feat: VST FX rack per-track + masterbus render via native_bridge

2026-08-17 21:31:57 +07:00
parent 8fbacd1d2b
commit b261eb0d7e
18 changed files with 1805 additions and 14 deletions
@@ -192,3 +192,85 @@ def render_offline(instrument_id, notes, bpm, sample_rate, preset_id=None,
                os.remove(job_path)
            except Exception:
                pass
+
+
+def render_fx_chain(input_wav, fx_chain, sample_rate, out_path=None) -> str:
+    """Render WAV qua native_bridge --render-fx (VST3 FX + builtin gain/normalize).
+
+    fx_chain: list dict {type: "vst3"|"builtin", path|id, preset_b64?, bypass?,
+    params?}. path là plugin id/name → resolve_plugin_path (".vst3"). Trả
+    out_path; lỗi → HTTPException (501 thiếu bridge, 404 plugin lạ, 500 render).
+    """
+    from app.core.vst_engine import resolve_plugin_path
+    exe = find_bridge_exe()
+    if not exe:
+        raise HTTPException(
+            status_code=501,
+            detail="native_bridge không khả dụng — đặt SF_BRIDGE_PATH hoặc cài daw_vst_bridge",
+        )
+    slots = []
+    for fx in fx_chain or []:
+        typ = fx.get("type")
+        if typ == "vst3":
+            p = (fx.get("path") or "").strip()
+            resolved = p if os.path.isfile(p) else resolve_plugin_path(p, ".vst3")
+            if not resolved:
+                raise HTTPException(
+                    status_code=404,
+                    detail=f"Không tìm thấy VST3 FX: {p} — bấm Plugins Manager → Scan trước.",
+                )
+            slots.append({"type": "vst3", "path": resolved,
+                          "preset_b64": fx.get("preset_b64", "") or "",
+                          "bypass": bool(fx.get("bypass"))})
+        elif typ == "builtin":
+            slots.append({"type": "builtin", "id": fx.get("id", "gain"),
+                          "params": dict(fx.get("params") or {}),
+                          "bypass": bool(fx.get("bypass"))})
+        else:
+            raise HTTPException(status_code=400, detail=f"fx_chain slot không hợp lệ: {typ}")
+    if not slots:
+        raise HTTPException(status_code=400, detail="fx_chain trống — không có FX để render")
+    job = {"sample_rate": int(sample_rate), "block_size": 512, "fx_chain": slots}
+    os.makedirs(settings.PROCESSED_DIR, exist_ok=True)
+    out = out_path or os.path.join(settings.PROCESSED_DIR, f"fx_{uuid.uuid4().hex[:10]}.wav")
+    job_path = out + ".job.json"
+    try:
+        with open(job_path, "w", encoding="utf-8") as fh:
+            json.dump(job, fh)
+        r = subprocess.run([exe, "--render-fx", job_path, "--in", input_wav, "--out", out],
+                           capture_output=True, text=True, timeout=120)
+        log = ((r.stdout or "") + (r.stderr or "")).strip()
+        if r.returncode != 0 or not os.path.isfile(out):
+            if os.path.exists(out):
+                try:
+                    os.remove(out)
+                except Exception:
+                    pass
+            if r.returncode == 2:
+                raise HTTPException(status_code=500,
+                                    detail=f"Bridge không load được plugin. {log[-500:]}")
+            raise HTTPException(status_code=500,
+                                detail=f"FX render thất bại (rc={r.returncode}). {log[-500:]}")
+        return out
+    except HTTPException:
+        raise
+    except subprocess.TimeoutExpired:
+        if os.path.exists(out):
+            try:
+                os.remove(out)
+            except Exception:
+                pass
+        raise HTTPException(status_code=500, detail="FX render quá lâu (timeout 120s)")
+    except Exception as e:
+        if os.path.exists(out):
+            try:
+                os.remove(out)
+            except Exception:
+                pass
+        raise HTTPException(status_code=500, detail=f"FX render thất bại: {e}")
+    finally:
+        if os.path.exists(job_path):
+            try:
+                os.remove(job_path)
+            except Exception:
+                pass