class AMixer2019

file: amixer2019.rb description: A wrapper around the command-line program amixer.

Public Class Methods

new(notch: 5, fade_interval: 0.15, debug: false) click to toggle source

# File lib/amixer2019.rb, line 9
def initialize(notch: 5, fade_interval: 0.15, debug: false)

  @notch, @fade_interval, @debug = notch, fade_interval, debug
  @control = `amixer scontrols`[/(?<=')[^']+/]
  query(`amixer get '#{@control}'`)

end

Public Instance Methods

fade(raw_val, interval: @fade_interval) click to toggle source

fades the volume up or down to the volume percentage

# File lib/amixer2019.rb, line 20
def fade(raw_val, interval: @fade_interval)

  val = raw_val.to_i
  return 'volume must be between 0 and 100' if val < 0 or val > 100
 
  @volume.method(val > @volume ? :upto : :downto).call(val.to_i).each do |x|
    sleep interval; setvol(x.to_s + '%')
  end

  @volume

end

mute() click to toggle source

# File lib/amixer2019.rb, line 33
def mute()        sset 'mute'      end

muted?() click to toggle source

# File lib/amixer2019.rb, line 34
def muted?()      @muted           end

toggle() click to toggle source

# File lib/amixer2019.rb, line 35
def toggle()      sset 'toggle'    end

unmute() click to toggle source

# File lib/amixer2019.rb, line 36
def unmute()      sset 'unmute'    end

vol()

Alias for: volume

vol=(val)

Alias for: volume=

vol_down() click to toggle source

# File lib/amixer2019.rb, line 37
def vol_down()    setvol(-@notch)  end

vol_up() click to toggle source

# File lib/amixer2019.rb, line 38
def vol_up()      setvol(+@notch)  end

volume() click to toggle source

# File lib/amixer2019.rb, line 39
def volume()      @volume          end

Also aliased as: vol

volume=(val) click to toggle source

# File lib/amixer2019.rb, line 40
def volume=(val)  setvol(val)      end

Also aliased as: vol=

Private Instance Methods

query(r) click to toggle source

# File lib/amixer2019.rb, line 63
def query(r)

  puts 'r: ' + r.inspect if @debug
  h = r.match(/(?<volume>\d+)%\] .*\[(?<toggle>on|off)\]/)
  @volume = h[:volume].to_i
  @muted = h[:toggle] == 'off'

end

setvol(val) click to toggle source

# File lib/amixer2019.rb, line 51
def setvol(val)

  return sset(val) if val.is_a?(String) and val =~ /%$/

  if val.to_i + @volume >= 0 and val.to_i + @volume <= 100 then
    sset("%s%%" % [@volume + val.to_i])
  else
    @volume
  end

end

sset(switch) click to toggle source

# File lib/amixer2019.rb, line 47
def sset(switch)
  query(`amixer sset #{@control} #{switch}`)
end