67 lines
2.2 KiB
Python
67 lines
2.2 KiB
Python
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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import json
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import wave
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import io
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import base64
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def decode_str2bytes(data):
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# 将Base64编码的字节串解码为字节串
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if data is None:
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return None
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return base64.b64decode(data.encode('utf-8'))
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class STTBase:
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def __init__(self, RATE=16000, cfg_path=None, debug=False):
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self.RATE = RATE
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self.debug = debug
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self.asr_cfg = self.parse_json(cfg_path)
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def parse_json(self, cfg_path):
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cfg = None
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self.hotwords = None
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if cfg_path is not None:
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with open(cfg_path, 'r', encoding='utf-8') as f:
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cfg = json.load(f)
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self.hotwords = cfg.get('hot_words', None)
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return cfg
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def add_hotword(self, hotword):
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"""add hotword to list"""
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if self.hotwords is None:
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self.hotwords = ""
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if isinstance(hotword, str):
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self.hotwords = self.hotwords + " " + "hotword"
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elif isinstance(hotword, (list, tuple)):
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# 将hotwords转换为str，并用空格隔开
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self.hotwords = self.hotwords + " " + " ".join(hotword)
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else:
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raise TypeError("hotword must be str or list")
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def check_audio_type(self, audio_data):
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"""check audio data type and convert it to bytes if necessary."""
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if isinstance(audio_data, bytes):
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pass
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elif isinstance(audio_data, list):
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audio_data = b''.join(audio_data)
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elif isinstance(audio_data, str):
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audio_data = decode_str2bytes(audio_data)
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elif isinstance(audio_data, io.BytesIO):
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wf = wave.open(audio_data, 'rb')
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audio_data = wf.readframes(wf.getnframes())
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else:
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raise TypeError(f"audio_data must be bytes, str or io.BytesIO, but got {type(audio_data)}")
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return audio_data
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def text_postprecess(self, result, data_id='text'):
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"""postprecess recognized result."""
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text = result[data_id]
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if isinstance(text, list):
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text = ''.join(text)
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return text.replace(' ', '')
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def recognize(self, audio_data, queue=None):
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"""recognize audio data to text"""
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pass
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