Notices

#!/usr/bin/env python

#
# A small script to learn and play with python, dbus,
# mediaplayer and FM RDS
#
# Author: Mirakels (marcel@mesa.nl)
# Date: april 2010
# 
# Setup dbus connections to mediaplayer en FMTx. Wait for 
# signals from mediaplyer and use them to show info on your
# RDS capable audio system. It uses the RDS station name to
# show the artist, and the RDS text field to show album and
# title info of te current song.
#
# Note that mediaplayer also sets RDS when the FM transmitter
# is enabled (at least it does so in PR 1.1.1). But it shows
# artist/album/title as the RDS station name. This will be
# 'overwritten' by this script.
#
# Just run this script in the background from an xterm:
#
#      $ ./mp_rds.py &
#
# When you enable the FM transmitter in mediaplayer 
# RDS messages will be send to your radio...
#

import gobject, dbus
from dbus.mainloop.glib import DBusGMainLoop

album  = ""
title = ""

#
# Just some console fun to see what mediaplayer is doing
#
def handle_state(state):
    if (state == 0):
        print "Media player stopped"
    elif (state == 1):
        print "Media player start playing"
    elif (state == 2):
        print "Media player paused"
    elif (state == 3):
        print "Media player transitioning"
    else: 
        print "Media player unknown state %d" % state
        
#
# Set RDS info based on mediaplayer tag info
#
def handle_meta(meta, state, data):
    # print "meta change meta=%s, state=%d data=%s" % (meta, state, data)
    global album
    global title
    if (meta == "artist"):
        artist = data
        fmtx_iface.Set("com.nokia.FMTx.Device", "rds_ps", dbus.String(u'%s' % data , variant_level=1))
    if (meta == "title"):
        title = data
        info = title + ' / ' + album
        fmtx_iface.Set("com.nokia.FMTx.Device", "rds_text", dbus.String(u'%s' % info , variant_level=1))
    if (meta == "album"):
        album = data
        info = title + ' / ' + album
        fmtx_iface.Set("com.nokia.FMTx.Device", "rds_text", dbus.String(u'%s' % info , variant_level=1))
        

DBusGMainLoop(set_as_default=True)
#
# Connect to mediaplayer
#
bus = dbus.SessionBus()
bus.add_signal_receiver(handle_state, path='/com/nokia/mafw/renderer/gstrenderer', dbus_interface='com.nokia.mafw.renderer', signal_name='state_changed')
bus.add_signal_receiver(handle_meta,  path='/com/nokia/mafw/renderer/gstrenderer', dbus_interface='com.nokia.mafw.renderer', signal_name='metadata_changed')

#
# Create connection to FM transmitter
#
sysbus = dbus.SystemBus()
fmtx = sysbus.get_object('com.nokia.FMTx', '/com/nokia/fmtx/default', False)
fmtx_iface = dbus.Interface(fmtx, dbus_interface='org.freedesktop.DBus.Properties')

gobject.MainLoop().run()

#
# The End
#