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 "../common/LFOBase.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 "../common/LFOTriangleIntMath.h"
#elif CONFIG_UNSIGNED_TRIANG_ALGO == INT_ABS_MATH_SOLUTION
# include "../common/LFOTriangleIntAbsMath.h"
#elif CONFIG_UNSIGNED_TRIANG_ALGO == DI_HARMONIC_SOLUTION
# include "../common/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 "../common/LFOTriangleIntMath.h"
#elif CONFIG_SIGNED_TRIANG_ALGO == INT_ABS_MATH_SOLUTION
# include "../common/LFOTriangleIntAbsMath.h"
#elif CONFIG_SIGNED_TRIANG_ALGO == DI_HARMONIC_SOLUTION
# include "../common/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;

        protected:
            SampleInfo      SmplInfo;
            RegionInfo      RgnInfo;
            InstrumentInfo  InstrInfo;
            AbstractEngineChannel* pEngineChannel;

            double                      Pos;                ///< Current playback position in sample
            PitchInfo                   Pitch;
            float                       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.
            float                       NotePanLeft;        ///< Updated by calls to built-in instrument script function change_pan() (defaults to 1.0, that is neutral).
            float                       NotePanRight;       ///< Updated by calls to built-in instrument script function change_pan() (defaults to 1.0, that is neutral).
            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.
            gig::SmoothVolume           NoteVolumeSmoother; ///< Note's global volume, updated by change_vol() real-time instrument script calls.
            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	iliev	2015	/***************************************************************************
2			* *
3			* LinuxSampler - modular, streaming capable sampler *
4			* *
5			* Copyright (C) 2003,2004 by Benno Senoner and Christian Schoenebeck *
6	persson	2055	* Copyright (C) 2005-2008 Christian Schoenebeck *
7	persson	2382	* Copyright (C) 2009-2012 Christian Schoenebeck and Grigor Iliev *
8	iliev	2015	* *
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	persson	2114	#define __LS_ABSTRACTVOICE_H__
27	iliev	2015
28			#include "Voice.h"
29
30			#include "../../common/global_private.h"
31			#include "../AbstractEngineChannel.h"
32			#include "../common/LFOBase.h"
33			#include "../EngineBase.h"
34	persson	2055	#include "EG.h"
35	iliev	2015	#include "../gig/EGADSR.h"
36			#include "../gig/EGDecay.h"
37			#include "../gig/SmoothVolume.h"
38			#include "../gig/Synthesizer.h"
39			#include "../gig/Profiler.h"
40	iliev	2205	#include "SignalUnitRack.h"
41	iliev	2015
42			// include the appropriate (unsigned) triangle LFO implementation
43			#if CONFIG_UNSIGNED_TRIANG_ALGO == INT_MATH_SOLUTION
44			# include "../common/LFOTriangleIntMath.h"
45			#elif CONFIG_UNSIGNED_TRIANG_ALGO == INT_ABS_MATH_SOLUTION
46			# include "../common/LFOTriangleIntAbsMath.h"
47			#elif CONFIG_UNSIGNED_TRIANG_ALGO == DI_HARMONIC_SOLUTION
48			# include "../common/LFOTriangleDiHarmonic.h"
49			#else
50			# error "Unknown or no (unsigned) triangle LFO implementation selected!"
51			#endif
52
53			// include the appropriate (signed) triangle LFO implementation
54			#if CONFIG_SIGNED_TRIANG_ALGO == INT_MATH_SOLUTION
55			# include "../common/LFOTriangleIntMath.h"
56			#elif CONFIG_SIGNED_TRIANG_ALGO == INT_ABS_MATH_SOLUTION
57			# include "../common/LFOTriangleIntAbsMath.h"
58			#elif CONFIG_SIGNED_TRIANG_ALGO == DI_HARMONIC_SOLUTION
59			# include "../common/LFOTriangleDiHarmonic.h"
60			#else
61			# error "Unknown or no (signed) triangle LFO implementation selected!"
62			#endif
63
64			namespace LinuxSampler {
65
66			#if CONFIG_UNSIGNED_TRIANG_ALGO == INT_MATH_SOLUTION
67			typedef LFOTriangleIntMath<range_unsigned> LFOUnsigned;
68			#elif CONFIG_UNSIGNED_TRIANG_ALGO == INT_ABS_MATH_SOLUTION
69			typedef LFOTriangleIntAbsMath<range_unsigned> LFOUnsigned;
70			#elif CONFIG_UNSIGNED_TRIANG_ALGO == DI_HARMONIC_SOLUTION
71			typedef LFOTriangleDiHarmonic<range_unsigned> LFOUnsigned;
72			#endif
73
74			#if CONFIG_SIGNED_TRIANG_ALGO == INT_MATH_SOLUTION
75			typedef LFOTriangleIntMath<range_signed> LFOSigned;
76			#elif CONFIG_SIGNED_TRIANG_ALGO == INT_ABS_MATH_SOLUTION
77			typedef LFOTriangleIntAbsMath<range_signed> LFOSigned;
78			#elif CONFIG_SIGNED_TRIANG_ALGO == DI_HARMONIC_SOLUTION
79			typedef LFOTriangleDiHarmonic<range_signed> LFOSigned;
80			#endif
81
82			class AbstractVoice : public Voice {
83			public:
84	persson	2115	type_t Type; ///< Voice Type (bit field, a voice may have several types)
85	schoenebeck	2879	NoteBase* pNote; ///< Note this voice belongs to and was caused by.
86	persson	2382	int MIDIPan; ///< the current MIDI pan value plus the value from RegionInfo
87	schoenebeck	2879
88	iliev	2217	SignalUnitRack* const pSignalUnitRack;
89	iliev	2015
90	iliev	2217	AbstractVoice(SignalUnitRack* pRack);
91	iliev	2015	virtual ~AbstractVoice();
92
93			inline bool IsActive() { return PlaybackState; }
94			inline bool IsStealable() { return !itKillEvent && PlaybackState >= playback_state_ram; }
95
96			virtual void Reset();
97
98			virtual int Trigger (
99			AbstractEngineChannel* pEngineChannel,
100			Pool<Event>::Iterator& itNoteOnEvent,
101			int PitchBend,
102			type_t VoiceType,
103			int iKeyGroup
104			);
105
106	iliev	2244	/** Invoked when the voice is freed - gone from active to inactive. */
107			virtual void VoiceFreed() { }
108
109	iliev	2015	virtual void Synthesize(uint Samples, sample_t* pSrc, uint Skip);
110	iliev	2205
111			uint GetSampleRate() { return GetEngine()->SampleRate; }
112	iliev	2224
113			uint8_t GetControllerValue(uint8_t Controller) {
114			return (Controller > 128) ? 0 : pEngineChannel->ControllerTable[Controller];
115			}
116	iliev	2015
117	schoenebeck	2879	/// Keyboard key on which this voice should listen to transitional events (i.e. note-off events to release the voice).
118			inline uint8_t HostKey() const { return pNote->hostKey; }
119			/// Keyboard key which the voice should use for calculating any synthesis relevant parameters (i.e. pitch).
120			inline uint8_t MIDIKey() const { return pNote->cause.Param.Note.Key; }
121			/// MIDI note-on velocity value which the voice should use for calculating any synthesis relevant parameters (i.e. amplitude).
122			inline uint8_t MIDIVelocity() const { return pNote->cause.Param.Note.Velocity; }
123
124	iliev	2015	void processCCEvents(RTList<Event>::Iterator& itEvent, uint End);
125			void processPitchEvent(RTList<Event>::Iterator& itEvent);
126			void processResonanceEvent(RTList<Event>::Iterator& itEvent);
127			void processTransitionEvents(RTList<Event>::Iterator& itEvent, uint End);
128	persson	2114	void processGroupEvents(RTList<Event>::Iterator& itEvent, uint End);
129	iliev	2015	void UpdatePortamentoPos(Pool<Event>::Iterator& itNoteOffEvent);
130			void Kill(Pool<Event>::Iterator& itKillEvent);
131	iliev	2298	void CreateEq();
132	schoenebeck	2448	void onScaleTuningChanged();
133	iliev	2015
134			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.
135			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
136			Stream::reference_t DiskStreamRef; ///< Reference / link to the disk stream
137
138			template<class TV, class TRR, class TR, class TD, class TIM, class TI> friend class EngineBase;
139
140			protected:
141			SampleInfo SmplInfo;
142			RegionInfo RgnInfo;
143			InstrumentInfo InstrInfo;
144			AbstractEngineChannel* pEngineChannel;
145
146			double Pos; ///< Current playback position in sample
147			PitchInfo Pitch;
148	schoenebeck	2931	float NotePitch; ///< Updated by calls to built-in instrument script function change_tune() (defaults to 1.0, that is neutral).
149	iliev	2015	float CutoffBase; ///< Cutoff frequency before control change, EG and LFO are applied
150			float VolumeLeft; ///< Left channel volume. This factor is calculated when the voice is triggered and doesn't change after that.
151			float VolumeRight; ///< Right channel volume. This factor is calculated when the voice is triggered and doesn't change after that.
152	schoenebeck	2931	float NotePanLeft; ///< Updated by calls to built-in instrument script function change_pan() (defaults to 1.0, that is neutral).
153			float NotePanRight; ///< Updated by calls to built-in instrument script function change_pan() (defaults to 1.0, that is neutral).
154	schoenebeck	2935	float NoteCutoff; ///< Updated by calls to built-in instrument script function change_cutoff() (defaults to 1.0, that is neutral).
155			float NoteResonance; ///< Updated by calls to built-in instrument script function change_reso() (defaults to 1.0, that is neutral).
156	iliev	2015	gig::SmoothVolume CrossfadeSmoother; ///< Crossfade volume, updated by crossfade CC events
157			gig::SmoothVolume VolumeSmoother; ///< Volume, updated by CC 7 (volume) events
158	schoenebeck	2931	gig::SmoothVolume PanLeftSmoother; ///< Left channel volume, updated by CC 10 (pan) events and change_pan() real-time instrument script calls.
159			gig::SmoothVolume PanRightSmoother; ///< Right channel volume, updated by CC 10 (pan) events and change_pan() real-time instrument script calls.
160			gig::SmoothVolume NoteVolumeSmoother; ///< Note's global volume, updated by change_vol() real-time instrument script calls.
161	iliev	2015	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
162			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
163			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.
164			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
165	persson	2055	EG* pEG1; ///< Envelope Generator 1 (Amplification)
166	persson	2175	EG* pEG2; ///< Envelope Generator 2 (Filter cutoff frequency)
167	persson	2055	gig::EGDecay EG3; ///< Envelope Generator 3 (Pitch) TODO: use common EG instead?
168	iliev	2015	midi_ctrl VCFCutoffCtrl;
169			midi_ctrl VCFResonanceCtrl;
170			LFOUnsigned* pLFO1; ///< Low Frequency Oscillator 1 (Amplification)
171			LFOUnsigned* pLFO2; ///< Low Frequency Oscillator 2 (Filter cutoff frequency)
172			LFOSigned* pLFO3; ///< Low Frequency Oscillator 3 (Pitch)
173			bool bLFO1Enabled; ///< Should we use the Amplitude LFO for this voice?
174			bool bLFO2Enabled; ///< Should we use the Filter Cutoff LFO for this voice?
175			bool bLFO3Enabled; ///< Should we use the Pitch LFO for this voice?
176			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).
177			Pool<Event>::Iterator itKillEvent; ///< Event which caused this voice to be killed
178			int SynthesisMode;
179			float fFinalCutoff;
180			float fFinalResonance;
181			gig::SynthesisParam finalSynthesisParameters;
182			gig::Loop loop;
183	persson	2114	RTList<Event>* pGroupEvents; ///< Events directed to an exclusive group
184	iliev	2298
185			EqSupport* pEq; ///< Used for per voice equalization
186			bool bEqSupport;
187
188			void PrintEqInfo() {
189			if (!bEqSupport \|\| pEq == NULL) {
190			dmsg(1,("EQ support: no\n"));
191			} else {
192			pEq->PrintInfo();
193			}
194			}
195	iliev	2015
196			virtual AbstractEngine* GetEngine() = 0;
197			virtual SampleInfo GetSampleInfo() = 0;
198			virtual RegionInfo GetRegionInfo() = 0;
199			virtual InstrumentInfo GetInstrumentInfo() = 0;
200
201			/**
202	iliev	2205	* Most of the important members of the voice are set when the voice
203			* is triggered (like pEngineChannel, pRegion, pSample, etc).
204			* This method is called after these members are set and before
205			* the voice is actually triggered.
206			* Override this method if you need to do some additional
207			* initialization which depends on these members before the voice
208			* is triggered.
209			*/
210			virtual void AboutToTrigger() { }
211
212			virtual bool EG1Finished();
213
214			/**
215	iliev	2015	* Gets the sample cache size in bytes.
216			*/
217			virtual unsigned long GetSampleCacheSize() = 0;
218	iliev	2216
219			/**
220			* Because in most cases we cache part of the sample in RAM, if the
221			* offset is too big (will extend beyond the RAM cache if the cache contains
222			* the beginning of the sample) we should cache in the RAM buffer not the
223			* beginning of the sample but a part that starts from the sample offset point.
224			* In that case the current sample position should start from zero (Pos).
225			* When the offset fits into RAM buffer or the whole sample is cached
226			* in RAM, Pos should contain the actual offset.
227			* We don't trim the sample because it might have a defined
228			* loop start point before the start point of the playback.
229			*/
230			virtual void SetSampleStartOffset();
231	iliev	2015
232			/**
233			* Returns the correct amplitude factor for the given \a MIDIKeyVelocity.
234			* All involved parameters (VelocityResponseCurve, VelocityResponseDepth
235			* and VelocityResponseCurveScaling) involved are taken into account to
236			* calculate the amplitude factor. Use this method when a key was
237			* triggered to get the volume with which the sample should be played
238			* back.
239			*
240			* @param MIDIKeyVelocity MIDI velocity value of the triggered key (between 0 and 127)
241			* @returns amplitude factor (between 0.0 and 1.0)
242			*/
243			virtual double GetVelocityAttenuation(uint8_t MIDIKeyVelocity) = 0;
244
245			virtual double GetSampleAttenuation() = 0;
246
247			virtual double CalculateVolume(double velocityAttenuation);
248
249	persson	2061	virtual float GetReleaseTriggerAttenuation(float noteLength);
250
251	iliev	2015	/**
252			* Get starting crossfade volume level
253			*/
254			virtual double CalculateCrossfadeVolume(uint8_t MIDIKeyVelocity) = 0;
255
256	schoenebeck	2121	virtual MidiKeyBase* GetMidiKeyInfo(int MIDIKey) = 0;
257
258	iliev	2015	virtual int OrderNewStream() = 0;
259
260			virtual PitchInfo CalculatePitchInfo(int PitchBend);
261
262	persson	2055	// TODO: cleanup the interface. The following two methods
263			// are maybe not neccessary after the TriggerEG1 method
264			// was added.
265
266	iliev	2015	/**
267			* Get current value of EG1 controller.
268			*/
269			virtual double GetEG1ControllerValue(uint8_t MIDIKeyVelocity) = 0;
270
271			/**
272			* Calculate influence of EG1 controller on EG1's parameters.
273			*/
274			virtual EGInfo CalculateEG1ControllerInfluence(double eg1ControllerValue) = 0;
275
276	persson	2055	// TODO: cleanup the interface. The velrelase and
277			// velocityAttenuation parameters are perhaps too gig
278			// specific.
279	iliev	2015	/**
280	persson	2055	* Trigger the amplitude envelope generator.
281			*/
282			virtual void TriggerEG1(const EGInfo& egInfo, double velrelease, double velocityAttenuation, uint sampleRate, uint8_t velocity) = 0;
283
284			/**
285	iliev	2015	* Get current value of EG2 controller.
286			*/
287			virtual double GetEG2ControllerValue(uint8_t MIDIKeyVelocity) = 0;
288
289			/**
290			* Calculate influence of EG2 controller on EG2's parameters.
291			*/
292			virtual EGInfo CalculateEG2ControllerInfluence(double eg2ControllerValue) = 0;
293
294	persson	2175	virtual void TriggerEG2(const EGInfo& egInfo, double velrelease, double velocityAttenuation, uint sampleRate, uint8_t velocity) = 0;
295
296	iliev	2015	virtual float CalculateCutoffBase(uint8_t MIDIKeyVelocity) = 0;
297			virtual float CalculateFinalCutoff(float cutoffBase) = 0;
298
299			virtual void InitLFO1() = 0;
300			virtual void InitLFO2() = 0;
301			virtual void InitLFO3() = 0;
302
303			virtual uint8_t GetVCFCutoffCtrl() = 0;
304			virtual uint8_t GetVCFResonanceCtrl() = 0;
305			virtual uint8_t CrossfadeAttenuation(uint8_t& CrossfadeControllerValue) = 0;
306
307			virtual void GetFirstEventOnKey(uint8_t MIDIKey, RTList<Event>::Iterator& itEvent) = 0;
308			virtual void ProcessCCEvent(RTList<Event>::Iterator& itEvent) = 0;
309	schoenebeck	2559	virtual void ProcessChannelPressureEvent(RTList<Event>::Iterator& itEvent) = 0;
310			virtual void ProcessPolyphonicKeyPressureEvent(RTList<Event>::Iterator& itEvent) = 0;
311	iliev	2015	virtual void ProcessCutoffEvent(RTList<Event>::Iterator& itEvent) = 0;
312			virtual double GetVelocityRelease(uint8_t MIDIKeyVelocity) = 0;
313
314			virtual unsigned long GetNoteOnTime(int MIDIKey) = 0;
315	persson	2114
316			virtual void ProcessGroupEvent(RTList<Event>::Iterator& itEvent) = 0;
317			void EnterReleaseStage();
318	persson	2382
319			virtual int CalculatePan(uint8_t pan) = 0;
320	iliev	2015	};
321			} // namespace LinuxSampler
322
323	persson	2114	#endif /* __LS_ABSTRACTVOICE_H__ */