diff options
Diffstat (limited to 'arts/modules/synth/synth_sequence_freq_impl.cpp')
-rw-r--r-- | arts/modules/synth/synth_sequence_freq_impl.cpp | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/arts/modules/synth/synth_sequence_freq_impl.cpp b/arts/modules/synth/synth_sequence_freq_impl.cpp new file mode 100644 index 00000000..e3458d74 --- /dev/null +++ b/arts/modules/synth/synth_sequence_freq_impl.cpp @@ -0,0 +1,130 @@ +/* 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 02110-1301, 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); |