JiriUhlir
57 lines
2.0 KiB
Python
57 lines
2.0 KiB
Python
"""Klient pro Deepgram pre-recorded přepis (REST, přes httpx).
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Nepoužíváme těžké SDK — voláme REST endpoint přímo, aby nebyl závislý na verzích.
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"""
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import httpx
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from ..config import DEEPGRAM_BASE_URL, UPSTREAM_TIMEOUT_SECONDS
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from ..errors import UpstreamError, raise_for_upstream
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from ..logging_config import get_logger
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log = get_logger("audio-transcription.deepgram")
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async def transcribe(
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*,
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api_key: str,
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audio: bytes,
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content_type: str,
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model: str,
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language: str,
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diarize: bool,
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smart_format: bool,
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) -> str:
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"""Přepíše audio Deepgramem a vrátí prostý transkript (channels[0].alternatives[0].transcript)."""
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params = {
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"model": model,
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"language": language,
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"diarize": "true" if diarize else "false",
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"smart_format": "true" if smart_format else "false",
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}
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headers = {
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"Authorization": f"Token {api_key}",
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"Content-Type": content_type or "application/octet-stream",
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}
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url = f"{DEEPGRAM_BASE_URL}/listen"
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try:
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async with httpx.AsyncClient(timeout=UPSTREAM_TIMEOUT_SECONDS) as client:
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resp = await client.post(url, params=params, headers=headers, content=audio)
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except httpx.HTTPError as exc:
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log.error("Deepgram request failed: %s", exc)
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raise UpstreamError(f"Deepgram request se nezdařil: {exc}") from exc
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if resp.status_code >= 400:
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# Deepgram vrací chybu v JSON; nikdy nelogujeme klíč (ten je jen v hlavičce).
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log.warning("Deepgram returned %s: %s", resp.status_code, resp.text[:500])
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raise_for_upstream("Deepgram", resp.status_code, resp.text)
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data = resp.json()
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try:
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channels = data["results"]["channels"]
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alternative = channels[0]["alternatives"][0]
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return alternative.get("transcript", "") or ""
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except (KeyError, IndexError, TypeError) as exc:
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log.error("Unexpected Deepgram response shape: %s", exc)
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raise UpstreamError("Neočekávaná struktura odpovědi z Deepgramu.") from exc
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