/[svn]/linuxsampler/trunk/src/engines/gig/Voice.h
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revision 563 by schoenebeck, Sun May 22 20:43:32 2005 UTC revision 877 by persson, Sun Jun 25 13:54:17 2006 UTC
# Line 3  Line 3 
3   *   LinuxSampler - modular, streaming capable sampler                     *   *   LinuxSampler - modular, streaming capable sampler                     *
4   *                                                                         *   *                                                                         *
5   *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *   *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *
6   *   Copyright (C) 2005 Christian Schoenebeck                              *   *   Copyright (C) 2005, 2006 Christian Schoenebeck                        *
7   *                                                                         *   *                                                                         *
8   *   This program is free software; you can redistribute it and/or modify  *   *   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  *   *   it under the terms of the GNU General Public License as published by  *
# Line 29  Line 29 
29  #include <gig.h>  #include <gig.h>
30    
31  #include "../../common/RTMath.h"  #include "../../common/RTMath.h"
 #include "../../common/RingBuffer.h"  
32  #include "../../common/Pool.h"  #include "../../common/Pool.h"
33  #include "../../drivers/audio/AudioOutputDevice.h"  #include "../../drivers/audio/AudioOutputDevice.h"
 #include "../common/BiquadFilter.h"  
 //#include "EngineGlobals.h"  
34  #include "Engine.h"  #include "Engine.h"
35  #include "EngineChannel.h"  #include "EngineChannel.h"
36  #include "Stream.h"  #include "Stream.h"
37  #include "DiskThread.h"  #include "DiskThread.h"
38    #include "EGADSR.h"
39  #include "EGDecay.h"  #include "EGDecay.h"
40  #include "Filter.h"  #include "Filter.h"
41  #include "../common/LFO.h"  #include "../common/LFOBase.h"
42    #include "SynthesisParam.h"
43    #include "SmoothVolume.h"
44    
45    // include the appropriate (unsigned) triangle LFO implementation
46    #if CONFIG_UNSIGNED_TRIANG_ALGO == INT_MATH_SOLUTION
47    # include "../common/LFOTriangleIntMath.h"
48    #elif CONFIG_UNSIGNED_TRIANG_ALGO == INT_ABS_MATH_SOLUTION
49    # include "../common/LFOTriangleIntAbsMath.h"
50    #elif CONFIG_UNSIGNED_TRIANG_ALGO == DI_HARMONIC_SOLUTION
51    # include "../common/LFOTriangleDiHarmonic.h"
52    #else
53    # error "Unknown or no (unsigned) triangle LFO implementation selected!"
54    #endif
55    
56    // include the appropriate (signed) triangle LFO implementation
57    #if CONFIG_SIGNED_TRIANG_ALGO == INT_MATH_SOLUTION
58    # include "../common/LFOTriangleIntMath.h"
59    #elif CONFIG_SIGNED_TRIANG_ALGO == INT_ABS_MATH_SOLUTION
60    # include "../common/LFOTriangleIntAbsMath.h"
61    #elif CONFIG_SIGNED_TRIANG_ALGO == DI_HARMONIC_SOLUTION
62    # include "../common/LFOTriangleDiHarmonic.h"
63    #else
64    # error "Unknown or no (signed) triangle LFO implementation selected!"
65    #endif
66    
67  namespace LinuxSampler { namespace gig {  namespace LinuxSampler { namespace gig {
68    
69      class Engine;      class Engine;
     class EGADSR;  
     class EGDecay;  
     class VCAManipulator;  
     class VCFCManipulator;  
     class VCOManipulator;  
70    
71      /// Reflects a MIDI controller      /// Reflects a MIDI controller
72      struct midi_ctrl {      struct midi_ctrl {
# Line 59  namespace LinuxSampler { namespace gig { Line 75  namespace LinuxSampler { namespace gig {
75          float   fvalue;     ///< Transformed / effective value (e.g. volume level or filter cutoff frequency)          float   fvalue;     ///< Transformed / effective value (e.g. volume level or filter cutoff frequency)
76      };      };
77    
78        #if CONFIG_UNSIGNED_TRIANG_ALGO == INT_MATH_SOLUTION
79        typedef LFOTriangleIntMath<range_unsigned> LFOUnsigned;
80        #elif CONFIG_UNSIGNED_TRIANG_ALGO == INT_ABS_MATH_SOLUTION
81        typedef LFOTriangleIntAbsMath<range_unsigned> LFOUnsigned;
82        #elif CONFIG_UNSIGNED_TRIANG_ALGO == DI_HARMONIC_SOLUTION
83        typedef LFOTriangleDiHarmonic<range_unsigned> LFOUnsigned;
84        #endif
85    
86        #if CONFIG_SIGNED_TRIANG_ALGO == INT_MATH_SOLUTION
87        typedef LFOTriangleIntMath<range_signed> LFOSigned;
88        #elif CONFIG_SIGNED_TRIANG_ALGO == INT_ABS_MATH_SOLUTION
89        typedef LFOTriangleIntAbsMath<range_signed> LFOSigned;
90        #elif CONFIG_SIGNED_TRIANG_ALGO == DI_HARMONIC_SOLUTION
91        typedef LFOTriangleDiHarmonic<range_signed> LFOSigned;
92        #endif
93    
94      /** Gig Voice      /** Gig Voice
95       *       *
96       * Renders a voice for the Gigasampler format.       * Renders a voice for the Gigasampler format.
# Line 86  namespace LinuxSampler { namespace gig { Line 118  namespace LinuxSampler { namespace gig {
118              void Reset();              void Reset();
119              void SetOutput(AudioOutputDevice* pAudioOutputDevice);              void SetOutput(AudioOutputDevice* pAudioOutputDevice);
120              void SetEngine(Engine* pEngine);              void SetEngine(Engine* pEngine);
121              int  Trigger(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent, int PitchBend, ::gig::Instrument* pInstrument, int iLayer, bool ReleaseTriggerVoice, bool VoiceStealingAllowed);              int  Trigger(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent, int PitchBend, ::gig::DimensionRegion* pDimRgn, type_t VoiceType, int iKeyGroup);
122              inline bool IsActive() { return PlaybackState; }              inline bool IsActive() { return PlaybackState; }
123              inline bool hasRendered() { return PlaybackState >= playback_state_ram; }              inline bool IsStealable() { return !itKillEvent && PlaybackState >= playback_state_ram; }
124                void UpdatePortamentoPos(Pool<Event>::Iterator& itNoteOffEvent);
125    
126          //private:          //private:
127              // Types              // Types
128              enum playback_state_t {              enum playback_state_t {
# Line 101  namespace LinuxSampler { namespace gig { Line 135  namespace LinuxSampler { namespace gig {
135              // Attributes              // Attributes
136              EngineChannel*              pEngineChannel;              EngineChannel*              pEngineChannel;
137              Engine*                     pEngine;            ///< Pointer to the sampler engine, to be able to access the event lists.              Engine*                     pEngine;            ///< Pointer to the sampler engine, to be able to access the event lists.
138              float                       Volume;             ///< Volume level of the voice              float                       VolumeLeft;         ///< Left channel volume. This factor is calculated when the voice is triggered and doesn't change after that.
139              float                       PanLeft;              float                       VolumeRight;        ///< Right channel volume. This factor is calculated when the voice is triggered and doesn't change after that.
140              float                       PanRight;              SmoothVolume                CrossfadeSmoother;  ///< Crossfade volume, updated by crossfade CC events
141              float                       CrossfadeVolume;    ///< Current attenuation level caused by a crossfade (only if a crossfade is defined of course)              SmoothVolume                VolumeSmoother;     ///< Volume, updated by CC 7 (volume) events
142                SmoothVolume                PanLeftSmoother;    ///< Left channel volume, updated by CC 10 (pan) events
143                SmoothVolume                PanRightSmoother;   ///< Right channel volume, updated by CC 10 (pan) events
144              double                      Pos;                ///< Current playback position in sample              double                      Pos;                ///< Current playback position in sample
145              float                       PitchBase;          ///< Basic pitch depth, stays the same for the whole life time of the voice              float                       PitchBase;          ///< Basic pitch depth, stays the same for the whole life time of the voice
146              float                       PitchBend;          ///< Current pitch value of the pitchbend wheel              float                       PitchBend;          ///< Current pitch value of the pitchbend wheel
147                float                       CutoffBase;         ///< Cutoff frequency before control change, EG and LFO are applied
148              ::gig::Sample*              pSample;            ///< Pointer to the sample to be played back              ::gig::Sample*              pSample;            ///< Pointer to the sample to be played back
             ::gig::Region*              pRegion;            ///< Pointer to the articulation information of the respective keyboard region of this voice  
149              ::gig::DimensionRegion*     pDimRgn;            ///< Pointer to the articulation information of current dimension region of this voice              ::gig::DimensionRegion*     pDimRgn;            ///< Pointer to the articulation information of current dimension region of this voice
150              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              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
151              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                        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
# Line 117  namespace LinuxSampler { namespace gig { Line 153  namespace LinuxSampler { namespace gig {
153              int                         RealSampleWordsLeftToRead; ///< Number of samples left to read, not including the silence added for the interpolator              int                         RealSampleWordsLeftToRead; ///< Number of samples left to read, not including the silence added for the interpolator
154              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.              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.
155              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              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
156              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                        LoopCyclesLeft;     ///< In case there is a RAMLoop and it's not an endless loop; reflects number of loop cycles left to be passed
157              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              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
158              EGADSR*                     pEG1;               ///< Envelope Generator 1 (Amplification)              EGADSR                      EG1;                ///< Envelope Generator 1 (Amplification)
159              EGADSR*                     pEG2;               ///< Envelope Generator 2 (Filter cutoff frequency)              EGADSR                      EG2;                ///< Envelope Generator 2 (Filter cutoff frequency)
160              EGDecay*                    pEG3;               ///< Envelope Generator 3 (Pitch)              EGDecay                     EG3;                ///< Envelope Generator 3 (Pitch)
             Filter                      FilterLeft;  
             Filter                      FilterRight;  
161              midi_ctrl                   VCFCutoffCtrl;              midi_ctrl                   VCFCutoffCtrl;
162              midi_ctrl                   VCFResonanceCtrl;              midi_ctrl                   VCFResonanceCtrl;
163              int                         FilterUpdateCounter; ///< Used to update filter parameters all FILTER_UPDATE_PERIOD samples              LFOUnsigned*                pLFO1;               ///< Low Frequency Oscillator 1 (Amplification)
164              static const float          FILTER_CUTOFF_COEFF;              LFOUnsigned*                pLFO2;               ///< Low Frequency Oscillator 2 (Filter cutoff frequency)
165              static const int            FILTER_UPDATE_MASK;              LFOSigned*                  pLFO3;               ///< Low Frequency Oscillator 3 (Pitch)
166              VCAManipulator*             pVCAManipulator;              bool                        bLFO1Enabled;        ///< Should we use the Amplitude LFO for this voice?
167              VCFCManipulator*            pVCFCManipulator;              bool                        bLFO2Enabled;        ///< Should we use the Filter Cutoff LFO for this voice?
168              VCOManipulator*             pVCOManipulator;              bool                        bLFO3Enabled;        ///< Should we use the Pitch LFO for this voice?
             LFO<gig::VCAManipulator>*   pLFO1;              ///< Low Frequency Oscillator 1 (Amplification)  
             LFO<gig::VCFCManipulator>*  pLFO2;             ///< Low Frequency Oscillator 2 (Filter cutoff frequency)  
             LFO<gig::VCOManipulator>*   pLFO3;              ///< Low Frequency Oscillator 3 (Pitch)  
169              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       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          //public: // FIXME: just made public for debugging (sanity check in Engine::RenderAudio()), should be changed to private before the final release          //public: // FIXME: just made public for debugging (sanity check in Engine::RenderAudio()), should be changed to private before the final release
171              Pool<Event>::Iterator       itKillEvent;         ///< Event which caused this voice to be killed              Pool<Event>::Iterator       itKillEvent;         ///< Event which caused this voice to be killed
172          //private:          //private:
173              int                         SynthesisMode;              int                         SynthesisMode;
174                float                       fFinalCutoff;
175                float                       fFinalResonance;
176                SynthesisParam              finalSynthesisParameters;
177                Loop                        loop;
178    
179              // Static Methods              // Static Methods
180              static float CalculateFilterCutoffCoeff();              static float CalculateFilterCutoffCoeff();
             static int   CalculateFilterUpdateMask();  
181    
182              // Methods              // Methods
183              void KillImmediately();              void KillImmediately();
184              void ProcessEvents(uint Samples);              void ProcessEvents(uint Samples);
             void CalculateBiquadParameters(uint Samples);  
185              void Synthesize(uint Samples, sample_t* pSrc, uint Skip);              void Synthesize(uint Samples, sample_t* pSrc, uint Skip);
186                void processTransitionEvents(RTList<Event>::Iterator& itEvent, uint End);
187              inline float CrossfadeAttenuation(uint8_t& CrossfadeControllerValue) {              void processCCEvents(RTList<Event>::Iterator& itEvent, uint End);
188                  float att = (!pDimRgn->Crossfade.out_end) ? CrossfadeControllerValue / 127.0f /* 0,0,0,0 means no crossfade defined */              void processPitchEvent(RTList<Event>::Iterator& itEvent);
189                            : (CrossfadeControllerValue < pDimRgn->Crossfade.in_end) ?              void processCrossFadeEvent(RTList<Event>::Iterator& itEvent);
190                                  ((CrossfadeControllerValue <= pDimRgn->Crossfade.in_start) ? 0.0f              void processCutoffEvent(RTList<Event>::Iterator& itEvent);
191                                  : float(CrossfadeControllerValue - pDimRgn->Crossfade.in_start) / float(pDimRgn->Crossfade.in_end - pDimRgn->Crossfade.in_start))              void processResonanceEvent(RTList<Event>::Iterator& itEvent);
192                            : (CrossfadeControllerValue <= pDimRgn->Crossfade.out_start) ? 1.0f  
193                            : (CrossfadeControllerValue < pDimRgn->Crossfade.out_end) ? float(pDimRgn->Crossfade.out_end - CrossfadeControllerValue) / float(pDimRgn->Crossfade.out_end - pDimRgn->Crossfade.out_start)              inline uint8_t CrossfadeAttenuation(uint8_t& CrossfadeControllerValue) {
194                            : 0.0f;                  uint8_t c = std::max(CrossfadeControllerValue, pDimRgn->AttenuationControllerThreshold);
195                  return pDimRgn->InvertAttenuationController ? 1 - att : att;                  c = (!pDimRgn->Crossfade.out_end) ? c /* 0,0,0,0 means no crossfade defined */
196                              : (c < pDimRgn->Crossfade.in_end) ?
197                                    ((c <= pDimRgn->Crossfade.in_start) ? 0
198                                    : 127 * (c - pDimRgn->Crossfade.in_start) / (pDimRgn->Crossfade.in_end - pDimRgn->Crossfade.in_start))
199                              : (c <= pDimRgn->Crossfade.out_start) ? 127
200                              : (c < pDimRgn->Crossfade.out_end) ? 127 * (pDimRgn->Crossfade.out_end - c) / (pDimRgn->Crossfade.out_end - pDimRgn->Crossfade.out_start)
201                              : 0;
202                    return pDimRgn->InvertAttenuationController ? 127 - c : c;
203              }              }
204    
205              inline float Constrain(float ValueToCheck, float Min, float Max) {              inline float Constrain(float ValueToCheck, float Min, float Max) {
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