AudioLevel Class Reference

#include <AudioLevel.h>

List of all members.

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Detailed Description

AudioLevel converts audio sample levels between various scales:.

• dB values (-inf -> 0dB)
• floating-point values (-1.0 -> 1.0) such as used for a multiplier for gain or in floating-point WAV files
• integer values intended to correspond to pixels on a fader or vu level scale.

Definition at line 34 of file AudioLevel.h.

Public Types
enum	FaderType {   ShortFader = 0, LongFader = 1, IEC268Meter = 2, IEC268LongMeter = 3,   PreviewLevel = 4 }
Static Public Member Functions
static float	multiplier_to_dB (float multiplier)
static float	dB_to_multiplier (float dB)
static float	fader_to_dB (int level, int maxLevel, FaderType type)
static int	dB_to_fader (float dB, int maxFaderLevel, FaderType type)
static float	fader_to_multiplier (int level, int maxLevel, FaderType type)
static int	multiplier_to_fader (float multiplier, int maxFaderLevel, FaderType type)
static int	multiplier_to_preview (float multiplier, int levels)
static float	preview_to_multiplier (int level, int levels)
Static Public Attributes
static const float	DB_FLOOR

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Member Enumeration Documentation

enum AudioLevel::FaderType

Enumerator:

ShortFader
LongFader
IEC268Meter
IEC268LongMeter
PreviewLevel

Definition at line 40 of file AudioLevel.h.

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Member Function Documentation

float AudioLevel::multiplier_to_dB

(

float

multiplier

)

[static]

Definition at line 53 of file AudioLevel.cpp.

References DB_FLOOR.

Referenced by WaveformLayer::dBscale(), dBscale(), WaveformLayer::getFeatureDescription(), SpectrumLayer::getFeatureDescription(), SpectrogramLayer::getFeatureDescription(), SpectrogramLayer::getPropertyRangeAndValue(), SliceLayer::getPropertyRangeAndValue(), SliceLayer::getThresholdDb(), WaveformLayer::getValueExtents(), Fader::mouseDoubleClickEvent(), multiplier_to_fader(), SpectrogramLayer::paintVerticalScale(), and Fader::setValue().

float AudioLevel::dB_to_multiplier

(

float

dB

)

[static]

Definition at line 62 of file AudioLevel.cpp.

References DB_FLOOR.

Referenced by fader_to_multiplier(), WaveformLayer::getValueForY(), Fader::mouseDoubleClickEvent(), WaveformLayer::paint(), PaintAssistant::paintVerticalLevelScale(), WaveformLayer::paintVerticalScale(), SpectrogramLayer::paintVerticalScale(), SliceLayer::paintVerticalScale(), SpectrogramLayer::setProperty(), SliceLayer::setProperty(), and Fader::setValue().

float AudioLevel::fader_to_dB	(	int	level,
		int	maxLevel,
		FaderType	type
	)			[static]

Definition at line 116 of file AudioLevel.cpp.

References DB_FLOOR, faderTypes, IEC268LongMeter, IEC268Meter, iec_dB_to_fader(), and iec_fader_to_dB().

Referenced by fader_to_multiplier(), and Fader::mouseDoubleClickEvent().

int AudioLevel::dB_to_fader	(	float	dB,
		int	maxFaderLevel,
		FaderType	type
	)			[static]

Definition at line 153 of file AudioLevel.cpp.

References DB_FLOOR, faderTypes, IEC268LongMeter, IEC268Meter, and iec_dB_to_fader().

Referenced by multiplier_to_fader().

float AudioLevel::fader_to_multiplier	(	int	level,
		int	maxLevel,
		FaderType	type
	)			[static]

Definition at line 207 of file AudioLevel.cpp.

References dB_to_multiplier(), and fader_to_dB().

Referenced by Fader::mouseMoveEvent(), and preview_to_multiplier().

int AudioLevel::multiplier_to_fader	(	float	multiplier,
		int	maxFaderLevel,
		FaderType	type
	)			[static]

Definition at line 214 of file AudioLevel.cpp.

References dB_to_fader(), and multiplier_to_dB().

Referenced by Fader::mouseMoveEvent(), multiplier_to_preview(), and Fader::paintEvent().

int AudioLevel::multiplier_to_preview	(	float	multiplier,
		int	levels
	)			[static]

Definition at line 240 of file AudioLevel.cpp.

References multiplier_to_fader(), and PreviewLevel.

Referenced by SpectrogramLayer::getDisplayValue(), WaveformLayer::getYForValue(), SliceLayer::getYForValue(), PaintAssistant::getYForValue(), and WaveformLayer::paint().

float AudioLevel::preview_to_multiplier	(	int	level,
		int	levels
	)			[static]

Definition at line 280 of file AudioLevel.cpp.

References fader_to_multiplier(), and PreviewLevel.

Referenced by SpectrogramLayer::getInputForDisplayValue(), WaveformLayer::getValueForY(), and SliceLayer::getValueForY().

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Member Data Documentation

const float AudioLevel::DB_FLOOR [static]

Definition at line 38 of file AudioLevel.h.

Referenced by dB_to_fader(), dB_to_multiplier(), fader_to_dB(), SpectrumLayer::getFeatureDescription(), SpectrogramLayer::getFeatureDescription(), multiplier_to_dB(), and Fader::setValue().

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

• AudioLevel.h
• AudioLevel.cpp

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