Using Rust to Process ILDA (Laser Video) Files

Transcript

1. Using Rust with ILDA (Laser Video) Files Lukas Prasuhn 2019/07/03 @ Rust LT #6
2. About me - Software Engineer @ Ubie - Kotlin / Spring Boot - Typescript / React - Ruby / Rails - 14y in Japan from Germany lukasjapan @cvguy84
3. ILDA files - Video for Laser Projectors - Fairly low level - Move - Color - Blanking (Laser On/Off)
4. Making command line tools for ILDA files - No satisfactory OSS solution - Mostly players & libraries - Windows tools that you need to download from forums - Streaming - Unix command feeling - Do one thing but do it good - Connect via pipes - … - Controlling home brew projector lukasjapan/ilda-tools
5. Why in Rust? - Controlling a homebrew projector from Raspberry Pi - Statically compiled - Performance - Library ecosystem - Cargo - Crates.io - Ruling out other choices - Go → less performant - C++ → the build system is … - Kotlin Native → origin is JVM, production ready?
6. - All purpose command line argument library - Supports - Flags (-v) - Short names (-x yy) - Long names (--foo=bar) - Automatic help generation Used crate for command line argument processing clap
7. Used crate to display ILDA data with OpenGL - OpenGL wrapper for Rust - Window creation (through winit) - Event processing - Vertex mapping via macro glium
9. Used crate(s) to help converting from SVG to ILDA - usvg - Simplify svg files - Reader: svgdom - lyon_geom - Part of a bigger project (lyon) - Svg calculation tools (bezier curves, etc) usvg, lyon_geom
10. Used crate to create wav files - Projector takes analog signal - DAC - Digital Analog Converter - Sound card is a DAC - Convert ILDA files to WAV - Get properly timed analog signal from sound card - hound - read/write wav headers and content hound Sound Card .wav
12. Cargo and crates.io - Rusts dependency manager - Files - Dependency definition file (cargo.toml) - Lock file (cargo.lock) - In other languages - Ruby: bundler + rubygems - JS: npm/yarn + npm packages - PHP: composer + packagist - … - Thoughts - As easy to use as in other languages - Crates are sufficiently mature - Finally this kind of solution arrived for a statically compiled language
13. Lets use Rust!