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Add support for USB HID keyboard over AOAv2

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This provides a better input experience, by simulating a physical
keyboard. It converts SDL keyboard events to proper HID events, and send
them over AOAv2.

This is a rewriting and bugfix of the origin code from @amosbird:
<https://github.com/Genymobile/scrcpy/issues/279#issuecomment-453819354>

The feature is enabled the command line option -K or --hid-keyboard,
and is only available on Linux, over USB.

Refs <https://source.android.com/devices/accessories/aoa2#hid-support>
Refs <https://www.usb.org/sites/default/files/hid1_11.pdf>

PR #2632 <https://github.com/Genymobile/scrcpy/pull/2632>

Signed-off-by: Romain Vimont <rom@rom1v.com>
This commit is contained in:
Alynx Zhou
2021-09-10 18:57:35 +08:00
committed by Romain Vimont
parent f7d1efdf1d
commit 207082977a
11 changed files with 939 additions and 11 deletions
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app/scrcpy.1
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@@ -82,6 +82,14 @@ Start in fullscreen.
.B \-h, \-\-help
Print this help.
.TP
.B \-K, \-\-hid\-keyboard
Simulate a physical keyboard by using HID over AOAv2.
This provides a better experience for IME users, and allows to generate non-ASCII characters, contrary to the default injection method.
It may only work over USB, and is currently only supported on Linux.
.TP
.B \-\-legacy\-paste
Inject computer clipboard text as a sequence of key events on Ctrl+v (like MOD+Shift+v).