Public Types | Static Public Member Functions | Static Public Attributes | List of all members
AudioLevel Class Reference

AudioLevel converts audio sample levels between various scales: More...

#include <AudioLevel.h>

Public Types

enum  FaderType {
  ShortFader = 0, LongFader = 1, IEC268Meter = 2, IEC268LongMeter = 3,
  PreviewLevel = 4
}
 

Static Public Member Functions

static double multiplier_to_dB (double multiplier)
 
static double dB_to_multiplier (double dB)
 
static double fader_to_dB (int level, int maxLevel, FaderType type)
 
static int dB_to_fader (double dB, int maxFaderLevel, FaderType type)
 
static double fader_to_multiplier (int level, int maxLevel, FaderType type)
 
static int multiplier_to_fader (double multiplier, int maxFaderLevel, FaderType type)
 
static int multiplier_to_preview (double multiplier, int levels)
 
static double preview_to_multiplier (int level, int levels)
 

Static Public Attributes

static const double DB_FLOOR = -1000.
 

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.

Member Enumeration Documentation

enum AudioLevel::FaderType
Enumerator
ShortFader 
LongFader 
IEC268Meter 
IEC268LongMeter 
PreviewLevel 

Definition at line 40 of file AudioLevel.h.

Member Function Documentation

double AudioLevel::multiplier_to_dB ( double  multiplier)
static

Definition at line 50 of file AudioLevel.cpp.

double AudioLevel::dB_to_multiplier ( double  dB)
static

Definition at line 59 of file AudioLevel.cpp.

double AudioLevel::fader_to_dB ( int  level,
int  maxLevel,
FaderType  type 
)
static

Definition at line 113 of file AudioLevel.cpp.

References iec_dB_to_fader(), iec_fader_to_dB(), FaderDescription::maxDb, FaderDescription::minDb, and FaderDescription::zeroPoint.

int AudioLevel::dB_to_fader ( double  dB,
int  maxFaderLevel,
FaderType  type 
)
static

Definition at line 150 of file AudioLevel.cpp.

References iec_dB_to_fader(), FaderDescription::maxDb, FaderDescription::minDb, and FaderDescription::zeroPoint.

double AudioLevel::fader_to_multiplier ( int  level,
int  maxLevel,
FaderType  type 
)
static

Definition at line 204 of file AudioLevel.cpp.

int AudioLevel::multiplier_to_fader ( double  multiplier,
int  maxFaderLevel,
FaderType  type 
)
static

Definition at line 211 of file AudioLevel.cpp.

int AudioLevel::multiplier_to_preview ( double  multiplier,
int  levels 
)
static

Definition at line 220 of file AudioLevel.cpp.

double AudioLevel::preview_to_multiplier ( int  level,
int  levels 
)
static

Definition at line 227 of file AudioLevel.cpp.

Member Data Documentation

const double AudioLevel::DB_FLOOR = -1000.
static

Definition at line 38 of file AudioLevel.h.

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