sample_wave.py

#!/usr/bin/env python2.7
import houndify
import sys
import time
import wave


  
CLIENT_ID = sys.argv[1]
CLIENT_KEY = sys.argv[2]
AUDIO_FILE = sys.argv[3]
BUFFER_SIZE = 512

#
# Simplest HoundListener; just print out what we receive.
# You can use these callbacks to interact with your UI.
#
class MyListener(houndify.HoundListener):
  def onPartialTranscript(self, transcript):
    print "Partial transcript: " + transcript
  def onFinalResponse(self, response):
    print "Final response: " + str(response)
  def onError(self, err):
    print "Error: " + str(err)


client = houndify.StreamingHoundClient(CLIENT_ID, CLIENT_KEY, "test_user")
client.setLocation(37.388309, -121.973968)

## Uncomment the lines below to see an example of using a custom
## grammar for matching.  Use the file 'turnthelightson.wav' to try it.
# clientMatches = [ {
#   "Expression" : '([1/100 ("can"|"could"|"will"|"would")."you"].[1/10 "please"].("turn"|"switch"|(1/100 "flip"))."on".["the"].("light"|"lights").[1/20 "for"."me"].[1/20 "please"])|([1/100 ("can"|"could"|"will"|"would")."you"].[1/10 "please"].[100 ("turn"|"switch"|(1/100 "flip"))].["the"].("light"|"lights")."on".[1/20 "for"."me"].[1/20 "please"])|((("i".("want"|"like"))|((("i".["would"])|("i\'d")).("like"|"want"))).["the"].("light"|"lights").["turned"|"switched"|("to"."go")|(1/100"flipped")]."on".[1/20"please"])"',
#   "Result" : { "Intent" : "TURN_LIGHT_ON" },
#   "SpokenResponse" : "Ok, I\'m turning the lights on.",
#   "SpokenResponseLong" : "Ok, I\'m turning the lights on.",
#   "WrittenResponse" : "Ok, I\'m turning the lights on.",
#   "WrittenResponseLong" : "Ok, I\'m turning the lights on."
# } ]
# client.setHoundRequestInfo('ClientMatches', clientMatches)


audio = wave.open(AUDIO_FILE)
if audio.getsampwidth() != 2:
  print "%s: wrong sample width (must be 16-bit)" % fname
if audio.getframerate() != 8000 and audio.getframerate() != 16000:
  print "%s: unsupported sampling frequency (must be either 8 or 16 khz)" % fname
if audio.getnchannels() != 1:
  print "%s: must be single channel (mono)" % fname

client.setSampleRate(audio.getframerate())
client.start(MyListener())

while True:
  samples = audio.readframes(BUFFER_SIZE)
  if len(samples) == 0: break
  if client.fill(samples): break
  time.sleep(0.032) # simulate real-time so we can see the partial transcripts
       
result = client.finish() # returns either final response or error