Somewhat fancy voice command recognition software
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recognizer.py 2.0KB

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  1. # This is part of Kaylee
  2. # -- this code is licensed GPLv3
  3. # Copyright 2013 Jezra
  4. # Copyright 2015 Clayton G. Hobbs
  5. import gi
  6. gi.require_version('Gst', '1.0')
  7. from gi.repository import GObject, Gst
  8. GObject.threads_init()
  9. Gst.init(None)
  10. import os.path
  11. import sys
  12. # Define some global variables
  13. this_dir = os.path.dirname( os.path.abspath(__file__) )
  14. class Recognizer(GObject.GObject):
  15. __gsignals__ = {
  16. 'finished' : (GObject.SIGNAL_RUN_LAST, GObject.TYPE_NONE, (GObject.TYPE_STRING,))
  17. }
  18. def __init__(self, language_file, dictionary_file, src = None):
  19. GObject.GObject.__init__(self)
  20. self.commands = {}
  21. if src:
  22. audio_src = 'alsasrc device="hw:%d,0"' % (src)
  23. else:
  24. audio_src = 'autoaudiosrc'
  25. # Build the pipeline
  26. cmd = audio_src+' ! audioconvert ! audioresample ! pocketsphinx name=asr ! appsink sync=false'
  27. try:
  28. self.pipeline=Gst.parse_launch( cmd )
  29. except Exception, e:
  30. print e.message
  31. print "You may need to install gstreamer1.0-pocketsphinx"
  32. raise e
  33. bus = self.pipeline.get_bus()
  34. bus.add_signal_watch()
  35. # Get the Auto Speech Recognition piece
  36. asr=self.pipeline.get_by_name('asr')
  37. bus.connect('message::element', self.result)
  38. asr.set_property('lm', language_file)
  39. asr.set_property('dict', dictionary_file)
  40. asr.set_property('configured', True)
  41. def listen(self):
  42. self.pipeline.set_state(Gst.State.PLAYING)
  43. def pause(self):
  44. self.pipeline.set_state(Gst.State.PAUSED)
  45. def result(self, bus, msg):
  46. msg_struct = msg.get_structure()
  47. # Ignore messages that aren't from pocketsphinx
  48. msgtype = msg_struct.get_name()
  49. if msgtype != 'pocketsphinx':
  50. return
  51. # If we have a final command, send it for processing
  52. command = msg_struct.get_string('hypothesis')
  53. if command != '' and msg_struct.get_boolean('final')[1]:
  54. self.emit("finished", command)