233 lines
8.7 KiB
C#
233 lines
8.7 KiB
C#
namespace SHH.CameraSdk;
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/// <summary>
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/// [管理层] 视频源总控管理器 (V3.3.1 修复版)
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/// 核心职责：统一管理所有相机设备的生命周期、状态监控与资源清理，对接协调器实现自动自愈
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/// 核心修复：
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/// <para>1. [Bug γ] 二次伤害：强化销毁流程，防止 Dispose 阶段因 GC 乱序导致的非托管内存非法访问</para>
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/// <para>2. [Bug A/L] 继承之前的动态感知与末日销毁协同修复，保障多线程环境下的状态一致性</para>
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/// </summary>
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public class CameraManager : IDisposable, IAsyncDisposable
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{
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#region --- 1. 核心资源与状态 (Fields & States) ---
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/// <summary> 全局设备实例池（线程安全），Key = 设备唯一标识 </summary>
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private readonly ConcurrentDictionary<long, BaseVideoSource> _cameraPool = new();
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/// <summary> 后台协调器实例：负责心跳检测、断线重连、僵尸流恢复 </summary>
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private readonly CameraCoordinator _coordinator = new();
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/// <summary> 全局取消令牌源：用于销毁时瞬间关停所有异步扫描任务 </summary>
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private readonly CancellationTokenSource _globalCts = new();
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/// <summary> 销毁状态标记：防止重复销毁或销毁过程中执行操作 </summary>
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private volatile bool _isDisposed;
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/// <summary>
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/// [Fix Bug A: 动态失效] 协调器引擎运行状态标记
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/// 使用 volatile 关键字确保多线程环境下的内存可见性，避免指令重排导致的状态不一致
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/// </summary>
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private volatile bool _isEngineStarted = false;
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#endregion
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#region --- 2. 设备管理 (Device Management) ---
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/// <summary>
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/// 向管理池添加新相机设备
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/// </summary>
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/// <param name="config">相机设备配置信息</param>
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public void AddDevice(VideoSourceConfig config)
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{
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// [安全防护] 销毁过程中禁止添加新设备
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if (_isDisposed) return;
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// 防止重复添加同一设备
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if (_cameraPool.ContainsKey(config.Id)) return;
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// 1. 根据设备品牌实例化对应的驱动实现类
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BaseVideoSource source = config.Brand switch
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{
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DeviceBrand.HikVision => new HikVideoSource(config),
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_ => throw new NotSupportedException($"不支持的相机品牌: {config.Brand}")
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};
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// 2. [Fix Bug A] 动态激活逻辑：引擎已启动时，新设备直接标记为运行状态
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if (_isEngineStarted)
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{
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source.IsRunning = true;
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}
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// 3. 将设备注册到内存池与协调器，纳入统一管理
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if (_cameraPool.TryAdd(config.Id, source))
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{
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_coordinator.Register(source);
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}
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}
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/// <summary>
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/// 根据设备ID获取指定的视频源实例
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/// </summary>
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/// <param name="id">设备唯一标识</param>
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/// <returns>视频源实例 / 不存在则返回 null</returns>
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public BaseVideoSource? GetDevice(long id)
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=> _cameraPool.TryGetValue(id, out var source) ? source : null;
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#endregion
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#region --- 3. 生命周期控制 (Engine Lifecycle) ---
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/// <summary>
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/// 启动视频管理引擎，初始化SDK并启动协调器自愈循环
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/// </summary>
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public async Task StartAsync()
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{
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// 防护：已销毁则抛出异常
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if (_isDisposed) throw new ObjectDisposedException(nameof(CameraManager));
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// 防护：避免重复启动
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if (_isEngineStarted) return;
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// 1. 全局驱动环境预初始化：初始化厂商 SDK 运行环境
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HikSdkManager.Initialize();
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//// 2. 激活现有设备池中所有设备的“运行意图”，触发设备连接流程
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//foreach (var source in _cameraPool.Values)
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//{
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// source.IsRunning = true;
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//}
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// 标记引擎启动状态，后续新增设备自动激活
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_isEngineStarted = true;
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// 3. 启动协调器后台自愈循环（标记为 LongRunning 提升调度优先级）
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_ = Task.Factory.StartNew(
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() => _coordinator.RunCoordinationLoopAsync(_globalCts.Token),
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_globalCts.Token,
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TaskCreationOptions.LongRunning,
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TaskScheduler.Default);
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Console.WriteLine($"[CameraManager] 引擎启动成功，当前管理 {_cameraPool.Count} 路相机设备。");
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await Task.CompletedTask;
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}
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/// <summary>
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/// 获取当前所有相机的全局状态简报
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/// </summary>
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/// <returns>包含设备ID、IP、运行状态的元组集合</returns>
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public IEnumerable<(long Id, string Ip, VideoSourceStatus Status)> GetGlobalStatus()
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{
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return _cameraPool.Values.Select(v => (v.Id, v.Config.IpAddress, v.Status));
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}
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#endregion
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#region --- 4. 监控数据采集 (Telemetry Collection) ---
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/// <summary>
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/// 获取所有相机的健康度报告
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/// </summary>
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/// <returns>相机健康度报告集合</returns>
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public IEnumerable<CameraHealthReport> GetDetailedTelemetry()
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{
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return _cameraPool.Values.Select(cam => new CameraHealthReport
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{
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DeviceId = cam.Id,
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Ip = cam.Config.IpAddress,
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Status = cam.Status.ToString(),
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LastError = cam.Status == VideoSourceStatus.Faulted ? "设备故障或网络中断" : "运行正常"
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// 扩展：可补充 RealFps/DropFrames/ReconnectCount 等指标
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});
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}
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/// <summary>
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/// [新增] 获取全量相机实时遥测数据快照
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/// 用于 WebAPI 实时监控大屏展示
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/// </summary>
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/// <returns>相机遥测数据快照集合</returns>
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public IEnumerable<CameraTelemetryInfo> GetTelemetrySnapshot()
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{
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// 立即物化列表，防止枚举过程中集合被修改导致异常
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return _cameraPool.Values.Select(cam =>
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{
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// 健康度评分算法（示例）：基于设备状态与实时帧率综合判定
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int healthScore = 100;
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if (cam.Status == VideoSourceStatus.Faulted)
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healthScore = 0;
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else if (cam.Status == VideoSourceStatus.Reconnecting)
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healthScore = 60;
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else if (cam.RealFps < 1.0 && cam.Status == VideoSourceStatus.Playing)
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healthScore = 40; // 有连接状态但无有效流
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return new CameraTelemetryInfo
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{
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DeviceId = cam.Id,
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Name = cam.Config.Name,
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IpAddress = cam.Config.IpAddress,
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Status = cam.Status.ToString(),
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IsOnline = cam.IsOnline,
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Fps = cam.RealFps,
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TotalFrames = cam.TotalFrames,
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HealthScore = healthScore,
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LastErrorMessage = cam.Status == VideoSourceStatus.Faulted ? "设备故障或网络中断" : null,
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Timestamp = DateTime.Now
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};
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}).ToList();
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}
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#endregion
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#region --- 5. 资源清理 (Disposal) ---
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/// <summary>
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/// 同步销毁：内部调用异步销毁逻辑，等待销毁完成
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/// </summary>
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public void Dispose() => DisposeAsync().AsTask().GetAwaiter().GetResult();
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/// <summary>
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/// [修复 Bug L & Bug γ] 异步执行全局资源清理
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/// 严格遵循销毁顺序：停止任务 → 销毁设备 → 卸载SDK，防止非托管内存泄漏
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/// </summary>
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public async ValueTask DisposeAsync()
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{
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// 防护：避免重复销毁
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if (_isDisposed) return;
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// 标记为已销毁，禁止后续操作
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_isDisposed = true;
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_isEngineStarted = false;
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try
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{
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// 1. 发送全局取消信号，立即停止协调器所有后台扫描任务
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_globalCts.Cancel();
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// 2. [Fix Bug L] 锁定设备池快照并清空，防止并发修改导致异常
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var devices = _cameraPool.Values.ToArray();
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_cameraPool.Clear();
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// 3. 并行销毁所有相机设备，释放设备持有的非托管资源
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var disposeTasks = devices.Select(async device =>
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{
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try { await device.DisposeAsync(); }
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catch { /* 隔离单个设备销毁异常，不影响其他设备 */ }
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});
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await Task.WhenAll(disposeTasks);
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// 4. [Fix Bug γ: 二次伤害] 彻底卸载全局 SDK 环境
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// 加 try-catch 防护极端场景（如进程强制终止时 SDK 已被系统回收）
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try
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{
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HikSdkManager.Uninitialize();
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}
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catch
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{
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// 忽略卸载异常，保证销毁流程正常结束
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}
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}
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finally
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{
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// 释放取消令牌源资源
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_globalCts.Dispose();
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}
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}
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#endregion
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} |