dplug.core.math

DSP utility functions.

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convertFrequencyToMIDINote float convertFrequencyToMIDINote(float frequency): Mapping from frequency to MIDI notes.
convertFrequencyToNormalizedFrequency float convertFrequencyToNormalizedFrequency(float frequencyHz, float samplingRate): Computes a normalized frequency form a frequency.
convertMIDINoteToFrequency float convertMIDINoteToFrequency(float note): Mapping from MIDI notes to frequency.
convertNormalizedFreqyencyToFrequency float convertNormalizedFreqyencyToFrequency(float frequencyCyclesPerSample, float samplingRate): Computes a frequency.
deciBelToFloat T deciBelToFloat(T dB): Convert from dB to float.
equalLoudnessCurve T equalLoudnessCurve(T frequency): Fletcher and Munson equal-loudness curve Reference: Xavier Serra thesis (1989).
expDecayFactor double expDecayFactor(double timeConstantInSeconds, double samplerate): Gets a factor for making exponential decay curves.
floatToDeciBel T floatToDeciBel(T x): Convert from float to dB
hermite T hermite(T frac_pos, T xm1, T x0, T x1, T x2): Hermite interpolation.
iFloorLog2 int iFloorLog2(int i)
inverseSqrt T inverseSqrt(T x): SSE approximation of reciprocal square root.
isEven bool isEven(T i): Is this integer even?
isOdd bool isOdd(T i): Is this integer odd?
isPowerOfTwo bool isPowerOfTwo(int i)
lerp S lerp(S a, S b, T t): Linear interpolation, akin to GLSL's mix.
linmap T linmap(T value, T a, T b, T c, T d): Map linearly x from the range [a, b] to the range [c, d]
logmap T logmap(T t, T min, T max): map [0..1] to min..max logarithmically min and max must be all > 0, t in [0..1]
nextPowerOf2 int nextPowerOf2(int i): Computes next power of 2.
nextPowerOf2 long nextPowerOf2(long i): Computes next power of 2.
normalizePhase T normalizePhase(T phase): Give back a phase between -PI and PI
rawSawtooth T rawSawtooth(T x): Quick and dirty sawtooth for testing purposes.
rawSquare T rawSquare(T x): Quick and dirty square for testing purposes.
rawTriangle T rawTriangle(T x): Quick and dirty triangle for testing purposes.
sinc T sinc(T x): Cardinal sine
smoothStep T smoothStep(T a, T b, T t): Same as GLSL smoothstep function. See: http://en.wikipedia.org/wiki/Smoothstep

dplug.core.math

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