added linux makefile

modules/oculus_sdk_linux/LibOVR/Src/CAPI/CAPI_HMDState.h

@@ -0,0 +1,347 @@
+/************************************************************************************
+
+Filename    :   CAPI_HMDState.h
+Content     :   State associated with a single HMD
+Created     :   January 24, 2014
+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_CAPI_HMDState_h
+#define OVR_CAPI_HMDState_h
+
+#include "../Kernel/OVR_Math.h"
+#include "../Kernel/OVR_List.h"
+#include "../Kernel/OVR_Log.h"
+#include "../OVR_CAPI.h"
+#include "../OVR_SensorFusion.h"
+#include "../Util/Util_LatencyTest.h"
+#include "../Util/Util_LatencyTest2.h"
+
+#include "CAPI_FrameTimeManager.h"
+#include "CAPI_HMDRenderState.h"
+#include "CAPI_DistortionRenderer.h"
+
+// Define OVR_CAPI_VISIONSUPPORT to compile in vision support 
+#ifdef OVR_CAPI_VISIONSUPPORT
+    #define OVR_CAPI_VISION_CODE(c) c
+    #include "../Vision/Vision_PoseTracker.h"
+#else
+    #define OVR_CAPI_VISION_CODE(c)
+#endif
+
+
+struct ovrHmdStruct { };
+
+namespace OVR { namespace CAPI {
+
+using namespace OVR::Util::Render;
+
+
+//-------------------------------------------------------------------------------------
+// ***** ThreadChecker
+
+// This helper class is used to verify that the API is used according to supported
+// thread safety constraints (is not re-entrant for this and related functions).
+class ThreadChecker
+{
+public:
+
+#ifndef OVR_BUILD_DEBUG
+
+    // In release build, thread checks are disabled.
+    ThreadChecker() { }
+    void Begin(const char* functionName)    { OVR_UNUSED1(functionName); }
+    void End()                              {  }
+
+    // Add thread-re-entrancy check for function scope
+    struct Scope
+    {
+        Scope(ThreadChecker*, const char *) { }
+        ~Scope() { }
+    };
+
+
+#else // OVR_BUILD_DEBUG
+    ThreadChecker() : pFunctionName(0), FirstThread(0)
+    { }
+
+    void Begin(const char* functionName)
+    {        
+        if (!pFunctionName)
+        {
+            pFunctionName = functionName;
+            FirstThread   = GetCurrentThreadId();
+        }
+        else
+        {
+            // pFunctionName may be not null here if function is called internally on the same thread.
+            OVR_ASSERT_LOG((FirstThread == GetCurrentThreadId()),
+                ("%s (threadId=%p) called at the same times as %s (threadId=%p)\n",
+                functionName, GetCurrentThreadId(), pFunctionName, FirstThread) );
+        }        
+    }
+    void End()
+    {
+        pFunctionName = 0;
+        FirstThread   = 0;
+    }
+
+    // Add thread-re-entrancy check for function scope.
+    struct Scope
+    {
+        Scope(ThreadChecker* threadChecker, const char *functionName) : pChecker(threadChecker)
+        { pChecker->Begin(functionName); }
+        ~Scope()
+        { pChecker->End(); }
+    private:
+        ThreadChecker* pChecker;
+    };
+
+private:
+    // If not 0, contains the name of the function that first entered the scope.
+    const char * pFunctionName;
+    ThreadId     FirstThread;
+
+#endif // OVR_BUILD_DEBUG
+};
+
+
+//-------------------------------------------------------------------------------------
+// ***** HMDState
+
+// Describes a single HMD.
+class HMDState : public ListNode<HMDState>,
+                 public ovrHmdStruct, public NewOverrideBase 
+{
+public:   
+
+    HMDState(HMDDevice* device);
+    HMDState(ovrHmdType hmdType);
+    virtual ~HMDState();
+
+
+    // *** Sensor Setup
+
+    bool            StartSensor(unsigned supportedCaps, unsigned requiredCaps);
+    void            StopSensor();
+    void            ResetSensor();
+    ovrSensorState  PredictedSensorState(double absTime);
+    bool            GetSensorDesc(ovrSensorDesc* descOut);
+
+    // Changes HMD Caps.
+    // Capability bits that are not directly or logically tied to one system (such as sensor)
+    // are grouped here. ovrHmdCap_VSync, for example, affects rendering and timing.
+    void            SetEnabledHmdCaps(unsigned caps);
+
+
+    bool            ProcessLatencyTest(unsigned char rgbColorOut[3]);
+    void            ProcessLatencyTest2(unsigned char rgbColorOut[3], double startTime);
+    
+
+    // *** Rendering Setup
+
+    bool       ConfigureRendering(ovrEyeRenderDesc eyeRenderDescOut[2],
+                                  const ovrFovPort eyeFovIn[2],
+                                  const ovrRenderAPIConfig* apiConfig,                                  
+                                  unsigned distortionCaps);  
+    
+    ovrPosef    BeginEyeRender(ovrEyeType eye);
+    void        EndEyeRender(ovrEyeType eye, ovrPosef renderPose, ovrTexture* eyeTexture);
+
+
+    const char* GetLastError()
+    {
+        const char* p = pLastError;
+        pLastError = 0;
+        return p;
+    }    
+
+    void NotifyAddDevice(DeviceType deviceType)
+    {
+        if (deviceType == Device_Sensor)
+            AddSensorCount++;
+        else if (deviceType == Device_LatencyTester)
+        {
+            AddLatencyTestCount++;
+            AddLatencyTestDisplayCount++;
+        }
+    }
+
+    bool checkCreateSensor();
+
+    void applyProfileToSensorFusion();
+
+    // INlines so that they can be easily compiled out.    
+    // Does debug ASSERT checks for functions that require BeginFrame.
+    // Also verifies that we are on the right thread.
+    void checkBeginFrameScope(const char* functionName)
+    {
+        OVR_UNUSED1(functionName); // for Release build.
+        OVR_ASSERT_LOG(BeginFrameCalled == true,
+                       ("%s called outside ovrHmd_BeginFrame.", functionName));
+        OVR_ASSERT_LOG(BeginFrameThreadId == OVR::GetCurrentThreadId(),
+                       ("%s called on a different thread then ovrHmd_BeginFrame.", functionName));
+    }
+
+    void checkRenderingConfigured(const char* functionName)
+    {
+        OVR_UNUSED1(functionName); // for Release build.
+        OVR_ASSERT_LOG(RenderingConfigured == true,
+                       ("%s called without ovrHmd_ConfigureRendering.", functionName));
+    }
+
+    void checkBeginFrameTimingScope(const char* functionName)
+    {
+        OVR_UNUSED1(functionName); // for Release build.
+        OVR_ASSERT_LOG(BeginFrameTimingCalled == true,
+                       ("%s called outside ovrHmd_BeginFrameTiming.", functionName));
+    }
+
+
+    HMDState* getThis() { return this; }
+
+    void updateLowPersistenceMode(bool lowPersistence) const;
+	void updateLatencyTestForHmd(bool latencyTesting);
+
+    void updateDK2FeaturesTiedToSensor(bool sensorCreatedJustNow);
+    
+	// Get properties by name.
+	float    getFloatValue(const char* propertyName, float defaultVal);
+    bool     setFloatValue(const char* propertyName, float value);
+	unsigned getFloatArray(const char* propertyName, float values[], unsigned arraySize);
+    bool     setFloatArray(const char* propertyName, float values[], unsigned arraySize);
+	const char* getString(const char* propertyName, const char* defaultVal);
+public:
+    
+    // Wrapper to support 'const'
+    struct HMDInfoWrapper
+    {
+        HMDInfoWrapper(ovrHmdType hmdType)
+        {
+            HmdTypeEnum t = HmdType_None;
+            if (hmdType == ovrHmd_DK1)
+                t = HmdType_DK1;
+            else if (hmdType == ovrHmd_CrystalCoveProto)
+                t = HmdType_CrystalCoveProto;
+            else if (hmdType == ovrHmd_DK2)
+                t = HmdType_DK2;
+            h = CreateDebugHMDInfo(t);
+        }
+        HMDInfoWrapper(HMDDevice* device) { if (device) device->GetDeviceInfo(&h); }
+        OVR::HMDInfo h;
+    };
+
+    // Note: pHMD can be null if we are representing a virtualized debug HMD.
+    Ptr<HMDDevice>          pHMD;
+
+    // HMDInfo shouldn't change, as its string pointers are passed out.
+    const HMDInfoWrapper    HMDInfoW;
+    const OVR::HMDInfo&     HMDInfo;
+
+    const char*             pLastError;
+
+    // Caps enabled for the HMD.
+    unsigned                EnabledHmdCaps;
+    // These are the flags actually applied to the Sensor device,
+    // used to track whether SetDisplayReport calls are necessary.
+    unsigned                HmdCapsAppliedToSensor;
+
+    
+    // *** Sensor
+
+    // Lock used to support thread-safe lifetime access to sensor.
+    Lock                    DevicesLock;
+
+    // Atomic integer used as a flag that we should check the sensor device.
+    AtomicInt<int>          AddSensorCount;    
+
+    // All of Sensor variables may be modified/used with DevicesLock, with exception that
+    // the {SensorStarted, SensorCreated} can be read outside the lock to see
+    // if device creation check is necessary.
+    // Whether we called StartSensor() and requested sensor caps.    
+    volatile bool           SensorStarted;
+    volatile bool           SensorCreated;
+    // pSensor may still be null or non-running after start if it wasn't yet available
+    Ptr<SensorDevice>       pSensor;	// Head
+    unsigned                SensorCaps;    
+
+    // SensorFusion state may be accessible without a lock.
+    SensorFusion            SFusion;
+
+    
+    // Vision pose tracker is currently new-allocated
+    OVR_CAPI_VISION_CODE(
+    Vision::PoseTracker*    pPoseTracker;
+    )
+    
+    // Latency tester
+    Ptr<LatencyTestDevice>  pLatencyTester;
+    Util::LatencyTest	    LatencyUtil;
+    AtomicInt<int>          AddLatencyTestCount;
+
+    bool                    LatencyTestActive;
+    unsigned char           LatencyTestDrawColor[3];
+
+    // Using latency tester as debug display
+    Ptr<LatencyTestDevice>  pLatencyTesterDisplay;
+    AtomicInt<int>          AddLatencyTestDisplayCount;
+    Util::LatencyTest2	    LatencyUtil2;
+
+    bool                    LatencyTest2Active;
+    unsigned char           LatencyTest2DrawColor[3];
+    //bool                    ReadbackColor;
+
+    // Rendering part
+    FrameTimeManager        TimeManager;
+    HMDRenderState          RenderState;
+    Ptr<DistortionRenderer> pRenderer;
+       
+    // Last timing value reported by BeginFrame.
+    double                  LastFrameTimeSeconds;    
+    // Last timing value reported by GetFrameTime. These are separate since the intended
+    // use is from different threads. TBD: Move to FrameTimeManager? Make atomic?
+    double                  LastGetFrameTimeSeconds;
+
+    // Last cached value returned by ovrHmd_GetString/ovrHmd_GetStringArray.
+    char                    LastGetStringValue[256];
+   
+
+    // Debug flag set after ovrHmd_ConfigureRendering succeeds.
+    bool                    RenderingConfigured;
+    // Set after BeginFrame succeeds, and its corresponding thread id for debug checks.
+    bool                    BeginFrameCalled;
+    ThreadId                BeginFrameThreadId;    
+    // Graphics functions are not re-entrant from other threads.
+    ThreadChecker           RenderAPIThreadChecker;
+    // 
+    bool                    BeginFrameTimingCalled;
+    
+    // Flags set when we've called BeginEyeRender on a given eye.
+    bool                    EyeRenderActive[2];
+};
+
+
+}} // namespace OVR::CAPI
+
+
+#endif // OVR_CAPI_HMDState_h
+
+