(OSX) First draft of joypad driver

apple/OSX/hid_pad.c

@@ -0,0 +1,106 @@
+/*  RetroArch - A frontend for libretro.
+ *  Copyright (C) 2013 - Jason Fetters
+ * 
+ *  RetroArch is free software: you can redistribute it and/or modify it under the terms
+ *  of the GNU General Public License as published by the Free Software Found-
+ *  ation, either version 3 of the License, or (at your option) any later version.
+ *
+ *  RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+ *  without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ *  PURPOSE.  See the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along with RetroArch.
+ *  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <IOKit/hid/IOHIDManager.h>
+#include "../RetroArch/apple_input.h"
+
+static IOHIDManagerRef g_hid_manager;
+
+static CFMutableDictionaryRef hu_CreateDeviceMatchingDictionary( UInt32 inUsagePage, UInt32 inUsage )
+{
+   // create a dictionary to add usage page/usages to
+   CFMutableDictionaryRef result = CFDictionaryCreateMutable(kCFAllocatorDefault, 0, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks );
+   if (!result) return 0;
+
+   CFNumberRef pageCFNumberRef = CFNumberCreate(kCFAllocatorDefault, kCFNumberIntType, &inUsagePage);
+   CFDictionarySetValue(result, CFSTR(kIOHIDDeviceUsagePageKey), pageCFNumberRef);
+   CFRelease(pageCFNumberRef);
+
+   CFNumberRef usageCFNumberRef = CFNumberCreate(kCFAllocatorDefault, kCFNumberIntType, &inUsage);
+   CFDictionarySetValue(result, CFSTR(kIOHIDDeviceUsageKey), usageCFNumberRef);
+   CFRelease(usageCFNumberRef);
+
+   return result;
+}
+
+static void hid_device_attached(void* inContext, IOReturn inResult, void* inSender, IOHIDDeviceRef inDevice)
+{
+}
+
+static void hid_device_removed(void* inContext, IOReturn inResult, void* inSender, IOHIDDeviceRef inDevice)
+{
+}
+
+static void hid_input_callback(void* inContext, IOReturn inResult, void* inSender, IOHIDValueRef inIOHIDValueRef)
+{
+   IOHIDElementRef ref = IOHIDValueGetElement(inIOHIDValueRef);
+
+   uint32_t type = IOHIDElementGetType(ref);
+   uint32_t page = IOHIDElementGetUsagePage(ref);
+   uint32_t use = IOHIDElementGetUsage(ref);
+
+   if (type == 2 && page == 9)
+   {
+      int state = (int)IOHIDValueGetIntegerValue(inIOHIDValueRef);
+
+      if (state)  g_current_input_data.pad_buttons[0] |= (1 << use);
+      else        g_current_input_data.pad_buttons[0] &= ~(1 << use);
+   }
+   else if (page == 1)
+   {
+/*      static const uint32_t axis_use_ids[4] = { 48, 49, 50, 53 };
+      for (int i = 0; i < 4; i ++)
+      {
+         if (use == axis_use_ids[i])
+         {
+            int state = (int)IOHIDValueGetIntegerValue(inIOHIDValueRef);
+            printf("axis %d %d\n", i, state);
+         }
+      }*/
+   }
+}
+
+void osx_pad_init()
+{
+   if (!g_hid_manager)
+   {
+      g_hid_manager = IOHIDManagerCreate(kCFAllocatorDefault, kIOHIDOptionsTypeNone);
+
+      CFDictionaryRef matchingCFDictRef = hu_CreateDeviceMatchingDictionary(kHIDPage_GenericDesktop, kHIDUsage_GD_Joystick);
+      IOHIDManagerSetDeviceMatching(g_hid_manager, matchingCFDictRef);
+      CFRelease(matchingCFDictRef);
+
+      IOHIDManagerRegisterDeviceMatchingCallback(g_hid_manager, hid_device_attached, 0);
+      IOHIDManagerRegisterDeviceRemovalCallback(g_hid_manager, hid_device_removed, 0);
+      IOHIDManagerScheduleWithRunLoop(g_hid_manager, CFRunLoopGetCurrent(), kCFRunLoopDefaultMode);
+
+      IOHIDManagerOpen(g_hid_manager, kIOHIDOptionsTypeNone);
+      IOHIDManagerRegisterInputValueCallback(g_hid_manager, hid_input_callback, 0);
+   }
+}
+
+void osx_pad_quit()
+{
+   if (g_hid_manager)
+   {
+      IOHIDManagerClose(g_hid_manager, kIOHIDOptionsTypeNone);
+      IOHIDManagerUnscheduleFromRunLoop(g_hid_manager, CFRunLoopGetCurrent(), kCFRunLoopDefaultMode);
+      
+      CFRelease(g_hid_manager);
+   }
+
+   g_hid_manager = 0;
+}
+

apple/RetroArch/apple_joypad.c

@@ -23,6 +23,8 @@
 #include "../iOS/input/BTStack/btpad_ps3.c"
 #include "../iOS/input/BTStack/btpad_wii.c"
 #include "../iOS/input/BTStack/btpad_queue.c"
+#elif defined(OSX)
+#include "../OSX/hid_pad.c"
 #endif
 
 

apple/RetroArch/main.m

@@ -524,6 +524,9 @@ int main(int argc, char *argv[])
       [self chooseCore];
 
    _wantReload = false;
+   
+   extern void osx_pad_init();
+   osx_pad_init();
 }
 
 - (BOOL)applicationShouldTerminateAfterLastWindowClosed:(NSApplication *)theApplication