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79 lines
2.0 KiB
C++
79 lines
2.0 KiB
C++
/*
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* MultitapEcho.h - a multitap echo delay plugin
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*
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* Copyright (c) 2014 Vesa Kivimäki <contact/dot/diizy/at/nbl/dot/fi>
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* Copyright (c) 2008-2014 Tobias Doerffel <tobydox/at/users.sourceforge.net>
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*
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* This file is part of LMMS - https://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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#ifndef MULTITAP_ECHO_H
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#define MULTITAP_ECHO_H
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#include "Effect.h"
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#include "MultitapEchoControls.h"
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#include "ValueBuffer.h"
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#include "RingBuffer.h"
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#include "lmms_math.h"
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#include "BasicFilters.h"
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class MultitapEchoEffect : public Effect
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{
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public:
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MultitapEchoEffect( Model* parent, const Descriptor::SubPluginFeatures::Key* key );
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virtual ~MultitapEchoEffect();
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virtual bool processAudioBuffer( sampleFrame* buf, const fpp_t frames );
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virtual EffectControls* controls()
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{
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return &m_controls;
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}
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private:
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void updateFilters( int begin, int end );
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void runFilter( sampleFrame * dst, sampleFrame * src, StereoOnePole & filter, const fpp_t frames );
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inline void setFilterFreq( float fc, StereoOnePole & f )
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{
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const float b1 = expf( -2.0f * F_PI * fc );
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f.setCoeffs( 1.0f - b1, b1 );
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}
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int m_stages;
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MultitapEchoControls m_controls;
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float m_amp [32];
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float m_lpFreq [32];
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RingBuffer m_buffer;
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StereoOnePole m_filter [32][4];
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float m_sampleRate;
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float m_sampleRatio;
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sampleFrame * m_work;
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friend class MultitapEchoControls;
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};
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#endif
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