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"""Endpointy pro přepis audia.
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- POST /transcribe/dual → paralelní přepis Deepgram + OpenAI Whisper (dva texty)
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- POST /transcribe/combined → dual + sloučení do jednoho co nejlepšího přepisu (merge)
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Audio přichází jako proměnná (upload `file` ve form-data). Všechny ostatní parametry
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jsou v POST těle (form fields). API klíče jsou v X- hlavičkách (viz credentials.py).
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Výstup je vždy JSON.
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"""
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import asyncio
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from fastapi import APIRouter, Depends, File, Form, UploadFile
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from pydantic import BaseModel, Field
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from ..clients import deepgram_client, openai_client
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from ..config import (
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DEFAULT_CHAT_MODEL,
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DEFAULT_DEEPGRAM_MODEL,
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DEFAULT_LANGUAGE,
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DEFAULT_WHISPER_MODEL,
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)
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from ..credentials import Credentials, get_credentials
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from ..errors import BadRequestError
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from ..logging_config import get_logger
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from ..prompts import DEFAULT_COMBINE_PROMPT
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log = get_logger("audio-transcription.transcribe")
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router = APIRouter(tags=["transcribe"])
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class DualResult(BaseModel):
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text1: str = Field(..., description="Přepis z Deepgramu.")
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text2: str = Field(..., description="Přepis z OpenAI Whisper.")
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deepgram_model: str
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whisper_model: str
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language: str
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class CombinedResult(DualResult):
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merged: str = Field(..., description="Sloučený, co nejpřesnější výsledný přepis.")
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chat_model: str
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async def _read_upload(file: UploadFile) -> tuple[bytes, str, str]:
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"""Načte upload do paměti a vrátí (bytes, filename, content_type)."""
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audio = await file.read()
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if not audio:
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raise BadRequestError("Nahraný soubor je prázdný.")
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filename = file.filename or "audio.mp3"
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content_type = file.content_type or "application/octet-stream"
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return audio, filename, content_type
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async def _transcribe_dual(
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creds: Credentials,
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audio: bytes,
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filename: str,
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content_type: str,
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deepgram_model: str,
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whisper_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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) -> tuple[str, str]:
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"""Spustí oba přepisy paralelně; vrátí (deepgram_text, whisper_text)."""
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deepgram_key = creds.require_deepgram()
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openai_key = creds.require_openai()
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text1, text2 = await asyncio.gather(
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deepgram_client.transcribe(
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api_key=deepgram_key,
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audio=audio,
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content_type=content_type,
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model=deepgram_model,
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language=language,
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diarize=diarize,
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smart_format=smart_format,
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),
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openai_client.transcribe(
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api_key=openai_key,
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audio=audio,
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filename=filename,
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content_type=content_type,
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model=whisper_model,
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language=language,
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),
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)
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return text1, text2
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@router.post(
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"/transcribe/dual",
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response_model=DualResult,
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summary="Paralelní přepis Deepgram + OpenAI Whisper",
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description="Přijme audio soubor a vrátí dva nezávislé přepisy: "
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"`text1` z Deepgramu a `text2` z OpenAI Whisper.",
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)
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async def transcribe_dual(
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file: UploadFile = File(..., description="Audio soubor k přepisu (proměnná)."),
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deepgram_model: str = Form(DEFAULT_DEEPGRAM_MODEL, description="Deepgram model."),
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whisper_model: str = Form(DEFAULT_WHISPER_MODEL, description="OpenAI přepisový model."),
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language: str = Form(DEFAULT_LANGUAGE, description="Jazyk audia (ISO kód, např. cs)."),
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diarize: bool = Form(True, description="Deepgram diarizace (rozlišení mluvčích)."),
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smart_format: bool = Form(True, description="Deepgram smart formatting."),
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creds: Credentials = Depends(get_credentials),
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) -> DualResult:
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audio, filename, content_type = await _read_upload(file)
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text1, text2 = await _transcribe_dual(
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creds, audio, filename, content_type,
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deepgram_model, whisper_model, language, diarize, smart_format,
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)
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return DualResult(
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text1=text1,
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text2=text2,
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deepgram_model=deepgram_model,
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whisper_model=whisper_model,
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language=language,
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)
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@router.post(
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"/transcribe/combined",
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response_model=CombinedResult,
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summary="Dual přepis + AI sloučení do nejlepšího přepisu",
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description="Přijme audio soubor, vytvoří přepis z Deepgramu i Whisperu a poté je "
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"sloučí přes OpenAI Chat podle `combine_prompt` do jediného, co nejpřesnějšího "
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"českého přepisu. Vrací `text1`, `text2` i výsledný `merged`.",
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)
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async def transcribe_combined(
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file: UploadFile = File(..., description="Audio soubor k přepisu (proměnná)."),
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combine_prompt: str = Form(
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DEFAULT_COMBINE_PROMPT,
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description="System prompt pro sloučení. Nezadáš-li, použije se výchozí "
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"'Czech Transcript Merger'.",
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),
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deepgram_model: str = Form(DEFAULT_DEEPGRAM_MODEL, description="Deepgram model."),
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whisper_model: str = Form(DEFAULT_WHISPER_MODEL, description="OpenAI přepisový model."),
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chat_model: str = Form(DEFAULT_CHAT_MODEL, description="OpenAI chat model pro sloučení."),
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language: str = Form(DEFAULT_LANGUAGE, description="Jazyk audia (ISO kód, např. cs)."),
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diarize: bool = Form(True, description="Deepgram diarizace (rozlišení mluvčích)."),
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smart_format: bool = Form(True, description="Deepgram smart formatting."),
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creds: Credentials = Depends(get_credentials),
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) -> CombinedResult:
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audio, filename, content_type = await _read_upload(file)
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text1, text2 = await _transcribe_dual(
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creds, audio, filename, content_type,
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deepgram_model, whisper_model, language, diarize, smart_format,
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)
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prompt = combine_prompt.strip() if combine_prompt and combine_prompt.strip() else DEFAULT_COMBINE_PROMPT
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merged = await openai_client.merge_transcripts(
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api_key=creds.require_openai(),
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model=chat_model,
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system_prompt=prompt,
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text_deepgram=text1,
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text_whisper=text2,
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)
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return CombinedResult(
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text1=text1,
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text2=text2,
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merged=merged,
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deepgram_model=deepgram_model,
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whisper_model=whisper_model,
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chat_model=chat_model,
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language=language,
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)
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