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Maximum number of supported points in the tonemap curve that can be used for CaptureRequest.TonemapCurve.
If the actual number of points provided by the application (in CaptureRequest.TonemapCurve*) is less than this maximum, the camera device will resample the curve to its internal representation, using linear interpolation.
The output curves in the result metadata may have a different number of points than the input curves, and will represent the actual hardware curves used as closely as possible when linearly interpolated.
Optional - This value may be null on some devices.
Full capability - Present on all camera devices that report being CameraMetadata.INFO_SUPPORTED_HARDWARE_LEVEL_FULL devices in the CameraCharacteristics.InfoSupportedHardwareLevel key