# ====================================================================
# Copyright (c) 2013 Carnegie Mellon University.  All rights
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# This work was supported in part by funding from the Defense Advanced 
# Research Projects Agency and the National Science Foundation of the 
# United States of America, and the CMU Sphinx Speech Consortium.
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# ====================================================================


import sys, os
from pocketsphinx.pocketsphinx import *
from sphinxbase.sphinxbase import *


modeldir = "../../../model"
datadir = "../../../test/data"

# Create a decoder with certain model
config = Decoder.default_config()
config.set_string('-hmm', os.path.join(modeldir, 'en-us/en-us'))
config.set_string('-dict', os.path.join(modeldir, 'en-us/cmudict-en-us.dict'))
config.set_string('-keyphrase', 'forward')
config.set_float('-kws_threshold', 1e+20)


# Open file to read the data
stream = open(os.path.join(datadir, "goforward.raw"), "rb")

# Alternatively you can read from microphone
# import pyaudio
# 
# p = pyaudio.PyAudio()
# stream = p.open(format=pyaudio.paInt16, channels=1, rate=16000, input=True, frames_per_buffer=1024)
# stream.start_stream()

# Process audio chunk by chunk. On keyword detected perform action and restart search
decoder = Decoder(config)
decoder.start_utt()
while True:
    buf = stream.read(1024)
    if buf:
         decoder.process_raw(buf, False, False)
    else:
         break
    if decoder.hyp() != None:
        print ([(seg.word, seg.prob, seg.start_frame, seg.end_frame) for seg in decoder.seg()])
        print ("Detected keyword, restarting search")
        decoder.end_utt()
        decoder.start_utt()