/[svn]/linuxsampler/trunk/src/engines/gig/Voice.h
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Diff of /linuxsampler/trunk/src/engines/gig/Voice.h

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revision 53 by schoenebeck, Mon Apr 26 17:15:51 2004 UTC revision 239 by schoenebeck, Sun Sep 12 14:48:19 2004 UTC
# Line 2  Line 2 
2   *                                                                         *   *                                                                         *
3   *   LinuxSampler - modular, streaming capable sampler                     *   *   LinuxSampler - modular, streaming capable sampler                     *
4   *                                                                         *   *                                                                         *
5   *   Copyright (C) 2003 by Benno Senoner and Christian Schoenebeck         *   *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *
6   *                                                                         *   *                                                                         *
7   *   This program is free software; you can redistribute it and/or modify  *   *   This program is free software; you can redistribute it and/or modify  *
8   *   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 32  Line 32 
32  #include "../../common/RTMath.h"  #include "../../common/RTMath.h"
33  #include "../../common/RingBuffer.h"  #include "../../common/RingBuffer.h"
34  #include "../../common/RTELMemoryPool.h"  #include "../../common/RTELMemoryPool.h"
35  #include "../../audiodriver/AudioOutputDevice.h"  #include "../../drivers/audio/AudioOutputDevice.h"
36  #include "../../lib/fileloader/libgig/gig.h"  #include "../../lib/fileloader/libgig/gig.h"
37    #include "../common/BiquadFilter.h"
38  #include "Engine.h"  #include "Engine.h"
39  #include "Stream.h"  #include "Stream.h"
40  #include "DiskThread.h"  #include "DiskThread.h"
# Line 42  Line 43 
43  #include "Filter.h"  #include "Filter.h"
44  #include "../common/LFO.h"  #include "../common/LFO.h"
45    
46  #define USE_LINEAR_INTERPOLATION        1  ///< set to 0 if you prefer cubic interpolation (slower, better quality)  #define USE_LINEAR_INTERPOLATION        0  ///< set to 0 if you prefer cubic interpolation (slower, better quality)
47  #define ENABLE_FILTER                   0  ///< if set to 0 then filter (VCF) code is ignored on compile time  #define ENABLE_FILTER                   1  ///< if set to 0 then filter (VCF) code is ignored on compile time
48  #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)  #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)
49  #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 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
50  #define FILTER_CUTOFF_MAX               10000.0f ///< maximum cutoff frequency (10kHz)  #define FILTER_CUTOFF_MAX               10000.0f ///< maximum cutoff frequency (10kHz)
51  #define FILTER_CUTOFF_MIN               100.0f   ///< minimum cutoff frequency (100Hz)  #define FILTER_CUTOFF_MIN               100.0f   ///< minimum cutoff frequency (100Hz)
# Line 81  namespace LinuxSampler { namespace gig { Line 82  namespace LinuxSampler { namespace gig {
82          public:          public:
83              // Attributes              // Attributes
84              int          MIDIKey;      ///< MIDI key number of the key that triggered the voice              int          MIDIKey;      ///< MIDI key number of the key that triggered the voice
85                uint         KeyGroup;
86              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
87    
88              // Methods              // Methods
89              Voice();              Voice();
90             ~Voice();             ~Voice();
91              void Kill();              void Kill(Event* pKillEvent);
92                void KillImmediately();
93              void Render(uint Samples);              void Render(uint Samples);
94              void Reset();              void Reset();
95              void SetOutput(AudioOutputDevice* pAudioOutputDevice);              void SetOutput(AudioOutputDevice* pAudioOutputDevice);
96              void SetEngine(Engine* pEngine);              void SetEngine(Engine* pEngine);
97              int  Trigger(Event* pNoteOnEvent, int PitchBend, ::gig::Instrument* pInstrument);              int  Trigger(Event* pNoteOnEvent, int PitchBend, ::gig::Instrument* pInstrument, int iLayer = 0);
98              inline bool IsActive() { return Active; }              inline bool IsActive() { return Active; }
99          private:          private:
100              // Types              // Types
# Line 104  namespace LinuxSampler { namespace gig { Line 107  namespace LinuxSampler { namespace gig {
107              // Attributes              // Attributes
108              gig::Engine*                pEngine;            ///< Pointer to the sampler engine, to be able to access the event lists.              gig::Engine*                pEngine;            ///< Pointer to the sampler engine, to be able to access the event lists.
109              float                       Volume;             ///< Volume level of the voice              float                       Volume;             ///< Volume level of the voice
110              float*                      pOutputLeft;        ///< Audio output channel buffer (left)              float                       CrossfadeVolume;    ///< Current attenuation level caused by a crossfade (only if a crossfade is defined of course)
             float*                      pOutputRight;       ///< Audio output channel buffer (right)  
             uint                        SampleRate;         ///< Sample rate of the engines output audio signal (in Hz)  
             uint                        MaxSamplesPerCycle; ///< Size of each audio output buffer  
111              double                      Pos;                ///< Current playback position in sample              double                      Pos;                ///< Current playback position in sample
112              double                      PitchBase;          ///< Basic pitch depth, stays the same for the whole life time of the voice              double                      PitchBase;          ///< Basic pitch depth, stays the same for the whole life time of the voice
113              double                      PitchBend;          ///< Current pitch value of the pitchbend wheel              double                      PitchBend;          ///< Current pitch value of the pitchbend wheel
114              ::gig::Sample*              pSample;            ///< Pointer to the sample to be played back              ::gig::Sample*              pSample;            ///< Pointer to the sample to be played back
115              ::gig::Region*              pRegion;            ///< Pointer to the articulation information of the respective keyboard region of this voice              ::gig::Region*              pRegion;            ///< Pointer to the articulation information of the respective keyboard region of this voice
116                ::gig::DimensionRegion*     pDimRgn;            ///< Pointer to the articulation information of current dimension region of this voice
117              bool                        Active;             ///< If this voice object is currently in usage              bool                        Active;             ///< If this voice object is currently in usage
118              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
119              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 130  namespace LinuxSampler { namespace gig { Line 131  namespace LinuxSampler { namespace gig {
131              midi_ctrl                   VCFResonanceCtrl;              midi_ctrl                   VCFResonanceCtrl;
132              int                         FilterUpdateCounter; ///< Used to update filter parameters all FILTER_UPDATE_PERIOD samples              int                         FilterUpdateCounter; ///< Used to update filter parameters all FILTER_UPDATE_PERIOD samples
133              static const float          FILTER_CUTOFF_COEFF;              static const float          FILTER_CUTOFF_COEFF;
134                static const int            FILTER_UPDATE_MASK;
135              VCAManipulator*             pVCAManipulator;              VCAManipulator*             pVCAManipulator;
136              VCFCManipulator*            pVCFCManipulator;              VCFCManipulator*            pVCFCManipulator;
137              VCOManipulator*             pVCOManipulator;              VCOManipulator*             pVCOManipulator;
# Line 137  namespace LinuxSampler { namespace gig { Line 139  namespace LinuxSampler { namespace gig {
139              LFO<gig::VCFCManipulator>*  pLFO2;             ///< Low Frequency Oscillator 2 (Filter cutoff frequency)              LFO<gig::VCFCManipulator>*  pLFO2;             ///< Low Frequency Oscillator 2 (Filter cutoff frequency)
140              LFO<gig::VCOManipulator>*   pLFO3;              ///< Low Frequency Oscillator 3 (Pitch)              LFO<gig::VCOManipulator>*   pLFO3;              ///< Low Frequency Oscillator 3 (Pitch)
141              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).              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).
142                Event*                      pKillEvent;         ///< Event which caused this voice to be killed
143    
144              // Static Methods              // Static Methods
145              static float CalculateFilterCutoffCoeff();              static float CalculateFilterCutoffCoeff();
146                static int   CalculateFilterUpdateMask();
147    
148              // Methods              // Methods
149              void        ProcessEvents(uint Samples);              void        ProcessEvents(uint Samples);
150                #if ENABLE_FILTER
151                void        CalculateBiquadParameters(uint Samples);
152                #endif // ENABLE_FILTER
153              void        Interpolate(uint Samples, sample_t* pSrc, uint Skip);              void        Interpolate(uint Samples, sample_t* pSrc, uint Skip);
154              void        InterpolateAndLoop(uint Samples, sample_t* pSrc, uint Skip);              void        InterpolateAndLoop(uint Samples, sample_t* pSrc, uint Skip);
155              inline void InterpolateOneStep_Stereo(sample_t* pSrc, int& i, float& effective_volume, float& pitch, float& cutoff, float& resonance) {              inline void InterpolateOneStep_Stereo(sample_t* pSrc, int& i, float& effective_volume, float& pitch, biquad_param_t& bq_base, biquad_param_t& bq_main) {
156                  int   pos_int   = RTMath::DoubleToInt(this->Pos);  // integer position                  int   pos_int   = RTMath::DoubleToInt(this->Pos);  // integer position
157                  float pos_fract = this->Pos - pos_int;             // fractional part of position                  float pos_fract = this->Pos - pos_int;             // fractional part of position
158                  pos_int <<= 1;                  pos_int <<= 1;
159    
                 #if ENABLE_FILTER  
                     UpdateFilter_Stereo(cutoff + FILTER_CUTOFF_MIN, resonance);  
                 #endif // ENABLE_FILTER  
   
160                  #if USE_LINEAR_INTERPOLATION                  #if USE_LINEAR_INTERPOLATION
161                      #if ENABLE_FILTER                      #if ENABLE_FILTER
162                          // left channel                          // left channel
163                          pOutputLeft[i]    += this->FilterLeft.Apply(effective_volume * (pSrc[pos_int]   + pos_fract * (pSrc[pos_int+2] - pSrc[pos_int])));                          pEngine->pOutputLeft[i]    += this->FilterLeft.Apply(&bq_base, &bq_main, effective_volume * (pSrc[pos_int]   + pos_fract * (pSrc[pos_int+2] - pSrc[pos_int])));
164                          // right channel                          // right channel
165                          pOutputRight[i++] += this->FilterRight.Apply(effective_volume * (pSrc[pos_int+1] + pos_fract * (pSrc[pos_int+3] - pSrc[pos_int+1])));                          pEngine->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])));
166                      #else // no filter                      #else // no filter
167                          // left channel                          // left channel
168                          pOutputLeft[i]    += effective_volume * (pSrc[pos_int]   + pos_fract * (pSrc[pos_int+2] - pSrc[pos_int]));                          pEngine->pOutputLeft[i]    += effective_volume * (pSrc[pos_int]   + pos_fract * (pSrc[pos_int+2] - pSrc[pos_int]));
169                          // right channel                          // right channel
170                          pOutputRight[i++] += effective_volume * (pSrc[pos_int+1] + pos_fract * (pSrc[pos_int+3] - pSrc[pos_int+1]));                          pEngine->pOutputRight[i++] += effective_volume * (pSrc[pos_int+1] + pos_fract * (pSrc[pos_int+3] - pSrc[pos_int+1]));
171                      #endif // ENABLE_FILTER                      #endif // ENABLE_FILTER
172                  #else // polynomial interpolation                  #else // polynomial interpolation
173                      // calculate left channel                      // calculate left channel
# Line 172  namespace LinuxSampler { namespace gig { Line 175  namespace LinuxSampler { namespace gig {
175                      float x0  = pSrc[pos_int+2];                      float x0  = pSrc[pos_int+2];
176                      float x1  = pSrc[pos_int+4];                      float x1  = pSrc[pos_int+4];
177                      float x2  = pSrc[pos_int+6];                      float x2  = pSrc[pos_int+6];
178                      float a   = (3 * (x0 - x1) - xm1 + x2) / 2;                      float a   = (3.0f * (x0 - x1) - xm1 + x2) * 0.5f;
179                      float b   = 2 * x1 + xm1 - (5 * x0 + x2) / 2;                      float b   = 2.0f * x1 + xm1 - (5.0f * x0 + x2) * 0.5f;
180                      float c   = (x1 - xm1) / 2;                      float c   = (x1 - xm1) * 0.5f;
181                      #if ENABLE_FILTER                      #if ENABLE_FILTER
182                          pOutputLeft[i] += this->FilterLeft.Apply(effective_volume * ((((a * pos_fract) + b) * pos_fract + c) * pos_fract + x0));                          pEngine->pOutputLeft[i] += this->FilterLeft.Apply(&bq_base, &bq_main, effective_volume * ((((a * pos_fract) + b) * pos_fract + c) * pos_fract + x0));
183                      #else // no filter                      #else // no filter
184                          pOutputRight[i] += effective_volume * ((((a * pos_fract) + b) * pos_fract + c) * pos_fract + x0);                          pEngine->pOutputLeft[i] += effective_volume * ((((a * pos_fract) + b) * pos_fract + c) * pos_fract + x0);
185                      #endif // ENABLE_FILTER                      #endif // ENABLE_FILTER
186    
187                      //calculate right channel                      //calculate right channel
# Line 186  namespace LinuxSampler { namespace gig { Line 189  namespace LinuxSampler { namespace gig {
189                      x0  = pSrc[pos_int+3];                      x0  = pSrc[pos_int+3];
190                      x1  = pSrc[pos_int+5];                      x1  = pSrc[pos_int+5];
191                      x2  = pSrc[pos_int+7];                      x2  = pSrc[pos_int+7];
192                      a   = (3 * (x0 - x1) - xm1 + x2) / 2;                      a   = (3.0f * (x0 - x1) - xm1 + x2) * 0.5f;
193                      b   = 2 * x1 + xm1 - (5 * x0 + x2) / 2;                      b   = 2.0f * x1 + xm1 - (5.0f * x0 + x2) * 0.5f;
194                      c   = (x1 - xm1) / 2;                      c   = (x1 - xm1) * 0.5f;
195                      #if ENABLE_FILTER                      #if ENABLE_FILTER
196                          pOutputLeft[i++] += this->FilterRight.Apply(effective_volume * ((((a * pos_fract) + b) * pos_fract + c) * pos_fract + x0));                          pEngine->pOutputRight[i++] += this->FilterRight.Apply(&bq_base, &bq_main, effective_volume * ((((a * pos_fract) + b) * pos_fract + c) * pos_fract + x0));
197                      #else // no filter                      #else // no filter
198                          pOutputRight[i++] += effective_volume * ((((a * pos_fract) + b) * pos_fract + c) * pos_fract + x0);                          pEngine->pOutputRight[i++] += effective_volume * ((((a * pos_fract) + b) * pos_fract + c) * pos_fract + x0);
199                      #endif // ENABLE_FILTER                      #endif // ENABLE_FILTER
200                  #endif // USE_LINEAR_INTERPOLATION                  #endif // USE_LINEAR_INTERPOLATION
201    
202                  this->Pos += pitch;                  this->Pos += pitch;
203              }              }
204              inline void InterpolateOneStep_Mono(sample_t* pSrc, int& i, float& effective_volume, float& pitch, float& cutoff, float& resonance) {  
205                inline void InterpolateOneStep_Mono(sample_t* pSrc, int& i, float& effective_volume, float& pitch,  biquad_param_t& bq_base, biquad_param_t& bq_main) {
206                  int   pos_int   = RTMath::DoubleToInt(this->Pos);  // integer position                  int   pos_int   = RTMath::DoubleToInt(this->Pos);  // integer position
207                  float pos_fract = this->Pos - pos_int;             // fractional part of position                  float pos_fract = this->Pos - pos_int;             // fractional part of position
208    
                 #if ENABLE_FILTER  
                     UpdateFilter_Mono(cutoff + FILTER_CUTOFF_MIN, resonance);  
                 #endif // ENABLE_FILTER  
   
209                  #if USE_LINEAR_INTERPOLATION                  #if USE_LINEAR_INTERPOLATION
210                      float sample_point  = effective_volume * (pSrc[pos_int] + pos_fract * (pSrc[pos_int+1] - pSrc[pos_int]));                      float sample_point  = effective_volume * (pSrc[pos_int] + pos_fract * (pSrc[pos_int+1] - pSrc[pos_int]));
211                  #else // polynomial interpolation                  #else // polynomial interpolation
# Line 213  namespace LinuxSampler { namespace gig { Line 213  namespace LinuxSampler { namespace gig {
213                      float x0  = pSrc[pos_int+1];                      float x0  = pSrc[pos_int+1];
214                      float x1  = pSrc[pos_int+2];                      float x1  = pSrc[pos_int+2];
215                      float x2  = pSrc[pos_int+3];                      float x2  = pSrc[pos_int+3];
216                      float a   = (3 * (x0 - x1) - xm1 + x2) / 2;                      float a   = (3.0f * (x0 - x1) - xm1 + x2) * 0.5f;
217                      float b   = 2 * x1 + xm1 - (5 * x0 + x2) / 2;                      float b   = 2.0f * x1 + xm1 - (5.0f * x0 + x2) * 0.5f;
218                      float c   = (x1 - xm1) / 2;                      float c   = (x1 - xm1) * 0.5f;
219                      float sample_point = effective_volume * ((((a * pos_fract) + b) * pos_fract + c) * pos_fract + x0);                      float sample_point = effective_volume * ((((a * pos_fract) + b) * pos_fract + c) * pos_fract + x0);
220                  #endif // USE_LINEAR_INTERPOLATION                  #endif // USE_LINEAR_INTERPOLATION
221    
222                  #if ENABLE_FILTER                  #if ENABLE_FILTER
223                      sample_point = this->FilterLeft.Apply(sample_point);                      sample_point = this->FilterLeft.Apply(&bq_base, &bq_main, sample_point);
224                  #endif // ENABLE_FILTER                  #endif // ENABLE_FILTER
225    
226                  pOutputLeft[i]    += sample_point;                  pEngine->pOutputLeft[i]    += sample_point;
227                  pOutputRight[i++] += sample_point;                  pEngine->pOutputRight[i++] += sample_point;
228    
229                  this->Pos += pitch;                  this->Pos += pitch;
230              }              }
231              inline void UpdateFilter_Stereo(float cutoff, float& resonance) {  
232                  if (!(++FilterUpdateCounter % FILTER_UPDATE_PERIOD) && (cutoff != FilterLeft.Cutoff() || resonance != FilterLeft.Resonance())) {              inline float CrossfadeAttenuation(uint8_t& CrossfadeControllerValue) {
233                      FilterLeft.SetParameters(cutoff, resonance, SampleRate);                  return (CrossfadeControllerValue <= pDimRgn->Crossfade.in_start)  ? 0.0f
234                      FilterRight.SetParameters(cutoff, resonance, SampleRate);                       : (CrossfadeControllerValue < pDimRgn->Crossfade.in_end)     ? float(CrossfadeControllerValue - pDimRgn->Crossfade.in_start) / float(pDimRgn->Crossfade.in_end - pDimRgn->Crossfade.in_start)
235                  }                       : (CrossfadeControllerValue <= pDimRgn->Crossfade.out_start) ? 1.0f
236              }                       : (CrossfadeControllerValue < pDimRgn->Crossfade.out_end)    ? float(CrossfadeControllerValue - pDimRgn->Crossfade.out_start) / float(pDimRgn->Crossfade.out_end - pDimRgn->Crossfade.out_start)
237              inline void UpdateFilter_Mono(float cutoff, float& resonance) {                       : 0.0f;
                 if (!(++FilterUpdateCounter % FILTER_UPDATE_PERIOD) && (cutoff != FilterLeft.Cutoff() || resonance != FilterLeft.Resonance())) {  
                     FilterLeft.SetParameters(cutoff, resonance, SampleRate);  
                 }  
238              }              }
239    
240              inline float Constrain(float ValueToCheck, float Min, float Max) {              inline float Constrain(float ValueToCheck, float Min, float Max) {
241                  if      (ValueToCheck > Max) ValueToCheck = Max;                  if      (ValueToCheck > Max) ValueToCheck = Max;
242                  else if (ValueToCheck < Min) ValueToCheck = Min;                  else if (ValueToCheck < Min) ValueToCheck = Min;
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