78 lines
2.4 KiB
C#
78 lines
2.4 KiB
C#
#nullable disable
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#pragma warning disable CS1591
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using System;
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namespace MediaBrowser.Model.Dlna
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{
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public static class ResolutionNormalizer
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{
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private static readonly ResolutionConfiguration[] Configurations =
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new[]
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{
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new ResolutionConfiguration(426, 320000),
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new ResolutionConfiguration(640, 400000),
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new ResolutionConfiguration(720, 950000),
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new ResolutionConfiguration(1280, 2500000),
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new ResolutionConfiguration(1920, 4000000),
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new ResolutionConfiguration(2560, 20000000),
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new ResolutionConfiguration(3840, 35000000)
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};
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public static ResolutionOptions Normalize(
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int? inputBitrate,
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int outputBitrate,
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int? maxWidth,
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int? maxHeight)
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{
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// If the bitrate isn't changing, then don't downscale the resolution
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if (inputBitrate.HasValue && outputBitrate >= inputBitrate.Value)
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{
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if (maxWidth.HasValue || maxHeight.HasValue)
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{
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return new ResolutionOptions
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{
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MaxWidth = maxWidth,
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MaxHeight = maxHeight
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};
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}
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}
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var resolutionConfig = GetResolutionConfiguration(outputBitrate);
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if (resolutionConfig is not null)
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{
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var originvalValue = maxWidth;
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maxWidth = Math.Min(resolutionConfig.MaxWidth, maxWidth ?? resolutionConfig.MaxWidth);
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if (!originvalValue.HasValue || originvalValue.Value != maxWidth.Value)
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{
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maxHeight = null;
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}
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}
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return new ResolutionOptions
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{
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MaxWidth = maxWidth,
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MaxHeight = maxHeight
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};
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}
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private static ResolutionConfiguration GetResolutionConfiguration(int outputBitrate)
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{
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ResolutionConfiguration previousOption = null;
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foreach (var config in Configurations)
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{
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if (outputBitrate <= config.MaxBitrate)
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{
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return previousOption ?? config;
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}
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previousOption = config;
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}
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return null;
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}
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}
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}
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