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Added SDL_HINT_HIDAPI_ENUMERATE_ONLY_CONTROLLERS to control whether SDL_hid_enumerate() enumerates all HID devices or only controllers.

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By default SDL will only enumerate controllers, to reduce risk of hanging or crashing on devices with bad drivers and avoiding macOS keyboard capture permission prompts.
This commit is contained in:
Sam Lantinga 2023-05-27 09:37:38 -07:00
parent 77e59d4fa9
commit 0ffeca8a1c
10 changed files with 66 additions and 89 deletions
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28
src/hidapi/SDL_hidapi.c
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@ -30,6 +30,8 @@
#include "SDL_internal.h"
#include "SDL_hidapi_c.h"
#include "../joystick/usb_ids.h"
#include "../SDL_hints_c.h"
/* Initial type declarations */
#define HID_API_NO_EXPORT_DEFINE /* do not export hidapi procedures */
@ -529,7 +531,8 @@ static void HIDAPI_ShutdownDiscovery(void)
/* Platform HIDAPI Implementation */
#define HIDAPI_USING_SDL_RUNTIME
#define HIDAPI_IGNORE_DEVICE(VID, PID) SDL_HIDAPI_ShouldIgnoreDevice(VID, PID)
#define HIDAPI_IGNORE_DEVICE(VID, PID, USAGE_PAGE, USAGE) \
SDL_HIDAPI_ShouldIgnoreDevice(VID, PID, USAGE_PAGE, USAGE)
struct PLATFORM_hid_device_;
typedef struct PLATFORM_hid_device_ PLATFORM_hid_device;
@ -1033,8 +1036,14 @@ static void CopyHIDDeviceInfo(struct hid_device_info *pSrc, struct SDL_hid_devic
#undef WCOPY_IF_EXISTS
static int SDL_hidapi_refcount = 0;
static SDL_bool SDL_hidapi_only_controllers;
static char *SDL_hidapi_ignored_devices = NULL;
static void SDLCALL OnlyControllersChanged(void *userdata, const char *name, const char *oldValue, const char *hint)
{
SDL_hidapi_only_controllers = SDL_GetStringBoolean(hint, SDL_TRUE);
}
static void SDLCALL IgnoredDevicesChanged(void *userdata, const char *name, const char *oldValue, const char *hint)
{
if (SDL_hidapi_ignored_devices) {
@ -1047,9 +1056,22 @@ static void SDLCALL IgnoredDevicesChanged(void *userdata, const char *name, cons
}
}
SDL_bool SDL_HIDAPI_ShouldIgnoreDevice(Uint16 vendor_id, Uint16 product_id)
SDL_bool SDL_HIDAPI_ShouldIgnoreDevice(Uint16 vendor_id, Uint16 product_id, Uint16 usage_page, Uint16 usage)
{
/* See if there are any devices we should skip in enumeration */
if (SDL_hidapi_only_controllers && usage_page) {
if (vendor_id == USB_VENDOR_VALVE) {
/* Ignore the keyboard interface on Steam Controllers */
if (usage == USB_USAGE_GENERIC_KEYBOARD) {
return SDL_TRUE;
}
} else if (usage_page == USB_USAGEPAGE_GENERIC_DESKTOP &&
(usage == USB_USAGE_GENERIC_JOYSTICK || usage == USB_USAGE_GENERIC_GAMEPAD || usage == USB_USAGE_GENERIC_MULTIAXISCONTROLLER)) {
/* This is a controller */
} else {
return SDL_TRUE;
}
}
if (SDL_hidapi_ignored_devices) {
char vendor_match[16], product_match[16];
SDL_snprintf(vendor_match, sizeof(vendor_match), "0x%.4x/0x0000", vendor_id);
@ -1071,6 +1093,7 @@ int SDL_hid_init(void)
return 0;
}
SDL_AddHintCallback(SDL_HINT_HIDAPI_ENUMERATE_ONLY_CONTROLLERS, OnlyControllersChanged, NULL);
SDL_AddHintCallback(SDL_HINT_HIDAPI_IGNORE_DEVICES, IgnoredDevicesChanged, NULL);
#ifdef SDL_USE_LIBUDEV
@ -1216,6 +1239,7 @@ int SDL_hid_exit(void)
}
#endif /* HAVE_LIBUSB */
SDL_DelHintCallback(SDL_HINT_HIDAPI_ENUMERATE_ONLY_CONTROLLERS, OnlyControllersChanged, NULL);
SDL_DelHintCallback(SDL_HINT_HIDAPI_IGNORE_DEVICES, IgnoredDevicesChanged, NULL);
if (SDL_hidapi_ignored_devices) {