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# This is part of Blather
# -- this code is licensed GPLv3
# Copyright 2013 Jezra
import gi
gi.require_version('Gst', '1.0')
from gi.repository import GObject, Gst
GObject.threads_init()
Gst.init(None)
import os.path
import sys
# Define some global variables
this_dir = os.path.dirname( os.path.abspath(__file__) )
class Recognizer(GObject.GObject):
__gsignals__ = {
'finished' : (GObject.SIGNAL_RUN_LAST, GObject.TYPE_NONE, (GObject.TYPE_STRING,))
}
def __init__(self, language_file, dictionary_file, src = None):
GObject.GObject.__init__(self)
self.commands = {}
if src:
audio_src = 'alsasrc device="hw:%d,0"' % (src)
else:
audio_src = 'autoaudiosrc'
# Build the pipeline
cmd = audio_src+' ! audioconvert ! audioresample ! pocketsphinx name=asr ! appsink sync=false'
try:
self.pipeline=Gst.parse_launch( cmd )
except Exception, e:
print e.message
print "You may need to install gstreamer1.0-pocketsphinx"
raise e
bus = self.pipeline.get_bus()
bus.add_signal_watch()
# Get the Auto Speech Recognition piece
asr=self.pipeline.get_by_name('asr')
bus.connect('message::element', self.result)
asr.set_property('lm', language_file)
asr.set_property('dict', dictionary_file)
asr.set_property('configured', True)
def listen(self):
self.pipeline.set_state(Gst.State.PLAYING)
def pause(self):
self.pipeline.set_state(Gst.State.PAUSED)
def result(self, bus, msg):
msg_struct = msg.get_structure()
# Ignore messages that aren't from pocketsphinx
msgtype = msg_struct.get_name()
if msgtype != 'pocketsphinx':
return
# If we have a final command, send it for processing
command = msg_struct.get_string('hypothesis')
if command != '' and msg_struct.get_boolean('final')[1]:
self.emit("finished", command)
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