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/*
* stereo_enhancer.cpp - stereo-enhancer-effect-plugin
*
* 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 "stereo_enhancer.h"
#include "embed.cpp"
extern "C"
{
Plugin::Descriptor PLUGIN_EXPORT stereoenhancer_plugin_descriptor =
{
STRINGIFY( PLUGIN_NAME ),
"StereoEnhancer Effect",
QT_TRANSLATE_NOOP( "pluginBrowser",
"Plugin for enhancing stereo separation of a stereo input file" ),
"Lou Herard <lherard/at/gmail.com>",
0x0100,
Plugin::Effect,
new PluginPixmapLoader( "logo" ),
NULL,
NULL
} ;
}
stereoEnhancerEffect::stereoEnhancerEffect(
Model * _parent,
const Descriptor::SubPluginFeatures::Key * _key ) :
Effect( &stereoenhancer_plugin_descriptor, _parent, _key ),
m_seFX( effectLib::stereoEnhancer( 0.0f ) ),
m_delayBuffer( new sampleFrame[DEFAULT_BUFFER_SIZE] ),
m_currFrame( 0 ),
m_bbControls( this )
{
// TODO: Make m_delayBuffer customizable?
clearMyBuffer();
}
stereoEnhancerEffect::~stereoEnhancerEffect()
{
if( m_delayBuffer )
{
//delete [] m_delayBuffer;
delete m_delayBuffer;
}
m_currFrame = 0;
}
bool stereoEnhancerEffect::processAudioBuffer( sampleFrame * _buf,
const fpp_t _frames )
{
// This appears to be used for determining whether or not to continue processing
// audio with this effect
double out_sum = 0.0;
float width;
int frameIndex = 0;
if( !isEnabled() || !isRunning() )
{
return( false );
}
const float d = dryLevel();
const float w = wetLevel();
for( fpp_t f = 0; f < _frames; ++f )
{
// copy samples into the delay buffer
m_delayBuffer[m_currFrame][0] = _buf[f][0];
m_delayBuffer[m_currFrame][1] = _buf[f][1];
// Get the width knob value from the Stereo Enhancer effect
width = m_seFX.getWideCoeff();
// Calculate the correct sample frame for processing
frameIndex = m_currFrame - width;
if( frameIndex < 0 )
{
// e.g. difference = -10, frameIndex = DBS - 10
frameIndex += DEFAULT_BUFFER_SIZE;
}
//sample_t s[2] = { _buf[f][0], _buf[f][1] }; //Vanilla
sample_t s[2] = { _buf[f][0], m_delayBuffer[frameIndex][1] }; //Chocolate
m_seFX.nextSample( s[0], s[1] );
_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];
// Update currFrame
m_currFrame += 1;
m_currFrame %= DEFAULT_BUFFER_SIZE;
}
checkGate( out_sum / _frames );
if( !isRunning() )
{
clearMyBuffer();
}
return( isRunning() );
}
void stereoEnhancerEffect::clearMyBuffer()
{
int i;
for (i = 0; i < DEFAULT_BUFFER_SIZE; i++)
{
m_delayBuffer[i][0] = 0.0f;
m_delayBuffer[i][1] = 0.0f;
}
m_currFrame = 0;
}
extern "C"
{
// necessary for getting instance out of shared lib
Plugin * PLUGIN_EXPORT lmms_plugin_main( Model * _parent, void * _data )
{
return( new stereoEnhancerEffect( _parent,
static_cast<const Plugin::Descriptor::SubPluginFeatures::Key *>(
_data ) ) );
}
}
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