103 lines
2.7 KiB
C#
103 lines
2.7 KiB
C#
using System.Collections.Generic;
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using System.Globalization;
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using EmbyToolbox.Models;
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namespace EmbyToolbox.Services;
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public static class VideoBitratePolicy
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{
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public const string Auto = "Auto";
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public const string Source = "Source";
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public const string Custom = "Custom";
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public static IReadOnlyList<string> UiOptions { get; } =
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[
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Auto,
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Source,
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"2 Mbps",
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"4 Mbps",
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"6 Mbps",
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"8 Mbps",
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"10 Mbps",
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"12 Mbps",
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"15 Mbps",
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"20 Mbps",
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Custom
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];
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public static string NormalizeMode(string? mode) =>
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mode switch
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{
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Source => Source,
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Custom => Custom,
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_ => TryParseFixedModeKbps(mode) is { } fixedKbps
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? $"{fixedKbps / 1000.0:0.###} Mbps".Replace(".000", string.Empty, StringComparison.Ordinal)
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: Auto
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};
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public static int? ResolveTargetKbps(string? mode, double? customMbps, MediaAnalysisResult? media)
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{
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var normalized = NormalizeMode(mode);
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if (normalized == Auto)
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{
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return null;
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}
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if (normalized == Source)
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{
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return media?.SourceVideoBitrateBps is { } bps && bps > 0
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? Math.Max(1, (int)Math.Round(bps / 1000.0, MidpointRounding.AwayFromZero))
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: null;
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}
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if (normalized == Custom)
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{
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return customMbps is { } mbps && mbps > 0
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? Math.Max(1, (int)Math.Round(mbps * 1000.0, MidpointRounding.AwayFromZero))
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: null;
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}
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return TryParseFixedModeKbps(normalized);
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}
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public static int? TryParseFixedModeKbps(string? mode)
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{
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if (string.IsNullOrWhiteSpace(mode))
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{
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return null;
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}
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var m = mode.Trim();
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if (m.Equals(Auto, StringComparison.OrdinalIgnoreCase)
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|| m.Equals(Source, StringComparison.OrdinalIgnoreCase)
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|| m.Equals(Custom, StringComparison.OrdinalIgnoreCase))
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{
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return null;
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}
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if (!m.EndsWith("Mbps", StringComparison.OrdinalIgnoreCase))
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{
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return null;
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}
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var number = m[..^4].Trim();
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if (!double.TryParse(number.Replace(',', '.'), NumberStyles.Any, CultureInfo.InvariantCulture, out var mbps) || mbps <= 0)
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{
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return null;
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}
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return Math.Max(1, (int)Math.Round(mbps * 1000.0, MidpointRounding.AwayFromZero));
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}
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public static string FormatCurrentSource(long? bps)
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{
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if (bps is not { } value || value <= 0)
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{
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return "Текущее: неизвестно";
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}
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var mbps = value / 1_000_000d;
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return $"Текущее: {mbps:0.###} Mbps";
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}
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}
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