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bfa04c987d
* Centralize standard LMMS plugin logo Previously, every single plugin would have its own copy of this image. Now, these plugins pull it from the theme. I'm not sure it's valuable for this to be themeable, but AFAIK it's the place all the other non-plugin resources are stored, so that's where it goes for now.
160 lines
3.7 KiB
C++
160 lines
3.7 KiB
C++
/*
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* WaveShaper.cpp - waveshaper effect-plugin
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*
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* Copyright (c) 2014 Vesa Kivimäki <contact/dot/diizy/at/nbl/dot/fi>
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* Copyright (c) 2006-2009 Tobias Doerffel <tobydox/at/users.sourceforge.net>
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*
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* This file is part of LMMS - https://lmms.io
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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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 GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program (see COPYING); if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA.
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*
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*/
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#include "WaveShaper.h"
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#include "lmms_math.h"
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#include "embed.h"
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#include "plugin_export.h"
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namespace lmms
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{
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extern "C"
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{
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Plugin::Descriptor PLUGIN_EXPORT waveshaper_plugin_descriptor =
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{
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LMMS_STRINGIFY( PLUGIN_NAME ),
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"Waveshaper Effect",
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QT_TRANSLATE_NOOP( "PluginBrowser",
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"plugin for waveshaping" ),
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"Vesa Kivimäki <contact/dot/diizy/at/nbl/dot/fi>",
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0x0100,
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Plugin::Type::Effect,
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new PixmapLoader("lmms-plugin-logo"),
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nullptr,
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nullptr,
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} ;
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}
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WaveShaperEffect::WaveShaperEffect( Model * _parent,
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const Descriptor::SubPluginFeatures::Key * _key ) :
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Effect( &waveshaper_plugin_descriptor, _parent, _key ),
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m_wsControls( this )
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{
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}
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Effect::ProcessStatus WaveShaperEffect::processImpl(SampleFrame* buf, const fpp_t frames)
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{
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// variables for effect
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int i = 0;
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const float d = dryLevel();
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const float w = wetLevel();
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float input = m_wsControls.m_inputModel.value();
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float output = m_wsControls.m_outputModel.value();
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const float * samples = m_wsControls.m_wavegraphModel.samples();
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const bool clip = m_wsControls.m_clipModel.value();
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ValueBuffer *inputBuffer = m_wsControls.m_inputModel.valueBuffer();
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ValueBuffer *outputBufer = m_wsControls.m_outputModel.valueBuffer();
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int inputInc = inputBuffer ? 1 : 0;
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int outputInc = outputBufer ? 1 : 0;
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const float *inputPtr = inputBuffer ? &( inputBuffer->values()[ 0 ] ) : &input;
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const float *outputPtr = outputBufer ? &( outputBufer->values()[ 0 ] ) : &output;
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for (fpp_t f = 0; f < frames; ++f)
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{
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auto s = std::array{buf[f][0], buf[f][1]};
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// apply input gain
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s[0] *= *inputPtr;
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s[1] *= *inputPtr;
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// clip if clip enabled
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if( clip )
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{
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s[0] = qBound( -1.0f, s[0], 1.0f );
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s[1] = qBound( -1.0f, s[1], 1.0f );
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}
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// start effect
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for( i=0; i <= 1; ++i )
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{
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const int lookup = static_cast<int>( qAbs( s[i] ) * 200.0f );
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const float frac = fraction( qAbs( s[i] ) * 200.0f );
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const float posneg = s[i] < 0 ? -1.0f : 1.0f;
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if( lookup < 1 )
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{
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s[i] = frac * samples[0] * posneg;
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}
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else if( lookup < 200 )
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{
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s[i] = std::lerp(samples[lookup - 1], samples[lookup], frac) * posneg;
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}
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else
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{
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s[i] *= samples[199];
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}
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}
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// apply output gain
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s[0] *= *outputPtr;
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s[1] *= *outputPtr;
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// mix wet/dry signals
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buf[f][0] = d * buf[f][0] + w * s[0];
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buf[f][1] = d * buf[f][1] + w * s[1];
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outputPtr += outputInc;
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inputPtr += inputInc;
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}
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return ProcessStatus::ContinueIfNotQuiet;
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}
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extern "C"
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{
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// necessary for getting instance out of shared lib
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PLUGIN_EXPORT Plugin * lmms_plugin_main( Model * _parent, void * _data )
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{
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return( new WaveShaperEffect( _parent,
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static_cast<const Plugin::Descriptor::SubPluginFeatures::Key *>(
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_data ) ) );
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}
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}
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} // namespace lmms
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