WebCore::DynamicsCompressorKernel Class Reference

#include <DynamicsCompressorKernel.h>

Public Member Functions
	DynamicsCompressorKernel (float sampleRate, unsigned numberOfChannels)
void	setNumberOfChannels (unsigned)
void	process (float *sourceChannels[], float *destinationChannels[], unsigned numberOfChannels, unsigned framesToProcess, float dbThreshold, float dbKnee, float ratio, float attackTime, float releaseTime, float preDelayTime, float dbPostGain, float effectBlend, float releaseZone1, float releaseZone2, float releaseZone3, float releaseZone4)
void	reset ()
unsigned	latencyFrames () const
float	sampleRate () const
float	meteringGain () const

Protected Types
enum	{ MaxPreDelayFrames = 1024 }
enum	{ MaxPreDelayFramesMask = MaxPreDelayFrames - 1 }
enum	{ DefaultPreDelayFrames = 256 }

Protected Member Functions
void	setPreDelayTime (float)
float	kneeCurve (float x, float k)
float	saturate (float x, float k)
float	slopeAt (float x, float k)
float	kAtSlope (float desiredSlope)
float	updateStaticCurveParameters (float dbThreshold, float dbKnee, float ratio)

Protected Attributes
float	m_sampleRate
float	m_detectorAverage
float	m_compressorGain
float	m_meteringReleaseK
float	m_meteringGain
unsigned	m_lastPreDelayFrames
Vector< std::unique_ptr< AudioFloatArray > >	m_preDelayBuffers
int	m_preDelayReadIndex
int	m_preDelayWriteIndex
float	m_maxAttackCompressionDiffDb
float	m_ratio
float	m_slope
float	m_linearThreshold
float	m_dbThreshold
float	m_dbKnee
float	m_kneeThreshold
float	m_kneeThresholdDb
float	m_ykneeThresholdDb
float	m_K

Member Enumeration Documentation

anonymous enum

anonymous enum

protected

Enumerator
MaxPreDelayFrames

anonymous enum

anonymous enum

protected

Enumerator
MaxPreDelayFramesMask

anonymous enum

anonymous enum

protected

Enumerator
DefaultPreDelayFrames

Constructor & Destructor Documentation

DynamicsCompressorKernel()

WebCore::DynamicsCompressorKernel::DynamicsCompressorKernel	(	float	sampleRate,
		unsigned	numberOfChannels
	)

Member Function Documentation

kAtSlope()

float WebCore::DynamicsCompressorKernel::kAtSlope ( float  desiredSlope )

protected

kneeCurve()

float WebCore::DynamicsCompressorKernel::kneeCurve ( float  x, float  k  )

protected

latencyFrames()

unsigned WebCore::DynamicsCompressorKernel::latencyFrames ( ) const

inline

meteringGain()

float WebCore::DynamicsCompressorKernel::meteringGain ( ) const

inline

process()

void WebCore::DynamicsCompressorKernel::process	(	float *	sourceChannels[],
		float *	destinationChannels[],
		unsigned	numberOfChannels,
		unsigned	framesToProcess,
		float	dbThreshold,
		float	dbKnee,
		float	ratio,
		float	attackTime,
		float	releaseTime,
		float	preDelayTime,
		float	dbPostGain,
		float	effectBlend,
		float	releaseZone1,
		float	releaseZone2,
		float	releaseZone3,
		float	releaseZone4
	)

reset()

void WebCore::DynamicsCompressorKernel::reset

(

)

sampleRate()

float WebCore::DynamicsCompressorKernel::sampleRate ( ) const

inline

saturate()

float WebCore::DynamicsCompressorKernel::saturate ( float  x, float  k  )

protected

setNumberOfChannels()

void WebCore::DynamicsCompressorKernel::setNumberOfChannels

(

unsigned

)

setPreDelayTime()

void WebCore::DynamicsCompressorKernel::setPreDelayTime ( float  )

protected

slopeAt()

float WebCore::DynamicsCompressorKernel::slopeAt ( float  x, float  k  )

protected

updateStaticCurveParameters()

float WebCore::DynamicsCompressorKernel::updateStaticCurveParameters ( float  dbThreshold, float  dbKnee, float  ratio  )

protected

Member Data Documentation

m_compressorGain

float WebCore::DynamicsCompressorKernel::m_compressorGain

protected

m_dbKnee

float WebCore::DynamicsCompressorKernel::m_dbKnee

protected

m_dbThreshold

float WebCore::DynamicsCompressorKernel::m_dbThreshold

protected

m_detectorAverage

float WebCore::DynamicsCompressorKernel::m_detectorAverage

protected

m_K

float WebCore::DynamicsCompressorKernel::m_K

protected

m_kneeThreshold

float WebCore::DynamicsCompressorKernel::m_kneeThreshold

protected

m_kneeThresholdDb

float WebCore::DynamicsCompressorKernel::m_kneeThresholdDb

protected

m_lastPreDelayFrames

unsigned WebCore::DynamicsCompressorKernel::m_lastPreDelayFrames

protected

m_linearThreshold

float WebCore::DynamicsCompressorKernel::m_linearThreshold

protected

m_maxAttackCompressionDiffDb

float WebCore::DynamicsCompressorKernel::m_maxAttackCompressionDiffDb

protected

m_meteringGain

float WebCore::DynamicsCompressorKernel::m_meteringGain

protected

m_meteringReleaseK

float WebCore::DynamicsCompressorKernel::m_meteringReleaseK

protected

m_preDelayBuffers

Vector<std::unique_ptr<AudioFloatArray> > WebCore::DynamicsCompressorKernel::m_preDelayBuffers

protected

m_preDelayReadIndex

int WebCore::DynamicsCompressorKernel::m_preDelayReadIndex

protected

m_preDelayWriteIndex

int WebCore::DynamicsCompressorKernel::m_preDelayWriteIndex

protected

m_ratio

float WebCore::DynamicsCompressorKernel::m_ratio

protected

m_sampleRate

float WebCore::DynamicsCompressorKernel::m_sampleRate

protected

m_slope

float WebCore::DynamicsCompressorKernel::m_slope

protected

m_ykneeThresholdDb

float WebCore::DynamicsCompressorKernel::m_ykneeThresholdDb

protected

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

• Source/WebCore/platform/audio/DynamicsCompressorKernel.h