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Added SDL_HINT_HIDAPI_IGNORE_DEVICES to specify devices that should be ignored in SDL_hid_enumerate()

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This commit is contained in:
Sam Lantinga 2023-05-24 22:37:38 -07:00
parent e6834a1535
commit 007c36e513
9 changed files with 84 additions and 21 deletions
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39
src/hidapi/SDL_hidapi.c
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@ -527,6 +527,8 @@ static void HIDAPI_ShutdownDiscovery(void)
/* Platform HIDAPI Implementation */
#define HIDAPI_IGNORE_DEVICE(VID, PID) SDL_HIDAPI_ShouldIgnoreDevice(VID, PID)
struct PLATFORM_hid_device_;
typedef struct PLATFORM_hid_device_ PLATFORM_hid_device;
@ -1029,6 +1031,7 @@ static void CopyHIDDeviceInfo(struct hid_device_info *pSrc, struct SDL_hid_devic
#undef WCOPY_IF_EXISTS
static int SDL_hidapi_refcount = 0;
static char *SDL_hidapi_ignored_devices = NULL;
static void SDL_SetHIDAPIError(const wchar_t *error)
{
@ -1041,6 +1044,33 @@ static void SDL_SetHIDAPIError(const wchar_t *error)
}
}
static void SDLCALL IgnoredDevicesChanged(void *userdata, const char *name, const char *oldValue, const char *hint)
{
if (SDL_hidapi_ignored_devices) {
SDL_free(SDL_hidapi_ignored_devices);
}
if (hint && *hint) {
SDL_hidapi_ignored_devices = SDL_strdup(hint);
} else {
SDL_hidapi_ignored_devices = NULL;
}
}
SDL_bool SDL_HIDAPI_ShouldIgnoreDevice(Uint16 vendor_id, Uint16 product_id)
{
/* See if there are any devices we should skip in enumeration */
if (SDL_hidapi_ignored_devices) {
char vendor_match[16], product_match[16];
SDL_snprintf(vendor_match, sizeof(vendor_match), "0x%.4x/0x0000", vendor_id);
SDL_snprintf(product_match, sizeof(product_match), "0x%.4x/0x%.4x", vendor_id, product_id);
if (SDL_strcasestr(SDL_hidapi_ignored_devices, vendor_match) ||
SDL_strcasestr(SDL_hidapi_ignored_devices, product_match)) {
return SDL_TRUE;
}
}
return SDL_FALSE;
}
int SDL_hid_init(void)
{
int attempts = 0, success = 0;
@ -1050,6 +1080,8 @@ int SDL_hid_init(void)
return 0;
}
SDL_AddHintCallback(SDL_HINT_HIDAPI_IGNORE_DEVICES, IgnoredDevicesChanged, NULL);
#ifdef SDL_USE_LIBUDEV
if (SDL_getenv("SDL_HIDAPI_JOYSTICK_DISABLE_UDEV") != NULL) {
SDL_LogDebug(SDL_LOG_CATEGORY_INPUT,
@ -1193,6 +1225,13 @@ int SDL_hid_exit(void)
}
#endif /* HAVE_LIBUSB */
SDL_DelHintCallback(SDL_HINT_HIDAPI_IGNORE_DEVICES, IgnoredDevicesChanged, NULL);
if (SDL_hidapi_ignored_devices) {
SDL_free(SDL_hidapi_ignored_devices);
SDL_hidapi_ignored_devices = NULL;
}
return result;
}