added demo4.py

examples/Python3/demo4.py

@@ -0,0 +1,69 @@
+import snowboydecoder
+import sys
+import signal
+import speech_recognition as sr
+import os
+
+"""
+This demo file shows you how to use the new_message_callback to interact with
+the recorded audio after a keyword is spoken. It leverages the
+speech_recognition library in order to convert the recorded audio into text.
+"""
+
+
+interrupted = False
+
+
+def newMessageCallback(fname):
+    print("converting audio to text")
+    r = sr.Recognizer()
+    with sr.AudioFile(fname) as source:
+        audio = r.record(source)  # read the entire audio file
+    # recognize speech using Google Speech Recognition
+    try:
+        # for testing purposes, we're just using the default API key
+        # to use another API key, use `r.recognize_google(audio, key="GOOGLE_SPEECH_RECOGNITION_API_KEY")`
+        # instead of `r.recognize_google(audio)`
+        print(r.recognize_google(audio))
+    except sr.UnknownValueError:
+        print("Google Speech Recognition could not understand audio")
+    except sr.RequestError as e:
+        print("Could not request results from Google Speech Recognition service; {0}".format(e))
+
+    os.remove(fname)
+
+
+
+def detectedCallback():
+  print('recording audio...', end='', flush=True)
+
+def signal_handler(signal, frame):
+    global interrupted
+    interrupted = True
+
+
+def interrupt_callback():
+    global interrupted
+    return interrupted
+
+if len(sys.argv) == 1:
+    print("Error: need to specify model name")
+    print("Usage: python demo.py your.model")
+    sys.exit(-1)
+
+model = sys.argv[1]
+
+# capture SIGINT signal, e.g., Ctrl+C
+signal.signal(signal.SIGINT, signal_handler)
+
+detector = snowboydecoder.HotwordDetector(model, sensitivity=0.38)
+print('Listening... Press Ctrl+C to exit')
+
+# main loop
+detector.start(detected_callback=detectedCallback, new_message_callback=newMessageCallback, interrupt_check=interrupt_callback, sleep_time=0.01)
+
+detector.terminate()
+
+
+
+