57 lines
2.3 KiB
C#
57 lines
2.3 KiB
C#
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namespace SHH.CameraSdk;
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/// <summary>
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/// 视频分辨率档位描述符（Record 类型，不可变对象）
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/// 核心职责：定义相机通道在特定编码格式下支持的分辨率、帧率上限及友好描述
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/// 协作场景：
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/// <para>1. 前端界面：展示清晰度选择下拉列表</para>
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/// <para>2. 配置校验：下发分辨率前判断是否符合硬件能力，防止超限黑屏</para>
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/// <para>3. 性能评估：通过总像素量计算编码/解码的计算负载与带宽压力</para>
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/// </summary>
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/// <param name="Width">画面像素宽度（如 1920、3840）</param>
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/// <param name="Height">画面像素高度（如 1080、2160）</param>
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/// <param name="MaxFps">该分辨率下硬件支持的最大输出帧率（防止超限配置）</param>
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/// <param name="Description">档位友好描述（如 "高清(1080P/H.265)"）</param>
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public record ResolutionProfile(
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int Width,
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int Height,
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int MaxFps,
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string Description
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)
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{
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#region --- 计算属性 (Derived Properties) ---
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/// <summary>
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/// 当前档位的总像素量
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/// 业务用途：衡量编码/解码的计算负载、网络传输的带宽压力
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/// 计算公式：Width * Height
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/// </summary>
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public long TotalPixels => (long)Width * Height;
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/// <summary>
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/// 当前档位的屏幕宽高比
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/// 业务用途：前端渲染容器（WinForm/WPF/Web）自动调整比例，避免画面拉伸变形
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/// 保护逻辑：高度为 0 时返回 0，防止除零异常
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/// </summary>
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public double AspectRatio => Height == 0 ? 0 : (double)Width / Height;
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/// <summary>
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/// 判断当前档位是否属于高清范畴（行业标准：720P 及以上，即 1280x720 分辨率）
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/// 业务用途：前端分类展示、带宽策略选择
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/// </summary>
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public bool IsHighDefinition => Width >= 1280 && Height >= 720;
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#endregion
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#region --- 重写方法 (Overridden Methods) ---
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/// <summary>
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/// 格式化分辨率档位的显示文本
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/// 输出格式：友好描述 (宽x高@最大帧率fps)
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/// 示例：高清(1080P/H.265) (1920x1080@30fps)
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/// </summary>
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/// <returns>格式化的显示字符串</returns>
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public override string ToString() => $"{Description} ({Width}x{Height}@{MaxFps}fps)";
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#endregion
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}
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