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/*
* stereo_matrix.cpp - stereo-matrix-effect-plugin
*
* Copyright (c) 2008 Paul Giblock <drfaygo/at/gmail/dot/com>
*
* 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 "stereo_matrix.h"
#include "embed.cpp"
extern "C"
{
Plugin::Descriptor PLUGIN_EXPORT stereomatrix_plugin_descriptor =
{
STRINGIFY( PLUGIN_NAME ),
"Stereophonic Matrix",
QT_TRANSLATE_NOOP( "pluginBrowser",
"Plugin for freely manipulating stereo output" ),
"Paul Giblock <drfaygo/at/gmail.com>",
0x0100,
Plugin::Effect,
new PluginPixmapLoader( "logo" ),
NULL,
NULL
} ;
}
stereoMatrixEffect::stereoMatrixEffect(
Model * _parent,
const Descriptor::SubPluginFeatures::Key * _key ) :
Effect( &stereomatrix_plugin_descriptor, _parent, _key ),
m_smControls( this )
{
}
stereoMatrixEffect::~stereoMatrixEffect()
{
}
bool stereoMatrixEffect::processAudioBuffer( sampleFrame * _buf,
const fpp_t _frames )
{
// This appears to be used for determining whether or not to continue processing
// audio with this effect
if( !isEnabled() || !isRunning() )
{
return( false );
}
double out_sum = 0.0;
for( fpp_t f = 0; f < _frames; ++f )
{
const float d = dryLevel();
const float w = wetLevel();
sample_t l = _buf[f][0];
sample_t r = _buf[f][1];
// Init with dry-mix
_buf[f][0] = l * d;
_buf[f][1] = r * d;
// Add it wet
_buf[f][0] += ( m_smControls.m_llModel.value( f ) * l +
m_smControls.m_rlModel.value( f ) * r ) * w;
_buf[f][1] += ( m_smControls.m_lrModel.value( f ) * l +
m_smControls.m_rrModel.value( f ) * r ) * w;
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 stereoMatrixEffect( _parent,
static_cast<const Plugin::Descriptor::SubPluginFeatures::Key *>(
_data ) ) );
}
}
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