DelayEffectBase Class Reference

A Base class for delay based digital effects. Provides the basic methods that are shared amongst Flanger, Delay, Chorus and Phaser. More...

#include <AudioEffectsSuite.h>

Inheritance diagram for DelayEffectBase:

Public Member Functions
	DelayEffectBase ()=default
	DelayEffectBase (DelayEffectBase &copy)=default
	DelayEffectBase (int bufferSizeSamples)
	~DelayEffectBase ()
void	setupDelayEffectBase (const int bufferSizeSamples)

Protected Member Functions
void	delaySample (effectsuite_t inputSample)
effectsuite_t	getInterpolatedOut (effectsuite_t bufferIndex)
void	incDelayBuffReadIndex (effectsuite_t indexInc)
void	incDelayBuffWriteIndex ()
bool	setDelayBuffer (int bufferSizeSamples)
void	setDelayBuffReadIndex (effectsuite_t index)
void	storeSample (effectsuite_t inputSample)

Static Protected Member Functions
static effectsuite_t **	setInterpolationTable ()

Protected Attributes
effectsuite_t	currentDelayReadIndex = 0
int	currentDelayWriteIndex = 0
effectsuite_t *	delayBuffer = 0
int	delayTimeSamples = 44100
bool	error
int	maxDelayBufferSize = 441000

Static Protected Attributes
static const int	interpOrder = 4
static const int	interpResolution = 1000

Detailed Description

A Base class for delay based digital effects. Provides the basic methods that are shared amongst Flanger, Delay, Chorus and Phaser.

Version

0.1

See also

DelayEffectBase

Author

Matthew Hamilton

Copyright

MIT License

Constructor & Destructor Documentation

DelayEffectBase() [1/3]

DelayEffectBase ( )

default

Constructor.

DelayEffectBase() [2/3]

DelayEffectBase ( DelayEffectBase &  copy )

default

DelayEffectBase() [3/3]

DelayEffectBase ( int  bufferSizeSamples )

inline

~DelayEffectBase()

~DelayEffectBase ( )

inline

Destructor.

Member Function Documentation

delaySample()

void delaySample ( effectsuite_t  inputSample )

inlineprotected

store input sample into the delay buffer and increment currentDelayWriteIndex for tracking when to loop back to start of buffer

Parameters

inputSample

sample to be stored for delay (effectsuite_t)

getInterpolatedOut()

effectsuite_t getInterpolatedOut ( effectsuite_t  bufferIndex )

inlineprotected

get the value of the requested buffer index by interpolating other points

Parameters

bufferIndex

The required buffer index

Returns

interpolated output

incDelayBuffReadIndex()

void incDelayBuffReadIndex ( effectsuite_t  indexInc )

inlineprotected

Increments the currentDelayBufferReadIndex by indexInc

Parameters

indexInc

The amount to increment the delay buffer index

incDelayBuffWriteIndex()

void incDelayBuffWriteIndex ( )

inlineprotected

Increments the currentDelayWriteBufferIndex by 1

setDelayBuffer()

bool setDelayBuffer ( int  bufferSizeSamples )

inlineprotected

Allocates memory for delay buffer and initialises all elements to 0

Parameters

bufferSizeSamples

the size of delay buffer to be used

Returns

false and error description if there's a problem, or sets the internal delay buffer and returns true

setDelayBuffReadIndex()

void setDelayBuffReadIndex ( effectsuite_t  index )

inlineprotected

sets the currentDelayBufferReadIndex by indexInc (Currently no wrapping)

Parameters

index

the read index index required

setInterpolationTable()

static effectsuite_t ** setInterpolationTable ( )

inlinestaticprotected

Sets the internal lagrange interpolation table. Ideally it should be shared amongst all

Returns

false and an error description if there's a problem, or sets the interpolation lookup table and returns true

setupDelayEffectBase()

void setupDelayEffectBase ( const int  bufferSizeSamples )

inline

<Description#>

Parameters

bufferSizeSamples

<bufferSizeSamples description#>

storeSample()

void storeSample ( effectsuite_t  inputSample )

inlineprotected

store input sample into the delay buffer

Parameters

inputSample

sample to be stored for delay (effectsuite_t)

Member Data Documentation

currentDelayReadIndex

effectsuite_t currentDelayReadIndex = 0

protected

currentDelayWriteIndex

int currentDelayWriteIndex = 0

protected

delayBuffer

effectsuite_t* delayBuffer = 0

protected

buffer to stored audio buffer for delay effects

delayTimeSamples

int delayTimeSamples = 44100

protected

the delay time of signal in samples

error

bool error

protected

internal class error boolean

interpOrder

const int interpOrder = 4

staticprotected

interpResolution

const int interpResolution = 1000

staticprotected

maxDelayBufferSize

int maxDelayBufferSize = 441000

protected

Maximum number of samples that can be stored in delayBuffer

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

• src/AudioTools/AudioLibs/AudioEffectsSuite.h