140 lines
4.0 KiB
Python
140 lines
4.0 KiB
Python
# Copyright 2017 Mycroft AI Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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import re
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from abc import ABCMeta, abstractmethod
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from requests import post
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from speech_recognition import Recognizer
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from mycroft.api import STTApi
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from mycroft.configuration import ConfigurationManager
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from mycroft.util.log import LOG
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class STT(object):
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__metaclass__ = ABCMeta
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def __init__(self):
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config_core = ConfigurationManager.get()
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self.lang = str(self.init_language(config_core))
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config_stt = config_core.get("stt", {})
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self.config = config_stt.get(config_stt.get("module"), {})
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self.credential = self.config.get("credential", {})
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self.recognizer = Recognizer()
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@staticmethod
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def init_language(config_core):
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lang = config_core.get("lang", "en-US")
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langs = lang.split("-")
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if len(langs) == 2:
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return langs[0].lower() + "-" + langs[1].upper()
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return lang
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@abstractmethod
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def execute(self, audio, language=None):
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pass
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class TokenSTT(STT):
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__metaclass__ = ABCMeta
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def __init__(self):
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super(TokenSTT, self).__init__()
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self.token = str(self.credential.get("token"))
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class BasicSTT(STT):
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__metaclass__ = ABCMeta
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def __init__(self):
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super(BasicSTT, self).__init__()
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self.username = str(self.credential.get("username"))
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self.password = str(self.credential.get("password"))
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class GoogleSTT(TokenSTT):
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def __init__(self):
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super(GoogleSTT, self).__init__()
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def execute(self, audio, language=None):
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self.lang = language or self.lang
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return self.recognizer.recognize_google(audio, self.token, self.lang)
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class WITSTT(TokenSTT):
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def __init__(self):
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super(WITSTT, self).__init__()
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def execute(self, audio, language=None):
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LOG.warning("WITSTT language should be configured at wit.ai settings.")
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return self.recognizer.recognize_wit(audio, self.token)
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class IBMSTT(BasicSTT):
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def __init__(self):
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super(IBMSTT, self).__init__()
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def execute(self, audio, language=None):
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self.lang = language or self.lang
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return self.recognizer.recognize_ibm(audio, self.username,
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self.password, self.lang)
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class MycroftSTT(STT):
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def __init__(self):
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super(MycroftSTT, self).__init__()
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self.api = STTApi()
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def execute(self, audio, language=None):
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self.lang = language or self.lang
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try:
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return self.api.stt(audio.get_flac_data(convert_rate=16000),
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self.lang, 1)[0]
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except:
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return self.api.stt(audio.get_flac_data(), self.lang, 1)[0]
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class KaldiSTT(STT):
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def __init__(self):
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super(KaldiSTT, self).__init__()
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def execute(self, audio, language=None):
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language = language or self.lang
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response = post(self.config.get("uri"), data=audio.get_wav_data())
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return self.get_response(response)
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def get_response(self, response):
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try:
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hypotheses = response.json()["hypotheses"]
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return re.sub(r'\s*\[noise\]\s*', '', hypotheses[0]["utterance"])
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except:
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return None
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class STTFactory(object):
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CLASSES = {
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"mycroft": MycroftSTT,
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"google": GoogleSTT,
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"wit": WITSTT,
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"ibm": IBMSTT,
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"kaldi": KaldiSTT
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}
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@staticmethod
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def create():
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config = ConfigurationManager.get().get("stt", {})
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module = config.get("module", "mycroft")
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clazz = STTFactory.CLASSES.get(module)
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return clazz()
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