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Code Issues Releases Wiki Activity

Merge pull request #12 from ad/master

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+ listener for changes of sytem volume
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Serg 2018-04-14 01:42:39 +07:00 committed by GitHub
commit aba1aea334
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1 changed files with 52 additions and 2 deletions
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54
MTMR/VolumeViewController.swift
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@ -16,6 +16,39 @@ class VolumeViewController: NSCustomTouchBarItem {
}
self.view = sliderItem
var forPropertyAddress = AudioObjectPropertyAddress(
mSelector: kAudioHardwareServiceDeviceProperty_VirtualMasterVolume,
mScope: kAudioDevicePropertyScopeOutput,
mElement: kAudioObjectPropertyElementMaster)
addListenerBlock(listenerBlock: audioObjectPropertyListenerBlock,
onAudioObjectID: defaultDeviceID,
forPropertyAddress: &forPropertyAddress)
}
func addListenerBlock( listenerBlock: @escaping AudioObjectPropertyListenerBlock, onAudioObjectID: AudioObjectID, forPropertyAddress: UnsafePointer<AudioObjectPropertyAddress>) {
if (kAudioHardwareNoError != AudioObjectAddPropertyListenerBlock(onAudioObjectID, forPropertyAddress, nil, listenerBlock)) {
print("Error calling: AudioObjectAddPropertyListenerBlock") }
}
func audioObjectPropertyListenerBlock (numberAddresses: UInt32, addresses: UnsafePointer<AudioObjectPropertyAddress>) {
var index: UInt32 = 0
while index < numberAddresses {
let address: AudioObjectPropertyAddress = addresses[Int(index)]
switch address.mSelector {
case kAudioHardwareServiceDeviceProperty_VirtualMasterVolume:
DispatchQueue.main.async {
self.sliderItem.floatValue = self.getInputGain() * 100
}
default:
print("We didn't expect this!")
}
index += 1
}
}
required init?(coder: NSCoder) {
@ -24,7 +57,7 @@ class VolumeViewController: NSCustomTouchBarItem {
@objc func sliderValueChanged(_ sender: Any) {
if let sliderItem = sender as? NSSlider {
setInputGain(Float32(sliderItem.intValue)/100.0)
_ = setInputGain(Float32(sliderItem.intValue)/100.0)
}
}
@ -52,13 +85,30 @@ class VolumeViewController: NSCustomTouchBarItem {
private func setInputGain(_ volume: Float32) -> OSStatus {
var inputVolume: Float32 = volume
if inputVolume == 0.0 {
_ = setMute( mute: 1)
} else {
_ = setMute( mute: 0)
}
let size: UInt32 = UInt32(MemoryLayout.size(ofValue: inputVolume))
var address: AudioObjectPropertyAddress = AudioObjectPropertyAddress()
address.mSelector = AudioObjectPropertySelector(kAudioHardwareServiceDeviceProperty_VirtualMasterVolume)
address.mScope = AudioObjectPropertyScope(kAudioDevicePropertyScopeOutput)
address.mElement = AudioObjectPropertyElement(kAudioObjectPropertyElementMaster)
address.mSelector = AudioObjectPropertySelector(kAudioHardwareServiceDeviceProperty_VirtualMasterVolume)
return AudioObjectSetPropertyData(defaultDeviceID, &address, 0, nil, size, &inputVolume)
}
private func setMute( mute: Int) -> OSStatus {
var muteVal: Int = mute
var address: AudioObjectPropertyAddress = AudioObjectPropertyAddress()
address.mSelector = AudioObjectPropertySelector(kAudioDevicePropertyMute)
let size: UInt32 = UInt32(MemoryLayout.size(ofValue: muteVal))
address.mScope = AudioObjectPropertyScope(kAudioDevicePropertyScopeOutput)
address.mElement = AudioObjectPropertyElement(kAudioObjectPropertyElementMaster)
return AudioObjectSetPropertyData(defaultDeviceID, &address, 0, nil, size, &muteVal)
}
}
class CustomSliderCell: NSSliderCell {