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Trigger connected gamepads on start

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Trigger SDL_CONTROLLERDEVICEADDED for all gamepads already connected
when scrcpy starts. We want to handle both the gamepads initially
connected and the gamepads connected while scrcpy is running.

It is a bit racy, because a device may be added after the controller
subsystem initialization, but before the call to list the joysticks. In
that case, a single device may in theory be detected as added twice.
This should be harmless though (the second initialization will just fail
without major impact).
This commit is contained in:
Romain Vimont 2024-09-06 23:08:08 +02:00
parent 9be3a68ac6
commit 1c326c9330
1 changed files with 20 additions and 0 deletions
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20
app/src/scrcpy.c
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@ -322,6 +322,21 @@ scrcpy_generate_scid(void) {
return sc_rand_u32(&rand) & 0x7FFFFFFF;
}
static void
init_sdl_gamepads(void) {
// Trigger a SDL_CONTROLLERDEVICEADDED event for all gamepads already
// connected
int num_joysticks = SDL_NumJoysticks();
for (int i = 0; i < num_joysticks; ++i) {
if (SDL_IsGameController(i)) {
SDL_Event event;
event.cdevice.type = SDL_CONTROLLERDEVICEADDED;
event.cdevice.which = i;
SDL_PushEvent(&event);
}
}
}
enum scrcpy_exit_code
scrcpy(struct scrcpy_options *options) {
static struct scrcpy scrcpy;
@ -836,6 +851,11 @@ aoa_complete:
timeout_started = true;
}
bool use_gamepads = true;
if (use_gamepads) {
init_sdl_gamepads();
}
ret = event_loop(s);
LOGD("quit...");