126 lines
3.6 KiB
Python
126 lines
3.6 KiB
Python
import base64
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import json
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import os
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import sys
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import tempfile
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import traceback
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os.environ.setdefault("PYTHONIOENCODING", "utf-8")
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def log(message: str) -> None:
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print(message, file=sys.stderr, flush=True)
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def write_response(request_id: int, ok: bool, result=None, error: str | None = None) -> None:
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payload = {
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"id": request_id,
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"ok": ok,
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}
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if ok:
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payload["result"] = result
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else:
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payload["error"] = error or "unknown error"
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sys.stdout.write(json.dumps(payload, ensure_ascii=False) + "\n")
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sys.stdout.flush()
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class TtsWorker:
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def __init__(self) -> None:
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from melo.api import TTS
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self.language = os.environ.get("LOCAL_TTS_LANGUAGE", "KR").strip() or "KR"
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self.speaker_key = os.environ.get("LOCAL_TTS_SPEAKER", "KR").strip() or "KR"
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self.device = os.environ.get("LOCAL_TTS_DEVICE", "auto").strip() or "auto"
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self.speed = float(os.environ.get("LOCAL_TTS_SPEED", "1.12"))
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self.model = TTS(language=self.language, device=self.device)
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speaker_ids = self.model.hps.data.spk2id
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self.speaker_id = speaker_ids.get(self.speaker_key)
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if self.speaker_id is None:
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normalized = self.speaker_key.upper()
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self.speaker_id = speaker_ids.get(normalized)
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if self.speaker_id is None:
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self.speaker_id = next(iter(speaker_ids.values()))
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log(
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f"local-tts ready language={self.language} speaker={self.speaker_key} device={self.device} speed={self.speed}"
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)
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def synthesize(self, text: str) -> bytes:
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temp_path = ""
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try:
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with tempfile.NamedTemporaryFile(suffix=".wav", delete=False) as handle:
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temp_path = handle.name
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self.model.tts_to_file(
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text,
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self.speaker_id,
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temp_path,
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speed=self.speed,
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quiet=True,
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)
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with open(temp_path, "rb") as handle:
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return handle.read()
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finally:
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if temp_path:
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try:
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os.unlink(temp_path)
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except OSError:
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pass
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def main() -> int:
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try:
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worker = TtsWorker()
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except Exception as exc:
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log("failed to initialize local TTS worker")
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log("run `bun run setup:local-ai` first if dependencies are missing")
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log("".join(traceback.format_exception(exc)))
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return 1
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for line in sys.stdin:
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line = line.strip()
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if not line:
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continue
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try:
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request = json.loads(line)
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request_id = int(request["id"])
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method = request["method"]
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params = request.get("params", {})
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if method == "ping":
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write_response(request_id, True, {"ready": True})
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continue
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if method != "synthesize":
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raise ValueError(f"unsupported method: {method}")
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text = str(params.get("text", "")).strip()
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if not text:
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raise ValueError("text is empty")
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audio = worker.synthesize(text)
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write_response(
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request_id,
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True,
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{
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"wav_base64": base64.b64encode(audio).decode("ascii"),
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},
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)
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except Exception as exc:
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error_text = "".join(traceback.format_exception_only(type(exc), exc)).strip()
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write_response(request_id, False, error=error_text)
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return 0
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if __name__ == "__main__":
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raise SystemExit(main())
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