Phase 0: Repository-Initialisierung nach Bauplan v1.2

- Struktur gemäß §8 (Eigentumsgrenzen), PLAN.md als normative Basis
- Pflichtdokumente: STATUS.md, ERRORS.md, TEST_REPORT.md, CHANGELOG.md, ADRs
- ADR-0001 Python 3.13-Pin, ADR-0002 GStreamer 1.28.6-Pin (Windows),
  ADR-0003 IPC TCP+MessagePack v1
- Kernpakete: hms_protocol, hms_domain, hms_parameter, hms_artnet,
  hms_adaptive, hms_capabilities, hms_plugin_sdk
- Renderer-Spike: D3D11-Primärpfad + Dev-GL-Pfad (§36 Nr. 4-5)
- Control Core: FastAPI REST + WebSocket (§36 Nr. 9)
- Beispielplugins: Passthrough + Gaussian Blur (3 Adaptive-Quality-
  Varianten, HLSL/GLSL/GLES)
- Tools: Art-Net-Emulator, Fixture-Generator (Master32/Layer64-CSV),
  Capability-Probe
- JSON-Schemas: IPC, Plugin, Projekt, Cluster
- 121 Unit-/Integrationstests grün, Ruff grün

Gate 0 bleibt offen: Hardwaremessungen nur auf echter Windows-Referenz-
hardware gültig (§29.7, §33).

tests/unit/test_pipelines.py

@@ -0,0 +1,61 @@
+"""Unit-Tests Renderer-Pipeline-Definitionen (PLAN.md §12, §36 Nr. 4–5)."""
+
+from __future__ import annotations
+
+from hms_renderer import (
+    D3D11Pipeline,
+    DevGLPipeline,
+    build_compositor_pipeline,
+    build_single_video_pipeline,
+    gst_available,
+)
+
+
+def test_single_video_d3d11_uses_hardware_decoder_path() -> None:
+    pipeline = build_single_video_pipeline("C:/clips/test.mp4", d3d11=True)
+    assert "d3d11" in pipeline
+    assert "d3d11videosink" in pipeline
+    assert "fullscreen=true" in pipeline  # randloses Vollbild (§3.3)
+    assert "uridecodebin" in pipeline
+
+
+def test_single_video_devgl_marked_alternative() -> None:
+    pipeline = build_single_video_pipeline("/tmp/test.mp4", d3d11=False)
+    assert "d3d11" not in pipeline  # Dev-Pfad darf D3D11 nicht still nutzen
+    assert "glimagesink" in pipeline
+
+
+def test_compositor_d3d11_mixed_two_sources_on_gpu() -> None:
+    pipeline = build_compositor_pipeline("a.mp4", "b.mp4", d3d11=True)
+    # Zwei Quellen → Compositor → Ausgabe ohne CPU-Readback (§36 Nr. 5)
+    assert pipeline.count("uridecodebin") == 2
+    assert "d3d11compositor" in pipeline
+    assert "d3d11convert" in pipeline
+    assert "D3D11Memory" in pipeline  # GPU-Residenz explizit angefordert
+    assert "appsink" not in pipeline  # kein CPU-Abgriff im Normalpfad
+    assert "videoconvert" not in pipeline  # kein Software-Farbkonverter
+
+
+def test_compositor_devgl_is_separate_path() -> None:
+    pipeline = build_compositor_pipeline("a.mp4", "b.mp4", d3d11=False)
+    assert "glvideomixer" in pipeline
+    assert "d3d11" not in pipeline
+
+
+def test_d3d11_pipeline_splits_screen_for_two_videos() -> None:
+    p = D3D11Pipeline(video_a="a.mp4", video_b="b.mp4", width=1920, height=1080)
+    s = p.launch_string()
+    assert "sink_0::width=960" in s  # linke Hälfte
+    assert "sink_1::width=960" in s  # rechte Hälfte
+    assert "width=1920,height=1080" in s  # Master-Auflösung
+
+
+def test_devgl_pipeline_reduced_resolution() -> None:
+    p = DevGLPipeline(video_a="a.mp4", video_b="b.mp4")
+    assert p.width == 960 and p.height == 540  # Dev-Pfad kleiner, gekennzeichnet
+
+
+def test_gst_available_reflects_environment() -> None:
+    # Im Entwicklungscontainer ist GStreamer nicht installiert → False.
+    # Auf dem Windows-Ziel mit gebündelter Runtime → True. Kein Fake.
+    assert isinstance(gst_available(), bool)