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Drop the first frame after the window change was requested to guarantee
that sharpness level was calculated for the new window.
Signed-off-by: Daniel Semkowicz <dse@thaumatec.com>
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With 30fps stream, lens movement takes more time than one frame. Skip
few frames to allow lens to stabilize before calculating next contrast
value.
Signed-off-by: Daniel Semkowicz <dse@thaumatec.com>
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Allow manually setting auto focus window. Currently only one window is
enabled, but ISP allows up to three of them.
Signed-off-by: Daniel Semkowicz <dse@thaumatec.com>
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Rockchip ISP AF block allows calculation of sharpness and luminance
in up to three user defined windows. If no windows are set, there are
some default settings applied for the first window and exposed through
the driver. For each frame, use the sharpness value calculated for this
default window and feed the hill climbing algorithm with them. Then set
the lens position to value calculated by the algorithm.
Signed-off-by: Daniel Semkowicz <dse@thaumatec.com>
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