engines/common/AbstractVoice.h

/***************************************************************************
 *                                                                         *
 *   LinuxSampler - modular, streaming capable sampler                     *
 *                                                                         *
 *   Copyright (C) 2003,2004 by Benno Senoner and Christian Schoenebeck    *
 *   Copyright (C) 2005-2008 Christian Schoenebeck                         *
 *   Copyright (C) 2009-2012 Christian Schoenebeck and Grigor Iliev        *
 *                                                                         *
 *   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; if not, write to the Free Software           *
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston,                 *
 *   MA  02111-1307  USA                                                   *
 ***************************************************************************/

#ifndef __LS_ABSTRACTVOICE_H__
#define __LS_ABSTRACTVOICE_H__

#include "Voice.h"

#include "../../common/global_private.h"
#include "../AbstractEngineChannel.h"
#include "LFOBase.h"
#include "Fade.h"
#include "../EngineBase.h"
#include "EG.h"
#include "../gig/EGADSR.h"
#include "../gig/EGDecay.h"
#include "../gig/SmoothVolume.h"
#include "../gig/Synthesizer.h"
#include "../gig/Profiler.h"
#include "SignalUnitRack.h"

// include the appropriate (unsigned) triangle LFO implementation
#if CONFIG_UNSIGNED_TRIANG_ALGO == INT_MATH_SOLUTION
# include "LFOTriangleIntMath.h"
#elif CONFIG_UNSIGNED_TRIANG_ALGO == INT_ABS_MATH_SOLUTION
# include "LFOTriangleIntAbsMath.h"
#elif CONFIG_UNSIGNED_TRIANG_ALGO == DI_HARMONIC_SOLUTION
# include "LFOTriangleDiHarmonic.h"
#else
# error "Unknown or no (unsigned) triangle LFO implementation selected!"
#endif

// include the appropriate (signed) triangle LFO implementation
#if CONFIG_SIGNED_TRIANG_ALGO == INT_MATH_SOLUTION
# include "LFOTriangleIntMath.h"
#elif CONFIG_SIGNED_TRIANG_ALGO == INT_ABS_MATH_SOLUTION
# include "LFOTriangleIntAbsMath.h"
#elif CONFIG_SIGNED_TRIANG_ALGO == DI_HARMONIC_SOLUTION
# include "LFOTriangleDiHarmonic.h"
#else
# error "Unknown or no (signed) triangle LFO implementation selected!"
#endif

namespace LinuxSampler {

    #if CONFIG_UNSIGNED_TRIANG_ALGO == INT_MATH_SOLUTION
    typedef LFOTriangleIntMath<range_unsigned> LFOUnsigned;
    #elif CONFIG_UNSIGNED_TRIANG_ALGO == INT_ABS_MATH_SOLUTION
    typedef LFOTriangleIntAbsMath<range_unsigned> LFOUnsigned;
    #elif CONFIG_UNSIGNED_TRIANG_ALGO == DI_HARMONIC_SOLUTION
    typedef LFOTriangleDiHarmonic<range_unsigned> LFOUnsigned;
    #endif

    #if CONFIG_SIGNED_TRIANG_ALGO == INT_MATH_SOLUTION
    typedef LFOTriangleIntMath<range_signed> LFOSigned;
    #elif CONFIG_SIGNED_TRIANG_ALGO == INT_ABS_MATH_SOLUTION
    typedef LFOTriangleIntAbsMath<range_signed> LFOSigned;
    #elif CONFIG_SIGNED_TRIANG_ALGO == DI_HARMONIC_SOLUTION
    typedef LFOTriangleDiHarmonic<range_signed> LFOSigned;
    #endif

    class AbstractVoice : public Voice {
        public:
            type_t       Type;         ///< Voice Type (bit field, a voice may have several types)
            NoteBase*    pNote;        ///< Note this voice belongs to and was caused by.
            int          MIDIPan;      ///< the current MIDI pan value plus the value from RegionInfo

            SignalUnitRack* const pSignalUnitRack;

            AbstractVoice(SignalUnitRack* pRack);
            virtual ~AbstractVoice();

            inline bool IsActive() { return PlaybackState; }
            inline bool IsStealable() { return !itKillEvent && PlaybackState >= playback_state_ram; }

            virtual void Reset();

            virtual int Trigger (
                AbstractEngineChannel*  pEngineChannel,
                Pool<Event>::Iterator&  itNoteOnEvent,
                int                     PitchBend,
                type_t                  VoiceType,
                int                     iKeyGroup
            );

            /** Invoked when the voice is freed - gone from active to inactive. */
            virtual void VoiceFreed() { }

            virtual void Synthesize(uint Samples, sample_t* pSrc, uint Skip);
            
            uint GetSampleRate() { return GetEngine()->SampleRate; }
            
            uint8_t GetControllerValue(uint8_t Controller) {
                return (Controller > 128) ? 0 : pEngineChannel->ControllerTable[Controller];
            }

            /// Keyboard key on which this voice should listen to transitional events (i.e. note-off events to release the voice).
            inline uint8_t HostKey() const { return pNote->hostKey; }
            /// Keyboard key which the voice should use for calculating any synthesis relevant parameters (i.e. pitch).
            inline uint8_t MIDIKey() const { return pNote->cause.Param.Note.Key; }
            /// MIDI note-on velocity value which the voice should use for calculating any synthesis relevant parameters (i.e. amplitude).
            inline uint8_t MIDIVelocity() const { return pNote->cause.Param.Note.Velocity; }

            void processCCEvents(RTList<Event>::Iterator& itEvent, uint End);
            void processPitchEvent(RTList<Event>::Iterator& itEvent);
            void processResonanceEvent(RTList<Event>::Iterator& itEvent);
            void processTransitionEvents(RTList<Event>::Iterator& itEvent, uint End);
            void processGroupEvents(RTList<Event>::Iterator& itEvent, uint End);
            void UpdatePortamentoPos(Pool<Event>::Iterator& itNoteOffEvent);
            void Kill(Pool<Event>::Iterator& itKillEvent);
            void CreateEq();
            void onScaleTuningChanged();

            bool                Orphan;             ///< true if this voice is playing a sample from an instrument that is unloaded. When the voice dies, the sample (and dimension region) will be handed back to the instrument resource manager.
            playback_state_t    PlaybackState;      ///< When a sample will be triggered, it will be first played from RAM cache and after a couple of sample points it will switch to disk streaming and at the end of a disk stream we have to add null samples, so the interpolator can do it's work correctly
            Stream::reference_t DiskStreamRef;      ///< Reference / link to the disk stream

            template<class TV, class TRR, class TR, class TD, class TIM, class TI> friend class EngineBase;

        #if CONFIG_DEVMODE
        public:
        #else
        protected:
        #endif
            SampleInfo      SmplInfo;
            RegionInfo      RgnInfo;
            InstrumentInfo  InstrInfo;
            AbstractEngineChannel* pEngineChannel;

            double                      Pos;                ///< Current playback position in sample
            PitchInfo                   Pitch;
            Fade                        NotePitch;          ///< Updated by calls to built-in instrument script function change_tune() (defaults to 1.0, that is neutral).
            float                       CutoffBase;         ///< Cutoff frequency before control change, EG and LFO are applied
            float                       VolumeLeft;         ///< Left channel volume. This factor is calculated when the voice is triggered and doesn't change after that.
            float                       VolumeRight;        ///< Right channel volume. This factor is calculated when the voice is triggered and doesn't change after that.
            Fade                        NotePan[2];         ///< Updated by calls to built-in instrument script function change_pan() (defaults to 1.0, that is neutral, index 0 for left pan, index 1 for right).
            float                       NoteCutoff;         ///< Updated by calls to built-in instrument script function change_cutoff() (defaults to 1.0, that is neutral).
            float                       NoteResonance;      ///< Updated by calls to built-in instrument script function change_reso() (defaults to 1.0, that is neutral).
            gig::SmoothVolume           CrossfadeSmoother;  ///< Crossfade volume, updated by crossfade CC events
            gig::SmoothVolume           VolumeSmoother;     ///< Volume, updated by CC 7 (volume) events
            gig::SmoothVolume           PanLeftSmoother;    ///< Left channel volume, updated by CC 10 (pan) events and change_pan() real-time instrument script calls.
            gig::SmoothVolume           PanRightSmoother;   ///< Right channel volume, updated by CC 10 (pan) events and change_pan() real-time instrument script calls.
            Fade                        NoteVolume;         ///< Note's global volume, updated by change_vol() real-time instrument script calls (defaults to 1.0, that is neutral).
            bool                        DiskVoice;          ///< If the sample is very short it completely fits into the RAM cache and doesn't need to be streamed from disk, in that case this flag is set to false
            bool                        RAMLoop;            ///< If this voice has a loop defined which completely fits into the cached RAM part of the sample, in this case we handle the looping within the voice class, else if the loop is located in the disk stream part, we let the disk stream handle the looping
            unsigned long               MaxRAMPos;          ///< The upper allowed limit (not actually the end) in the RAM sample cache, after that point it's not safe to chase the interpolator another time over over the current cache position, instead we switch to disk then.
            uint                        Delay;              ///< Number of sample points the rendering process of this voice should be delayed (jitter correction), will be set to 0 after the first audio fragment cycle
            EG*                         pEG1;               ///< Envelope Generator 1 (Amplification)
            EG*                         pEG2;               ///< Envelope Generator 2 (Filter cutoff frequency)
            gig::EGDecay                EG3;                ///< Envelope Generator 3 (Pitch) TODO: use common EG instead?
            midi_ctrl                   VCFCutoffCtrl;
            midi_ctrl                   VCFResonanceCtrl;
            LFOUnsigned*                pLFO1;               ///< Low Frequency Oscillator 1 (Amplification)
            LFOUnsigned*                pLFO2;               ///< Low Frequency Oscillator 2 (Filter cutoff frequency)
            LFOSigned*                  pLFO3;               ///< Low Frequency Oscillator 3 (Pitch)
            bool                        bLFO1Enabled;        ///< Should we use the Amplitude LFO for this voice?
            bool                        bLFO2Enabled;        ///< Should we use the Filter Cutoff LFO for this voice?
            bool                        bLFO3Enabled;        ///< Should we use the Pitch LFO for this voice?
            Pool<Event>::Iterator       itTriggerEvent;      ///< First event on the key's list the voice should process (only needed for the first audio fragment in which voice was triggered, after that it will be set to NULL).
            Pool<Event>::Iterator       itKillEvent;         ///< Event which caused this voice to be killed
            int                         SynthesisMode;
            float                       fFinalCutoff;
            float                       fFinalResonance;
            gig::SynthesisParam         finalSynthesisParameters;
            gig::Loop                   loop;
            RTList<Event>*              pGroupEvents;        ///< Events directed to an exclusive group
            
            EqSupport* pEq;         ///< Used for per voice equalization
            bool       bEqSupport;
            
            void PrintEqInfo() {
                if (!bEqSupport || pEq == NULL) {
                    dmsg(1,("EQ support: no\n"));
                } else {
                    pEq->PrintInfo();
                }
            }

            virtual AbstractEngine* GetEngine() = 0;
            virtual SampleInfo      GetSampleInfo() = 0;
            virtual RegionInfo      GetRegionInfo() = 0;
            virtual InstrumentInfo  GetInstrumentInfo() = 0;

            /**
             * Most of the important members of the voice are set when the voice
             * is triggered (like pEngineChannel, pRegion, pSample, etc).
             * This method is called after these members are set and before
             * the voice is actually triggered.
             * Override this method if you need to do some additional
             * initialization which depends on these members before the voice
             * is triggered.
             */
            virtual void AboutToTrigger() { }

            virtual bool EG1Finished(); 

            /**
             * Gets the sample cache size in bytes.
             */
            virtual unsigned long GetSampleCacheSize() = 0;
            
            /**
             * Because in most cases we cache part of the sample in RAM, if the
             * offset is too big (will extend beyond the RAM cache if the cache contains
             * the beginning of the sample) we should cache in the RAM buffer not the
             * beginning of the sample but a part that starts from the sample offset point.
             * In that case the current sample position should start from zero (Pos).
             * When the offset fits into RAM buffer or the whole sample is cached
             * in RAM, Pos should contain the actual offset.
             * We don't trim the sample because it might have a defined
             * loop start point before the start point of the playback.
             */
            virtual void SetSampleStartOffset();

            /**
             * Returns the correct amplitude factor for the given \a MIDIKeyVelocity.
             * All involved parameters (VelocityResponseCurve, VelocityResponseDepth
             * and VelocityResponseCurveScaling) involved are taken into account to
             * calculate the amplitude factor. Use this method when a key was
             * triggered to get the volume with which the sample should be played
             * back.
             *
             * @param MIDIKeyVelocity  MIDI velocity value of the triggered key (between 0 and 127)
             * @returns                amplitude factor (between 0.0 and 1.0)
             */
            virtual double GetVelocityAttenuation(uint8_t MIDIKeyVelocity) = 0;

            virtual double GetSampleAttenuation() = 0;

            virtual double CalculateVolume(double velocityAttenuation);

            virtual float GetReleaseTriggerAttenuation(float noteLength);

            /**
             * Get starting crossfade volume level
             */
            virtual double CalculateCrossfadeVolume(uint8_t MIDIKeyVelocity) = 0;

            virtual MidiKeyBase* GetMidiKeyInfo(int MIDIKey) = 0;

            virtual int   OrderNewStream() = 0;

            virtual PitchInfo CalculatePitchInfo(int PitchBend);

            // TODO: cleanup the interface. The following two methods
            // are maybe not neccessary after the TriggerEG1 method
            // was added.

            /**
             * Get current value of EG1 controller.
             */
            virtual double GetEG1ControllerValue(uint8_t MIDIKeyVelocity) = 0;

            /**
             * Calculate influence of EG1 controller on EG1's parameters.
             */
            virtual EGInfo CalculateEG1ControllerInfluence(double eg1ControllerValue) = 0;

            // TODO: cleanup the interface. The velrelase and
            // velocityAttenuation parameters are perhaps too gig
            // specific.
            /**
             * Trigger the amplitude envelope generator.
             */
            virtual void TriggerEG1(const EGInfo& egInfo, double velrelease, double velocityAttenuation, uint sampleRate, uint8_t velocity) = 0;

            /**
             * Get current value of EG2 controller.
             */
            virtual double GetEG2ControllerValue(uint8_t MIDIKeyVelocity) = 0;

            /**
             * Calculate influence of EG2 controller on EG2's parameters.
             */
            virtual EGInfo CalculateEG2ControllerInfluence(double eg2ControllerValue) = 0;

            virtual void TriggerEG2(const EGInfo& egInfo, double velrelease, double velocityAttenuation, uint sampleRate, uint8_t velocity) = 0;

            virtual float CalculateCutoffBase(uint8_t MIDIKeyVelocity) = 0;
            virtual float CalculateFinalCutoff(float cutoffBase) = 0;

            virtual void InitLFO1() = 0;
            virtual void InitLFO2() = 0;
            virtual void InitLFO3() = 0;

            virtual uint8_t GetVCFCutoffCtrl() = 0;
            virtual uint8_t GetVCFResonanceCtrl() = 0;
            virtual uint8_t CrossfadeAttenuation(uint8_t& CrossfadeControllerValue) = 0;

            virtual void    GetFirstEventOnKey(uint8_t MIDIKey, RTList<Event>::Iterator& itEvent) = 0;
            virtual void    ProcessCCEvent(RTList<Event>::Iterator& itEvent) = 0;
            virtual void    ProcessChannelPressureEvent(RTList<Event>::Iterator& itEvent) = 0;
            virtual void    ProcessPolyphonicKeyPressureEvent(RTList<Event>::Iterator& itEvent) = 0;
            virtual void    ProcessCutoffEvent(RTList<Event>::Iterator& itEvent) = 0;
            virtual double  GetVelocityRelease(uint8_t MIDIKeyVelocity) = 0;

            virtual unsigned long GetNoteOnTime(int MIDIKey) = 0;

            virtual void    ProcessGroupEvent(RTList<Event>::Iterator& itEvent) = 0;
            void            EnterReleaseStage();

            virtual int     CalculatePan(uint8_t pan) = 0;
    };
} // namespace LinuxSampler

#endif  /* __LS_ABSTRACTVOICE_H__ */
1	/***************************************************************************
2	* *
3	* LinuxSampler - modular, streaming capable sampler *
4	* *
5	* Copyright (C) 2003,2004 by Benno Senoner and Christian Schoenebeck *
6	* Copyright (C) 2005-2008 Christian Schoenebeck *
7	* Copyright (C) 2009-2012 Christian Schoenebeck and Grigor Iliev *
8	* *
9	* This program is free software; you can redistribute it and/or modify *
10	* it under the terms of the GNU General Public License as published by *
11	* the Free Software Foundation; either version 2 of the License, or *
12	* (at your option) any later version. *
13	* *
14	* This program is distributed in the hope that it will be useful, *
15	* but WITHOUT ANY WARRANTY; without even the implied warranty of *
16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
17	* GNU General Public License for more details. *
18	* *
19	* You should have received a copy of the GNU General Public License *
20	* along with this program; if not, write to the Free Software *
21	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, *
22	* MA 02111-1307 USA *
23	***************************************************************************/
24
25	#ifndef __LS_ABSTRACTVOICE_H__
26	#define __LS_ABSTRACTVOICE_H__
27
28	#include "Voice.h"
29
30	#include "../../common/global_private.h"
31	#include "../AbstractEngineChannel.h"
32	#include "LFOBase.h"
33	#include "Fade.h"
34	#include "../EngineBase.h"
35	#include "EG.h"
36	#include "../gig/EGADSR.h"
37	#include "../gig/EGDecay.h"
38	#include "../gig/SmoothVolume.h"
39	#include "../gig/Synthesizer.h"
40	#include "../gig/Profiler.h"
41	#include "SignalUnitRack.h"
42
43	// include the appropriate (unsigned) triangle LFO implementation
44	#if CONFIG_UNSIGNED_TRIANG_ALGO == INT_MATH_SOLUTION
45	# include "LFOTriangleIntMath.h"
46	#elif CONFIG_UNSIGNED_TRIANG_ALGO == INT_ABS_MATH_SOLUTION
47	# include "LFOTriangleIntAbsMath.h"
48	#elif CONFIG_UNSIGNED_TRIANG_ALGO == DI_HARMONIC_SOLUTION
49	# include "LFOTriangleDiHarmonic.h"
50	#else
51	# error "Unknown or no (unsigned) triangle LFO implementation selected!"
52	#endif
53
54	// include the appropriate (signed) triangle LFO implementation
55	#if CONFIG_SIGNED_TRIANG_ALGO == INT_MATH_SOLUTION
56	# include "LFOTriangleIntMath.h"
57	#elif CONFIG_SIGNED_TRIANG_ALGO == INT_ABS_MATH_SOLUTION
58	# include "LFOTriangleIntAbsMath.h"
59	#elif CONFIG_SIGNED_TRIANG_ALGO == DI_HARMONIC_SOLUTION
60	# include "LFOTriangleDiHarmonic.h"
61	#else
62	# error "Unknown or no (signed) triangle LFO implementation selected!"
63	#endif
64
65	namespace LinuxSampler {
66
67	#if CONFIG_UNSIGNED_TRIANG_ALGO == INT_MATH_SOLUTION
68	typedef LFOTriangleIntMath<range_unsigned> LFOUnsigned;
69	#elif CONFIG_UNSIGNED_TRIANG_ALGO == INT_ABS_MATH_SOLUTION
70	typedef LFOTriangleIntAbsMath<range_unsigned> LFOUnsigned;
71	#elif CONFIG_UNSIGNED_TRIANG_ALGO == DI_HARMONIC_SOLUTION
72	typedef LFOTriangleDiHarmonic<range_unsigned> LFOUnsigned;
73	#endif
74
75	#if CONFIG_SIGNED_TRIANG_ALGO == INT_MATH_SOLUTION
76	typedef LFOTriangleIntMath<range_signed> LFOSigned;
77	#elif CONFIG_SIGNED_TRIANG_ALGO == INT_ABS_MATH_SOLUTION
78	typedef LFOTriangleIntAbsMath<range_signed> LFOSigned;
79	#elif CONFIG_SIGNED_TRIANG_ALGO == DI_HARMONIC_SOLUTION
80	typedef LFOTriangleDiHarmonic<range_signed> LFOSigned;
81	#endif
82
83	class AbstractVoice : public Voice {
84	public:
85	type_t Type; ///< Voice Type (bit field, a voice may have several types)
86	NoteBase* pNote; ///< Note this voice belongs to and was caused by.
87	int MIDIPan; ///< the current MIDI pan value plus the value from RegionInfo
88
89	SignalUnitRack* const pSignalUnitRack;
90
91	AbstractVoice(SignalUnitRack* pRack);
92	virtual ~AbstractVoice();
93
94	inline bool IsActive() { return PlaybackState; }
95	inline bool IsStealable() { return !itKillEvent && PlaybackState >= playback_state_ram; }
96
97	virtual void Reset();
98
99	virtual int Trigger (
100	AbstractEngineChannel* pEngineChannel,
101	Pool<Event>::Iterator& itNoteOnEvent,
102	int PitchBend,
103	type_t VoiceType,
104	int iKeyGroup
105	);
106
107	/** Invoked when the voice is freed - gone from active to inactive. */
108	virtual void VoiceFreed() { }
109
110	virtual void Synthesize(uint Samples, sample_t* pSrc, uint Skip);
111
112	uint GetSampleRate() { return GetEngine()->SampleRate; }
113
114	uint8_t GetControllerValue(uint8_t Controller) {
115	return (Controller > 128) ? 0 : pEngineChannel->ControllerTable[Controller];
116	}
117
118	/// Keyboard key on which this voice should listen to transitional events (i.e. note-off events to release the voice).
119	inline uint8_t HostKey() const { return pNote->hostKey; }
120	/// Keyboard key which the voice should use for calculating any synthesis relevant parameters (i.e. pitch).
121	inline uint8_t MIDIKey() const { return pNote->cause.Param.Note.Key; }
122	/// MIDI note-on velocity value which the voice should use for calculating any synthesis relevant parameters (i.e. amplitude).
123	inline uint8_t MIDIVelocity() const { return pNote->cause.Param.Note.Velocity; }
124
125	void processCCEvents(RTList<Event>::Iterator& itEvent, uint End);
126	void processPitchEvent(RTList<Event>::Iterator& itEvent);
127	void processResonanceEvent(RTList<Event>::Iterator& itEvent);
128	void processTransitionEvents(RTList<Event>::Iterator& itEvent, uint End);
129	void processGroupEvents(RTList<Event>::Iterator& itEvent, uint End);
130	void UpdatePortamentoPos(Pool<Event>::Iterator& itNoteOffEvent);
131	void Kill(Pool<Event>::Iterator& itKillEvent);
132	void CreateEq();
133	void onScaleTuningChanged();
134
135	bool Orphan; ///< true if this voice is playing a sample from an instrument that is unloaded. When the voice dies, the sample (and dimension region) will be handed back to the instrument resource manager.
136	playback_state_t PlaybackState; ///< When a sample will be triggered, it will be first played from RAM cache and after a couple of sample points it will switch to disk streaming and at the end of a disk stream we have to add null samples, so the interpolator can do it's work correctly
137	Stream::reference_t DiskStreamRef; ///< Reference / link to the disk stream
138
139	template<class TV, class TRR, class TR, class TD, class TIM, class TI> friend class EngineBase;
140
141	#if CONFIG_DEVMODE
142	public:
143	#else
144	protected:
145	#endif
146	SampleInfo SmplInfo;
147	RegionInfo RgnInfo;
148	InstrumentInfo InstrInfo;
149	AbstractEngineChannel* pEngineChannel;
150
151	double Pos; ///< Current playback position in sample
152	PitchInfo Pitch;
153	Fade NotePitch; ///< Updated by calls to built-in instrument script function change_tune() (defaults to 1.0, that is neutral).
154	float CutoffBase; ///< Cutoff frequency before control change, EG and LFO are applied
155	float VolumeLeft; ///< Left channel volume. This factor is calculated when the voice is triggered and doesn't change after that.
156	float VolumeRight; ///< Right channel volume. This factor is calculated when the voice is triggered and doesn't change after that.
157	Fade NotePan[2]; ///< Updated by calls to built-in instrument script function change_pan() (defaults to 1.0, that is neutral, index 0 for left pan, index 1 for right).
158	float NoteCutoff; ///< Updated by calls to built-in instrument script function change_cutoff() (defaults to 1.0, that is neutral).
159	float NoteResonance; ///< Updated by calls to built-in instrument script function change_reso() (defaults to 1.0, that is neutral).
160	gig::SmoothVolume CrossfadeSmoother; ///< Crossfade volume, updated by crossfade CC events
161	gig::SmoothVolume VolumeSmoother; ///< Volume, updated by CC 7 (volume) events
162	gig::SmoothVolume PanLeftSmoother; ///< Left channel volume, updated by CC 10 (pan) events and change_pan() real-time instrument script calls.
163	gig::SmoothVolume PanRightSmoother; ///< Right channel volume, updated by CC 10 (pan) events and change_pan() real-time instrument script calls.
164	Fade NoteVolume; ///< Note's global volume, updated by change_vol() real-time instrument script calls (defaults to 1.0, that is neutral).
165	bool DiskVoice; ///< If the sample is very short it completely fits into the RAM cache and doesn't need to be streamed from disk, in that case this flag is set to false
166	bool RAMLoop; ///< If this voice has a loop defined which completely fits into the cached RAM part of the sample, in this case we handle the looping within the voice class, else if the loop is located in the disk stream part, we let the disk stream handle the looping
167	unsigned long MaxRAMPos; ///< The upper allowed limit (not actually the end) in the RAM sample cache, after that point it's not safe to chase the interpolator another time over over the current cache position, instead we switch to disk then.
168	uint Delay; ///< Number of sample points the rendering process of this voice should be delayed (jitter correction), will be set to 0 after the first audio fragment cycle
169	EG* pEG1; ///< Envelope Generator 1 (Amplification)
170	EG* pEG2; ///< Envelope Generator 2 (Filter cutoff frequency)
171	gig::EGDecay EG3; ///< Envelope Generator 3 (Pitch) TODO: use common EG instead?
172	midi_ctrl VCFCutoffCtrl;
173	midi_ctrl VCFResonanceCtrl;
174	LFOUnsigned* pLFO1; ///< Low Frequency Oscillator 1 (Amplification)
175	LFOUnsigned* pLFO2; ///< Low Frequency Oscillator 2 (Filter cutoff frequency)
176	LFOSigned* pLFO3; ///< Low Frequency Oscillator 3 (Pitch)
177	bool bLFO1Enabled; ///< Should we use the Amplitude LFO for this voice?
178	bool bLFO2Enabled; ///< Should we use the Filter Cutoff LFO for this voice?
179	bool bLFO3Enabled; ///< Should we use the Pitch LFO for this voice?
180	Pool<Event>::Iterator itTriggerEvent; ///< First event on the key's list the voice should process (only needed for the first audio fragment in which voice was triggered, after that it will be set to NULL).
181	Pool<Event>::Iterator itKillEvent; ///< Event which caused this voice to be killed
182	int SynthesisMode;
183	float fFinalCutoff;
184	float fFinalResonance;
185	gig::SynthesisParam finalSynthesisParameters;
186	gig::Loop loop;
187	RTList<Event>* pGroupEvents; ///< Events directed to an exclusive group
188
189	EqSupport* pEq; ///< Used for per voice equalization
190	bool bEqSupport;
191
192	void PrintEqInfo() {
193	if (!bEqSupport \|\| pEq == NULL) {
194	dmsg(1,("EQ support: no\n"));
195	} else {
196	pEq->PrintInfo();
197	}
198	}
199
200	virtual AbstractEngine* GetEngine() = 0;
201	virtual SampleInfo GetSampleInfo() = 0;
202	virtual RegionInfo GetRegionInfo() = 0;
203	virtual InstrumentInfo GetInstrumentInfo() = 0;
204
205	/**
206	* Most of the important members of the voice are set when the voice
207	* is triggered (like pEngineChannel, pRegion, pSample, etc).
208	* This method is called after these members are set and before
209	* the voice is actually triggered.
210	* Override this method if you need to do some additional
211	* initialization which depends on these members before the voice
212	* is triggered.
213	*/
214	virtual void AboutToTrigger() { }
215
216	virtual bool EG1Finished();
217
218	/**
219	* Gets the sample cache size in bytes.
220	*/
221	virtual unsigned long GetSampleCacheSize() = 0;
222
223	/**
224	* Because in most cases we cache part of the sample in RAM, if the
225	* offset is too big (will extend beyond the RAM cache if the cache contains
226	* the beginning of the sample) we should cache in the RAM buffer not the
227	* beginning of the sample but a part that starts from the sample offset point.
228	* In that case the current sample position should start from zero (Pos).
229	* When the offset fits into RAM buffer or the whole sample is cached
230	* in RAM, Pos should contain the actual offset.
231	* We don't trim the sample because it might have a defined
232	* loop start point before the start point of the playback.
233	*/
234	virtual void SetSampleStartOffset();
235
236	/**
237	* Returns the correct amplitude factor for the given \a MIDIKeyVelocity.
238	* All involved parameters (VelocityResponseCurve, VelocityResponseDepth
239	* and VelocityResponseCurveScaling) involved are taken into account to
240	* calculate the amplitude factor. Use this method when a key was
241	* triggered to get the volume with which the sample should be played
242	* back.
243	*
244	* @param MIDIKeyVelocity MIDI velocity value of the triggered key (between 0 and 127)
245	* @returns amplitude factor (between 0.0 and 1.0)
246	*/
247	virtual double GetVelocityAttenuation(uint8_t MIDIKeyVelocity) = 0;
248
249	virtual double GetSampleAttenuation() = 0;
250
251	virtual double CalculateVolume(double velocityAttenuation);
252
253	virtual float GetReleaseTriggerAttenuation(float noteLength);
254
255	/**
256	* Get starting crossfade volume level
257	*/
258	virtual double CalculateCrossfadeVolume(uint8_t MIDIKeyVelocity) = 0;
259
260	virtual MidiKeyBase* GetMidiKeyInfo(int MIDIKey) = 0;
261
262	virtual int OrderNewStream() = 0;
263
264	virtual PitchInfo CalculatePitchInfo(int PitchBend);
265
266	// TODO: cleanup the interface. The following two methods
267	// are maybe not neccessary after the TriggerEG1 method
268	// was added.
269
270	/**
271	* Get current value of EG1 controller.
272	*/
273	virtual double GetEG1ControllerValue(uint8_t MIDIKeyVelocity) = 0;
274
275	/**
276	* Calculate influence of EG1 controller on EG1's parameters.
277	*/
278	virtual EGInfo CalculateEG1ControllerInfluence(double eg1ControllerValue) = 0;
279
280	// TODO: cleanup the interface. The velrelase and
281	// velocityAttenuation parameters are perhaps too gig
282	// specific.
283	/**
284	* Trigger the amplitude envelope generator.
285	*/
286	virtual void TriggerEG1(const EGInfo& egInfo, double velrelease, double velocityAttenuation, uint sampleRate, uint8_t velocity) = 0;
287
288	/**
289	* Get current value of EG2 controller.
290	*/
291	virtual double GetEG2ControllerValue(uint8_t MIDIKeyVelocity) = 0;
292
293	/**
294	* Calculate influence of EG2 controller on EG2's parameters.
295	*/
296	virtual EGInfo CalculateEG2ControllerInfluence(double eg2ControllerValue) = 0;
297
298	virtual void TriggerEG2(const EGInfo& egInfo, double velrelease, double velocityAttenuation, uint sampleRate, uint8_t velocity) = 0;
299
300	virtual float CalculateCutoffBase(uint8_t MIDIKeyVelocity) = 0;
301	virtual float CalculateFinalCutoff(float cutoffBase) = 0;
302
303	virtual void InitLFO1() = 0;
304	virtual void InitLFO2() = 0;
305	virtual void InitLFO3() = 0;
306
307	virtual uint8_t GetVCFCutoffCtrl() = 0;
308	virtual uint8_t GetVCFResonanceCtrl() = 0;
309	virtual uint8_t CrossfadeAttenuation(uint8_t& CrossfadeControllerValue) = 0;
310
311	virtual void GetFirstEventOnKey(uint8_t MIDIKey, RTList<Event>::Iterator& itEvent) = 0;
312	virtual void ProcessCCEvent(RTList<Event>::Iterator& itEvent) = 0;
313	virtual void ProcessChannelPressureEvent(RTList<Event>::Iterator& itEvent) = 0;
314	virtual void ProcessPolyphonicKeyPressureEvent(RTList<Event>::Iterator& itEvent) = 0;
315	virtual void ProcessCutoffEvent(RTList<Event>::Iterator& itEvent) = 0;
316	virtual double GetVelocityRelease(uint8_t MIDIKeyVelocity) = 0;
317
318	virtual unsigned long GetNoteOnTime(int MIDIKey) = 0;
319
320	virtual void ProcessGroupEvent(RTList<Event>::Iterator& itEvent) = 0;
321	void EnterReleaseStage();
322
323	virtual int CalculatePan(uint8_t pan) = 0;
324	};
325	} // namespace LinuxSampler
326
327	#endif /* __LS_ABSTRACTVOICE_H__ */