Metv: a Journey from C and Xine to Rust and Gstreamer, Via D

MeTV A Journey from C and Xine to Rust and Gstreamer, via D

Russel Winder

@russel_winder [email protected] https://www.russel.org.uk

● Ex theoretical physicist ● Ex Independent consultant

● Ex UNIX systems programmer ●

● Ex analyst Ex academic:

– ● Parallel programming Ex author

– Software development and programming ● – Ex expert witness HCI, UI, UX

● ● Ex Company director Ex trainer

● Versions → 1.3.7 ● Version 2

– – Michael Lamothe Full client server PVR

– C code using Xine or VLC ● Version 1.4

– – Some C++ Attempt to keep Me TV – Linux DVB API used direct going in the face of no C++

– developer SQLite

● What: ● How:

– – IPL on ITV4 Debian package didn’t really

– Autumn Internationals on work – BBC and ITV Compiling 2.0.0 and 1.4.0

– Six Nations on BBC and didn’t really work – ITV Compiling 1.3.7 worked

● GTK+2 → GTK+3

● Xine/VLC → Gstreamer

● C++ → C++14 ( → C++17)

● D is a better C++ with GC ● GtkD a D binding generated

● from GIR files No nice IDE as yet ● Includes GstreamerD, and MPEG-TS

● Rust is a non-GC language ● gtk-rs and gstreamer-rs. that is far, far better than C

● D is slightly nicer than Rust ● Rust is become the

● standard for GTK+ and D and Rust are far better Gstreamer work than C++

Rust has one huge win over D: Executors, channels, and futures on the GTK event loop.

Copyright © 2018 Russel Winder 15 let context = glib::MainContext::ref_thread_default(); context.spawn_local({ let c_w = control_window.clone(); message_channel.for_each(move |message| { match message { Message::FrontendAppeared { fei } => add_frontend(&c_w, &fei), Message::FrontendDisappeared { fei } => remove_frontend(&c_w, &fei), } Ok(()) }).map(|_| ()) });

Reactive architecture.

Russel Winder

@russel_winder [email protected] https://www.russel.org.uk

Russel Winder

@russel_winder [email protected] https://www.russel.org.uk