Compressor Class Reference

Compressor inspired by https://github.com/YetAnotherElectronicsChannel/STM32_DSP_COMPRESSOR/blob/master/code/Src/main.c. More...

#include <AudioEffect.h>

Inheritance diagram for Compressor:

Public Member Functions
	Compressor (const Compressor &copy)=default
	Copy Constructor.
	Compressor (uint32_t sampleRate=44100, uint16_t attackMs=30, uint16_t releaseMs=20, uint16_t holdMs=10, uint8_t thresholdPercent=10, float compressionRatio=0.5)
	Default Constructor.
virtual bool	active ()
	determines if the effect is active
Compressor *	clone ()
int	id ()
	Allows to identify an effect.
effect_t	process (effect_t input)
	Processes the sample.
virtual void	setActive (bool value)
	sets the effect active/inactive
void	setAttack (uint16_t attackMs)
	Defines the attack duration in ms.
void	setCompressionRatio (float compressionRatio)
	Defines the compression ratio from 0 to 1.
void	setHold (uint16_t holdMs)
	Defines the hold duration in ms.
void	setId (int id)
	Allows to identify an effect.
void	setRelease (uint16_t releaseMs)
	Defines the release duration in ms.
void	setThresholdPercent (uint8_t thresholdPercent)
	Defines the threshod in %.

Protected Types
enum	CompStates { S_NoOperation , S_Attack , S_GainReduction , S_Release }

Protected Member Functions
int16_t	clip (int32_t in, int16_t clipLimit=32767, int16_t resultLimit=32767)
	generic clipping method
float	compress (float inSampleF)
void	copyParent (AudioEffect *copy)
void	recalculate ()

Protected Attributes
bool	active_flag = true
int32_t	attack_count
float	gain
float	gain_step_attack
float	gain_step_release
float	gainreduce
int32_t	hold_count
int	id_value = -1
int32_t	release_count
uint32_t	sample_rate
enum CompStates	state = S_NoOperation
float	threshold
int32_t	timeout

Detailed Description

Compressor inspired by https://github.com/YetAnotherElectronicsChannel/STM32_DSP_COMPRESSOR/blob/master/code/Src/main.c.

Author

Phil Schatzmann

Copyright

GPLv3

Member Enumeration Documentation

CompStates

enum CompStates

protected

Enumerator
S_NoOperation
S_Attack
S_GainReduction
S_Release

Constructor & Destructor Documentation

Compressor() [1/2]

Compressor ( const Compressor &  copy )

default

Copy Constructor.

Compressor() [2/2]

Compressor ( uint32_t  sampleRate = 44100, uint16_t  attackMs = 30, uint16_t  releaseMs = 20, uint16_t  holdMs = 10, uint8_t  thresholdPercent = 10, float  compressionRatio = 0.5  )

inline

Default Constructor.

Member Function Documentation

active()

virtual bool active ( )

inlinevirtualinherited

determines if the effect is active

clip()

int16_t clip ( int32_t  in, int16_t  clipLimit = 32767, int16_t  resultLimit = 32767  )

inlineprotectedinherited

generic clipping method

clone()

Compressor * clone ( )

inlinevirtual

Implements AudioEffect.

compress()

float compress ( float  inSampleF )

inlineprotected

copyParent()

void copyParent ( AudioEffect *  copy )

inlineprotectedinherited

id()

int id ( )

inlineinherited

Allows to identify an effect.

process()

effect_t process ( effect_t  input )

inlinevirtual

Processes the sample.

Implements AudioEffect.

recalculate()

void recalculate ( )

inlineprotected

setActive()

virtual void setActive ( bool  value )

inlinevirtualinherited

sets the effect active/inactive

setAttack()

void setAttack ( uint16_t  attackMs )

inline

Defines the attack duration in ms.

setCompressionRatio()

void setCompressionRatio ( float  compressionRatio )

inline

Defines the compression ratio from 0 to 1.

setHold()

void setHold ( uint16_t  holdMs )

inline

Defines the hold duration in ms.

setId()

void setId ( int  id )

inlineinherited

Allows to identify an effect.

setRelease()

void setRelease ( uint16_t  releaseMs )

inline

Defines the release duration in ms.

setThresholdPercent()

void setThresholdPercent ( uint8_t  thresholdPercent )

inline

Defines the threshod in %.

Member Data Documentation

active_flag

bool active_flag = true

protectedinherited

attack_count

int32_t attack_count

protected

gain

float gain

protected

gain_step_attack

float gain_step_attack

protected

gain_step_release

float gain_step_release

protected

gainreduce

float gainreduce

protected

hold_count

int32_t hold_count

protected

id_value

int id_value = -1

protectedinherited

release_count

int32_t release_count

protected

sample_rate

uint32_t sample_rate

protected

state

enum CompStates state = S_NoOperation

protected

threshold

float threshold

protected

timeout

int32_t timeout

protected

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

• src/AudioTools/CoreAudio/AudioEffects/AudioEffect.h