Changes

→‎Known issues: add tts example
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   pipe.set_state(gst.STATE_PLAYING)<br>
 
   pipe.set_state(gst.STATE_PLAYING)<br>
 
   gtk.main()
 
   gtk.main()
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== Simple TTS example ==
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import gtk
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import gst
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import pango
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window = gtk.Window()
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window.connect('destroy',
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        lambda sender: gtk.main_quit())
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workspace = gtk.VBox()
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window.add(workspace)
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# text widget
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scrolled = gtk.ScrolledWindow()
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workspace.pack_start(scrolled)
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text = gtk.TextView()
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scrolled.add(text)
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buffer = text.props.buffer
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buffer.props.text = file(__file__).read()
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tag = buffer.create_tag()
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tag.props.weight = pango.WEIGHT_BOLD
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# play controls
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toolbar = gtk.HBox()
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workspace.pack_end(toolbar, False)
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play = gtk.Button('Play/Resume')
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play.connect('clicked',
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        lambda sender: pipe.set_state(gst.STATE_PLAYING))
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toolbar.add(play)
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pause = gtk.Button('Pause')
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pause.connect('clicked',
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        lambda sender: pipe.set_state(gst.STATE_PAUSED))
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toolbar.add(pause)
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stop = gtk.Button('Stop')
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stop.connect('clicked',
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        lambda sender: pipe.set_state(gst.STATE_NULL))
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toolbar.add(stop)
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# gst code
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pipe = gst.parse_launch('espeak name=src ! autoaudiosink')
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src = pipe.get_by_name('src')
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src.props.text = buffer.props.text
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src.props.track = 1 # track for words
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def tts_cb(bus, message):
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    if message.structure.get_name() != 'espeak-word':
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        return
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    offset = message.structure['offset']
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    len = message.structure['len']
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    buffer.remove_tag(tag, buffer.get_start_iter(), buffer.get_end_iter())
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    start = buffer.get_iter_at_offset(offset)
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    end = buffer.get_iter_at_offset(offset + len)
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    buffer.apply_tag(tag, start, end)
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bus = pipe.get_bus()
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bus.add_signal_watch()
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bus.connect('message::element', tts_cb)
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# gtk start
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window.show_all()
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gtk.main()
    
== Known issues ==
 
== Known issues ==