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ipa: rpi: agc: Ignore stable region when exposure/gain set manually

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When a user is taking control of exposure and gain, setting them
manually, we set the AGC "stable region" to zero. This means that any
user changes, however small, will be applied, and they won't be
regarded as "too small to bother with".

Signed-off-by: David Plowman <david.plowman@raspberrypi.com>
Reviewed-by: Naushir Patuck <naush@raspberrypi.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
This commit is contained in:
David Plowman 2024-09-09 14:22:04 +01:00 • committed by Kieran Bingham
parent f75b8dd26f
commit 5c5bc85082
1 changed files with 5 additions and 2 deletions
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7
src/ipa/rpi/controller/rpi/agc_channel.cpp
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@ -883,11 +883,14 @@ void AgcChannel::filterExposure()
/*
* AGC adapts instantly if both shutter and gain are directly specified
* or we're in the startup phase.
* or we're in the startup phase. Also disable the stable region, because we want
* to reflect any user exposure/gain updates, however small.
*/
if ((status_.fixedShutter && status_.fixedAnalogueGain) ||
frameCount_ <= config_.startupFrames)
frameCount_ <= config_.startupFrames) {
speed = 1.0;
stableRegion = 0.0;
}
if (!filtered_.totalExposure) {
filtered_.totalExposure = target_.totalExposure;
} else if (filtered_.totalExposure * (1.0 - stableRegion) < target_.totalExposure &&