/[svn]/linuxsampler/trunk/src/engines/gig/Voice.h
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revision 203 by schoenebeck, Tue Jul 13 22:44:13 2004 UTC revision 770 by schoenebeck, Sun Sep 11 15:56:29 2005 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                              *
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 25  Line 26 
26    
27  #include "../../common/global.h"  #include "../../common/global.h"
28    
29  #if DEBUG_HEADERS  #include <gig.h>
 # warning Voice.h included  
 #endif // DEBUG_HEADERS  
30    
31  #include "../../common/RTMath.h"  #include "../../common/RTMath.h"
32  #include "../../common/RingBuffer.h"  #include "../../common/RingBuffer.h"
33  #include "../../common/RTELMemoryPool.h"  #include "../../common/Pool.h"
34  #include "../../drivers/audio/AudioOutputDevice.h"  #include "../../drivers/audio/AudioOutputDevice.h"
 #include "../../lib/fileloader/libgig/gig.h"  
35  #include "../common/BiquadFilter.h"  #include "../common/BiquadFilter.h"
36  #include "Engine.h"  #include "Engine.h"
37    #include "EngineChannel.h"
38  #include "Stream.h"  #include "Stream.h"
39  #include "DiskThread.h"  #include "DiskThread.h"
40    #include "EGADSR.h"
41  #include "EGDecay.h"  #include "EGDecay.h"
42  #include "Filter.h"  #include "Filter.h"
43  #include "../common/LFO.h"  #include "../common/LFOBase.h"
44    #include "SynthesisParam.h"
 #define USE_LINEAR_INTERPOLATION        0  ///< set to 0 if you prefer cubic interpolation (slower, better quality)  
 #define ENABLE_FILTER                   1  ///< if set to 0 then filter (VCF) code is ignored on compile time  
 #define FILTER_UPDATE_PERIOD            64 ///< amount of sample points after which filter parameters (cutoff, resonance) are going to be updated (higher value means less CPU load, but also worse parameter resolution, this value will be aligned to a power of two)  
 #define FORCE_FILTER_USAGE              0  ///< if set to 1 then filter is always used, if set to 0 filter is used only in case the instrument file defined one  
 #define FILTER_CUTOFF_MAX               10000.0f ///< maximum cutoff frequency (10kHz)  
 #define FILTER_CUTOFF_MIN               100.0f   ///< minimum cutoff frequency (100Hz)  
   
 // Uncomment following line to override external cutoff controller  
 //#define OVERRIDE_FILTER_CUTOFF_CTRL   1  ///< set to an arbitrary MIDI control change controller (e.g. 1 for 'modulation wheel')  
45    
46  // Uncomment following line to override external resonance controller  // include the appropriate (unsigned) triangle LFO implementation
47  //#define OVERRIDE_FILTER_RES_CTRL      91  ///< set to an arbitrary MIDI control change controller (e.g. 91 for 'effect 1 depth')  #if CONFIG_UNSIGNED_TRIANG_ALGO == INT_MATH_SOLUTION
48    # include "../common/LFOTriangleIntMath.h"
49  // Uncomment following line to override filter type  #elif CONFIG_UNSIGNED_TRIANG_ALGO == INT_ABS_MATH_SOLUTION
50  //#define OVERRIDE_FILTER_TYPE          ::gig::vcf_type_lowpass  ///< either ::gig::vcf_type_lowpass, ::gig::vcf_type_bandpass or ::gig::vcf_type_highpass  # 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  namespace LinuxSampler { namespace gig {  namespace LinuxSampler { namespace gig {
69    
70      class Engine;      class Engine;
     class EGADSR;  
     class VCAManipulator;  
     class VCFCManipulator;  
     class VCOManipulator;  
71    
72      /// Reflects a MIDI controller      /// Reflects a MIDI controller
73      struct midi_ctrl {      struct midi_ctrl {
# Line 74  namespace LinuxSampler { namespace gig { Line 76  namespace LinuxSampler { namespace gig {
76          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)
77      };      };
78    
79        #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      /** Gig Voice      /** Gig Voice
96       *       *
97       * Renders a voice for the Gigasampler format.       * Renders a voice for the Gigasampler format.
98       */       */
99      class Voice {      class Voice {
100          public:          public:
101                // 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                
108              // Attributes              // Attributes
109                type_t       Type;         ///< Voice Type
110              int          MIDIKey;      ///< MIDI key number of the key that triggered the voice              int          MIDIKey;      ///< MIDI key number of the key that triggered the voice
111                uint         KeyGroup;
112              DiskThread*  pDiskThread;  ///< Pointer to the disk thread, to be able to order a disk stream and later to delete the stream again              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              // Methods
115              Voice();              Voice();
116             ~Voice();              virtual ~Voice();
117              void Kill();              void Kill(Pool<Event>::Iterator& itKillEvent);
118              void Render(uint Samples);              void Render(uint Samples);
119              void Reset();              void Reset();
120              void SetOutput(AudioOutputDevice* pAudioOutputDevice);              void SetOutput(AudioOutputDevice* pAudioOutputDevice);
121              void SetEngine(Engine* pEngine);              void SetEngine(Engine* pEngine);
122              int  Trigger(Event* pNoteOnEvent, int PitchBend, ::gig::Instrument* pInstrument);              int  Trigger(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent, int PitchBend, ::gig::DimensionRegion* pDimRgn, type_t VoiceType, int iKeyGroup);
123              inline bool IsActive() { return Active; }              inline bool IsActive() { return PlaybackState; }
124          private:              inline bool IsStealable() { return !itKillEvent && PlaybackState >= playback_state_ram; }
125            //private:
126              // Types              // Types
127              enum playback_state_t {              enum playback_state_t {
128                  playback_state_ram,                  playback_state_end  = 0,
129                  playback_state_disk,                  playback_state_init = 1,
130                  playback_state_end                  playback_state_ram  = 2,
131                    playback_state_disk = 3
132              };              };
133    
134              // Attributes              // Attributes
135              gig::Engine*                pEngine;            ///< Pointer to the sampler engine, to be able to access the event lists.              EngineChannel*              pEngineChannel;
136                Engine*                     pEngine;            ///< Pointer to the sampler engine, to be able to access the event lists.
137              float                       Volume;             ///< Volume level of the voice              float                       Volume;             ///< Volume level of the voice
138              float*                      pOutputLeft;        ///< Audio output channel buffer (left)              float                       PanLeft;
139              float*                      pOutputRight;       ///< Audio output channel buffer (right)              float                       PanRight;
140              uint                        SampleRate;         ///< Sample rate of the engines output audio signal (in Hz)              float                       CrossfadeVolume;    ///< Current attenuation level caused by a crossfade (only if a crossfade is defined of course)
141              uint                        MaxSamplesPerCycle; ///< Size of each audio output buffer              //double                      Pos;                ///< Current playback position in sample
142              double                      Pos;                ///< Current playback position in sample              float                       PitchBase;          ///< Basic pitch depth, stays the same for the whole life time of the voice
143              double                      PitchBase;          ///< Basic pitch depth, stays the same for the whole life time of the voice              float                       PitchBend;          ///< Current pitch value of the pitchbend wheel
144              double                      PitchBend;          ///< Current pitch value of the pitchbend wheel              float                       CutoffBase;         ///< Cutoff frequency before control change, EG and LFO are applied
145              ::gig::Sample*              pSample;            ///< Pointer to the sample to be played back              ::gig::Sample*              pSample;            ///< Pointer to the sample to be played back
146              ::gig::Region*              pRegion;            ///< Pointer to the articulation information of the respective keyboard region of this voice              ::gig::DimensionRegion*     pDimRgn;            ///< Pointer to the articulation information of current dimension region of this voice
             bool                        Active;             ///< If this voice object is currently in usage  
147              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
148              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
149              Stream::reference_t         DiskStreamRef;      ///< Reference / link to the disk stream              Stream::reference_t         DiskStreamRef;      ///< Reference / link to the disk stream
150                int                         RealSampleWordsLeftToRead; ///< Number of samples left to read, not including the silence added for the interpolator
151              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.
152              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
153              int                         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
154              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
155              EGADSR*                     pEG1;               ///< Envelope Generator 1 (Amplification)              EGADSR                      EG1;                ///< Envelope Generator 1 (Amplification)
156              EGADSR*                     pEG2;               ///< Envelope Generator 2 (Filter cutoff frequency)              EGADSR                      EG2;                ///< Envelope Generator 2 (Filter cutoff frequency)
157              EGDecay*                    pEG3;               ///< Envelope Generator 3 (Pitch)              EGDecay                     EG3;                ///< Envelope Generator 3 (Pitch)
             Filter                      FilterLeft;  
             Filter                      FilterRight;  
158              midi_ctrl                   VCFCutoffCtrl;              midi_ctrl                   VCFCutoffCtrl;
159              midi_ctrl                   VCFResonanceCtrl;              midi_ctrl                   VCFResonanceCtrl;
             int                         FilterUpdateCounter; ///< Used to update filter parameters all FILTER_UPDATE_PERIOD samples  
160              static const float          FILTER_CUTOFF_COEFF;              static const float          FILTER_CUTOFF_COEFF;
161              static const int            FILTER_UPDATE_MASK;              LFOUnsigned*                pLFO1;               ///< Low Frequency Oscillator 1 (Amplification)
162              VCAManipulator*             pVCAManipulator;              LFOUnsigned*                pLFO2;               ///< Low Frequency Oscillator 2 (Filter cutoff frequency)
163              VCFCManipulator*            pVCFCManipulator;              LFOSigned*                  pLFO3;               ///< Low Frequency Oscillator 3 (Pitch)
164              VCOManipulator*             pVCOManipulator;              bool                        bLFO1Enabled;        ///< Should we use the Amplitude LFO for this voice?
165              LFO<gig::VCAManipulator>*   pLFO1;              ///< Low Frequency Oscillator 1 (Amplification)              bool                        bLFO2Enabled;        ///< Should we use the Filter Cutoff LFO for this voice?
166              LFO<gig::VCFCManipulator>*  pLFO2;             ///< Low Frequency Oscillator 2 (Filter cutoff frequency)              bool                        bLFO3Enabled;        ///< Should we use the Pitch LFO for this voice?
167              LFO<gig::VCOManipulator>*   pLFO3;              ///< Low Frequency Oscillator 3 (Pitch)              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).
168              Event*                      pTriggerEvent;      ///< 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
169                Pool<Event>::Iterator       itKillEvent;         ///< Event which caused this voice to be killed
170            //private:
171                int                         SynthesisMode;
172                float                       fFinalVolume;
173                float                       fFinalCutoff;
174                float                       fFinalResonance;
175                SynthesisParam              finalSynthesisParameters;
176                Loop                        loop;
177    
178              // Static Methods              // Static Methods
179              static float CalculateFilterCutoffCoeff();              static float CalculateFilterCutoffCoeff();
             static int   CalculateFilterUpdateMask();  
180    
181              // Methods              // Methods
182              void        ProcessEvents(uint Samples);              void KillImmediately();
183              #if ENABLE_FILTER              void ProcessEvents(uint Samples);
184              void        CalculateBiquadParameters(uint Samples);              void Synthesize(uint Samples, sample_t* pSrc, uint Skip);
185              #endif // ENABLE_FILTER              void processTransitionEvents(RTList<Event>::Iterator& itEvent, uint End);
186              void        Interpolate(uint Samples, sample_t* pSrc, uint Skip);              void processCCEvents(RTList<Event>::Iterator& itEvent, uint End);
187              void        InterpolateAndLoop(uint Samples, sample_t* pSrc, uint Skip);              void processPitchEvent(RTList<Event>::Iterator& itEvent);
188              inline void InterpolateOneStep_Stereo(sample_t* pSrc, int& i, float& effective_volume, float& pitch, biquad_param_t& bq_base, biquad_param_t& bq_main) {              void processCrossFadeEvent(RTList<Event>::Iterator& itEvent);
189                  int   pos_int   = RTMath::DoubleToInt(this->Pos);  // integer position              void processCutoffEvent(RTList<Event>::Iterator& itEvent);
190                  float pos_fract = this->Pos - pos_int;             // fractional part of position              void processResonanceEvent(RTList<Event>::Iterator& itEvent);
191                  pos_int <<= 1;  
192                inline float CrossfadeAttenuation(uint8_t& CrossfadeControllerValue) {
193                  #if USE_LINEAR_INTERPOLATION                  float att = (!pDimRgn->Crossfade.out_end) ? CrossfadeControllerValue / 127.0f /* 0,0,0,0 means no crossfade defined */
194                      #if ENABLE_FILTER                            : (CrossfadeControllerValue < pDimRgn->Crossfade.in_end) ?
195                          // left channel                                  ((CrossfadeControllerValue <= pDimRgn->Crossfade.in_start) ? 0.0f
196                          pOutputLeft[i]    += this->FilterLeft.Apply(&bq_base, &bq_main, effective_volume * (pSrc[pos_int]   + pos_fract * (pSrc[pos_int+2] - pSrc[pos_int])));                                  : float(CrossfadeControllerValue - pDimRgn->Crossfade.in_start) / float(pDimRgn->Crossfade.in_end - pDimRgn->Crossfade.in_start))
197                          // right channel                            : (CrossfadeControllerValue <= pDimRgn->Crossfade.out_start) ? 1.0f
198                          pOutputRight[i++] += this->FilterRight.Apply(&bq_base, &bq_main, effective_volume * (pSrc[pos_int+1] + pos_fract * (pSrc[pos_int+3] - pSrc[pos_int+1])));                            : (CrossfadeControllerValue < pDimRgn->Crossfade.out_end) ? float(pDimRgn->Crossfade.out_end - CrossfadeControllerValue) / float(pDimRgn->Crossfade.out_end - pDimRgn->Crossfade.out_start)
199                      #else // no filter                            : 0.0f;
200                          // left channel                  return pDimRgn->InvertAttenuationController ? 1 - att : att;
                         pOutputLeft[i]    += effective_volume * (pSrc[pos_int]   + pos_fract * (pSrc[pos_int+2] - pSrc[pos_int]));  
                         // right channel  
                         pOutputRight[i++] += effective_volume * (pSrc[pos_int+1] + pos_fract * (pSrc[pos_int+3] - pSrc[pos_int+1]));  
                     #endif // ENABLE_FILTER  
                 #else // polynomial interpolation  
                     // calculate left channel  
                     float xm1 = pSrc[pos_int];  
                     float x0  = pSrc[pos_int+2];  
                     float x1  = pSrc[pos_int+4];  
                     float x2  = pSrc[pos_int+6];  
                     float a   = (3.0f * (x0 - x1) - xm1 + x2) * 0.5f;  
                     float b   = 2.0f * x1 + xm1 - (5.0f * x0 + x2) * 0.5f;  
                     float c   = (x1 - xm1) * 0.5f;  
                     #if ENABLE_FILTER  
                         pOutputLeft[i] += this->FilterLeft.Apply(&bq_base, &bq_main, effective_volume * ((((a * pos_fract) + b) * pos_fract + c) * pos_fract + x0));  
                     #else // no filter  
                         pOutputLeft[i] += effective_volume * ((((a * pos_fract) + b) * pos_fract + c) * pos_fract + x0);  
                     #endif // ENABLE_FILTER  
   
                     //calculate right channel  
                     xm1 = pSrc[pos_int+1];  
                     x0  = pSrc[pos_int+3];  
                     x1  = pSrc[pos_int+5];  
                     x2  = pSrc[pos_int+7];  
                     a   = (3.0f * (x0 - x1) - xm1 + x2) * 0.5f;  
                     b   = 2.0f * x1 + xm1 - (5.0f * x0 + x2) * 0.5f;  
                     c   = (x1 - xm1) * 0.5f;  
                     #if ENABLE_FILTER  
                         pOutputRight[i++] += this->FilterRight.Apply(&bq_base, &bq_main, effective_volume * ((((a * pos_fract) + b) * pos_fract + c) * pos_fract + x0));  
                     #else // no filter  
                         pOutputRight[i++] += effective_volume * ((((a * pos_fract) + b) * pos_fract + c) * pos_fract + x0);  
                     #endif // ENABLE_FILTER  
                 #endif // USE_LINEAR_INTERPOLATION  
   
                 this->Pos += pitch;  
             }  
   
             inline void InterpolateOneStep_Mono(sample_t* pSrc, int& i, float& effective_volume, float& pitch,  biquad_param_t& bq_base, biquad_param_t& bq_main) {  
                 int   pos_int   = RTMath::DoubleToInt(this->Pos);  // integer position  
                 float pos_fract = this->Pos - pos_int;             // fractional part of position  
   
                 #if USE_LINEAR_INTERPOLATION  
                     float sample_point  = effective_volume * (pSrc[pos_int] + pos_fract * (pSrc[pos_int+1] - pSrc[pos_int]));  
                 #else // polynomial interpolation  
                     float xm1 = pSrc[pos_int];  
                     float x0  = pSrc[pos_int+1];  
                     float x1  = pSrc[pos_int+2];  
                     float x2  = pSrc[pos_int+3];  
                     float a   = (3.0f * (x0 - x1) - xm1 + x2) * 0.5f;  
                     float b   = 2.0f * x1 + xm1 - (5.0f * x0 + x2) * 0.5f;  
                     float c   = (x1 - xm1) * 0.5f;  
                     float sample_point = effective_volume * ((((a * pos_fract) + b) * pos_fract + c) * pos_fract + x0);  
                 #endif // USE_LINEAR_INTERPOLATION  
   
                 #if ENABLE_FILTER  
                     sample_point = this->FilterLeft.Apply(&bq_base, &bq_main, sample_point);  
                 #endif // ENABLE_FILTER  
   
                 pOutputLeft[i]    += sample_point;  
                 pOutputRight[i++] += sample_point;  
   
                 this->Pos += pitch;  
201              }              }
202    
203              inline float Constrain(float ValueToCheck, float Min, float Max) {              inline float Constrain(float ValueToCheck, float Min, float Max) {
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