Support for manual camera controls (ISO, shutter speed, white balance, aperture)

[noho501]

Hi Pedro,

Currently, I’m using Camera2ApiManager and Camera2Source for video input, but I’ve noticed that the library doesn’t expose manual camera controls such as:

• ISO (SENSOR_SENSITIVITY)
• Shutter speed / exposure time (SENSOR_EXPOSURE_TIME)
• White balance (CONTROL_AWB_MODE, COLOR_CORRECTION_GAINS)
• Aperture (LENS_APERTURE — if supported by the device)

It would be great if we could set these parameters manually, for example:

val cameraManager = genericStream.videoSource
cameraManager.setManualISO(800)
cameraManager.setExposureTime(10_000_000L)
cameraManager.setWhiteBalance(RggbChannelVector(1.5f, 1.0f, 1.0f, 1.5f))

Currently, Camera2ApiManager handles all the CaptureRequest.Builder setup internally, so it’s not possible to modify the request before starting the repeating request.

Would it be possible to open or make applyRequest public (in [Camera2ApiManager.kt](https://github.com/pedroSG94/RootEncoder/blob/master/encoder/src/main/java/com/pedro/encoder/input/video/Camera2ApiManager.kt)) or provide a callback/hook that allows developers to adjust the CaptureRequest.Builder before applying it?

Something like:

cameraManager.setCustomRequestCallback { builder ->
    builder.set(CaptureRequest.SENSOR_SENSITIVITY, 800)
    builder.set(CaptureRequest.SENSOR_EXPOSURE_TIME, 10_000_000L)
}

That would make it possible to extend the library for professional or custom camera use cases (e.g. manual exposure control in live streaming apps).

Thanks for your great work and for considering this request!

[noho501]

Hi @pedroSG94 could you help me check it?

Thanks and best regards

[pedroSG94]

Hello,

setCustomRequest is now available in the last commit of master branch:
660cd2f

[pedroSG94]

I did a new release with this change. You can use the library version 2.6.6

[noho501]

Thank you so much