mirror of
https://github.com/LMMS/lmms.git
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7c16094811
Fixed some spelling errors found by Lintian while checking the Debian
package of LMMS. Thanks to Patrick Winnertz for pointing out this issue.
(cherry picked from commit 9fd3dacb67)
176 lines
3.7 KiB
C++
176 lines
3.7 KiB
C++
/*
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* stereo_enhancer.cpp - stereo-enhancer-effect-plugin
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*
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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 Linux MultiMedia Studio - http://lmms.sourceforge.net
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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 "stereo_enhancer.h"
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#include "embed.cpp"
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extern "C"
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{
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Plugin::Descriptor PLUGIN_EXPORT stereoenhancer_plugin_descriptor =
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{
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STRINGIFY( PLUGIN_NAME ),
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"StereoEnhancer Effect",
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QT_TRANSLATE_NOOP( "pluginBrowser",
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"Plugin for enhancing stereo separation of a stereo input file" ),
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"Lou Herard <lherard/at/gmail.com>",
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0x0100,
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Plugin::Effect,
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new PluginPixmapLoader( "logo" ),
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NULL,
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NULL
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} ;
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}
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stereoEnhancerEffect::stereoEnhancerEffect(
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Model * _parent,
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const Descriptor::SubPluginFeatures::Key * _key ) :
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Effect( &stereoenhancer_plugin_descriptor, _parent, _key ),
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m_seFX( effectLib::stereoEnhancer( 0.0f ) ),
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m_delayBuffer( new sampleFrame[DEFAULT_BUFFER_SIZE] ),
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m_currFrame( 0 ),
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m_bbControls( this )
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{
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// TODO: Make m_delayBuffer customizable?
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clearMyBuffer();
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}
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stereoEnhancerEffect::~stereoEnhancerEffect()
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{
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if( m_delayBuffer )
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{
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//delete [] m_delayBuffer;
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delete m_delayBuffer;
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}
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m_currFrame = 0;
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}
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bool stereoEnhancerEffect::processAudioBuffer( sampleFrame * _buf,
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const fpp_t _frames )
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{
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// This appears to be used for determining whether or not to continue processing
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// audio with this effect
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double out_sum = 0.0;
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float width;
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int frameIndex = 0;
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if( !isEnabled() || !isRunning() )
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{
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return( false );
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}
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const float d = dryLevel();
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const float w = wetLevel();
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for( fpp_t f = 0; f < _frames; ++f )
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{
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// copy samples into the delay buffer
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m_delayBuffer[m_currFrame][0] = _buf[f][0];
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m_delayBuffer[m_currFrame][1] = _buf[f][1];
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// Get the width knob value from the Stereo Enhancer effect
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width = m_seFX.getWideCoeff();
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// Calculate the correct sample frame for processing
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frameIndex = m_currFrame - width;
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if( frameIndex < 0 )
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{
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// e.g. difference = -10, frameIndex = DBS - 10
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frameIndex += DEFAULT_BUFFER_SIZE;
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}
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//sample_t s[2] = { _buf[f][0], _buf[f][1] }; //Vanilla
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sample_t s[2] = { _buf[f][0], m_delayBuffer[frameIndex][1] }; //Chocolate
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m_seFX.nextSample( s[0], s[1] );
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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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out_sum += _buf[f][0]*_buf[f][0] + _buf[f][1]*_buf[f][1];
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// Update currFrame
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m_currFrame += 1;
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m_currFrame %= DEFAULT_BUFFER_SIZE;
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}
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checkGate( out_sum / _frames );
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if( !isRunning() )
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{
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clearMyBuffer();
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}
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return( isRunning() );
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}
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void stereoEnhancerEffect::clearMyBuffer()
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{
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int i;
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for (i = 0; i < DEFAULT_BUFFER_SIZE; i++)
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{
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m_delayBuffer[i][0] = 0.0f;
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m_delayBuffer[i][1] = 0.0f;
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}
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m_currFrame = 0;
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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 * PLUGIN_EXPORT lmms_plugin_main( Model * _parent, void * _data )
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{
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return( new stereoEnhancerEffect( _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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