On Samsung S10 I can't enable flash using front camera (both camera2 and legacy camera API return false when checking support of flash for this camera)
For example
Timber.d("flashSupport ${CameraUtil.isFlashAvailable(this, "0")}, ${CameraUtil.isFlashAvailable(this, "1")}")
"0" - id of back camera
"1" - id of front camera
output:
flashSupport true, false
fun isFlashAvailable(context: Context, cameraId: String): Boolean {
val characteristics = getCameraCharacteristics(context, cameraId)
return characteristics.get(CameraCharacteristics.FLASH_INFO_AVAILABLE) == true
}
So I can enable flash only for back camera but not for front camera? Why so? Samsung limits it and allows only for their system Camera app or is there something else?
From looking at the specs of the Samsung S10, it doesn't appear to have a front-facing flash unit?
MAIN CAMERA: Triple 12 MP, f/1.5-2.4, 26mm (wide), 1/2.55", 1.4µm, Dual Pixel PDAF, OIS 12 MP, f/2.4, 52mm (telephoto), 1/3.6", 1.0µm, AF, OIS, 2x optical zoom 16 MP, f/2.2, 12mm (ultrawide), 1/3.1", 1.0µm, Super Steady video
Features: LED flash, auto-HDR, panorama Video 4K@60fps (no EIS), 4K@30fps, 1080p@30/60/240fps, 720p@960fps, HDR10+, stereo sound rec., gyro-EIS & OIS
SELFIE CAMERA: Single 10 MP, f/1.9, 26mm (wide), 1/3", 1.22µm, Dual Pixel PDAF
Features: Dual video call, Auto-HDR Video 4K@30/60fps, 1080p@30fps
It's possible Samsung's camera app implements a 'flash' by turning the screen white and lighting up the user that way. If so, you can implement the same thing in your own app.
But the camera API only lists regular flash units with an LED or other strobe light.