How do I get the process that is playing audio? Topic is solved

[crocodile]

How do I get the process that is playing audio?

I have multiple music players, but I struggle with how to control them. I need to know which process is currently playing so that I can call the appropriate control script based on the process name.

[lmstearn]

Take a look at this thread, there's also VIsta Audio which uses IControlChangeNotify.
If only sound devices had a "busy" flag incremented by each process playing it, much easier - there may be a few ideas in this SO answer re audio device property and state changes.

[crocodile]

Thank you. I managed to get all the processes that loaded the sound. But still need to figure out if it is playing or not.

Code: Select all

	DetectHiddenWindows True


	SoundPIDs() {
		PIDs := []

		IMMDeviceEnumerator := ComObjValue(ComObject("{BCDE0395-E52F-467C-8E3D-C4579291692E}", "{A95664D2-9614-4F35-A746-DE8DB63617E6}"))

		DllCall(NumGet(NumGet(IMMDeviceEnumerator, "uptr") + 4 * A_PtrSize, "uptr"), "UPtr", IMMDeviceEnumerator, "UInt", 0, "UInt", 1, "UPtrP", &IMMDevice := 0, "UInt")

		GUID := buffer(16)
		DllCall("Ole32.dll\CLSIDFromString", "Str", "{77AA99A0-1BD6-484F-8BC7-2C654C9A9B6F}", "UPtr", GUID)
		DllCall(NumGet(NumGet(IMMDevice, "uptr") + 3 * A_PtrSize, "uptr"), "UPtr", IMMDevice, "UPtr", GUID, "UInt", 23, "UPtr", 0, "UPtrP", &IAudioSessionManager2 := 0, "UInt")

		ObjRelease(IMMDevice)

		DllCall(NumGet(NumGet(IAudioSessionManager2, "uptr") + 5 * A_PtrSize, "uptr"), "UPtr", IAudioSessionManager2, "UPtrP", &IAudioSessionEnumerator := 0, "UInt")

		ObjRelease(IAudioSessionManager2)

		DllCall(NumGet(NumGet(IAudioSessionEnumerator, "uptr") + 3 * A_PtrSize, "uptr"), "UPtr", IAudioSessionEnumerator, "UIntP", &SessionCount := 0, "UInt")
		Loop SessionCount
		{
			DllCall(NumGet(NumGet(IAudioSessionEnumerator, "uptr") + 4 * A_PtrSize, "uptr"), "UPtr", IAudioSessionEnumerator, "Int", A_Index - 1, "UPtrP", &IAudioSessionControl := 0, "UInt")
			IAudioSessionControl2 := ComObjValue(ComObjQuery(IAudioSessionControl, "{BFB7FF88-7239-4FC9-8FA2-07C950BE9C6D}"))
			ObjRelease(IAudioSessionControl)

			DllCall(NumGet(NumGet(IAudioSessionControl2, "uptr") + 14 * A_PtrSize, "uptr"), "UPtr", IAudioSessionControl2, "UIntP", &PID := 0, "UInt")

			ISimpleAudioVolume := ComObjValue(ComObjQuery(IAudioSessionControl2, "{87CE5498-68D6-44E5-9215-6DA47EF883D8}"))

			DllCall(NumGet(NumGet(ISimpleAudioVolume, "uptr") + 4 * A_PtrSize, "uptr"), "UPtr", ISimpleAudioVolume, "FloatP", &Volume := 0, "UInt")
			if PID
			PIDs.push([PID, WinGetProcessPath("ahk_pid" PID), Volume])
			ObjRelease(IAudioSessionControl2)
		}
		ObjRelease(IAudioSessionEnumerator)
		ObjRelease(IMMDeviceEnumerator)

		return PIDs
	}

[lmstearn]

There's an answer here how to control sound out of applications with external program.
One rather inefficient way is to set up a sound recorder, and change the volume of the application (a little say 5-10%) using ideas from this or this.
If there is no difference in the recorded output, the app is not playing!

[crocodile]

Thanks, I didn't find a solution from AutoHotkey, but I tried to solve it from music software, for example foobar2000 can show play status in the title. But unfortunately not all software has this customizability.