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132 lines
3.1 KiB
132 lines
3.1 KiB
15 years ago
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/* This file is part of the KDE project
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Copyright (C) 2000 Jeff Tranter <tranter@pobox.com>
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2003 Matthias Kretz <kretz@kde.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License version 2
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as published by the Free Software Foundation.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include "artsmodulessynth.h"
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#include "stdsynthmodule.h"
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#include <debug.h>
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using namespace std;
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using namespace Arts;
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class Synth_SEQUENCE_FREQ_impl : virtual public Synth_SEQUENCE_FREQ_skel,
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virtual public StdSynthModule
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{
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protected:
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float _speed;
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string _seq;
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long posn, delay;
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float *fsequence;
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float *slen;
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public:
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Synth_SEQUENCE_FREQ_impl()
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: _speed( 1 )
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, fsequence( 0 )
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, slen( 0 )
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{
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}
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~Synth_SEQUENCE_FREQ_impl()
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{
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delete[] fsequence;
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delete[] slen;
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}
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float speed() { return _speed; }
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void speed(float newSpeed) { _speed = newSpeed; }
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string seq() { return _seq; }
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void seq(const string &newSeq)
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{
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_seq = newSeq;
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parseSeqString();
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}
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void parseSeqString()
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{
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delete[] fsequence;
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delete[] slen;
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long bufferlen = _seq.length();
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fsequence = new float[ bufferlen ];
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slen = new float[ bufferlen ];
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int i = 0;
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int oldpos = 0;
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int pos = _seq.find_first_of( ",;", 0 );
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arts_debug( "tokenizer: parse %s", _seq.c_str() );
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while( pos > 0 )
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{
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string token = _seq.substr( oldpos, pos - oldpos );
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arts_debug( "tokenizer: pos = %d, oldpos = %d, token = %s", pos, oldpos, token.c_str() );
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handleToken( token, i++ );
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oldpos = pos + 1;
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pos = _seq.find_first_of( ",;", oldpos );
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}
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string token = _seq.substr( oldpos, _seq.length() - oldpos );
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arts_debug( "tokenizer: pos = %d, oldpos = %d, token = %s", pos, oldpos, token.c_str() );
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handleToken( token, i++ );
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fsequence[ i ] = -1.0;
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}
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void handleToken( const string & token, int i )
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{
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int colon = token.find( ':' );
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if( colon > -1 )
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{
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slen[ i ] = atof( &token.c_str()[ colon + 1 ] );
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fsequence[ i ] = atof( token.substr( 0, colon ).c_str() );
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}
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else
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{
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slen[ i ] = 1;
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fsequence[ i ] = atof( token.c_str() );
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}
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}
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void streamInit()
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{
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delay = 0;
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posn = 0;
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}
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void calculateBlock(unsigned long samples)
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{
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for (unsigned int i=0; i < samples; i++)
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{
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delay++;
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if (delay > _speed * samplingRate * slen[posn])
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{
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posn++;
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if (fsequence[posn] == -1.0)
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posn = 0;
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delay = 0;
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}
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pos[i] = (int)delay / (_speed * samplingRate * slen[posn]);
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frequency[i] = fsequence[posn];
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}
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}
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};
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REGISTER_IMPLEMENTATION(Synth_SEQUENCE_FREQ_impl);
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// vim: sw=4 ts=4 noet
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