From ac42f9278e9bd2c9e60f87322bf431a7c8a6c2c9 Mon Sep 17 00:00:00 2001 From: Naushir Patuck Date: Tue, 15 Nov 2022 09:07:55 +0000 Subject: 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 Reviewed-by: David Plowman Tested-by: David Plowman Reviewed-by: Kieran Bingham Signed-off-by: Laurent Pinchart --- src/ipa/raspberrypi/controller/rpi/agc.cpp | 10 ++++++++-- src/ipa/raspberrypi/raspberrypi.cpp | 11 +++++++++++ 2 files changed, 19 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? diff --git a/src/ipa/raspberrypi/raspberrypi.cpp b/src/ipa/raspberrypi/raspberrypi.cpp index 3157805c..0f914f84 100644 --- a/src/ipa/raspberrypi/raspberrypi.cpp +++ b/src/ipa/raspberrypi/raspberrypi.cpp @@ -1030,6 +1030,17 @@ void IPARPi::prepareISP(const ISPConfig &data) embeddedBuffer = it->second.planes()[0]; } + /* + * AGC wants to know the algorithm status from the time it actioned the + * sensor exposure/gain changes. So fetch it from the metadata list + * indexed by the IPA cookie returned, and put it in the current frame + * metadata. + */ + AgcStatus agcStatus; + RPiController::Metadata &delayedMetadata = rpiMetadata_[data.delayContext]; + if (!delayedMetadata.get("agc.status", agcStatus)) + rpiMetadata.set("agc.delayed_status", agcStatus); + /* * This may overwrite the DeviceStatus using values from the sensor * metadata, and may also do additional custom processing. -- cgit v1.2.1