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

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revision 1857 by schoenebeck, Sat Mar 7 19:23:10 2009 UTC revision 1895 by persson, Sun May 3 12:15:40 2009 UTC
# Line 156  namespace LinuxSampler { namespace gig { Line 156  namespace LinuxSampler { namespace gig {
156          const DLS::sample_loop_t& loopinfo = pDimRgn->pSampleLoops[0];          const DLS::sample_loop_t& loopinfo = pDimRgn->pSampleLoops[0];
157    
158          if (DiskVoice) { // voice to be streamed from disk          if (DiskVoice) { // voice to be streamed from disk
159              MaxRAMPos = cachedsamples - (pEngine->MaxSamplesPerCycle << CONFIG_MAX_PITCH) / pSample->Channels; //TODO: this calculation is too pessimistic and may better be moved to Render() method, so it calculates MaxRAMPos dependent to the current demand of sample points to be rendered (e.g. in case of JACK)              if (cachedsamples > (pEngine->MaxSamplesPerCycle << CONFIG_MAX_PITCH)) {
160                    MaxRAMPos = cachedsamples - (pEngine->MaxSamplesPerCycle << CONFIG_MAX_PITCH) / pSample->Channels; //TODO: this calculation is too pessimistic and may better be moved to Render() method, so it calculates MaxRAMPos dependent to the current demand of sample points to be rendered (e.g. in case of JACK)
161                } else {
162                    // The cache is too small to fit a max sample buffer.
163                    // Setting MaxRAMPos to 0 will probably cause a click
164                    // in the audio, but it's better than not handling
165                    // this case at all, which would have caused the
166                    // unsigned MaxRAMPos to be set to a negative number.
167                    MaxRAMPos = 0;
168                }
169    
170              // check if there's a loop defined which completely fits into the cached (RAM) part of the sample              // check if there's a loop defined which completely fits into the cached (RAM) part of the sample
171              RAMLoop = (pDimRgn->SampleLoops && (loopinfo.LoopStart + loopinfo.LoopLength) <= MaxRAMPos);              RAMLoop = (pDimRgn->SampleLoops && (loopinfo.LoopStart + loopinfo.LoopLength) <= MaxRAMPos);
# Line 183  namespace LinuxSampler { namespace gig { Line 192  namespace LinuxSampler { namespace gig {
192    
193          // calculate initial pitch value          // calculate initial pitch value
194          {          {
195              double pitchbasecents = pDimRgn->FineTune + (int) pEngine->ScaleTuning[MIDIKey % 12];              double pitchbasecents = pEngineChannel->pInstrument->FineTune + pDimRgn->FineTune + pEngine->ScaleTuning[MIDIKey % 12];
196    
197              // GSt behaviour: maximum transpose up is 40 semitones. If              // GSt behaviour: maximum transpose up is 40 semitones. If
198              // MIDI key is more than 40 semitones above unity note,              // MIDI key is more than 40 semitones above unity note,
199              // the transpose is not done.              // the transpose is not done.
200              if (pDimRgn->PitchTrack && (MIDIKey - (int) pDimRgn->UnityNote) < 40) pitchbasecents += (MIDIKey - (int) pDimRgn->UnityNote) * 100;              if (pDimRgn->PitchTrack && (MIDIKey - (int) pDimRgn->UnityNote) < 40) pitchbasecents += (MIDIKey - (int) pDimRgn->UnityNote) * 100;
201    
202              this->PitchBase = RTMath::CentsToFreqRatio(pitchbasecents) * (double(pSample->SamplesPerSecond) / double(pEngine->SampleRate));              this->PitchBase = RTMath::CentsToFreqRatioUnlimited(pitchbasecents) * (double(pSample->SamplesPerSecond) / double(pEngine->SampleRate));
203              this->PitchBend = RTMath::CentsToFreqRatio(((double) PitchBend / 8192.0) * 200.0); // pitchbend wheel +-2 semitones = 200 cents              this->PitchBend = RTMath::CentsToFreqRatio(PitchBend / 8192.0 * 100.0 * pEngineChannel->pInstrument->PitchbendRange);
204          }          }
205    
206          // the length of the decay and release curves are dependent on the velocity          // the length of the decay and release curves are dependent on the velocity
# Line 737  namespace LinuxSampler { namespace gig { Line 746  namespace LinuxSampler { namespace gig {
746      }      }
747    
748      void Voice::processPitchEvent(RTList<Event>::Iterator& itEvent) {      void Voice::processPitchEvent(RTList<Event>::Iterator& itEvent) {
749          const float pitch = RTMath::CentsToFreqRatio(((double) itEvent->Param.Pitch.Pitch / 8192.0) * 200.0); // +-two semitones = +-200 cents          PitchBend = RTMath::CentsToFreqRatio(itEvent->Param.Pitch.Pitch / 8192.0 * 100.0 * pEngineChannel->pInstrument->PitchbendRange);
         finalSynthesisParameters.fFinalPitch *= pitch;  
         PitchBend = pitch;  
750      }      }
751    
752      void Voice::processCutoffEvent(RTList<Event>::Iterator& itEvent) {      void Voice::processCutoffEvent(RTList<Event>::Iterator& itEvent) {
# Line 815  namespace LinuxSampler { namespace gig { Line 822  namespace LinuxSampler { namespace gig {
822              int iSubFragmentEnd = RTMath::Min(i + CONFIG_DEFAULT_SUBFRAGMENT_SIZE, Samples);              int iSubFragmentEnd = RTMath::Min(i + CONFIG_DEFAULT_SUBFRAGMENT_SIZE, Samples);
823    
824              // initialize all final synthesis parameters              // initialize all final synthesis parameters
             finalSynthesisParameters.fFinalPitch = PitchBase * PitchBend;  
825              fFinalCutoff    = VCFCutoffCtrl.fvalue;              fFinalCutoff    = VCFCutoffCtrl.fvalue;
826              fFinalResonance = VCFResonanceCtrl.fvalue;              fFinalResonance = VCFResonanceCtrl.fvalue;
827    
828              // process MIDI control change and pitchbend events for this subfragment              // process MIDI control change and pitchbend events for this subfragment
829              processCCEvents(itCCEvent, iSubFragmentEnd);              processCCEvents(itCCEvent, iSubFragmentEnd);
830    
831                finalSynthesisParameters.fFinalPitch = PitchBase * PitchBend;
832              float fFinalVolume = VolumeSmoother.render() * CrossfadeSmoother.render();              float fFinalVolume = VolumeSmoother.render() * CrossfadeSmoother.render();
833  #ifdef CONFIG_PROCESS_MUTED_CHANNELS  #ifdef CONFIG_PROCESS_MUTED_CHANNELS
834              if (pEngineChannel->GetMute()) fFinalVolume = 0;              if (pEngineChannel->GetMute()) fFinalVolume = 0;
# Line 869  namespace LinuxSampler { namespace gig { Line 876  namespace LinuxSampler { namespace gig {
876              if (bLFO2Enabled) fFinalCutoff *= pLFO2->render();              if (bLFO2Enabled) fFinalCutoff *= pLFO2->render();
877              if (bLFO3Enabled) finalSynthesisParameters.fFinalPitch *= RTMath::CentsToFreqRatio(pLFO3->render());              if (bLFO3Enabled) finalSynthesisParameters.fFinalPitch *= RTMath::CentsToFreqRatio(pLFO3->render());
878    
879                // limit the pitch so we don't read outside the buffer
880                finalSynthesisParameters.fFinalPitch = RTMath::Min(finalSynthesisParameters.fFinalPitch, float(1 << CONFIG_MAX_PITCH));
881    
882              // if filter enabled then update filter coefficients              // if filter enabled then update filter coefficients
883              if (SYNTHESIS_MODE_GET_FILTER(SynthesisMode)) {              if (SYNTHESIS_MODE_GET_FILTER(SynthesisMode)) {
884                  finalSynthesisParameters.filterLeft.SetParameters(fFinalCutoff, fFinalResonance, pEngine->SampleRate);                  finalSynthesisParameters.filterLeft.SetParameters(fFinalCutoff, fFinalResonance, pEngine->SampleRate);
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