67 lines
3.1 KiB
C#
67 lines
3.1 KiB
C#
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using System;
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using System.Reflection;
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using UnityEditor;
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using UnityEngine;
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using Object = UnityEngine.Object;
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namespace AssetRipperPatches.Editor
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{
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/// <summary>
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/// This script is AssetRipper's patch for exported audio effects to recover effect parameter names when Unity imports each audio mixer.
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/// Unity does not serialize the parameter names in a release asset, so it is impossible to recover them by AssetRipper.
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/// Fortunately, there is an internal function <c>AudioMixerEffectController.PreallocateGUIDs</c> in UnityEditor.dll, which can help us.
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/// This function is used by Unity Editor when creating a new audio effect. It collects a list of runtime audio effects,
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/// retrieves parameter definitions for each, and updates the parameter names and GUIDs in the caller AudioMixerEffectController.
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/// Moreover, this function won't update the GUID for a parameter if it already has a non-empty GUID,
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/// which is the case in exported audio effects, perfectly matching our needs.
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/// </summary>
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public class AudioMixerPostprocessor : AssetPostprocessor
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{
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private static readonly Type AudioMixerEffectControllerType;
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private static readonly MethodInfo PreallocateGUIDsMethod;
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private static readonly MethodInfo GetAudioEffectNamesMethod;
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static AudioMixerPostprocessor()
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{
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Assembly editorAssembly = typeof(AssetPostprocessor).Assembly;
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AudioMixerEffectControllerType = editorAssembly.GetType("UnityEditor.Audio.AudioMixerEffectController", true);
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PreallocateGUIDsMethod = AudioMixerEffectControllerType.GetMethod("PreallocateGUIDs", BindingFlags.Public | BindingFlags.Instance);
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if (PreallocateGUIDsMethod == null)
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{
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Debug.LogError("AudioMixerEffectController.PreallocateGUIDs() method is missing in this version of Unity. Audio effect parameter values will be reset to default.");
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}
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Type mixerEffectDefinitionsType = editorAssembly.GetType("UnityEditor.Audio.MixerEffectDefinitions", true);
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GetAudioEffectNamesMethod = mixerEffectDefinitionsType.GetMethod("GetAudioEffectNames", BindingFlags.Public | BindingFlags.Static);
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}
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static void OnPostprocessAllAssets(string[] importedAssets, string[] deletedAssets, string[] movedAssets, string[] movedFromAssetPaths)
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{
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if (PreallocateGUIDsMethod == null) return;
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bool printEffectNames = GetAudioEffectNamesMethod != null;
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foreach (string importedAsset in importedAssets)
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{
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if (importedAsset.EndsWith(".mixer"))
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{
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foreach (Object asset in AssetDatabase.LoadAllAssetsAtPath(importedAsset))
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{
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if (asset.GetType() == AudioMixerEffectControllerType)
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{
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if (printEffectNames)
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{
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printEffectNames = false;
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string[] effectNames = (string[])GetAudioEffectNamesMethod.Invoke(null, new object[0]);
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Debug.LogFormat("MixerEffectDefinitions.GetAudioEffectNames returns [{0}]", String.Join(", ", effectNames));
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}
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PreallocateGUIDsMethod.Invoke(asset, new object[0]);
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Debug.LogFormat("AudioMixerEffectController.PreallocateGUIDs has been called on {0}", asset);
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EditorUtility.SetDirty(asset);
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}
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}
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}
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}
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}
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}
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}
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