572 lines
20 KiB
C#
572 lines
20 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using UnityEngine;
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using UnityEngine.Events;
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namespace AssetManagement
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{
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/// <summary>
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/// 统一处理加载和下载两个流程的基础单位
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/// 外界访问资源包单位的唯一接口
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/// </summary>
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public class BundleRecord
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{
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// 注：已知问题 fileSize 可能不会在重新初始化后改变
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// 但是显然，保存AssetPathData是更糟糕的选择
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// 外部处理不当，会导致更新前挂起的资源会有进度条不正确的问题，但是不造成大的影响
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public readonly int fileSize;
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// 基本加载流程：
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// 从UpdateHelper测试是否存在Persist，如果存在，试图从Persist加载
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// 否则试图从Streaming加载
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// 加载失败后，试图用资源服务器下载
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public readonly BundleManager manager;
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public readonly string name;
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public BundleRecord(AssetDependencyItem pathData, BundleManager manager)
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{
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name = pathData.name;
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fileSize = pathData.fileSize;
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this.manager = manager;
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}
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/// <summary>
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/// 是否主动加载的资源包，主动加载需要主动释放
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/// </summary>
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public bool active { get; private set; }
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/// <summary>
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/// 被其他资源包依赖次数
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/// </summary>
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public int depended { get; private set; }
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/// <summary>
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/// 依赖的其他资源包
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/// </summary>
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// 注：只有主动加载会记录依赖，依赖加载的资源不记录
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public List<BundleRecord> dependencies { get; private set; }
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public AssetBundle assetBundle { get; private set; }
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public BundleLoader loader { get; private set; }
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public BundleDownloader downloader { get; private set; }
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/// <summary>
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/// 当前加载状态
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/// </summary>
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public BundleState state { get; private set; }
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// 当前是否处于使用状态
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public bool isInUse { get; private set; }
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// 是否已经下载过一次
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// 加载失败时，如果没有下载记录，允许强行执行一次下载流程
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public bool hasDownloaded { get; private set; }
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public event UnityAction<BundleRecord> onStateUpdate;
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/// <summary>
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/// 同步主动加载
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/// </summary>
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// 注：这个几把玩意现在有已知bug - 如果被依赖包出现Error状态，将不会透传到上层
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public void ActiveLoadSync()
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{
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#if UNITY_EDITOR
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BundleDebugManager.AppendBundle(name);
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#endif
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var temp = state;
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if (state == BundleState.Loading)
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{
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// 现在肯定是active状态，不需要搞过多判定
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active = true;
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// 使用特殊方法转异步到同步
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if (dependencies != null)
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{
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// 注：需要先刷新全部依赖树的状态，然后刷新依赖状态
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// 注：这堆破烂很蛋疼，需要先更新全部，然后再发状态改变
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var beforeState = dependencies.Select(a => a.state).ToArray();
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foreach (var dependency in dependencies)
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dependency.LoadDependencySync();
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for (var i = 0; i < dependencies.Count; i++)
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dependencies[i].SendStateUpdate(beforeState[i]);
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// foreach (var dependency in dependencies)
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// if (dependency.active)
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// dependency.RefreshWaitDependencies();
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}
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}
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else
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{
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// 注：执行之前需要BundleManager进行全面检查
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// 异步加载中的被调用情况，应该绝对过滤掉
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// 这里不做过多异常处理
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if (!active)
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{
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active = true;
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if (dependencies == null)
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dependencies = manager.GetDependencies(name);
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// 注：需要全部依赖包加载完成，然后才能刷新本身active的依赖包
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// 结构很诡异，AddDependencySync，因此做成private
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// foreach (var dependency in dependencies)
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// dependency.LoadSync();
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var beforeState = dependencies.Select(a => a.state).ToArray();
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foreach (var dependency in dependencies)
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dependency.AddDependencySync();
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for (var i = 0; i < dependencies.Count; i++)
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dependencies[i].SendStateUpdate(beforeState[i]);
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// foreach (var dependency in dependencies)
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// if (dependency.active)
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// dependency.RefreshWaitDependencies();
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}
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}
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UpdateInUse();
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LoadSync();
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state = assetBundle ? BundleState.WaitDependency : BundleState.Error;
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RefreshWaitDependencies();
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SendStateUpdate(temp);
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}
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/// <summary>
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/// 同步依赖加载
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/// </summary>
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private void AddDependencySync()
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{
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depended = Mathf.Max(0, depended) + 1;
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UpdateInUse();
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LoadDependencySync();
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}
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private void LoadDependencySync()
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{
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// 注：执行之前需要BundleManager进行全面检查
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// 异步加载中的被调用情况，应该绝对过滤掉
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// 这里不做过多异常处理
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LoadSync();
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// 同步加载不处理active被依赖的流程 - 全部给上层处理
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state = assetBundle ? BundleState.Done : BundleState.Error;
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}
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private void LoadSync()
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{
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if (!assetBundle)
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{
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// 编辑器额外检查下路径提前报错
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// 不节约这点性能了，运行时报错看着好看点
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// #if UNITY_EDITOR
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var pathState = manager.assetPathHub.GetPathState(name);
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switch (pathState)
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{
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case AssetPathState.online:
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Debug.LogError(string.Format("Unable to sync load online asset {0}!", name));
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break;
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case AssetPathState.unmarked:
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Debug.LogError(string.Format("Unable to sync load unmarked asset {0}!", name));
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break;
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default:
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{
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// #endif
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if (loader != null)
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{
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manager.loadHub.onComplete -= OnLoadComplete;
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manager.loadHub.StopUnit(loader);
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}
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var path = manager.assetPathHub.GetPath(name);
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assetBundle = AssetBundle.LoadFromFile(path + AssetConst.bundleVariant);
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// #if UNITY_EDITOR
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break;
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}
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}
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// #endif
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}
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}
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/// <summary>
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/// 异步依赖加载
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/// </summary>
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public void ActiveLoad()
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{
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#if UNITY_EDITOR
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BundleDebugManager.AppendBundle(name);
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#endif
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if (!active)
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{
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active = true;
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if (dependencies == null)
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{
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dependencies = manager.GetDependencies(name);
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foreach (var dependency in dependencies)
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dependency.onStateUpdate += OnDependencyUpdate;
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}
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foreach (var t in dependencies)
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t.AddDependency();
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// 特殊处理由依赖包升级到主动包的流程
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if (state == BundleState.Done)
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{
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state = BundleState.WaitDependency;
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RefreshWaitDependencies();
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}
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RefreshInUse();
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}
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}
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public void ActiveUnload()
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{
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if (active)
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{
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active = false;
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if (dependencies != null)
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foreach (var t in dependencies)
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t.RemoveDependency();
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RefreshInUse();
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}
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}
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/// <summary>
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/// 异步依赖加载
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/// </summary>
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public void AddDependency()
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{
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depended = Mathf.Max(0, depended) + 1;
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RefreshInUse();
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}
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public void RemoveDependency()
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{
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depended = Mathf.Max(0, depended - 1);
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RefreshInUse();
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}
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public void Dispose()
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{
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manager.downloadHub.onComplete -= OnDownloadComplete;
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manager.loadHub.onComplete -= OnLoadComplete;
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RemoveDependencyListen();
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}
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public float GetTotalFinishBytes()
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{
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var bytes = GetSelfFinishBytes();
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if (dependencies != null)
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{
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foreach (var dependency in dependencies)
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{
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bytes += dependency.GetSelfFinishBytes();
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}
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}
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return bytes;
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}
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public float GetSelfFinishBytes()
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{
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return GetSelfProgress() * fileSize;
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}
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public float GetTotalProgress()
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{
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var finishBytes = GetTotalFinishBytes();
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float totalBytes = fileSize;
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if (dependencies != null)
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foreach (var dependency in dependencies)
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totalBytes += dependency.fileSize;
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return finishBytes / totalBytes;
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}
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public float GetSelfProgress()
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{
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float progress;
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switch (state)
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{
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case BundleState.Done:
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case BundleState.WaitDependency:
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case BundleState.Error:
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{
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progress = 1f;
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}
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break;
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case BundleState.WaitUnload:
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case BundleState.Unload:
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{
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progress = 0f;
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}
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break;
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case BundleState.Downloading:
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progress = downloader != null ? downloader.GetProgress() : 0f;
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break;
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case BundleState.Loading:
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progress = loader != null ? loader.GetProgress() : 0f;
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break;
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default:
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progress = 0f;
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throw new ArgumentOutOfRangeException();
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}
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return progress;
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}
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private void RefreshInUse()
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{
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if (UpdateInUse())
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{
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if (name == "ui/sprite/login")
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Debug.LogWarning("Update In Use: " + isInUse + " Active: " + active);
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if (isInUse)
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TryLoadAssetBundle();
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else
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TryUnloadAssetBundle();
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}
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}
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private bool UpdateInUse()
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{
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var willInUse = active || depended > 0;
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var temp = willInUse != isInUse;
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isInUse = willInUse;
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return temp;
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}
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/// <summary>
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/// 如果有主动和被动加载引用，并且AssetBundle尚未加载，就开始加载
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/// </summary>
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private void TryLoadAssetBundle()
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{
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var temp = state;
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// 自身已经加成完成的情况
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if (state != BundleState.Done && state != BundleState.WaitDependency)
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{
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if (assetBundle == null)
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{
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// 从等待加载完成后卸载 复活为加载中
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if (state == BundleState.WaitUnload)
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state = BundleState.Loading;
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else
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{
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var pathType = manager.assetPathHub.GetPathState(name);
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switch (pathType)
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{
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case AssetPathState.online:
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StartDownload();
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break;
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case AssetPathState.persist:
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case AssetPathState.streaming:
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{
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loader = manager.loadHub.LoadUnit(name);
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if (loader != null)
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{
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manager.loadHub.onComplete += OnLoadComplete;
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state = BundleState.Loading;
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}
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else
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{
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Debug.LogError("Failed to start load unit for " + name);
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state = BundleState.Error;
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}
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}
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break;
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default:
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{
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Debug.LogError("Unhandled bundle path type " + pathType);
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state = BundleState.Error;
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}
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break;
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}
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}
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|
}
|
|||
|
|
else if (active)
|
|||
|
|
{
|
|||
|
|
state = BundleState.WaitDependency;
|
|||
|
|
RefreshWaitDependencies();
|
|||
|
|
}
|
|||
|
|
else
|
|||
|
|
state = BundleState.Done;
|
|||
|
|
}
|
|||
|
|
SendStateUpdate(temp);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
private void StartDownload()
|
|||
|
|
{
|
|||
|
|
hasDownloaded = true;
|
|||
|
|
// 主动下载优先度调整为 1
|
|||
|
|
downloader = manager.downloadHub.LoadUnit(name, 1);
|
|||
|
|
if (downloader != null)
|
|||
|
|
{
|
|||
|
|
manager.downloadHub.onComplete += OnDownloadComplete;
|
|||
|
|
state = BundleState.Downloading;
|
|||
|
|
}
|
|||
|
|
else
|
|||
|
|
{
|
|||
|
|
Debug.LogError("Failed to start download unit for " + name);
|
|||
|
|
state = BundleState.Error;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// 如果主动和被动加载引用都清空了，开始卸载AssetBundle
|
|||
|
|
/// </summary>
|
|||
|
|
private void TryUnloadAssetBundle()
|
|||
|
|
{
|
|||
|
|
var temp = state;
|
|||
|
|
if (assetBundle != null)
|
|||
|
|
try
|
|||
|
|
{
|
|||
|
|
assetBundle.Unload(true);
|
|||
|
|
assetBundle = null;
|
|||
|
|
}
|
|||
|
|
catch (Exception e)
|
|||
|
|
{
|
|||
|
|
Debug.LogError(e);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (loader != null)
|
|||
|
|
{
|
|||
|
|
state = manager.loadHub.StopUnit(loader) ? BundleState.Unload : BundleState.WaitUnload;
|
|||
|
|
if (state != BundleState.WaitUnload)
|
|||
|
|
manager.loadHub.onComplete -= OnLoadComplete;
|
|||
|
|
}
|
|||
|
|
else if (downloader != null)
|
|||
|
|
{
|
|||
|
|
state = manager.downloadHub.StopUnit(downloader) ? BundleState.Unload : BundleState.WaitUnload;
|
|||
|
|
if (state != BundleState.WaitUnload)
|
|||
|
|
manager.downloadHub.onComplete -= OnDownloadComplete;
|
|||
|
|
}
|
|||
|
|
else
|
|||
|
|
{
|
|||
|
|
state = BundleState.Unload;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
SendStateUpdate(temp);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
private void OnDownloadComplete(BundleDownloader unit)
|
|||
|
|
{
|
|||
|
|
var temp = state;
|
|||
|
|
var load = false;
|
|||
|
|
if (unit == downloader)
|
|||
|
|
{
|
|||
|
|
manager.downloadHub.onComplete -= OnDownloadComplete;
|
|||
|
|
if (downloader.state == AsyncLoadUnitState.Done)
|
|||
|
|
{
|
|||
|
|
// 如果是WaitUnload状态，直接析构加载流程
|
|||
|
|
if (state == BundleState.WaitUnload)
|
|||
|
|
state = BundleState.Unload;
|
|||
|
|
else
|
|||
|
|
load = true;
|
|||
|
|
}
|
|||
|
|
else
|
|||
|
|
{
|
|||
|
|
state = BundleState.Error;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
downloader = null;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (load)
|
|||
|
|
TryLoadAssetBundle();
|
|||
|
|
SendStateUpdate(temp);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
private void OnLoadComplete(AsyncLoadUnit unit)
|
|||
|
|
{
|
|||
|
|
var temp = state;
|
|||
|
|
var unload = false;
|
|||
|
|
if (unit == loader)
|
|||
|
|
{
|
|||
|
|
manager.loadHub.onComplete -= OnLoadComplete;
|
|||
|
|
if (loader.state == AsyncLoadUnitState.Done)
|
|||
|
|
assetBundle = loader.bundle;
|
|||
|
|
if (!assetBundle)
|
|||
|
|
state = BundleState.Error;
|
|||
|
|
else
|
|||
|
|
{
|
|||
|
|
// 如果是WaitUnload状态，直接析构加载的Bundle
|
|||
|
|
if (state == BundleState.WaitUnload)
|
|||
|
|
unload = true;
|
|||
|
|
else
|
|||
|
|
state = BundleState.WaitDependency;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
loader = null;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (unload)
|
|||
|
|
{
|
|||
|
|
TryUnloadAssetBundle();
|
|||
|
|
}
|
|||
|
|
else
|
|||
|
|
{
|
|||
|
|
if (state == BundleState.WaitDependency)
|
|||
|
|
RefreshWaitDependencies();
|
|||
|
|
if (state == BundleState.Done)
|
|||
|
|
RemoveDependencyListen();
|
|||
|
|
else if (state == BundleState.Error)
|
|||
|
|
{
|
|||
|
|
manager.assetPathHub.LoadError(name);
|
|||
|
|
if (hasDownloaded)
|
|||
|
|
RemoveDependencyListen();
|
|||
|
|
else
|
|||
|
|
StartDownload();
|
|||
|
|
}
|
|||
|
|
SendStateUpdate(temp);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
private void RefreshWaitDependencies()
|
|||
|
|
{
|
|||
|
|
if (dependencies == null)
|
|||
|
|
{
|
|||
|
|
state = BundleState.Done;
|
|||
|
|
}
|
|||
|
|
else
|
|||
|
|
{
|
|||
|
|
state = BundleState.Done;
|
|||
|
|
foreach (var dependency in dependencies)
|
|||
|
|
if (dependency.state == BundleState.Error)
|
|||
|
|
{
|
|||
|
|
state = BundleState.Error;
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
else if (dependency.state != BundleState.Done)
|
|||
|
|
{
|
|||
|
|
state = BundleState.WaitDependency;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
private void OnDependencyUpdate(BundleRecord record)
|
|||
|
|
{
|
|||
|
|
if (state == BundleState.WaitDependency)
|
|||
|
|
{
|
|||
|
|
var temp = state;
|
|||
|
|
RefreshWaitDependencies();
|
|||
|
|
if (state == BundleState.Done || state == BundleState.Error)
|
|||
|
|
RemoveDependency();
|
|||
|
|
SendStateUpdate(temp);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
private void RemoveDependencyListen()
|
|||
|
|
{
|
|||
|
|
if (dependencies != null)
|
|||
|
|
foreach (var dependency in dependencies)
|
|||
|
|
dependency.onStateUpdate -= OnDependencyUpdate;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
private void SendStateUpdate(BundleState oldState)
|
|||
|
|
{
|
|||
|
|
if (oldState != state && onStateUpdate != null)
|
|||
|
|
onStateUpdate.Invoke(this);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
public enum BundleState
|
|||
|
|
{
|
|||
|
|
Unload, // 已经析构完成
|
|||
|
|
WaitUnload, // 试图析构，但需要等待AssetBundle完成加载以防止泄漏
|
|||
|
|
Downloading, // 自身下载中
|
|||
|
|
Loading, // 自身加载中
|
|||
|
|
WaitDependency, // 自身加载完成，等待依赖项加载完成
|
|||
|
|
Done, // 全部加载完成，可以提取资源
|
|||
|
|
Error // 资源加载失败。可能由于资源不存在或者其他网络问题
|
|||
|
|
}
|
|||
|
|
}
|