225 lines
12 KiB
Plaintext
225 lines
12 KiB
Plaintext
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/ Assets/SteamVR/Scripts/SteamVR_TrackedCamera.cs <00>/FW SteamVR_TrackedCamera <00> //======= Copyright (c) Valve Corporation, All rights reserved. ===============
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//
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// Purpose: Provides access to video feed and poses of tracked cameras.
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//
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// Usage:
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// var source = SteamVR_TrackedCamera.Distorted();
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// var source = SteamVR_TrackedCamera.Undistorted();
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// or
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// var undistorted = true; // or false
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// var source = SteamVR_TrackedCamera.Source(undistorted);
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//
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// - Distorted feeds are the decoded images from the camera.
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// - Undistorted feeds correct for the camera lens distortion (a.k.a. fisheye)
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// to make straight lines straight.
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//
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// VideoStreamTexture objects must be symmetrically Acquired and Released to
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// ensure the video stream is activated, and shutdown properly once there are
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// no more consumers. You only need to Acquire once when starting to use a
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// stream, and Release when you are done using it (as opposed to every frame).
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//
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//=============================================================================
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using UnityEngine;
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using Valve.VR;
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public class SteamVR_TrackedCamera
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{
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public class VideoStreamTexture
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{
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public VideoStreamTexture(uint deviceIndex, bool undistorted)
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{
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this.undistorted = undistorted;
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videostream = Stream(deviceIndex);
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}
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public bool undistorted { get; private set; }
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public uint deviceIndex { get { return videostream.deviceIndex; } }
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public bool hasCamera { get { return videostream.hasCamera; } }
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public bool hasTracking { get { Update(); return header.standingTrackedDevicePose.bPoseIsValid; } }
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public uint frameId { get { Update(); return header.nFrameSequence; } }
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public VRTextureBounds_t frameBounds { get; private set; }
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public EVRTrackedCameraFrameType frameType { get { return undistorted ? EVRTrackedCameraFrameType.Undistorted : EVRTrackedCameraFrameType.Distorted; } }
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Texture2D _texture;
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public Texture2D texture { get { Update(); return _texture; } }
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public SteamVR_Utils.RigidTransform transform { get { Update(); return new SteamVR_Utils.RigidTransform(header.standingTrackedDevicePose.mDeviceToAbsoluteTracking); } }
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public Vector3 velocity { get { Update(); var pose = header.standingTrackedDevicePose; return new Vector3(pose.vVelocity.v0, pose.vVelocity.v1, -pose.vVelocity.v2); } }
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public Vector3 angularVelocity { get { Update(); var pose = header.standingTrackedDevicePose; return new Vector3(-pose.vAngularVelocity.v0, -pose.vAngularVelocity.v1, pose.vAngularVelocity.v2); } }
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public TrackedDevicePose_t GetPose() { Update(); return header.standingTrackedDevicePose; }
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public ulong Acquire()
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{
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return videostream.Acquire();
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}
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public ulong Release()
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{
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var result = videostream.Release();
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if (videostream.handle == 0)
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{
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Object.Destroy(_texture);
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_texture = null;
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}
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return result;
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}
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int prevFrameCount = -1;
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void Update()
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{
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if (Time.frameCount == prevFrameCount)
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return;
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prevFrameCount = Time.frameCount;
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if (videostream.handle == 0)
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return;
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var vr = SteamVR.instance;
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if (vr == null)
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return;
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var trackedCamera = OpenVR.TrackedCamera;
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if (trackedCamera == null)
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return;
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var nativeTex = System.IntPtr.Zero;
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var deviceTexture = (_texture != null) ? _texture : new Texture2D(2, 2);
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var headerSize = (uint)System.Runtime.InteropServices.Marshal.SizeOf(header.GetType());
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if (vr.textureType == ETextureType.OpenGL)
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{
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if (glTextureId != 0)
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trackedCamera.ReleaseVideoStreamTextureGL(videostream.handle, glTextureId);
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if (trackedCamera.GetVideoStreamTextureGL(videostream.handle, frameType, ref glTextureId, ref header, headerSize) != EVRTrackedCameraError.None)
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return;
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nativeTex = (System.IntPtr)glTextureId;
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}
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else if (vr.textureType == ETextureType.DirectX)
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{
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if (trackedCamera.GetVideoStreamTextureD3D11(videostream.handle, frameType, deviceTexture.GetNativeTexturePtr(), ref nativeTex, ref header, headerSize) != EVRTrackedCameraError.None)
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return;
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}
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if (_texture == null)
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{
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_texture = Texture2D.CreateExternalTexture((int)header.nWidth, (int)header.nHeight, TextureFormat.RGBA32, false, false, nativeTex);
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uint width = 0, height = 0;
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var frameBounds = new VRTextureBounds_t();
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if (trackedCamera.GetVideoStreamTextureSize(deviceIndex, frameType, ref frameBounds, ref width, ref height) == EVRTrackedCameraError.None)
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{
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// Account for textures being upside-down in Unity.
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frameBounds.vMin = 1.0f - frameBounds.vMin;
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frameBounds.vMax = 1.0f - frameBounds.vMax;
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this.frameBounds = frameBounds;
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}
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}
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else
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{
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_texture.UpdateExternalTexture(nativeTex);
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}
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}
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uint glTextureId;
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VideoStream videostream;
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CameraVideoStreamFrameHeader_t header;
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}
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#region Top level accessors.
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public static VideoStreamTexture Distorted(int deviceIndex = (int)OpenVR.k_unTrackedDeviceIndex_Hmd)
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{
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if (distorted == null)
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distorted = new VideoStreamTexture[OpenVR.k_unMaxTrackedDeviceCount];
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if (distorted[deviceIndex] == null)
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distorted[deviceIndex] = new VideoStreamTexture((uint)deviceIndex, false);
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return distorted[deviceIndex];
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}
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public static VideoStreamTexture Undistorted(int deviceIndex = (int)OpenVR.k_unTrackedDeviceIndex_Hmd)
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{
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if (undistorted == null)
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undistorted = new VideoStreamTexture[OpenVR.k_unMaxTrackedDeviceCount];
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if (undistorted[deviceIndex] == null)
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undistorted[deviceIndex] = new VideoStreamTexture((uint)deviceIndex, true);
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return undistorted[deviceIndex];
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}
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public static VideoStreamTexture Source(bool undistorted, int deviceIndex = (int)OpenVR.k_unTrackedDeviceIndex_Hmd)
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{
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return undistorted ? Undistorted(deviceIndex) : Distorted(deviceIndex);
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}
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private static VideoStreamTexture[] distorted, undistorted;
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#endregion
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#region Internal class to manage lifetime of video streams (per device).
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class VideoStream
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{
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public VideoStream(uint deviceIndex)
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{
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this.deviceIndex = deviceIndex;
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var trackedCamera = OpenVR.TrackedCamera;
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if (trackedCamera != null)
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trackedCamera.HasCamera(deviceIndex, ref _hasCamera);
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}
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public uint deviceIndex { get; private set; }
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ulong _handle;
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public ulong handle { get { return _handle; } }
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bool _hasCamera;
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public bool hasCamera { get { return _hasCamera; } }
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ulong refCount;
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public ulong Acquire()
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{
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if (_handle == 0 && hasCamera)
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{
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var trackedCamera = OpenVR.TrackedCamera;
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if (trackedCamera != null)
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trackedCamera.AcquireVideoStreamingService(deviceIndex, ref _handle);
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}
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return ++refCount;
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}
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public ulong Release()
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{
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if (refCount > 0 && --refCount == 0 && _handle != 0)
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{
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var trackedCamera = OpenVR.TrackedCamera;
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if (trackedCamera != null)
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trackedCamera.ReleaseVideoStreamingService(_handle);
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_handle = 0;
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}
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return refCount;
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}
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}
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static VideoStream Stream(uint deviceIndex)
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{
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if (videostreams == null)
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videostreams = new VideoStream[OpenVR.k_unMaxTrackedDeviceCount];
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if (videostreams[deviceIndex] == null)
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videostreams[deviceIndex] = new VideoStream(deviceIndex);
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return videostreams[deviceIndex];
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}
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static VideoStream[] videostreams;
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#endregion
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}
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SteamVR_TrackedCamera Assembly-CSharp.dll
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