mpris経由でPlayerを色々するサンプル

mpris2twitter.rb

#!/usr/bin/ruby -w
# -*- coding: utf-8 -*-
require 'dbus'
require 'twitter'
require 'rubygems'

# mpris
# see the specification
#   http://specifications.freedesktop.org/mpris-spec/latest/

service_name = ''

# get dbus instance
dbus = DBus::SessionBus.instance

# get service name of mpris player
dbus.proxy.ListNames[0].each{|s|
  if s =~ /^org.mpris/
    service_name = s
    break
  end
}

# get service
service = dbus.service(service_name)

# mpris player object
player = service.object('/org/mpris/MediaPlayer2')

# introspect
begin
  player.introspect
rescue => e
  puts "Rhythmbox or other mpris player is not running."
  exit 1
end

# get interface and set default interface on bus
iface = player["org.freedesktop.DBus.Properties"]
player.default_iface = "org.freedesktop.DBus.Properties"

# catch the signal "PropertiesChanged"
player.on_signal("PropertiesChanged") {|i,property|

  if !property.key?("Metadata") || !property.key?("PlaybackStatus")
    next
  end
  if property["PlaybackStatus"] == "Stopped"
    next
  end

  # Metadata: http://www.freedesktop.org/wiki/Specifications/mpris-spec/metadata
  meta = property["Metadata"]
  album = meta["xesam:album"]
  trackNumber = meta["xesam:trackNumber"]
  title = meta["xesam:title"]
  length = meta["mpris:length"]

  artist = ""
  if meta["xesam:artist"].instance_of?(Array)
    meta["xesam:artist"].each{|v|
      artist += v
    }
  end

  albumArtist = ""
  if meta["xesam:artist"].instance_of?(Array)
    meta["xesam:artist"].each{|v|
      albumArtist += v
    }
  end

  unless length.nil?
    t = Time.local(2000, 1, 1, 0, 0, 0, 0)
    t += length.div(1000000)
    length = t.strftime("%-M:%S")
  end

  post = "I'm listening to #{title} by #{artist} on #{album} (#{length}) ♪ #nowplaying".force_encoding("UTF-8")
  # cut strings when strings to post is over 140
  if post.length > 140
    post = post.slice(0, 137) + '...'
  end

  ENV["SSL_CERT_FILE"] = "/etc/ssl/certs/ca-bundle.crt"

  # Post twitter
  Twitter.configure {|c|
    c.consumer_key = ''
    c.consumer_secret = ''
    c.oauth_token = ''
    c.oauth_token_secret = ''
  }
  client = Twitter::Client.new
  client.update(post)
}

loop = DBus::Main.new
loop << dbus
loop.run

mpris_sample.rb

#!/usr/bin/ruby -w
require 'dbus'
require 'rubygems'

# mpris
# see the specification
#   http://specifications.freedesktop.org/mpris-spec/latest/

service_name = ''

# get dbus instance
dbus = DBus::SessionBus.instance

# get service name of mpris player
dbus.proxy.ListNames[0].each{|s|
  if s =~ /^org.mpris/
    service_name = s
    break
  end
}

# get service
service = dbus.service(service_name)

# mpris player object
player = service.object('/org/mpris/MediaPlayer2')

# introspect
player.introspect

# get interface
iface = player["org.mpris.MediaPlayer2.Player"]

# get metadata
iface["Metadata"].each{|k,v|
  print k,v,"\n"
}

# play next song 
iface.Next