; i<15; ++i) {
cosTable[i] = create_cosTable(i);
fftWindow[i] = create_fftwindow(i);
}
#endif
}
void DoWindowing(int log2n, float * fftbuf, int bufsize)
{
float *win = fftWindow[log2n];
//printf("fail? %i %d /n", log2n, win);
if (!win) return;
float *in = fftbuf - 1;
win--;
for (int i=0; i<bufsize; ++i) {
*++in *= *++win;
}
}
#include "fftlib.c"
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