6 notes
How to bridge Rust and Swift for a GPU tile engine: Cargo workspace setup, C-ABI FFI with cbindgen, static library linking in SwiftPM, and practical patterns from Astropad's liquid-next codebase.
Eliminate all CPU pixel copies in a video streaming pipeline using IOSurface, Metal textures, and CVMetalTextureCache. The technique that turns 50ms latency into 5ms on Apple Silicon's unified memory architecture.
Build a multiplexed QUIC transport layer using Apple's Network.framework for remote desktop streaming. Covers reliable streams for control, unreliable datagrams for video, fragmentation, and latency measurement.
Configure VideoToolbox for ultra-low latency HEVC/H.264 encoding on Apple Silicon. Covers real-time settings, parameter set extraction, bitrate control, and keyframe management for remote desktop streaming.
How to build a high-performance screen capture pipeline using Apple's ScreenCaptureKit framework — the same API used by Astropad Workbench. Covers discovery, filtering, configuration, IOSurface zero-copy, and frame status handling.
A comprehensive reverse engineering analysis of Astropad Workbench (codename Stargate), revealing the internal architecture of the LIQUID protocol — a Rust-based tile rendering engine using QUIC transport, GPU-accelerated diffing, and adaptive H.264/HEVC encoding.