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/*
Copyright (C) 2000 Stefan Westerfeld
[email protected]
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include <stdlib.h>
#include "artsmodulessynth.h"
#include "stdsynthmodule.h"
using namespace Arts;
namespace Arts {
#define NOISE_SIZE 8192
class Synth_NOISE_impl : virtual public Synth_NOISE_skel,
virtual public StdSynthModule
{
static float noise[NOISE_SIZE];
static bool noiseInit;
unsigned long pos;
public:
Synth_NOISE_impl()
{
if(!noiseInit)
{
for(unsigned long i=0;i<NOISE_SIZE;i++)
noise[i] = ((float)rand()/(float)RAND_MAX)*2.0-1.0;
noiseInit = true;
}
}
void calculateBlock(unsigned long samples)
{
unsigned long i;
pos = rand();
for(i=0;i<samples;i++) outvalue[i] = noise[pos++ & (NOISE_SIZE-1)];
}
};
float Synth_NOISE_impl::noise[8192];
bool Synth_NOISE_impl::noiseInit = false;
REGISTER_IMPLEMENTATION(Synth_NOISE_impl);
}
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