/[svn]/linuxsampler/trunk/src/engines/gig/Voice.h
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revision 287 by schoenebeck, Sat Oct 16 17:38:03 2004 UTC revision 348 by schoenebeck, Sun Jan 23 21:24:16 2005 UTC
# Line 43  Line 43 
43  #include "Filter.h"  #include "Filter.h"
44  #include "../common/LFO.h"  #include "../common/LFO.h"
45    
 #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  
46  #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 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)
47  #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
48  #define FILTER_CUTOFF_MAX               10000.0f ///< maximum cutoff frequency (10kHz)  #define FILTER_CUTOFF_MAX               10000.0f ///< maximum cutoff frequency (10kHz)
# Line 104  namespace LinuxSampler { namespace gig { Line 102  namespace LinuxSampler { namespace gig {
102              void SetEngine(Engine* pEngine);              void SetEngine(Engine* pEngine);
103              int  Trigger(Pool<Event>::Iterator& itNoteOnEvent, int PitchBend, ::gig::Instrument* pInstrument, int iLayer, bool ReleaseTriggerVoice, bool VoiceStealing);              int  Trigger(Pool<Event>::Iterator& itNoteOnEvent, int PitchBend, ::gig::Instrument* pInstrument, int iLayer, bool ReleaseTriggerVoice, bool VoiceStealing);
104              inline bool IsActive() { return PlaybackState; }              inline bool IsActive() { return PlaybackState; }
105          private:          //private:
106              // Types              // Types
107              enum playback_state_t {              enum playback_state_t {
108                  playback_state_end  = 0,                  playback_state_end  = 0,
# Line 119  namespace LinuxSampler { namespace gig { Line 117  namespace LinuxSampler { namespace gig {
117              float                       PanRight;              float                       PanRight;
118              float                       CrossfadeVolume;    ///< Current attenuation level caused by a crossfade (only if a crossfade is defined of course)              float                       CrossfadeVolume;    ///< Current attenuation level caused by a crossfade (only if a crossfade is defined of course)
119              double                      Pos;                ///< Current playback position in sample              double                      Pos;                ///< Current playback position in sample
120              double                      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
121              double                      PitchBend;          ///< Current pitch value of the pitchbend wheel              float                       PitchBend;          ///< Current pitch value of the pitchbend wheel
122              ::gig::Sample*              pSample;            ///< Pointer to the sample to be played back              ::gig::Sample*              pSample;            ///< Pointer to the sample to be played back
123              ::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
124              ::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
125              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
126              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
127              Stream::reference_t         DiskStreamRef;      ///< Reference / link to the disk stream              Stream::reference_t         DiskStreamRef;      ///< Reference / link to the disk stream
128                int                         RealSampleWordsLeftToRead; ///< Number of samples left to read, not including the silence added for the interpolator
129              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.
130              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
131              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
132              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
133              EGADSR*                     pEG1;               ///< Envelope Generator 1 (Amplification)              EGADSR*                     pEG1;               ///< Envelope Generator 1 (Amplification)
134              EGADSR*                     pEG2;               ///< Envelope Generator 2 (Filter cutoff frequency)              EGADSR*                     pEG2;               ///< Envelope Generator 2 (Filter cutoff frequency)
# Line 148  namespace LinuxSampler { namespace gig { Line 147  namespace LinuxSampler { namespace gig {
147              LFO<gig::VCFCManipulator>*  pLFO2;             ///< Low Frequency Oscillator 2 (Filter cutoff frequency)              LFO<gig::VCFCManipulator>*  pLFO2;             ///< Low Frequency Oscillator 2 (Filter cutoff frequency)
148              LFO<gig::VCOManipulator>*   pLFO3;              ///< Low Frequency Oscillator 3 (Pitch)              LFO<gig::VCOManipulator>*   pLFO3;              ///< Low Frequency Oscillator 3 (Pitch)
149              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).
150          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
151              Pool<Event>::Iterator       itKillEvent;         ///< Event which caused this voice to be killed              Pool<Event>::Iterator       itKillEvent;         ///< Event which caused this voice to be killed
152          private:          //private:
153                int                         SynthesisMode;
154    
155              // Static Methods              // Static Methods
156              static float CalculateFilterCutoffCoeff();              static float CalculateFilterCutoffCoeff();
157              static int   CalculateFilterUpdateMask();              static int   CalculateFilterUpdateMask();
158    
159              // Methods              // Methods
160              void        KillImmediately();              void KillImmediately();
161              void        ProcessEvents(uint Samples);              void ProcessEvents(uint Samples);
162              #if ENABLE_FILTER              void CalculateBiquadParameters(uint Samples);
163              void        CalculateBiquadParameters(uint Samples);              void Synthesize(uint Samples, sample_t* pSrc, uint Skip);
             #endif // ENABLE_FILTER  
             void        InterpolateNoLoop(uint Samples, sample_t* pSrc, uint Skip);  
             void        InterpolateAndLoop(uint Samples, sample_t* pSrc, uint Skip);  
   
             inline void InterpolateMono(sample_t* pSrc, int& i) {  
                 InterpolateOneStep_Mono(pSrc, i,  
                                         pEngine->pSynthesisParameters[Event::destination_vca][i] * PanLeft,  
                                         pEngine->pSynthesisParameters[Event::destination_vca][i] * PanRight,  
                                         pEngine->pSynthesisParameters[Event::destination_vco][i],  
                                         pEngine->pBasicFilterParameters[i],  
                                         pEngine->pMainFilterParameters[i]);  
             }  
   
             inline void InterpolateStereo(sample_t* pSrc, int& i) {  
                 InterpolateOneStep_Stereo(pSrc, i,  
                                           pEngine->pSynthesisParameters[Event::destination_vca][i] * PanLeft,  
                                           pEngine->pSynthesisParameters[Event::destination_vca][i] * PanRight,  
                                           pEngine->pSynthesisParameters[Event::destination_vco][i],  
                                           pEngine->pBasicFilterParameters[i],  
                                           pEngine->pMainFilterParameters[i]);  
             }  
   
             inline void InterpolateOneStep_Stereo(sample_t* pSrc, int& i, float volume_left, float volume_right, 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  
                 pos_int <<= 1;  
   
                 #if USE_LINEAR_INTERPOLATION  
                     #if ENABLE_FILTER  
                         // left channel  
                         pEngine->pOutputLeft[i]    += this->FilterLeft.Apply(&bq_base, &bq_main, volume_left * (pSrc[pos_int]   + pos_fract * (pSrc[pos_int+2] - pSrc[pos_int])));  
                         // right channel  
                         pEngine->pOutputRight[i++] += this->FilterRight.Apply(&bq_base, &bq_main, volume_right * (pSrc[pos_int+1] + pos_fract * (pSrc[pos_int+3] - pSrc[pos_int+1])));  
                     #else // no filter  
                         // left channel  
                         pEngine->pOutputLeft[i]    += volume_left * (pSrc[pos_int]   + pos_fract * (pSrc[pos_int+2] - pSrc[pos_int]));  
                         // right channel  
                         pEngine->pOutputRight[i++] += volume_right * (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  
                         pEngine->pOutputLeft[i] += this->FilterLeft.Apply(&bq_base, &bq_main, volume_left * ((((a * pos_fract) + b) * pos_fract + c) * pos_fract + x0));  
                     #else // no filter  
                         pEngine->pOutputLeft[i] += volume_left * ((((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  
                         pEngine->pOutputRight[i++] += this->FilterRight.Apply(&bq_base, &bq_main, volume_right * ((((a * pos_fract) + b) * pos_fract + c) * pos_fract + x0));  
                     #else // no filter  
                         pEngine->pOutputRight[i++] += volume_right * ((((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 volume_left, float volume_right, 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  = 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 =  (((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  
   
                 pEngine->pOutputLeft[i]    += sample_point * volume_left;  
                 pEngine->pOutputRight[i++] += sample_point * volume_right;  
   
                 this->Pos += pitch;  
             }  
164    
165              inline float CrossfadeAttenuation(uint8_t& CrossfadeControllerValue) {              inline float CrossfadeAttenuation(uint8_t& CrossfadeControllerValue) {
166                  return (CrossfadeControllerValue <= pDimRgn->Crossfade.in_start)  ? 0.0f                  float att = (!pDimRgn->Crossfade.out_end) ? CrossfadeControllerValue / 127.0f /* 0,0,0,0 means no crossfade defined */
167                       : (CrossfadeControllerValue < pDimRgn->Crossfade.in_end)     ? float(CrossfadeControllerValue - pDimRgn->Crossfade.in_start) / float(pDimRgn->Crossfade.in_end - pDimRgn->Crossfade.in_start)                            : (CrossfadeControllerValue < pDimRgn->Crossfade.in_end) ?
168                       : (CrossfadeControllerValue <= pDimRgn->Crossfade.out_start) ? 1.0f                                  ((CrossfadeControllerValue <= pDimRgn->Crossfade.in_start) ? 0.0f
169                       : (CrossfadeControllerValue < pDimRgn->Crossfade.out_end)    ? float(CrossfadeControllerValue - pDimRgn->Crossfade.out_start) / float(pDimRgn->Crossfade.out_end - pDimRgn->Crossfade.out_start)                                  : float(CrossfadeControllerValue - pDimRgn->Crossfade.in_start) / float(pDimRgn->Crossfade.in_end - pDimRgn->Crossfade.in_start))
170                       : 0.0f;                            : (CrossfadeControllerValue <= pDimRgn->Crossfade.out_start) ? 1.0f
171                              : (CrossfadeControllerValue < pDimRgn->Crossfade.out_end) ? float(pDimRgn->Crossfade.out_end - CrossfadeControllerValue) / float(pDimRgn->Crossfade.out_end - pDimRgn->Crossfade.out_start)
172                              : 0.0f;
173                    return pDimRgn->InvertAttenuationController ? 1 - att : att;
174              }              }
175    
176              inline float Constrain(float ValueToCheck, float Min, float Max) {              inline float Constrain(float ValueToCheck, float Min, float Max) {
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