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authorNaushir Patuck <naush@raspberrypi.com>2022-11-15 09:07:55 +0000
committerLaurent Pinchart <laurent.pinchart@ideasonboard.com>2022-11-29 17:16:54 +0200
commitac42f9278e9bd2c9e60f87322bf431a7c8a6c2c9 (patch)
treea100a6162226b16056baef5ba14ba4bc25fa112c /src/ipa/raspberrypi/controller/rpi/agc.cpp
parent546154b134338c4261885796f95d802c1f65520e (diff)
ipa: raspberrypi: agc: Fix digital gain calculation for manual mode
The digital gain calculation uses a total exposure value computed with the current AGC state. However, this is wrong in the case of manual shutter/gain controls, as the total exposure value used must be the value computed when the AGC sent the manual shutter/gain controls to the pipeline handler to action. To fix this, the IPA now adds the historical AgcStatus structure to the metadata (tagged with "agc.delayed_status"). This historical AgcStatus structure contains the total exposure value calculated when the AGC sent the manual shutter/gain controls to the pipeline handler. Signed-off-by: Naushir Patuck <naush@raspberrypi.com> Reviewed-by: David Plowman <david.plowman@raspberrypi.com> Tested-by: David Plowman <david.plowman@raspberrypi.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Diffstat (limited to 'src/ipa/raspberrypi/controller/rpi/agc.cpp')
-rw-r--r--src/ipa/raspberrypi/controller/rpi/agc.cpp10
1 files changed, 8 insertions, 2 deletions
diff --git a/src/ipa/raspberrypi/controller/rpi/agc.cpp b/src/ipa/raspberrypi/controller/rpi/agc.cpp
index a30e50c1..46dcc81a 100644
--- a/src/ipa/raspberrypi/controller/rpi/agc.cpp
+++ b/src/ipa/raspberrypi/controller/rpi/agc.cpp
@@ -403,6 +403,12 @@ void Agc::switchMode(CameraMode const &cameraMode,
void Agc::prepare(Metadata *imageMetadata)
{
+ Duration totalExposureValue = status_.totalExposureValue;
+ AgcStatus delayedStatus;
+
+ if (!imageMetadata->get("agc.delayed_status", delayedStatus))
+ totalExposureValue = delayedStatus.totalExposureValue;
+
status_.digitalGain = 1.0;
fetchAwbStatus(imageMetadata); /* always fetch it so that Process knows it's been done */
@@ -413,8 +419,8 @@ void Agc::prepare(Metadata *imageMetadata)
Duration actualExposure = deviceStatus.shutterSpeed *
deviceStatus.analogueGain;
if (actualExposure) {
- status_.digitalGain = status_.totalExposureValue / actualExposure;
- LOG(RPiAgc, Debug) << "Want total exposure " << status_.totalExposureValue;
+ status_.digitalGain = totalExposureValue / actualExposure;
+ LOG(RPiAgc, Debug) << "Want total exposure " << totalExposureValue;
/*
* Never ask for a gain < 1.0, and also impose
* some upper limit. Make it customisable?