init()

void FLASHMEM AppCQT::init ( )

inlineprotected

Definition at line 86 of file appCQT.h.

                        {
      update_priority = 0; 
      osc_bank_size = OSC_BANK_SIZE;
      char buffer[32]; //used to build the stream names
      sprintf(name, "AppCQT"); //set the applications name
      if (ad == NULL || am== NULL) return;
      AudioNoInterrupts();
      for (int16_t i=0; i < osc_bank_size; i++){
        sprintf(buffer, "waveform:%d", i+1);
        //request the object from the audio director
        osc[i] = (erisAudioSynthWaveform*) (ad->getAudioStreamObjByName(buffer));
        //init the object to the default state
        if (osc[i]!=NULL) osc[i]->begin(0.0, 0, WAVEFORM_SINE);
      }
      AudioInterrupts();
      //take care to downcast fetched objects to the correct type!
      fft = (erisAudioAnalyzeFFT1024*) (ad->getAudioStreamObjByName("fft1024:1"));
      fft2 = (erisAudioAnalyzeFFT1024*) (ad->getAudioStreamObjByName("fft1024:2"));
      if(fft == NULL || fft2 == NULL) return;
      fft2->toggleActiveRange(); //switch to low range
      //zero out the data variables
      memset(&fftRVal,0,sizeof(FFTReadRange));
      memset(&oscBank,0,sizeof(FFTReadRange)* OSC_BANK_SIZE);
      //init the data dictionary value(s)
      am->data->create(OCTAVE_DOWN_INTERVAL,(int32_t)0);
      //init the QCT bins by loading the frequency ranges for each music note using a look up table
      float flow;
      float fhigh;
      high_range = CQT_HIGHRANGE_SPLIT_AT_BIN;
      for (uint16_t i=0;i < NOTE_ARRAY_LENGTH;i++){
        flow = 0;
        fhigh = 0;
        if (i > 0 && i < NOTE_ARRAY_LENGTH-1){
          //calculate the high and low frequencies for the given note
          //this is done by splitting the frequency differences from the music note above and below 
          flow = note_freq[i] - (note_freq[i] - note_freq[i-1])/2.0;
          fhigh = note_freq[i] + (note_freq[i+1] - note_freq[i])/2.0;
        }else{
          flow = 0;
          fhigh = 0;
        }
        //zero out the destination within the array
        memset(&fftHighRR[i],0,sizeof(FFTReadRange));
        memset(&fftLowRR[i],0,sizeof(FFTReadRange));
        //write the ranges to the bins, split between the high and low range fft
        if (i >= high_range){
          fftHighRR[i].cqtBin =i;
          fftLowRR[i].cqtBin =i;
          
          fftHighRR[i].startFrequency = flow;
          fftLowRR[i].startFrequency =0;
          
          fftHighRR[i].stopFrequency =fhigh;
          fftLowRR[i].stopFrequency =0;  
 
        }
        else{
          fftHighRR[i].cqtBin =i;
          fftLowRR[i].cqtBin =i;
          
          fftHighRR[i].startFrequency =0;
          fftLowRR[i].startFrequency =flow;
          
          fftHighRR[i].stopFrequency =0;
          fftLowRR[i].stopFrequency =fhigh;            
        }
       }
      
      rt_calls = 0;
      update_calls = 0;
      pll_p=0.0;
      pll_f=1.0;
      //enable the fft blocks
      fft_buffer_serial_transmit_elapsed = 0;
      fft_buffer_select_for_serial_transmit = 0;
      cqt_serial_transmit_elapsed = 0;
      is_active = true;
      am->data->create(FFT_AGE_THRESHOLD,(int32_t)6);
      AudioNoInterrupts();
      fft->enableFFT(true);
      fft2->enableFFT(true);
      AudioInterrupts();
    }; 

References AppBaseClass::ad, AppBaseClass::am, AudioSynthWaveformhd::begin(), cqt_serial_transmit_elapsed, SvcDataDictionary::create(), AppManager::data, erisAudioAnalyzeFFT1024::enableFFT(), fft, fft2, fft_buffer_select_for_serial_transmit, fft_buffer_serial_transmit_elapsed, fftHighRR, fftLowRR, fftRVal, AudioDirector::getAudioStreamObjByName(), high_range, is_active, AppBaseClass::name, note_freq, osc, osc_bank_size, oscBank, pll_f, pll_p, rt_calls, erisAudioAnalyzeFFT1024::toggleActiveRange(), update_calls, and AppBaseClass::update_priority.

Referenced by AppCQT().

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