SPDX standardizes how source code conveys its copyright and licensing
information. See https://spdx.github.io/spdx-spec/1-rationale/ . SPDX
tags are adopted in many large projects, including things like the Linux
kernel.
Android doesn't report values for the inputs generated by FullAnalogInput so
there isn't a reason to add them as such. This also avoids a bug(for android)
where if there are three inputs(say 12, 11, and 121), and you generate a FullAnalogInput
with 12/11 then it will create another input with the name 121 which can cause conficts
with the real 121 input. This is probably not an issue on PC since most Axis inputs
are named and not numbered.
The SDL backend crashes when you close a joystick after SDL_Quit has
been called. Some backends don't need to be shutdown and
re-initialized everytime, we can just ask to enumerate devices again.
This makes the device ID assigning code common to all backends, by
moving it to AddDevice() instead of copy-pasting or replicating
the logic in the backends.
Also, to prepare for hotplugging, instead of relying on a name usage
count, the new ID assigning system always starts from ID 0 and tries
to assign the first ID that is not used.
Small cleanup by using std::shared_ptr and getting rid of
ciface.Devices() which just returned the m_devices (which defeats the
point of making m_devices protected).
Incidentally, this should make the code safer when we have
different threads accessing devices in the future (for hotplug?).
A lot of code use Device references directly so there is
no easy way to remove FindDevice() and make those unique_ptrs.
Previously, the devices vector would be passed to all backends. They
would then manually push_back to it to add new devices. This was fine
but caused issues when trying to add synchronisation.
Instead, backends now call AddDevice() to fill m_devices so that it is
not accessible from the outside.
Lets the user set the following in intervals of 10 between 10 and 100;
- Stick/Radius (default 100,000000)
- Triggers/Threshold (default 90,000000)
- Tilt/Modifier/Range (default 50,000000) + mapped Tilt/Modifier button
to the configurations for wiimotes & nunchuks
