68 lines
2.0 KiB
Python
68 lines
2.0 KiB
Python
"""Caption generation endpoint."""
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import logging
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from typing import List, Optional
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from fastapi import APIRouter, HTTPException
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from fastapi.responses import PlainTextResponse
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from pydantic import BaseModel
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from services.caption_generator import generate_srt, generate_vtt, generate_ass, save_captions
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logger = logging.getLogger(__name__)
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router = APIRouter()
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class CaptionWord(BaseModel):
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word: str
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start: float
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end: float
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confidence: float = 0.0
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class CaptionStyle(BaseModel):
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fontName: str = "Arial"
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fontSize: int = 48
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fontColor: str = "&H00FFFFFF"
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backgroundColor: str = "&H80000000"
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position: str = "bottom"
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bold: bool = True
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class CaptionRequest(BaseModel):
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words: List[CaptionWord]
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deleted_indices: List[int] = []
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format: str = "srt"
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words_per_line: int = 8
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style: Optional[CaptionStyle] = None
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output_path: Optional[str] = None
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@router.post("/captions")
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async def generate_captions(req: CaptionRequest):
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try:
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words_dicts = [w.model_dump() for w in req.words]
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deleted_set = set(req.deleted_indices)
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if req.format == "srt":
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content = generate_srt(words_dicts, deleted_set, req.words_per_line)
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elif req.format == "vtt":
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content = generate_vtt(words_dicts, deleted_set, req.words_per_line)
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elif req.format == "ass":
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style_dict = req.style.model_dump() if req.style else None
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content = generate_ass(words_dicts, deleted_set, req.words_per_line, style_dict)
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else:
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raise HTTPException(status_code=400, detail=f"Unknown format: {req.format}")
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if req.output_path:
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saved = save_captions(content, req.output_path)
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return {"status": "ok", "output_path": saved}
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return PlainTextResponse(content, media_type="text/plain")
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except HTTPException:
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raise
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except Exception as e:
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logger.error(f"Caption generation failed: {e}", exc_info=True)
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raise HTTPException(status_code=500, detail=str(e))
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