wake_word_detection.py

import pvporcupine
import pyaudio
import struct
from config import PICOVOICE_ACCESS_KEY


def detect_wake_word():
    porcupine = None
    pa = None
    audio_stream = None

    try:
        porcupine = pvporcupine.create(
            access_key=PICOVOICE_ACCESS_KEY,
            keywords=["hey google"]
        )
        pa = pyaudio.PyAudio()
        audio_stream = pa.open(
            rate=porcupine.sample_rate,
            channels=1,
            format=pyaudio.paInt16,
            input=True,
            frames_per_buffer=porcupine.frame_length
        )
        print("Listening for 'Hey Google'...")

        while True:
            pcm = audio_stream.read(porcupine.frame_length)
            pcm = struct.unpack_from("h" * porcupine.frame_length, pcm)
            keyword_index = porcupine.process(pcm)
            if keyword_index >= 0:
                print("Wake word detected")
                return True

    except Exception as e:
        print(f"An error occurred: {e}")
    finally:
        if porcupine is not None:
            porcupine.delete()
        if audio_stream is not None:
            audio_stream.close()
        if pa is not None:
            pa.terminate()