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author | toma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da> | 2009-11-25 17:56:58 +0000 |
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committer | toma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da> | 2009-11-25 17:56:58 +0000 |
commit | e2de64d6f1beb9e492daf5b886e19933c1fa41dd (patch) | |
tree | 9047cf9e6b5c43878d5bf82660adae77ceee097a /arts/modules/synth/synth_fm_source_impl.cc | |
download | tdemultimedia-e2de64d6f1beb9e492daf5b886e19933c1fa41dd.tar.gz tdemultimedia-e2de64d6f1beb9e492daf5b886e19933c1fa41dd.zip |
Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.
BUG:215923
git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdemultimedia@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da
Diffstat (limited to 'arts/modules/synth/synth_fm_source_impl.cc')
-rw-r--r-- | arts/modules/synth/synth_fm_source_impl.cc | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/arts/modules/synth/synth_fm_source_impl.cc b/arts/modules/synth/synth_fm_source_impl.cc new file mode 100644 index 00000000..a5b74b08 --- /dev/null +++ b/arts/modules/synth/synth_fm_source_impl.cc @@ -0,0 +1,61 @@ + /* + + Copyright (C) 2000 Jeff Tranter + tranter@pobox.com + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public + License as published by the Free Software Foundation; either + version 2 of the License, or (at your option) any later version. + + This library 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public License + along with this library; see the file COPYING.LIB. If not, write to + the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. + + */ + +#include "artsmodulessynth.h" +#include "stdsynthmodule.h" + +using namespace Arts; + +// This is used for frequency modulation. Put your frequency to the +// frequency input and put another signal on the modulator input. Then +// set modlevel to something, say 0.3. The frequency will be modulated +// with modulator then. Just try it. Works nice when you put a +// feedback in there, that means take a combination of the delayed +// output signal from the Synth_FM_SOURCE (you need to put it to some +// oscillator as it only takes the role of Synth_FREQUENCY) and some +// other signal to get good results. Works nicely in combination with +// Synth_WAVE_SIN oscillators. + +class Synth_FM_SOURCE_impl : virtual public Synth_FM_SOURCE_skel, + virtual public StdSynthModule +{ +protected: + static const int SAMPLINGRATE = 44100; + float posn; + +public: + void streamInit() { posn = 0; } + + void calculateBlock(unsigned long samples) + { + for (unsigned long i=0; i<samples; i++) + { + float pinc = frequency[i] / (float) SAMPLINGRATE; + posn += pinc; + if (posn > 1) + posn -= 1; + pos[i] = posn + modulator[i] * modlevel[i]; + } + } +}; + +REGISTER_IMPLEMENTATION(Synth_FM_SOURCE_impl); |