Class: AudioStream::Decibel

Inherits:
Object
  • Object
show all
Defined in:
lib/audio_stream/decibel.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(db: nil, mag: nil) ⇒ Decibel

Returns a new instance of Decibel.



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# File 'lib/audio_stream/decibel.rb', line 3

def initialize(db: nil, mag: nil)
  @db = db
  @mag = mag
end

Class Method Details

.db(db) ⇒ Object 



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# File 'lib/audio_stream/decibel.rb', line 16

def self.db(db)
  if self===db
    db
  else
    new(db: db.to_f)
  end
end

.mag(mag) ⇒ Object 



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# File 'lib/audio_stream/decibel.rb', line 24

def self.mag(mag)
  if self===mag
    mag
  else
    new(mag: mag.to_f)
  end
end

Instance Method Details

#db ⇒ Object 



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# File 'lib/audio_stream/decibel.rb', line 8

def db
  @db || 20 * Math.log10(@mag)
end

#mag ⇒ Object 



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# File 'lib/audio_stream/decibel.rb', line 12

def mag
  @mag || 10 ** (@db / 20.0)
end