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# Copyright (C) 2006, 2007, 2008 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., 675 Mass Ave, Cambridge, MA 02139, USA.
#
import gst
import logging
_logger = logging.getLogger('memorize-activity')
class Audio(object):
def __init__(self):
self._player = gst.element_factory_make('playbin', 'player')
fakesink = gst.element_factory_make('fakesink', 'my-fakesink')
self._player.set_property('video-sink', fakesink)
self._playing = None
bus = self._player.get_bus()
bus.add_signal_watch()
bus.connect('message', self._gstmessage_cb)
def play(self, filename=None):
if filename:
_logger.debug('play audio %s' % filename)
self._player.set_property('uri', 'file://' + filename)
self._player.set_state(gst.STATE_NULL)
elif self._playing == None:
return
else:
_logger.debug('continue audio')
self._player.set_state(gst.STATE_PLAYING)
self._playing = True
def pause(self):
if self._playing != None:
_logger.debug('pause audio')
self._player.set_state(gst.STATE_PAUSED)
self._playing = False
def stop(self):
self._player.set_state(gst.STATE_NULL)
def _gstmessage_cb(self, bus, message):
message_type = message.type
if message_type in (gst.MESSAGE_EOS, gst.MESSAGE_ERROR):
self._player.set_state(gst.STATE_NULL)
self._playing = None
_logger.debug('audio stoped with type %d' % message_type)
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