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authorNaushir Patuck <naush@raspberrypi.com>2020-04-24 11:46:57 +0100
committerLaurent Pinchart <laurent.pinchart@ideasonboard.com>2020-04-27 20:18:08 +0300
commitfa77a02c0a099ad02ed55935bdbe8cd441a8d893 (patch)
tree8290bd44507f8ed45ab9cc465a86941c39b1f68a /utils/ipu3
parent47d09a13b3acead2cd6007d6b6022931756c9ae7 (diff)
libcamera: controls: Updates to gain and exposure controls
Rename: ManualExposure -> ExposureTime ManualGain -> AnalogueGain Use micro-seconds units for ExposureTime. This is changed from milli- seconds. The latter would not allow very low exposure times. AnalogueGain switch to use a float to allow fractional gain adjustments. Update the uvcvideo pipeline handler to use the new exposure and gain units. For ExposureTime, UVC uses units of 100 micro-seconds, so map the values before setting V4L2_CID_EXPOSURE_ABSOLUTE. For AnalogueGain, UVC has no explicit gain units, so map the default gain value to 1.0 and linearly scale to the requested value. Signed-off-by: Naushir Patuck <naush@raspberrypi.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
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