engines/gig/Voice.h

/***************************************************************************
 *                                                                         *
 *   LinuxSampler - modular, streaming capable sampler                     *
 *                                                                         *
 *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *
 *   Copyright (C) 2005 - 2007 Christian Schoenebeck                       *
 *                                                                         *
 *   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_GIG_VOICE_H__
#define __LS_GIG_VOICE_H__

#include "../../common/global_private.h"

#include <gig.h>

#include "../../common/RTMath.h"
#include "../../common/Pool.h"
#include "../../drivers/audio/AudioOutputDevice.h"
#include "Stream.h"
#include "DiskThread.h"
#include "EGADSR.h"
#include "EGDecay.h"
#include "Filter.h"
#include "../common/LFOBase.h"
#include "../common/VoiceBase.h"
#include "SynthesisParam.h"
#include "SmoothVolume.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 { namespace gig {
    class Engine;
    class EngineChannel;

    /// Reflects a MIDI controller
    struct midi_ctrl {
        uint8_t controller; ///< MIDI control change controller number
        uint8_t value;      ///< Current MIDI controller value
        float   fvalue;     ///< Transformed / effective value (e.g. volume level or filter cutoff frequency)
    };

    #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

    /** Gig Voice
     *
     * Renders a voice for the Gigasampler format.
     */
    class Voice : public LinuxSampler::VoiceBase< ::gig::DimensionRegion> {
        public:
            // Attributes
            type_t       Type;         ///< Voice Type
            int          MIDIKey;      ///< MIDI key number of the key that triggered the voice
            uint         KeyGroup;
            DiskThread*  pDiskThread;  ///< Pointer to the disk thread, to be able to order a disk stream and later to delete the stream again

            // Methods
            Voice();
            virtual ~Voice();
            void Kill(Pool<Event>::Iterator& itKillEvent);
            void Render(uint Samples);
            void Reset();
            void SetOutput(AudioOutputDevice* pAudioOutputDevice);
            void SetEngine(LinuxSampler::Engine* pEngine);
            int  Trigger(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent, int PitchBend, ::gig::DimensionRegion* pDimRgn, type_t VoiceType, int iKeyGroup);
            inline bool IsActive() { return PlaybackState; }
            inline bool IsStealable() { return !itKillEvent && PlaybackState >= playback_state_ram; }
            void UpdatePortamentoPos(Pool<Event>::Iterator& itNoteOffEvent);

            virtual ::gig::DimensionRegion* GetRegion() { return pDimRgn; }

        //private:
            // Attributes
            EngineChannel*              pEngineChannel;
            Engine*                     pEngine;            ///< Pointer to the sampler engine, to be able to access the event lists.
            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.
            SmoothVolume                CrossfadeSmoother;  ///< Crossfade volume, updated by crossfade CC events
            SmoothVolume                VolumeSmoother;     ///< Volume, updated by CC 7 (volume) events
            SmoothVolume                PanLeftSmoother;    ///< Left channel volume, updated by CC 10 (pan) events
            SmoothVolume                PanRightSmoother;   ///< Right channel volume, updated by CC 10 (pan) events
            double                      Pos;                ///< Current playback position in sample
            float                       PitchBase;          ///< Basic pitch depth, stays the same for the whole life time of the voice
            float                       PitchBend;          ///< Current pitch value of the pitchbend wheel
            float                       PitchBendRange;     ///< The pitch range of the pitchbend wheel, value is in cents / 8192
            float                       CutoffBase;         ///< Cutoff frequency before control change, EG and LFO are applied
            ::gig::Sample*              pSample;            ///< Pointer to the sample to be played back
            ::gig::DimensionRegion*     pDimRgn;            ///< Pointer to the articulation information of current dimension region of this voice
            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
            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
            Stream::reference_t         DiskStreamRef;      ///< Reference / link to the disk stream
            int                         RealSampleWordsLeftToRead; ///< Number of samples left to read, not including the silence added for the interpolator
            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.
            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
            //uint                        LoopCyclesLeft;     ///< In case there is a RAMLoop and it's not an endless loop; reflects number of loop cycles left to be passed
            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
            EGADSR                      EG1;                ///< Envelope Generator 1 (Amplification)
            EGADSR                      EG2;                ///< Envelope Generator 2 (Filter cutoff frequency)
            EGDecay                     EG3;                ///< Envelope Generator 3 (Pitch)
            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).
        //public: // FIXME: just made public for debugging (sanity check in Engine::RenderAudio()), should be changed to private before the final release
            Pool<Event>::Iterator       itKillEvent;         ///< Event which caused this voice to be killed
        //private:
            int                         SynthesisMode;
            float                       fFinalCutoff;
            float                       fFinalResonance;
            SynthesisParam              finalSynthesisParameters;
            Loop                        loop;

            // Static Methods
            static float CalculateFilterCutoffCoeff();

            // Methods
            Stream::Handle KillImmediately(bool bRequestNotification = false);
            void ProcessEvents(uint Samples);
            void Synthesize(uint Samples, sample_t* pSrc, uint Skip);
            void processTransitionEvents(RTList<Event>::Iterator& itEvent, uint End);
            void processCCEvents(RTList<Event>::Iterator& itEvent, uint End);
            void processPitchEvent(RTList<Event>::Iterator& itEvent);
            void processCrossFadeEvent(RTList<Event>::Iterator& itEvent);
            void processCutoffEvent(RTList<Event>::Iterator& itEvent);
            void processResonanceEvent(RTList<Event>::Iterator& itEvent);

            inline uint8_t CrossfadeAttenuation(uint8_t& CrossfadeControllerValue) {
                uint8_t c = std::max(CrossfadeControllerValue, pDimRgn->AttenuationControllerThreshold);
                c = (!pDimRgn->Crossfade.out_end) ? c /* 0,0,0,0 means no crossfade defined */
                          : (c < pDimRgn->Crossfade.in_end) ?
                                ((c <= pDimRgn->Crossfade.in_start) ? 0
                                : 127 * (c - pDimRgn->Crossfade.in_start) / (pDimRgn->Crossfade.in_end - pDimRgn->Crossfade.in_start))
                          : (c <= pDimRgn->Crossfade.out_start) ? 127
                          : (c < pDimRgn->Crossfade.out_end) ? 127 * (pDimRgn->Crossfade.out_end - c) / (pDimRgn->Crossfade.out_end - pDimRgn->Crossfade.out_start)
                          : 0;
                return pDimRgn->InvertAttenuationController ? 127 - c : c;
            }

            inline float Constrain(float ValueToCheck, float Min, float Max) {
                if      (ValueToCheck > Max) ValueToCheck = Max;
                else if (ValueToCheck < Min) ValueToCheck = Min;
                return ValueToCheck;
            }
    };

}} // namespace LinuxSampler::gig

#endif // __LS_GIG_VOICE_H__
1	schoenebeck	53	/***************************************************************************
2			* *
3			* LinuxSampler - modular, streaming capable sampler *
4			* *
5	schoenebeck	56	* Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck *
6	schoenebeck	1321	* Copyright (C) 2005 - 2007 Christian Schoenebeck *
7	schoenebeck	53	* *
8			* This program is free software; you can redistribute it and/or modify *
9			* it under the terms of the GNU General Public License as published by *
10			* the Free Software Foundation; either version 2 of the License, or *
11			* (at your option) any later version. *
12			* *
13			* This program is distributed in the hope that it will be useful, *
14			* but WITHOUT ANY WARRANTY; without even the implied warranty of *
15			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
16			* GNU General Public License for more details. *
17			* *
18			* You should have received a copy of the GNU General Public License *
19			* along with this program; if not, write to the Free Software *
20			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, *
21			* MA 02111-1307 USA *
22			***************************************************************************/
23
24			#ifndef __LS_GIG_VOICE_H__
25			#define __LS_GIG_VOICE_H__
26
27	schoenebeck	1424	#include "../../common/global_private.h"
28	schoenebeck	53
29	schoenebeck	505	#include <gig.h>
30
31	schoenebeck	53	#include "../../common/RTMath.h"
32	schoenebeck	273	#include "../../common/Pool.h"
33	schoenebeck	203	#include "../../drivers/audio/AudioOutputDevice.h"
34	schoenebeck	53	#include "Stream.h"
35			#include "DiskThread.h"
36	schoenebeck	738	#include "EGADSR.h"
37	schoenebeck	53	#include "EGDecay.h"
38			#include "Filter.h"
39	schoenebeck	738	#include "../common/LFOBase.h"
40	iliev	2012	#include "../common/VoiceBase.h"
41	schoenebeck	770	#include "SynthesisParam.h"
42	persson	832	#include "SmoothVolume.h"
43	schoenebeck	53
44	schoenebeck	738	// include the appropriate (unsigned) triangle LFO implementation
45			#if CONFIG_UNSIGNED_TRIANG_ALGO == INT_MATH_SOLUTION
46			# include "../common/LFOTriangleIntMath.h"
47			#elif CONFIG_UNSIGNED_TRIANG_ALGO == INT_ABS_MATH_SOLUTION
48			# include "../common/LFOTriangleIntAbsMath.h"
49			#elif CONFIG_UNSIGNED_TRIANG_ALGO == DI_HARMONIC_SOLUTION
50			# include "../common/LFOTriangleDiHarmonic.h"
51			#else
52			# error "Unknown or no (unsigned) triangle LFO implementation selected!"
53			#endif
54
55			// include the appropriate (signed) triangle LFO implementation
56			#if CONFIG_SIGNED_TRIANG_ALGO == INT_MATH_SOLUTION
57			# include "../common/LFOTriangleIntMath.h"
58			#elif CONFIG_SIGNED_TRIANG_ALGO == INT_ABS_MATH_SOLUTION
59			# include "../common/LFOTriangleIntAbsMath.h"
60			#elif CONFIG_SIGNED_TRIANG_ALGO == DI_HARMONIC_SOLUTION
61			# include "../common/LFOTriangleDiHarmonic.h"
62			#else
63			# error "Unknown or no (signed) triangle LFO implementation selected!"
64			#endif
65
66	schoenebeck	53	namespace LinuxSampler { namespace gig {
67			class Engine;
68	iliev	2012	class EngineChannel;
69	schoenebeck	53
70			/// Reflects a MIDI controller
71			struct midi_ctrl {
72			uint8_t controller; ///< MIDI control change controller number
73			uint8_t value; ///< Current MIDI controller value
74			float fvalue; ///< Transformed / effective value (e.g. volume level or filter cutoff frequency)
75			};
76
77	schoenebeck	738	#if CONFIG_UNSIGNED_TRIANG_ALGO == INT_MATH_SOLUTION
78			typedef LFOTriangleIntMath<range_unsigned> LFOUnsigned;
79			#elif CONFIG_UNSIGNED_TRIANG_ALGO == INT_ABS_MATH_SOLUTION
80			typedef LFOTriangleIntAbsMath<range_unsigned> LFOUnsigned;
81			#elif CONFIG_UNSIGNED_TRIANG_ALGO == DI_HARMONIC_SOLUTION
82			typedef LFOTriangleDiHarmonic<range_unsigned> LFOUnsigned;
83			#endif
84
85			#if CONFIG_SIGNED_TRIANG_ALGO == INT_MATH_SOLUTION
86			typedef LFOTriangleIntMath<range_signed> LFOSigned;
87			#elif CONFIG_SIGNED_TRIANG_ALGO == INT_ABS_MATH_SOLUTION
88			typedef LFOTriangleIntAbsMath<range_signed> LFOSigned;
89			#elif CONFIG_SIGNED_TRIANG_ALGO == DI_HARMONIC_SOLUTION
90			typedef LFOTriangleDiHarmonic<range_signed> LFOSigned;
91			#endif
92
93	schoenebeck	53	/** Gig Voice
94			*
95			* Renders a voice for the Gigasampler format.
96			*/
97	iliev	2012	class Voice : public LinuxSampler::VoiceBase< ::gig::DimensionRegion> {
98	schoenebeck	53	public:
99			// Attributes
100	schoenebeck	242	type_t Type; ///< Voice Type
101	schoenebeck	53	int MIDIKey; ///< MIDI key number of the key that triggered the voice
102	schoenebeck	239	uint KeyGroup;
103	schoenebeck	53	DiskThread* pDiskThread; ///< Pointer to the disk thread, to be able to order a disk stream and later to delete the stream again
104
105			// Methods
106			Voice();
107	letz	502	virtual ~Voice();
108	schoenebeck	271	void Kill(Pool<Event>::Iterator& itKillEvent);
109	schoenebeck	53	void Render(uint Samples);
110			void Reset();
111			void SetOutput(AudioOutputDevice* pAudioOutputDevice);
112	iliev	2012	void SetEngine(LinuxSampler::Engine* pEngine);
113	schoenebeck	669	int Trigger(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent, int PitchBend, ::gig::DimensionRegion* pDimRgn, type_t VoiceType, int iKeyGroup);
114	schoenebeck	285	inline bool IsActive() { return PlaybackState; }
115	schoenebeck	663	inline bool IsStealable() { return !itKillEvent && PlaybackState >= playback_state_ram; }
116	schoenebeck	829	void UpdatePortamentoPos(Pool<Event>::Iterator& itNoteOffEvent);
117
118	iliev	2012	virtual ::gig::DimensionRegion* GetRegion() { return pDimRgn; }
119
120	schoenebeck	319	//private:
121	schoenebeck	53	// Attributes
122	schoenebeck	411	EngineChannel* pEngineChannel;
123			Engine* pEngine; ///< Pointer to the sampler engine, to be able to access the event lists.
124	persson	832	float VolumeLeft; ///< Left channel volume. This factor is calculated when the voice is triggered and doesn't change after that.
125			float VolumeRight; ///< Right channel volume. This factor is calculated when the voice is triggered and doesn't change after that.
126			SmoothVolume CrossfadeSmoother; ///< Crossfade volume, updated by crossfade CC events
127			SmoothVolume VolumeSmoother; ///< Volume, updated by CC 7 (volume) events
128			SmoothVolume PanLeftSmoother; ///< Left channel volume, updated by CC 10 (pan) events
129			SmoothVolume PanRightSmoother; ///< Right channel volume, updated by CC 10 (pan) events
130	persson	783	double Pos; ///< Current playback position in sample
131	schoenebeck	319	float PitchBase; ///< Basic pitch depth, stays the same for the whole life time of the voice
132			float PitchBend; ///< Current pitch value of the pitchbend wheel
133	persson	1923	float PitchBendRange; ///< The pitch range of the pitchbend wheel, value is in cents / 8192
134	persson	729	float CutoffBase; ///< Cutoff frequency before control change, EG and LFO are applied
135	schoenebeck	53	::gig::Sample* pSample; ///< Pointer to the sample to be played back
136	schoenebeck	236	::gig::DimensionRegion* pDimRgn; ///< Pointer to the articulation information of current dimension region of this voice
137	persson	1038	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.
138	schoenebeck	53	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
139			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
140			Stream::reference_t DiskStreamRef; ///< Reference / link to the disk stream
141	schoenebeck	330	int RealSampleWordsLeftToRead; ///< Number of samples left to read, not including the silence added for the interpolator
142	schoenebeck	53	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.
143			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
144	schoenebeck	770	//uint LoopCyclesLeft; ///< In case there is a RAMLoop and it's not an endless loop; reflects number of loop cycles left to be passed
145	schoenebeck	53	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
146	schoenebeck	738	EGADSR EG1; ///< Envelope Generator 1 (Amplification)
147			EGADSR EG2; ///< Envelope Generator 2 (Filter cutoff frequency)
148			EGDecay EG3; ///< Envelope Generator 3 (Pitch)
149	schoenebeck	53	midi_ctrl VCFCutoffCtrl;
150			midi_ctrl VCFResonanceCtrl;
151	schoenebeck	738	LFOUnsigned* pLFO1; ///< Low Frequency Oscillator 1 (Amplification)
152			LFOUnsigned* pLFO2; ///< Low Frequency Oscillator 2 (Filter cutoff frequency)
153			LFOSigned* pLFO3; ///< Low Frequency Oscillator 3 (Pitch)
154	schoenebeck	687	bool bLFO1Enabled; ///< Should we use the Amplitude LFO for this voice?
155			bool bLFO2Enabled; ///< Should we use the Filter Cutoff LFO for this voice?
156			bool bLFO3Enabled; ///< Should we use the Pitch LFO for this voice?
157	schoenebeck	271	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).
158	schoenebeck	319	//public: // FIXME: just made public for debugging (sanity check in Engine::RenderAudio()), should be changed to private before the final release
159	schoenebeck	271	Pool<Event>::Iterator itKillEvent; ///< Event which caused this voice to be killed
160	schoenebeck	319	//private:
161			int SynthesisMode;
162	schoenebeck	738	float fFinalCutoff;
163			float fFinalResonance;
164	schoenebeck	770	SynthesisParam finalSynthesisParameters;
165			Loop loop;
166	schoenebeck	738
167	schoenebeck	53	// Static Methods
168			static float CalculateFilterCutoffCoeff();
169
170			// Methods
171	schoenebeck	1321	Stream::Handle KillImmediately(bool bRequestNotification = false);
172	schoenebeck	319	void ProcessEvents(uint Samples);
173	senkov	325	void Synthesize(uint Samples, sample_t* pSrc, uint Skip);
174	schoenebeck	738	void processTransitionEvents(RTList<Event>::Iterator& itEvent, uint End);
175			void processCCEvents(RTList<Event>::Iterator& itEvent, uint End);
176			void processPitchEvent(RTList<Event>::Iterator& itEvent);
177			void processCrossFadeEvent(RTList<Event>::Iterator& itEvent);
178			void processCutoffEvent(RTList<Event>::Iterator& itEvent);
179			void processResonanceEvent(RTList<Event>::Iterator& itEvent);
180	schoenebeck	245
181	persson	832	inline uint8_t CrossfadeAttenuation(uint8_t& CrossfadeControllerValue) {
182	persson	831	uint8_t c = std::max(CrossfadeControllerValue, pDimRgn->AttenuationControllerThreshold);
183	persson	832	c = (!pDimRgn->Crossfade.out_end) ? c /* 0,0,0,0 means no crossfade defined */
184	persson	831	: (c < pDimRgn->Crossfade.in_end) ?
185	persson	832	((c <= pDimRgn->Crossfade.in_start) ? 0
186			: 127 * (c - pDimRgn->Crossfade.in_start) / (pDimRgn->Crossfade.in_end - pDimRgn->Crossfade.in_start))
187			: (c <= pDimRgn->Crossfade.out_start) ? 127
188			: (c < pDimRgn->Crossfade.out_end) ? 127 * (pDimRgn->Crossfade.out_end - c) / (pDimRgn->Crossfade.out_end - pDimRgn->Crossfade.out_start)
189			: 0;
190			return pDimRgn->InvertAttenuationController ? 127 - c : c;
191	schoenebeck	236	}
192
193	schoenebeck	53	inline float Constrain(float ValueToCheck, float Min, float Max) {
194			if (ValueToCheck > Max) ValueToCheck = Max;
195			else if (ValueToCheck < Min) ValueToCheck = Min;
196			return ValueToCheck;
197			}
198			};
199
200			}} // namespace LinuxSampler::gig
201
202			#endif // __LS_GIG_VOICE_H__