## Link to GitHub Issue or related Pull Request, if one exists
n/a
## Description of change
- Replace unnecessary precision timers with standard sleeps to reduce
wakeups and background CPU usage.
- Reuse buffers in raw input, touchscreen, and HID output paths to
eliminate steady-state allocations.
- Pre-index HID button groups and correctly process batched HID reports.
No functional changes.
## Testing
## Link to GitHub Issue or related Pull Request, if one exists
Regressed by #793
## Description of change
Due to lock inversion, when binding an analog axis as a button, spice
deadlocks. Fix that.
Also create a separate `unordered_map` that keeps track of device
handles so that `WM_INPUT` handle can look up devices without having to
acquire the larger `devices_mutex` which could be held by (potentially)
lengthy operations like hotplug.
Fix more synchronization issues around hotplug. Latent bug exposed by
MIDI 2.0 issues.
## Testing
## Link to GitHub Issue or related Pull Request, if one exists
#616
## Description of change
Adds preliminary support for XInput controllers. Enough to manually bind
buttons and map analogs.
## Link to GitHub Issue or related Pull Request, if one exists
Fixes#563
## Description of change
When buttons are presented as NotRange and instead an array of single
buttons, we are calling `HidP_GetUsages` expecting at most one result
back, but in reality we need to expect all possible buttons on that
usage page since `HidP_GetUsages` returns all buttons in the usage page
+ link collection which would be the entire array of buttons - see
documentation for `HidP_GetUsages` on MSDN.
## Testing
Tested with my own controller modifying USB descriptors... more
controller testing is needed.
bicarus