79 lines
2.3 KiB
Python
79 lines
2.3 KiB
Python
"""
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.. moduleauthor:: Fabio Manganiello <blacklight86@gmail.com>
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.. license:: MIT
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"""
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import json
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import os
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import subprocess
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import time
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from platypush.backend import Backend
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from platypush.message.event.assistant import \
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ConversationStartEvent, ConversationEndEvent, \
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SpeechRecognizedEvent, HotwordDetectedEvent
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class AssistantSnowboyBackend(Backend):
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"""
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Backend for detecting custom voice hotwords through Snowboy. The purpose of
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this component is only to detect the hotword specified in your Snowboy voice
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model. If you want to trigger proper assistant conversations or custom
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speech recognition, you should create a hook in your configuration on
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HotwordDetectedEvent to trigger the conversation on whichever assistant
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plugin you're using (Google, Alexa...)
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Triggers:
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* :class:`platypush.message.event.assistant.HotwordDetectedEvent` whenever the hotword has been detected
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Requires:
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* **snowboy** (``pip install snowboy``)
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"""
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def __init__(self, voice_model_file, hotword=None, sensitivity=0.5,
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audio_gain=1.0, **kwargs):
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"""
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:param voice_model_file: Snowboy voice model file - see https://snowboy.kitt.ai/
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:type voice_model_file: str
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:param hotword: Name of the hotword
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:type hotword: str
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:param sensitivity: Hotword recognition sensitivity, between 0 and 1
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:type sensitivity: float
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:param audio_gain: Audio gain, between 0 and 1
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:type audio_gain: float
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"""
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from snowboy import snowboydecoder
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super().__init__(**kwargs)
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self.voice_model_file = voice_model_file
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self.hotword = hotword
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self.sensitivity = sensitivity
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self.audio_gain = audio_gain
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self.detector = snowboydecoder.HotwordDetector(
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self.voice_model_file, sensitivity=self.sensitivity,
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audio_gain=self.audio_gain)
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self.logger.info('Initialized Snowboy hotword detection')
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def hotword_detected(self):
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"""
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Callback called on hotword detection
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"""
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def callback():
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self.bus.post(HotwordDetectedEvent(hotword=self.hotword))
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return callback
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def run(self):
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super().run()
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self.detector.start(self.hotword_detected())
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# vim:sw=4:ts=4:et:
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