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/*
Copyright (C) 2000 Jeff Tranter
[email protected]
(C) 1999 Stefan Westerfeld
[email protected]
(C) 2003 Matthias Kretz
[email protected]
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "artsmodulessynth.h"
#include "stdsynthmodule.h"
using namespace std;
using namespace Arts;
class Synth_SEQUENCE_impl : virtual public Synth_SEQUENCE_skel,
virtual public StdSynthModule
{
protected:
float _speed;
string _seq;
long posn, delay;
float *fsequence;
float *slen;
public:
Synth_SEQUENCE_impl()
: _speed( 1 )
, fsequence( 0 )
, slen( 0 )
{
}
~Synth_SEQUENCE_impl()
{
delete [] fsequence;
delete [] slen;
}
float speed() { return _speed; }
void speed(float newSpeed) { _speed = newSpeed; }
string seq() { return _seq; }
void seq(const string &newSeq) { _seq = newSeq; }
void streamInit()
{
char notea[][4]= {"C-", "C#", "D-", "D#", "E-", "F-", "F#", "G-", "G#", "A-", "A#-", "B-", "\0"};
char noteb[][3]= {"C-", "Db", "D-", "Eb", "E-", "F-", "Gb", "G-", "Ab", "A-", "Bb", "B-", "\0"};
float freq[] = {261.7,277.2,293.7,311.2,329.7,349.3,370.0,392.0,415.3,440.0, 466.2, 493.9, 0 };
float zhoch[] = {1,2,4,8,16,32,64,128,256};
int s = 0, i, oktave;
char *nptr;
float f;
char buffer[1024];
strncpy(buffer, _seq.c_str(), 1023);
buffer[ 1023 ] = '\0';
long bufferlen = strlen(buffer);
delete[] fsequence;
delete[] slen;
fsequence = new float[ bufferlen ];
slen = new float[ bufferlen ];
nptr = strtok(buffer, ",;");
while (nptr)
{
if (nptr[3] == ':')
slen[s] = atof(&nptr[4]);
else
slen[s] = 1;
fprintf(stderr," <%d> %s\n", s, nptr);
oktave = atol(&nptr[2]);
nptr[2] = 0;
f = 0;
for (i=0; notea[i][0]; i++)
if (strcmp(nptr,notea[i]) == 0)
f = freq[i];
for (i=0; noteb[i][0]; i++)
if (strcmp(nptr, noteb[i]) == 0)
f = freq[i];
f *= zhoch[oktave] / zhoch[4];
fsequence[s++] = f;
fprintf(stderr, ">%2.2f\n", f);
nptr = strtok(NULL,",;");
}
fsequence[s] = 0;
delay = 0;
posn = 0;
}
void calculateBlock(unsigned long samples)
{
for (unsigned int i=0; i < samples; i++)
{
delay++;
if (delay > _speed * samplingRate * slen[posn])
{
posn++;
if (fsequence[posn] == 0)
posn = 0;
delay = 0;
}
pos[i] = (int)delay / (_speed * samplingRate * slen[posn]);
frequency[i] = fsequence[posn];
}
}
};
REGISTER_IMPLEMENTATION(Synth_SEQUENCE_impl);
// vim: sw=4 ts=4 noet
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