Control a mplayer slave within ruby

mplayer.rb

## Mplayer controlling class
#
# Initialize with music file
# Good Slave reference:
# https://github.com/CodeMonkeySteve/ruby-mplayer/blob/master/docs/mplayer-slave.txt
#
# License: WTFPL
#
class MPlayer

	# Helper function
	def is_numeric?(s)
		  !!Float(s) rescue false
	end

	def initialize file
		@player = IO.popen("mplayer -quiet -noconsolecontrols -nolirc -idle -slave #{file}", "w+")
		# Forward intro text
		get = @player.gets
		while !get.include? 'Starting playback...'
			get = @player.gets
		end
		
		@paused = false
		@muted  = false
	end

	def gets
		out = @player.gets
		while out.chomp == "" or out.include? "\r\e"
			out = @player.gets
		end
		out
	end

	# pause
	# none|true|false (none toggles)
	def pause val = nil
		if val == true
			(@player.puts "pause"; @paused = true ) if @paused == false
		elsif val == false
			(@player.puts "pause"; @paused = false) if @paused
		else
			if @paused == true; @paused = false; else; @paused = true; end
			@player.puts "pause"
		end
	end

	# mute true|false
	def mute val = true
		@muted = val
		val = 1 if val == true
		val = 0 if val == false
		@player.puts "mute #{val}"
	end

	# seek
	def seek val
		if self.is_numeric? val
			@player.puts "seek #{val}"
		end
	end

	# speed
	def speed val
		if self.is_numeric? val
			@player.puts "speed_set #{val}"
		end
	end

	# volume
	# NUM|:up|:down
	def volume val
		if self.is_numeric? val
			@player.puts "volume #{val} 1"
		else
			@player.puts "volume -1" if val == :down
			@player.puts "volume 1"  if val == :up
		end
	end

	# quit player
	def quit
		@player.puts "quit"
	end

	# load file (quits current)
	def load file, append = false
		if append
			@player.puts "loadfile #{file} 1" if File.exists? file
		else
			@player.puts "loadfile #{file}" if File.exists? file
		end
	end

	# current playing filename
	def filename
		@player.puts "get_file_name"
		self.gets.chomp
	end

	# current playing title
	def title
		@player.puts "get_meta_title"
		self.gets.chomp
	end

	# get length
	def length
		@player.puts "get_time_length"
		self.gets.chomp().split("=")[1].to_f
	end

 	# get current position
	def position
		@player.puts "get_time_pos"
		self.gets.chomp().split("=")[1].to_f
	end

end