Merge OculusSDK 0.3.2 MacOS Source Code

- converted all text files to unix format first,
  allowing to skip all white-changes-only files

9 files changed, 2785 insertions, 0 deletions

diff --git a/LibOVR/Projects/Mac/Xcode/LibOVR.xcodeproj/project.pbxproj b/LibOVR/Projects/Mac/Xcode/LibOVR.xcodeproj/project.pbxproj
new file mode 100644
index 0000000..485af04
--- /dev/null
+++ b/LibOVR/Projects/Mac/Xcode/LibOVR.xcodeproj/project.pbxproj
@@ -0,0 +1,731 @@
+// !$*UTF8*$!

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diff --git a/LibOVR/Projects/Mac/Xcode/LibOVR.xcodeproj/project.xcworkspace/contents.xcworkspacedata b/LibOVR/Projects/Mac/Xcode/LibOVR.xcodeproj/project.xcworkspace/contents.xcworkspacedata
new file mode 100644
index 0000000..6e21728
--- /dev/null
+++ b/LibOVR/Projects/Mac/Xcode/LibOVR.xcodeproj/project.xcworkspace/contents.xcworkspacedata
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>

+<Workspace

+   version = "1.0">

+   <FileRef

+      location = "self:LibOVR.xcodeproj">

+   </FileRef>

+</Workspace>

diff --git a/LibOVR/Src/OVR_OSX_DeviceManager.cpp b/LibOVR/Src/OVR_OSX_DeviceManager.cpp
new file mode 100644
index 0000000..078936a
--- /dev/null
+++ b/LibOVR/Src/OVR_OSX_DeviceManager.cpp
@@ -0,0 +1,360 @@
+/************************************************************************************
+
+Filename    :   OVR_OSX_DeviceManager.cpp
+Content     :   OSX specific DeviceManager implementation.
+Created     :   March 14, 2013
+Authors     :   Lee Cooper
+
+Copyright   :   Copyright 2014 Oculus VR, Inc. All Rights reserved.
+
+Licensed under the Oculus VR Rift SDK License Version 3.1 (the "License"); 
+you may not use the Oculus VR Rift SDK except in compliance with the License, 
+which is provided at the time of installation or download, or which 
+otherwise accompanies this software in either electronic or hard copy form.
+
+You may obtain a copy of the License at
+
+http://www.oculusvr.com/licenses/LICENSE-3.1 
+
+Unless required by applicable law or agreed to in writing, the Oculus VR SDK 
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+*************************************************************************************/
+
+#include "OVR_OSX_DeviceManager.h"
+
+// Sensor & HMD Factories
+#include "OVR_LatencyTestImpl.h"
+#include "OVR_SensorImpl.h"
+#include "OVR_OSX_HMDDevice.h"
+#include "OVR_OSX_HIDDevice.h"
+
+#include "Kernel/OVR_Timer.h"
+#include "Kernel/OVR_Std.h"
+#include "Kernel/OVR_Log.h"
+
+#include <IOKit/hid/IOHIDManager.h>
+#include <IOKit/hid/IOHIDKeys.h>
+
+
+namespace OVR { namespace OSX {
+
+//-------------------------------------------------------------------------------------
+// **** OSX::DeviceManager
+
+DeviceManager::DeviceManager()
+{
+}
+
+DeviceManager::~DeviceManager()
+{
+    OVR_DEBUG_LOG(("OSX::DeviceManager::~DeviceManager was called"));
+}
+
+bool DeviceManager::Initialize(DeviceBase*)
+{
+    if (!DeviceManagerImpl::Initialize(0))
+        return false;
+    
+    // Start the background thread.
+    pThread = *new DeviceManagerThread();
+    if (!pThread || !pThread->Start())
+        return false;
+
+    // Wait for the thread to be fully up and running.
+    pThread->StartupEvent.Wait();
+
+    // Do this now that we know the thread's run loop.
+    HidDeviceManager = *HIDDeviceManager::CreateInternal(this);
+
+    CGDisplayRegisterReconfigurationCallback(displayReconfigurationCallBack, this);
+         
+    pCreateDesc->pDevice = this;
+    LogText("OVR::DeviceManager - initialized.\n");
+
+    return true;
+}
+
+void DeviceManager::Shutdown()
+{
+    LogText("OVR::DeviceManager - shutting down.\n");
+
+    CGDisplayRemoveReconfigurationCallback(displayReconfigurationCallBack, this);
+    
+    // Set Manager shutdown marker variable; this prevents
+    // any existing DeviceHandle objects from accessing device.
+    pCreateDesc->pLock->pManager = 0;
+
+    // Push for thread shutdown *WITH NO WAIT*.
+    // This will have the following effect:
+    //  - Exit command will get enqueued, which will be executed later on the thread itself.
+    //  - Beyond this point, this DeviceManager object may be deleted by our caller.
+    //  - Other commands, such as CreateDevice, may execute before ExitCommand, but they will
+    //    fail gracefully due to pLock->pManager == 0. Future commands can't be enqued
+    //    after pManager is null.
+    //  - Once ExitCommand executes, ThreadCommand::Run loop will exit and release the last
+    //    reference to the thread object.
+    pThread->Shutdown();
+    pThread.Clear();
+
+    DeviceManagerImpl::Shutdown();
+}
+
+ThreadCommandQueue* DeviceManager::GetThreadQueue()
+{
+    return pThread;
+}
+
+ThreadId DeviceManager::GetThreadId() const
+{
+    return pThread->GetThreadId();
+}
+
+bool DeviceManager::GetDeviceInfo(DeviceInfo* info) const
+{
+    if ((info->InfoClassType != Device_Manager) &&
+        (info->InfoClassType != Device_None))
+        return false;
+    
+    info->Type    = Device_Manager;
+    info->Version = 0;
+    info->ProductName = "DeviceManager";
+    info->Manufacturer = "Oculus VR, Inc.";        
+    return true;
+}
+
+DeviceEnumerator<> DeviceManager::EnumerateDevicesEx(const DeviceEnumerationArgs& args)
+{
+    // TBD: Can this be avoided in the future, once proper device notification is in place?
+    pThread->PushCall((DeviceManagerImpl*)this,
+                      &DeviceManager::EnumerateAllFactoryDevices, true);
+
+    return DeviceManagerImpl::EnumerateDevicesEx(args);
+}
+
+void DeviceManager::displayReconfigurationCallBack (CGDirectDisplayID display,
+                                                    CGDisplayChangeSummaryFlags flags,
+                                                    void *userInfo)
+{
+    DeviceManager* manager = reinterpret_cast<DeviceManager*>(userInfo);
+    OVR_UNUSED(manager);
+    
+    if (flags & kCGDisplayAddFlag)
+    {
+        LogText("Display Added, id = %d\n", int(display));
+        manager->EnumerateDevices<HMDDevice>();
+    }
+    else if (flags & kCGDisplayRemoveFlag)
+    {
+        LogText("Display Removed, id = %d\n", int(display));
+        manager->EnumerateDevices<HMDDevice>();
+    }
+}
+
+//-------------------------------------------------------------------------------------
+// ***** DeviceManager Thread 
+
+DeviceManagerThread::DeviceManagerThread()
+    : Thread(ThreadStackSize)
+{    
+}
+
+DeviceManagerThread::~DeviceManagerThread()
+{
+}
+
+int DeviceManagerThread::Run()
+{
+
+    SetThreadName("OVR::DeviceManagerThread");
+    LogText("OVR::DeviceManagerThread - running (ThreadId=0x%p).\n", GetThreadId());
+
+    // Store out the run loop ref.
+    RunLoop = CFRunLoopGetCurrent();
+
+    // Create a 'source' to enable us to signal the run loop to process the command queue.
+    CFRunLoopSourceContext sourceContext;
+    memset(&sourceContext, 0, sizeof(sourceContext));
+    sourceContext.version = 0;
+    sourceContext.info = this;
+    sourceContext.perform = &staticCommandQueueSourceCallback;
+
+    CommandQueueSource = CFRunLoopSourceCreate(kCFAllocatorDefault, 0 , &sourceContext);
+
+    CFRunLoopAddSource(RunLoop, CommandQueueSource, kCFRunLoopDefaultMode);
+
+
+    // Signal to the parent thread that initialization has finished.
+    StartupEvent.SetEvent();
+
+
+    ThreadCommand::PopBuffer command;
+   
+    while(!IsExiting())
+    {
+        // PopCommand will reset event on empty queue.
+        if (PopCommand(&command))
+        {
+            command.Execute();
+        }
+        else
+        {
+            SInt32 exitReason = 0;
+            do {
+
+                UInt32 waitMs = INT_MAX;
+
+                // If devices have time-dependent logic registered, get the longest wait
+                // allowed based on current ticks.
+                if (!TicksNotifiers.IsEmpty())
+                {
+                    double   timeSeconds = Timer::GetSeconds();
+                    unsigned waitAllowed;
+
+                    for (UPInt j = 0; j < TicksNotifiers.GetSize(); j++)
+                    {
+                        waitAllowed = (unsigned)(TicksNotifiers[j]->OnTicks(timeSeconds) * Timer::MsPerSecond);
+                        if (waitAllowed < (unsigned)waitMs)
+                            waitMs = waitAllowed;
+                    }
+                }
+                
+                // Enter blocking run loop. We may continue until we timeout in which
+                // case it's time to service the ticks. Or if commands arrive in the command
+                // queue then the source callback will call 'CFRunLoopStop' causing this
+                // to return.
+                CFTimeInterval blockInterval = 0.001 * (double) waitMs;
+                exitReason = CFRunLoopRunInMode(kCFRunLoopDefaultMode, blockInterval, false);
+
+                if (exitReason == kCFRunLoopRunFinished)
+                {
+                    // Maybe this will occur during shutdown?
+                    break;
+                }
+                else if (exitReason == kCFRunLoopRunStopped )
+                {
+                    // Commands need processing or we're being shutdown.
+                    break;
+                }
+                else if (exitReason == kCFRunLoopRunTimedOut)
+                {
+                    // Timed out so that we can service our ticks callbacks.
+                    continue;
+                }
+                else if (exitReason == kCFRunLoopRunHandledSource)
+                {
+                    // Should never occur since the last param when we call
+                    // 'CFRunLoopRunInMode' is false.
+                    OVR_ASSERT(false);
+                    break;
+                }
+                else
+                {
+                    OVR_ASSERT_LOG(false, ("CFRunLoopRunInMode returned unexpected code"));
+                    break;
+                }
+            }
+            while(true);                    
+        }
+    }
+
+                                   
+    CFRunLoopRemoveSource(RunLoop, CommandQueueSource, kCFRunLoopDefaultMode);
+    CFRelease(CommandQueueSource);
+    
+    LogText("OVR::DeviceManagerThread - exiting (ThreadId=0x%p).\n", GetThreadId());
+
+    return 0;
+}
+    
+void DeviceManagerThread::staticCommandQueueSourceCallback(void* pContext)
+{
+    DeviceManagerThread* pThread = (DeviceManagerThread*) pContext;
+    pThread->commandQueueSourceCallback();
+}
+    
+void DeviceManagerThread::commandQueueSourceCallback()
+{    
+    CFRunLoopStop(RunLoop);
+}
+
+bool DeviceManagerThread::AddTicksNotifier(Notifier* notify)
+{
+     TicksNotifiers.PushBack(notify);
+     return true;
+}
+
+bool DeviceManagerThread::RemoveTicksNotifier(Notifier* notify)
+{
+    for (UPInt i = 0; i < TicksNotifiers.GetSize(); i++)
+    {
+        if (TicksNotifiers[i] == notify)
+        {
+            TicksNotifiers.RemoveAt(i);
+            return true;
+        }
+    }
+    return false;
+}
+
+void DeviceManagerThread::Shutdown()
+{
+    // Push for thread shutdown *WITH NO WAIT*.
+    // This will have the following effect:
+    //  - Exit command will get enqueued, which will be executed later on the thread itself.
+    //  - Beyond this point, this DeviceManager object may be deleted by our caller.
+    //  - Other commands, such as CreateDevice, may execute before ExitCommand, but they will
+    //    fail gracefully due to pLock->pManager == 0. Future commands can't be enqued
+    //    after pManager is null.
+    //  - Once ExitCommand executes, ThreadCommand::Run loop will exit and release the last
+    //    reference to the thread object.
+    PushExitCommand(false);
+
+    // make sure CFRunLoopRunInMode is woken up
+    CFRunLoopSourceSignal(CommandQueueSource);
+    CFRunLoopWakeUp(RunLoop);
+}
+    
+} // namespace OSX
+
+
+//-------------------------------------------------------------------------------------
+// ***** Creation
+
+// Creates a new DeviceManager and initializes OVR.
+DeviceManager* DeviceManager::Create()
+{
+
+    if (!System::IsInitialized())
+    {
+        // Use custom message, since Log is not yet installed.
+        OVR_DEBUG_STATEMENT(Log::GetDefaultLog()->
+            LogMessage(Log_Debug, "DeviceManager::Create failed - OVR::System not initialized"); );
+        return 0;
+    }
+
+    Ptr<OSX::DeviceManager> manager = *new OSX::DeviceManager;
+
+    if (manager)
+    {
+        if (manager->Initialize(0))
+        {
+            manager->AddFactory(&LatencyTestDeviceFactory::GetInstance());
+            manager->AddFactory(&SensorDeviceFactory::GetInstance());
+            manager->AddFactory(&OSX::HMDDeviceFactory::GetInstance());
+
+            manager->AddRef();
+        }
+        else
+        {
+            manager.Clear();
+        }
+    }    
+
+    return manager.GetPtr();
+}
+
+} // namespace OVR
diff --git a/LibOVR/Src/OVR_OSX_DeviceManager.h b/LibOVR/Src/OVR_OSX_DeviceManager.h
new file mode 100644
index 0000000..61af848
--- /dev/null
+++ b/LibOVR/Src/OVR_OSX_DeviceManager.h
@@ -0,0 +1,128 @@
+/************************************************************************************
+
+Filename    :   OVR_OSX_DeviceManager.h
+Content     :   OSX specific DeviceManager header.
+Created     :   March 14, 2013
+Authors     :   Lee Cooper
+
+Copyright   :   Copyright 2014 Oculus VR, Inc. All Rights reserved.
+
+Licensed under the Oculus VR Rift SDK License Version 3.1 (the "License"); 
+you may not use the Oculus VR Rift SDK except in compliance with the License, 
+which is provided at the time of installation or download, or which 
+otherwise accompanies this software in either electronic or hard copy form.
+
+You may obtain a copy of the License at
+
+http://www.oculusvr.com/licenses/LICENSE-3.1 
+
+Unless required by applicable law or agreed to in writing, the Oculus VR SDK 
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+*************************************************************************************/
+
+#ifndef OVR_OSX_DeviceManager_h
+#define OVR_OSX_DeviceManager_h
+
+#include "OVR_DeviceImpl.h"
+
+#include "Kernel/OVR_Timer.h"
+
+#include <ApplicationServices/ApplicationServices.h>
+#include <IOKit/hid/IOHIDManager.h>
+
+namespace OVR { namespace OSX {
+
+class DeviceManagerThread;
+
+//-------------------------------------------------------------------------------------
+// ***** OSX DeviceManager
+
+class DeviceManager : public DeviceManagerImpl
+{
+public:
+    DeviceManager();
+    ~DeviceManager();
+
+    // Initialize/Shutdown manager thread.
+    virtual bool Initialize(DeviceBase* parent);
+    virtual void Shutdown();
+
+    virtual ThreadCommandQueue* GetThreadQueue();
+    virtual ThreadId GetThreadId() const;
+    
+    virtual DeviceEnumerator<> EnumerateDevicesEx(const DeviceEnumerationArgs& args);
+
+    virtual bool  GetDeviceInfo(DeviceInfo* info) const;
+
+protected:
+    static void displayReconfigurationCallBack (CGDirectDisplayID display,
+                                                CGDisplayChangeSummaryFlags flags,
+                                                void *userInfo);
+  
+public: // data
+    Ptr<DeviceManagerThread> pThread;
+};
+
+//-------------------------------------------------------------------------------------
+// ***** Device Manager Background Thread
+
+class DeviceManagerThread : public Thread, public ThreadCommandQueue
+{
+    friend class DeviceManager;
+    enum { ThreadStackSize = 32 * 1024 };
+public:
+    DeviceManagerThread();
+    ~DeviceManagerThread();
+
+    virtual int Run();
+
+    // ThreadCommandQueue notifications for CommandEvent handling.
+    virtual void OnPushNonEmpty_Locked()
+    {
+        CFRunLoopSourceSignal(CommandQueueSource);
+        CFRunLoopWakeUp(RunLoop);
+    }
+    
+    virtual void OnPopEmpty_Locked()     {}
+
+
+    // Notifier used for different updates (EVENT or regular timing or messages).
+    class Notifier  
+    {
+    public:
+
+        // Called when timing ticks are updated. // Returns the largest number of microseconds
+        // this function can wait till next call.
+        virtual double  OnTicks(double tickSeconds)
+        { OVR_UNUSED1(tickSeconds);  return 1000.0; }
+    };
+ 
+    // Add notifier that will be called at regular intervals. 
+    bool AddTicksNotifier(Notifier* notify);
+    bool RemoveTicksNotifier(Notifier* notify);
+
+    CFRunLoopRef        GetRunLoop()
+    { return RunLoop; }
+    
+    void                Shutdown();
+private:
+    CFRunLoopRef        RunLoop;
+
+    CFRunLoopSourceRef  CommandQueueSource;
+    
+    static void staticCommandQueueSourceCallback(void* pContext);
+    void commandQueueSourceCallback();
+
+    Event               StartupEvent;
+    
+    // Ticks notifiers. Used for time-dependent events such as keep-alive.
+    Array<Notifier*>    TicksNotifiers;
+};
+
+}} // namespace OSX::OVR
+
+#endif // OVR_OSX_DeviceManager_h
diff --git a/LibOVR/Src/OVR_OSX_HIDDevice.cpp b/LibOVR/Src/OVR_OSX_HIDDevice.cpp
new file mode 100644
index 0000000..af840e0
--- /dev/null
+++ b/LibOVR/Src/OVR_OSX_HIDDevice.cpp
@@ -0,0 +1,924 @@
+/************************************************************************************
+Filename    :   OVR_OSX_HIDDevice.cpp
+Content     :   OSX HID device implementation.
+Created     :   February 26, 2013
+Authors     :   Lee Cooper
+ 
+Copyright   :   Copyright 2014 Oculus VR, Inc. All Rights reserved.
+
+Licensed under the Oculus VR Rift SDK License Version 3.1 (the "License"); 
+you may not use the Oculus VR Rift SDK except in compliance with the License, 
+which is provided at the time of installation or download, or which 
+otherwise accompanies this software in either electronic or hard copy form.
+
+You may obtain a copy of the License at
+
+http://www.oculusvr.com/licenses/LICENSE-3.1 
+
+Unless required by applicable law or agreed to in writing, the Oculus VR SDK 
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+*************************************************************************************/
+
+#include "OVR_OSX_HIDDevice.h"
+
+#include <IOKit/usb/IOUSBLib.h>
+
+namespace OVR { namespace OSX {
+
+    
+//-------------------------------------------------------------------------------------
+// **** OSX::DeviceManager
+
+HIDDeviceManager::HIDDeviceManager(DeviceManager* manager)
+ :  DevManager(manager)
+{
+    HIDManager = NULL;
+}
+
+HIDDeviceManager::~HIDDeviceManager()
+{
+}
+
+CFRunLoopRef HIDDeviceManager::getRunLoop()
+{
+    if (DevManager != NULL)
+    {
+        return DevManager->pThread->GetRunLoop();
+    }
+
+    return CFRunLoopGetCurrent();
+}
+
+bool HIDDeviceManager::initializeManager()
+{
+    if (HIDManager != NULL)
+    {
+        return true;
+    }
+    
+	HIDManager = IOHIDManagerCreate(kCFAllocatorDefault, kIOHIDOptionsTypeNone);
+    
+    if (!HIDManager)
+    {
+        return false;
+    }
+    
+    // Create a Matching Dictionary
+    CFMutableDictionaryRef matchDict =
+        CFDictionaryCreateMutable(kCFAllocatorDefault,
+                                  2,
+                                  &kCFTypeDictionaryKeyCallBacks,
+                                  &kCFTypeDictionaryValueCallBacks);
+    
+    // Specify a device manufacturer in the Matching Dictionary
+    UInt32 vendorId = Oculus_VendorId;
+    CFNumberRef vendorIdRef = CFNumberCreate(kCFAllocatorDefault, kCFNumberIntType, &vendorId);
+    CFDictionarySetValue(matchDict,
+                         CFSTR(kIOHIDVendorIDKey),
+                         vendorIdRef);
+    // Register the Matching Dictionary to the HID Manager
+    IOHIDManagerSetDeviceMatching(HIDManager, matchDict);
+    CFRelease(vendorIdRef);
+    CFRelease(matchDict);
+    
+    // Register a callback for USB device detection with the HID Manager
+    IOHIDManagerRegisterDeviceMatchingCallback(HIDManager, &staticDeviceMatchingCallback, this);
+    
+    IOHIDManagerScheduleWithRunLoop(HIDManager, getRunLoop(), kCFRunLoopDefaultMode);
+
+    return true;
+}
+    
+bool HIDDeviceManager::Initialize()
+{
+    return initializeManager();
+}
+
+void HIDDeviceManager::Shutdown()
+{
+    OVR_ASSERT_LOG(HIDManager, ("Should have called 'Initialize' before 'Shutdown'."));
+    CFRelease(HIDManager);
+    
+    LogText("OVR::OSX::HIDDeviceManager - shutting down.\n");
+}
+    
+bool HIDDeviceManager::getIntProperty(IOHIDDeviceRef device, CFStringRef propertyName, SInt32* pResult)
+{
+    
+    CFTypeRef ref = IOHIDDeviceGetProperty(device, propertyName);
+
+    if (!ref)
+    {
+        return false;
+    }
+    
+    if (CFGetTypeID(ref) != CFNumberGetTypeID())
+    {
+        return false;
+    }
+    
+    CFNumberGetValue((CFNumberRef) ref, kCFNumberSInt32Type, pResult);
+
+    return true;
+}
+    
+bool HIDDeviceManager::initVendorProductVersion(IOHIDDeviceRef device, HIDDeviceDesc* pDevDesc)
+{
+    
+    if (!getVendorId(device, &(pDevDesc->VendorId)))
+    {
+        return false;
+    }
+    
+    if (!getProductId(device, &(pDevDesc->ProductId)))
+    {
+        return false;
+    }
+
+    SInt32 result;
+    if (!getIntProperty(device, CFSTR(kIOHIDVersionNumberKey), &result))
+    {
+        return false;
+    }
+    pDevDesc->VersionNumber = result;
+    
+    return true;
+}
+
+bool HIDDeviceManager::initUsage(IOHIDDeviceRef device, HIDDeviceDesc* pDevDesc)
+{
+    
+    SInt32 result;
+    
+    if (!getIntProperty(device, CFSTR(kIOHIDPrimaryUsagePageKey), &result))
+    {
+        return false;
+    }
+    
+    pDevDesc->UsagePage = result;
+
+    
+    if (!getIntProperty(device, CFSTR(kIOHIDPrimaryUsageKey), &result))
+    {
+        return false;
+    }
+    
+    pDevDesc->Usage = result;
+    
+    return true;
+}
+
+bool HIDDeviceManager::initSerialNumber(IOHIDDeviceRef device, HIDDeviceDesc* pDevDesc)
+{
+    return getSerialNumberString(device, &(pDevDesc->SerialNumber));
+}
+    
+bool HIDDeviceManager::initStrings(IOHIDDeviceRef device, HIDDeviceDesc* pDevDesc)
+{
+
+    // Regardless of whether they fail we'll try and get the remaining.
+    getStringProperty(device, CFSTR(kIOHIDManufacturerKey), &(pDevDesc->Manufacturer));
+    getStringProperty(device, CFSTR(kIOHIDProductKey), &(pDevDesc->Product));
+    
+    return true;
+}
+
+bool HIDDeviceManager::getStringProperty(IOHIDDeviceRef device,
+                                         CFStringRef propertyName,
+                                         String* pResult)
+{
+    
+    CFStringRef str = (CFStringRef) IOHIDDeviceGetProperty(device, propertyName);
+    
+    if (!str)
+    {
+        return false;
+    }
+
+    CFIndex length = CFStringGetLength(str);
+    CFRange range = CFRangeMake(0, length);
+    
+    // Test the conversion first to get required buffer size.
+    CFIndex bufferLength;
+    CFIndex numberOfChars = CFStringGetBytes(str,
+                                             range,
+                                             kCFStringEncodingUTF8,
+                                             (char) '?',
+                                             FALSE,
+                                             NULL,
+                                             0,
+                                             &bufferLength);
+    
+    if (numberOfChars == 0)
+    {
+        return false;
+    }
+    
+    // Now allocate buffer.
+    char* buffer = new char[bufferLength+1];
+    
+    numberOfChars = CFStringGetBytes(str,
+                                     range,
+                                     kCFStringEncodingUTF8,
+                                     (char) '?',
+                                     FALSE,
+                                     (UInt8*) buffer,
+                                     bufferLength,
+                                     NULL);
+    OVR_ASSERT_LOG(numberOfChars != 0, ("CFStringGetBytes failed."));
+
+    buffer[bufferLength] = '\0';
+    *pResult = String(buffer);
+    
+    return true;
+}
+    
+bool HIDDeviceManager::getVendorId(IOHIDDeviceRef device, UInt16* pResult)
+{
+    SInt32 result;
+    
+    if (!getIntProperty(device, CFSTR(kIOHIDVendorIDKey), &result))
+    {
+        return false;
+    }
+    
+    *pResult = result;
+
+    return true;
+}
+    
+bool HIDDeviceManager::getProductId(IOHIDDeviceRef device, UInt16* pResult)
+{
+    SInt32 result;
+    
+    if (!getIntProperty(device, CFSTR(kIOHIDProductIDKey), &result))
+    {
+        return false;
+    }
+    
+    *pResult = result;
+    
+    return true;
+}
+ 
+bool HIDDeviceManager::getLocationId(IOHIDDeviceRef device, SInt32* pResult)
+{
+    SInt32 result;
+    
+    if (!getIntProperty(device, CFSTR(kIOHIDLocationIDKey), &result))
+    {
+        return false;
+    }
+        
+    *pResult = result;
+        
+    return true;
+}
+    
+bool HIDDeviceManager::getSerialNumberString(IOHIDDeviceRef device, String* pResult)
+{
+ 
+    if (!getStringProperty(device, CFSTR(kIOHIDSerialNumberKey), pResult))
+    {
+        return false;
+    }
+
+    return true;
+}
+    
+bool HIDDeviceManager::getPath(IOHIDDeviceRef device, String* pPath)
+{
+
+    String transport;
+    if (!getStringProperty(device, CFSTR(kIOHIDTransportKey), &transport))
+    {
+        return false;
+    }
+    
+    UInt16 vendorId;
+    if (!getVendorId(device, &vendorId))
+    {
+        return false;
+    }
+
+    UInt16 productId;
+    if (!getProductId(device, &productId))
+    {
+        return false;
+    }
+    
+    String serialNumber;
+	if (!getSerialNumberString(device, &serialNumber))
+    {
+        return false;
+    }
+    
+
+    StringBuffer buffer;
+    buffer.AppendFormat("%s:vid=%04hx:pid=%04hx:ser=%s",
+                            transport.ToCStr(),
+                            vendorId,
+                            productId,
+                            serialNumber.ToCStr());
+    
+    *pPath = String(buffer);
+    
+    return true;
+}
+
+bool HIDDeviceManager::Enumerate(HIDEnumerateVisitor* enumVisitor)
+{
+    if (!initializeManager())
+    {
+        return false;
+    }
+    
+
+	CFSetRef deviceSet = IOHIDManagerCopyDevices(HIDManager);
+    if (!deviceSet)
+        return false;
+    
+	CFIndex deviceCount = CFSetGetCount(deviceSet);
+    
+    // Allocate a block of memory and read the set into it.
+    IOHIDDeviceRef* devices = (IOHIDDeviceRef*) OVR_ALLOC(sizeof(IOHIDDeviceRef) * deviceCount);
+    CFSetGetValues(deviceSet, (const void **) devices);
+    
+
+    // Iterate over devices.
+    for (CFIndex deviceIndex = 0; deviceIndex < deviceCount; deviceIndex++)
+    {
+        IOHIDDeviceRef hidDev = devices[deviceIndex];
+        
+        if (!hidDev)
+        {
+            continue;
+        }
+        
+        HIDDeviceDesc devDesc;
+                
+        if (getPath(hidDev, &(devDesc.Path)) &&
+            initVendorProductVersion(hidDev, &devDesc) &&
+            enumVisitor->MatchVendorProduct(devDesc.VendorId, devDesc.ProductId) &&
+            initUsage(hidDev, &devDesc))
+        {
+            initStrings(hidDev, &devDesc);
+            initSerialNumber(hidDev, &devDesc);
+
+            // Look for the device to check if it is already opened.
+            Ptr<DeviceCreateDesc> existingDevice = DevManager->FindHIDDevice(devDesc, true);
+            // if device exists and it is opened then most likely the CreateHIDFile
+            // will fail; therefore, we just set Enumerated to 'true' and continue.
+            if (existingDevice && existingDevice->pDevice)
+            {
+                existingDevice->Enumerated = true;
+                continue;
+            }
+            
+            // Construct minimal device that the visitor callback can get feature reports from.
+            OSX::HIDDevice device(this, hidDev);
+            
+            enumVisitor->Visit(device, devDesc);
+        }
+    }
+    
+    OVR_FREE(devices);
+    CFRelease(deviceSet);
+    
+    return true;
+}
+
+OVR::HIDDevice* HIDDeviceManager::Open(const String& path)
+{
+
+    Ptr<OSX::HIDDevice> device = *new OSX::HIDDevice(this);
+
+    if (!device->HIDInitialize(path))
+    {
+        return NULL;
+    }
+
+    device->AddRef();
+    
+    return device;
+}
+    
+bool HIDDeviceManager::getFullDesc(IOHIDDeviceRef device, HIDDeviceDesc* desc)
+{
+        
+    if (!initVendorProductVersion(device, desc))
+    {
+        return false;
+    }
+        
+    if (!initUsage(device, desc))
+    {
+        return false;
+    }
+    
+    if (!initSerialNumber(device, desc))
+    {
+        return false;
+    }
+    
+    initStrings(device, desc);
+        
+    return true;
+}
+
+// New USB device specified in the matching dictionary has been added (callback function)
+void HIDDeviceManager::staticDeviceMatchingCallback(void *inContext,
+                                                    IOReturn inResult,
+                                                    void *inSender,
+                                                    IOHIDDeviceRef inIOHIDDeviceRef)
+{
+    OVR_UNUSED(inResult);
+    OVR_UNUSED(inSender);
+    HIDDeviceManager* hidMgr = static_cast<HIDDeviceManager*>(inContext);
+    HIDDeviceDesc hidDevDesc;
+    hidMgr->getPath(inIOHIDDeviceRef, &hidDevDesc.Path);
+    hidMgr->getFullDesc(inIOHIDDeviceRef, &hidDevDesc);
+    
+    hidMgr->DevManager->DetectHIDDevice(hidDevDesc);
+}
+
+//-------------------------------------------------------------------------------------
+// **** OSX::HIDDevice
+
+HIDDevice::HIDDevice(HIDDeviceManager* manager)
+ :  InMinimalMode(false), HIDManager(manager)
+{
+    Device = NULL;
+    RepluggedNotificationPort = 0;
+}
+    
+// This is a minimal constructor used during enumeration for us to pass
+// a HIDDevice to the visit function (so that it can query feature reports).
+HIDDevice::HIDDevice(HIDDeviceManager* manager, IOHIDDeviceRef device)
+:   InMinimalMode(true), HIDManager(manager), Device(device)
+{
+    RepluggedNotificationPort = 0;
+}
+
+HIDDevice::~HIDDevice()
+{
+    if (!InMinimalMode)
+    {
+        HIDShutdown();
+    }
+}
+
+bool HIDDevice::HIDInitialize(const String& path)
+{
+
+    DevDesc.Path = path;
+
+    if (!openDevice())
+    {
+        LogText("OVR::OSX::HIDDevice - Failed to open HIDDevice: %s", path.ToCStr());
+        return false;
+    }
+
+    // Setup notification for when a device is unplugged and plugged back in.
+    if (!setupDevicePluggedInNotification())
+    {
+        LogText("OVR::OSX::HIDDevice - Failed to setup notification for when device plugged back in.");
+        closeDevice(false);
+        return false;
+    }
+    
+    HIDManager->DevManager->pThread->AddTicksNotifier(this);
+
+    
+    LogText("OVR::OSX::HIDDevice - Opened '%s'\n"
+            "                    Manufacturer:'%s'  Product:'%s'  Serial#:'%s'\n",
+            DevDesc.Path.ToCStr(),
+            DevDesc.Manufacturer.ToCStr(), DevDesc.Product.ToCStr(),
+            DevDesc.SerialNumber.ToCStr());
+    
+    return true;
+}
+
+bool HIDDevice::initInfo()
+{
+    // Device must have been successfully opened.
+    OVR_ASSERT(Device);
+    
+    
+    // Get report lengths.
+    SInt32 bufferLength;
+    bool getResult = HIDManager->getIntProperty(Device, CFSTR(kIOHIDMaxInputReportSizeKey), &bufferLength);
+    OVR_ASSERT(getResult);
+    InputReportBufferLength = (UInt16) bufferLength;
+
+    getResult = HIDManager->getIntProperty(Device, CFSTR(kIOHIDMaxOutputReportSizeKey), &bufferLength);
+    OVR_ASSERT(getResult);
+    OutputReportBufferLength = (UInt16) bufferLength;
+
+    getResult = HIDManager->getIntProperty(Device, CFSTR(kIOHIDMaxFeatureReportSizeKey), &bufferLength);
+    OVR_ASSERT(getResult);
+    FeatureReportBufferLength = (UInt16) bufferLength;
+    
+    
+    if (ReadBufferSize < InputReportBufferLength)
+    {
+        OVR_ASSERT_LOG(false, ("Input report buffer length is bigger than read buffer."));
+        return false;
+    }
+    
+    // Get device desc.
+    if (!HIDManager->getFullDesc(Device, &DevDesc))
+    {
+        OVR_ASSERT_LOG(false, ("Failed to get device desc while initializing device."));
+        return false;
+    }
+    
+    return true;
+}
+
+void HIDDevice::staticDeviceAddedCallback(void* pContext, io_iterator_t iterator)
+{
+    HIDDevice* pDevice = (HIDDevice*) pContext;
+    pDevice->deviceAddedCallback(iterator);
+}
+
+void HIDDevice::deviceAddedCallback(io_iterator_t iterator)
+{
+
+    if (Device == NULL)
+    {
+        if (openDevice())
+        {
+            LogText("OVR::OSX::HIDDevice - Reopened device : %s", DevDesc.Path.ToCStr());
+
+            Ptr<DeviceCreateDesc> existingHIDDev = HIDManager->DevManager->FindHIDDevice(DevDesc, true);
+            if (existingHIDDev && existingHIDDev->pDevice)
+            {
+                HIDManager->DevManager->CallOnDeviceAdded(existingHIDDev);
+            }
+        }
+    }
+
+    // Reset callback.
+    while (IOIteratorNext(iterator))
+        ;
+}
+    
+bool HIDDevice::openDevice()
+{
+    
+    // Have to iterate through devices again to generate paths.
+	CFSetRef deviceSet = IOHIDManagerCopyDevices(HIDManager->HIDManager);
+	CFIndex deviceCount = CFSetGetCount(deviceSet);
+    
+    // Allocate a block of memory and read the set into it.
+    IOHIDDeviceRef* devices = (IOHIDDeviceRef*) OVR_ALLOC(sizeof(IOHIDDeviceRef) * deviceCount);
+    CFSetGetValues(deviceSet, (const void **) devices);
+    
+    
+    // Iterate over devices.
+    IOHIDDeviceRef device = NULL;
+
+    for (CFIndex deviceIndex = 0; deviceIndex < deviceCount; deviceIndex++)
+    {
+        IOHIDDeviceRef tmpDevice = devices[deviceIndex];
+        
+        if (!tmpDevice)
+        {
+            continue;
+        }
+        
+        String path;
+        if (!HIDManager->getPath(tmpDevice, &path))
+        {
+            continue;
+        }
+        
+        if (path == DevDesc.Path)
+        {
+            device = tmpDevice;
+            break;
+        }
+    }
+    
+    
+    OVR_FREE(devices);
+    
+    if (!device)
+    {
+        CFRelease(deviceSet);
+        return false;
+    }
+    
+    // Attempt to open device.
+    if (IOHIDDeviceOpen(device, kIOHIDOptionsTypeSeizeDevice)
+        != kIOReturnSuccess)
+    {
+        CFRelease(deviceSet);
+        return false;
+    }
+
+    // Retain the device before we release the set.
+    CFRetain(device);
+    CFRelease(deviceSet);
+    
+    
+    Device = device;
+
+    
+    if (!initInfo())
+    {
+        IOHIDDeviceClose(Device, kIOHIDOptionsTypeSeizeDevice);
+        CFRelease(Device);
+        Device = NULL;
+        return false;
+    }
+    
+    
+    // Setup the Run Loop and callbacks.
+    IOHIDDeviceScheduleWithRunLoop(Device,
+                                   HIDManager->getRunLoop(),
+                                   kCFRunLoopDefaultMode);
+    
+    IOHIDDeviceRegisterInputReportCallback(Device,
+                                           ReadBuffer,
+                                           ReadBufferSize,
+                                           staticHIDReportCallback,
+                                           this);
+
+    IOHIDDeviceRegisterRemovalCallback(Device,
+                                       staticDeviceRemovedCallback,
+                                       this);
+    
+    return true;
+}
+    
+void HIDDevice::HIDShutdown()
+{
+
+    HIDManager->DevManager->pThread->RemoveTicksNotifier(this);
+    
+    if (Device != NULL) // Device may already have been closed if unplugged.
+    {
+        closeDevice(false);
+    }
+
+    IOObjectRelease(RepluggedNotification);
+    if (RepluggedNotificationPort)
+        IONotificationPortDestroy(RepluggedNotificationPort);
+    
+    LogText("OVR::OSX::HIDDevice - HIDShutdown '%s'\n", DevDesc.Path.ToCStr());
+}
+
+bool HIDDevice::setupDevicePluggedInNotification()
+{
+    
+    // Setup notification when devices are plugged in.
+    RepluggedNotificationPort = IONotificationPortCreate(kIOMasterPortDefault);
+    
+    CFRunLoopSourceRef notificationRunLoopSource =
+        IONotificationPortGetRunLoopSource(RepluggedNotificationPort);
+    
+    CFRunLoopAddSource(HIDManager->getRunLoop(),
+                       notificationRunLoopSource,
+                       kCFRunLoopDefaultMode);
+    
+    CFMutableDictionaryRef matchingDict = IOServiceMatching(kIOUSBDeviceClassName);
+    
+    // Have to specify vendorId and productId. Doesn't seem to accept additional
+    // things like serial number.
+    SInt32 vendorId = DevDesc.VendorId;
+    CFNumberRef numberRef = CFNumberCreate(kCFAllocatorDefault,
+                                           kCFNumberSInt32Type,
+                                           &vendorId);
+    CFDictionarySetValue(matchingDict, CFSTR(kUSBVendorID), numberRef);
+    CFRelease(numberRef);
+    
+    SInt32 deviceProductId = DevDesc.ProductId;
+    numberRef = CFNumberCreate(kCFAllocatorDefault,
+                               kCFNumberSInt32Type,
+                               &deviceProductId);
+    CFDictionarySetValue(matchingDict, CFSTR(kUSBProductID), numberRef);
+    CFRelease(numberRef);
+    
+    kern_return_t result =
+            IOServiceAddMatchingNotification(RepluggedNotificationPort,
+                                             kIOMatchedNotification,
+                                             matchingDict,
+                                             staticDeviceAddedCallback,
+                                             this,
+                                             &RepluggedNotification);
+    
+    if (result != KERN_SUCCESS)
+    {
+        CFRelease(RepluggedNotificationPort);
+        RepluggedNotificationPort = 0;
+        return false;
+    }
+    
+    // Iterate through to arm.
+    while (IOIteratorNext(RepluggedNotification))
+    {
+	}
+    
+    return true;
+}
+
+void HIDDevice::closeDevice(bool wasUnplugged)
+{
+    OVR_ASSERT(Device != NULL);
+    
+    if (!wasUnplugged)
+    {
+        // Clear the registered callbacks.
+        IOHIDDeviceRegisterInputReportCallback(Device,
+                                               ReadBuffer,
+                                               InputReportBufferLength,
+                                               NULL,
+                                               this);
+        
+        IOHIDDeviceRegisterRemovalCallback(Device, NULL, this);
+        
+        IOHIDDeviceUnscheduleFromRunLoop(Device,
+                                         HIDManager->getRunLoop(),
+                                         kCFRunLoopDefaultMode);
+        IOHIDDeviceClose(Device, kIOHIDOptionsTypeNone);
+    }
+    
+	CFRelease(Device);
+    Device = NULL;
+        
+    LogText("OVR::OSX::HIDDevice - HID Device Closed '%s'\n", DevDesc.Path.ToCStr());
+}
+
+void HIDDevice::staticHIDReportCallback(void* pContext,
+                                        IOReturn result,
+                                        void* pSender,
+                                        IOHIDReportType reportType,
+                                        uint32_t reportId,
+                                        uint8_t* pReport,
+                                        CFIndex reportLength)
+{
+    OVR_UNUSED(result);
+    OVR_UNUSED(pSender);
+    OVR_UNUSED(reportType);
+    OVR_UNUSED(reportId);
+
+    HIDDevice* pDevice = (HIDDevice*) pContext;
+    return pDevice->hidReportCallback(pReport, (UInt32)reportLength);
+}
+
+void HIDDevice::hidReportCallback(UByte* pData, UInt32 length)
+{
+    
+    // We got data.
+    if (Handler)
+    {
+        Handler->OnInputReport(pData, length);
+    }
+}
+    
+void HIDDevice::staticDeviceRemovedCallback(void* pContext, IOReturn result, void* pSender)
+{
+    OVR_UNUSED(result);
+    OVR_UNUSED(pSender);
+    HIDDevice* pDevice = (HIDDevice*) pContext;
+    pDevice->deviceRemovedCallback();
+}
+    
+void HIDDevice::deviceRemovedCallback()
+{
+    Ptr<HIDDevice> _this(this); // prevent from release
+    
+    Ptr<DeviceCreateDesc> existingHIDDev = HIDManager->DevManager->FindHIDDevice(DevDesc, true);
+    if (existingHIDDev && existingHIDDev->pDevice)
+    {
+        HIDManager->DevManager->CallOnDeviceRemoved(existingHIDDev);
+    }
+    closeDevice(true);
+}
+
+CFStringRef HIDDevice::generateRunLoopModeString(IOHIDDeviceRef device)
+{
+    const UInt32 safeBuffSize = 256;
+    char nameBuff[safeBuffSize];
+    OVR_sprintf(nameBuff, safeBuffSize, "%016lX", device);
+  
+    return CFStringCreateWithCString(NULL, nameBuff, kCFStringEncodingASCII);
+}
+    
+bool HIDDevice::SetFeatureReport(UByte* data, UInt32 length)
+{
+    
+    if (!Device)
+        return false;
+    
+    UByte reportID = data[0];
+
+    if (reportID == 0)
+    {
+        // Not using reports so remove from data packet.
+        data++;
+        length--;
+    }
+    
+	IOReturn result = IOHIDDeviceSetReport( Device,
+                                            kIOHIDReportTypeFeature,
+                                            reportID,
+                                            data,
+                                            length);
+    
+    return (result == kIOReturnSuccess);
+}
+
+bool HIDDevice::GetFeatureReport(UByte* data, UInt32 length)
+{
+    if (!Device)
+        return false;
+    
+    CFIndex bufferLength = length;
+    
+    // Report id is in first byte of the buffer.
+	IOReturn result = IOHIDDeviceGetReport(Device, kIOHIDReportTypeFeature, data[0], data, &bufferLength);
+	
+    return (result == kIOReturnSuccess);
+}
+   
+double HIDDevice::OnTicks(double tickSeconds)
+{
+    
+    if (Handler)
+    {
+        return Handler->OnTicks(tickSeconds);
+    }
+    
+    return DeviceManagerThread::Notifier::OnTicks(tickSeconds);
+}
+
+HIDDeviceManager* HIDDeviceManager::CreateInternal(OSX::DeviceManager* devManager)
+{
+        
+    if (!System::IsInitialized())
+    {
+        // Use custom message, since Log is not yet installed.
+        OVR_DEBUG_STATEMENT(Log::GetDefaultLog()->
+                            LogMessage(Log_Debug, "HIDDeviceManager::Create failed - OVR::System not initialized"); );
+        return 0;
+    }
+
+    Ptr<OSX::HIDDeviceManager> manager = *new OSX::HIDDeviceManager(devManager);
+
+    if (manager)
+    {
+        if (manager->Initialize())
+        {
+            manager->AddRef();
+        }
+        else
+        {
+            manager.Clear();
+        }
+    }
+
+    return manager.GetPtr();
+}
+    
+} // namespace OSX
+
+//-------------------------------------------------------------------------------------
+// ***** Creation
+
+// Creates a new HIDDeviceManager and initializes OVR.
+HIDDeviceManager* HIDDeviceManager::Create(Ptr<OVR::DeviceManager>& deviceManager)
+{
+    
+    if (!System::IsInitialized())
+    {
+        // Use custom message, since Log is not yet installed.
+        OVR_DEBUG_STATEMENT(Log::GetDefaultLog()->
+            LogMessage(Log_Debug, "HIDDeviceManager::Create failed - OVR::System not initialized"); );
+        return 0;
+    }
+
+    Ptr<OSX::DeviceManager> deviceManagerOSX = *new OSX::DeviceManager;
+
+	if (!deviceManagerOSX)
+    {
+		return NULL;
+	}
+
+	if (!deviceManagerOSX->Initialize(NULL))
+    {         
+		return NULL;
+    }
+
+	deviceManager = deviceManagerOSX;
+
+	return deviceManagerOSX->GetHIDDeviceManager();
+}
+
+} // namespace OVR
diff --git a/LibOVR/Src/OVR_OSX_HIDDevice.h b/LibOVR/Src/OVR_OSX_HIDDevice.h
new file mode 100644
index 0000000..c6140cb
--- /dev/null
+++ b/LibOVR/Src/OVR_OSX_HIDDevice.h
@@ -0,0 +1,160 @@
+/************************************************************************************
+Filename    :   OVR_OSX_HIDDevice.h
+Content     :   OSX HID device implementation.
+Created     :   February 26, 2013
+Authors     :   Lee Cooper
+
+Copyright   :   Copyright 2014 Oculus VR, Inc. All Rights reserved.
+
+Licensed under the Oculus VR Rift SDK License Version 3.1 (the "License"); 
+you may not use the Oculus VR Rift SDK except in compliance with the License, 
+which is provided at the time of installation or download, or which 
+otherwise accompanies this software in either electronic or hard copy form.
+
+You may obtain a copy of the License at
+
+http://www.oculusvr.com/licenses/LICENSE-3.1 
+
+Unless required by applicable law or agreed to in writing, the Oculus VR SDK 
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+*************************************************************************************/
+
+#ifndef OVR_OSX_HIDDevice_h
+#define OVR_OSX_HIDDevice_h
+
+#include "OVR_HIDDevice.h"
+
+#include "OVR_OSX_DeviceManager.h"
+
+#include <IOKit/IOKitLib.h>
+
+namespace OVR { namespace OSX {
+
+class HIDDeviceManager;
+
+//-------------------------------------------------------------------------------------
+// ***** OSX HIDDevice
+
+class HIDDevice : public OVR::HIDDevice, public DeviceManagerThread::Notifier
+{
+private:
+    friend class HIDDeviceManager;
+
+public:
+    HIDDevice(HIDDeviceManager* manager);
+
+    // This is a minimal constructor used during enumeration for us to pass
+    // a HIDDevice to the visit function (so that it can query feature reports).
+    HIDDevice(HIDDeviceManager* manager, IOHIDDeviceRef device);
+    
+    virtual ~HIDDevice();
+
+    bool HIDInitialize(const String& path);
+    void HIDShutdown();
+    
+    virtual bool SetFeatureReport(UByte* data, UInt32 length);
+	virtual bool GetFeatureReport(UByte* data, UInt32 length);
+
+    bool Write(UByte* data, UInt32 length);
+
+    bool Read(UByte* pData, UInt32 length, UInt32 timeoutMilliS);
+    bool ReadBlocking(UByte* pData, UInt32 length);
+
+
+    // DeviceManagerThread::Notifier
+    double OnTicks(double tickSeconds);
+    
+private:
+    bool initInfo();
+    bool openDevice();
+    void closeDevice(bool wasUnplugged);
+    bool setupDevicePluggedInNotification();
+    CFStringRef generateRunLoopModeString(IOHIDDeviceRef device);
+    
+    static void staticHIDReportCallback(void* pContext,
+                                        IOReturn result,
+                                        void* pSender,
+                                        IOHIDReportType reportType,
+                                        uint32_t reportId,
+                                        uint8_t* pReport,
+                                        CFIndex reportLength);
+    void hidReportCallback(UByte* pData, UInt32 length);
+
+    static void staticDeviceRemovedCallback(void* pContext,
+                                            IOReturn result,
+                                            void* pSender);
+    void deviceRemovedCallback();
+    
+    static void staticDeviceAddedCallback(void* pContext,
+                                          io_iterator_t iterator);
+    void deviceAddedCallback(io_iterator_t iterator);
+    
+    bool                    InMinimalMode;
+    HIDDeviceManager*       HIDManager;
+    IOHIDDeviceRef          Device;
+    HIDDeviceDesc           DevDesc;
+    
+    enum { ReadBufferSize = 96 };
+    UByte                   ReadBuffer[ReadBufferSize];
+
+    UInt16                  InputReportBufferLength;
+    UInt16                  OutputReportBufferLength;
+    UInt16                  FeatureReportBufferLength;
+    
+    IONotificationPortRef   RepluggedNotificationPort;
+    io_iterator_t           RepluggedNotification;
+};
+
+
+//-------------------------------------------------------------------------------------
+// ***** OSX HIDDeviceManager
+
+class HIDDeviceManager : public OVR::HIDDeviceManager
+{
+	friend class HIDDevice;
+
+public:
+    HIDDeviceManager(OSX::DeviceManager* Manager);
+    virtual ~HIDDeviceManager();
+
+    virtual bool Initialize();
+    virtual void Shutdown();
+
+    virtual bool Enumerate(HIDEnumerateVisitor* enumVisitor);
+    virtual OVR::HIDDevice* Open(const String& path);
+
+    static HIDDeviceManager* CreateInternal(DeviceManager* manager);
+    
+private:
+    CFRunLoopRef getRunLoop();
+    bool initializeManager();
+    bool initVendorProductVersion(IOHIDDeviceRef device, HIDDeviceDesc* pDevDesc);
+    bool initUsage(IOHIDDeviceRef device, HIDDeviceDesc* pDevDesc);
+    bool initStrings(IOHIDDeviceRef device, HIDDeviceDesc* pDevDesc);
+    bool initSerialNumber(IOHIDDeviceRef device, HIDDeviceDesc* pDevDesc);
+    bool getVendorId(IOHIDDeviceRef device, UInt16* pResult);
+    bool getProductId(IOHIDDeviceRef device, UInt16* pResult);
+    bool getLocationId(IOHIDDeviceRef device, SInt32* pResult);
+    bool getSerialNumberString(IOHIDDeviceRef device, String* pResult);
+    bool getPath(IOHIDDeviceRef device, String* pPath);
+    bool getIntProperty(IOHIDDeviceRef device, CFStringRef key, int32_t* pResult);
+    bool getStringProperty(IOHIDDeviceRef device, CFStringRef propertyName, String* pResult);
+    bool getFullDesc(IOHIDDeviceRef device, HIDDeviceDesc* desc);
+    
+    static void staticDeviceMatchingCallback(void *inContext,
+                                             IOReturn inResult,
+                                             void *inSender,
+                                             IOHIDDeviceRef inIOHIDDeviceRef);
+    
+    DeviceManager* DevManager;
+
+    IOHIDManagerRef HIDManager;
+};
+
+}} // namespace OVR::OSX
+
+#endif // OVR_OSX_HIDDevice_h
diff --git a/LibOVR/Src/OVR_OSX_HMDDevice.cpp b/LibOVR/Src/OVR_OSX_HMDDevice.cpp
new file mode 100644
index 0000000..e16de81
--- /dev/null
+++ b/LibOVR/Src/OVR_OSX_HMDDevice.cpp
@@ -0,0 +1,264 @@
+/************************************************************************************
+
+Filename    :   OVR_OSX_HMDDevice.cpp
+Content     :   OSX Interface to HMD - detects HMD display
+Created     :   September 21, 2012
+Authors     :   Michael Antonov
+
+Copyright   :   Copyright 2014 Oculus VR, Inc. All Rights reserved.
+
+Licensed under the Oculus VR Rift SDK License Version 3.1 (the "License"); 
+you may not use the Oculus VR Rift SDK except in compliance with the License, 
+which is provided at the time of installation or download, or which 
+otherwise accompanies this software in either electronic or hard copy form.
+
+You may obtain a copy of the License at
+
+http://www.oculusvr.com/licenses/LICENSE-3.1 
+
+Unless required by applicable law or agreed to in writing, the Oculus VR SDK 
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+*************************************************************************************/
+
+#include "OVR_OSX_HMDDevice.h"
+
+#include "OVR_OSX_DeviceManager.h"
+#include "Util/Util_Render_Stereo.h"
+
+#include "OVR_OSX_HMDDevice.h"
+#include <ApplicationServices/ApplicationServices.h>
+#include <CoreFoundation/CoreFoundation.h>
+#include <CoreFoundation/CFString.h>
+#include <IOKit/graphics/IOGraphicsLib.h>
+
+namespace OVR { namespace OSX {
+
+using namespace OVR::Util::Render;
+    
+//-------------------------------------------------------------------------------------
+
+HMDDeviceCreateDesc::HMDDeviceCreateDesc(DeviceFactory* factory, 
+                                         UInt32 vend, UInt32 prod, const String& displayDeviceName, int dispId)
+        : DeviceCreateDesc(factory, Device_HMD),
+          DisplayDeviceName(displayDeviceName),
+          Contents(0),
+          DisplayId(dispId)
+{
+    OVR_UNUSED(vend);
+    OVR_UNUSED(prod);
+    DeviceId = DisplayDeviceName;
+
+    Desktop.X = 0;
+    Desktop.Y = 0;
+    ResolutionInPixels = Sizei(0);          
+    ScreenSizeInMeters = Sizef(0.0f);
+    VCenterFromTopInMeters = 0.0f;
+    LensSeparationInMeters = 0.0f;
+}
+
+HMDDeviceCreateDesc::HMDDeviceCreateDesc(const HMDDeviceCreateDesc& other)
+        : DeviceCreateDesc(other.pFactory, Device_HMD),
+          DeviceId(other.DeviceId), DisplayDeviceName(other.DisplayDeviceName),
+          Contents(other.Contents),
+          DisplayId(other.DisplayId)
+{
+    Desktop.X              = other.Desktop.X;
+    Desktop.Y              = other.Desktop.Y;
+    ResolutionInPixels     = other.ResolutionInPixels;
+    ScreenSizeInMeters     = other.ScreenSizeInMeters;          
+    VCenterFromTopInMeters = other.VCenterFromTopInMeters;
+    LensSeparationInMeters = other.LensSeparationInMeters;
+}
+
+HMDDeviceCreateDesc::MatchResult HMDDeviceCreateDesc::MatchDevice(const DeviceCreateDesc& other,
+                                                                  DeviceCreateDesc** pcandidate) const
+{
+    if ((other.Type != Device_HMD) || (other.pFactory != pFactory))
+        return Match_None;
+
+    // There are several reasons we can come in here:
+    //   a) Matching this HMD Monitor created desc to OTHER HMD Monitor desc
+    //          - Require exact device DeviceId/DeviceName match
+    //   b) Matching SensorDisplayInfo created desc to OTHER HMD Monitor desc
+    //          - This DeviceId is empty; becomes candidate
+    //   c) Matching this HMD Monitor created desc to SensorDisplayInfo desc
+    //          - This other.DeviceId is empty; becomes candidate
+
+    const HMDDeviceCreateDesc& s2 = (const HMDDeviceCreateDesc&) other;
+
+    if ((DeviceId == s2.DeviceId) &&
+        (DisplayId == s2.DisplayId))
+    {
+        // Non-null DeviceId may match while size is different if screen size was overwritten
+        // by SensorDisplayInfo in prior iteration.
+        if (!DeviceId.IsEmpty() ||
+            (ScreenSizeInMeters == s2.ScreenSizeInMeters) )
+        {            
+            *pcandidate = 0;
+            return Match_Found;
+        }
+    }
+
+
+    // DisplayInfo takes precedence, although we try to match it first.
+    if ((ResolutionInPixels == s2.ResolutionInPixels) &&        
+        (ScreenSizeInMeters == s2.ScreenSizeInMeters))
+    {
+        if (DeviceId.IsEmpty() && !s2.DeviceId.IsEmpty())
+        {
+            *pcandidate = const_cast<DeviceCreateDesc*>((const DeviceCreateDesc*)this);
+            return Match_Candidate;
+        }
+
+        *pcandidate = 0;
+        return Match_Found;
+    }    
+    
+    // SensorDisplayInfo may override resolution settings, so store as candidiate.
+    if (s2.DeviceId.IsEmpty() && s2.DisplayId == 0)
+    {        
+        *pcandidate = const_cast<DeviceCreateDesc*>((const DeviceCreateDesc*)this);        
+        return Match_Candidate;
+    }
+    // OTHER HMD Monitor desc may initialize DeviceName/Id
+    else if (DeviceId.IsEmpty() && DisplayId == 0)
+    {
+        *pcandidate = const_cast<DeviceCreateDesc*>((const DeviceCreateDesc*)this);        
+        return Match_Candidate;
+    }
+    
+    return Match_None;
+}
+
+
+bool HMDDeviceCreateDesc::UpdateMatchedCandidate(const DeviceCreateDesc& other, bool* newDeviceFlag)
+{
+    // This candidate was the the "best fit" to apply sensor DisplayInfo to.
+    OVR_ASSERT(other.Type == Device_HMD);
+    
+    const HMDDeviceCreateDesc& s2 = (const HMDDeviceCreateDesc&) other;
+
+    // Force screen size on resolution from SensorDisplayInfo.
+    // We do this because USB detection is more reliable as compared to HDMI EDID,
+    // which may be corrupted by splitter reporting wrong monitor 
+    if (s2.DeviceId.IsEmpty() && s2.DisplayId == 0)
+    {
+        ScreenSizeInMeters = s2.ScreenSizeInMeters;        
+        Contents |= Contents_Screen;
+
+        if (s2.Contents & HMDDeviceCreateDesc::Contents_Distortion)
+        {
+            memcpy(DistortionK, s2.DistortionK, sizeof(float)*4);
+            // TODO: DistortionEqn
+            Contents |= Contents_Distortion;
+        }
+        DeviceId          = s2.DeviceId;
+        DisplayId         = s2.DisplayId;
+        DisplayDeviceName = s2.DisplayDeviceName;
+        Desktop.X         = s2.Desktop.X;
+        Desktop.Y         = s2.Desktop.Y;
+        if (newDeviceFlag) *newDeviceFlag = true;
+    }
+    else if (DeviceId.IsEmpty())
+    {
+        // This branch is executed when 'fake' HMD descriptor is being replaced by
+        // the real one.
+        DeviceId          = s2.DeviceId;
+        DisplayId         = s2.DisplayId;
+        DisplayDeviceName = s2.DisplayDeviceName;
+        Desktop.X         = s2.Desktop.X;
+        Desktop.Y         = s2.Desktop.Y;
+
+		// ScreenSize and Resolution are NOT assigned here, since they may have
+		// come from a sensor DisplayInfo (which has precedence over HDMI).
+
+        if (newDeviceFlag) *newDeviceFlag = true;
+    }
+    else
+    {
+        if (newDeviceFlag) *newDeviceFlag = false;
+    }
+
+    return true;
+}
+
+    
+//-------------------------------------------------------------------------------------
+
+
+//-------------------------------------------------------------------------------------
+// ***** HMDDeviceFactory
+
+HMDDeviceFactory &HMDDeviceFactory::GetInstance()
+{
+	static HMDDeviceFactory instance;
+	return instance;
+}
+
+void HMDDeviceFactory::EnumerateDevices(EnumerateVisitor& visitor)
+{
+    CGDirectDisplayID Displays[32];
+    uint32_t NDisplays = 0;
+    CGGetOnlineDisplayList(32, Displays, &NDisplays);
+
+    for (unsigned int i = 0; i < NDisplays; i++)
+    {
+        io_service_t port = CGDisplayIOServicePort(Displays[i]);
+        CFDictionaryRef DispInfo = IODisplayCreateInfoDictionary(port, kIODisplayMatchingInfo);
+
+        uint32_t vendor = CGDisplayVendorNumber(Displays[i]);
+        uint32_t product = CGDisplayModelNumber(Displays[i]);
+
+        CGRect desktop = CGDisplayBounds(Displays[i]);
+        
+        if (vendor == 16082 && ( (product == 1)||(product == 2) ) ) // 7" or HD
+        {
+            char idstring[9];
+            idstring[0] = 'A'-1+((vendor>>10) & 31);
+            idstring[1] = 'A'-1+((vendor>>5) & 31);
+            idstring[2] = 'A'-1+((vendor>>0) & 31);
+            snprintf(idstring+3, 5, "%04d", product);
+
+            HMDDeviceCreateDesc hmdCreateDesc(this, vendor, product, idstring, Displays[i]);
+            
+			// Hard-coded defaults in case the device doesn't have the data itself.
+            if (product == 3)
+            {   // DK2 prototypes and variants (default to HmdType_DK2)
+                hmdCreateDesc.SetScreenParameters(desktop.origin.x, desktop.origin.y,
+                                                  1920, 1080, 0.12576f, 0.07074f, 0.12576f*0.5f, 0.0635f );
+            }
+			else if (product == 2)
+			{   // HD Prototypes (default to HmdType_DKHDProto) 
+				hmdCreateDesc.SetScreenParameters(desktop.origin.x, desktop.origin.y,
+                                                  1920, 1080, 0.12096f, 0.06804f, 0.06804f*0.5f, 0.0635f);
+			}
+			else if (product == 1)
+			{   // DK1
+                hmdCreateDesc.SetScreenParameters(desktop.origin.x, desktop.origin.y,
+                                                  1280, 800, 0.14976f, 0.0936f, 0.0936f*0.5f, 0.0635f);
+            }
+            else 
+            {   // Future Oculus HMD devices (default to DK1 dimensions)
+				hmdCreateDesc.SetScreenParameters(desktop.origin.x, desktop.origin.y,
+                                                      1280, 800, 0.14976f, 0.0936f, 0.0936f*0.5f, 0.0635f);
+			}
+            
+            OVR_DEBUG_LOG_TEXT(("DeviceManager - HMD Found %x:%x\n", vendor, product));
+            
+            // Notify caller about detected device. This will call EnumerateAddDevice
+            // if the this is the first time device was detected.
+            visitor.Visit(hmdCreateDesc);
+        }
+        CFRelease(DispInfo);
+    }
+}
+
+#include "OVR_Common_HMDDevice.cpp"
+
+}} // namespace OVR::OSX
+
+
diff --git a/LibOVR/Src/OVR_OSX_HMDDevice.h b/LibOVR/Src/OVR_OSX_HMDDevice.h
new file mode 100644
index 0000000..dd5c0fe
--- /dev/null
+++ b/LibOVR/Src/OVR_OSX_HMDDevice.h
@@ -0,0 +1,153 @@
+/************************************************************************************
+
+Filename    :   OVR_OSX_HMDDevice.h
+Content     :   OSX HMDDevice implementation
+Created     :   September 21, 2012
+Authors     :   Michael Antonov
+
+Copyright   :   Copyright 2014 Oculus VR, Inc. All Rights reserved.
+
+Licensed under the Oculus VR Rift SDK License Version 3.1 (the "License"); 
+you may not use the Oculus VR Rift SDK except in compliance with the License, 
+which is provided at the time of installation or download, or which 
+otherwise accompanies this software in either electronic or hard copy form.
+
+You may obtain a copy of the License at
+
+http://www.oculusvr.com/licenses/LICENSE-3.1 
+
+Unless required by applicable law or agreed to in writing, the Oculus VR SDK 
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+*************************************************************************************/
+
+#ifndef OVR_OSX_HMDDevice_h
+#define OVR_OSX_HMDDevice_h
+
+#include "OVR_DeviceImpl.h"
+#include "Kernel/OVR_String.h"
+#include "OVR_Profile.h"
+
+namespace OVR { namespace OSX {
+
+class HMDDevice;
+
+
+//-------------------------------------------------------------------------------------
+
+// HMDDeviceFactory enumerates attached Oculus HMD devices.
+//
+// This is currently done by matching monitor device strings.
+
+class HMDDeviceFactory : public DeviceFactory
+{
+public:
+    static HMDDeviceFactory &GetInstance();
+
+    // Enumerates devices, creating and destroying relevant objects in manager.
+    virtual void EnumerateDevices(EnumerateVisitor& visitor);
+
+protected:
+    DeviceManager* getManager() const { return (DeviceManager*) pManager; }
+};
+
+
+class HMDDeviceCreateDesc : public DeviceCreateDesc
+{
+    friend class HMDDevice;
+
+protected:
+    enum
+    {
+        Contents_Screen     = 1,
+        Contents_Distortion = 2,
+    };
+    String              DeviceId;
+    String              DisplayDeviceName;
+    struct
+    {
+        int             X, Y;
+    }                   Desktop;
+    unsigned int        Contents;
+
+    Sizei               ResolutionInPixels;
+    Sizef               ScreenSizeInMeters;
+    float               VCenterFromTopInMeters;
+    float               LensSeparationInMeters;
+
+    // TODO: update these to splines.
+    DistortionEqnType   DistortionEqn;
+    float               DistortionK[4];
+
+    int                DisplayId;
+
+public:
+    HMDDeviceCreateDesc(DeviceFactory* factory,
+                        UInt32 vendor, UInt32 product, const String& displayDeviceName, int dispId);
+    HMDDeviceCreateDesc(const HMDDeviceCreateDesc& other);
+
+    virtual DeviceCreateDesc* Clone() const
+    {
+        return new HMDDeviceCreateDesc(*this);
+    }
+
+    virtual DeviceBase* NewDeviceInstance();
+
+    virtual MatchResult MatchDevice(const DeviceCreateDesc& other,
+                                    DeviceCreateDesc**) const;
+
+    virtual bool        UpdateMatchedCandidate(const DeviceCreateDesc&, bool* newDeviceFlag = NULL);
+
+    virtual bool GetDeviceInfo(DeviceInfo* info) const;
+	
+    void  SetScreenParameters(int x, int y,
+                              int hres, int vres,
+                              float hsize, float vsize,
+                              float vCenterFromTopInMeters, float lensSeparationInMeters);
+    void SetDistortion(const float* dks);
+   
+    HmdTypeEnum GetHmdType() const;
+};
+
+
+//-------------------------------------------------------------------------------------
+
+// HMDDevice represents an Oculus HMD device unit. An instance of this class
+// is typically created from the DeviceManager.
+//  After HMD device is created, we its sensor data can be obtained by 
+//  first creating a Sensor object and then wrappig it in SensorFusion.
+
+class HMDDevice : public DeviceImpl<OVR::HMDDevice>
+{
+public:
+    HMDDevice(HMDDeviceCreateDesc* createDesc);
+    ~HMDDevice();
+
+    virtual bool Initialize(DeviceBase* parent);
+    virtual void Shutdown();
+
+    // Requests the currently used default profile. This profile affects the
+    // settings reported by HMDInfo. 
+    virtual Profile*    GetProfile();
+    virtual const char* GetProfileName();
+    virtual bool        SetProfileName(const char* name);
+
+    // Query associated sensor.
+    virtual OVR::SensorDevice* GetSensor();  
+
+protected:
+    HMDDeviceCreateDesc* getDesc() const { return (HMDDeviceCreateDesc*)pCreateDesc.GetPtr(); }
+
+    // User name for the profile used with this device.
+    String               ProfileName;
+    mutable Ptr<Profile> pCachedProfile;
+};
+
+
+}} // namespace OVR::OSX
+
+#endif // OVR_OSX_HMDDevice_h
+
diff --git a/LibOVR/Src/OVR_OSX_SensorDevice.cpp b/LibOVR/Src/OVR_OSX_SensorDevice.cpp
new file mode 100644
index 0000000..9b783c6
--- /dev/null
+++ b/LibOVR/Src/OVR_OSX_SensorDevice.cpp
@@ -0,0 +1,58 @@
+/************************************************************************************
+
+Filename    :   OVR_OSX_SensorDevice.cpp
+Content     :   OSX SensorDevice implementation
+Created     :   March 14, 2013
+Authors     :   Lee Cooper
+
+Copyright   :   Copyright 2014 Oculus VR, Inc. All Rights reserved.
+
+Licensed under the Oculus VR Rift SDK License Version 3.1 (the "License"); 
+you may not use the Oculus VR Rift SDK except in compliance with the License, 
+which is provided at the time of installation or download, or which 
+otherwise accompanies this software in either electronic or hard copy form.
+
+You may obtain a copy of the License at
+
+http://www.oculusvr.com/licenses/LICENSE-3.1 
+
+Unless required by applicable law or agreed to in writing, the Oculus VR SDK 
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+*************************************************************************************/
+
+#include "OVR_OSX_HMDDevice.h"
+#include "OVR_SensorImpl.h"
+#include "OVR_DeviceImpl.h"
+
+namespace OVR { namespace OSX {
+
+} // namespace OSX
+
+//-------------------------------------------------------------------------------------
+void SensorDeviceImpl::EnumerateHMDFromSensorDisplayInfo(const SensorDisplayInfoImpl& displayInfo, 
+                                                         DeviceFactory::EnumerateVisitor& visitor)
+{
+
+    OSX::HMDDeviceCreateDesc hmdCreateDesc(&OSX::HMDDeviceFactory::GetInstance(), 1, 1, "", 0);
+
+    hmdCreateDesc.SetScreenParameters(  0, 0,
+                                        displayInfo.HResolution, displayInfo.VResolution,
+                                        displayInfo.HScreenSize, displayInfo.VScreenSize,
+                                        displayInfo.VCenter, displayInfo.LensSeparation);
+
+    if ((displayInfo.DistortionType & SensorDisplayInfoImpl::Mask_BaseFmt) == SensorDisplayInfoImpl::Base_Distortion)
+    {
+        hmdCreateDesc.SetDistortion(displayInfo.DistortionK);
+        // TODO: add DistortionEqn
+    }
+    
+    visitor.Visit(hmdCreateDesc);
+}
+
+} // namespace OVR
+
+