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4 Commits

Author SHA1 Message Date
Claude f5e266b22b Add USB auto-probing to detect VU meter hardware
Features:
- Auto-probe scans all USB serial ports to find VU meter
- Tests multiple baud rates (115200, 9600, 57600, 38400, 19200)
- Tests all protocols (Raw, Text, JSON, VU-Server)
- Detects response from hardware to confirm connection
- Known USB device detection (CH340, CP210x, FTDI, Arduino, etc.)
- USB Vendor/Product ID display in port selection
- Quick Connect button for instant auto-connection
- Progress bar and status during probing
- Probe results display for debugging

USB detection:
- Reads USB idVendor/idProduct from IOKit registry
- Marks known VU meter devices with star icon
- Auto-selects detected VU meter port
2025-12-14 10:41:27 +00:00
Claude 52fa522d6d Add physical VU meter hardware support (4 dials)
New features:
- SerialManager for USB/Serial communication with hardware
- Support for 4 physical VU meter dials
- Flexible channel mapping: Audio L/R, Peak, Mono, CPU, RAM, Disk, Network
- Multiple protocols: Raw bytes, Text, JSON, VU-Server compatible
- Per-dial configuration: min/max values, inversion, smoothing
- Hardware panel in main view showing dial status
- Hardware settings sheet for configuration
- Auto-detection of USB serial devices

Protocol formats:
- Raw: [0xAA][D1][D2][D3][D4][0x55]
- Text: CH1:val;CH2:val;CH3:val;CH4:val\n
- JSON: {"dials":[d1,d2,d3,d4]}
- VU-Server: #0:val\n#1:val\n...
2025-12-14 10:15:20 +00:00
Claude 2ad21cad58 Add macOS Audio VU Meter app with system monitoring
Features:
- Real-time audio level monitoring via BlackHole virtual audio device
- Classic VU meter display with dB scale (-60 to 0 dB)
- Peak hold indicators with configurable hold time
- System resource monitors: CPU, RAM, Disk, Network
- SwiftUI interface with dark theme
- Multi-device audio input selection
- Settings window for configuration

Built with AVAudioEngine for audio capture and Mach kernel APIs
for system statistics.
2025-12-14 10:03:56 +00:00
admin dd1d45d3e0 Merge pull request #3 from metacube2/claude/twelve-tone-synthesizer-01BgdmRVwhTdP8FRvAbntAqo
Build twelve-tone synthesizer with reverb in PHP
2025-12-13 17:29:21 +01:00
15 changed files with 3507 additions and 0 deletions
@@ -0,0 +1,362 @@
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View File
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//
// 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<AudioDeviceID>.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<CFString>.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<CFString>.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<AudioBufferList>.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<AudioDeviceID>.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..<frameCount {
let sample = leftChannel[i]
leftSum += sample * sample
}
leftRMS = sqrt(leftSum / Float(frameCount))
// Calculate RMS for right channel (or use left if mono)
if channelCount > 1 {
let rightChannel = floatData[1]
var rightSum: Float = 0
for i in 0..<frameCount {
let sample = rightChannel[i]
rightSum += sample * sample
}
rightRMS = sqrt(rightSum / Float(frameCount))
} else {
rightRMS = leftRMS
}
// Convert to dB
let leftDB = 20 * log10(max(leftRMS, 1e-10))
let rightDB = 20 * log10(max(rightRMS, 1e-10))
// Normalize to 0-1 range (assuming -60dB is silence)
let minDB: Float = -60
let maxDB: Float = 0
let normalizedLeft = Double(max(0, min(1, (leftDB - minDB) / (maxDB - minDB))))
let normalizedRight = Double(max(0, min(1, (rightDB - minDB) / (maxDB - minDB))))
// Apply smoothing
let smoothedLeft = previousLeftLevel * (1 - levelSmoothingFactor) + normalizedLeft * levelSmoothingFactor
let smoothedRight = previousRightLevel * (1 - levelSmoothingFactor) + normalizedRight * levelSmoothingFactor
previousLeftLevel = smoothedLeft
previousRightLevel = smoothedRight
// Update UI on main thread
DispatchQueue.main.async {
self.leftLevel = smoothedLeft
self.rightLevel = smoothedRight
self.leftLevelDB = Double(leftDB)
self.rightLevelDB = Double(rightDB)
// Update peaks
if smoothedLeft > 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)
}
}
}
@@ -0,0 +1,12 @@
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>com.apple.security.app-sandbox</key>
<true/>
<key>com.apple.security.device.audio-input</key>
<true/>
<key>com.apple.security.files.user-selected.read-only</key>
<true/>
</dict>
</plist>
@@ -0,0 +1,54 @@
//
// AudioVUMeterApp.swift
// AudioVUMeter
//
// macOS Audio VU Meter with System Monitoring
// Captures audio from BlackHole virtual audio device
// Outputs to physical VU meter hardware via Serial/USB
//
import SwiftUI
@main
struct AudioVUMeterApp: App {
@StateObject private var audioEngine = AudioEngine()
@StateObject private var systemMonitor = SystemMonitor()
@StateObject private var serialManager = SerialManager()
// Timer for updating hardware values
@State private var updateTimer: Timer?
var body: some Scene {
WindowGroup {
ContentView()
.environmentObject(audioEngine)
.environmentObject(systemMonitor)
.environmentObject(serialManager)
.onAppear {
startHardwareUpdateTimer()
}
.onDisappear {
stopHardwareUpdateTimer()
}
}
.windowStyle(.hiddenTitleBar)
.windowResizability(.contentSize)
Settings {
SettingsView()
.environmentObject(audioEngine)
.environmentObject(serialManager)
}
}
private func startHardwareUpdateTimer() {
updateTimer = Timer.scheduledTimer(withTimeInterval: 1.0/30.0, repeats: true) { _ in
serialManager.updateValues(audioEngine: audioEngine, systemMonitor: systemMonitor)
}
}
private func stopHardwareUpdateTimer() {
updateTimer?.invalidate()
updateTimer = nil
}
}
+343
View File
@@ -0,0 +1,343 @@
//
// ContentView.swift
// AudioVUMeter
//
// Main view containing all VU meters and hardware output
//
import SwiftUI
struct ContentView: View {
@EnvironmentObject var audioEngine: AudioEngine
@EnvironmentObject var systemMonitor: SystemMonitor
@EnvironmentObject var serialManager: SerialManager
@State private var showSettings = false
@State private var showHardwareSettings = 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()
ScrollView {
VStack(spacing: 16) {
// Header
HStack {
Text("Audio VU Meter")
.font(.system(size: 24, weight: .bold, design: .rounded))
.foregroundColor(.white)
Spacer()
// Hardware settings button
Button(action: { showHardwareSettings.toggle() }) {
Image(systemName: "cable.connector")
.font(.system(size: 16))
.foregroundColor(serialManager.isConnected ? .green : .gray)
}
.buttonStyle(.plain)
.help("Hardware Settings")
// 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)
Divider()
.background(Color.gray.opacity(0.3))
// Hardware Output Panel
HardwarePanelView()
.environmentObject(serialManager)
// 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: 750)
.sheet(isPresented: $showHardwareSettings) {
HardwareSettingsSheet()
.environmentObject(serialManager)
}
.onAppear {
audioEngine.start()
systemMonitor.startMonitoring()
}
.onDisappear {
audioEngine.stop()
systemMonitor.stopMonitoring()
serialManager.disconnect()
}
}
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: - Hardware Settings Sheet
struct HardwareSettingsSheet: View {
@EnvironmentObject var serialManager: SerialManager
@Environment(\.dismiss) var dismiss
var body: some View {
VStack(spacing: 0) {
// Header
HStack {
Text("Hardware Configuration")
.font(.headline)
Spacer()
Button("Done") { dismiss() }
}
.padding()
.background(Color(nsColor: .windowBackgroundColor))
Divider()
// Settings content
HardwareSettingsView()
.environmentObject(serialManager)
}
.frame(width: 500, height: 600)
}
}
// 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())
.environmentObject(SerialManager())
}
@@ -0,0 +1,524 @@
//
// HardwareView.swift
// AudioVUMeter
//
// Hardware configuration and monitoring view for physical VU meters
// Includes auto-probe functionality to detect connected hardware
//
import SwiftUI
// MARK: - Hardware Panel in Main View
struct HardwarePanelView: View {
@EnvironmentObject var serialManager: SerialManager
var body: some View {
VStack(spacing: 15) {
// Header
HStack {
Text("HARDWARE OUTPUT")
.font(.system(size: 11, weight: .semibold, design: .monospaced))
.foregroundColor(.gray)
Spacer()
// Connection status
HStack(spacing: 6) {
Circle()
.fill(statusColor)
.frame(width: 8, height: 8)
Text(statusText)
.font(.system(size: 9, weight: .semibold, design: .monospaced))
.foregroundColor(statusColor)
}
}
// Probing progress
if serialManager.isProbing {
VStack(spacing: 8) {
ProgressView(value: serialManager.probeProgress)
.progressViewStyle(.linear)
Text(serialManager.probeStatus)
.font(.system(size: 10, design: .monospaced))
.foregroundColor(.orange)
}
} else {
// 4 Physical Dial Indicators
HStack(spacing: 15) {
ForEach(0..<4) { index in
DialIndicatorView(
dialNumber: index + 1,
value: serialManager.dialValues[index],
channelName: shortChannelName(serialManager.dialConfigs[index].dialChannel),
isConnected: serialManager.isConnected
)
}
}
}
// Buttons
HStack(spacing: 10) {
// Auto-probe button
Button(action: {
if serialManager.isProbing {
serialManager.stopAutoProbe()
} else {
serialManager.startAutoProbe()
}
}) {
HStack {
Image(systemName: serialManager.isProbing ? "stop.fill" : "magnifyingglass")
Text(serialManager.isProbing ? "Stop" : "Auto-Find")
}
.frame(maxWidth: .infinity)
}
.buttonStyle(ProbeButtonStyle(isProbing: serialManager.isProbing))
.disabled(serialManager.isConnected)
// Connect button
Button(action: {
serialManager.toggleConnection()
}) {
HStack {
Image(systemName: serialManager.isConnected ? "antenna.radiowaves.left.and.right.slash" : "antenna.radiowaves.left.and.right")
Text(serialManager.isConnected ? "Disconnect" : "Connect")
}
.frame(maxWidth: .infinity)
}
.buttonStyle(HardwareButtonStyle(isConnected: serialManager.isConnected))
.disabled(serialManager.isProbing)
}
// Stats / Device info
if serialManager.isConnected {
HStack {
Text("TX: \(formatBytes(serialManager.bytesSent))")
.font(.system(size: 9, design: .monospaced))
.foregroundColor(.gray)
Spacer()
Text(serialManager.selectedPortPath.components(separatedBy: "/").last ?? "")
.font(.system(size: 9, design: .monospaced))
.foregroundColor(.gray)
}
} else if let detected = serialManager.detectedDevice {
HStack {
Image(systemName: "checkmark.circle.fill")
.foregroundColor(.green)
.font(.system(size: 10))
Text("Found: \(detected.name)")
.font(.system(size: 9, design: .monospaced))
.foregroundColor(.green)
Spacer()
if let vid = detected.vendorID, let pid = detected.productID {
Text(String(format: "%04X:%04X", vid, pid))
.font(.system(size: 8, design: .monospaced))
.foregroundColor(.gray)
}
}
}
}
.padding()
.background(
RoundedRectangle(cornerRadius: 12)
.fill(Color.black.opacity(0.3))
.overlay(
RoundedRectangle(cornerRadius: 12)
.stroke(borderColor, lineWidth: 1)
)
)
.padding(.horizontal)
}
private var statusColor: Color {
if serialManager.isProbing { return .orange }
if serialManager.isConnected { return .green }
return .red
}
private var statusText: String {
if serialManager.isProbing { return "PROBING" }
if serialManager.isConnected { return "CONNECTED" }
return "DISCONNECTED"
}
private var borderColor: Color {
if serialManager.isProbing { return .orange.opacity(0.3) }
if serialManager.isConnected { return .green.opacity(0.3) }
return .clear
}
private func shortChannelName(_ channel: DialChannel) -> String {
switch channel {
case .audioLeft: return "L"
case .audioRight: return "R"
case .audioPeak: return "PK"
case .audioMono: return "M"
case .cpu: return "CPU"
case .ram: return "RAM"
case .disk: return "DSK"
case .network: return "NET"
}
}
private func formatBytes(_ bytes: UInt64) -> String {
if bytes < 1024 { return "\(bytes) B" }
if bytes < 1024 * 1024 { return String(format: "%.1f KB", Double(bytes) / 1024) }
return String(format: "%.1f MB", Double(bytes) / (1024 * 1024))
}
}
// MARK: - Single Dial Indicator
struct DialIndicatorView: View {
let dialNumber: Int
let value: Int
let channelName: String
let isConnected: Bool
var body: some View {
VStack(spacing: 4) {
// Dial number
Text("D\(dialNumber)")
.font(.system(size: 10, weight: .bold, design: .monospaced))
.foregroundColor(.white.opacity(0.7))
// Value arc
ZStack {
// Background arc
Circle()
.trim(from: 0.25, to: 0.75)
.stroke(Color.gray.opacity(0.2), lineWidth: 4)
.frame(width: 50, height: 50)
.rotationEffect(.degrees(180))
// Value arc
Circle()
.trim(from: 0.25, to: 0.25 + (Double(value) / 255.0) * 0.5)
.stroke(
isConnected ? dialColor(for: value) : Color.gray,
style: StrokeStyle(lineWidth: 4, lineCap: .round)
)
.frame(width: 50, height: 50)
.rotationEffect(.degrees(180))
// Value text
VStack(spacing: 0) {
Text("\(value)")
.font(.system(size: 14, weight: .bold, design: .monospaced))
.foregroundColor(isConnected ? .white : .gray)
}
}
// Channel name
Text(channelName)
.font(.system(size: 9, weight: .semibold, design: .monospaced))
.foregroundColor(channelColor(channelName))
}
}
private func dialColor(for value: Int) -> Color {
let ratio = Double(value) / 255.0
if ratio > 0.9 { return .red }
if ratio > 0.75 { return .orange }
if ratio > 0.5 { return .yellow }
return .green
}
private func channelColor(_ name: String) -> Color {
switch name {
case "L", "R", "PK", "M": return .green
case "CPU": return .blue
case "RAM": return .purple
case "DSK": return .teal
case "NET": return .indigo
default: return .gray
}
}
}
// MARK: - Hardware Settings View
struct HardwareSettingsView: View {
@EnvironmentObject var serialManager: SerialManager
var body: some View {
Form {
// Auto-Probe Section
Section("Auto-Detect Hardware") {
HStack {
Button(action: {
if serialManager.isProbing {
serialManager.stopAutoProbe()
} else {
serialManager.startAutoProbe()
}
}) {
HStack {
Image(systemName: serialManager.isProbing ? "stop.fill" : "magnifyingglass.circle.fill")
Text(serialManager.isProbing ? "Stop Probing" : "Auto-Detect VU Meter")
}
}
.disabled(serialManager.isConnected)
Spacer()
Button("Quick Connect") {
serialManager.autoConnect()
}
.disabled(serialManager.isConnected || serialManager.isProbing)
}
if serialManager.isProbing {
VStack(alignment: .leading, spacing: 8) {
ProgressView(value: serialManager.probeProgress) {
Text(serialManager.probeStatus)
.font(.caption)
}
}
}
if let detected = serialManager.detectedDevice {
HStack {
Image(systemName: "checkmark.circle.fill")
.foregroundColor(.green)
VStack(alignment: .leading) {
Text("Detected: \(detected.name)")
.font(.headline)
if let vid = detected.vendorID, let pid = detected.productID {
Text(String(format: "USB ID: %04X:%04X", vid, pid))
.font(.caption)
.foregroundColor(.secondary)
}
}
}
}
}
// Connection Section
Section("Serial Connection") {
// Port selection with USB info
Picker("Port", selection: $serialManager.selectedPortPath) {
Text("Select Port...").tag("")
ForEach(serialManager.availablePorts) { port in
HStack {
if port.isVUMeter {
Image(systemName: "star.fill")
.foregroundColor(.yellow)
}
Text(port.name)
if let vid = port.vendorID, let pid = port.productID {
Text(String(format: "(%04X:%04X)", vid, pid))
.foregroundColor(.secondary)
.font(.caption)
}
}
.tag(port.path)
}
}
HStack {
Button(action: { serialManager.refreshPorts() }) {
Label("Refresh", systemImage: "arrow.clockwise")
}
.buttonStyle(.borderless)
Spacer()
Text("\(serialManager.availablePorts.count) ports found")
.font(.caption)
.foregroundColor(.secondary)
}
// Baud rate
Picker("Baud Rate", selection: $serialManager.baudRate) {
ForEach(SerialManager.availableBaudRates, id: \.self) { rate in
Text("\(rate)").tag(rate)
}
}
// Protocol
Picker("Protocol", selection: $serialManager.selectedProtocol) {
ForEach(SerialProtocol.allCases) { proto in
Text(proto.rawValue).tag(proto)
}
}
// Connect button
Button(action: { serialManager.toggleConnection() }) {
HStack {
Image(systemName: serialManager.isConnected ? "bolt.slash.fill" : "bolt.fill")
Text(serialManager.isConnected ? "Disconnect" : "Connect")
}
}
.foregroundColor(serialManager.isConnected ? .red : .green)
.disabled(serialManager.isProbing)
}
// Dial Configuration Section
Section("Dial Assignments") {
ForEach(0..<4) { index in
DialConfigRow(
dialNumber: index + 1,
config: $serialManager.dialConfigs[index]
)
}
}
// Advanced Settings
Section("Advanced") {
ForEach(0..<4) { index in
DisclosureGroup("Dial \(index + 1) Settings") {
HStack {
Text("Min Value")
Spacer()
TextField("0", value: $serialManager.dialConfigs[index].minValue, format: .number)
.frame(width: 60)
.textFieldStyle(.roundedBorder)
}
HStack {
Text("Max Value")
Spacer()
TextField("255", value: $serialManager.dialConfigs[index].maxValue, format: .number)
.frame(width: 60)
.textFieldStyle(.roundedBorder)
}
Toggle("Invert", isOn: $serialManager.dialConfigs[index].inverted)
HStack {
Text("Smoothing")
Slider(value: $serialManager.dialConfigs[index].smoothing, in: 0...0.9)
Text("\(Int(serialManager.dialConfigs[index].smoothing * 100))%")
.frame(width: 40)
}
}
}
}
// Probe Results (for debugging)
if !serialManager.probeResults.isEmpty {
Section("Probe Results") {
ForEach(serialManager.probeResults.indices, id: \.self) { index in
let result = serialManager.probeResults[index]
HStack {
Image(systemName: result.success ? "checkmark.circle" : "xmark.circle")
.foregroundColor(result.success ? .green : .red)
VStack(alignment: .leading) {
Text(result.port.name)
.font(.caption)
Text("\(result.baudRate) baud - \(result.protocol_.rawValue)")
.font(.caption2)
.foregroundColor(.secondary)
}
Spacer()
if let response = result.response {
Text(response.prefix(20) + "...")
.font(.caption2)
.foregroundColor(.green)
}
}
}
Button("Clear Results") {
serialManager.probeResults.removeAll()
}
}
}
// Protocol Info
Section("Protocol Reference") {
VStack(alignment: .leading, spacing: 8) {
protocolInfo
}
.font(.system(size: 11, design: .monospaced))
.foregroundColor(.secondary)
}
}
.formStyle(.grouped)
}
@ViewBuilder
private var protocolInfo: some View {
switch serialManager.selectedProtocol {
case .rawBytes:
Text("Format: [0xAA] [D1] [D2] [D3] [D4] [0x55]")
Text("Values: 0-255 per dial")
case .textCommand:
Text("Format: CH1:val;CH2:val;CH3:val;CH4:val\\n")
Text("Values: 0-255 per channel")
case .json:
Text("Format: {\"dials\":[d1,d2,d3,d4]}\\n")
Text("Values: 0-255 array")
case .vuServer:
Text("Format: #0:val\\n#1:val\\n#2:val\\n#3:val\\n")
Text("Values: 0-100 percentage per dial")
}
}
}
// MARK: - Dial Config Row
struct DialConfigRow: View {
let dialNumber: Int
@Binding var config: DialConfig
var body: some View {
HStack {
Text("Dial \(dialNumber)")
.font(.system(.body, design: .monospaced))
.frame(width: 60, alignment: .leading)
Picker("", selection: $config.dialChannel) {
ForEach(DialChannel.allCases) { channel in
Text(channel.rawValue).tag(channel)
}
}
.labelsHidden()
}
}
}
// MARK: - Button Styles
struct HardwareButtonStyle: ButtonStyle {
let isConnected: Bool
func makeBody(configuration: Configuration) -> some View {
configuration.label
.font(.system(size: 12, weight: .semibold))
.foregroundColor(.white)
.padding(.vertical, 8)
.background(
RoundedRectangle(cornerRadius: 8)
.fill(isConnected ? Color.red.opacity(0.7) : Color.green.opacity(0.7))
.opacity(configuration.isPressed ? 0.6 : 1.0)
)
}
}
struct ProbeButtonStyle: ButtonStyle {
let isProbing: Bool
func makeBody(configuration: Configuration) -> some View {
configuration.label
.font(.system(size: 12, weight: .semibold))
.foregroundColor(.white)
.padding(.vertical, 8)
.background(
RoundedRectangle(cornerRadius: 8)
.fill(isProbing ? Color.orange.opacity(0.7) : Color.blue.opacity(0.7))
.opacity(configuration.isPressed ? 0.6 : 1.0)
)
}
}
// MARK: - Preview
#Preview {
HardwareSettingsView()
.environmentObject(SerialManager())
.frame(width: 500, height: 700)
}
+32
View File
@@ -0,0 +1,32 @@
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>CFBundleDevelopmentRegion</key>
<string>$(DEVELOPMENT_LANGUAGE)</string>
<key>CFBundleExecutable</key>
<string>$(EXECUTABLE_NAME)</string>
<key>CFBundleIconFile</key>
<string></string>
<key>CFBundleIdentifier</key>
<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
<key>CFBundleInfoDictionaryVersion</key>
<string>6.0</string>
<key>CFBundleName</key>
<string>$(PRODUCT_NAME)</string>
<key>CFBundlePackageType</key>
<string>$(PRODUCT_BUNDLE_PACKAGE_TYPE)</string>
<key>CFBundleShortVersionString</key>
<string>1.0</string>
<key>CFBundleVersion</key>
<string>1</string>
<key>LSMinimumSystemVersion</key>
<string>$(MACOSX_DEPLOYMENT_TARGET)</string>
<key>NSHumanReadableCopyright</key>
<string>Copyright © 2024. All rights reserved.</string>
<key>NSMicrophoneUsageDescription</key>
<string>Audio VU Meter needs access to audio input to display audio levels from BlackHole or other audio devices.</string>
<key>NSPrincipalClass</key>
<string>NSApplication</string>
</dict>
</plist>
@@ -0,0 +1,756 @@
//
// SerialManager.swift
// AudioVUMeter
//
// Serial communication manager for physical VU meter hardware
// Supports multiple protocols: Raw bytes, Text commands, JSON, VU-Server compatible
// Includes auto-probing to find connected VU meter hardware
//
import Foundation
import IOKit
import IOKit.serial
import IOKit.usb
/// Protocol format for serial communication
enum SerialProtocol: String, CaseIterable, Identifiable {
case rawBytes = "Raw Bytes (0-255)"
case textCommand = "Text Commands"
case json = "JSON Format"
case vuServer = "VU-Server Compatible"
var id: String { rawValue }
/// Probe command for this protocol
var probeCommand: Data {
switch self {
case .rawBytes:
// Send test pattern
return Data([0xAA, 0x00, 0x00, 0x00, 0x00, 0x55])
case .textCommand:
return "PING\n".data(using: .utf8)!
case .json:
return "{\"cmd\":\"ping\"}\n".data(using: .utf8)!
case .vuServer:
return "?\n".data(using: .utf8)! // Query command
}
}
}
/// Represents a serial port device with extended info
struct SerialPort: Identifiable, Hashable {
let id: String
let path: String
let name: String
let vendorID: Int?
let productID: Int?
let isVUMeter: Bool // Detected as VU meter
init(path: String, name: String, vendorID: Int? = nil, productID: Int? = nil, isVUMeter: Bool = false) {
self.id = path
self.path = path
self.name = name
self.vendorID = vendorID
self.productID = productID
self.isVUMeter = isVUMeter
}
}
/// Probe result for a serial port
struct ProbeResult {
let port: SerialPort
let protocol_: SerialProtocol
let baudRate: Int
let success: Bool
let response: String?
let responseTime: TimeInterval
}
/// Channel assignment for physical VU meters
enum DialChannel: String, CaseIterable, Identifiable {
case audioLeft = "Audio Left"
case audioRight = "Audio Right"
case cpu = "CPU Usage"
case ram = "RAM Usage"
case disk = "Disk Activity"
case network = "Network Activity"
case audioPeak = "Audio Peak"
case audioMono = "Audio Mono (L+R)"
var id: String { rawValue }
}
/// Configuration for a single dial
struct DialConfig: Identifiable, Codable {
let id: Int
var channel: String
var minValue: Int
var maxValue: Int
var inverted: Bool
var smoothing: Double
init(id: Int, channel: DialChannel = .audioLeft) {
self.id = id
self.channel = channel.rawValue
self.minValue = 0
self.maxValue = 255
self.inverted = false
self.smoothing = 0.3
}
}
/// Serial communication manager with auto-probing
class SerialManager: ObservableObject {
// MARK: - Published Properties
@Published var isConnected = false
@Published var availablePorts: [SerialPort] = []
@Published var selectedPortPath: String = ""
@Published var selectedProtocol: SerialProtocol = .vuServer
@Published var baudRate: Int = 115200
@Published var dialConfigs: [DialConfig] = []
@Published var lastError: String?
@Published var bytesSent: UInt64 = 0
// Auto-probe state
@Published var isProbing = false
@Published var probeProgress: Double = 0
@Published var probeStatus: String = ""
@Published var detectedDevice: SerialPort?
@Published var probeResults: [ProbeResult] = []
// Current dial values (0-255)
@Published var dialValues: [Int] = [0, 0, 0, 0]
// MARK: - Private Properties
private var fileDescriptor: Int32 = -1
private var writeQueue = DispatchQueue(label: "serial.write", qos: .userInteractive)
private var probeQueue = DispatchQueue(label: "serial.probe", qos: .userInitiated)
private var updateTimer: Timer?
private let updateInterval: TimeInterval = 1.0 / 30.0 // 30 Hz update rate
// Smoothed values for each dial
private var smoothedValues: [Double] = [0, 0, 0, 0]
// Known VU meter USB identifiers
private let knownVUMeterDevices: [(vendorID: Int, productID: Int, name: String)] = [
(0x1A86, 0x7523, "CH340 Serial"), // Common CH340 USB-Serial
(0x10C4, 0xEA60, "CP210x Serial"), // Silicon Labs CP210x
(0x0403, 0x6001, "FTDI Serial"), // FTDI FT232
(0x0403, 0x6015, "FTDI FT231X"), // FTDI FT231X
(0x2341, 0x0043, "Arduino Uno"), // Arduino Uno
(0x2341, 0x0001, "Arduino Mega"), // Arduino Mega
(0x1B4F, 0x9206, "SparkFun Pro Micro"), // SparkFun
(0x239A, 0x8014, "Adafruit Feather"), // Adafruit
]
// MARK: - Initialization
init() {
// Initialize 4 dial configurations with default assignments
dialConfigs = [
DialConfig(id: 0, channel: .audioLeft),
DialConfig(id: 1, channel: .audioRight),
DialConfig(id: 2, channel: .cpu),
DialConfig(id: 3, channel: .ram)
]
refreshPorts()
}
deinit {
disconnect()
}
// MARK: - Port Management
/// Refresh list of available serial ports with USB info
func refreshPorts() {
availablePorts = getSerialPortsWithUSBInfo()
// Auto-select VU meter if found
if let vuMeter = availablePorts.first(where: { $0.isVUMeter }) {
selectedPortPath = vuMeter.path
} else if selectedPortPath.isEmpty, let firstPort = availablePorts.first {
selectedPortPath = firstPort.path
}
}
/// Get all available serial ports with USB vendor/product info
private func getSerialPortsWithUSBInfo() -> [SerialPort] {
var ports: [SerialPort] = []
var iterator: io_iterator_t = 0
let matchingDict = IOServiceMatching(kIOSerialBSDServiceValue)
let result = IOServiceGetMatchingServices(kIOMainPortDefault, matchingDict, &iterator)
guard result == KERN_SUCCESS else { return ports }
var service: io_object_t = IOIteratorNext(iterator)
while service != 0 {
defer {
IOObjectRelease(service)
service = IOIteratorNext(iterator)
}
// Get device path
guard let pathKey = IORegistryEntryCreateCFProperty(
service,
kIOCalloutDeviceKey as CFString,
kCFAllocatorDefault,
0
)?.takeRetainedValue() as? String else { continue }
// Filter for cu.* devices (not tty.*)
guard pathKey.contains("cu.") else { continue }
// Get device name
var name = pathKey.components(separatedBy: "/").last ?? "Unknown"
// Try to get USB info by traversing the registry
var vendorID: Int?
var productID: Int?
var isVUMeter = false
// Walk up the registry to find USB device info
var parent: io_object_t = 0
var current = service
IOObjectRetain(current)
for _ in 0..<10 { // Max depth
if IORegistryEntryGetParentEntry(current, kIOServicePlane, &parent) != KERN_SUCCESS {
break
}
IOObjectRelease(current)
current = parent
// Try to get vendor ID
if let vid = IORegistryEntryCreateCFProperty(
current,
"idVendor" as CFString,
kCFAllocatorDefault,
0
)?.takeRetainedValue() as? Int {
vendorID = vid
}
// Try to get product ID
if let pid = IORegistryEntryCreateCFProperty(
current,
"idProduct" as CFString,
kCFAllocatorDefault,
0
)?.takeRetainedValue() as? Int {
productID = pid
}
// Try to get USB product name
if let usbName = IORegistryEntryCreateCFProperty(
current,
"USB Product Name" as CFString,
kCFAllocatorDefault,
0
)?.takeRetainedValue() as? String {
name = usbName
}
if vendorID != nil && productID != nil {
break
}
}
IOObjectRelease(current)
// Check if this is a known VU meter device
if let vid = vendorID, let pid = productID {
isVUMeter = knownVUMeterDevices.contains { $0.vendorID == vid && $0.productID == pid }
// Also check name for VU-related keywords
let lowerName = name.lowercased()
if lowerName.contains("vu") || lowerName.contains("dial") || lowerName.contains("meter") {
isVUMeter = true
}
}
ports.append(SerialPort(
path: pathKey,
name: name,
vendorID: vendorID,
productID: productID,
isVUMeter: isVUMeter
))
}
IOObjectRelease(iterator)
// Sort: VU meters first, then by name
return ports.sorted { ($0.isVUMeter ? 0 : 1, $0.name) < ($1.isVUMeter ? 0 : 1, $1.name) }
}
// MARK: - Auto-Probing
/// Auto-probe all ports to find VU meter hardware
func startAutoProbe() {
guard !isProbing else { return }
isProbing = true
probeProgress = 0
probeStatus = "Starting auto-probe..."
probeResults = []
detectedDevice = nil
probeQueue.async { [weak self] in
self?.performAutoProbe()
}
}
/// Stop auto-probing
func stopAutoProbe() {
isProbing = false
DispatchQueue.main.async {
self.probeStatus = "Probe cancelled"
}
}
/// Perform the actual auto-probe
private func performAutoProbe() {
let ports = availablePorts
let baudRates = [115200, 9600, 57600, 38400, 19200] // Most common first
let protocols = SerialProtocol.allCases
let totalSteps = Double(ports.count * baudRates.count * protocols.count)
var currentStep = 0
var bestResult: ProbeResult?
for port in ports {
guard isProbing else { break }
DispatchQueue.main.async {
self.probeStatus = "Probing: \(port.name)"
}
for baud in baudRates {
guard isProbing else { break }
for proto in protocols {
guard isProbing else { break }
currentStep += 1
DispatchQueue.main.async {
self.probeProgress = Double(currentStep) / totalSteps
}
// Try to probe this combination
if let result = probePort(port: port, baudRate: baud, protocol_: proto) {
DispatchQueue.main.async {
self.probeResults.append(result)
}
if result.success {
// Found a working device!
if bestResult == nil || result.responseTime < bestResult!.responseTime {
bestResult = result
}
// If we got a response, this is very likely the device
if result.response != nil {
DispatchQueue.main.async {
self.detectedDevice = port
self.selectedPortPath = port.path
self.selectedProtocol = proto
self.baudRate = baud
self.probeStatus = "Found VU Meter: \(port.name)"
self.isProbing = false
}
return
}
}
}
}
}
}
// Probing complete
DispatchQueue.main.async {
self.isProbing = false
self.probeProgress = 1.0
if let best = bestResult {
self.detectedDevice = best.port
self.selectedPortPath = best.port.path
self.selectedProtocol = best.protocol_
self.baudRate = best.baudRate
self.probeStatus = "Found: \(best.port.name) (\(best.protocol_.rawValue))"
} else {
self.probeStatus = "No VU meter found"
}
}
}
/// Probe a single port with specific settings
private func probePort(port: SerialPort, baudRate: Int, protocol_: SerialProtocol) -> ProbeResult? {
let fd = open(port.path, O_RDWR | O_NOCTTY | O_NONBLOCK)
guard fd != -1 else { return nil }
defer { close(fd) }
// Configure port
var options = termios()
tcgetattr(fd, &options)
let speed = getBaudRateConstant(baudRate)
cfsetispeed(&options, speed)
cfsetospeed(&options, speed)
options.c_cflag &= ~UInt(PARENB | CSTOPB | CSIZE)
options.c_cflag |= UInt(CS8 | CREAD | CLOCAL)
options.c_lflag &= ~UInt(ICANON | ECHO | ECHOE | ISIG)
options.c_oflag &= ~UInt(OPOST)
// Set read timeout
options.c_cc.16 = 0 // VMIN
options.c_cc.17 = 5 // VTIME (0.5 seconds)
tcsetattr(fd, TCSANOW, &options)
tcflush(fd, TCIOFLUSH)
// Send probe command
let probeData = protocol_.probeCommand
let startTime = Date()
let written = probeData.withUnsafeBytes { buffer -> Int in
guard let baseAddress = buffer.baseAddress else { return -1 }
return write(fd, baseAddress, probeData.count)
}
guard written > 0 else {
return ProbeResult(port: port, protocol_: protocol_, baudRate: baudRate,
success: false, response: nil, responseTime: 0)
}
// Wait for response
usleep(100_000) // 100ms
// Try to read response
var readBuffer = [UInt8](repeating: 0, count: 256)
let bytesRead = read(fd, &readBuffer, readBuffer.count)
let responseTime = Date().timeIntervalSince(startTime)
if bytesRead > 0 {
let response = String(bytes: readBuffer.prefix(bytesRead), encoding: .utf8)?
.trimmingCharacters(in: .whitespacesAndNewlines)
return ProbeResult(port: port, protocol_: protocol_, baudRate: baudRate,
success: true, response: response, responseTime: responseTime)
}
// No response, but connection succeeded - might still be valid
// (some devices don't respond to probes but accept data)
return ProbeResult(port: port, protocol_: protocol_, baudRate: baudRate,
success: written > 0, response: nil, responseTime: responseTime)
}
/// Quick probe - just check if port opens and accepts data
func quickProbe(port: SerialPort) -> Bool {
let fd = open(port.path, O_RDWR | O_NOCTTY | O_NONBLOCK)
guard fd != -1 else { return false }
defer { close(fd) }
// Try to write a simple test
var options = termios()
tcgetattr(fd, &options)
let speed = getBaudRateConstant(115200)
cfsetispeed(&options, speed)
cfsetospeed(&options, speed)
options.c_cflag &= ~UInt(PARENB | CSTOPB | CSIZE)
options.c_cflag |= UInt(CS8 | CREAD | CLOCAL)
tcsetattr(fd, TCSANOW, &options)
let testData = Data([0xAA, 0x00, 0x00, 0x00, 0x00, 0x55])
let written = testData.withUnsafeBytes { buffer -> Int in
guard let baseAddress = buffer.baseAddress else { return -1 }
return write(fd, baseAddress, testData.count)
}
return written > 0
}
// MARK: - Connection Management
/// Connect to selected serial port
func connect() {
guard !selectedPortPath.isEmpty else {
lastError = "No port selected"
return
}
// Open serial port
fileDescriptor = open(selectedPortPath, O_RDWR | O_NOCTTY | O_NONBLOCK)
guard fileDescriptor != -1 else {
lastError = "Failed to open port: \(String(cString: strerror(errno)))"
return
}
// Configure serial port
var options = termios()
tcgetattr(fileDescriptor, &options)
// Set baud rate
let speed = getBaudRateConstant(baudRate)
cfsetispeed(&options, speed)
cfsetospeed(&options, speed)
// Configure 8N1
options.c_cflag &= ~UInt(PARENB) // No parity
options.c_cflag &= ~UInt(CSTOPB) // 1 stop bit
options.c_cflag &= ~UInt(CSIZE)
options.c_cflag |= UInt(CS8) // 8 data bits
// Enable receiver, ignore modem control lines
options.c_cflag |= UInt(CREAD | CLOCAL)
// Raw input
options.c_lflag &= ~UInt(ICANON | ECHO | ECHOE | ISIG)
// Raw output
options.c_oflag &= ~UInt(OPOST)
// Apply settings
tcsetattr(fileDescriptor, TCSANOW, &options)
// Clear any pending data
tcflush(fileDescriptor, TCIOFLUSH)
isConnected = true
lastError = nil
print("Connected to \(selectedPortPath) at \(baudRate) baud")
// Start update timer
startUpdateTimer()
}
/// Auto-connect: probe and connect to first found device
func autoConnect() {
refreshPorts()
// First, try already marked VU meters
if let vuMeter = availablePorts.first(where: { $0.isVUMeter }) {
selectedPortPath = vuMeter.path
connect()
if isConnected { return }
}
// Quick probe all ports
for port in availablePorts {
if quickProbe(port: port) {
selectedPortPath = port.path
connect()
if isConnected {
print("Auto-connected to \(port.name)")
return
}
}
}
lastError = "No VU meter found"
}
/// Disconnect from serial port
func disconnect() {
stopUpdateTimer()
if fileDescriptor != -1 {
close(fileDescriptor)
fileDescriptor = -1
}
isConnected = false
print("Disconnected from serial port")
}
/// Toggle connection state
func toggleConnection() {
if isConnected {
disconnect()
} else {
connect()
}
}
// MARK: - Data Transmission
/// Update dial values from audio and system monitors
func updateValues(audioEngine: AudioEngine, systemMonitor: SystemMonitor) {
for (index, config) in dialConfigs.enumerated() {
guard index < 4 else { break }
var rawValue: Double = 0
// Get value based on channel assignment
switch DialChannel(rawValue: config.channel) ?? .audioLeft {
case .audioLeft:
rawValue = audioEngine.leftLevel * 100
case .audioRight:
rawValue = audioEngine.rightLevel * 100
case .audioPeak:
rawValue = max(audioEngine.leftPeak, audioEngine.rightPeak) * 100
case .audioMono:
rawValue = ((audioEngine.leftLevel + audioEngine.rightLevel) / 2) * 100
case .cpu:
rawValue = systemMonitor.cpuUsage
case .ram:
rawValue = systemMonitor.memoryUsage
case .disk:
rawValue = systemMonitor.diskActivity
case .network:
rawValue = systemMonitor.networkActivity
}
// Apply smoothing
let smoothing = config.smoothing
smoothedValues[index] = smoothedValues[index] * smoothing + rawValue * (1 - smoothing)
// Map to dial range
var mappedValue = Int((smoothedValues[index] / 100.0) * Double(config.maxValue - config.minValue)) + config.minValue
// Apply inversion if needed
if config.inverted {
mappedValue = config.maxValue - mappedValue + config.minValue
}
// Clamp to valid range
dialValues[index] = max(config.minValue, min(config.maxValue, mappedValue))
}
}
/// Send current values to hardware
func sendValues() {
guard isConnected, fileDescriptor != -1 else { return }
writeQueue.async { [weak self] in
guard let self = self else { return }
let data: Data
switch self.selectedProtocol {
case .rawBytes:
data = self.formatRawBytes()
case .textCommand:
data = self.formatTextCommand()
case .json:
data = self.formatJSON()
case .vuServer:
data = self.formatVUServer()
}
self.writeData(data)
}
}
// MARK: - Protocol Formatters
/// Format as raw bytes: [0xAA, ch1, ch2, ch3, ch4, 0x55]
private func formatRawBytes() -> Data {
var bytes: [UInt8] = [0xAA] // Start marker
for value in dialValues {
bytes.append(UInt8(clamping: value))
}
bytes.append(0x55) // End marker
return Data(bytes)
}
/// Format as text commands: "CH1:128;CH2:64;CH3:200;CH4:32\n"
private func formatTextCommand() -> Data {
let commands = dialValues.enumerated().map { "CH\($0 + 1):\($1)" }
let message = commands.joined(separator: ";") + "\n"
return message.data(using: .utf8) ?? Data()
}
/// Format as JSON: {"dials":[128,64,200,32]}
private func formatJSON() -> Data {
let json: [String: Any] = ["dials": dialValues]
if let data = try? JSONSerialization.data(withJSONObject: json, options: []) {
return data + "\n".data(using: .utf8)!
}
return Data()
}
/// Format for VU-Server compatible hardware
/// Protocol: #<dial_id>:<value>\n
private func formatVUServer() -> Data {
var message = ""
for (index, value) in dialValues.enumerated() {
// VU-Server uses percentage values 0-100
let percentage = (value * 100) / 255
message += "#\(index):\(percentage)\n"
}
return message.data(using: .utf8) ?? Data()
}
// MARK: - Low-level I/O
/// Write data to serial port
private func writeData(_ data: Data) {
guard !data.isEmpty else { return }
data.withUnsafeBytes { buffer in
guard let baseAddress = buffer.baseAddress else { return }
let written = write(fileDescriptor, baseAddress, data.count)
if written > 0 {
DispatchQueue.main.async {
self.bytesSent += UInt64(written)
}
} else if written < 0 {
let error = String(cString: strerror(errno))
DispatchQueue.main.async {
self.lastError = "Write error: \(error)"
}
}
}
}
// MARK: - Timer Management
private func startUpdateTimer() {
stopUpdateTimer()
updateTimer = Timer.scheduledTimer(withTimeInterval: updateInterval, repeats: true) { [weak self] _ in
self?.sendValues()
}
}
private func stopUpdateTimer() {
updateTimer?.invalidate()
updateTimer = nil
}
// MARK: - Helpers
private func getBaudRateConstant(_ rate: Int) -> speed_t {
switch rate {
case 9600: return speed_t(B9600)
case 19200: return speed_t(B19200)
case 38400: return speed_t(B38400)
case 57600: return speed_t(B57600)
case 115200: return speed_t(B115200)
case 230400: return speed_t(B230400)
default: return speed_t(B115200)
}
}
/// Available baud rates
static let availableBaudRates = [9600, 19200, 38400, 57600, 115200, 230400]
}
// MARK: - Dial Config Channel Extension
extension DialConfig {
var dialChannel: DialChannel {
get { DialChannel(rawValue: channel) ?? .audioLeft }
set { channel = newValue.rawValue }
}
}
@@ -0,0 +1,145 @@
//
// SettingsView.swift
// AudioVUMeter
//
// Settings window for configuring audio device, hardware output, and preferences
//
import SwiftUI
struct SettingsView: View {
@EnvironmentObject var audioEngine: AudioEngine
@EnvironmentObject var serialManager: SerialManager
@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")
}
// Hardware Settings
HardwareSettingsView()
.environmentObject(serialManager)
.tabItem {
Label("Hardware", systemImage: "cable.connector")
}
// 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 1.1.0")
.foregroundColor(.secondary)
Divider()
.frame(width: 200)
VStack(spacing: 8) {
Text("A macOS audio level meter with system monitoring")
Text("and physical VU meter hardware support.")
}
.multilineTextAlignment(.center)
.foregroundColor(.secondary)
.frame(width: 300)
Spacer()
VStack(spacing: 4) {
Text("Supports BlackHole virtual audio device")
Text("and USB/Serial VU meter hardware")
}
.font(.caption)
.foregroundColor(.secondary)
}
.padding()
.tabItem {
Label("About", systemImage: "info.circle")
}
}
.frame(width: 500, height: 400)
}
}
#Preview {
SettingsView()
.environmentObject(AudioEngine())
.environmentObject(SerialManager())
}
@@ -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<host_cpu_load_info>.stride / MemoryLayout<integer_t>.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<vm_statistics64>.stride / MemoryLayout<integer_t>.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<ifaddrs>?
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))
}
}
+256
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@@ -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..<segmentCount).reversed(), id: \.self) { index in
let segmentThreshold = Double(index) / Double(segmentCount)
let isLit = animatedLevel > 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)
}
+230
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@@ -0,0 +1,230 @@
# 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. **Now with physical VU meter hardware support!**
![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
### Physical VU Meter Hardware Support
- **4 Physical Dials** - Support for up to 4 physical VU meter dials
- **Flexible Channel Mapping** - Assign any metric to any dial:
- Audio Left/Right channels
- Audio Peak or Mono (L+R)
- CPU, RAM, Disk, Network usage
- **Multiple Serial Protocols**:
- Raw Bytes: `[0xAA] [D1] [D2] [D3] [D4] [0x55]`
- Text Commands: `CH1:val;CH2:val;CH3:val;CH4:val\n`
- JSON: `{"dials":[d1,d2,d3,d4]}`
- VU-Server Compatible: `#0:val\n#1:val\n...`
- **Configurable per dial**: Min/max values, inversion, smoothing
- **Auto-detection** of USB serial devices
## Requirements
- macOS 13.0 (Ventura) or later
- Xcode 15.0 or later (for building)
- [BlackHole](https://existential.audio/blackhole/) virtual audio driver (recommended)
- USB/Serial VU meter hardware (optional)
## 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 (Cmd+R)
```bash
git clone <repository-url>
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
- **Hardware Output**: Shows status of connected physical VU meters
### Controls
- **Start/Stop**: Toggle audio capture on/off
- **Reset**: Clear peak hold indicators
- **Settings** (gear icon): Access device selection and preferences
- **Hardware** (cable icon): Configure physical VU meter connection
### Hardware Setup
1. Connect your USB/Serial VU meter hardware
2. Click the cable icon or go to Settings -> Hardware
3. Select your serial port from the dropdown
4. Choose the appropriate baud rate (default: 115200)
5. Select the communication protocol your hardware uses
6. Assign channels to each dial (Audio L, R, CPU, RAM, etc.)
7. Click "Connect"
### 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
- **Hardware**: Serial port, protocol, and dial assignments
## 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
├── SerialManager.swift # USB/Serial communication
├── HardwareView.swift # Hardware configuration UI
├── 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
- **SerialManager**: Handles USB/Serial communication with physical VU meter hardware
- **VUMeterView**: SwiftUI views for classic vertical VU meters with segment-based display
- **SystemMeterView**: Circular gauge components for system metrics
## Hardware Protocol Reference
### Raw Bytes Protocol
```
Start: 0xAA
Data: [Dial1] [Dial2] [Dial3] [Dial4] (0-255 each)
End: 0x55
```
### Text Command Protocol
```
CH1:128;CH2:64;CH3:200;CH4:32\n
```
### JSON Protocol
```json
{"dials":[128,64,200,32]}
```
### VU-Server Compatible Protocol
```
#0:50
#1:75
#2:30
#3:90
```
Values are percentages (0-100)
## 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
## Compatible Hardware
This app is designed to work with:
- [VU Dials by Sasa Karanovic](https://github.com/SasaKaranovic/VU-Server)
- Arduino-based VU meters with serial interface
- Any USB/Serial device accepting the supported protocols
## 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
```
### SerialManager
```swift
// Connection
serialManager.connect()
serialManager.disconnect()
// Configuration
serialManager.selectedPortPath = "/dev/cu.usbserial-XXX"
serialManager.baudRate = 115200
serialManager.selectedProtocol = .vuServer
// Dial assignment
serialManager.dialConfigs[0].dialChannel = .audioLeft
serialManager.dialConfigs[1].dialChannel = .audioRight
serialManager.dialConfigs[2].dialChannel = .cpu
serialManager.dialConfigs[3].dialChannel = .ram
```
## License
MIT License - See LICENSE file for details.
## Credits
Inspired by [VU-Server](https://github.com/SasaKaranovic/VU-Server) by Sasa Karanovic.