/************************************************************************************

Filename    :   OVR_DeviceConstants.h
Content     :   Device constants
Created     :   February 5, 2013
Authors     :   Lee Cooper

Copyright   :   Copyright 2014 Oculus VR, LLC All Rights reserved.

Licensed under the Oculus VR Rift SDK License Version 3.2 (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-3.2 

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_DeviceConstants_h
#define OVR_DeviceConstants_h

#include "../Kernel/OVR_Math.h"

// CAPI forward declarations.
struct ovrSensorData_;
typedef struct ovrSensorData_ ovrSensorData;

namespace OVR {


//-------------------------------------------------------------------------------------
// Different device types supported by OVR; this type is reported by DeviceBase::GetType.
// 
enum DeviceType
{
    Device_None,
    Device_Manager,
    Device_Sensor,
    Device_LatencyTester,
    Device_BootLoader,
    Device_All              = 0xFF // Set for enumeration only, to enumerate all device types.
};



//-------------------------------------------------------------------------------------
// Different lens distortion types supported by devices.
// 
enum DistortionEqnType
{
    Distortion_No_Override  = -1,    
	// These two are leagcy and deprecated.
    Distortion_Poly4        = 0,    // scale = (K0 + K1*r^2 + K2*r^4 + K3*r^6)
    Distortion_RecipPoly4   = 1,    // scale = 1/(K0 + K1*r^2 + K2*r^4 + K3*r^6)

    // CatmullRom10 is the preferred distortion format.
    Distortion_CatmullRom10 = 2,    // scale = Catmull-Rom spline through points (1.0, K[1]...K[9])

    Distortion_LAST                 // For ease of enumeration.
};


//-------------------------------------------------------------------------------------
// HMD types.
//
enum HmdTypeEnum
{
    HmdType_None,

    HmdType_DKProto,            // First duct-tape model, never sold.
    HmdType_DK1,                // DevKit1 - on sale to developers.
    HmdType_DKHDProto,          // DKHD - shown at various shows, never sold.
    HmdType_DKHD2Proto,         // DKHD2, 5.85-inch panel, never sold.
    HmdType_DKHDProto566Mi,     // DKHD, 5.66-inch panel, never sold.
    HmdType_CrystalCoveProto,   // Crystal Cove, 5.66-inch panel, shown at shows but never sold.
    HmdType_DK2,

    // Reminder - this header file is public - codenames only!

    HmdType_Unknown,            // Used for unnamed HW lab experiments.

    HmdType_LAST
};


//-------------------------------------------------------------------------------------
// HMD shutter types.
//
enum HmdShutterTypeEnum
{
    HmdShutter_Global,
    HmdShutter_RollingTopToBottom,
    HmdShutter_RollingLeftToRight,
    HmdShutter_RollingRightToLeft,
    // TODO:
    // color-sequential e.g. LCOS?
    // alternate eyes?
    // alternate columns?
    // outside-in?

    HmdShutter_LAST
};



//-------------------------------------------------------------------------------------
// For headsets that use eye cups
//
enum EyeCupType
{
    // Public lenses
    EyeCup_DK1A = 0,
    EyeCup_DK1B = 1,
    EyeCup_DK1C = 2,

    EyeCup_DK2A = 3,

    // Internal R&D codenames.
    // Reminder - this header file is public - codenames only!
    EyeCup_DKHD2A,
    EyeCup_OrangeA,
    EyeCup_RedA,
    EyeCup_PinkA,
    EyeCup_BlueA,
    EyeCup_Delilah1A,
    EyeCup_Delilah2A,
    EyeCup_JamesA,
    EyeCup_SunMandalaA,

    EyeCup_LAST
};


//-----------------------------------------------------------------------------
// BodyFrameState
//
#pragma pack(push, 8)

class SensorDataType
{
public:

    SensorDataType() : Temperature(0.0f), AbsoluteTimeSeconds(0.0) { }

    // C-interop support
    SensorDataType(const ovrSensorData& s);
    operator ovrSensorData () const;

    Vector3f Acceleration;     // in m/s^2
    Vector3f RotationRate;     // in rad/s
    Vector3f MagneticField;    // in Gauss

    float    Temperature;      // in degrees Celsius

    // The absolute time from the host computers perspective that the message should be
    // interpreted as. This is based on incoming timestamp and processed by a filter
    // that syncs the clocks while attempting to keep the distance between messages
    // device clock matching.
    //
    // Integration should use TimeDelta, but prediction into the future should derive
    // the delta time from PredictToSeconds - AbsoluteTimeSeconds.
    //
    // This value will generally be <= the return from a call to ovr_GetTimeInSeconds(),
    // but could be greater by under 1 ms due to system time update interrupt delays.
    //
    double   AbsoluteTimeSeconds;
};

static_assert((sizeof(SensorDataType) == 3*sizeof(Vector3f) + sizeof(float) + sizeof(double)), "sizeof(SensorDataType) failure");

#pragma pack(pop)


} // namespace OVR

#endif