engines/gig/Voice.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 - 2013 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_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/VoiceBase.h"
#include "SynthesisParam.h"
#include "SmoothVolume.h"
#include "EngineChannel.h"

namespace LinuxSampler { namespace gig {
    class Engine;
    class EngineChannel;

    /** Gig Voice
     *
     * Renders a voice for the Gigasampler format.
     */
    class Voice : public LinuxSampler::VoiceBase<EngineChannel, ::gig::DimensionRegion, ::gig::Sample, DiskThread> {
        public:
            Voice();
            virtual ~Voice();
            void SetOutput(AudioOutputDevice* pAudioOutputDevice);
            void SetEngine(LinuxSampler::Engine* pEngine);
            void CalculateFadeOutCoeff(float FadeOutTime, float SampleRate);

        protected:
            virtual SampleInfo       GetSampleInfo();
            virtual RegionInfo       GetRegionInfo();
            virtual InstrumentInfo   GetInstrumentInfo();
            virtual double           CalculateCrossfadeVolume(uint8_t MIDIKeyVelocity);
            virtual AbstractEngine*  GetEngine() { return (AbstractEngine*)pEngine; }
            virtual double           GetEG1ControllerValue(uint8_t MIDIKeyVelocity);
            virtual EGInfo           CalculateEG1ControllerInfluence(double eg1ControllerValue);
            virtual void             TriggerEG1(const EGInfo& egInfo, double velrelease, double velocityAttenuation, uint sampleRate, uint8_t velocity);
            virtual double           GetEG2ControllerValue(uint8_t MIDIKeyVelocity);
            virtual EGInfo           CalculateEG2ControllerInfluence(double eg2ControllerValue);
            virtual void             TriggerEG2(const EGInfo& egInfo, double velrelease, double velocityAttenuation, uint sampleRate, uint8_t velocity);
            virtual void             InitLFO1();
            virtual void             InitLFO2();
            virtual void             InitLFO3();
            virtual float            CalculateCutoffBase(uint8_t MIDIKeyVelocity);
            virtual float            CalculateFinalCutoff(float cutoffBase);
            virtual uint8_t          GetVCFCutoffCtrl();
            virtual uint8_t          GetVCFResonanceCtrl();
            virtual void             ProcessCCEvent(RTList<Event>::Iterator& itEvent) OVERRIDE;
            virtual void             ProcessChannelPressureEvent(RTList<Event>::Iterator& itEvent) OVERRIDE;
            virtual void             ProcessPolyphonicKeyPressureEvent(RTList<Event>::Iterator& itEvent) OVERRIDE;
            virtual void             ProcessCutoffEvent(RTList<Event>::Iterator& itEvent);
            virtual double           GetVelocityAttenuation(uint8_t MIDIKeyVelocity);
            virtual double           GetVelocityRelease(uint8_t MIDIKeyVelocity);
            virtual double           GetSampleAttenuation();
            virtual void             ProcessGroupEvent(RTList<Event>::Iterator& itEvent);
            virtual int              CalculatePan(uint8_t pan);

        private:
            EGADSR EG1;
            EGADSR EG2;

        public: // FIXME: just made public for debugging (sanity check in Engine::RenderAudio()), should be changed to private before the final release
            // Attributes
            Engine*                     pEngine;            ///< Pointer to the sampler engine, to be able to access the event lists.
            //uint                        LoopCyclesLeft;     ///< In case there is a RAMLoop and it's not an endless loop; reflects number of loop cycles left to be passed

            // Static Methods
            static float CalculateFilterCutoffCoeff();

            // Methods
            void ProcessEvents(uint Samples);
            void processCrossFadeEvent(RTList<Event>::Iterator& itEvent);

            EngineChannel* GetGigEngineChannel();

        protected:
            virtual uint8_t CrossfadeAttenuation(uint8_t& CrossfadeControllerValue) {
                uint8_t c = std::max(CrossfadeControllerValue, pRegion->AttenuationControllerThreshold);
                c = (!pRegion->Crossfade.out_end) ? c /* 0,0,0,0 means no crossfade defined */
                          : (c < pRegion->Crossfade.in_end) ?
                                ((c <= pRegion->Crossfade.in_start) ? 0
                                : 127 * (c - pRegion->Crossfade.in_start) / (pRegion->Crossfade.in_end - pRegion->Crossfade.in_start))
                          : (c <= pRegion->Crossfade.out_start) ? 127
                          : (c < pRegion->Crossfade.out_end) ? 127 * (pRegion->Crossfade.out_end - c) / (pRegion->Crossfade.out_end - pRegion->Crossfade.out_start)
                          : 0;
                return pRegion->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	/***************************************************************************
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 - 2013 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_GIG_VOICE_H__
26	#define __LS_GIG_VOICE_H__
27
28	#include "../../common/global_private.h"
29
30	#include <gig.h>
31
32	#include "../../common/RTMath.h"
33	#include "../../common/Pool.h"
34	#include "../../drivers/audio/AudioOutputDevice.h"
35	#include "Stream.h"
36	#include "DiskThread.h"
37	#include "EGADSR.h"
38	#include "EGDecay.h"
39	#include "Filter.h"
40	#include "../common/VoiceBase.h"
41	#include "SynthesisParam.h"
42	#include "SmoothVolume.h"
43	#include "EngineChannel.h"
44
45	namespace LinuxSampler { namespace gig {
46	class Engine;
47	class EngineChannel;
48
49	/** Gig Voice
50	*
51	* Renders a voice for the Gigasampler format.
52	*/
53	class Voice : public LinuxSampler::VoiceBase<EngineChannel, ::gig::DimensionRegion, ::gig::Sample, DiskThread> {
54	public:
55	Voice();
56	virtual ~Voice();
57	void SetOutput(AudioOutputDevice* pAudioOutputDevice);
58	void SetEngine(LinuxSampler::Engine* pEngine);
59	void CalculateFadeOutCoeff(float FadeOutTime, float SampleRate);
60
61	protected:
62	virtual SampleInfo GetSampleInfo();
63	virtual RegionInfo GetRegionInfo();
64	virtual InstrumentInfo GetInstrumentInfo();
65	virtual double CalculateCrossfadeVolume(uint8_t MIDIKeyVelocity);
66	virtual AbstractEngine* GetEngine() { return (AbstractEngine*)pEngine; }
67	virtual double GetEG1ControllerValue(uint8_t MIDIKeyVelocity);
68	virtual EGInfo CalculateEG1ControllerInfluence(double eg1ControllerValue);
69	virtual void TriggerEG1(const EGInfo& egInfo, double velrelease, double velocityAttenuation, uint sampleRate, uint8_t velocity);
70	virtual double GetEG2ControllerValue(uint8_t MIDIKeyVelocity);
71	virtual EGInfo CalculateEG2ControllerInfluence(double eg2ControllerValue);
72	virtual void TriggerEG2(const EGInfo& egInfo, double velrelease, double velocityAttenuation, uint sampleRate, uint8_t velocity);
73	virtual void InitLFO1();
74	virtual void InitLFO2();
75	virtual void InitLFO3();
76	virtual float CalculateCutoffBase(uint8_t MIDIKeyVelocity);
77	virtual float CalculateFinalCutoff(float cutoffBase);
78	virtual uint8_t GetVCFCutoffCtrl();
79	virtual uint8_t GetVCFResonanceCtrl();
80	virtual void ProcessCCEvent(RTList<Event>::Iterator& itEvent) OVERRIDE;
81	virtual void ProcessChannelPressureEvent(RTList<Event>::Iterator& itEvent) OVERRIDE;
82	virtual void ProcessPolyphonicKeyPressureEvent(RTList<Event>::Iterator& itEvent) OVERRIDE;
83	virtual void ProcessCutoffEvent(RTList<Event>::Iterator& itEvent);
84	virtual double GetVelocityAttenuation(uint8_t MIDIKeyVelocity);
85	virtual double GetVelocityRelease(uint8_t MIDIKeyVelocity);
86	virtual double GetSampleAttenuation();
87	virtual void ProcessGroupEvent(RTList<Event>::Iterator& itEvent);
88	virtual int CalculatePan(uint8_t pan);
89
90	private:
91	EGADSR EG1;
92	EGADSR EG2;
93
94	public: // FIXME: just made public for debugging (sanity check in Engine::RenderAudio()), should be changed to private before the final release
95	// Attributes
96	Engine* pEngine; ///< Pointer to the sampler engine, to be able to access the event lists.
97	//uint LoopCyclesLeft; ///< In case there is a RAMLoop and it's not an endless loop; reflects number of loop cycles left to be passed
98
99	// Static Methods
100	static float CalculateFilterCutoffCoeff();
101
102	// Methods
103	void ProcessEvents(uint Samples);
104	void processCrossFadeEvent(RTList<Event>::Iterator& itEvent);
105
106	EngineChannel* GetGigEngineChannel();
107
108	protected:
109	virtual uint8_t CrossfadeAttenuation(uint8_t& CrossfadeControllerValue) {
110	uint8_t c = std::max(CrossfadeControllerValue, pRegion->AttenuationControllerThreshold);
111	c = (!pRegion->Crossfade.out_end) ? c /* 0,0,0,0 means no crossfade defined */
112	: (c < pRegion->Crossfade.in_end) ?
113	((c <= pRegion->Crossfade.in_start) ? 0
114	: 127 * (c - pRegion->Crossfade.in_start) / (pRegion->Crossfade.in_end - pRegion->Crossfade.in_start))
115	: (c <= pRegion->Crossfade.out_start) ? 127
116	: (c < pRegion->Crossfade.out_end) ? 127 * (pRegion->Crossfade.out_end - c) / (pRegion->Crossfade.out_end - pRegion->Crossfade.out_start)
117	: 0;
118	return pRegion->InvertAttenuationController ? 127 - c : c;
119	}
120
121	inline float Constrain(float ValueToCheck, float Min, float Max) {
122	if (ValueToCheck > Max) ValueToCheck = Max;
123	else if (ValueToCheck < Min) ValueToCheck = Min;
124	return ValueToCheck;
125	}
126	};
127
128	}} // namespace LinuxSampler::gig
129
130	#endif // __LS_GIG_VOICE_H__