Get all HTPC remote buttons working

[trinitronx]

HTPC "Air mouse" RF Remote

TODO:

• Identify input device
• Get keycode / names via wev, wshowkeys, libinput , libinput debug-events, xkbcli interactive-wayland, xev, or similar
• Patch mpv for missing keys:
  • XF86Back
  • XF86Tools
  • XF86ZoomIn
  • XF86ZoomOut
  • PR: input: Add new keys: Back, Tools, ZoomIn, ZoomOut mpv-player/mpv#12177
• Get MythTV working with keys

Libinput Name	XKB Name	Icon on Remote (NerdFont Unicode)
KEY_FASTFORWARD	XF86AudioForward	󰑟
KEY_REWIND	XF86AudioRewind	󰈑
KEY_PREVIOUSSONG	XF86AudioPrev	󰒫
KEY_NEXTSONG	XF86AudioNext	󰒬
KEY_ZOOMIN	XF86ZoomIn	 +
KEY_ZOOMOUT	XF86ZoomOut	 -
KEY_HOMEPAGE	XF86HomePage	
KEY_BACK	XF86Back	󱞳
KEY_CONFIG	XF86Tools	󰿏
KEY_MAIL	XF86Mail	󰳤
KEY_WWW	XF86WWW	

swaymsg -t get_inputs Identifies remote as:

Input device: MemsArt MA144 RF Controller System Control
  Type: Keyboard
  Identifier: 3141:20737:MemsArt_MA144_RF_Controller_System_Control
  Product ID: 20737
  Vendor ID: 3141
  Active Keyboard Layout: English (US)
  Libinput Send Events: enabled

Input device: MemsArt MA144 RF Controller Consumer Control
  Type: Mouse
  Identifier: 3141:20737:MemsArt_MA144_RF_Controller_Consumer_Control
  Product ID: 20737
  Vendor ID: 3141
  Libinput Send Events: enabled

Input device: MemsArt MA144 RF Controller Consumer Control
  Type: Keyboard
  Identifier: 3141:20737:MemsArt_MA144_RF_Controller_Consumer_Control
  Product ID: 20737
  Vendor ID: 3141
  Active Keyboard Layout: English (US)
  Libinput Send Events: enabled

Input device: MemsArt MA144 RF Controller
  Type: Mouse
  Identifier: 3141:20737:MemsArt_MA144_RF_Controller
  Product ID: 20737
  Vendor ID: 3141
  Libinput Send Events: enabled

Input device: MemsArt MA144 RF Controller
  Type: Keyboard
  Identifier: 3141:20737:MemsArt_MA144_RF_Controller
  Product ID: 20737
  Vendor ID: 3141
  Active Keyboard Layout: English (US)
  Libinput Send Events: enabled

sudo libinput list-devices identifies remote as:

Device:           MemsArt MA144 RF Controller
Kernel:           /dev/input/event5
Group:            7
Seat:             seat0, default
Capabilities:     keyboard 
Tap-to-click:     n/a
Tap-and-drag:     n/a
Tap drag lock:    n/a
Left-handed:      n/a
Nat.scrolling:    n/a
Middle emulation: n/a
Calibration:      n/a
Scroll methods:   none
Click methods:    none
Disable-w-typing: n/a
Disable-w-trackpointing: n/a
Accel profiles:   n/a
Rotation:         0.0

Device:           MemsArt MA144 RF Controller
Kernel:           /dev/input/event6
Group:            7
Seat:             seat0, default
Capabilities:     pointer 
Tap-to-click:     n/a
Tap-and-drag:     n/a
Tap drag lock:    n/a
Left-handed:      disabled
Nat.scrolling:    disabled
Middle emulation: disabled
Calibration:      n/a
Scroll methods:   button
Click methods:    none
Disable-w-typing: n/a
Disable-w-trackpointing: n/a
Accel profiles:   flat *adaptive custom
Rotation:         0.0

Device:           MemsArt MA144 RF Controller Consumer Control
Kernel:           /dev/input/event7
Group:            7
Seat:             seat0, default
Capabilities:     keyboard pointer 
Tap-to-click:     n/a
Tap-and-drag:     n/a
Tap drag lock:    n/a
Left-handed:      n/a
Nat.scrolling:    disabled
Middle emulation: n/a
Calibration:      n/a
Scroll methods:   none
Click methods:    none
Disable-w-typing: n/a
Disable-w-trackpointing: n/a
Accel profiles:   n/a
Rotation:         0.0

Device:           MemsArt MA144 RF Controller System Control
Kernel:           /dev/input/event8
Group:            7
Seat:             seat0, default
Capabilities:     keyboard 
Tap-to-click:     n/a
Tap-and-drag:     n/a
Tap drag lock:    n/a
Left-handed:      n/a
Nat.scrolling:    n/a
Middle emulation: n/a
Calibration:      n/a
Scroll methods:   none
Click methods:    none
Disable-w-typing: n/a
Disable-w-trackpointing: n/a
Accel profiles:   n/a
Rotation:         0.0

Sample mpv input.conf:

# DVB Channels up/down
H cycle dvbin-channel-switch-offset up
K cycle dvbin-channel-switch-offset down
PGUP           cycle dvbin-channel-switch-offset up
PGDWN          cycle dvbin-channel-switch-offset down
ZOOMIN         add video-zoom   0.1         # zoom in
ZOOMOUT        add video-zoom  -0.1         # zoom out
TOOLS          show-text "${playlist}\n${filtered-metadata}"   #  show the playlist & display-tags metadata
BACK           playlist-prev
HOMEPAGE       playlist-next
MAIL           add panscan -0.1             # decrease panscan
WWW            add panscan +0.1             # shrink black bars by cropping the video