v0.19 design goals

[roderickvd]

This is a tracking issue with design goals for v0.19:

• Migrate to Rust 2024
• Work out extension traits
  • RAW mode on WASAPI (WASAPI: Raw stream mode #1173)
  • Control panel on ASIO (ASIO: open control panel #1074)
  • Set identifying stream properties on PipeWire (Pipewire: API to set identifying properties #1186)
• Exclusive mode on CoreAudio & WASAPI (Support Exclusive Mode #106)
• Force / passthrough mode on PipeWire
• Native DSD on WASAPI
• Normalize stream lifecycle: play/pause → start/pause/stop with draining stop (Inconsistent stream auto-play behavior #603)
• Software pause on ALSA ([Request] Sleep thread on pause #785)
• Input streams on WASM (Add support for input streams to webaudio host #412, What would it take to make WebAssembly audio inputs happen? #813, In Wasm, Only Output Can be Used ? #868)
• Refactor SupportedConfig types (SupportedStreamConfig(Range) API inconsistencies - can we have a SupportedStreamConfig.try_with_fixed_buffer_size? #956)
  • Consider merging various types (How to handle zero channels in SupportedStreamConfig? #676)
  • Consider distinguishing discrete & continuous sample rates
• Refactor BufferSize with range support (Consider adding a BufferSize::Near variant (alternative to Default and Fixed) #447, Reviewing and deciding upon a default buffer size strategy for ALSA #446, [WASAPI] Using fixed buffer size when the only available output config shows 'Unknown' buffer size ? #534)
• Device across thread boundaries (Send + Sync) (Provide the tools to pass devices (and the rest) around across Send/Sync boundaries #435)
• Duplex stream API (Duplex Stream Support #349, Plan for implementing an ALSA duplex API #628)

Target date: when it's done; feature set may change at any time.