Bitcrush.h

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/*
 * Bitcrush.h - A native bitcrusher
 *
 * Copyright (c) 2014 Vesa Kivimäki <contact/dot/diizy/at/nbl/dot/fi>
 * Copyright (c) 2006-2014 Tobias Doerffel <tobydox/at/users.sourceforge.net>
 *
 * This file is part of LMMS - https://lmms.io
 *
 * 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.
 *
 */
 
 
#ifndef BITCRUSH_H
#define BITCRUSH_H
 
#include "Effect.h"
#include "BitcrushControls.h"
#include "BasicFilters.h"
 
 
namespace lmms
{
 
 
class BitcrushEffect : public Effect
{
public:
    BitcrushEffect( Model* parent, const Descriptor::SubPluginFeatures::Key* key );
    ~BitcrushEffect() override;
 
    ProcessStatus processImpl(SampleFrame* buf, const f_cnt_t frames) override;
 
    EffectControls* controls() override
    {
        return &m_controls;
    }
 
private:
    void sampleRateChanged();
    float depthCrush( float in );
    float noise( float amt );
 
    BitcrushControls m_controls;
    
    SampleFrame* m_buffer;
    float m_sampleRate;
    StereoLinkwitzRiley m_filter;
    
    float m_bitCounterL;
    float m_rateCoeffL;
    float m_bitCounterR;
    float m_rateCoeffR;
    bool m_rateEnabled;
    
    float m_left;
    float m_right;
 
    int m_levels;
    float m_levelsRatio;
    bool m_depthEnabled;
    
    float m_inGain;
    float m_outGain;
    float m_outClip;
 
    bool m_needsUpdate;
    
    int m_silenceCounter;
 
    friend class BitcrushControls;
};
 
 
} // namespace lmms
 
#endif