/[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 319 by schoenebeck, Mon Dec 13 00:46:42 2004 UTC revision 325 by senkov, Tue Dec 21 04:54:37 2004 UTC
# Line 61  namespace LinuxSampler { namespace gig { Line 61  namespace LinuxSampler { namespace gig {
61    
62          // select synthesis implementation (currently either pure C++ or MMX+SSE(1))          // select synthesis implementation (currently either pure C++ or MMX+SSE(1))
63          SYNTHESIS_MODE_SET_IMPLEMENTATION(SynthesisMode, Features::supportsMMX() && Features::supportsSSE());          SYNTHESIS_MODE_SET_IMPLEMENTATION(SynthesisMode, Features::supportsMMX() && Features::supportsSSE());
64            SYNTHESIS_MODE_SET_PROFILING(SynthesisMode, true);
65      }      }
66    
67      Voice::~Voice() {      Voice::~Voice() {
# Line 695  namespace LinuxSampler { namespace gig { Line 696  namespace LinuxSampler { namespace gig {
696                          Pos -= int(Pos);                          Pos -= int(Pos);
697                      }                      }
698    
699                        const int sampleWordsLeftToRead = DiskStreamRef.pStream->GetReadSpace();
700    
701                      // add silence sample at the end if we reached the end of the stream (for the interpolator)                      // add silence sample at the end if we reached the end of the stream (for the interpolator)
702                      if (DiskStreamRef.State == Stream::state_end && DiskStreamRef.pStream->GetReadSpace() < (pEngine->MaxSamplesPerCycle << MAX_PITCH) / pSample->Channels) {                      if (DiskStreamRef.State == Stream::state_end) {
703                          DiskStreamRef.pStream->WriteSilence((pEngine->MaxSamplesPerCycle << MAX_PITCH) / pSample->Channels);                          const int maxSampleWordsPerCycle = (pEngine->MaxSamplesPerCycle << MAX_PITCH) * pSample->Channels + 6; // +6 for the interpolator algorithm
704                          this->PlaybackState = playback_state_end;                          if (sampleWordsLeftToRead <= maxSampleWordsPerCycle) {
705                                DiskStreamRef.pStream->WriteSilence(maxSampleWordsPerCycle - sampleWordsLeftToRead);
706                            }
707                      }                      }
708    
709                      sample_t* ptr = DiskStreamRef.pStream->GetReadPtr(); // get the current read_ptr within the ringbuffer where we read the samples from                      sample_t* ptr = DiskStreamRef.pStream->GetReadPtr(); // get the current read_ptr within the ringbuffer where we read the samples from
# Line 706  namespace LinuxSampler { namespace gig { Line 711  namespace LinuxSampler { namespace gig {
711                      // render current audio fragment                      // render current audio fragment
712                      Synthesize(Samples, ptr, Delay);                      Synthesize(Samples, ptr, Delay);
713    
714                      DiskStreamRef.pStream->IncrementReadPos(int(Pos) * pSample->Channels);                      const int iPos = (int) Pos;
715                      Pos -= int(Pos);                      const int readSampleWords = iPos * pSample->Channels; // amount of sample words actually been read
716                        DiskStreamRef.pStream->IncrementReadPos(readSampleWords);
717                        Pos -= iPos; // just keep fractional part of Pos
718    
719                        // change state of voice to 'end' if we really reached the end of the sample data
720                        if (DiskStreamRef.State == Stream::state_end && readSampleWords >= sampleWordsLeftToRead) this->PlaybackState = playback_state_end;
721                  }                  }
722                  break;                  break;
723    
# Line 926  namespace LinuxSampler { namespace gig { Line 936  namespace LinuxSampler { namespace gig {
936          float prev_cutoff = pEngine->pSynthesisParameters[Event::destination_vcfc][0];          float prev_cutoff = pEngine->pSynthesisParameters[Event::destination_vcfc][0];
937          float prev_res    = pEngine->pSynthesisParameters[Event::destination_vcfr][0];          float prev_res    = pEngine->pSynthesisParameters[Event::destination_vcfr][0];
938          FilterLeft.SetParameters(&bqbase, &bqmain, prev_cutoff, prev_res, pEngine->SampleRate);          FilterLeft.SetParameters(&bqbase, &bqmain, prev_cutoff, prev_res, pEngine->SampleRate);
939            FilterRight.SetParameters(&bqbase, &bqmain, prev_cutoff, prev_res, pEngine->SampleRate);
940          pEngine->pBasicFilterParameters[0] = bqbase;          pEngine->pBasicFilterParameters[0] = bqbase;
941          pEngine->pMainFilterParameters[0]  = bqmain;          pEngine->pMainFilterParameters[0]  = bqmain;
942    
# Line 939  namespace LinuxSampler { namespace gig { Line 950  namespace LinuxSampler { namespace gig {
950                      prev_cutoff = pEngine->pSynthesisParameters[Event::destination_vcfc][i];                      prev_cutoff = pEngine->pSynthesisParameters[Event::destination_vcfc][i];
951                      prev_res    = pEngine->pSynthesisParameters[Event::destination_vcfr][i];                      prev_res    = pEngine->pSynthesisParameters[Event::destination_vcfr][i];
952                      FilterLeft.SetParameters(&bqbase, &bqmain, prev_cutoff, prev_res, pEngine->SampleRate);                      FilterLeft.SetParameters(&bqbase, &bqmain, prev_cutoff, prev_res, pEngine->SampleRate);
953                        FilterRight.SetParameters(&bqbase, &bqmain, prev_cutoff, prev_res, pEngine->SampleRate);
954                  }                  }
955              }              }
956    
957              //same as 'pEngine->pBasicFilterParameters[i] = bqbase;'              //same as 'pEngine->pBasicFilterParameters[i] = bqbase;'
958              bq    = (float*) &pEngine->pBasicFilterParameters[i];              bq    = (float*) &pEngine->pBasicFilterParameters[i];
959              bq[0] = bqbase.a1;              bq[0] = bqbase.b0;
960              bq[1] = bqbase.a2;              bq[1] = bqbase.b1;
961              bq[2] = bqbase.b0;              bq[2] = bqbase.b2;
962              bq[3] = bqbase.b1;              bq[3] = bqbase.a1;
963              bq[4] = bqbase.b2;              bq[4] = bqbase.a2;
964    
965              // same as 'pEngine->pMainFilterParameters[i] = bqmain;'              // same as 'pEngine->pMainFilterParameters[i] = bqmain;'
966              bq    = (float*) &pEngine->pMainFilterParameters[i];              bq    = (float*) &pEngine->pMainFilterParameters[i];
967              bq[0] = bqmain.a1;              bq[0] = bqmain.b0;
968              bq[1] = bqmain.a2;              bq[1] = bqmain.b1;
969              bq[2] = bqmain.b0;              bq[2] = bqmain.b2;
970              bq[3] = bqmain.b1;              bq[3] = bqmain.a1;
971              bq[4] = bqmain.b2;              bq[4] = bqmain.a2;
972          }          }
973      }      }
974    
# Line 968  namespace LinuxSampler { namespace gig { Line 980  namespace LinuxSampler { namespace gig {
980       *  @param pSrc    - pointer to input sample data       *  @param pSrc    - pointer to input sample data
981       *  @param Skip    - number of sample points to skip in output buffer       *  @param Skip    - number of sample points to skip in output buffer
982       */       */
983      void Voice::Synthesize(uint Samples, sample_t* pSrc, int Skip) {      void Voice::Synthesize(uint Samples, sample_t* pSrc, uint Skip) {
984          UpdateSynthesisMode();          RunSynthesisFunction(SynthesisMode, *this, Samples, pSrc, Skip);
         SynthesizeFragment_Fn* f = (SynthesizeFragment_Fn*) SynthesizeFragmentFnPtr;  
         f(*this, Samples, pSrc, Skip);  
     }  
   
     /**  
      *  Determine the respective synthesis function for the given synthesis  
      *  mode.  
      */  
     void Voice::UpdateSynthesisMode() {  
         SynthesizeFragmentFnPtr = GetSynthesisFunction(SynthesisMode);  
985      }      }
986    
987      /**      /**
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