RecordingScreen.kt

@Composable
internal fun RecordingScreen(viewModel: RecordingViewModel) {
    val state by viewModel.state.collectAsState()
    val context = LocalContext.current
    val lifecycleOwner = LocalLifecycleOwner.current
    
    val listener = remember {
        object : VideoCaptureManager.Listener {
            override fun onInitialised(cameraLensInfo: HashMap<Int, CameraInfo>) {
                //TODO: Dispatch an Event to the viewModel to update State with CameraInfo
            }
        }
    }

    val captureManager = remember {
        VideoCaptureManager.Builder(context)
            .registerLifecycleOwner(lifecycleOwner)
            .create()
            .apply { this.listener = listener }
    }
    
    CompositionLocalProvider(LocalVideoCaptureManager provides captureManager) {
        CameraPreview(lens = state.lens, torchState = state.torchState)
    }
}

@Composable
private fun CameraPreview(lens: Int, @TorchState.State torchState: Int) {
    val captureManager = LocalVideoCaptureManager.current
    BoxWithConstraints {
        AndroidView(
            factory = {
                captureManager.showPreview(
                    PreviewState(
                        cameraLens = lens,
                        torchState = torchState,
                        size = Size(this.minWidth.value.toInt(), this.maxHeight.value.toInt())
                    )
                )
            },
            modifier = Modifier.fillMaxSize(),
            update = {
                captureManager.updatePreview(PreviewState(cameraLens = lens, torchState = torchState), it)
            }
        )
    }
}