diff options
author | Michele Calgaro <michele.calgaro@yahoo.it> | 2020-12-08 22:26:17 +0900 |
---|---|---|
committer | Michele Calgaro <michele.calgaro@yahoo.it> | 2020-12-08 22:26:17 +0900 |
commit | fce86b22a2367f1be1f9aae5e1ba3d18d1371b74 (patch) | |
tree | 707fe84fef0569a152e632ce1e16407f9d19a3d2 /arts/modules/synth/synth_shelve_cutoff_impl.cpp | |
parent | 41fa1afc2c571b909acd0312e4eebb4a0b21e3c2 (diff) | |
download | tdemultimedia-fce86b22a2367f1be1f9aae5e1ba3d18d1371b74.tar.gz tdemultimedia-fce86b22a2367f1be1f9aae5e1ba3d18d1371b74.zip |
Renaming of files in preparation for code style tools.
Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
Diffstat (limited to 'arts/modules/synth/synth_shelve_cutoff_impl.cpp')
-rw-r--r-- | arts/modules/synth/synth_shelve_cutoff_impl.cpp | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/arts/modules/synth/synth_shelve_cutoff_impl.cpp b/arts/modules/synth/synth_shelve_cutoff_impl.cpp new file mode 100644 index 00000000..01880b6c --- /dev/null +++ b/arts/modules/synth/synth_shelve_cutoff_impl.cpp @@ -0,0 +1,71 @@ +/* + + Copyright (C) 2000 Stefan Westerfeld + stefan@space.twc.de + + 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., 51 Franklin Street, Fifth Floor, + Boston, MA 02110-1301, USA. + + */ + +#include "artsmodulessynth.h" +#include "stdsynthmodule.h" +#include "c_filter_stuff.h" + +using namespace Arts; + +class Synth_SHELVE_CUTOFF_impl : virtual public Synth_SHELVE_CUTOFF_skel, + virtual public StdSynthModule +{ +protected: + filter f; +public: + void streamInit(); + void calculateBlock(unsigned long samples); +}; + +REGISTER_IMPLEMENTATION(Synth_SHELVE_CUTOFF_impl); + +void Synth_SHELVE_CUTOFF_impl::streamInit() +{ + initfilter(&f); +} + +void Synth_SHELVE_CUTOFF_impl::calculateBlock(unsigned long samples) +{ + float filterfrequency = frequency[0]; + + // the shelve-lowpass-filter is extremely sensitive to frequencies which + // are out of it's range (it produces NaN's then) so we'll be careful ;) + if(filterfrequency > 22000.0) filterfrequency = 22000.0; + if(filterfrequency < 1.0) filterfrequency = 1.0; + setfilter_shelvelowpass(&f,filterfrequency,80.0); + + unsigned long i; + + for(i=0;i<samples;i++) + { + // better paste applyfilter here instead of: + // *outsig++ = 0.95 * applyfilter(&f,*insig++); + f.x = invalue[i]; + f.y = f.cx * f.x + f.cx1 * f.x1 + f.cx2 * f.x2 + + f.cy1 * f.y1 + f.cy2 * f.y2; + f.x2 = f.x1; + f.x1 = f.x; + f.y2 = f.y1; + f.y1 = f.y; + outvalue[i] = 0.95 * f.y; + } +} |