add preference to hide waveforms on timeline to resolve performance i…

…ssues.

Assets/uLipSync/Editor/Preference.cs

@@ -0,0 +1,59 @@
+using UnityEditor;
+
+namespace uLipSync
+{
+
+internal class EditorPrefsStr
+{
+    public const string DisplayWaveformOnTimeline = "uLipSync-Timeline-DisplayWaveform";
+}
+
+public static class Preference
+{
+    public static bool displayWaveformOnTimeline
+    {
+        get => EditorPrefs.GetBool(EditorPrefsStr.DisplayWaveformOnTimeline, true);
+        set => EditorPrefs.SetBool(EditorPrefsStr.DisplayWaveformOnTimeline, value);
+    }
+}
+
+public class PreferenceProvider : SettingsProvider
+{
+    const string PreferencePath = "Preferences/uLipSync";
+    const int LabelWidth = 200;
+
+    PreferenceProvider(string path, SettingsScope scopes) : base(path, scopes)
+    {
+    }
+
+    public override void OnGUI(string searchContext)
+    {
+        EditorGUILayout.Separator();
+
+        var defaultLabelWidth = EditorGUIUtility.labelWidth;
+        EditorGUIUtility.labelWidth = LabelWidth;
+
+        ++EditorGUI.indentLevel;
+
+        {
+            bool current = Preference.displayWaveformOnTimeline;
+            bool result = EditorGUILayout.Toggle("Display Waveform On Timeline", current);
+            if (current != result)
+            {
+                Preference.displayWaveformOnTimeline = result;
+            }
+        }
+
+        --EditorGUI.indentLevel;
+
+        EditorGUIUtility.labelWidth = defaultLabelWidth;
+    }
+
+    [SettingsProvider]
+    public static SettingsProvider CreateSettingProvider()
+    {
+        return new PreferenceProvider(PreferencePath, SettingsScope.User);
+    }
+}
+
+}

Assets/uLipSync/Editor/Timeline/uLipSyncClipEditor.cs

@@ -122,7 +122,7 @@ Texture2D GetOrCreateCachedTexture(uLipSyncClip clip, int width, int height)
     public override void DrawBackground(TimelineClip clip, ClipBackgroundRegion region)
     {
         DrawBackground(region);
-        DrawWave(clip, region);
+        if (Preference.displayWaveformOnTimeline) DrawWave(clip, region);
     }
 
     void DrawBackground(ClipBackgroundRegion region)