Replace mpg123 with mpv

[stefets]

Context

• mpg123 support only mp3/mp2/mp1 files.
• mpv.io support multiple file type and can play videos
  • It is possible to remotely control mpv like mpg123 -R

Use case

I want to start audio and video from MIDI hardware (Keyboard, PK5 etc...)

Tasks

• Creates an adapter between mididings and mpv
• Creates a tiny Python wrapper for mpv.io
• Start process outside mididings and communicate with socket
  • mpv --input-ipc-server=/tmp/mpv.sock --idle=yes
  • Implement events with observability
  • Implement Play, Pause, Mute etc...
  • Implement Playlist

MPG123

• Remove the mpyg321 wrapper for mpg123 dependency