mirror of
https://github.com/xinnan-tech/xiaozhi-esp32-server.git
synced 2026-07-28 10:03:54 +08:00
67 lines
2.2 KiB
Python
67 lines
2.2 KiB
Python
import os
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import uuid
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import wave
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import opuslib_next
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from abc import ABC, abstractmethod
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from config.logger import setup_logging
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from typing import Optional, Tuple, List
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TAG = __name__
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logger = setup_logging()
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class ASRProviderBase(ABC):
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def __init__(self):
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self.audio_format = "opus"
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def save_audio_to_file(self, pcm_data: List[bytes], session_id: str) -> str:
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"""PCM数据保存为WAV文件"""
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module_name = __name__.split(".")[-1]
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file_name = f"asr_{module_name}_{session_id}_{uuid.uuid4()}.wav"
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file_path = os.path.join(self.output_dir, file_name)
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with wave.open(file_path, "wb") as wf:
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wf.setnchannels(1)
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wf.setsampwidth(2) # 2 bytes = 16-bit
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wf.setframerate(16000)
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wf.writeframes(b"".join(pcm_data))
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return file_path
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@abstractmethod
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async def speech_to_text(
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self, opus_data: List[bytes], session_id: str
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) -> Tuple[Optional[str], Optional[str]]:
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"""将语音数据转换为文本"""
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pass
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def set_audio_format(self, format: str) -> None:
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"""设置音频格式"""
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self.audio_format = format
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@staticmethod
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def decode_opus(opus_data: List[bytes]) -> bytes:
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"""将Opus音频数据解码为PCM数据"""
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try:
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decoder = opuslib_next.Decoder(16000, 1) # 16kHz, 单声道
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pcm_data = []
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buffer_size = 960 # 每次处理960个采样点
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for opus_packet in opus_data:
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try:
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# 使用较小的缓冲区大小进行处理
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pcm_frame = decoder.decode(opus_packet, buffer_size)
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if pcm_frame:
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pcm_data.append(pcm_frame)
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except opuslib_next.OpusError as e:
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logger.bind(tag=TAG).warning(f"Opus解码错误，跳过当前数据包: {e}")
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continue
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except Exception as e:
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logger.bind(tag=TAG).error(f"音频处理错误: {e}", exc_info=True)
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continue
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return pcm_data
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except Exception as e:
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logger.bind(tag=TAG).error(f"音频解码过程发生错误: {e}", exc_info=True)
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return []
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