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ROADMAP.md

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For 2.2

Done

  • Separate language core (#2397)
  • Online version (#2397)
  • Switch to dune
  • Separate standard library (in pure liq)
  • support for multi-track audio
  • live switch with ffmpeg encoded content
  • deprecate "!" and ":=" in favor of x.get / x.set

For 2.2

  • switch to immutable content for metadata
  • Add script tooling, prettier etc.
  • switch to immutable content for frames (#2364)
    • frame should be changed to extensible arrays (a bit like Strings) instead of filling a buffer
    • take the opportunity to change the handling of track boundaries (currently boundary = we have a partial fill, which has quite messy corner cases)

For 2.3

Done:

  • Rewrite streaming loop
  • rewrite the clock system
    • the code is unreadable and overengineered ⇒ simplify it
    • we want to get rid of the assumption clock = thread

In progress

  • Optimize runtime: start time, typing and memory usage

TODO

  • remove requests and use sources instead everywhere (a request is a source with one track [or more])
    • Precise scheduling with queue.push, etc.: we could make the track available at some precise time if requests were sources...
    • this may allow stuff like append more easily

Maybe

  • Update the book

For 2.4

Maybe

  • support for ffmpeg subtitles
  • use OCaml 5 threads (#2879)
  • Add support for modules, load minimal API by default

FOSDEM 2023 TODO

  • use source getters for switch in order to be able to play two tracks ever day (#2880)
  • use naive (as in native.liq) implementation of switch (based on source.dynamic)
  • rework buffer.adaptative
  • allow showing graphs (of buffer.adaptative for instance)
  • reimplement video.tile in native liq

Backlog

  • Simple mechanism to tell source how much data will be expected in advance (e.g. 10s with cross) to allow automatic buffer management.
  • Redefine switch-based transitions.
  • javascrtipt/browser support using WebCodecs!
  • refine video support in order to have next liquidshop running on Liquidsoap (dogfooding)
  • native RTMP support (and ensure that HLS output is easy to use)
  • rewrite switch / sequence / etc. operators based on only one binary operator: fallback
    • note: predicates can ben encoded in availability
    • transitions might be tricky... we want to make them on the Liquidsoap side using cross and a tag system to know from which source we come
  • use row variables for methods, using Garrigue's Simple Type Inference for Structural Polymorphism
  • can we reimplement something like melt?