api/joy: implement a central joystick worker

- Make the dinput handle a singleton also across module boundaries.
- Provide axis values per connected stick.
- Robustify in case of sudden unplug.

1 files changed, 24 insertions, 0 deletions

diff --git a/opentrack/win32-joystick-shortcuts.cpp b/opentrack/win32-joystick-shortcuts.cpp
new file mode 100644
index 00000000..44659b7e
--- /dev/null
+++ b/opentrack/win32-joystick-shortcuts.cpp
@@ -0,0 +1,24 @@
+#include "win32-joystick-shortcuts.hpp"
+
+LPDIRECTINPUT8& win32_joy_ctx::dinput_handle()
+{
+    (void) CoInitialize(nullptr);
+    
+    static LPDIRECTINPUT8 dinput_handle_ = nullptr;
+    
+    if (dinput_handle_ == nullptr)
+        (void) DirectInput8Create(GetModuleHandle(nullptr),
+                                  DIRECTINPUT_VERSION,
+                                  IID_IDirectInput8,
+                                  (void**) &dinput_handle_,
+                                  nullptr);
+    
+    return dinput_handle_;
+}
+
+std::unordered_map<QString, std::shared_ptr<win32_joy_ctx::joy>>& win32_joy_ctx::joys()
+{
+    static std::unordered_map<QString, std::shared_ptr<joy>> js;
+    
+    return js;
+}