Add presentation on QUIC

quic/Makefile

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+all:
+	make slide slideshow
+
+slide:
+	pandoc -t beamer quic.md -f markdown-implicit_figures -V colorlinks=true -V linkcolor=blue -V urlcolor=red -o quic.pdf
+
+slideshow:
+	pandoc -t beamer quic.md -f markdown-implicit_figures -V colorlinks=true -V linkcolor=blue -V urlcolor=red -i -o quic-slideshow.pdf
+
+view:
+	zathura --mode=presentation quic.pdf &

quic/quic.md

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+---
+title:
+- QUIC with GStreamer & Rust
+author:
+- Sanchayan Maity
+theme:
+- default
+classoption:
+- aspectratio=169
+---
+
+# Who
+
+- Who am I?
+  * Embedded Systems background
+  * Prefer C, Haskell and Rust
+  * Organize and speak at Rust and Haskell meet-ups in Bangalore
+- Work?
+  * Software Engineer @ [asymptotic](https://asymptotic.io/)
+  * Open source consulting firm based out of Bangalore and Toronto
+  * Work on low level systems software centred around multimedia
+  * GStreamer, PipeWire, PulseAudio
+  * Language Polyglots
+
+
+# Open source contributions
+
+- [GStreamer](https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests?scope=all&state=all&author_username=SanchayanMaity)
+- [gst-plugins-rs](https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs/-/merge_requests?scope=all&state=all&author_username=SanchayanMaity)
+- [PipeWire](https://gitlab.freedesktop.org/pipewire/pipewire/-/merge_requests?scope=all&state=all&author_username=SanchayanMaity)
+- [PulseAudio](https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/merge_requests?scope=all&state=all&author_username=SanchayanMaity)
+- [Linux](https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/log/?qt=author&q=Sanchayan+Maity)
+- [u-boot](https://source.denx.de/u-boot/u-boot/-/commits/master?search=Sanchayan%20Maity)
+
+# Agenda
+
+- QUIC which is a UDP-Based Multiplexed and Secure Transport and standardized in RFC 9000
+- Whirlwind tour of GStreamer
+- QUIC implementations in Rust
+- QUIC support in GStreamer
+- Demo
+- Future work
+
+# QUIC
+
+- QUIC is pronounced exactly like the English word "quick"
+- Not an acronym
+- Reliable and secure transport protocol
+- Addresses some of the known shortcomings of doing HTTP/2 over TCP and TLS
+- Standardized QUIC in RFC 9000
+- Supported by RFC 8999, RFC 9001 and RFC 9002
+
+# Building on shoulders of giants
+
+- HTTP/2 [RFC7540](https://www.rfc-editor.org/rfc/rfc7540) published in May 2015
+- Makes use of multiplexing
+  - Multiple logical streams over same logical connection
+  - Better congestion control
+  - Makes better use of TCP with bandwidth saturation
+  - Less bandwidth consumption due to header compression
+
+
+# Head of line blocking[^1]
+
+![*_HOL Blocking_*](HOL_blocking.png){width=80%}
+
+
+[^1]: [Head of line blocking](https://en.wikipedia.org/wiki/Head-of-line_blocking)
+
+# Protocol
+
+- Something new?
+- TCP?
+- UDP?
+
+# Security/encryption
+
+- No clear text version of the protocol
+- Negotiation employs cryptography and security with TLS 1.3
+
+# QUIC
+
+- Implemented on top of UDP
+- Uses UDP port numbers
+- Implements re-transmission, congestion control among others
+- Logical streams similar to HTTP/2
+  - In-order
+  - Reliable
+  - Different streams can be out-of-order
+- Flow control
+- Fast handshakes (0-RTT and 1-RTT)
+
+# GStreamer
+
+- Multiplatform Pipeline based multimedia framework
+- Bindings for various languages
+- Allows building complex media processing workflows
+- Some applications
+  * PiTiVi (Video Editor)
+  * amaroK, Banshee, Clementine (audio players)
+  * Empathy (VOIP and video conferencing)
+  * GstLAL (gravitational wave data analysis)
+  * Rygel (DLNA streaming server and renderer)
+  * Totem (movie player for the GNOME desktop)
+
+
+# Simple pipeline
+
+  ```bash
+  gst-launch-1.0 videotestsrc ! autovideosink
+  gst-launch-1.0 audiotestsrc ! autoaudiosink
+  ```
+
+# Media pipeline[^2]
+
+![*_Simple Player_*](simple-player.png){width=80%}
+
+[^2]: [Dynamic Pipelines](https://gstreamer.freedesktop.org/documentation/tutorials/basic/dynamic-pipelines.html?gi-language=c)
+
+# Rust implementations
+
+- [quinn-rs](https://github.com/quinn-rs/quinn)
+- [quiche](https://github.com/cloudflare/quiche)
+- [s2n-quic](https://github.com/aws/s2n-quic)
+- [neqo](https://github.com/mozilla/neqo)
+- [msquic](https://github.com/microsoft/msquic)
+
+# QUIC in GStreamer
+
+- Prior work
+  - [gst-quic-transport](https://github.com/bbc/gst-quic-transport)
+- `quinnquicsink` and `quinnquicsrc` (Merged just a month ago)
+- Written in Rust
+- Uses [quinn-rs](https://github.com/quinn-rs/quinn)
+- New elements `quinnquicmux` and `quinnquicdemux` to support stream multiplexing
+
+# Audio demo
+
+```bash
+gst-launch-1.0 -v -e audiotestsrc blocksize=4096 ! \
+audio/x-raw,format=S16LE,rate=48000,channels=2,layout=interleaved ! \
+opusenc ! quinnquicsink use-datagram=false secure-connection=false
+```
+
+```bash
+gst-launch-1.0 -v -e audiotestsrc blocksize=4096 ! \
+audio/x-raw,format=S16LE,rate=48000,channels=2,layout=interleaved ! \
+opusenc ! quinnquicsink use-datagram=false secure-connection=false
+```
+
+# Video demo
+
+[quin-quic-mux](https://git.sanchayanmaity.net/sanchayanmaity/quinn-quic-mux)
+
+- Shows stream and datagram multiplexed on same connection
+- Merge request: [!1634](https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs/-/merge_requests/1634)
+
+# Future work
+
+- Handling flow control
+- Congestion control
+- [RTP over QUIC](https://datatracker.ietf.org/doc/draft-ietf-avtcore-rtp-over-quic/)
+- [Media over QUIC](https://datatracker.ietf.org/group/moq/about/)
+
+# References
+
+- [RFC 9000](https://www.rfc-editor.org/rfc/rfc9000.html)
+- [Road to QUIC](https://blog.cloudflare.com/the-road-to-quic)
+- [0-RTT](https://blog.cloudflare.com/even-faster-connection-establishment-with-quic-0-rtt-resumption/)
+
+# Questions
+
+- Reach out on
+  * Email: sanchayan@sanchayanmaity.net
+  * Mastodon: [sanchayanmaity.com](https://sanchayanmaity.com/@sanchayan)
+  * Telegram: https://t.me/SanchayanMaity
+  * Blog: [sanchayanmaity.net](https://sanchayanmaity.net/)