class NativePocketSphinx(QObject):
recognizedToFile = QtCore.pyqtSignal(str)
def __init__(self):
super().__init__()
logger.info("Initializing PocketSphinx backend")
self.ps = PocketSphinx()
logger.debug("Initializing PocketSphinx decoder")
self.ps.initializeDecoder()
logger.debug("Initializing audio recording")
self.ps.initializeAudio()
self.contWorker = ContinuousAsrWorker()
self.workerThread = QThread(self)
self.workerThread.started.connect(self.contWorker.start)
self.workerThread.finished.connect(self.contWorker.deleteLater)
self.contWorker.moveToThread(self.workerThread)
def recognizeFromMicrophone(self, sinkFileName):
self.ps.recognizeFromMicrophone(sinkFileName)
self.recognizedToFile.emit(sinkFileName)
# This returns an iterator for n file names following some naming schema
def fileNamesRange(self, n, stem="hyp"):
for i in range(1, n+1):
yield stem + str(i)
#TODO: Write a solution for continuous recognition
# Location of written files (and naming schema) should be governed by
# a configuration manager
# This will probably need a separate thread (QThread to be used)
# FIXME: We should probably shut down the main PS instance to avoid conflicts
# between it and the worker
def startContinuousRecognition(self):
logger.info("Starting continuous speech recognition")
self.workerThread.start()
def stopContinuousRecognition(self):
logger.info("Stopping continuous speech recognition")
self.workerThread.quit()
@classmethod
def supported():
return True
class ContinuousAsrWorker(QObject):
def __init__(self):
super().__init__()
self.ps = None
self.finish = False
@pyqtSlot()
def start(self):
logger.debug("Continuous ASR worker starts")
logger.info("Initializing PocketSphinx backend")
self.ps = PocketSphinx()
logger.debug("Initializing PocketSphinx decoder")
self.ps.initializeDecoder()
logger.debug("Initializing audio recording")
self.ps.initializeAudio()
continuousSinkFileNameBase = SC_SHARE_PATH + '/contrecog/utts/hyp'
i = 1
while not self.finish:
self.ps.recognizeFromMicrophone(continuousSinkFileNameBase + str(i))
i += 1