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Camera TorchControl shared usage registry setting

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The OEM-set AllowTorchControlSharing registry value enables OEMs to configure the Camera pipeline to allow access for TorchControl from Windows.Media.Capture.MediaCapture instance that has been initialized as MediaCaptureSharingMode.SharedReadOnly mode.

This can be done for example to allow utility app to control a flashlight feature while not preventing other apps to access the same underlying camera device.

Value (DWORD) Explanation
0 or AllowTorchControlSharing value not existing TorchControl will not be allowed from shared mode MediaCapture instance
1 TorchControl will be allowed from shared mode MediaCapture instance

AllowTorchControlSharing registry value location:

  • OEMs should create a new registry value AllowTorchControlSharing (DWORD) and set it to 1 to allow shared mode control.

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\OEM\Device\Capture

    To set the AllowTorchControlSharing registry value on a machine, the following command can be used from an elevated command prompt:

    Konsoll 
    reg add "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\OEM\Device\Capture" /v "AllowTorchControlSharing" /t REG_DWORD /d 1 /f

    On a 64-bit OS the value can also be added to Wow6432Node path in registry: HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\OEM\Device\Capture

Remarks

This functionality is available starting in:

Windows 10 version KB article
19041.906 and 19042.906 KB8000842
18363.1533 KB5001396
17763.1911 KB5001384

  • By default this registry value does not exist.

  • TorchControl does not have an event mechanism to notify state changes thus by controlling the torch from multiple applications may cause the torch being in different state than one application thinks if the state was changed by another application.