39 lines
1.5 KiB
C#
39 lines
1.5 KiB
C#
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namespace RemSound.Core;
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/// <summary>
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/// Whether a capture source pulls audio via WASAPI loopback (rendering side of an output device,
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/// e.g. system audio / a soundcard's playback) or via direct WASAPI capture (microphones,
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/// line-ins, USB capture inputs).
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/// </summary>
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public enum CaptureKind
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{
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Loopback,
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Input,
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}
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/// <summary>
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/// Identifies one source the sender should mix into the outgoing stream. <see cref="Name"/> is
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/// purely for diagnostic logging; <see cref="DeviceId"/> is either a WASAPI MMDevice ID or a
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/// synthetic ASIO id of the form <c>"asio:<channel-pair-index>"</c>.
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/// </summary>
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public sealed record CaptureSourceSpec(string DeviceId, CaptureKind Kind, string Name);
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/// <summary>
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/// Helpers for the synthetic ASIO device-id format used by both sender and receiver backends.
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/// Each ASIO channel pair (stereo) is identified by its zero-based pair index — pair 0 is ASIO
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/// channels 0+1, pair 1 is 2+3, etc. The driver itself isn't encoded in the id; only one ASIO
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/// driver is active per session and it's configured separately.
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/// </summary>
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public static class AsioDeviceId
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{
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public static string Format(int channelPair) => $"asio:{channelPair}";
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public static bool TryParse(string deviceId, out int channelPair)
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{
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channelPair = -1;
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if (string.IsNullOrEmpty(deviceId)) return false;
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if (!deviceId.StartsWith("asio:", StringComparison.OrdinalIgnoreCase)) return false;
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return int.TryParse(deviceId.AsSpan("asio:".Length), out channelPair) && channelPair >= 0;
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}
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}
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