mirror of
https://github.com/LMMS/lmms.git
synced 2026-01-24 14:28:21 -05:00
162 lines
3.5 KiB
C++
162 lines
3.5 KiB
C++
/*
|
|
* waveshaper.cpp - waveshaper effect-plugin
|
|
*
|
|
* Copyright (c) 2014 Vesa Kivimäki <contact/dot/diizy/at/nbl/dot/fi>
|
|
* Copyright (c) 2006-2009 Tobias Doerffel <tobydox/at/users.sourceforge.net>
|
|
*
|
|
* This file is part of Linux MultiMedia Studio - http://lmms.sourceforge.net
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* 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 (see COPYING); if not, write to the
|
|
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
|
|
* Boston, MA 02110-1301 USA.
|
|
*
|
|
*/
|
|
|
|
|
|
#include "waveshaper.h"
|
|
#include <math.h>
|
|
#include "embed.cpp"
|
|
|
|
|
|
extern "C"
|
|
{
|
|
|
|
Plugin::Descriptor PLUGIN_EXPORT waveshaper_plugin_descriptor =
|
|
{
|
|
STRINGIFY( PLUGIN_NAME ),
|
|
"Waveshaper Effect",
|
|
QT_TRANSLATE_NOOP( "pluginBrowser",
|
|
"plugin for waveshaping" ),
|
|
"Vesa Kivimäki <contact/dot/diizy/at/nbl/dot/fi>",
|
|
0x0100,
|
|
Plugin::Effect,
|
|
new PluginPixmapLoader( "logo" ),
|
|
NULL,
|
|
NULL
|
|
} ;
|
|
|
|
}
|
|
|
|
|
|
|
|
waveShaperEffect::waveShaperEffect( Model * _parent,
|
|
const Descriptor::SubPluginFeatures::Key * _key ) :
|
|
Effect( &waveshaper_plugin_descriptor, _parent, _key ),
|
|
m_wsControls( this )
|
|
{
|
|
}
|
|
|
|
|
|
|
|
|
|
waveShaperEffect::~waveShaperEffect()
|
|
{
|
|
}
|
|
|
|
|
|
|
|
|
|
bool waveShaperEffect::processAudioBuffer( sampleFrame * _buf,
|
|
const fpp_t _frames )
|
|
{
|
|
if( !isEnabled() || !isRunning () )
|
|
{
|
|
return( false );
|
|
}
|
|
|
|
// variables for effect
|
|
int i = 0;
|
|
float lookup;
|
|
float frac;
|
|
float posneg;
|
|
|
|
double out_sum = 0.0;
|
|
const float d = dryLevel();
|
|
const float w = wetLevel();
|
|
for( fpp_t f = 0; f < _frames; ++f )
|
|
{
|
|
sample_t s[2] = { _buf[f][0], _buf[f][1] };
|
|
|
|
// apply input gain
|
|
s[0] *= m_wsControls.m_inputModel.value();
|
|
s[1] *= m_wsControls.m_inputModel.value();
|
|
|
|
// clip if clip enabled
|
|
if( m_wsControls.m_clipModel.value() )
|
|
{
|
|
s[0] = qBound( -1.0f, s[0], 1.0f );
|
|
s[1] = qBound( -1.0f, s[1], 1.0f );
|
|
}
|
|
|
|
// start effect
|
|
|
|
for ( i=0; i <= 1; ++i )
|
|
{
|
|
lookup = fabsf( s[i] ) * 200.0f;
|
|
posneg = s[i] < 0 ? -1.0f : 1.0f;
|
|
|
|
if ( lookup < 1 )
|
|
{
|
|
frac = lookup - truncf(lookup);
|
|
s[i] = frac * m_wsControls.m_wavegraphModel.samples()[0] * posneg;
|
|
}
|
|
else
|
|
if ( lookup < 200 )
|
|
{
|
|
frac = lookup - truncf(lookup);
|
|
s[i] =
|
|
(( (1.0f-frac) * m_wsControls.m_wavegraphModel.samples()[ (int)truncf(lookup) - 1 ] ) +
|
|
( frac * m_wsControls.m_wavegraphModel.samples()[ (int)truncf(lookup) ] ))
|
|
* posneg;
|
|
}
|
|
else
|
|
{
|
|
s[i] *= m_wsControls.m_wavegraphModel.samples()[199];
|
|
}
|
|
}
|
|
|
|
// apply output gain
|
|
s[0] *= m_wsControls.m_outputModel.value();
|
|
s[1] *= m_wsControls.m_outputModel.value();
|
|
|
|
// mix wet/dry signals
|
|
_buf[f][0] = d * _buf[f][0] + w * s[0];
|
|
_buf[f][1] = d * _buf[f][1] + w * s[1];
|
|
|
|
out_sum += _buf[f][0]*_buf[f][0] + _buf[f][1]*_buf[f][1];
|
|
}
|
|
|
|
checkGate( out_sum / _frames );
|
|
|
|
return( isRunning() );
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
extern "C"
|
|
{
|
|
|
|
// necessary for getting instance out of shared lib
|
|
Plugin * PLUGIN_EXPORT lmms_plugin_main( Model * _parent, void * _data )
|
|
{
|
|
return( new waveShaperEffect( _parent,
|
|
static_cast<const Plugin::Descriptor::SubPluginFeatures::Key *>(
|
|
_data ) ) );
|
|
}
|
|
|
|
}
|
|
|