Class: Player

Inherits:
Object
  • Object
show all
Defined in:
lib/mdisc/player.rb

Constant Summary collapse

WAIT_TIME = 
0.5

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Player

Returns a new instance of Player.



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# File 'lib/mdisc/player.rb', line 8

def initialize
  self.ui = Ui.new
  @datatype = 'songs'
  @mpg123_thread = nil
  @mpg123_pid = nil
  @playing_flag = false
  @pause_flag = false
  @songs = []
  @idx = 0
  @carousel = ->(left, right, x){x < left ? right : (x > right ? left : x)}
end

Instance Attribute Details

#ui ⇒ Object

Returns the value of attribute ui.



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# File 'lib/mdisc/player.rb', line 6

def ui
  @ui
end

Instance Method Details

#next ⇒ Object 



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# File 'lib/mdisc/player.rb', line 85

def next
  stop
  sleep WAIT_TIME

  @idx = @carousel[0, @songs.size - 1, @idx + 1]
  recall
end

#pause ⇒ Object 



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# File 'lib/mdisc/player.rb', line 67

def pause
  @pause_flag = true
  # send SIGSTOP to pipe
  Process.kill(:SIGSTOP, @mp3id)

  item = @songs[@idx]
  ui.build_playinfo(item['song_name'], item['artist'], true)
end

#play(datatype, songs, idx, switch_flag = false) ⇒ Object 



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# File 'lib/mdisc/player.rb', line 38

def play(datatype, songs, idx, switch_flag = false)
  @datatype = datatype

  if !switch_flag
    @pause_flag ? resume : pause if @playing_flag
  elsif switch_flag
    @songs = songs
    @idx = idx
    @playing_flag ? switch : recall
  end
end

#prev ⇒ Object 



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# File 'lib/mdisc/player.rb', line 93

def prev
  stop
  sleep WAIT_TIME

  @idx = @carousel[0, @songs.size - 1, @idx - 1]
  recall
end

#recall ⇒ Object 



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# File 'lib/mdisc/player.rb', line 20

def recall
  @playing_flag = true
  @pause_flag = false

  item = @songs[@idx]
  ui.build_playinfo(item['song_name'], item['artist'])

  @thread = Thread.new do
    @mp3id, stdin, stdout, stderr = Open4::popen4('mpg123', item['mp3_url'])
    Process::waitpid2 @mp3id

    if @playing_flag
      @idx = @carousel[0, @songs.size - 1, @idx + 1]
      recall
    end
  end
end

#resume ⇒ Object 



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# File 'lib/mdisc/player.rb', line 76

def resume
  @pause_flag = false
  # send SIGCONT to pipe
  Process.kill(:SIGCONT, @mp3id)

  item = @songs[@idx]
  ui.build_playinfo(item['song_name'], item['artist'])
end

#stop ⇒ Object 



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# File 'lib/mdisc/player.rb', line 56

def stop
  return unless @playing_flag
  return unless @thread
  return unless @mp3id

  @playing_flag = false
  # kill this process and thread
  Process.kill(:SIGKILL, @mp3id)
  Thread.kill @thread
end

#switch ⇒ Object 



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# File 'lib/mdisc/player.rb', line 50

def switch
  stop
  sleep WAIT_TIME
  recall
end