MirUtils.h

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/*  SPDX-License-Identifier: GPL-2.0-or-later */
/*!********************************************************************
 
  Audacity: A Digital Audio Editor
 
  MirUtils.h
 
  Matthieu Hodgkinson
 
**********************************************************************/
#pragma once
 
#include <algorithm>
#include <vector>
 
namespace MIR
{
std::vector<int> GetPossibleBarDivisors(int lower, int upper);
 
std::vector<int> GetPeakIndices(const std::vector<float>& x);
 
std::vector<float> GetNormalizedHann(int size);
 
constexpr auto IsPowOfTwo(int x)
{
   return x > 0 && (x & (x - 1)) == 0;
}
 
//*******************************
//          TESTS
//*******************************
 
static_assert(!IsPowOfTwo(-2));
static_assert(!IsPowOfTwo(-1));
static_assert(!IsPowOfTwo(0));
static_assert(IsPowOfTwo(1));
static_assert(IsPowOfTwo(2));
static_assert(!IsPowOfTwo(3));
static_assert(IsPowOfTwo(4));
} // namespace MIR