Simple Flanger Effect Consistig of a single voice flanger The flanger has an effective range between 0 and 15 miliseconds in this case dleay buffer should be set to sampleRate*3/200 Constructor requires internal delay in samples. More...

#include <AudioEffectsSuite.h>

Inheritance diagram for SimpleFlanger:

Public Member Functions
	SimpleFlanger ()=default

	SimpleFlanger (effectsuite_t extSampleRate=44100)

	SimpleFlanger (SimpleFlanger &copy)=default

	~SimpleFlanger ()=default

virtual bool	active ()
	determines if the effect is active

SimpleFlanger *	clone () override

int	id ()
	Allows to identify an effect.

effectsuite_t	processDouble (effectsuite_t inputSample) override

virtual void	setActive (bool value)
	sets the effect active/inactive

void	setDepth (const effectsuite_t depth)

void	setEffectGain (effectsuite_t gain)

void	setEffectParams (effectsuite_t gain, effectsuite_t depth, effectsuite_t rate)

void	setId (int id)
	Allows to identify an effect.

void	setRate (const effectsuite_t rate)

void	setupDelayEffectBase (const int bufferSizeSamples)

void	setupSimpleFlanger (effectsuite_t extSampleRate)

Protected Member Functions
effectsuite_t	capGain (effectsuite_t gain)

int16_t	clip (int32_t in, int16_t clipLimit=32767, int16_t resultLimit=32767)
	generic clipping method

void	copyParent (AudioEffect *copy)

void	delaySample (effectsuite_t inputSample)

effectsuite_t	getInterpolatedOut (effectsuite_t bufferIndex)

void	incDelayBuffReadIndex (effectsuite_t indexInc)

void	incDelayBuffWriteIndex ()

void	setAngleDelta ()

bool	setDelayBuffer (int bufferSizeSamples)

void	setDelayBuffReadIndex (effectsuite_t index)

void	storeSample (effectsuite_t inputSample)

void	updateModulation ()

Static Protected Member Functions
static effectsuite_t **	setInterpolationTable ()

Protected Attributes
bool	active_flag = true

effectsuite_t	angleDelta = 2.0f * 3.141592653589793f * timeStep

effectsuite_t	currentDelayReadIndex = 0

int	currentDelayWriteIndex = 0

effectsuite_t *	delayBuffer = 0

int	delayTimeSamples = 44100

effectsuite_t	effectGain = .01

bool	error

int	id_value = -1

int	maxDelayBufferSize = 441000

effectsuite_t	modulationAngle = 0

effectsuite_t	modulationConstant

effectsuite_t	modulationDepth = 1000

effectsuite_t	modulationIndex = 0

effectsuite_t	modulationRate = 0

effectsuite_t	timeStep = 1. / 44100.

Static Protected Attributes
static const int	interpOrder = 4

static const int	interpResolution = 1000

Detailed Description

Simple Flanger Effect Consistig of a single voice flanger The flanger has an effective range between 0 and 15 miliseconds in this case dleay buffer should be set to sampleRate*3/200 Constructor requires internal delay in samples.

See also: process

Author: Matthew Hamilton

Copyright: MIT License

Constructor & Destructor Documentation

◆ SimpleFlanger()

SimpleFlanger ( )

default

Constructor: DigitalEffect Base Must Be initialised

See also: DelayEffectBase constructor

◆ ~SimpleFlanger()

~SimpleFlanger ( )

default

Destructor.

Member Function Documentation

◆ capGain()

effectsuite_t capGain ( effectsuite_t gain )

inlineprotected

capGain: caps gain to a range of 1 and -1;

Parameters

gain	address of gain value

◆ delaySample()

void delaySample ( effectsuite_t inputSample )

inlineprotectedinherited

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 )

inlineprotectedinherited

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 )

inlineprotectedinherited

Increments the currentDelayBufferReadIndex by indexInc

Parameters

indexInc The amount to increment the delay buffer index

◆ incDelayBuffWriteIndex()

void incDelayBuffWriteIndex ( )

inlineprotectedinherited

Increments the currentDelayWriteBufferIndex by 1

◆ processDouble()

effectsuite_t processDouble ( effectsuite_t inputSample )

inlineoverridevirtual

Apply the DSP effect

Implements EffectSuiteBase.

◆ setAngleDelta()

void setAngleDelta ( )

inlineprotected

setAngleDelta: sets the angleDelta for delay modulation

◆ setDelayBuffer()

bool setDelayBuffer ( int bufferSizeSamples )

inlineprotectedinherited

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 )

inlineprotectedinherited

sets the currentDelayBufferReadIndex by indexInc (Currently no wrapping)

Parameters

index the read index index required

◆ setDepth()

void setDepth ( const effectsuite_t depth )

inline

<#Description#>

Parameters

depth <#depth description#>

◆ setEffectGain()

void setEffectGain ( effectsuite_t gain )

inline

setEffectGain: sets the effect gain to a value between 1 and -1

Parameters

gain	required delay gain. Values beyond 1 and -1 are capped to the maximum to avoid idiocy. Negative velus invoke a phase inversion.

◆ setEffectParams()

void setEffectParams	(	effectsuite_t	gain,
		effectsuite_t	depth,
		effectsuite_t	rate
	)

inline

setEffectGain: sets the parameters for effect

Parameters

gain	effect gain
depth	depth of modulation in samples
rate	rate of modulation in Hz

◆ setInterpolationTable()

static effectsuite_t** setInterpolationTable ( )

inlinestaticprotectedinherited

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

◆ setRate()

void setRate ( const effectsuite_t rate )

inline

<#Description#>

Parameters

rate	<#rate description#>

◆ setupDelayEffectBase()

void setupDelayEffectBase ( const int bufferSizeSamples )

inlineinherited

<#Description#>

Parameters

bufferSizeSamples <#bufferSizeSamples description#>

◆ storeSample()

void storeSample ( effectsuite_t inputSample )

inlineprotectedinherited

store input sample into the delay buffer

Parameters

inputSample sample to be stored for delay (effectsuite_t)

◆ updateModulation()

void updateModulation ( )

inlineprotected

updateModulation: updates the modulationIndex by the correct increment

Member Data Documentation

◆ angleDelta

effectsuite_t angleDelta = 2.0f * 3.141592653589793f * timeStep

protected

increment value for modulation signal

◆ delayBuffer

effectsuite_t* delayBuffer = 0

protectedinherited

buffer to stored audio buffer for delay effects

◆ delayTimeSamples

int delayTimeSamples = 44100

protectedinherited

the delay time of signal in samples

◆ error

bool error

protectedinherited

internal class error boolean

◆ maxDelayBufferSize

int maxDelayBufferSize = 441000

protectedinherited

Maximum number of samples that can be stored in delayBuffer

◆ modulationConstant

effectsuite_t modulationConstant

protected

2 * pi * modulationRate / sampleRate

◆ timeStep

effectsuite_t timeStep = 1. / 44100.

protected

1/sampleRate: The time in seconds between samples

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

src/AudioTools/AudioLibs/AudioEffectsSuite.h

Public Member Functions

Protected Member Functions

Static Protected Member Functions

Protected Attributes

Static Protected Attributes

Detailed Description

Constructor & Destructor Documentation

◆ SimpleFlanger()

◆ ~SimpleFlanger()

Member Function Documentation

◆ capGain()

◆ delaySample()

◆ getInterpolatedOut()

◆ incDelayBuffReadIndex()

◆ incDelayBuffWriteIndex()

◆ processDouble()

◆ setAngleDelta()

◆ setDelayBuffer()

◆ setDelayBuffReadIndex()

◆ setDepth()

◆ setEffectGain()

◆ setEffectParams()

◆ setInterpolationTable()

◆ setRate()

◆ setupDelayEffectBase()

◆ storeSample()

◆ updateModulation()

Member Data Documentation

◆ angleDelta

◆ delayBuffer

◆ delayTimeSamples

◆ error

◆ maxDelayBufferSize

◆ modulationConstant

◆ timeStep