MapToPositiveHalfIndex.h File Reference

#include <cassert>

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Functions
constexpr auto	MapToPositiveHalfIndex (int index, int fullSize)
	Useful when dealing with symmetric spectra reduced only to their positive half. See tests below for more details. More...

Function Documentation

MapToPositiveHalfIndex()

constexpr auto MapToPositiveHalfIndex ( int  index, int  fullSize  )

constexpr

Useful when dealing with symmetric spectra reduced only to their positive half. See tests below for more details.

Parameters

fullSize

The size of the original vector. Must be strictly positive and even, or the function will return 0.

Precondition

fullSize > 0 && fullSize % 2 == 0

Definition at line 12 of file MapToPositiveHalfIndex.h.

{
   assert(fullSize > 0 && fullSize % 2 == 0);
   if (index >= 0)
      index = index % fullSize;
   else
      index = fullSize - (-index % fullSize);
   if (index > fullSize / 2)
      index = fullSize - index;
   return index;
}

Referenced by MIR::anonymous_namespace{GetMeterUsingTatumQuantizationFit.cpp}::GetBeatSelfSimilarityScore(), and anonymous_namespace{FormantShifter.cpp}::ResampleFreqDomain().

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