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CoreAudio output device useful methods in Swift 4
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| /* | |
| static func getOutputDevices() -> [AudioDeviceID: String]? | |
| static func isOutputDevice(deviceID: AudioDeviceID) -> Bool | |
| static func getAggregateDeviceSubDeviceList(deviceID: AudioDeviceID) -> [AudioDeviceID] | |
| static func isAggregateDevice(deviceID: AudioDeviceID) -> Bool | |
| static func setDeviceVolume(deviceID: AudioDeviceID, leftChannelLevel: Float, rightChannelLevel: Float) | |
| static func setOutputDevice(newDeviceID: AudioDeviceID) | |
| static func getDeviceVolume(deviceID: AudioDeviceID) -> [Float] | |
| static func getDefaultOutputDevice() -> AudioDeviceID | |
| */ | |
| import Foundation | |
| import Cocoa | |
| import AudioToolbox | |
| public class Audio { | |
| static func getOutputDevices() -> [AudioDeviceID: String]? { | |
| var result: [AudioDeviceID: String] = [:] | |
| let devices = getAllDevices() | |
| for device in devices { | |
| if isOutputDevice(deviceID: device) { | |
| result[device] = getDeviceName(deviceID: device) | |
| } | |
| } | |
| return result | |
| } | |
| static func isOutputDevice(deviceID: AudioDeviceID) -> Bool { | |
| var propertySize: UInt32 = 256 | |
| var propertyAddress = AudioObjectPropertyAddress( | |
| mSelector: AudioObjectPropertySelector(kAudioDevicePropertyStreams), | |
| mScope: AudioObjectPropertyScope(kAudioDevicePropertyScopeOutput), | |
| mElement: AudioObjectPropertyElement(kAudioObjectPropertyElementMaster)) | |
| _ = AudioObjectGetPropertyDataSize(deviceID, &propertyAddress, 0, nil, &propertySize) | |
| return propertySize > 0 | |
| } | |
| static func getAggregateDeviceSubDeviceList(deviceID: AudioDeviceID) -> [AudioDeviceID] { | |
| let subDevicesCount = getNumberOfSubDevices(deviceID: deviceID) | |
| var subDevices = [AudioDeviceID](repeating: 0, count: Int(subDevicesCount)) | |
| var propertyAddress = AudioObjectPropertyAddress( | |
| mSelector: AudioObjectPropertySelector(kAudioAggregateDevicePropertyActiveSubDeviceList), | |
| mScope: AudioObjectPropertyScope(kAudioObjectPropertyScopeGlobal), | |
| mElement: AudioObjectPropertyElement(kAudioObjectPropertyElementMaster)) | |
| var subDevicesSize = subDevicesCount * UInt32(MemoryLayout<UInt32>.size) | |
| AudioObjectGetPropertyData(deviceID, &propertyAddress, 0, nil, &subDevicesSize, &subDevices) | |
| return subDevices | |
| } | |
| static func isAggregateDevice(deviceID: AudioDeviceID) -> Bool { | |
| let deviceType = getDeviceTransportType(deviceID: deviceID) | |
| return deviceType == kAudioDeviceTransportTypeAggregate | |
| } | |
| static func setDeviceVolume(deviceID: AudioDeviceID, leftChannelLevel: Float, rightChannelLevel: Float) { | |
| let channelsCount = 2 | |
| var channels = [UInt32](repeating: 0, count: channelsCount) | |
| var propertySize = UInt32(MemoryLayout<UInt32>.size * channelsCount) | |
| var leftLevel = leftChannelLevel | |
| var rigthLevel = rightChannelLevel | |
| var propertyAddress = AudioObjectPropertyAddress( | |
| mSelector: AudioObjectPropertySelector(kAudioDevicePropertyPreferredChannelsForStereo), | |
| mScope: AudioObjectPropertyScope(kAudioDevicePropertyScopeOutput), | |
| mElement: AudioObjectPropertyElement(kAudioObjectPropertyElementMaster)) | |
| let status = AudioObjectGetPropertyData(deviceID, &propertyAddress, 0, nil, &propertySize, &channels) | |
| if status != noErr { return } | |
| propertyAddress.mSelector = kAudioDevicePropertyVolumeScalar | |
| propertySize = UInt32(MemoryLayout<Float32>.size) | |
| propertyAddress.mElement = channels[0] | |
| AudioObjectSetPropertyData(deviceID, &propertyAddress, 0, nil, propertySize, &leftLevel) | |
| propertyAddress.mElement = channels[1] | |
| AudioObjectSetPropertyData(deviceID, &propertyAddress, 0, nil, propertySize, &rigthLevel) | |
| } | |
| static func setOutputDevice(newDeviceID: AudioDeviceID) { | |
| let propertySize = UInt32(MemoryLayout<UInt32>.size) | |
| var deviceID = newDeviceID | |
| var propertyAddress = AudioObjectPropertyAddress( | |
| mSelector: AudioObjectPropertySelector(kAudioHardwarePropertyDefaultOutputDevice), | |
| mScope: AudioObjectPropertyScope(kAudioObjectPropertyScopeGlobal), | |
| mElement: AudioObjectPropertyElement(kAudioObjectPropertyElementMaster)) | |
| AudioObjectSetPropertyData(AudioObjectID(kAudioObjectSystemObject), &propertyAddress, 0, nil, propertySize, &deviceID) | |
| } | |
| static func getDeviceVolume(deviceID: AudioDeviceID) -> [Float] { | |
| let channelsCount = 2 | |
| var channels = [UInt32](repeating: 0, count: channelsCount) | |
| var propertySize = UInt32(MemoryLayout<UInt32>.size * channelsCount) | |
| var leftLevel = Float32(-1) | |
| var rigthLevel = Float32(-1) | |
| var propertyAddress = AudioObjectPropertyAddress( | |
| mSelector: AudioObjectPropertySelector(kAudioDevicePropertyPreferredChannelsForStereo), | |
| mScope: AudioObjectPropertyScope(kAudioDevicePropertyScopeOutput), | |
| mElement: AudioObjectPropertyElement(kAudioObjectPropertyElementMaster)) | |
| let status = AudioObjectGetPropertyData(deviceID, &propertyAddress, 0, nil, &propertySize, &channels) | |
| if status != noErr { return [-1] } | |
| propertyAddress.mSelector = kAudioDevicePropertyVolumeScalar | |
| propertySize = UInt32(MemoryLayout<Float32>.size) | |
| propertyAddress.mElement = channels[0] | |
| AudioObjectGetPropertyData(deviceID, &propertyAddress, 0, nil, &propertySize, &leftLevel) | |
| propertyAddress.mElement = channels[1] | |
| AudioObjectGetPropertyData(deviceID, &propertyAddress, 0, nil, &propertySize, &rigthLevel) | |
| return [leftLevel, rigthLevel] | |
| } | |
| static func getDefaultOutputDevice() -> AudioDeviceID { | |
| var propertySize = UInt32(MemoryLayout<AudioDeviceID>.size) | |
| var deviceID = kAudioDeviceUnknown | |
| var propertyAddress = AudioObjectPropertyAddress( | |
| mSelector: AudioObjectPropertySelector(kAudioHardwarePropertyDefaultOutputDevice), | |
| mScope: AudioObjectPropertyScope(kAudioObjectPropertyScopeGlobal), | |
| mElement: AudioObjectPropertyElement(kAudioObjectPropertyElementMaster)) | |
| AudioObjectGetPropertyData(AudioObjectID(kAudioObjectSystemObject), &propertyAddress, 0, nil, &propertySize, &deviceID) | |
| return deviceID | |
| } | |
| private static func getDeviceTransportType(deviceID: AudioDeviceID) -> AudioDevicePropertyID { | |
| var deviceTransportType = AudioDevicePropertyID() | |
| var propertySize = UInt32(MemoryLayout<AudioDevicePropertyID>.size) | |
| var propertyAddress = AudioObjectPropertyAddress( | |
| mSelector: AudioObjectPropertySelector(kAudioDevicePropertyTransportType), | |
| mScope: AudioObjectPropertyScope(kAudioObjectPropertyScopeGlobal), | |
| mElement: AudioObjectPropertyElement(kAudioObjectPropertyElementMaster)) | |
| AudioObjectGetPropertyData(deviceID, &propertyAddress, 0, nil, &propertySize, &deviceTransportType) | |
| return deviceTransportType | |
| } | |
| private static func getNumberOfDevices() -> UInt32 { | |
| var propertySize: UInt32 = 0 | |
| var propertyAddress = AudioObjectPropertyAddress( | |
| mSelector: AudioObjectPropertySelector(kAudioHardwarePropertyDevices), | |
| mScope: AudioObjectPropertyScope(kAudioObjectPropertyScopeGlobal), | |
| mElement: AudioObjectPropertyElement(kAudioObjectPropertyElementMaster)) | |
| _ = AudioObjectGetPropertyDataSize(AudioObjectID(kAudioObjectSystemObject), &propertyAddress, 0, nil, &propertySize) | |
| return propertySize / UInt32(MemoryLayout<AudioDeviceID>.size) | |
| } | |
| private static func getNumberOfSubDevices(deviceID: AudioDeviceID) -> UInt32 { | |
| var propertySize: UInt32 = 0 | |
| var propertyAddress = AudioObjectPropertyAddress( | |
| mSelector: AudioObjectPropertySelector(kAudioAggregateDevicePropertyActiveSubDeviceList), | |
| mScope: AudioObjectPropertyScope(kAudioObjectPropertyScopeGlobal), | |
| mElement: AudioObjectPropertyElement(kAudioObjectPropertyElementMaster)) | |
| _ = AudioObjectGetPropertyDataSize(deviceID, &propertyAddress, 0, nil, &propertySize) | |
| return propertySize / UInt32(MemoryLayout<AudioDeviceID>.size) | |
| } | |
| private static func getDeviceName(deviceID: AudioDeviceID) -> String { | |
| var propertySize = UInt32(MemoryLayout<CFString>.size) | |
| var propertyAddress = AudioObjectPropertyAddress( | |
| mSelector: AudioObjectPropertySelector(kAudioDevicePropertyDeviceNameCFString), | |
| mScope: AudioObjectPropertyScope(kAudioObjectPropertyScopeGlobal), | |
| mElement: AudioObjectPropertyElement(kAudioObjectPropertyElementMaster)) | |
| var result: CFString = "" as CFString | |
| AudioObjectGetPropertyData(deviceID, &propertyAddress, 0, nil, &propertySize, &result) | |
| return result as String | |
| } | |
| private static func getAllDevices() -> [AudioDeviceID] { | |
| let devicesCount = getNumberOfDevices() | |
| var devices = [AudioDeviceID](repeating: 0, count: Int(devicesCount)) | |
| var propertyAddress = AudioObjectPropertyAddress( | |
| mSelector: AudioObjectPropertySelector(kAudioHardwarePropertyDevices), | |
| mScope: AudioObjectPropertyScope(kAudioObjectPropertyScopeGlobal), | |
| mElement: AudioObjectPropertyElement(kAudioObjectPropertyElementMaster)) | |
| var devicesSize = devicesCount * UInt32(MemoryLayout<UInt32>.size) | |
| AudioObjectGetPropertyData(AudioObjectID(kAudioObjectSystemObject), &propertyAddress, 0, nil, &devicesSize, &devices) | |
| return devices | |
| } | |
| } |
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Thanks a lot for this!