C++ FloatArray::getSize方法代码示例

void FloatArray::convolve(FloatArray operand2, FloatArray destination, int offset, int samples){
  ASSERT(destination.size >= size + operand2.size -1, "Destination array too small"); //TODO: change this condition to the actual size being written(will be samples+ tail)
/// @note When built for ARM Cortex-M processor series, this method uses the optimized <a href="http://www.keil.com/pack/doc/CMSIS/General/html/index.html">CMSIS library</a>
#ifdef ARM_CORTEX
  //TODO: I suspect a bug in arm_conv_partial_f32
  //it seems that destination[n] is left unchanged for n<offset
  //and the result is actually stored from destination[offset] onwards
  //that is, in the same position where they would be if a full convolution was performed.
  //This requires (destination.size >= size + operand2.size -1). Ideally you would want destination to be smaller
  arm_conv_partial_f32(data, size, operand2.data, operand2.size, destination.getData(), offset, samples);
#else
  //this implementations reproduces the (buggy?) behaviour of arm_conv_partial (see comment above and inline comments below)
  /*
  This implementation is just a copy/paste/edit from the overloaded method
  */
  int size2=operand2.getSize();
  for (int n=offset; n<offset+samples; n++){
    int n1=n;
    destination[n] =0; //this should be [n-offset]
    for(int k=0; k<size2; k++){
      if(n1>=0 && n1<size)
        destination[n]+=data[n1]*operand2[k];//this should be destination[n-offset]
      n1--;
    }
  }
#endif /* ARM_CORTEX */
}

  void trigger(FloatArray samples){
    for(int i=0; i<samples.getSize(); ++i)
      if(volts.sampleToVolts(samples[i]) > threshold && !state){
	state = true;
	env->trigger(i);
      }else{
	state = false;
      }
  }

void ComplexFloatArray::setMagnitude(FloatArray magnitude, int offset, int count, ComplexFloatArray destination){
  ASSERT(getSize()==magnitude.getSize(),"wrong size0");
  ASSERT(getSize()==destination.getSize(),"wrong size1");
  ASSERT(offset+count<=destination.getSize(), "Wrong size2");
  ASSERT(offset+count<=getSize(), "Wrong size3");
  for(int n=offset; n<count+offset; n++){
    destination.getData()[n].setPolar(magnitude[n], getData()[n].getPhase());
  }
}

void FloatArray::rectify(FloatArray& destination){ //this is actually "copy data with rectifify"
/// @note When built for ARM Cortex-M processor series, this method uses the optimized <a href="http://www.keil.com/pack/doc/CMSIS/General/html/index.html">CMSIS library</a>
#ifdef ARM_CORTEX   
  arm_abs_f32(data, destination.getData(), size);
#else
  int minSize= min(size,destination.getSize()); //TODO: shall we take this out and allow it to segfault?
  for(int n=0; n<minSize; n++){
    destination[n] = fabs(data[n]);
  }
#endif  
}

  void getSamples(FloatArray samples){
    for(int i=0; i<samples.getSize(); ++i){
      if(volts.sampleToVolts(samples[i]) > threshold){
	if(!state){
	  state = true;
	  drum->trigger();
	}
      }else{
	state = false;
      }
      samples[i] = drum->getNextSample();
    }
  }

void ComplexFloatArray::complexByRealMultiplication(FloatArray& operand2, ComplexFloatArray& result){
  int minSize= min(size,operand2.getSize()); //TODO: shall we take this out and allow it to segfault?
#ifdef ARM_CORTEX
  arm_cmplx_mult_real_f32 ( (float*)data, (float*)operand2, (float*)result, minSize );  
#else
  float *pSrcCmplx=(float*)data;
  float *pSrcReal=(float*)operand2;
  float *pCmplxDst=(float*)result;
  for(int n=0; n<size; n++) {        
      pCmplxDst[(2*n)+0] = pSrcCmplx[(2*n)+0] * pSrcReal[n];        
      pCmplxDst[(2*n)+1] = pSrcCmplx[(2*n)+1] * pSrcReal[n];        
  }        
#endif
}

  void gate(FloatArray samples){
    for(int i=0; i<samples.getSize(); ++i){
      if(volts.sampleToVolts(samples[i]) > threshold){
	if(!state){
	  env->gate(true, i);
	  state = true;
	}
      }else{
	if(state){
	  env->gate(false, i);
	  state = false;
	}
      }
    }
  }

void FloatArray::copyFrom(FloatArray source){
/// @note When built for ARM Cortex-M processor series, this method uses the optimized <a href="http://www.keil.com/pack/doc/CMSIS/General/html/index.html">CMSIS library</a>
  copyFrom(source, min(size, source.getSize()));
}

/* Copies real part to a FloatArray */
void ComplexFloatArray::copyTo(FloatArray destination){
  for(int n=0; n<min(size,destination.getSize()); n++){
    destination[n]=data[n].re;
  }
}

/* Copies real values from a FloatArray, sets imaginary values to 0
 */
void ComplexFloatArray::copyFrom(FloatArray source){
  for(int n=0; n<min(size,source.getSize()); n++){
    data[n].re=source[n];
    data[n].im=0;
  }
}