First commit

app/api/v1/multitrack.py

@@ -0,0 +1,78 @@
+import os
+from fastapi import APIRouter, HTTPException
+from pydantic import BaseModel
+from typing import List, Optional
+from app.config import settings
+
+router = APIRouter()
+
+class ClipConfig(BaseModel):
+    clip_id: str
+    start_time_seconds: float
+    end_time_seconds: float
+    loop_count: int = 1
+    apply_zero_crossing: bool = True
+    fade_in_ms: int = 150
+    fade_out_ms: int = 150
+
+class TrackConfig(BaseModel):
+    track_id: str
+    file_id: str
+    volume: float = 1.0
+    muted: bool = False
+    clips: List[ClipConfig] = []
+
+class ExportSettings(BaseModel):
+    sample_rate: int = 44100
+    bit_depth: int = 16
+    format: str = "wav"
+
+class MultitrackSessionRequest(BaseModel):
+    session_id: str
+    export_settings: ExportSettings
+    tracks: List[TrackConfig]
+
+@router.post("/mix")
+async def mix_multitrack_session(req: MultitrackSessionRequest):
+    """
+    API endpoint để xử lý hòa âm đa kênh (Multitrack Mixdown).
+    Nhận cấu hình JSON từ Client và gửi task xuống Celery Worker.
+    """
+    # Kiểm tra xem các file nguồn có tồn tại không
+    for track in req.tracks:
+        if track.muted:
+            continue
+            
+        upload_path = os.path.join(settings.UPLOADS_DIR, track.file_id)
+        processed_path = os.path.join(settings.PROCESSED_DIR, track.file_id)
+        
+        if not os.path.exists(upload_path) and not os.path.exists(processed_path):
+            raise HTTPException(
+                status_code=404, 
+                detail=f"File not found for track {track.track_id}: {track.file_id}"
+            )
+    
+    # Gửi task xuống Celery Worker
+    from app.tasks.worker import mix_multitrack_task
+    task = mix_multitrack_task.delay(req.dict())
+    
+    return {
+        "task_id": task.id,
+        "session_id": req.session_id,
+        "status": "processing"
+    }
+
+@router.post("/process-session")
+async def process_session(req: MultitrackSessionRequest):
+    """
+    API endpoint để xử lý toàn bộ session với nhiều tracks và clips.
+    Xử lý từng clip, sau đó hòa âm tất cả tracks lại với nhau.
+    """
+    from app.tasks.worker import process_multitrack_session_task
+    task = process_multitrack_session_task.delay(req.dict())
+    
+    return {
+        "task_id": task.id,
+        "session_id": req.session_id,
+        "status": "processing"
+    }