def __init__(self, proxy):
if not EspeakDriver._moduleInitialized:
# espeak cannot initialize more than once per process and has
# issues when terminating from python (assert error on close)
# so just keep it alive and init once
rate = _espeak.Initialize(_espeak.AUDIO_OUTPUT_PLAYBACK, 1000)
if rate == -1:
raise RuntimeError('could not initialize espeak')
EspeakDriver._defaultVoice = self.getProperty('voice')
EspeakDriver._moduleInitialized = True
_espeak.SetSynthCallback(self._onSynth)
# make sure all props reset
self.setProperty('voice', EspeakDriver._defaultVoice)
self.setProperty('rate', 200)
self.setProperty('volume', 1.0)
self._proxy = proxy
self._looping = True
self._stopping = False
def destroy(self):
_espeak.SetSynthCallback(None)
