refactor!: place ResourceManager classes under SDK directory

Assets/MediaPipe/Examples/Scenes/DesktopDemo.unity

@@ -922,6 +922,36 @@ Transform:
   m_Father: {fileID: 0}
   m_RootOrder: 2
   m_LocalEulerAnglesHint: {x: 90, y: 180, z: 0}
+--- !u!1 &501670066
+GameObject:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  serializedVersion: 6
+  m_Component:
+  - component: {fileID: 501670067}
+  m_Layer: 0
+  m_Name: ResourceManager
+  m_TagString: Untagged
+  m_Icon: {fileID: 0}
+  m_NavMeshLayer: 0
+  m_StaticEditorFlags: 0
+  m_IsActive: 1
+--- !u!4 &501670067
+Transform:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 501670066}
+  m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
+  m_LocalPosition: {x: 0, y: 0, z: 0}
+  m_LocalScale: {x: 1, y: 1, z: 1}
+  m_Children: []
+  m_Father: {fileID: 0}
+  m_RootOrder: 6
+  m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
 --- !u!1 &624144232
 GameObject:
   m_ObjectHideFlags: 0

Assets/MediaPipe/Examples/Scripts/ResourceManager/AssetBundleLoader.cs

@@ -0,0 +1,17 @@
+using UnityEngine;
+
+public sealed class AssetBundleLoader : MonoBehaviour {
+  Mediapipe.AssetBundleManager resourceManager;
+
+  void Start() {
+    resourceManager = new Mediapipe.AssetBundleManager();
+  }
+
+  void PrepareAsset(string name, string uniqueKey) {
+    resourceManager.PrepareAsset(name, uniqueKey);
+  }
+
+  void PrepareAsset(string name) {
+    resourceManager.PrepareAsset(name, name);
+  }
+}

Assets/MediaPipe/Examples/Scripts/ResourceManager/LocalAssetLoader.cs

@@ -0,0 +1,17 @@
+using UnityEngine;
+
+public sealed class LocalAssetLoader : MonoBehaviour {
+  Mediapipe.LocalAssetManager resourceManager;
+
+  void Start() {
+    resourceManager = new Mediapipe.LocalAssetManager();
+  }
+
+  void PrepareAsset(string name, string uniqueKey) {
+    resourceManager.PrepareAsset(name, uniqueKey);
+  }
+
+  void PrepareAsset(string name) {
+    resourceManager.PrepareAsset(name, name);
+  }
+}

Assets/MediaPipe/Examples/Scripts/SceneDirector.cs

@@ -24,8 +24,6 @@ public class SceneDirector : MonoBehaviour {
   static IntPtr currentContext = IntPtr.Zero;
 
   const int MAX_WAIT_FRAME = 1000;
-  bool IsAssetLoaded = false;
-  bool IsAssetLoadFailed = false;
 
   void OnEnable() {
     // for debugging
@@ -39,7 +37,7 @@ public class SceneDirector : MonoBehaviour {
   }
 #endif
 
-  async void Start() {
+  void Start() {
 #if UNITY_EDITOR_OSX || UNITY_EDITOR_WIN
   #if UNITY_STANDALONE
     if (useGPU) {
@@ -59,21 +57,12 @@ public class SceneDirector : MonoBehaviour {
     }
 #endif
 
+    var resourceManager = GameObject.Find("ResourceManager");
 #if UNITY_EDITOR
-    var resourceManager = LocalAssetManager.Instance;
+    resourceManager.AddComponent<LocalAssetLoader>();
 #else
-    var resourceManager = AssetBundleManager.Instance;
+    resourceManager.AddComponent<AssetBundleLoader>();
 #endif
-
-    ResourceUtil.InitializeResourceManager(resourceManager);
-
-    try {
-      await resourceManager.LoadAllAssetsAsync();
-      IsAssetLoaded = true;
-    } catch (Exception e) {
-      Debug.LogError(e);
-      IsAssetLoadFailed = true;
-    }
   }
 
   void OnDisable() {
@@ -158,13 +147,6 @@ public class SceneDirector : MonoBehaviour {
   }
 
   IEnumerator RunGraph() {
-    yield return WaitForAssets();
-
-    if (IsAssetLoadFailed) {
-      Debug.LogError("Failed to load assets. Stopping...");
-      yield break;
-    }
-
     yield return WaitForGraph();
 
     if (graphPrefab == null) {
@@ -204,14 +186,6 @@ public class SceneDirector : MonoBehaviour {
     }
   }
 
-  IEnumerator WaitForAssets() {
-    if (!IsAssetLoaded && !IsAssetLoadFailed) {
-      Debug.Log("Waiting for assets to be loaded...");
-    }
-
-    yield return new WaitUntil(() => IsAssetLoaded || IsAssetLoadFailed);
-  }
-
   IEnumerator WaitForGraph() {
     var waitFrame = MAX_WAIT_FRAME;
 

Assets/MediaPipe/SDK/Scripts/Core/InternalException.cs

@@ -1,7 +1,7 @@
 using System;
 
 namespace Mediapipe {
-  public class InternalException : ApplicationException {
+  public class InternalException : Exception {
     public InternalException(string message) : base(message) {}
   }
 }

Assets/MediaPipe/SDK/Scripts/Core/MediaPipeException.cs

@@ -1,7 +1,7 @@
 using System;
 
 namespace Mediapipe {
-  public class MediaPipeException : ApplicationException {
+  public class MediaPipeException : Exception {
     public MediaPipeException(string message) : base(message) {}
   }
 }

Assets/MediaPipe/SDK/Scripts/Core/MediaPipePluginException.cs

@@ -1,7 +1,7 @@
 using System;
 
 namespace Mediapipe {
-  public class MediaPipePluginException : ApplicationException {
+  public class MediaPipePluginException : Exception {
     public MediaPipePluginException(string message) : base(message) {}
   }
 }