Set up first skeleton for optical flow data structures and dispatching

Runtime/OpticalFlow/OpticalFlow.cs

@@ -0,0 +1,55 @@
+using System;
+using System.Runtime.InteropServices;
+using UnityEngine;
+
+namespace FidelityFX.OpticalFlow
+{
+    public static class OpticalFlow
+    {
+        public static OpticalFlowContext CreateContext(in ContextDescription contextDescription)
+        {
+            throw new NotImplementedException();
+        }
+        
+        public struct ContextDescription
+        {
+            public Vector2Int resolution;
+        }
+
+        public struct DispatchDescription
+        {
+            public ResourceView color;
+            public ResourceView opticalFlowVector;
+            public ResourceView opticalFlowSCD;
+            public bool reset;
+            public int backbufferTransferFunction;
+            public Vector2 minMaxLuminance;
+        }
+        
+        [Serializable, StructLayout(LayoutKind.Sequential)]
+        internal struct OpticalFlowConstants
+        {
+            public Vector2Int inputLumaResolution;
+            public uint opticalFlowPyramidLevel;
+            public uint opticalFlowPyramidLevelCount;
+
+            public int frameIndex;
+            public uint backbufferTransferFunction;
+            public Vector2 minMaxLuminance;
+        }
+        
+        [Serializable, StructLayout(LayoutKind.Sequential)]
+        internal struct SpdConstants
+        {
+            public uint mips;
+            public uint numWorkGroups;
+            public uint workGroupOffsetX;
+            public uint workGroupOffsetY;
+
+            public uint numWorkGroupsOpticalFlowInputPyramid;
+            public uint pad0_;
+            public uint pad1_;
+            public uint pad2_;
+        }
+    }
+}

Runtime/OpticalFlow/OpticalFlow.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: cb98adb74c696524e900d3b0b965e1dc
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Runtime/OpticalFlow/OpticalFlowAssets.cs

@@ -75,12 +75,12 @@ namespace FidelityFX.OpticalFlow
         public ComputeShader prepareLuma;
 
         /// <summary>
-        /// The compute shader used by the generate SCD histogram pass.
+        /// The compute shader used by the generate scene change detection histogram pass.
         /// </summary>
         public ComputeShader generateScdHistogram;
 
         /// <summary>
-        /// The compute shader used by the compute SCD divergence pass.
+        /// The compute shader used by the compute scene change detection divergence pass.
         /// </summary>
         public ComputeShader computeScdDivergence;
 

Runtime/OpticalFlow/OpticalFlowContext.cs

@@ -0,0 +1,17 @@
+using System;
+using UnityEngine;
+using UnityEngine.Rendering;
+
+namespace FidelityFX.OpticalFlow
+{
+    public class OpticalFlowContext
+    {
+        private bool _firstExecution = true;
+        private uint _resourceFrameIndex;
+        
+        public void Dispatch(CommandBuffer commandBuffer, in OpticalFlow.DispatchDescription dispatchDescription)
+        {
+            throw new NotImplementedException();
+        }
+    }
+}

Runtime/OpticalFlow/OpticalFlowContext.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: baebcaebda3cbd344a546d7f3c47ae0d
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: