80 lines
2.9 KiB
Python
80 lines
2.9 KiB
Python
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"""Renderer-Pipeline-Definitionen (PLAN.md §12, §13, §36 Nr. 4–5).
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Windows-Primärpfad (§12.6): d3d11h264dec → D3D11Memory → d3d11compositor
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→ d3d11videosink. Kein CPU-Rundweg (Decoder → RAM → Upload verboten).
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DevGL-Pfad: Nur für Entwicklung/CI-Umgebungen ohne D3D11; ausdrücklich
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gekennzeichnet, kein stiller Ersatz im Normalbetrieb (§5.2, §33).
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"""
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from __future__ import annotations
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import shutil
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from dataclasses import dataclass
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@dataclass(frozen=True)
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class D3D11Pipeline:
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"""Primärpipeline Windows: durchgängig D3D11Memory."""
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video_a: str
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video_b: str
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width: int = 1920
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height: int = 1080
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fullscreen: bool = True
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def launch_string(self) -> str:
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sink = "d3d11videosink fullscreen=true" if self.fullscreen else "d3d11videosink"
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# Zwei Quellen → Compositor → Ausgabe (§36 Nr. 5: zwei Videos GPU-mischen)
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return (
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f"d3d11compositor name=mix sink_0::xpos=0 sink_0::ypos=0 "
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f"sink_0::width={self.width // 2} sink_0::height={self.height} "
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f"sink_1::xpos={self.width // 2} sink_1::ypos=0 "
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f"sink_1::width={self.width // 2} sink_1::height={self.height} ! "
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f"d3d11convert ! video/x-raw(memory:D3D11Memory),format=RGBA,"
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f"width={self.width},height={self.height} ! {sink} "
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f"uridecodebin uri=file:///{self.video_a} ! queue ! "
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f"d3d11convert ! mix. "
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f"uridecodebin uri=file:///{self.video_b} ! queue ! "
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f"d3d11convert ! mix."
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)
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@dataclass(frozen=True)
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class DevGLPipeline:
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"""Entwicklungspfad ohne D3D11 (explizit gekennzeichnet, kein Normalpfad).
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Nur für CI/Dev ohne Windows-GPU; die Backend-Schnittstelle bleibt
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identisch (§12.6)."""
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video_a: str
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video_b: str
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width: int = 960
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height: int = 540
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def launch_string(self) -> str:
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return (
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f"glvideomixer name=mix ! glimagesink "
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f"uridecodebin uri=file:///{self.video_a} ! queue ! glupload ! mix. "
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f"uridecodebin uri=file:///{self.video_b} ! queue ! glupload ! mix."
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)
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def build_single_video_pipeline(video: str, d3d11: bool = True) -> str:
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"""Minimale Einzelquellen-Pipeline (§36 Nr. 4: Testvideo → Vollbild)."""
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if d3d11:
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return f"uridecodebin uri=file:///{video} ! d3d11convert ! d3d11videosink fullscreen=true"
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return f"uridecodebin uri=file:///{video} ! glupload ! glimagesink"
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def build_compositor_pipeline(video_a: str, video_b: str, d3d11: bool = True) -> str:
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"""Zwei-Quellen-Compositing (§36 Nr. 5: GPU-Mischen ohne CPU-Readback)."""
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if d3d11:
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return D3D11Pipeline(video_a=video_a, video_b=video_b).launch_string()
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return DevGLPipeline(video_a=video_a, video_b=video_b).launch_string()
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def gst_available() -> bool:
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"""True, wenn ein GStreamer-CLI auf dem System liegt (Diagnose, kein Fake)."""
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return shutil.which("gst-launch-1.0") is not None
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