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Don't update the device list for devices we know aren't supported 

This should reduce HID enumeration (hitting the USB bus) if for some reason we're getting spammed with false device insert/removal events
This commit is contained in:
Sam Lantinga 2018-08-09 16:04:30 -07:00
parent cf823094a2
commit ab07ce1166
1 changed files with 19 additions and 0 deletions
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19
src/joystick/hidapi/SDL_hidapijoystick.c
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@ -79,6 +79,20 @@ static SDL_HIDAPI_Device *SDL_HIDAPI_devices;
static int SDL_HIDAPI_numjoysticks = 0;
static Uint32 SDL_HIDAPI_last_detect = 0;
static SDL_bool
HIDAPI_IsDeviceSupported(Uint16 vendor_id, Uint16 product_id)
{
int i;
for (i = 0; i < SDL_arraysize(SDL_HIDAPI_drivers); ++i) {
SDL_HIDAPI_DeviceDriver *driver = SDL_HIDAPI_drivers[i];
if (driver->enabled && driver->IsSupportedDevice(vendor_id, product_id, -1, 0, 0)) {
return SDL_TRUE;
}
}
return SDL_FALSE;
}
static SDL_HIDAPI_DeviceDriver *
HIDAPI_GetDeviceDriver(SDL_HIDAPI_Device *device)
{
@ -388,6 +402,11 @@ HIDAPI_IsDevicePresent(Uint16 vendor_id, Uint16 product_id)
{
SDL_HIDAPI_Device *device;
/* Don't update the device list for devices we know aren't supported */
if (!HIDAPI_IsDeviceSupported(vendor_id, product_id)) {
return SDL_FALSE;
}
/* Make sure the device list is completely up to date when we check for device presence */
HIDAPI_UpdateDeviceList();