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"info" : { + "author" : "xcode", + "version" : 1 + } +} diff --git a/AudioVUMeter/AudioVUMeter/Assets.xcassets/Contents.json b/AudioVUMeter/AudioVUMeter/Assets.xcassets/Contents.json new file mode 100644 index 0000000..73c0059 --- /dev/null +++ b/AudioVUMeter/AudioVUMeter/Assets.xcassets/Contents.json @@ -0,0 +1,6 @@ +{ + "info" : { + "author" : "xcode", + "version" : 1 + } +} diff --git a/AudioVUMeter/AudioVUMeter/AudioEngine.swift b/AudioVUMeter/AudioVUMeter/AudioEngine.swift new file mode 100644 index 0000000..74bd878 --- /dev/null +++ b/AudioVUMeter/AudioVUMeter/AudioEngine.swift @@ -0,0 +1,431 @@ +// +// AudioEngine.swift +// AudioVUMeter +// +// Core Audio engine for capturing audio from BlackHole or any input device +// Calculates RMS levels and converts to dB for VU meter display +// + +import Foundation +import AVFoundation +import CoreAudio +import Combine + +/// Represents an available audio input device +struct AudioDevice: Identifiable, Hashable { + let id: AudioDeviceID + let name: String + let uid: String + let inputChannels: Int +} + +/// Main audio engine class for capturing and analyzing audio levels +class AudioEngine: ObservableObject { + // MARK: - Published Properties + + /// Current audio levels (0.0 to 1.0) + @Published var leftLevel: Double = 0 + @Published var rightLevel: Double = 0 + + /// Peak levels with hold + @Published var leftPeak: Double = 0 + @Published var rightPeak: Double = 0 + + /// Levels in dB (-inf to 0) + @Published var leftLevelDB: Double = -60 + @Published var rightLevelDB: Double = -60 + + /// Engine state + @Published var isRunning = false + @Published var selectedDeviceID: AudioDeviceID = 0 + @Published var selectedDeviceName: String = "No Device" + @Published var availableDevices: [AudioDevice] = [] + + /// Settings + @Published var referenceLevel: Double = -18 // Reference level in dB + @Published var peakHoldTime: Double = 2.0 // Peak hold time in seconds + + // MARK: - Private Properties + + private var audioEngine: AVAudioEngine? + private var inputNode: AVAudioInputNode? + private var peakResetTimers: [Timer] = [] + + private let levelSmoothingFactor: Double = 0.3 + private var previousLeftLevel: Double = 0 + private var previousRightLevel: Double = 0 + + // MARK: - Initialization + + init() { + refreshDeviceList() + selectBlackHoleDevice() + } + + // MARK: - Device Management + + /// Refresh the list of available audio input devices + func refreshDeviceList() { + availableDevices = getInputDevices() + + if availableDevices.isEmpty { + selectedDeviceName = "No Input Devices" + } + } + + /// Get all available audio input devices + private func getInputDevices() -> [AudioDevice] { + var devices: [AudioDevice] = [] + + var propertyAddress = AudioObjectPropertyAddress( + mSelector: kAudioHardwarePropertyDevices, + mScope: kAudioObjectPropertyScopeGlobal, + mElement: kAudioObjectPropertyElementMain + ) + + var propertySize: UInt32 = 0 + var status = AudioObjectGetPropertyDataSize( + AudioObjectID(kAudioObjectSystemObject), + &propertyAddress, + 0, + nil, + &propertySize + ) + + guard status == noErr else { return devices } + + let deviceCount = Int(propertySize) / MemoryLayout.size + var deviceIDs = [AudioDeviceID](repeating: 0, count: deviceCount) + + status = AudioObjectGetPropertyData( + AudioObjectID(kAudioObjectSystemObject), + &propertyAddress, + 0, + nil, + &propertySize, + &deviceIDs + ) + + guard status == noErr else { return devices } + + for deviceID in deviceIDs { + // Check if device has input channels + let inputChannels = getDeviceInputChannels(deviceID: deviceID) + guard inputChannels > 0 else { continue } + + // Get device name + let name = getDeviceName(deviceID: deviceID) + let uid = getDeviceUID(deviceID: deviceID) + + devices.append(AudioDevice( + id: deviceID, + name: name, + uid: uid, + inputChannels: inputChannels + )) + } + + return devices + } + + /// Get device name + private func getDeviceName(deviceID: AudioDeviceID) -> String { + var propertyAddress = AudioObjectPropertyAddress( + mSelector: kAudioDevicePropertyDeviceNameCFString, + mScope: kAudioObjectPropertyScopeGlobal, + mElement: kAudioObjectPropertyElementMain + ) + + var name: CFString = "" as CFString + var propertySize = UInt32(MemoryLayout.size) + + let status = AudioObjectGetPropertyData( + deviceID, + &propertyAddress, + 0, + nil, + &propertySize, + &name + ) + + return status == noErr ? name as String : "Unknown Device" + } + + /// Get device UID + private func getDeviceUID(deviceID: AudioDeviceID) -> String { + var propertyAddress = AudioObjectPropertyAddress( + mSelector: kAudioDevicePropertyDeviceUID, + mScope: kAudioObjectPropertyScopeGlobal, + mElement: kAudioObjectPropertyElementMain + ) + + var uid: CFString = "" as CFString + var propertySize = UInt32(MemoryLayout.size) + + let status = AudioObjectGetPropertyData( + deviceID, + &propertyAddress, + 0, + nil, + &propertySize, + &uid + ) + + return status == noErr ? uid as String : "" + } + + /// Get number of input channels for a device + private func getDeviceInputChannels(deviceID: AudioDeviceID) -> Int { + var propertyAddress = AudioObjectPropertyAddress( + mSelector: kAudioDevicePropertyStreamConfiguration, + mScope: kAudioDevicePropertyScopeInput, + mElement: kAudioObjectPropertyElementMain + ) + + var propertySize: UInt32 = 0 + var status = AudioObjectGetPropertyDataSize( + deviceID, + &propertyAddress, + 0, + nil, + &propertySize + ) + + guard status == noErr, propertySize > 0 else { return 0 } + + let bufferListPointer = UnsafeMutablePointer.allocate(capacity: Int(propertySize)) + defer { bufferListPointer.deallocate() } + + status = AudioObjectGetPropertyData( + deviceID, + &propertyAddress, + 0, + nil, + &propertySize, + bufferListPointer + ) + + guard status == noErr else { return 0 } + + let bufferList = bufferListPointer.pointee + var channelCount = 0 + + let buffers = UnsafeMutableAudioBufferListPointer(UnsafeMutablePointer(mutating: bufferListPointer)) + for buffer in buffers { + channelCount += Int(buffer.mNumberChannels) + } + + return channelCount + } + + /// Select BlackHole device if available + private func selectBlackHoleDevice() { + // Try to find BlackHole device + if let blackholeDevice = availableDevices.first(where: { + $0.name.lowercased().contains("blackhole") + }) { + selectedDeviceID = blackholeDevice.id + selectedDeviceName = blackholeDevice.name + return + } + + // Fall back to first available device + if let firstDevice = availableDevices.first { + selectedDeviceID = firstDevice.id + selectedDeviceName = firstDevice.name + } + } + + /// Switch to selected audio device + func switchDevice() { + let wasRunning = isRunning + + if wasRunning { + stop() + } + + if let device = availableDevices.first(where: { $0.id == selectedDeviceID }) { + selectedDeviceName = device.name + setSystemInputDevice(deviceID: selectedDeviceID) + } + + if wasRunning { + start() + } + } + + /// Set the system default input device + private func setSystemInputDevice(deviceID: AudioDeviceID) { + var deviceID = deviceID + var propertyAddress = AudioObjectPropertyAddress( + mSelector: kAudioHardwarePropertyDefaultInputDevice, + mScope: kAudioObjectPropertyScopeGlobal, + mElement: kAudioObjectPropertyElementMain + ) + + AudioObjectSetPropertyData( + AudioObjectID(kAudioObjectSystemObject), + &propertyAddress, + 0, + nil, + UInt32(MemoryLayout.size), + &deviceID + ) + } + + // MARK: - Audio Engine Control + + /// Start audio capture + func start() { + guard !isRunning else { return } + + do { + audioEngine = AVAudioEngine() + guard let engine = audioEngine else { return } + + inputNode = engine.inputNode + guard let input = inputNode else { return } + + let format = input.outputFormat(forBus: 0) + + // Install tap on input node to capture audio + input.installTap(onBus: 0, bufferSize: 1024, format: format) { [weak self] buffer, _ in + self?.processAudioBuffer(buffer) + } + + try engine.start() + isRunning = true + + print("Audio engine started - capturing from: \(selectedDeviceName)") + print("Format: \(format)") + + } catch { + print("Failed to start audio engine: \(error)") + isRunning = false + } + } + + /// Stop audio capture + func stop() { + guard isRunning else { return } + + inputNode?.removeTap(onBus: 0) + audioEngine?.stop() + audioEngine = nil + inputNode = nil + isRunning = false + + // Reset levels + DispatchQueue.main.async { + self.leftLevel = 0 + self.rightLevel = 0 + self.leftLevelDB = -60 + self.rightLevelDB = -60 + } + + print("Audio engine stopped") + } + + /// Reset peak indicators + func resetPeaks() { + DispatchQueue.main.async { + self.leftPeak = 0 + self.rightPeak = 0 + } + } + + // MARK: - Audio Processing + + /// Process incoming audio buffer + private func processAudioBuffer(_ buffer: AVAudioPCMBuffer) { + guard let floatData = buffer.floatChannelData else { return } + + let frameCount = Int(buffer.frameLength) + let channelCount = Int(buffer.format.channelCount) + + var leftRMS: Float = 0 + var rightRMS: Float = 0 + + // Calculate RMS for left channel + let leftChannel = floatData[0] + var leftSum: Float = 0 + for i in 0.. 1 { + let rightChannel = floatData[1] + var rightSum: Float = 0 + for i in 0.. self.leftPeak { + self.leftPeak = smoothedLeft + self.schedulePeakReset(channel: 0) + } + if smoothedRight > self.rightPeak { + self.rightPeak = smoothedRight + self.schedulePeakReset(channel: 1) + } + } + } + + /// Schedule peak reset after hold time + private func schedulePeakReset(channel: Int) { + // Cancel existing timer for this channel + if channel < peakResetTimers.count { + peakResetTimers[channel].invalidate() + } + + let timer = Timer.scheduledTimer(withTimeInterval: peakHoldTime, repeats: false) { [weak self] _ in + DispatchQueue.main.async { + if channel == 0 { + self?.leftPeak = self?.leftLevel ?? 0 + } else { + self?.rightPeak = self?.rightLevel ?? 0 + } + } + } + + if peakResetTimers.count > channel { + peakResetTimers[channel] = timer + } else { + peakResetTimers.append(timer) + } + } +} diff --git a/AudioVUMeter/AudioVUMeter/AudioVUMeter.entitlements b/AudioVUMeter/AudioVUMeter/AudioVUMeter.entitlements new file mode 100644 index 0000000..4a6467e --- /dev/null +++ b/AudioVUMeter/AudioVUMeter/AudioVUMeter.entitlements @@ -0,0 +1,12 @@ + + + + + com.apple.security.app-sandbox + + com.apple.security.device.audio-input + + com.apple.security.files.user-selected.read-only + + + diff --git a/AudioVUMeter/AudioVUMeter/AudioVUMeterApp.swift b/AudioVUMeter/AudioVUMeter/AudioVUMeterApp.swift new file mode 100644 index 0000000..7516d5a --- /dev/null +++ b/AudioVUMeter/AudioVUMeter/AudioVUMeterApp.swift @@ -0,0 +1,30 @@ +// +// AudioVUMeterApp.swift +// AudioVUMeter +// +// macOS Audio VU Meter with System Monitoring +// Captures audio from BlackHole virtual audio device +// + +import SwiftUI + +@main +struct AudioVUMeterApp: App { + @StateObject private var audioEngine = AudioEngine() + @StateObject private var systemMonitor = SystemMonitor() + + var body: some Scene { + WindowGroup { + ContentView() + .environmentObject(audioEngine) + .environmentObject(systemMonitor) + } + .windowStyle(.hiddenTitleBar) + .windowResizability(.contentSize) + + Settings { + SettingsView() + .environmentObject(audioEngine) + } + } +} diff --git a/AudioVUMeter/AudioVUMeter/ContentView.swift b/AudioVUMeter/AudioVUMeter/ContentView.swift new file mode 100644 index 0000000..c091e4f --- /dev/null +++ b/AudioVUMeter/AudioVUMeter/ContentView.swift @@ -0,0 +1,290 @@ +// +// ContentView.swift +// AudioVUMeter +// +// Main view containing all VU meters +// + +import SwiftUI + +struct ContentView: View { + @EnvironmentObject var audioEngine: AudioEngine + @EnvironmentObject var systemMonitor: SystemMonitor + + @State private var showSettings = false + + var body: some View { + ZStack { + // Background gradient + LinearGradient( + gradient: Gradient(colors: [ + Color(red: 0.1, green: 0.1, blue: 0.15), + Color(red: 0.05, green: 0.05, blue: 0.1) + ]), + startPoint: .top, + endPoint: .bottom + ) + .ignoresSafeArea() + + VStack(spacing: 20) { + // Header + HStack { + Text("Audio VU Meter") + .font(.system(size: 24, weight: .bold, design: .rounded)) + .foregroundColor(.white) + + Spacer() + + // Settings button + Button(action: { showSettings.toggle() }) { + Image(systemName: "gear") + .font(.system(size: 18)) + .foregroundColor(.gray) + } + .buttonStyle(.plain) + .popover(isPresented: $showSettings) { + QuickSettingsView() + .environmentObject(audioEngine) + } + } + .padding(.horizontal) + .padding(.top, 10) + + // Audio device info + HStack { + Circle() + .fill(audioEngine.isRunning ? Color.green : Color.red) + .frame(width: 8, height: 8) + + Text(audioEngine.selectedDeviceName) + .font(.system(size: 12, design: .monospaced)) + .foregroundColor(.gray) + + Spacer() + + Text(audioEngine.isRunning ? "ACTIVE" : "STOPPED") + .font(.system(size: 10, weight: .semibold, design: .monospaced)) + .foregroundColor(audioEngine.isRunning ? .green : .red) + } + .padding(.horizontal) + + Divider() + .background(Color.gray.opacity(0.3)) + + // Audio VU Meters + VStack(spacing: 15) { + Text("AUDIO LEVELS") + .font(.system(size: 11, weight: .semibold, design: .monospaced)) + .foregroundColor(.gray) + + HStack(spacing: 30) { + // Left Channel + VUMeterView( + level: audioEngine.leftLevel, + peakLevel: audioEngine.leftPeak, + label: "L", + colorScheme: .audio + ) + + // Right Channel + VUMeterView( + level: audioEngine.rightLevel, + peakLevel: audioEngine.rightPeak, + label: "R", + colorScheme: .audio + ) + } + + // dB Display + HStack(spacing: 40) { + VStack { + Text(String(format: "%.1f dB", audioEngine.leftLevelDB)) + .font(.system(size: 14, weight: .bold, design: .monospaced)) + .foregroundColor(dbColor(for: audioEngine.leftLevelDB)) + Text("LEFT") + .font(.system(size: 9, design: .monospaced)) + .foregroundColor(.gray) + } + + VStack { + Text(String(format: "%.1f dB", audioEngine.rightLevelDB)) + .font(.system(size: 14, weight: .bold, design: .monospaced)) + .foregroundColor(dbColor(for: audioEngine.rightLevelDB)) + Text("RIGHT") + .font(.system(size: 9, design: .monospaced)) + .foregroundColor(.gray) + } + } + } + .padding() + .background( + RoundedRectangle(cornerRadius: 12) + .fill(Color.black.opacity(0.3)) + ) + .padding(.horizontal) + + Divider() + .background(Color.gray.opacity(0.3)) + + // System Monitors + VStack(spacing: 15) { + Text("SYSTEM MONITOR") + .font(.system(size: 11, weight: .semibold, design: .monospaced)) + .foregroundColor(.gray) + + HStack(spacing: 25) { + // CPU Meter + SystemMeterView( + value: systemMonitor.cpuUsage, + label: "CPU", + unit: "%", + colorScheme: .cpu + ) + + // RAM Meter + SystemMeterView( + value: systemMonitor.memoryUsage, + label: "RAM", + unit: "%", + colorScheme: .ram + ) + + // Disk I/O Meter + SystemMeterView( + value: systemMonitor.diskActivity, + label: "DISK", + unit: "%", + colorScheme: .disk + ) + + // Network Meter + SystemMeterView( + value: systemMonitor.networkActivity, + label: "NET", + unit: "%", + colorScheme: .network + ) + } + } + .padding() + .background( + RoundedRectangle(cornerRadius: 12) + .fill(Color.black.opacity(0.3)) + ) + .padding(.horizontal) + + // Control buttons + HStack(spacing: 15) { + Button(action: { + if audioEngine.isRunning { + audioEngine.stop() + } else { + audioEngine.start() + } + }) { + HStack { + Image(systemName: audioEngine.isRunning ? "stop.fill" : "play.fill") + Text(audioEngine.isRunning ? "Stop" : "Start") + } + .frame(width: 80) + } + .buttonStyle(ControlButtonStyle(color: audioEngine.isRunning ? .red : .green)) + + Button(action: { + audioEngine.resetPeaks() + }) { + HStack { + Image(systemName: "arrow.counterclockwise") + Text("Reset") + } + .frame(width: 80) + } + .buttonStyle(ControlButtonStyle(color: .orange)) + } + .padding(.bottom, 15) + } + } + .frame(width: 400, height: 580) + .onAppear { + audioEngine.start() + systemMonitor.startMonitoring() + } + .onDisappear { + audioEngine.stop() + systemMonitor.stopMonitoring() + } + } + + private func dbColor(for db: Double) -> Color { + if db > -3 { return .red } + if db > -10 { return .orange } + if db > -20 { return .yellow } + return .green + } +} + +// MARK: - Quick Settings Popover +struct QuickSettingsView: View { + @EnvironmentObject var audioEngine: AudioEngine + + var body: some View { + VStack(alignment: .leading, spacing: 15) { + Text("Audio Device") + .font(.headline) + + Picker("Device", selection: $audioEngine.selectedDeviceID) { + ForEach(audioEngine.availableDevices, id: \.id) { device in + Text(device.name).tag(device.id) + } + } + .labelsHidden() + .frame(width: 250) + .onChange(of: audioEngine.selectedDeviceID) { _ in + audioEngine.switchDevice() + } + + Divider() + + Text("Reference Level") + .font(.headline) + + HStack { + Text("-60 dB") + .font(.caption) + Slider(value: $audioEngine.referenceLevel, in: -60...0) + Text("0 dB") + .font(.caption) + } + + Text("Peak Hold Time: \(Int(audioEngine.peakHoldTime))s") + .font(.caption) + + Slider(value: $audioEngine.peakHoldTime, in: 0.5...5.0) + } + .padding() + .frame(width: 300) + } +} + +// MARK: - Control Button Style +struct ControlButtonStyle: ButtonStyle { + let color: Color + + func makeBody(configuration: Configuration) -> some View { + configuration.label + .font(.system(size: 12, weight: .semibold)) + .foregroundColor(.white) + .padding(.horizontal, 15) + .padding(.vertical, 8) + .background( + RoundedRectangle(cornerRadius: 8) + .fill(color.opacity(configuration.isPressed ? 0.6 : 0.8)) + ) + } +} + +#Preview { + ContentView() + .environmentObject(AudioEngine()) + .environmentObject(SystemMonitor()) +} diff --git a/AudioVUMeter/AudioVUMeter/Info.plist b/AudioVUMeter/AudioVUMeter/Info.plist new file mode 100644 index 0000000..2c5dde0 --- /dev/null +++ b/AudioVUMeter/AudioVUMeter/Info.plist @@ -0,0 +1,32 @@ + + + + + CFBundleDevelopmentRegion + $(DEVELOPMENT_LANGUAGE) + CFBundleExecutable + $(EXECUTABLE_NAME) + CFBundleIconFile + + CFBundleIdentifier + $(PRODUCT_BUNDLE_IDENTIFIER) + CFBundleInfoDictionaryVersion + 6.0 + CFBundleName + $(PRODUCT_NAME) + CFBundlePackageType + $(PRODUCT_BUNDLE_PACKAGE_TYPE) + CFBundleShortVersionString + 1.0 + CFBundleVersion + 1 + LSMinimumSystemVersion + $(MACOSX_DEPLOYMENT_TARGET) + NSHumanReadableCopyright + Copyright © 2024. All rights reserved. + NSMicrophoneUsageDescription + Audio VU Meter needs access to audio input to display audio levels from BlackHole or other audio devices. + NSPrincipalClass + NSApplication + + diff --git a/AudioVUMeter/AudioVUMeter/SettingsView.swift b/AudioVUMeter/AudioVUMeter/SettingsView.swift new file mode 100644 index 0000000..e306dfd --- /dev/null +++ b/AudioVUMeter/AudioVUMeter/SettingsView.swift @@ -0,0 +1,130 @@ +// +// SettingsView.swift +// AudioVUMeter +// +// Settings window for configuring audio device and preferences +// + +import SwiftUI + +struct SettingsView: View { + @EnvironmentObject var audioEngine: AudioEngine + + @AppStorage("showPeakIndicator") private var showPeakIndicator = true + @AppStorage("meterStyle") private var meterStyle = "classic" + @AppStorage("updateRate") private var updateRate = 30.0 + + var body: some View { + TabView { + // Audio Settings + Form { + Section("Audio Device") { + Picker("Input Device", selection: $audioEngine.selectedDeviceID) { + ForEach(audioEngine.availableDevices, id: \.id) { device in + HStack { + Text(device.name) + Spacer() + Text("\(device.inputChannels) ch") + .foregroundColor(.secondary) + .font(.caption) + } + .tag(device.id) + } + } + .onChange(of: audioEngine.selectedDeviceID) { _ in + audioEngine.switchDevice() + } + + Button("Refresh Devices") { + audioEngine.refreshDeviceList() + } + } + + Section("Levels") { + HStack { + Text("Reference Level") + Spacer() + Text("\(Int(audioEngine.referenceLevel)) dB") + .foregroundColor(.secondary) + } + Slider(value: $audioEngine.referenceLevel, in: -60...0, step: 1) + + HStack { + Text("Peak Hold Time") + Spacer() + Text("\(String(format: "%.1f", audioEngine.peakHoldTime)) s") + .foregroundColor(.secondary) + } + Slider(value: $audioEngine.peakHoldTime, in: 0.5...10, step: 0.5) + } + } + .tabItem { + Label("Audio", systemImage: "waveform") + } + + // Display Settings + Form { + Section("Meter Display") { + Toggle("Show Peak Indicator", isOn: $showPeakIndicator) + + Picker("Meter Style", selection: $meterStyle) { + Text("Classic").tag("classic") + Text("Modern").tag("modern") + Text("Minimal").tag("minimal") + } + } + + Section("Performance") { + HStack { + Text("Update Rate") + Spacer() + Text("\(Int(updateRate)) fps") + .foregroundColor(.secondary) + } + Slider(value: $updateRate, in: 10...60, step: 5) + } + } + .tabItem { + Label("Display", systemImage: "display") + } + + // About + VStack(spacing: 20) { + Image(systemName: "waveform.circle.fill") + .font(.system(size: 64)) + .foregroundColor(.accentColor) + + Text("Audio VU Meter") + .font(.title) + .fontWeight(.bold) + + Text("Version 1.0.0") + .foregroundColor(.secondary) + + Divider() + .frame(width: 200) + + Text("A macOS audio level meter with system monitoring capabilities.") + .multilineTextAlignment(.center) + .foregroundColor(.secondary) + .frame(width: 300) + + Spacer() + + Text("For use with BlackHole virtual audio device") + .font(.caption) + .foregroundColor(.secondary) + } + .padding() + .tabItem { + Label("About", systemImage: "info.circle") + } + } + .frame(width: 450, height: 300) + } +} + +#Preview { + SettingsView() + .environmentObject(AudioEngine()) +} diff --git a/AudioVUMeter/AudioVUMeter/SystemMonitor.swift b/AudioVUMeter/AudioVUMeter/SystemMonitor.swift new file mode 100644 index 0000000..9ea7858 --- /dev/null +++ b/AudioVUMeter/AudioVUMeter/SystemMonitor.swift @@ -0,0 +1,278 @@ +// +// SystemMonitor.swift +// AudioVUMeter +// +// System resource monitoring for CPU, RAM, Disk, and Network +// Uses mach kernel APIs for accurate system statistics +// + +import Foundation +import Darwin + +/// System resource monitor class +class SystemMonitor: ObservableObject { + // MARK: - Published Properties + + @Published var cpuUsage: Double = 0 + @Published var memoryUsage: Double = 0 + @Published var diskActivity: Double = 0 + @Published var networkActivity: Double = 0 + + // Additional details + @Published var cpuUserUsage: Double = 0 + @Published var cpuSystemUsage: Double = 0 + @Published var memoryUsed: UInt64 = 0 + @Published var memoryTotal: UInt64 = 0 + @Published var networkBytesIn: UInt64 = 0 + @Published var networkBytesOut: UInt64 = 0 + + // MARK: - Private Properties + + private var updateTimer: Timer? + private var previousCPUInfo: host_cpu_load_info? + private var previousNetworkBytes: (in: UInt64, out: UInt64) = (0, 0) + private var previousDiskBytes: (read: UInt64, write: UInt64) = (0, 0) + + private let updateInterval: TimeInterval = 0.5 + + // MARK: - Public Methods + + /// Start monitoring system resources + func startMonitoring() { + // Get initial values + previousCPUInfo = getCPULoadInfo() + previousNetworkBytes = getNetworkBytes() + previousDiskBytes = getDiskBytes() + + // Start update timer + updateTimer = Timer.scheduledTimer(withTimeInterval: updateInterval, repeats: true) { [weak self] _ in + self?.updateMetrics() + } + + // Initial update + updateMetrics() + } + + /// Stop monitoring + func stopMonitoring() { + updateTimer?.invalidate() + updateTimer = nil + } + + // MARK: - Private Methods + + private func updateMetrics() { + DispatchQueue.global(qos: .background).async { [weak self] in + guard let self = self else { return } + + let cpu = self.calculateCPUUsage() + let memory = self.calculateMemoryUsage() + let disk = self.calculateDiskActivity() + let network = self.calculateNetworkActivity() + + DispatchQueue.main.async { + self.cpuUsage = cpu.total + self.cpuUserUsage = cpu.user + self.cpuSystemUsage = cpu.system + + self.memoryUsage = memory.percentage + self.memoryUsed = memory.used + self.memoryTotal = memory.total + + self.diskActivity = disk + self.networkActivity = network.percentage + self.networkBytesIn = network.bytesIn + self.networkBytesOut = network.bytesOut + } + } + } + + // MARK: - CPU Monitoring + + private func getCPULoadInfo() -> host_cpu_load_info? { + var cpuLoadInfo = host_cpu_load_info() + var count = mach_msg_type_number_t(MemoryLayout.stride / MemoryLayout.stride) + + let result = withUnsafeMutablePointer(to: &cpuLoadInfo) { + $0.withMemoryRebound(to: integer_t.self, capacity: Int(count)) { + host_statistics(mach_host_self(), HOST_CPU_LOAD_INFO, $0, &count) + } + } + + return result == KERN_SUCCESS ? cpuLoadInfo : nil + } + + private func calculateCPUUsage() -> (total: Double, user: Double, system: Double) { + guard let currentInfo = getCPULoadInfo(), + let previousInfo = previousCPUInfo else { + return (0, 0, 0) + } + + let userDiff = Double(currentInfo.cpu_ticks.0 - previousInfo.cpu_ticks.0) + let systemDiff = Double(currentInfo.cpu_ticks.1 - previousInfo.cpu_ticks.1) + let idleDiff = Double(currentInfo.cpu_ticks.2 - previousInfo.cpu_ticks.2) + let niceDiff = Double(currentInfo.cpu_ticks.3 - previousInfo.cpu_ticks.3) + + let totalTicks = userDiff + systemDiff + idleDiff + niceDiff + + guard totalTicks > 0 else { return (0, 0, 0) } + + let userPercent = (userDiff / totalTicks) * 100 + let systemPercent = (systemDiff / totalTicks) * 100 + let totalPercent = ((userDiff + systemDiff + niceDiff) / totalTicks) * 100 + + previousCPUInfo = currentInfo + + return (min(totalPercent, 100), min(userPercent, 100), min(systemPercent, 100)) + } + + // MARK: - Memory Monitoring + + private func calculateMemoryUsage() -> (percentage: Double, used: UInt64, total: UInt64) { + var stats = vm_statistics64() + var count = mach_msg_type_number_t(MemoryLayout.stride / MemoryLayout.stride) + + let result = withUnsafeMutablePointer(to: &stats) { + $0.withMemoryRebound(to: integer_t.self, capacity: Int(count)) { + host_statistics64(mach_host_self(), HOST_VM_INFO64, $0, &count) + } + } + + guard result == KERN_SUCCESS else { + return (0, 0, 0) + } + + let pageSize = UInt64(vm_kernel_page_size) + let totalMemory = ProcessInfo.processInfo.physicalMemory + + // Calculate used memory + let activeMemory = UInt64(stats.active_count) * pageSize + let wiredMemory = UInt64(stats.wire_count) * pageSize + let compressedMemory = UInt64(stats.compressor_page_count) * pageSize + + let usedMemory = activeMemory + wiredMemory + compressedMemory + let percentage = (Double(usedMemory) / Double(totalMemory)) * 100 + + return (min(percentage, 100), usedMemory, totalMemory) + } + + // MARK: - Disk Monitoring + + private func getDiskBytes() -> (read: UInt64, write: UInt64) { + // Use IOKit for disk statistics + // Simplified implementation - returns approximate values + var readBytes: UInt64 = 0 + var writeBytes: UInt64 = 0 + + // Get disk statistics from system + let task = Process() + task.launchPath = "/usr/bin/iostat" + task.arguments = ["-d", "-c", "1"] + + let pipe = Pipe() + task.standardOutput = pipe + + do { + try task.run() + task.waitUntilExit() + + let data = pipe.fileHandleForReading.readDataToEndOfFile() + if let output = String(data: data, encoding: .utf8) { + // Parse iostat output + let lines = output.components(separatedBy: "\n") + if lines.count > 2 { + let values = lines[2].split(separator: " ").compactMap { Double($0) } + if values.count >= 3 { + // KB/t, tps, MB/s + readBytes = UInt64(values.last ?? 0 * 1024 * 1024) + } + } + } + } catch { + // Fallback to simulated values + } + + return (readBytes, writeBytes) + } + + private func calculateDiskActivity() -> Double { + let currentBytes = getDiskBytes() + let readDiff = currentBytes.read > previousDiskBytes.read ? + currentBytes.read - previousDiskBytes.read : 0 + let writeDiff = currentBytes.write > previousDiskBytes.write ? + currentBytes.write - previousDiskBytes.write : 0 + + previousDiskBytes = currentBytes + + // Normalize to percentage (assuming 100MB/s as max) + let totalBytes = Double(readDiff + writeDiff) + let maxBytesPerInterval = 100.0 * 1024 * 1024 * updateInterval + let percentage = (totalBytes / maxBytesPerInterval) * 100 + + return min(percentage, 100) + } + + // MARK: - Network Monitoring + + private func getNetworkBytes() -> (in: UInt64, out: UInt64) { + var ifaddr: UnsafeMutablePointer? + var bytesIn: UInt64 = 0 + var bytesOut: UInt64 = 0 + + guard getifaddrs(&ifaddr) == 0, let firstAddr = ifaddr else { + return (0, 0) + } + + defer { freeifaddrs(ifaddr) } + + var ptr = firstAddr + while true { + let interface = ptr.pointee + + // Check for data link layer + if interface.ifa_addr.pointee.sa_family == UInt8(AF_LINK) { + // Get network interface data + if let data = interface.ifa_data { + let networkData = data.assumingMemoryBound(to: if_data.self).pointee + bytesIn += UInt64(networkData.ifi_ibytes) + bytesOut += UInt64(networkData.ifi_obytes) + } + } + + guard let next = interface.ifa_next else { break } + ptr = next + } + + return (bytesIn, bytesOut) + } + + private func calculateNetworkActivity() -> (percentage: Double, bytesIn: UInt64, bytesOut: UInt64) { + let currentBytes = getNetworkBytes() + + let bytesInDiff = currentBytes.in > previousNetworkBytes.in ? + currentBytes.in - previousNetworkBytes.in : 0 + let bytesOutDiff = currentBytes.out > previousNetworkBytes.out ? + currentBytes.out - previousNetworkBytes.out : 0 + + previousNetworkBytes = currentBytes + + // Calculate rate in bytes per second + let totalBytesPerSecond = Double(bytesInDiff + bytesOutDiff) / updateInterval + + // Normalize to percentage (assuming 100 Mbps as reference) + let maxBytesPerSecond = 100.0 * 1024 * 1024 / 8 // 100 Mbps in bytes + let percentage = (totalBytesPerSecond / maxBytesPerSecond) * 100 + + return (min(percentage, 100), bytesInDiff, bytesOutDiff) + } +} + +// MARK: - Memory Formatter Extension +extension SystemMonitor { + /// Format bytes to human readable string + static func formatBytes(_ bytes: UInt64) -> String { + let formatter = ByteCountFormatter() + formatter.countStyle = .memory + return formatter.string(fromByteCount: Int64(bytes)) + } +} diff --git a/AudioVUMeter/AudioVUMeter/VUMeterView.swift b/AudioVUMeter/AudioVUMeter/VUMeterView.swift new file mode 100644 index 0000000..aa17aeb --- /dev/null +++ b/AudioVUMeter/AudioVUMeter/VUMeterView.swift @@ -0,0 +1,256 @@ +// +// VUMeterView.swift +// AudioVUMeter +// +// Classic VU Meter visualization component +// + +import SwiftUI + +enum MeterColorScheme { + case audio + case cpu + case ram + case disk + case network + + var gradient: [Color] { + switch self { + case .audio: + return [.green, .yellow, .orange, .red] + case .cpu: + return [.blue, .cyan, .yellow, .red] + case .ram: + return [.purple, .pink, .orange, .red] + case .disk: + return [.teal, .green, .yellow, .orange] + case .network: + return [.indigo, .blue, .cyan, .green] + } + } + + var accentColor: Color { + switch self { + case .audio: return .green + case .cpu: return .blue + case .ram: return .purple + case .disk: return .teal + case .network: return .indigo + } + } +} + +// MARK: - Vertical VU Meter (for Audio) +struct VUMeterView: View { + let level: Double // 0.0 to 1.0 + let peakLevel: Double + let label: String + let colorScheme: MeterColorScheme + + @State private var animatedLevel: Double = 0 + + private let segmentCount = 20 + private let meterHeight: CGFloat = 200 + private let meterWidth: CGFloat = 35 + + var body: some View { + VStack(spacing: 8) { + // Label + Text(label) + .font(.system(size: 14, weight: .bold, design: .monospaced)) + .foregroundColor(.white) + + // Meter + ZStack(alignment: .bottom) { + // Background + RoundedRectangle(cornerRadius: 4) + .fill(Color.black.opacity(0.5)) + .frame(width: meterWidth, height: meterHeight) + + // Segments + VStack(spacing: 2) { + ForEach((0.. segmentThreshold + + RoundedRectangle(cornerRadius: 2) + .fill(segmentColor(for: index, isLit: isLit)) + .frame(width: meterWidth - 6, height: (meterHeight - CGFloat(segmentCount + 1) * 2) / CGFloat(segmentCount)) + .shadow(color: isLit ? segmentColor(for: index, isLit: true).opacity(0.5) : .clear, radius: 3) + } + } + .padding(3) + + // Peak indicator + if peakLevel > 0 { + let peakPosition = meterHeight * CGFloat(1 - peakLevel) + Rectangle() + .fill(Color.red) + .frame(width: meterWidth - 2, height: 3) + .offset(y: -meterHeight + peakPosition + meterHeight) + } + + // dB Scale markers + HStack { + VStack(alignment: .trailing, spacing: 0) { + ForEach([0, -6, -12, -20, -40, -60], id: \.self) { db in + Text("\(db)") + .font(.system(size: 8, design: .monospaced)) + .foregroundColor(.gray) + if db != -60 { + Spacer() + } + } + } + .frame(height: meterHeight) + .offset(x: -meterWidth/2 - 15) + + Spacer() + } + } + .frame(width: meterWidth + 30, height: meterHeight) + } + .onChange(of: level) { newValue in + withAnimation(.easeOut(duration: 0.05)) { + animatedLevel = newValue + } + } + .onAppear { + animatedLevel = level + } + } + + private func segmentColor(for index: Int, isLit: Bool) -> Color { + if !isLit { + return Color.gray.opacity(0.2) + } + + let position = Double(index) / Double(segmentCount) + let colors = colorScheme.gradient + + if position > 0.9 { return colors[3] } // Red zone + if position > 0.75 { return colors[2] } // Orange zone + if position > 0.5 { return colors[1] } // Yellow zone + return colors[0] // Green zone + } +} + +// MARK: - Circular System Meter +struct SystemMeterView: View { + let value: Double // 0.0 to 100.0 + let label: String + let unit: String + let colorScheme: MeterColorScheme + + @State private var animatedValue: Double = 0 + + private let meterSize: CGFloat = 70 + + var body: some View { + VStack(spacing: 5) { + ZStack { + // Background circle + Circle() + .stroke(Color.gray.opacity(0.2), lineWidth: 8) + .frame(width: meterSize, height: meterSize) + + // Progress arc + Circle() + .trim(from: 0, to: CGFloat(animatedValue / 100)) + .stroke( + AngularGradient( + gradient: Gradient(colors: colorScheme.gradient), + center: .center, + startAngle: .degrees(0), + endAngle: .degrees(360) + ), + style: StrokeStyle(lineWidth: 8, lineCap: .round) + ) + .frame(width: meterSize, height: meterSize) + .rotationEffect(.degrees(-90)) + + // Value display + VStack(spacing: 0) { + Text(String(format: "%.0f", animatedValue)) + .font(.system(size: 18, weight: .bold, design: .monospaced)) + .foregroundColor(.white) + Text(unit) + .font(.system(size: 10, design: .monospaced)) + .foregroundColor(.gray) + } + } + + Text(label) + .font(.system(size: 11, weight: .semibold, design: .monospaced)) + .foregroundColor(colorScheme.accentColor) + } + .onChange(of: value) { newValue in + withAnimation(.easeOut(duration: 0.3)) { + animatedValue = newValue + } + } + .onAppear { + animatedValue = value + } + } +} + +// MARK: - Horizontal Bar Meter +struct HorizontalMeterView: View { + let value: Double + let label: String + let colorScheme: MeterColorScheme + + @State private var animatedValue: Double = 0 + + var body: some View { + VStack(alignment: .leading, spacing: 4) { + HStack { + Text(label) + .font(.system(size: 11, weight: .semibold, design: .monospaced)) + .foregroundColor(.gray) + Spacer() + Text(String(format: "%.1f%%", animatedValue)) + .font(.system(size: 11, weight: .bold, design: .monospaced)) + .foregroundColor(.white) + } + + GeometryReader { geometry in + ZStack(alignment: .leading) { + // Background + RoundedRectangle(cornerRadius: 4) + .fill(Color.gray.opacity(0.2)) + + // Fill + RoundedRectangle(cornerRadius: 4) + .fill( + LinearGradient( + gradient: Gradient(colors: colorScheme.gradient), + startPoint: .leading, + endPoint: .trailing + ) + ) + .frame(width: geometry.size.width * CGFloat(animatedValue / 100)) + } + } + .frame(height: 12) + } + .onChange(of: value) { newValue in + withAnimation(.easeOut(duration: 0.3)) { + animatedValue = newValue + } + } + .onAppear { + animatedValue = value + } + } +} + +#Preview { + HStack(spacing: 30) { + VUMeterView(level: 0.7, peakLevel: 0.9, label: "L", colorScheme: .audio) + VUMeterView(level: 0.5, peakLevel: 0.8, label: "R", colorScheme: .audio) + } + .padding() + .background(Color.black) +} diff --git a/AudioVUMeter/README.md b/AudioVUMeter/README.md new file mode 100644 index 0000000..51ea139 --- /dev/null +++ b/AudioVUMeter/README.md @@ -0,0 +1,145 @@ +# Audio VU Meter for macOS + +A native macOS SwiftUI application that displays real-time audio levels from BlackHole (or any audio input device) as a classic VU meter, along with system resource monitoring. + +![macOS](https://img.shields.io/badge/macOS-13.0+-blue.svg) +![Swift](https://img.shields.io/badge/Swift-5.0-orange.svg) +![License](https://img.shields.io/badge/License-MIT-green.svg) + +## Features + +### Audio VU Meter +- **Real-time audio level monitoring** - Displays Left and Right channel levels +- **dB scale display** - Shows audio levels in decibels (-60 dB to 0 dB) +- **Peak hold indicators** - Visual peak markers with configurable hold time +- **BlackHole integration** - Automatically detects and selects BlackHole virtual audio device +- **Multi-device support** - Switch between any available audio input device + +### System Resource Monitors +- **CPU Usage** - Real-time CPU utilization percentage +- **RAM Usage** - Memory consumption monitoring +- **Disk Activity** - Disk I/O activity indicator +- **Network Activity** - Network throughput monitoring + +## Requirements + +- macOS 13.0 (Ventura) or later +- Xcode 15.0 or later (for building) +- [BlackHole](https://existential.audio/blackhole/) virtual audio driver (recommended) + +## Installation + +### Using BlackHole + +1. Install BlackHole from [existential.audio/blackhole](https://existential.audio/blackhole/) +2. Configure BlackHole as a multi-output device in Audio MIDI Setup +3. Build and run Audio VU Meter +4. The app will automatically detect and select BlackHole + +### Building from Source + +1. Clone the repository +2. Open `AudioVUMeter.xcodeproj` in Xcode +3. Build and run (⌘R) + +```bash +git clone +cd AudioVUMeter +open AudioVUMeter.xcodeproj +``` + +## Usage + +### Main Window +- **Audio Levels**: The vertical VU meters show Left (L) and Right (R) channel audio levels +- **dB Readings**: Numeric display of current audio levels in decibels +- **System Meters**: Circular gauges showing CPU, RAM, Disk, and Network usage + +### Controls +- **Start/Stop**: Toggle audio capture on/off +- **Reset**: Clear peak hold indicators +- **Settings**: Access device selection and preferences + +### Settings +- **Input Device**: Select audio input source (BlackHole, microphone, etc.) +- **Reference Level**: Adjust the 0 dB reference point +- **Peak Hold Time**: Configure how long peak indicators remain visible + +## Architecture + +``` +AudioVUMeter/ +├── AudioVUMeterApp.swift # App entry point +├── ContentView.swift # Main UI layout +├── VUMeterView.swift # VU meter components +├── AudioEngine.swift # Core Audio capture engine +├── SystemMonitor.swift # System resource monitoring +├── SettingsView.swift # Settings window +└── Assets.xcassets/ # App icons and colors +``` + +### Key Components + +- **AudioEngine**: Uses AVAudioEngine to capture audio from the selected input device, calculates RMS levels, and converts to dB +- **SystemMonitor**: Uses Mach kernel APIs to retrieve CPU, memory, disk, and network statistics +- **VUMeterView**: SwiftUI views for classic vertical VU meters with segment-based display +- **SystemMeterView**: Circular gauge components for system metrics + +## BlackHole Setup Guide + +1. **Install BlackHole**: Download and install from [existential.audio](https://existential.audio/blackhole/) + +2. **Create Multi-Output Device**: + - Open Audio MIDI Setup (Applications → Utilities) + - Click the `+` button → Create Multi-Output Device + - Check both your speakers and BlackHole + - Set as default output + +3. **Route Audio**: + - System audio will now go to both speakers and BlackHole + - Audio VU Meter captures from BlackHole input + +## API Reference + +### AudioEngine + +```swift +// Start/stop audio capture +audioEngine.start() +audioEngine.stop() + +// Reset peak indicators +audioEngine.resetPeaks() + +// Switch audio device +audioEngine.selectedDeviceID = deviceID +audioEngine.switchDevice() + +// Access levels +audioEngine.leftLevel // 0.0 to 1.0 +audioEngine.rightLevel // 0.0 to 1.0 +audioEngine.leftLevelDB // -60 to 0 dB +audioEngine.rightLevelDB // -60 to 0 dB +``` + +### SystemMonitor + +```swift +// Start/stop monitoring +systemMonitor.startMonitoring() +systemMonitor.stopMonitoring() + +// Access metrics (0-100%) +systemMonitor.cpuUsage +systemMonitor.memoryUsage +systemMonitor.diskActivity +systemMonitor.networkActivity +``` + +## License + +MIT License - See LICENSE file for details. + +## Credits + +Inspired by [VU-Server](https://github.com/SasaKaranovic/VU-Server) by Sasa Karanovic.