diff options
| author | Jacopo Mondi <jacopo.mondi@ideasonboard.com> | 2023-05-29 14:39:26 +0200 |
|---|---|---|
| committer | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2023-06-06 18:17:35 +0300 |
| commit | ea93e7899fbfbc34dec3cdb08aca8ac9a51d414b (patch) | |
| tree | 818aaa25376befa02a1b68ab3f341608ac074451 /src/ipa/rkisp1/algorithms/agc.cpp | |
| parent | db86713ec17978cd4d42b74cece5be34aaa6a693 (diff) | |
ipa: rkisp1: agc: Restore minimum analogue gain limit
Commit a3178dd0391f ("ipa: rkisp1: agc: drop hard-coded analogue gain range")
removed both minimum and maximum limits for the analogue gain value.
However, as some sensors can potentially have a minimum gain lower than
1.0, restore the check for the minimum limit.
Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Diffstat (limited to 'src/ipa/rkisp1/algorithms/agc.cpp')
| -rw-r--r-- | src/ipa/rkisp1/algorithms/agc.cpp | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/src/ipa/rkisp1/algorithms/agc.cpp b/src/ipa/rkisp1/algorithms/agc.cpp index a4e5500e..e5aeb342 100644 --- a/src/ipa/rkisp1/algorithms/agc.cpp +++ b/src/ipa/rkisp1/algorithms/agc.cpp @@ -36,6 +36,9 @@ namespace ipa::rkisp1::algorithms { LOG_DEFINE_CATEGORY(RkISP1Agc) +/* Minimum limit for analogue gain value */ +static constexpr double kMinAnalogueGain = 1.0; + /* \todo Honour the FrameDurationLimits control instead of hardcoding a limit */ static constexpr utils::Duration kMaxShutterSpeed = 60ms; @@ -254,7 +257,8 @@ void Agc::computeExposure(IPAContext &context, IPAFrameContext &frameContext, utils::Duration maxShutterSpeed = std::min(configuration.sensor.maxShutterSpeed, kMaxShutterSpeed); - double minAnalogueGain = configuration.sensor.minAnalogueGain; + double minAnalogueGain = std::max(configuration.sensor.minAnalogueGain, + kMinAnalogueGain); double maxAnalogueGain = configuration.sensor.maxAnalogueGain; /* Consider within 1% of the target as correctly exposed. */ |