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#Requires AutoHotkey v2.0-a136-feda41f4
; http://www.daveamenta.com/2011-05/programmatically-or-command-line-change-the-default-sound-playback-device-in-windows-7/
; https://web.archive.org/web/20190317012739/http://www.daveamenta.com/2011-05/programmatically-or-command-line-change-the-default-sound-playback-device-in-windows-7/
List := EnumAudioEndpoints()
Devices := ""
for Device in List
Devices .= Format("{} ({})`n`n", Device["Name"], Device["ID"])
MsgBox(Devices)
F6::
{
SetDefaultEndpoint(GetDeviceID(List, "DENON-AVR (NVIDIA High Definition Audio)"))
SetDefaultEndpoint(GetDeviceID(List, "Microphone (Yeti Stereo Microphone)"))
}
F7::
{
SetDefaultEndpoint(GetDeviceID(List, "Headset Earphone (3- CORSAIR VOID ELITE Wireless Gaming Dongle)"))
SetDefaultEndpoint(GetDeviceID(List, "Headset Microphone (3- CORSAIR VOID ELITE Wireless Gaming Dongle)"))
}
/*
Generates a collection of audio endpoint devices that meet the specified criteria.
Parameters:
DataFlow:
The data-flow direction for the endpoint devices in the collection.
0 Audio rendering stream. Audio data flows from the application to the audio endpoint device, which renders the stream.
1 Audio capture stream. Audio data flows from the audio endpoint device that captures the stream, to the application.
2 Audio rendering or capture stream. Audio data can flow either from the application to the audio endpoint device, or from the audio endpoint device to the application.
StateMask:
The state or states of the endpoints that are to be included in the collection.
1 Active. The audio adapter that connects to the endpoint device is present and enabled. In addition, if the endpoint device plugs into a jack on the adapter, then the endpoint device is plugged in.
2 Disabled. The user has disabled the device in the Windows multimedia control panel (Mmsys.cpl).
4 Not present. The audio adapter that connects to the endpoint device has been removed or disabled.
8 Unplugged. The audio adapter that contains the jack for the endpoint device is present and enabled, but the endpoint device is not plugged into the jack. Only a device with jack-presence detection can be in this state.
Return value:
Returns an array of Map objects with the following keys:
ID Endpoint ID string that identifies the audio endpoint device.
Name The friendly name of the endpoint device.
*/
EnumAudioEndpoints(DataFlow := 2, StateMask := 1)
{
List := []
; IMMDeviceEnumerator interface.
; https://docs.microsoft.com/en-us/windows/win32/api/mmdeviceapi/nn-mmdeviceapi-immdeviceenumerator
IMMDeviceEnumerator := ComObject("{BCDE0395-E52F-467C-8E3D-C4579291692E}", "{A95664D2-9614-4F35-A746-DE8DB63617E6}")
; IMMDeviceEnumerator::EnumAudioEndpoints method.
; https://docs.microsoft.com/en-us/windows/win32/api/mmdeviceapi/nf-mmdeviceapi-immdeviceenumerator-enumaudioendpoints
ComCall(3, IMMDeviceEnumerator, "UInt", DataFlow, "UInt", StateMask, "UPtrP", &IMMDeviceCollection:=0)
; IMMDeviceCollection::GetCount method.
; https://docs.microsoft.com/en-us/windows/win32/api/mmdeviceapi/nf-mmdeviceapi-immdevicecollection-getcount
ComCall(3, IMMDeviceCollection, "UIntP", &DevCount:=0) ; Retrieves a count of the devices in the device collection.
loop DevCount
{
List.Push(Device := Map())
; IMMDeviceCollection::Item method.
; https://docs.microsoft.com/en-us/windows/win32/api/mmdeviceapi/nf-mmdeviceapi-immdevicecollection-item
ComCall(4, IMMDeviceCollection, "UInt", A_Index-1, "UPtrP", &IMMDevice:=0)
; IMMDevice::GetId method.
; https://docs.microsoft.com/en-us/windows/win32/api/mmdeviceapi/nf-mmdeviceapi-immdevice-getid
ComCall(5, IMMDevice, "PtrP", &pBuffer:=0)
Device["ID"] := StrGet(pBuffer)
DllCall("Ole32.dll\CoTaskMemFree", "UPtr", pBuffer)
; MMDevice::OpenPropertyStore method.
; https://docs.microsoft.com/en-us/windows/win32/api/mmdeviceapi/nf-mmdeviceapi-immdevice-openpropertystore
ComCall(4, IMMDevice, "UInt", 0x00000000, "UPtrP", &IPropertyStore:=0)
Device["Name"] := GetDeviceProp(IPropertyStore, "{A45C254E-DF1C-4EFD-8020-67D146A850E0}", 14)
ObjRelease(IPropertyStore)
ObjRelease(IMMDevice)
}
ObjRelease(IMMDeviceCollection)
return List
}
/*
Set default audio render endpoint.
Role:
0x1 Default Device.
0x2 Default Communication Device.
*/
SetDefaultEndpoint(DeviceID, Role := 3)
{
; Undocumented COM-interface IPolicyConfig.
IPolicyConfig := ComObject("{870AF99C-171D-4F9E-AF0D-E63Df40c2BC9}", "{F8679F50-850A-41CF-9C72-430F290290C8}")
if (Role & 0x1)
ComCall(13, IPolicyConfig, "Str", DeviceID, "Int", 0) ; Default Device
if (Role & 0x2)
ComCall(13, IPolicyConfig, "Str", DeviceID, "Int", 2) ; Default Communication Device
}
/*
Device Properties (Core Audio APIs)
https://docs.microsoft.com/en-us/windows/win32/coreaudio/device-properties
026E516E-B814-414B-83CD-856D6FEF4822, 2 The friendly name of the audio adapter to which the endpoint device is attached.
A45C254E-DF1C-4EFD-8020-67D146A850E0, 2 The device description of the endpoint device.
A45C254E-DF1C-4EFD-8020-67D146A850E0,14 The friendly name of the endpoint device.
*/
InitDeviceProp(clsid, n)
{
clsid := CLSIDFromString(clsid, Buffer(16+4))
NumPut("Int", n, clsid, 16)
return clsid
}
GetDeviceProp(ptr, clsid, n)
{
; IPropertyStore::GetValue method.
; https://docs.microsoft.com/en-us/windows/win32/api/propsys/nf-propsys-ipropertystore-getvalue
ComCall(5, ptr, "Ptr", InitDeviceProp(clsid, n), "Ptr", pvar := PropVariant())
return String(pvar)
}
GetDeviceID(list, name)
{
for device in list
if InStr(device["Name"], name)
return device["ID"]
throw
}
CLSIDFromString(Str, Buffer := 0)
{
if (!Buffer)
Buffer := Buffer(16)
DllCall("Ole32\CLSIDFromString", "Str", Str, "Ptr", Buffer, "HRESULT")
return Buffer
}
class PropVariant
{
__New()
{
this.buffer := Buffer(A_PtrSize == 4 ? 16 : 24)
this.ptr := this.buffer.ptr
this.size := this.buffer.size
}
__Delete()
{
DllCall("Ole32\PropVariantClear", "Ptr", this.ptr, "HRESULT")
}
ToString()
{
return StrGet(NumGet(this.ptr, 8, "UPtr")) ; LPWSTR PROPVARIANT.pwszVal
}
}
