Add "fifo" output plugin for Windows binary

[guizhenwei]

Currently no fifo output plugin in the official released MPD.exe for windows platform. It would be good to have this plugin enabled in the default release for win32.

[MaxKellermann]

How is this supposed to work on Windows?

[guizhenwei]

I'm sorry for the uncertain. After a bit search, i found this: https://en.wikipedia.org/wiki/Named_pipe (Section: In Windows)

I'm still not sure if it's feasible. If not, please close this issue.

[Pablo1107]

How can this be implemented? I'm trying to get cava working with mpd fifo output in WSL.

[MayCXC]

@Pablo1107 This can be done by piping the "Stereo Mix" playback device in windows to a fifo from socat from fmedia.exe from wsl. First go to "Sounds" > playback > Stereo Mix > Properties > Listen > make sure "Listen to this device" is unchecked. Then you can start the fifo with socat PIPE:/tmp/mpd.fifo EXEC:"/mnt/d/Applications/fmedia/fmedia.exe --notui --record --dev-loopback=1 --format=int16 --rate=44100 --channels=2 -o @stdout.wav". This pipes in all system audio though, not just mpd, I use it with ncmpcpp like the instructions here.