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/* This file is part of the KDE project
Copyright (C) 2000 Jeff Tranter <tranter@pobox.com>
2003 Matthias Kretz <kretz@kde.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License version 2
as published by the Free Software Foundation.
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 02111-1307, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include "artsmodulessynth.h"
#include "stdsynthmodule.h"
#include <debug.h>
using namespace std;
using namespace Arts;
class Synth_SEQUENCE_FREQ_impl : virtual public Synth_SEQUENCE_FREQ_skel,
virtual public StdSynthModule
{
protected:
float _speed;
string _seq;
long posn, delay;
float *fsequence;
float *slen;
public:
Synth_SEQUENCE_FREQ_impl()
: _speed( 1 )
, fsequence( 0 )
, slen( 0 )
{
}
~Synth_SEQUENCE_FREQ_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;
parseSeqString();
}
void parseSeqString()
{
delete[] fsequence;
delete[] slen;
long bufferlen = _seq.length();
fsequence = new float[ bufferlen ];
slen = new float[ bufferlen ];
int i = 0;
int oldpos = 0;
int pos = _seq.find_first_of( ",;", 0 );
arts_debug( "tokenizer: parse %s", _seq.c_str() );
while( pos > 0 )
{
string token = _seq.substr( oldpos, pos - oldpos );
arts_debug( "tokenizer: pos = %d, oldpos = %d, token = %s", pos, oldpos, token.c_str() );
handleToken( token, i++ );
oldpos = pos + 1;
pos = _seq.find_first_of( ",;", oldpos );
}
string token = _seq.substr( oldpos, _seq.length() - oldpos );
arts_debug( "tokenizer: pos = %d, oldpos = %d, token = %s", pos, oldpos, token.c_str() );
handleToken( token, i++ );
fsequence[ i ] = -1.0;
}
void handleToken( const string & token, int i )
{
int colon = token.find( ':' );
if( colon > -1 )
{
slen[ i ] = atof( &token.c_str()[ colon + 1 ] );
fsequence[ i ] = atof( token.substr( 0, colon ).c_str() );
}
else
{
slen[ i ] = 1;
fsequence[ i ] = atof( token.c_str() );
}
}
void streamInit()
{
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] == -1.0)
posn = 0;
delay = 0;
}
pos[i] = (int)delay / (_speed * samplingRate * slen[posn]);
frequency[i] = fsequence[posn];
}
}
};
REGISTER_IMPLEMENTATION(Synth_SEQUENCE_FREQ_impl);
// vim: sw=4 ts=4 noet
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