266 lines
8.0 KiB
Python
266 lines
8.0 KiB
Python
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from __future__ import annotations
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import asyncio
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import os
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import platform
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import re
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import shutil
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import subprocess
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import tempfile
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from dataclasses import dataclass
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from fastapi.concurrency import run_in_threadpool
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from loguru import logger
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from app.config import Settings
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from app.services.baidu_speech import BaiduSpeechNotConfiguredError, BaiduSpeechService
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_CN_DIGITS = {
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"零": 0,
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"一": 1,
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"二": 2,
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"两": 2,
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"三": 3,
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"四": 4,
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"五": 5,
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"六": 6,
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"七": 7,
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"八": 8,
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"九": 9,
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"十": 10,
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}
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def parse_voice_choice(asr_text: str, options: list[str]) -> str | None:
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"""
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从识别文本中解析医生选择的耗材名称。
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支持：完全匹配、子串匹配、第 N 个（1/一/第一个）。
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"""
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raw = (asr_text or "").strip()
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if not raw:
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return None
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normalized = raw.replace(" ", "").lower()
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for opt in options:
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if opt and opt in raw:
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return opt
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m_num = re.search(r"(\d+)", raw)
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if m_num:
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idx = int(m_num.group(1)) - 1
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if 0 <= idx < len(options):
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return options[idx]
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m_cn = re.search(r"第([一二两三四五六七八九十\d]+)个", raw)
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if m_cn:
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token = m_cn.group(1)
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if token.isdigit():
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idx = int(token) - 1
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elif token in _CN_DIGITS:
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idx = _CN_DIGITS[token] - 1
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else:
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idx = -1
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if 0 <= idx < len(options):
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return options[idx]
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for i, opt in enumerate(options):
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if not opt:
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continue
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aliases = [f"第{i + 1}个", f"第{i + 1}", f"{i + 1}号"]
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if any(a in normalized for a in aliases):
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return opt
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negatives = ("不是", "没有", "否", "无", "错")
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if any(n in raw for n in negatives):
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return None
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return None
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def is_rejection_phrase(asr_text: str) -> bool:
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"""医生明确否认全部候选时返回 True（须在 parse_voice_choice 之前调用）。"""
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raw = (asr_text or "").strip()
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if not raw:
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return False
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negatives = ("不是", "没有", "否", "无", "错")
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return any(n in raw for n in negatives)
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def build_prompt_text(options: list[tuple[str, float]]) -> str:
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parts = ["请确认刚才使用的耗材是下面哪一项，可以说序号或名称。"]
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for i, (name, _conf) in enumerate(options, start=1):
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parts.append(f"第{i}个，{name}。")
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parts.append("若都不是请说不是。")
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return "".join(parts)
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@dataclass
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class VoiceAttemptResult:
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chosen_label: str | None
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asr_text: str | None
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error: str | None
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class VoiceConfirmationOrchestrator:
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"""服务端 TTS 播报 + ffmpeg 采集 + 百度 ASR + 文本解析。"""
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def __init__(self, settings: Settings, baidu: BaiduSpeechService) -> None:
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self._s = settings
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self._baidu = baidu
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self._lock = asyncio.Lock()
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def _ffplay_path(self) -> str | None:
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return shutil.which("ffplay")
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def _ffmpeg_path(self) -> str | None:
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return shutil.which("ffmpeg")
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def _record_pcm_ffmpeg(self, seconds: float) -> tuple[bytes | None, str | None]:
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ffmpeg = self._ffmpeg_path()
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if not ffmpeg:
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return None, "ffmpeg not found in PATH"
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system = platform.system()
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if system == "Darwin":
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dev = self._s.voice_ffmpeg_input.strip() or ":0"
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input_args = ["-f", "avfoundation", "-i", dev]
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else:
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dev = self._s.voice_ffmpeg_input.strip() or "default"
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input_args = ["-f", "alsa", "-i", dev]
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cmd = [
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ffmpeg,
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"-nostdin",
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"-loglevel",
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"error",
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"-y",
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*input_args,
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"-t",
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str(seconds),
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"-ar",
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"16000",
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"-ac",
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"1",
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"-f",
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"s16le",
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"-acodec",
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"pcm_s16le",
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"pipe:1",
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]
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try:
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proc = subprocess.run(
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cmd,
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capture_output=True,
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timeout=seconds + 5.0,
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check=False,
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)
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except subprocess.TimeoutExpired:
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return None, "ffmpeg record timeout"
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if proc.returncode != 0:
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err = (proc.stderr or b"").decode("utf-8", errors="replace")
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return None, f"ffmpeg failed: {err or proc.returncode}"
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return proc.stdout, None
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def _play_mp3_file(self, path: str) -> str | None:
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ffplay = self._ffplay_path()
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if not ffplay:
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return "ffplay not found in PATH"
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try:
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proc = subprocess.run(
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[
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ffplay,
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"-nodisp",
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"-autoexit",
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"-loglevel",
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"quiet",
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path,
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],
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capture_output=True,
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timeout=120.0,
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check=False,
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)
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except subprocess.TimeoutExpired:
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return "ffplay timeout"
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if proc.returncode != 0:
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return f"ffplay exit {proc.returncode}"
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return None
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def _synthesize_to_temp_mp3(self, text: str) -> tuple[str | None, str | None]:
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try:
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audio = self._baidu.synthesis(
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text,
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"zh",
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1,
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{"spd": 5, "pit": 5, "vol": 9, "per": 0},
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)
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except BaiduSpeechNotConfiguredError as exc:
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return None, str(exc)
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if isinstance(audio, dict):
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return None, f"TTS error: {audio!r}"
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tmp = tempfile.NamedTemporaryFile(suffix=".mp3", delete=False)
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try:
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tmp.write(audio)
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tmp.flush()
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path = tmp.name
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finally:
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tmp.close()
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return path, None
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async def run_confirmation(
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self,
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*,
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surgery_id: str,
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options: list[tuple[str, float]],
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) -> VoiceAttemptResult:
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if not self._s.voice_confirmation_enabled:
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return VoiceAttemptResult(None, None, "voice_confirmation_disabled")
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if not options:
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return VoiceAttemptResult(None, None, "no_options")
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if not self._baidu.configured:
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return VoiceAttemptResult(None, None, "baidu_speech_not_configured")
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labels = [o[0] for o in options]
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prompt = build_prompt_text(options)
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logger.info("Voice confirm surgery={} prompt_len={}", surgery_id, len(prompt))
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async with self._lock:
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mp3_path, err = await run_in_threadpool(self._synthesize_to_temp_mp3, prompt)
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if err or not mp3_path:
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return VoiceAttemptResult(None, None, err or "tts_failed")
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try:
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play_err = await run_in_threadpool(self._play_mp3_file, mp3_path)
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if play_err:
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return VoiceAttemptResult(None, None, play_err)
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finally:
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try:
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os.unlink(mp3_path)
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except OSError:
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pass
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pcm, rec_err = await run_in_threadpool(
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self._record_pcm_ffmpeg, float(self._s.voice_record_seconds)
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)
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if rec_err or not pcm:
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return VoiceAttemptResult(None, None, rec_err or "empty_audio")
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asr_payload = await run_in_threadpool(self._baidu.asr, pcm, "pcm", 16000, None)
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if not isinstance(asr_payload, dict):
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return VoiceAttemptResult(None, None, "asr_invalid_response")
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if asr_payload.get("err_no") != 0:
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return VoiceAttemptResult(
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None,
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None,
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f"asr_err_{asr_payload.get('err_no')}: {asr_payload.get('err_msg')}",
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)
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results = asr_payload.get("result")
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text: str | None = None
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if isinstance(results, list) and results:
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text = str(results[0])
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elif isinstance(results, str):
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text = results
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if not text:
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return VoiceAttemptResult(None, None, "asr_empty_text")
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chosen = parse_voice_choice(text, labels)
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return VoiceAttemptResult(chosen, text, None)
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