Watsyn.h

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/*
 * Watsyn.h - a 4-oscillator modulating wavetable synth
 *
 * Copyright (c) 2014 Vesa Kivimäki <contact/dot/diizy/at/nbl/dot/fi>
 *
 * 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 WATSYN_H
#define WATSYN_H
 
#include "AudioResampler.h"
#include "Instrument.h"
#include "InstrumentView.h"
#include "Graph.h"
#include "AutomatableModel.h"
#include "TempoSyncKnob.h"
#include <samplerate.h>
 
namespace lmms
{
 
#define A1ROW 26
#define A2ROW 49
#define B1ROW 72
#define B2ROW 95
 
 
const int GRAPHLEN = 220; // don't change - must be same as the size of the widget
 
const int WAVERATIO = 32; // oversampling ratio
 
const int WAVELEN = GRAPHLEN * WAVERATIO;
const int PMOD_AMT = WAVELEN / 2;
 
const int       MOD_MIX = 0;
const int       MOD_AM = 1;
const int       MOD_RM = 2;
const int       MOD_PM = 3;
const int  NUM_MODS = 4;
 
const int       A1_OSC = 0;
const int       A2_OSC = 1;
const int       B1_OSC = 2;
const int       B2_OSC = 3;
const int       NUM_OSCS = 4;
 
class WatsynInstrument;
 
namespace gui
{
class AutomatableButtonGroup;
class PixmapButton;
class WatsynView;
}
 
class WatsynObject
{
public:
        WatsynObject(   float * _A1wave, float * _A2wave,
                                        float * _B1wave, float * _B2wave,
                                        int _amod, int _bmod, const sample_rate_t _samplerate, NotePlayHandle * _nph, f_cnt_t _frames,
                                        WatsynInstrument * _w );
        virtual ~WatsynObject();
 
        void renderOutput( f_cnt_t _frames );
 
        inline SampleFrame* abuf() const
        {
                return m_abuf;
        }
        inline SampleFrame* bbuf() const
        {
                return m_bbuf;
        }
        inline sample_rate_t samplerate() const
        {
                return m_samplerate;
        }
 
private:
        int m_amod;
        int m_bmod;
 
        const sample_rate_t m_samplerate;
        NotePlayHandle * m_nph;
 
        f_cnt_t m_fpp;
 
        WatsynInstrument * m_parent;
 
        SampleFrame* m_abuf;
        SampleFrame* m_bbuf;
 
        float m_lphase [NUM_OSCS];
        float m_rphase [NUM_OSCS];
 
        float m_A1wave [WAVELEN];
        float m_A2wave [WAVELEN];
        float m_B1wave [WAVELEN];
        float m_B2wave [WAVELEN];
};
 
class WatsynInstrument : public Instrument
{
        Q_OBJECT
public:
        WatsynInstrument( InstrumentTrack * _instrument_track );
        ~WatsynInstrument() override = default;
 
        void playNote( NotePlayHandle * _n,
                                                SampleFrame* _working_buffer ) override;
        void deleteNotePluginData( NotePlayHandle * _n ) override;
 
 
        void saveSettings( QDomDocument & _doc,
                                                        QDomElement & _this ) override;
        void loadSettings( const QDomElement & _this ) override;
 
        QString nodeName() const override;
 
        float desiredReleaseTimeMs() const override
        {
                return 1.5f;
        }
 
        gui::PluginView* instantiateView( QWidget * _parent ) override;
 
public slots:
        void updateVolumes();
        void updateFreqA1();
        void updateFreqA2();
        void updateFreqB1();
        void updateFreqB2();
        void updateWaveA1();
        void updateWaveA2();
        void updateWaveB1();
        void updateWaveB2();
 
protected:
        float m_lvol [NUM_OSCS];
    float m_rvol [NUM_OSCS];
 
        float m_lfreq [NUM_OSCS];
        float m_rfreq [NUM_OSCS];
 
private:
        inline float leftCh( float _vol, float _pan )
        {
                return ( _pan <= 0 ? 1.0 : 1.0 - ( _pan / 100.0 ) ) * _vol / 100.0;
        }
 
        inline float rightCh( float _vol, float _pan )
        {
                return ( _pan >= 0 ? 1.0 : 1.0 + ( _pan / 100.0 ) ) * _vol / 100.0;
        }
 
        // memcpy utilizing libsamplerate (src) for sinc interpolation
        inline void srccpy(float* _dst, float* _src)
        {
                auto srcIndex = f_cnt_t{0};
                auto dstIndex = f_cnt_t{0};
 
                m_resampler.reset();
                m_resampler.setRatio(WAVERATIO);
 
                while (dstIndex < WAVELEN)
                {
                        const auto input = InterleavedBufferView<const float, 1>{_src + srcIndex, GRAPHLEN - srcIndex};
                        const auto output = InterleavedBufferView<float, 1>{_dst + dstIndex, WAVELEN - dstIndex};
                        const auto result = m_resampler.process(input, output);
 
                        srcIndex = (srcIndex + result.inputFramesUsed) % GRAPHLEN;
                        dstIndex += result.outputFramesGenerated;
                }
        }
 
        // memcpy utilizing cubic interpolation
/*      inline void cipcpy( float * _dst, float * _src )
        {
                // calculate cyclic tangents
                float tang[GRAPHLEN];
                tang[0] = ( _src[1] - _src[ GRAPHLEN - 1] ) / 2;
                tang[ GRAPHLEN - 1 ] = ( _src[0] - _src[ GRAPHLEN - 2 ] ) / 2;
                for( int i = 1; i < GRAPHLEN-1; i++ )
                {
                        tang[i] = ( _src[i+1] - _src[i-1] ) / 2;
                }
                
                // calculate cspline
                for( int i=0; i < WAVELEN; i++ )
                {
                        const float s1 = _src[ i / WAVERATIO ];
                        const float s2 = _src[ ( i / WAVERATIO + 1 ) % GRAPHLEN ];
                        const float m1 = tang[ i / WAVERATIO ];
                        const float m2 = tang[ ( i / WAVERATIO + 1 ) % GRAPHLEN ];
                        
                        const float x = static_cast<float>( i % WAVERATIO ) / WAVERATIO;
                        const float x2 = x * x;
                        const float x3 = x * x * x;
                        
                        _dst[i] = ( ( x3 * 2.0 - x2 * 3.0 + 1.0 ) * s1 ) +
                                ( ( x3 * -2.0 + x2 * 3.0 ) * s2 ) +
                                ( ( x3 - x2 * 2 + x ) * m1 ) +
                                ( ( x3 - x2 ) * m2 );           
                }
        }*/
 
        AudioResampler m_resampler = AudioResampler{AudioResampler::Mode::SincFastest, 1};
 
        FloatModel a1_vol;
        FloatModel a2_vol;
        FloatModel b1_vol;
        FloatModel b2_vol;
 
        FloatModel a1_pan;
        FloatModel a2_pan;
        FloatModel b1_pan;
        FloatModel b2_pan;
 
        FloatModel a1_mult;
        FloatModel a2_mult;
        FloatModel b1_mult;
        FloatModel b2_mult;
 
        FloatModel a1_ltune;
        FloatModel a2_ltune;
        FloatModel b1_ltune;
        FloatModel b2_ltune;
 
        FloatModel a1_rtune;
        FloatModel a2_rtune;
        FloatModel b1_rtune;
        FloatModel b2_rtune;
 
        graphModel a1_graph;
        graphModel a2_graph;
        graphModel b1_graph;
        graphModel b2_graph;
 
        FloatModel m_abmix;
 
        FloatModel m_envAmt;
 
        TempoSyncKnobModel m_envAtt;
        TempoSyncKnobModel m_envHold;
        TempoSyncKnobModel m_envDec;
 
        FloatModel m_xtalk;
 
        IntModel m_amod;
        IntModel m_bmod;
 
        IntModel m_selectedGraph;
        
        float A1_wave [WAVELEN];
        float A2_wave [WAVELEN];
        float B1_wave [WAVELEN];
        float B2_wave [WAVELEN];
 
        friend class WatsynObject;
        friend class gui::WatsynView;
};
 
 
namespace gui
{
 
 
class WatsynView : public InstrumentViewFixedSize
{
        Q_OBJECT
public:
        WatsynView( Instrument * _instrument,
                                        QWidget * _parent );
        ~WatsynView() override = default;
 
protected slots:
        void updateLayout();
 
        void sinWaveClicked();
        void triWaveClicked();
        void sawWaveClicked();
        void sqrWaveClicked();
 
        void smoothClicked();
        void normalizeClicked();
        void invertClicked();
        void phaseLeftClicked();
        void phaseRightClicked();
        void loadClicked();
 
private:
        void modelChanged() override;
 
        template<class T = Knob>
        auto makeKnob(int x, int y, const QString& hint, const QString& unit,
                const QString& objName) -> T*
        {
                T* knob = new T(KnobType::Styled, this);
                knob->move(x, y);
                knob->setHintText(hint, unit);
                knob->setObjectName(objName);
                knob->setFixedSize(19, 19);
                return knob;
        };
 
// knobs
        Knob * a1_volKnob;
        Knob * a2_volKnob;
        Knob * b1_volKnob;
        Knob * b2_volKnob;
 
        Knob * a1_panKnob;
        Knob * a2_panKnob;
        Knob * b1_panKnob;
        Knob * b2_panKnob;
 
        Knob * a1_multKnob;
        Knob * a2_multKnob;
        Knob * b1_multKnob;
        Knob * b2_multKnob;
 
        Knob * a1_ltuneKnob;
        Knob * a2_ltuneKnob;
        Knob * b1_ltuneKnob;
        Knob * b2_ltuneKnob;
 
        Knob * a1_rtuneKnob;
        Knob * a2_rtuneKnob;
        Knob * b1_rtuneKnob;
        Knob * b2_rtuneKnob;
 
        Knob * m_abmixKnob;
 
        Knob * m_envAmtKnob;
 
        TempoSyncKnob * m_envAttKnob;
        TempoSyncKnob * m_envHoldKnob;
        TempoSyncKnob * m_envDecKnob;
 
        Knob * m_xtalkKnob;
 
        AutomatableButtonGroup * m_selectedGraphGroup;
        AutomatableButtonGroup * m_aModGroup;
        AutomatableButtonGroup * m_bModGroup;
 
        Graph * a1_graph;
        Graph * a2_graph;
        Graph * b1_graph;
        Graph * b2_graph;
 
        PixmapButton * m_sinWaveButton;
        PixmapButton * m_triWaveButton;
        PixmapButton * m_sawWaveButton;
        PixmapButton * m_sqrWaveButton;
        PixmapButton * m_normalizeButton;
        PixmapButton * m_invertButton;
        PixmapButton * m_smoothButton;
        PixmapButton * m_phaseLeftButton;
        PixmapButton * m_phaseRightButton;
        PixmapButton * m_loadButton;
 
};
 
 
} // namespace gui
 
} // namespace lmms
 
#endif