mirror of
https://github.com/LMMS/lmms.git
synced 2026-01-25 14:58:07 -05:00
4c82ba22a9
corrected the typeo's, Used sampleFrame instead of float* making the code cleaner. Set up a socket to change the samplerate where required. Stopped using malloc ( yeah that was bad practice on my part ). Now using lmms_Math.h and the predefined versions of F_PI and F_2PI, I didn't know data from the knobs etc. was not updated over the course of a buffer, so have moved outside the processing loop, made appropriate functions inline, used sinf. Multiplication has replaced division where possible, zeroing of the buffer has been removed, as redundant.
127 lines
3.2 KiB
C++
127 lines
3.2 KiB
C++
/*
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* delayeffect.cpp - definition of the DelayEffect class. The Delay Plugin
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*
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* Copyright (c) 2014 David French <dave/dot/french3/at/googlemail/dot/com>
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*
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* This file is part of LMMS - http://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 "delayeffect.h"
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#include "engine.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 delay_plugin_descriptor =
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{
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STRINGIFY( PLUGIN_NAME ),
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"Delay",
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QT_TRANSLATE_NOOP( "pluginBrowser", "A native delay plugin" ),
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"Dave French <contact/dot/dave/dot/french3/at/googlemail/dot/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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DelayEffect::DelayEffect( Model* parent, const Plugin::Descriptor::SubPluginFeatures::Key* key ) :
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Effect( &delay_plugin_descriptor, parent, key ),
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m_delayControls( this )
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{
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m_delay = 0;
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m_delay = new StereoDelay( 192000 * 20 );
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m_lfo = new Lfo( engine::mixer()->processingSampleRate() );
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connect( engine::mixer(), SIGNAL( sampleRateChanged() ), this, SLOT( sampleRateChanged() ) );
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}
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DelayEffect::~DelayEffect()
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{
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if( m_delay )
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{
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delete m_delay;
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}
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if( m_lfo )
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{
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delete m_lfo;
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}
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}
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bool DelayEffect::processAudioBuffer(sampleFrame* buf, const fpp_t frames)
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{
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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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double outSum = 0.0;
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const float d = dryLevel();
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const float w = wetLevel();
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m_lfo->setAmplitude( m_delayControls.m_lfoAmountModel.value() );
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m_lfo->setFrequency( 1.0 / m_delayControls.m_lfoTimeModel.value() );
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m_delay->setFeedback( m_delayControls.m_feedbackModel.value() );
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sample_t dryS[2];
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for( fpp_t f = 0; f < frames; ++f )
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{
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dryS[0] = buf[f][0];
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dryS[1] = buf[f][1];
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m_delay->setLength( m_delayControls.m_delayTimeModel.value(f) * engine::mixer()->processingSampleRate() * m_lfo->tick() );
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m_delay->tick( buf[f] );
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buf[f][0] = ( d * dryS[0] ) + ( w * buf[f][0] );
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buf[f][1] = ( d * dryS[1] ) + ( w * buf[f][1] );
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outSum += buf[f][0]*buf[f][0] + buf[f][1]*buf[f][1];
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}
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checkGate( outSum / frames );
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return isRunning();
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}
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void DelayEffect::sampleRateChanged()
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{
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m_lfo->setSamplerate(engine::mixer()->processingSampleRate());
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}
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extern "C"
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{
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//needed for getting plugin 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 DelayEffect( parent , static_cast<const Plugin::Descriptor::SubPluginFeatures::Key *>( data ) );
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}
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}}
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