tracktion::engine::AudioFadeCurve Struct Reference

#include <tracktion_AudioFadeCurve.h>

Classes
struct	Concave
	A concave sine-shaped curve. More...
struct	Convex
	A convex sine-shaped curve. More...
struct	CrossfadeLevels
	Calculates the two gain multipliers to use for mixing between two sources, given a position alpha from 0 to 1.0. More...
struct	Linear
	A linear fade curve. More...
struct	SCurve
	An S-shaped curve. More...

Public Types
enum	Type { linear = 1 , convex = 2 , concave = 3 , sCurve = 4 }
	A enumeration of the curve classes available. More...

Static Public Member Functions
template<typename CurveClass >
static float	alphaToGain (float alpha) noexcept
	Converts an alpha position along the curve (0 to 1.0) into the gain at that point.
static float	alphaToGainForType (Type type, float alpha) noexcept
	Converts an alpha position along the curve (0 to 1.0) into the gain at that point.
template<typename CurveClass , typename DestSamplePointer >
static void	renderBlock (DestSamplePointer &dest, int numSamples, float startAlpha, float endAlpha) noexcept
	Multiplies a block of samples by the curve shape between two alpha-positions.
template<typename DestSamplePointer >
static void	renderBlockForType (DestSamplePointer &dest, int numSamples, float startAlpha, float endAlpha, Type type) noexcept
	Multiplies a block of samples by the curve shape between two alpha-positions.
static void	applyCrossfadeSection (juce::AudioBuffer< float > &, int channel, int startSample, int numSamples, Type type, float startAlpha, float endAlpha)
static void	applyCrossfadeSection (juce::AudioBuffer< float > &, int startSample, int numSamples, Type type, float startAlpha, float endAlpha)
static void	addWithCrossfade (juce::AudioBuffer< float > &dest, const juce::AudioBuffer< float > &src, int destChannel, int destStartIndex, int sourceChannel, int sourceStartIndex, int numSamples, Type type, float startAlpha, float endAlpha)
static void	drawFadeCurve (juce::Graphics &, const AudioFadeCurve::Type, float x1, float x2, float top, float bottom, juce::Rectangle< int > clip)

Member Enumeration Documentation

Type

enum tracktion::engine::AudioFadeCurve::Type

A enumeration of the curve classes available.

Enumerator
linear
convex
concave
sCurve

Member Function Documentation

alphaToGain()

template<typename CurveClass >

static float tracktion::engine::AudioFadeCurve::alphaToGain ( float  alpha )

staticnoexcept

Converts an alpha position along the curve (0 to 1.0) into the gain at that point.

alphaToGainForType()

static float tracktion::engine::AudioFadeCurve::alphaToGainForType ( Type  type, float  alpha  )

staticnoexcept

Converts an alpha position along the curve (0 to 1.0) into the gain at that point.

References concave, convex, linear, and sCurve.

renderBlock()

template<typename CurveClass , typename DestSamplePointer >

static void tracktion::engine::AudioFadeCurve::renderBlock ( DestSamplePointer &  dest, int  numSamples, float  startAlpha, float  endAlpha  )

staticnoexcept

Multiplies a block of samples by the curve shape between two alpha-positions.

The DestSamplePointer object must be a class that implements an apply() method that gets called with each gain level.

renderBlockForType()

template<typename DestSamplePointer >

static void tracktion::engine::AudioFadeCurve::renderBlockForType ( DestSamplePointer &  dest, int  numSamples, float  startAlpha, float  endAlpha, Type  type  )

staticnoexcept

Multiplies a block of samples by the curve shape between two alpha-positions.

The DestSamplePointer object must be a class that implements an apply() method that gets called with each gain level.

References concave, convex, linear, and sCurve.

applyCrossfadeSection() [1/2]

static void tracktion::engine::AudioFadeCurve::applyCrossfadeSection ( juce::AudioBuffer< float > &  , int  channel, int  startSample, int  numSamples, Type  type, float  startAlpha, float  endAlpha  )

static

applyCrossfadeSection() [2/2]

static void tracktion::engine::AudioFadeCurve::applyCrossfadeSection ( juce::AudioBuffer< float > &  , int  startSample, int  numSamples, Type  type, float  startAlpha, float  endAlpha  )

static

addWithCrossfade()

static void tracktion::engine::AudioFadeCurve::addWithCrossfade ( juce::AudioBuffer< float > &  dest, const juce::AudioBuffer< float > &  src, int  destChannel, int  destStartIndex, int  sourceChannel, int  sourceStartIndex, int  numSamples, Type  type, float  startAlpha, float  endAlpha  )

static

drawFadeCurve()

static void tracktion::engine::AudioFadeCurve::drawFadeCurve ( juce::Graphics &  , const AudioFadeCurve::Type  , float  x1, float  x2, float  top, float  bottom, juce::Rectangle< int >  clip  )

static

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The documentation for this struct was generated from the following file:

• tracktion_AudioFadeCurve.h