174 lines
10 KiB
Swift
174 lines
10 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 controllerPreset(_ device: DJAudioDevice,mode: String) -> Self {
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var routing = Self();routing.mode = mode
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routing.main = .init(uid:device.uid,firstChannel:0)
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routing.deckA = routing.main
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routing.deckB = .init(uid:device.uid,firstChannel:device.outputChannels >= 4 ? 2 : 0)
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if mode == "Internal",device.outputChannels >= 4 { routing.cue = .init(uid:device.uid,firstChannel:2) }
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return routing
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}
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func changingMode(_ mode: String,preferred: DJAudioDevice?) -> Self {
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var next = self;next.mode = mode
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if mode == "External" {
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if next.deckA == DJAudioRoute(),next.deckB == DJAudioRoute(),let preferred {
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next.deckA = .init(uid:preferred.uid,firstChannel:0);next.deckB = .init(uid:preferred.uid,firstChannel:2)
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}
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if !next.cue.uid.isEmpty,[next.deckA,next.deckB].contains(next.cue) { next.cue = .init() }
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}
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return next
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}
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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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private var recommended: DJAudioDevice? { system.devices.first { $0.name.localizedCaseInsensitiveContains("MixTrack") && $0.outputChannels >= 4 } ?? system.devices.first{$0.outputChannels >= 4} }
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private var validation: String? {
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do { try draft.validate(devices:system.devices,defaultID:DJAudioDevice.defaultOutput());return nil }
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catch { return error.localizedDescription }
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}
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var body: some View {
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VStack(spacing:16) {
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ScrollView {
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VStack(alignment:.leading,spacing:22) {
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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:Binding(get:{draft.mode},set:{draft = draft.changingMode($0,preferred:recommended)})) { Text("Internal").tag("Internal");Text("External").tag("External") }.pickerStyle(.radioGroup).horizontalRadioGroupLayout().labelsHidden();Spacer() }
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if draft.mode == "Internal" { row("Main Output",route:$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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if let recommended {
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Button("Use \(recommended.name)") { draft = .controllerPreset(recommended,mode:draft.mode) }
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.help("Use the controller’s stereo pairs immediately")
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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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if let validation { Text(validation).font(.callout).foregroundStyle(.orange) }
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PreferencesSection("Detected Audio Devices") {
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ForEach(system.detectedDevices) { device in
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HStack(alignment:.top) {
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Text(device.name).frame(maxWidth:.infinity,alignment:.leading)
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VStack(alignment:.trailing,spacing:3) {
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Text("\(device.outputChannels) out · \(device.inputChannels) in")
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if device.outputChannels >= 2 {
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Text(device.stereoPairs.map { "ch \($0+1)–\($0+2)" }.joined(separator:", ")).foregroundStyle(.secondary)
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} else { Text(device.outputChannels == 0 ? "Input only" : "Mono output").foregroundStyle(.secondary) }
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}
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}.font(.caption).padding(.vertical,3)
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}
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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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}
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}
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Divider()
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HStack {
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Button("Refresh Devices") { system.refreshDevices() }
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Spacer()
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if validation != nil { Button("Revert invalid changes") { draft = system.routing } }
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Text("Changes apply immediately").font(.caption).foregroundStyle(.secondary)
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}
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}.onAppear {
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system.refreshDevices();draft = system.routing
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}
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.onStudioChange(of:draft) { next in
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if next != system.routing,validation == nil { system.applyRouting(next) }
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}
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.task {
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while !Task.isCancelled {
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do { try await Task.sleep(nanoseconds:2_000_000_000) } catch { return }
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system.refreshDevices()
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}
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}
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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 = device?.stereoPairs ?? [0]
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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($0.uid) }
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if !route.wrappedValue.uid.isEmpty,device == nil { Text("Disconnected device").tag(route.wrappedValue.uid) }
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}.labelsHidden().frame(maxWidth:340)
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Image(systemName:icon).foregroundStyle(.secondary).frame(width:24)
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DJAudioChannelPicker(value:route.firstChannel,pairs:pairs,label:label+" channels")
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.frame(width:110,height:26).disabled(optional && route.wrappedValue.uid.isEmpty)
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}
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}
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}
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// Explicit native menus keep every reported channel pair visible and keyboard accessible.
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struct DJAudioChannelPicker: NSViewRepresentable {
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@Binding var value: Int
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let pairs: [Int]
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let label: String
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func makeCoordinator() -> Coordinator { Coordinator(value:$value) }
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func makeNSView(context: Context) -> NSPopUpButton {
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let button = NSPopUpButton(frame:.zero,pullsDown:false)
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button.target = context.coordinator;button.action = #selector(Coordinator.changed(_:))
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button.setAccessibilityLabel(label);button.identifier = NSUserInterfaceItemIdentifier(label);return button
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}
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func updateNSView(_ button: NSPopUpButton,context: Context) {
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context.coordinator.value = $value
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if button.itemArray.map(\.tag) != pairs {
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button.removeAllItems()
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for pair in pairs { button.addItem(withTitle:"ch \(pair+1)–\(pair+2)");button.lastItem?.tag = pair }
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}
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button.selectItem(withTag:value);button.isEnabled = context.environment.isEnabled
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button.setAccessibilityLabel(label)
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}
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func sizeThatFits(_ proposal: ProposedViewSize,nsView: NSPopUpButton,context: Context) -> CGSize? { .init(width:proposal.width ?? 110,height:26) }
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final class Coordinator: NSObject {
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var value: Binding<Int>
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init(value: Binding<Int>) { self.value = value }
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@objc func changed(_ sender: NSPopUpButton) { if let selected = sender.selectedItem { value.wrappedValue = selected.tag } }
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}
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}
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