phase3: render_engine export qua native_bridge, FX scipy fallback, bỏ pedalboard branch

- VSTi track: SF_RENDER_ENGINE=bridge → native_render.render_offline (velocity float 0..1 từ midi_events MIDI 0..127), fallback oscillator khi lỗi - chorus/reverb/gain: luôn dùng scipy/numpy fallback, xóa nhánh HAS_PEDALBOARD - bỏ top-level import pedalboard (Pedalboard/Gain/Chorus/Reverb) - test mới: bridge branch fallback, FX chorus/reverb scipy
2026-08-17 11:10:43 +07:00
parent fb63f06292
commit efe26e3277
2 changed files with 175 additions and 94 deletions
@@ -18,3 +18,72 @@ def test_render_session_container_empty():
    buf = engine.render_session_container(session, {}, 120.0, 4, 1000)
    assert buf.shape == (2, 1000)
    assert (buf == 0.0).all()
+
+def _midi_track(instrument_id, fx_type=None):
+    return {
+        "id": "t1",
+        "type": "MIDI",
+        "instrument_id": instrument_id,
+        "instrument_source": "vsti",
+        "fx_type": fx_type,
+        "volume_db": 0.0,
+        "pan": 0.0,
+        "mute": False,
+        "items": [{
+            "type": "MIDI_ITEM",
+            "start_bar": 0.0,
+            "duration_bars": 1.0,
+            "clip_start_offset_bars": 0.0,
+            "source_data": {
+                "notes": [
+                    {"pitch": 60, "velocity": 0.8, "start_beat": 0.0, "duration_beats": 1.0}
+                ]
+            },
+        }],
+    }
+
+
+def test_render_session_vsti_bridge_unknown_instrument_falls_back(monkeypatch):
+    """SF_RENDER_ENGINE=bridge: track VSTi đi vào native_render; instrument lạ
+    (404) → fallback oscillator, không crash, không cần pedalboard."""
+    from app.api.v1 import plugins as pl
+    monkeypatch.setattr(pl.settings, "RENDER_ENGINE", "bridge")
+    engine = PythonRenderEngine()
+    session = {"tracks": [_midi_track("__no_such_plugin__")]}
+    buf = engine.render_session_container(session, {}, 120.0, 4, 44100)
+    assert buf.shape == (2, 44100)
+    # oscillator sinh âm thật (non-silent)
+    assert (buf != 0.0).any()
+
+
+def test_render_session_vsti_pedalboard_default_falls_back(monkeypatch):
+    """Mặc định pedalboard: không có plugin load được → oscillator (không crash)."""
+    from app.api.v1 import plugins as pl
+    monkeypatch.setattr(pl.settings, "RENDER_ENGINE", "pedalboard")
+    engine = PythonRenderEngine()
+    session = {"tracks": [_midi_track("__no_such_plugin__")]}
+    buf = engine.render_session_container(session, {}, 120.0, 4, 44100)
+    assert buf.shape == (2, 44100)
+
+
+def test_render_session_fx_chorus_scipy_fallback():
+    """FX chorus: fallback scipy (không pedalboard) không crash, thay đổi âm."""
+    from app.api.v1 import plugins as pl
+    pl.settings.RENDER_ENGINE = "pedalboard"
+    engine = PythonRenderEngine()
+    session = {"tracks": [_midi_track("__no_such_plugin__", fx_type="chorus")]}
+    buf = engine.render_session_container(session, {}, 120.0, 4, 44100)
+    assert buf.shape == (2, 44100)
+    assert (buf != 0.0).any()
+
+
+def test_render_session_fx_reverb_scipy_fallback():
+    """FX reverb: fallback scipy (không pedalboard) không crash, thay đổi âm."""
+    from app.api.v1 import plugins as pl
+    pl.settings.RENDER_ENGINE = "pedalboard"
+    engine = PythonRenderEngine()
+    session = {"tracks": [_midi_track("__no_such_plugin__", fx_type="reverb")]}
+    buf = engine.render_session_container(session, {}, 120.0, 4, 44100)
+    assert buf.shape == (2, 44100)
+    assert (buf != 0.0).any()
+