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132 lines
3.2 KiB
132 lines
3.2 KiB
/*
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Copyright (C) 2000 Jeff Tranter
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tranter@pobox.com
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(C) 1999 Stefan Westerfeld
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stefan@space.twc.de
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(C) 2003 Matthias Kretz
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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 as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "artsmodulessynth.h"
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#include "stdsynthmodule.h"
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using namespace std;
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using namespace Arts;
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class Synth_SEQUENCE_impl : virtual public Synth_SEQUENCE_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_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_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) { _seq = newSeq; }
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void streamInit()
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{
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char notea[][4]= {"C-", "C#", "D-", "D#", "E-", "F-", "F#", "G-", "G#", "A-", "A#-", "B-", "\0"};
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char noteb[][3]= {"C-", "Db", "D-", "Eb", "E-", "F-", "Gb", "G-", "Ab", "A-", "Bb", "B-", "\0"};
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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 };
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float zhoch[] = {1,2,4,8,16,32,64,128,256};
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int s = 0, i, oktave;
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char *nptr;
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float f;
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char buffer[1024];
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strncpy(buffer, _seq.c_str(), 1023);
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buffer[ 1023 ] = '\0';
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long bufferlen = strlen(buffer);
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delete[] fsequence;
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delete[] slen;
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fsequence = new float[ bufferlen ];
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slen = new float[ bufferlen ];
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nptr = strtok(buffer, ",;");
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while (nptr)
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{
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if (nptr[3] == ':')
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slen[s] = atof(&nptr[4]);
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else
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slen[s] = 1;
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fprintf(stderr," <%d> %s\n", s, nptr);
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oktave = atol(&nptr[2]);
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nptr[2] = 0;
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f = 0;
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for (i=0; notea[i][0]; i++)
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if (strcmp(nptr,notea[i]) == 0)
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f = freq[i];
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for (i=0; noteb[i][0]; i++)
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if (strcmp(nptr, noteb[i]) == 0)
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f = freq[i];
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f *= zhoch[oktave] / zhoch[4];
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fsequence[s++] = f;
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fprintf(stderr, ">%2.2f\n", f);
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nptr = strtok(NULL,",;");
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}
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fsequence[s] = 0;
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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] == 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_impl);
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