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# Copyright (C) 2011 One Laptop Per Child
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
import os
import logging
import gconf
import gst
import gtk
import gobject
DEFAULT_PITCH = 0
DEFAULT_RATE = 0
_speech_manager = None
class SpeechManager(gobject.GObject):
__gtype_name__ = 'SpeechManager'
__gsignals__ = {
'play': (gobject.SIGNAL_RUN_FIRST, None, []),
'pause': (gobject.SIGNAL_RUN_FIRST, None, []),
'stop': (gobject.SIGNAL_RUN_FIRST, None, [])
}
MIN_PITCH = -100
MAX_PITCH = 100
MIN_RATE = -100
MAX_RATE = 100
def __init__(self, **kwargs):
gobject.GObject.__init__(self, **kwargs)
self._player = _GstSpeechPlayer()
self._player.connect('play', self._update_state, 'play')
self._player.connect('stop', self._update_state, 'stop')
self._player.connect('pause', self._update_state, 'pause')
self._voice_name = self._player.get_default_voice()
self._pitch = DEFAULT_PITCH
self._rate = DEFAULT_RATE
self._is_playing = False
self._is_paused = False
self.restore()
def _update_state(self, player, signal):
self._is_playing = (signal == 'play')
self._is_paused = (signal == 'pause')
self.emit(signal)
def get_is_playing(self):
return self._is_playing
is_playing = gobject.property(type=bool, getter=get_is_playing,
setter=None, default=False)
def get_is_paused(self):
return self._is_paused
is_paused = gobject.property(type=bool, getter=get_is_paused,
setter=None, default=False)
def get_pitch(self):
return self._pitch
def get_rate(self):
return self._rate
def set_pitch(self, pitch):
self._pitch = pitch
self.save()
def set_rate(self, rate):
self._rate = rate
self.save()
def say_text(self, text):
if text:
self._player.speak(self._pitch, self._rate, self._voice_name, text)
def say_selected_text(self):
clipboard = gtk.clipboard_get(selection='PRIMARY')
clipboard.request_text(self.__primary_selection_cb)
def pause(self):
self._player.pause_sound_device()
def restart(self):
self._player.restart_sound_device()
def stop(self):
self._player.stop_sound_device()
def __primary_selection_cb(self, clipboard, text, user_data):
self.say_text(text)
def save(self):
client = gconf.client_get_default()
client.set_int('/desktop/sugar/speech/pitch', self._pitch)
client.set_int('/desktop/sugar/speech/rate', self._rate)
logging.debug('saving speech configuration pitch %s rate %s',
self._pitch, self._rate)
def restore(self):
client = gconf.client_get_default()
self._pitch = client.get_int('/desktop/sugar/speech/pitch')
self._rate = client.get_int('/desktop/sugar/speech/rate')
logging.debug('loading speech configuration pitch %s rate %s',
self._pitch, self._rate)
class _GstSpeechPlayer(gobject.GObject):
__gsignals__ = {
'play': (gobject.SIGNAL_RUN_FIRST, None, []),
'pause': (gobject.SIGNAL_RUN_FIRST, None, []),
'stop': (gobject.SIGNAL_RUN_FIRST, None, [])
}
def __init__(self):
gobject.GObject.__init__(self)
self._pipeline = None
def restart_sound_device(self):
if self._pipeline is None:
logging.debug('Trying to restart not initialized sound device')
return
self._pipeline.set_state(gst.STATE_PLAYING)
self.emit('play')
def pause_sound_device(self):
if self._pipeline is None:
return
self._pipeline.set_state(gst.STATE_PAUSED)
self.emit('pause')
def stop_sound_device(self):
if self._pipeline is None:
return
self._pipeline.set_state(gst.STATE_NULL)
self.emit('stop')
def make_pipeline(self, command):
if self._pipeline is not None:
self.stop_sound_device()
del self._pipeline
self._pipeline = gst.parse_launch(command)
bus = self._pipeline.get_bus()
bus.add_signal_watch()
bus.connect('message', self.__pipe_message_cb)
def __pipe_message_cb(self, bus, message):
if message.type == gst.MESSAGE_EOS:
self._pipeline.set_state(gst.STATE_NULL)
self.emit('stop')
elif message.type == gst.MESSAGE_ERROR:
self._pipeline.set_state(gst.STATE_NULL)
self.emit('stop')
def speak(self, pitch, rate, voice_name, text):
# TODO workaround for http://bugs.sugarlabs.org/ticket/1801
if not [i for i in text if i.isalnum()]:
return
self.make_pipeline('espeak name=espeak ! autoaudiosink')
src = self._pipeline.get_by_name('espeak')
src.props.text = text
src.props.pitch = pitch
src.props.rate = rate
src.props.voice = voice_name
src.props.track = 2 # track for marks
self.restart_sound_device()
def get_all_voices(self):
all_voices = {}
for voice in gst.element_factory_make('espeak').props.voices:
name, language, dialect = voice
if dialect != 'none':
all_voices[language + '_' + dialect] = name
else:
all_voices[language] = name
return all_voices
def get_default_voice(self):
"""Try to figure out the default voice, from the current locale ($LANG)
Fall back to espeak's voice called Default."""
voices = self.get_all_voices()
locale = os.environ.get('LANG', '')
language_location = locale.split('.', 1)[0].lower()
language = language_location.split('_')[0]
# if the language is es but not es_es default to es_la (latin voice)
if language == 'es' and language_location != 'es_es':
language_location = 'es_la'
best = voices.get(language_location) or voices.get(language) \
or 'default'
logging.debug('Best voice for LANG %s seems to be %s',
locale, best)
return best
def get_speech_manager():
global _speech_manager
if _speech_manager is None:
_speech_manager = SpeechManager()
return _speech_manager
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