Add headset type for Windows MR headsets;

src/api/headset.c

@@ -64,6 +64,7 @@ int l_lovrHeadsetInit(lua_State* L) {
   map_set(&HeadsetTypes, "unknown", HEADSET_UNKNOWN);
   map_set(&HeadsetTypes, "vive", HEADSET_VIVE);
   map_set(&HeadsetTypes, "rift", HEADSET_RIFT);
+  map_set(&HeadsetTypes, "windowsmr", HEADSET_WINDOWS_MR);
 
   map_init(&HeadsetDrivers);
   map_set(&HeadsetDrivers, "fake", DRIVER_FAKE);

src/headset/headset.h

@@ -25,6 +25,7 @@ typedef enum {
   HEADSET_UNKNOWN,
   HEADSET_VIVE,
   HEADSET_RIFT,
+  HEADSET_WINDOWS_MR,
   HEADSET_FAKE
 } HeadsetType;
 

src/headset/openvr.c

@@ -205,6 +205,8 @@ static void openvrInit() {
     state.type = HEADSET_VIVE;
   } else if (!strncmp(buffer, "Oculus", 128)) {
     state.type = HEADSET_RIFT;
+  } else if (!strncmp(buffer, "WindowsMR", 128)) {
+    state.type = HEADSET_WINDOWS_MR;
   } else {
     state.type = HEADSET_UNKNOWN;
   }