40 lines
1.5 KiB
C#
40 lines
1.5 KiB
C#
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using System.Threading.Channels;
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using SHH.Contracts;
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namespace SHH.CameraService
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{
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/// <summary>
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/// 视频数据内部总线 (线程安全的生产者-消费者通道)
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/// <para>作用：解耦 [采集编码线程] 与 [网络发送线程]</para>
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/// </summary>
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public class VideoDataChannel
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{
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// 限制容量为 100 帧。如果积压超过 100 帧，说明发送端彻底堵死了，必须丢帧。
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private readonly Channel<VideoPayload> _channel;
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public VideoDataChannel(int capacity = 10)
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{
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var options = new BoundedChannelOptions(capacity)
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{
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FullMode = BoundedChannelFullMode.DropOldest, // 核心策略：满了就丢弃最旧的帧
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SingleReader = false, // 允许多个发送 Worker (如 CloudWorker, ScreenWorker) 同时读取
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SingleWriter = true // 只有一个采集线程在写
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};
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_channel = Channel.CreateBounded<VideoPayload>(options);
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}
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/// <summary>
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/// [生产者] 写入一个封装好的数据包 (非阻塞)
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/// </summary>
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public void WriteLog(VideoPayload payload)
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{
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// TryWrite 永远不会等待，满了就丢旧的写入新的，返回 true
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_channel.Writer.TryWrite(payload);
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}
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/// <summary>
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/// [消费者] 读取器
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/// </summary>
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public ChannelReader<VideoPayload> Reader => _channel.Reader;
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}
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}
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