90 lines
5.9 KiB
Swift
90 lines
5.9 KiB
Swift
import SwiftUI
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import CoreAudio
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struct DJAudioRoute: Codable, Equatable {
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var uid = ""
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var firstChannel = 0
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}
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struct DJAudioRouting: Codable, Equatable {
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var mode = "Internal"
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var main = DJAudioRoute()
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var deckA = DJAudioRoute()
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var deckB = DJAudioRoute()
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var cue = DJAudioRoute()
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func route(_ letter: String) -> DJAudioRoute { mode == "External" ? (letter == "A" ? deckA : deckB) : main }
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static func channelMap(channels: Int,first: Int) throws -> [Int32] {
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guard channels >= 2,first >= 0,first % 2 == 0,first+1 < channels else { throw LibraryError.message("Choose an available stereo channel pair.") }
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var map = [Int32](repeating:-1,count:channels);map[first] = 0;map[first+1] = 1;return map
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}
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func validate(devices: [DJAudioDevice],defaultID: AudioDeviceID?) throws {
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func resolved(_ route: DJAudioRoute) throws -> DJAudioDevice {
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guard let device = devices.first(where:{route.uid.isEmpty ? $0.id == defaultID : $0.uid == route.uid}) else { throw LibraryError.message("An audio output is unavailable. Reconnect it or choose another device.") }
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_ = try Self.channelMap(channels:device.outputChannels,first:route.firstChannel);return device
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}
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let outputs = mode == "External" ? [deckA,deckB] : [main]
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for route in outputs { _ = try resolved(route) }
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if mode == "External",try resolved(deckA).id == resolved(deckB).id,deckA.firstChannel == deckB.firstChannel {
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throw LibraryError.message("External mixer decks need separate output devices or channel pairs.")
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}
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if !cue.uid.isEmpty {
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let cueDevice = try resolved(cue)
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for route in outputs where try resolved(route).id == cueDevice.id && route.firstChannel == cue.firstChannel {
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throw LibraryError.message("Pre-cueing overlaps a public output. Choose another channel pair or device.")
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}
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}
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}
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}
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@MainActor final class DJAudioDeviceMonitor {
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private var address = AudioObjectPropertyAddress(mSelector:kAudioHardwarePropertyDevices,mScope:kAudioObjectPropertyScopeGlobal,mElement:kAudioObjectPropertyElementMain)
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private var block: AudioObjectPropertyListenerBlock?
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init(_ changed: @escaping @MainActor () -> Void) {
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let listener: AudioObjectPropertyListenerBlock = { _,_ in Task { @MainActor in changed() } }
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block = listener;AudioObjectAddPropertyListenerBlock(AudioObjectID(kAudioObjectSystemObject),&address,.main,listener)
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}
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deinit { if let block { AudioObjectRemovePropertyListenerBlock(AudioObjectID(kAudioObjectSystemObject),&address,.main,block) } }
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}
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struct DJAudioDevicesPane: View {
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@ObservedObject var system: DJSystem
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@State private var draft = DJAudioRouting()
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var body: some View {
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VStack(alignment:.leading,spacing:26) {
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PreferencesSection("Audio Routing") {
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VStack(spacing:22) {
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HStack { Text("Mixer Mode:").frame(width:130,alignment:.trailing);Picker("Mixer Mode",selection:$draft.mode) { Text("Internal").tag("Internal");Text("External").tag("External") }.pickerStyle(.radioGroup).horizontalRadioGroupLayout().labelsHidden();Spacer() }
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if draft.mode == "Internal" { row("Main Output",route:$draft.main,icon:"hifispeaker.fill") }
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else { row("Deck A",route:$draft.deckA,icon:"a.circle");row("Deck B",route:$draft.deckB,icon:"b.circle") }
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row("Pre-Cueing",route:$draft.cue,icon:"headphones",optional:true)
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HStack { Text("Cue Volume:").frame(width:130,alignment:.trailing);Slider(value:$system.cueLevel,in:0...1).frame(maxWidth:320);Spacer() }
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}.padding(.vertical,22)
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}
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Text(draft.mode == "Internal" ? "Internal mixes both decks through the main output. Pre-cueing can use channels 3–4 on the same four-channel sound card." : "External sends each deck to its own stereo pair. The software crossfader is bypassed; mix the outputs on your external mixer.").font(.callout).foregroundStyle(.secondary)
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if system.devices.isEmpty { Text("No audio outputs reported by macOS. Reconnect the interface and refresh.").foregroundStyle(.orange) }
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HStack {
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Button("Refresh Devices") { system.refreshDevices() }
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Spacer()
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Button("Revert") { draft = system.routing }.disabled(draft == system.routing)
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Button("Apply") { system.applyRouting(draft) }.buttonStyle(.borderedProminent).disabled(draft == system.routing)
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}
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Text("Booth, microphone and recording input are not available. Karaoke has its own output settings.").font(.caption).foregroundStyle(.secondary)
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}.onAppear { system.refreshDevices();draft = system.routing }
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}
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private func row(_ label: String,route: Binding<DJAudioRoute>,icon: String,optional: Bool = false) -> some View {
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let device = system.devices.first { route.wrappedValue.uid.isEmpty ? $0.id == DJAudioDevice.defaultOutput() : $0.uid == route.wrappedValue.uid }
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let pairs = Array(stride(from:0,to:max(0,(device?.outputChannels ?? 2)-1),by:2))
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return HStack(spacing:12) {
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Text(label+":").frame(width:130,alignment:.trailing)
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Picker(label,selection:Binding(get:{route.wrappedValue.uid},set:{route.wrappedValue = .init(uid:$0,firstChannel:0)})) {
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Text(optional ? "None" : "System default").tag("")
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ForEach(system.devices) { Text($0.name).tag($0.uid) }
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if !route.wrappedValue.uid.isEmpty,device == nil { Text("Disconnected device").tag(route.wrappedValue.uid) }
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}.labelsHidden().frame(maxWidth:340)
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Image(systemName:icon).foregroundStyle(.secondary).frame(width:24)
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Picker("\(label) channels",selection:route.firstChannel) {
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ForEach(pairs,id:\.self) { Text("ch \($0+1)–\($0+2)").tag($0) }
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}.labelsHidden().frame(width:110).disabled(optional && route.wrappedValue.uid.isEmpty)
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}
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}
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}
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