New features

• Remade and extended the documentation: https://celtera.github.io/libremidi
• Experimental PipeWire back-end

Changes

• MIDI 1 logic refactored across all back-ends to make sure they all behave exactly the same wrt timestamping and filtering.

New features

• Add Debian (bullseye, bookworm, trixie) to the CI to make sure ALSA UMP and RawMidi support gets tested
• Fix iOS support and add iOS CI (thanks @fwcd !)
• Add compatibility with ni-midi2: the libremidi::ump type will convert automatically from / to midi::universal_packet and it is possible to send directly some ni-midi2 data types through libremidi::midi_out
• Added an example of very basic MIDI-CI interoperation with MIDI2.0Workbench: https://github.com/jcelerier/libremidi/blob/master/examples/midi2_interop.cpp
• Observer: add a track_any flag to track MIDI ports that are not reported as being hardware or software.
• UMP: allow send_ump to handle UMP streams, not only single UMP packets.

Bugfixes

• Fix sysex concatenation on WinMM
• Various MIDI 2-related fixes across the entire stack
• Work-in-progress on RawMidi MIDI2 backend - output should work, input not there yet. Testing and reporting issues highly appreciated!
• Some compatibility bugfixes, better detection of available features in cmake

Other

• Revamp and cleanup the cmake backends in separate files for clarity.

• Improvements to timing handling:

  • Added a Custom timestamping mechanism which allows the user to provide a custom callback to run timestamping as close as possible to the event's reception.
  • Added midi_in::absolute_timestamp() to get the origin timestamp for driver-provided ticks as accurately as possible.
    • e.g. in practice this is taking the time just near the ALSA queue creation or WinMM MIDI open.

• Bugfixes in JACK

• Many warning fixes - thanks @lilggamegenius for the extensive work!

• Fix MIDI dump example - thanks @chdiesch!

• Add SOVERSION to dynamic library