engines/gig/Voice.h

/***************************************************************************
 *                                                                         *
 *   LinuxSampler - modular, streaming capable sampler                     *
 *                                                                         *
 *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *
 *   Copyright (C) 2005, 2006 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.h"

#include <gig.h>

#include "../../common/RTMath.h"
#include "../../common/RingBuffer.h"
#include "../../common/Pool.h"
#include "../../drivers/audio/AudioOutputDevice.h"
#include "../common/BiquadFilter.h"
#include "Engine.h"
#include "EngineChannel.h"
#include "Stream.h"
#include "DiskThread.h"
#include "EGADSR.h"
#include "EGDecay.h"
#include "Filter.h"
#include "../common/LFOBase.h"
#include "SynthesisParam.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;

    /// 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:
            // Types
            enum type_t {
                type_normal,
                type_release_trigger_required,  ///< If the key of this voice will be released, it causes a release triggered voice to be spawned
                type_release_trigger            ///< Release triggered voice which cannot be killed by releasing its key
            };
            
            // 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(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);

        //private:
            // Types
            enum playback_state_t {
                playback_state_end  = 0,
                playback_state_init = 1,
                playback_state_ram  = 2,
                playback_state_disk = 3
            };

            // Attributes
            EngineChannel*              pEngineChannel;
            Engine*                     pEngine;            ///< Pointer to the sampler engine, to be able to access the event lists.
            float                       Volume;             ///< Volume level of the voice
            float                       PanLeft;
            float                       PanRight;
            float                       CrossfadeVolume;    ///< Current attenuation level caused by a crossfade (only if a crossfade is defined of course)
            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                       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
            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;
            static const float          FILTER_CUTOFF_COEFF;
            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                       fFinalVolume;
            float                       fFinalCutoff;
            float                       fFinalResonance;
            SynthesisParam              finalSynthesisParameters;
            Loop                        loop;

            // Static Methods
            static float CalculateFilterCutoffCoeff();

            // Methods
            void KillImmediately();
            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);
            float getVolume();

            inline float CrossfadeAttenuation(uint8_t& CrossfadeControllerValue) {
                uint8_t c = std::max(CrossfadeControllerValue, pDimRgn->AttenuationControllerThreshold);
                float att = (!pDimRgn->Crossfade.out_end) ? c / 127.0f /* 0,0,0,0 means no crossfade defined */
                          : (c < pDimRgn->Crossfade.in_end) ?
                                ((c <= pDimRgn->Crossfade.in_start) ? 0.0f
                                : float(c - pDimRgn->Crossfade.in_start) / float(pDimRgn->Crossfade.in_end - pDimRgn->Crossfade.in_start))
                          : (c <= pDimRgn->Crossfade.out_start) ? 1.0f
                          : (c < pDimRgn->Crossfade.out_end) ? float(pDimRgn->Crossfade.out_end - c) / float(pDimRgn->Crossfade.out_end - pDimRgn->Crossfade.out_start)
                          : 0.0f;
                return pDimRgn->InvertAttenuationController ? 1 - att : att;
            }

            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	829	* Copyright (C) 2005, 2006 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			#include "../../common/global.h"
28
29	schoenebeck	505	#include <gig.h>
30
31	schoenebeck	53	#include "../../common/RTMath.h"
32			#include "../../common/RingBuffer.h"
33	schoenebeck	273	#include "../../common/Pool.h"
34	schoenebeck	203	#include "../../drivers/audio/AudioOutputDevice.h"
35	schoenebeck	80	#include "../common/BiquadFilter.h"
36	schoenebeck	53	#include "Engine.h"
37	schoenebeck	411	#include "EngineChannel.h"
38	schoenebeck	53	#include "Stream.h"
39			#include "DiskThread.h"
40	schoenebeck	738	#include "EGADSR.h"
41	schoenebeck	53	#include "EGDecay.h"
42			#include "Filter.h"
43	schoenebeck	738	#include "../common/LFOBase.h"
44	schoenebeck	770	#include "SynthesisParam.h"
45	schoenebeck	53
46	schoenebeck	738	// include the appropriate (unsigned) triangle LFO implementation
47			#if CONFIG_UNSIGNED_TRIANG_ALGO == INT_MATH_SOLUTION
48			# include "../common/LFOTriangleIntMath.h"
49			#elif CONFIG_UNSIGNED_TRIANG_ALGO == INT_ABS_MATH_SOLUTION
50			# include "../common/LFOTriangleIntAbsMath.h"
51			#elif CONFIG_UNSIGNED_TRIANG_ALGO == DI_HARMONIC_SOLUTION
52			# include "../common/LFOTriangleDiHarmonic.h"
53			#else
54			# error "Unknown or no (unsigned) triangle LFO implementation selected!"
55			#endif
56
57			// include the appropriate (signed) triangle LFO implementation
58			#if CONFIG_SIGNED_TRIANG_ALGO == INT_MATH_SOLUTION
59			# include "../common/LFOTriangleIntMath.h"
60			#elif CONFIG_SIGNED_TRIANG_ALGO == INT_ABS_MATH_SOLUTION
61			# include "../common/LFOTriangleIntAbsMath.h"
62			#elif CONFIG_SIGNED_TRIANG_ALGO == DI_HARMONIC_SOLUTION
63			# include "../common/LFOTriangleDiHarmonic.h"
64			#else
65			# error "Unknown or no (signed) triangle LFO implementation selected!"
66			#endif
67
68	schoenebeck	53	namespace LinuxSampler { namespace gig {
69
70			class Engine;
71
72			/// Reflects a MIDI controller
73			struct midi_ctrl {
74			uint8_t controller; ///< MIDI control change controller number
75			uint8_t value; ///< Current MIDI controller value
76			float fvalue; ///< Transformed / effective value (e.g. volume level or filter cutoff frequency)
77			};
78
79	schoenebeck	738	#if CONFIG_UNSIGNED_TRIANG_ALGO == INT_MATH_SOLUTION
80			typedef LFOTriangleIntMath<range_unsigned> LFOUnsigned;
81			#elif CONFIG_UNSIGNED_TRIANG_ALGO == INT_ABS_MATH_SOLUTION
82			typedef LFOTriangleIntAbsMath<range_unsigned> LFOUnsigned;
83			#elif CONFIG_UNSIGNED_TRIANG_ALGO == DI_HARMONIC_SOLUTION
84			typedef LFOTriangleDiHarmonic<range_unsigned> LFOUnsigned;
85			#endif
86
87			#if CONFIG_SIGNED_TRIANG_ALGO == INT_MATH_SOLUTION
88			typedef LFOTriangleIntMath<range_signed> LFOSigned;
89			#elif CONFIG_SIGNED_TRIANG_ALGO == INT_ABS_MATH_SOLUTION
90			typedef LFOTriangleIntAbsMath<range_signed> LFOSigned;
91			#elif CONFIG_SIGNED_TRIANG_ALGO == DI_HARMONIC_SOLUTION
92			typedef LFOTriangleDiHarmonic<range_signed> LFOSigned;
93			#endif
94
95	schoenebeck	53	/** Gig Voice
96			*
97			* Renders a voice for the Gigasampler format.
98			*/
99			class Voice {
100			public:
101	schoenebeck	242	// Types
102			enum type_t {
103			type_normal,
104			type_release_trigger_required, ///< If the key of this voice will be released, it causes a release triggered voice to be spawned
105			type_release_trigger ///< Release triggered voice which cannot be killed by releasing its key
106			};
107	schoenebeck	738
108	schoenebeck	53	// Attributes
109	schoenebeck	242	type_t Type; ///< Voice Type
110	schoenebeck	53	int MIDIKey; ///< MIDI key number of the key that triggered the voice
111	schoenebeck	239	uint KeyGroup;
112	schoenebeck	53	DiskThread* pDiskThread; ///< Pointer to the disk thread, to be able to order a disk stream and later to delete the stream again
113
114			// Methods
115			Voice();
116	letz	502	virtual ~Voice();
117	schoenebeck	271	void Kill(Pool<Event>::Iterator& itKillEvent);
118	schoenebeck	53	void Render(uint Samples);
119			void Reset();
120			void SetOutput(AudioOutputDevice* pAudioOutputDevice);
121			void SetEngine(Engine* pEngine);
122	schoenebeck	669	int Trigger(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent, int PitchBend, ::gig::DimensionRegion* pDimRgn, type_t VoiceType, int iKeyGroup);
123	schoenebeck	285	inline bool IsActive() { return PlaybackState; }
124	schoenebeck	663	inline bool IsStealable() { return !itKillEvent && PlaybackState >= playback_state_ram; }
125	schoenebeck	829	void UpdatePortamentoPos(Pool<Event>::Iterator& itNoteOffEvent);
126
127	schoenebeck	319	//private:
128	schoenebeck	53	// Types
129			enum playback_state_t {
130	schoenebeck	285	playback_state_end = 0,
131	schoenebeck	563	playback_state_init = 1,
132			playback_state_ram = 2,
133			playback_state_disk = 3
134	schoenebeck	53	};
135
136			// Attributes
137	schoenebeck	411	EngineChannel* pEngineChannel;
138			Engine* pEngine; ///< Pointer to the sampler engine, to be able to access the event lists.
139	schoenebeck	53	float Volume; ///< Volume level of the voice
140	schoenebeck	245	float PanLeft;
141			float PanRight;
142	schoenebeck	236	float CrossfadeVolume; ///< Current attenuation level caused by a crossfade (only if a crossfade is defined of course)
143	persson	783	double Pos; ///< Current playback position in sample
144	schoenebeck	319	float PitchBase; ///< Basic pitch depth, stays the same for the whole life time of the voice
145			float PitchBend; ///< Current pitch value of the pitchbend wheel
146	persson	729	float CutoffBase; ///< Cutoff frequency before control change, EG and LFO are applied
147	schoenebeck	53	::gig::Sample* pSample; ///< Pointer to the sample to be played back
148	schoenebeck	236	::gig::DimensionRegion* pDimRgn; ///< Pointer to the articulation information of current dimension region of this voice
149	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
150			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
151			Stream::reference_t DiskStreamRef; ///< Reference / link to the disk stream
152	schoenebeck	330	int RealSampleWordsLeftToRead; ///< Number of samples left to read, not including the silence added for the interpolator
153	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.
154			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
155	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
156	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
157	schoenebeck	738	EGADSR EG1; ///< Envelope Generator 1 (Amplification)
158			EGADSR EG2; ///< Envelope Generator 2 (Filter cutoff frequency)
159			EGDecay EG3; ///< Envelope Generator 3 (Pitch)
160	schoenebeck	53	midi_ctrl VCFCutoffCtrl;
161			midi_ctrl VCFResonanceCtrl;
162			static const float FILTER_CUTOFF_COEFF;
163	schoenebeck	738	LFOUnsigned* pLFO1; ///< Low Frequency Oscillator 1 (Amplification)
164			LFOUnsigned* pLFO2; ///< Low Frequency Oscillator 2 (Filter cutoff frequency)
165			LFOSigned* pLFO3; ///< Low Frequency Oscillator 3 (Pitch)
166	schoenebeck	687	bool bLFO1Enabled; ///< Should we use the Amplitude LFO for this voice?
167			bool bLFO2Enabled; ///< Should we use the Filter Cutoff LFO for this voice?
168			bool bLFO3Enabled; ///< Should we use the Pitch LFO for this voice?
169	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).
170	schoenebeck	319	//public: // FIXME: just made public for debugging (sanity check in Engine::RenderAudio()), should be changed to private before the final release
171	schoenebeck	271	Pool<Event>::Iterator itKillEvent; ///< Event which caused this voice to be killed
172	schoenebeck	319	//private:
173			int SynthesisMode;
174	schoenebeck	738	float fFinalVolume;
175			float fFinalCutoff;
176			float fFinalResonance;
177	schoenebeck	770	SynthesisParam finalSynthesisParameters;
178			Loop loop;
179	schoenebeck	738
180	schoenebeck	53	// Static Methods
181			static float CalculateFilterCutoffCoeff();
182
183			// Methods
184	schoenebeck	319	void KillImmediately();
185			void ProcessEvents(uint Samples);
186	senkov	325	void Synthesize(uint Samples, sample_t* pSrc, uint Skip);
187	schoenebeck	738	void processTransitionEvents(RTList<Event>::Iterator& itEvent, uint End);
188			void processCCEvents(RTList<Event>::Iterator& itEvent, uint End);
189			void processPitchEvent(RTList<Event>::Iterator& itEvent);
190			void processCrossFadeEvent(RTList<Event>::Iterator& itEvent);
191			void processCutoffEvent(RTList<Event>::Iterator& itEvent);
192			void processResonanceEvent(RTList<Event>::Iterator& itEvent);
193	persson	830	float getVolume();
194	schoenebeck	245
195	schoenebeck	236	inline float CrossfadeAttenuation(uint8_t& CrossfadeControllerValue) {
196	persson	831	uint8_t c = std::max(CrossfadeControllerValue, pDimRgn->AttenuationControllerThreshold);
197			float att = (!pDimRgn->Crossfade.out_end) ? c / 127.0f /* 0,0,0,0 means no crossfade defined */
198			: (c < pDimRgn->Crossfade.in_end) ?
199			((c <= pDimRgn->Crossfade.in_start) ? 0.0f
200			: float(c - pDimRgn->Crossfade.in_start) / float(pDimRgn->Crossfade.in_end - pDimRgn->Crossfade.in_start))
201			: (c <= pDimRgn->Crossfade.out_start) ? 1.0f
202			: (c < pDimRgn->Crossfade.out_end) ? float(pDimRgn->Crossfade.out_end - c) / float(pDimRgn->Crossfade.out_end - pDimRgn->Crossfade.out_start)
203	schoenebeck	348	: 0.0f;
204			return pDimRgn->InvertAttenuationController ? 1 - att : att;
205	schoenebeck	236	}
206
207	schoenebeck	53	inline float Constrain(float ValueToCheck, float Min, float Max) {
208			if (ValueToCheck > Max) ValueToCheck = Max;
209			else if (ValueToCheck < Min) ValueToCheck = Min;
210			return ValueToCheck;
211			}
212			};
213
214			}} // namespace LinuxSampler::gig
215
216			#endif // __LS_GIG_VOICE_H__