pocketbook: support "extended" key events

[benoit-pierre]

Only for device running with SDK >= 6.

Close #12703.

---

This change is 

[NiLuJe]

Reviewed 2 of 2 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @benoit-pierre)

[tommiv]

Hey @benoit-pierre, me again. I'm still running an ad-hoc patch you've sent here koreader/koreader-base#1970 (comment) and I want to report a crash during using it.

The crash is super rare (3 books finished, 2 times crashed, so far) and unfortunately I could not deliberately reproduce it.

My observations are: it's not caused by reading itself. During my reading sessions I use different ways of turning pages (hardware on-device buttons, touch screen and designated right-center area, touch screen and a custom right-bottom corner command, and The Gamepad) – it works great and never crashed. Also I'm able to use highlights with touching and dragging over the screen, no crashed either. I believe, but not entirely sure, that both times it threw, I was traversing through some menus like "book description" in the library view, not the book reader view.

Unfortunately, I only have the last log, the first one happened last week and was truncated. So, here's an excerpt:

11/11/24-23:46:43 DEBUG slot 0 in hold state... 
11/11/24-23:46:43 DEBUG PB event => 31 (EVT_POINTERMOVE), par1: 1371, par2: 1862 
11/11/24-23:46:43 DEBUG PB event => 39 (EVT_MTSYNC), par1: 2, par2: 2 
./luajit: ./ffi/input_pocketbook.lua:144: attempt to perform arithmetic on 'struct iv_mtinfo_s *' and 'number'
stack traceback:
	./ffi/input_pocketbook.lua:144: in function <./ffi/input_pocketbook.lua:108>
	[C]: in function 'ProcessEventLoop'
	./ffi/input_pocketbook.lua:429: in function 'waitForEvent'
	frontend/device/input.lua:1399: in function 'waitEvent'
	frontend/ui/uimanager.lua:1535: in function 'handleInput'
	frontend/ui/uimanager.lua:1590: in function 'run'
	./reader.lua:265: in main chunk
	[C]: at 0x00013f61
Process has been terminated by signal {SIGSEGV::SEGV_MAPERR}
Segmentation fault

And the full session log is attached in a zip.

full-session-crash.log.zip

[benoit-pierre]

@tommiv: updated ffi/inkview_h.lua.

[tommiv]

@benoit-pierre replaced, thanks, I'll let you know if I ever encounter a crash again