wireplumber & backlight: fix states and support for microphone

[M0streng0]

In these two commits I’ve:

• Fixed the issue where the states were not updating (see issue wireplumber states not working #3672).
• Added a microphone source, allowing us to define format-source and format-source-muted just like with the PulseAudio module. (issue Wireplumber: show source volume #3983).

This feature has been on my wishlist for a long time, and since there hadn’t been any movement on it, I took some free time to dive into the code and implement it. I hope it aligns with Alexis’s coding style!

For PipeWire users, it’s much better to use the WirePlumber protocol directly rather than routing through PulseAudio (which was my previous approach).

Later on I might tackle the format-bluetooth support and open a follow‑up PR…

[M0streng0]

While reconfiguring the backlight module, I discovered it suffers from the same issue as the wireplumber module - the very one I resolved in commit 91e5737. I applied the identical patch, and the backlight module is now functioning correctly.

There may be other modules affected by this same bug; I’ll investigate those later.

Below is the configuration I’m using for this module (backlight).

"backlight": {
  "format-0-9": "󱩎 [░░░░░░░░░░]{percent:>3d}%",
  "format-10-19": "󱩎 [█░░░░░░░░░]{percent:>3d}%",
  "format-20-29": "󱩏 [██░░░░░░░░]{percent:>3d}%",
  "format-30-39": "󱩐 [███░░░░░░░]{percent:>3d}%",
  "format-40-49": "󱩑 [████░░░░░░]{percent:>3d}%",
  "format-50-59": "󱩒 [█████░░░░░]{percent:>3d}%",
  "format-60-69": "󱩓 [██████░░░░]{percent:>3d}%",
  "format-70-79": "󱩔 [███████░░░]{percent:>3d}%",
  "format-80-89": "󱩕 [████████░░]{percent:>3d}%",
  "format-90-99": "󱩖 [█████████░]{percent:>3d}%",
  "format-100": "󰛨 [██████████]{percent:>3d}%",
  "states": {
    "0-9": 0,
    "10-19": 10,
    "20-29": 20,
    "30-39": 30,
    "40-49": 40,
    "50-59": 50,
    "60-69": 60,
    "70-79": 70,
    "80-89": 80,
    "90-99": 90,
    "100": 100
  },
  "tooltip": false
}

[Alexays]

Thanks!

[M0streng0]

Hi! Thank you for the merge. I have also updated the wiki page to reflect the modifications implemented by this PR.