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Use @falktx's way for the math constants

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This commit is contained in:
Paul Fd 2020-03-10 14:12:46 +01:00
parent 81ee0f00fd
commit 542bd28a28
3 changed files with 17 additions and 20 deletions
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29
src/sfizz/MathHelpers.h
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@ -124,9 +124,7 @@ inline float midiNoteFrequency(const int noteNumber)
template<class T>
constexpr T clamp( T v, T lo, T hi )
{
v = min(v, hi);
v = max(v, lo);
return v;
return max(min(v, hi), lo);
}
template<int Increment = 1, class T>
@ -148,19 +146,18 @@ constexpr ValueType linearInterpolation(ValueType left, ValueType right, ValueTy
return left * leftCoeff + right * rightCoeff;
}
constexpr double dPi { 3.141592653589793238462643383279502884};
constexpr double dTwoPi { dPi * 2 };
constexpr double dPiTwo { dPi / 2 };
constexpr double dPiFour { dPi / 4 };
constexpr double dSqrtTwo { 1.414213562373095048801688724209698078569671875376948073176 };
constexpr double dSqrtTwoInv { 0.707106781186547524400844362104849039284835937688474036588 };
constexpr float fPi { 3.141592653589793238462643383279502884};
constexpr float fTwoPi { fPi * 2 };
constexpr float fPiTwo { fPi / 2 };
constexpr float fPiFour { fPi / 4 };
constexpr float fSqrtTwo { 1.414213562373095048801688724209698078569671875376948073176 };
constexpr float fSqrtTwoInv { 0.707106781186547524400844362104849039284835937688474036588 };
template<class Type>
constexpr Type pi() { return static_cast<Type>(3.141592653589793238462643383279502884); };
template<class Type>
constexpr Type twoPi() { return pi<Type>() * 2; };
template<class Type>
constexpr Type piTwo() { return pi<Type>() / 2; };
template<class Type>
constexpr Type piFour() { return pi<Type>() / 4; };
template<class Type>
constexpr Type sqrtTwo() { return static_cast<Type>(1.414213562373095048801688724209698078569671875376948073176); };
template<class Type>
constexpr Type sqrtTwoInv() { return static_cast<Type>(0.707106781186547524400844362104849039284835937688474036588); };
/**
@brief A fraction which is parameterized by integer type

2
src/sfizz/SIMDHelpers.h
View file

@ -748,7 +748,7 @@ namespace _internals {
int i = 0;
for (; i < panSize; ++i)
pan[i] = std::cos(i * (dPiTwo / (panSize - 1)));
pan[i] = std::cos(i * (twoPi<double>() / (panSize - 1)));
for (; i < static_cast<int>(pan.size()); ++i)
pan[i] = pan[panSize - 1];

6
src/sfizz/Voice.cpp
View file

@ -479,7 +479,7 @@ void sfz::Voice::fillWithGenerator(AudioSpan<float> buffer) noexcept
auto bends = tempSpan2.first(buffer.getNumFrames());
auto phases = tempSpan2.first(buffer.getNumFrames());
const float step = baseFrequency * fTwoPi / sampleRate;
const float step = baseFrequency * twoPi<float>() / sampleRate;
fill<float>(jumps, step);
if (region->bendStep > 1)
@ -496,8 +496,8 @@ void sfz::Voice::fillWithGenerator(AudioSpan<float> buffer) noexcept
copy<float>(leftSpan, rightSpan);
// Wrap the phase so we don't loose too much precision on longer notes
const auto numTwoPiWraps = static_cast<int>(phase / fTwoPi);
phase -= fTwoPi * static_cast<float>(numTwoPiWraps);
const auto numTwoPiWraps = static_cast<int>(phase / twoPi<float>());
phase -= twoPi<float>() * static_cast<float>(numTwoPiWraps);
}
}