33 lines
1.9 KiB
C#
33 lines
1.9 KiB
C#
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namespace VoiceCat.Codec;
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public enum OpusApplication { Voip = 2048, Audio = 2049, LowDelay = 2051 }
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public sealed record OpusOptions
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{
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public int SampleRate { get; init; } = 48000;
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public int Channels { get; init; } = 1;
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public int FrameDurationMilliseconds { get; init; } = 20;
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public int Bitrate { get; init; } = 24000;
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public int MaximumBandwidthHz { get; init; }
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public int Complexity { get; init; } = 10;
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public int ExpectedPacketLossPercent { get; init; }
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public bool ForwardErrorCorrection { get; init; } = true;
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public bool DiscontinuousTransmission { get; init; }
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public bool DeepRedundancy { get; init; }
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public OpusApplication Application { get; init; } = OpusApplication.Voip;
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public int SamplesPerChannel => SampleRate / 1000 * FrameDurationMilliseconds;
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internal void Validate()
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{
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if (SampleRate is not (8000 or 12000 or 16000 or 24000 or 48000)) throw new ArgumentOutOfRangeException(nameof(SampleRate));
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if (Channels is not (1 or 2)) throw new ArgumentOutOfRangeException(nameof(Channels));
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if (FrameDurationMilliseconds is not (10 or 20 or 40 or 60)) throw new ArgumentOutOfRangeException(nameof(FrameDurationMilliseconds));
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if (Application == OpusApplication.LowDelay && FrameDurationMilliseconds > 20) throw new ArgumentException("Low-delay Opus requires frames of at most 20 ms.");
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if (!Enum.IsDefined(Application)) throw new ArgumentOutOfRangeException(nameof(Application));
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if (Bitrate is < 500 or > 512000) throw new ArgumentOutOfRangeException(nameof(Bitrate));
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if (Complexity is < 0 or > 10) throw new ArgumentOutOfRangeException(nameof(Complexity));
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if (ExpectedPacketLossPercent is < 0 or > 100) throw new ArgumentOutOfRangeException(nameof(ExpectedPacketLossPercent));
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ArgumentOutOfRangeException.ThrowIfNegative(MaximumBandwidthHz);
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}
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}
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