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authorDavid Plowman <david.plowman@raspberrypi.com>2023-07-28 14:37:00 +0100
committerKieran Bingham <kieran.bingham@ideasonboard.com>2023-09-04 17:47:35 +0100
commit250565b5e8848c80443422d9e44c0693aa381c81 (patch)
tree98f218b81bfc3312d0b5a7adfbf69991bbee5d64 /src/ipa/rpi/controller
parent84b6327789fcf5be37a990d5be27f305e8514621 (diff)
ipa: rpi: agc: Split AgcStatus into AgcStatus and AgcPrepareStatus
The Agc::process() function returns an AgcStatus object in the metadata as before, but Agc::prepare() is changed to return the values it computes in a separate AgcPrepareStatus object (under the new tag "agc.prepare_status"). The "digitalGain" and "locked" fields are moved from AgcStatus to AgcPrepareStatus. This will be useful going forward as we can be more flexible about the order in which prepare() and process() are called, without them trampling on each other's results. Signed-off-by: David Plowman <david.plowman@raspberrypi.com> Reviewed-by: Naushir Patuck <naush@raspberrypi.com> Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Diffstat (limited to 'src/ipa/rpi/controller')
-rw-r--r--src/ipa/rpi/controller/agc_status.h9
-rw-r--r--src/ipa/rpi/controller/rpi/agc.cpp20
-rw-r--r--src/ipa/rpi/controller/rpi/agc.h2
3 files changed, 19 insertions, 12 deletions
diff --git a/src/ipa/rpi/controller/agc_status.h b/src/ipa/rpi/controller/agc_status.h
index 6c112e76..597eddd7 100644
--- a/src/ipa/rpi/controller/agc_status.h
+++ b/src/ipa/rpi/controller/agc_status.h
@@ -11,8 +11,10 @@
#include <libcamera/base/utils.h>
/*
- * The AGC algorithm should post the following structure into the image's
- * "agc.status" metadata.
+ * The AGC algorithm process method should post an AgcStatus into the image
+ * metadata under the tag "agc.status".
+ * The AGC algorithm prepare method should post an AgcPrepareStatus instead
+ * under "agc.prepare_status".
*/
/*
@@ -34,6 +36,9 @@ struct AgcStatus {
int floatingRegionEnable;
libcamera::utils::Duration fixedShutter;
double fixedAnalogueGain;
+};
+
+struct AgcPrepareStatus {
double digitalGain;
int locked;
};
diff --git a/src/ipa/rpi/controller/rpi/agc.cpp b/src/ipa/rpi/controller/rpi/agc.cpp
index 6087fc60..7b02972a 100644
--- a/src/ipa/rpi/controller/rpi/agc.cpp
+++ b/src/ipa/rpi/controller/rpi/agc.cpp
@@ -419,11 +419,13 @@ void Agc::prepare(Metadata *imageMetadata)
{
Duration totalExposureValue = status_.totalExposureValue;
AgcStatus delayedStatus;
+ AgcPrepareStatus prepareStatus;
if (!imageMetadata->get("agc.delayed_status", delayedStatus))
totalExposureValue = delayedStatus.totalExposureValue;
- status_.digitalGain = 1.0;
+ prepareStatus.digitalGain = 1.0;
+ prepareStatus.locked = false;
if (status_.totalExposureValue) {
/* Process has run, so we have meaningful values. */
@@ -432,23 +434,23 @@ void Agc::prepare(Metadata *imageMetadata)
Duration actualExposure = deviceStatus.shutterSpeed *
deviceStatus.analogueGain;
if (actualExposure) {
- status_.digitalGain = totalExposureValue / actualExposure;
+ double 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?
*/
- status_.digitalGain = std::max(1.0, std::min(status_.digitalGain, 4.0));
+ prepareStatus.digitalGain = std::max(1.0, std::min(digitalGain, 4.0));
LOG(RPiAgc, Debug) << "Actual exposure " << actualExposure;
- LOG(RPiAgc, Debug) << "Use digitalGain " << status_.digitalGain;
+ LOG(RPiAgc, Debug) << "Use digitalGain " << prepareStatus.digitalGain;
LOG(RPiAgc, Debug) << "Effective exposure "
- << actualExposure * status_.digitalGain;
+ << actualExposure * prepareStatus.digitalGain;
/* Decide whether AEC/AGC has converged. */
- updateLockStatus(deviceStatus);
+ prepareStatus.locked = updateLockStatus(deviceStatus);
}
} else
LOG(RPiAgc, Warning) << name() << ": no device metadata";
- imageMetadata->set("agc.status", status_);
+ imageMetadata->set("agc.prepare_status", prepareStatus);
}
}
@@ -486,7 +488,7 @@ void Agc::process(StatisticsPtr &stats, Metadata *imageMetadata)
writeAndFinish(imageMetadata, desaturate);
}
-void Agc::updateLockStatus(DeviceStatus const &deviceStatus)
+bool Agc::updateLockStatus(DeviceStatus const &deviceStatus)
{
const double errorFactor = 0.10; /* make these customisable? */
const int maxLockCount = 5;
@@ -522,7 +524,7 @@ void Agc::updateLockStatus(DeviceStatus const &deviceStatus)
lastTargetExposure_ = status_.targetExposureValue;
LOG(RPiAgc, Debug) << "Lock count updated to " << lockCount_;
- status_.locked = lockCount_ == maxLockCount;
+ return lockCount_ == maxLockCount;
}
void Agc::housekeepConfig()
diff --git a/src/ipa/rpi/controller/rpi/agc.h b/src/ipa/rpi/controller/rpi/agc.h
index b7122de3..aaf77c8f 100644
--- a/src/ipa/rpi/controller/rpi/agc.h
+++ b/src/ipa/rpi/controller/rpi/agc.h
@@ -85,7 +85,7 @@ public:
void process(StatisticsPtr &stats, Metadata *imageMetadata) override;
private:
- void updateLockStatus(DeviceStatus const &deviceStatus);
+ bool updateLockStatus(DeviceStatus const &deviceStatus);
AgcConfig config_;
void housekeepConfig();
void fetchCurrentExposure(Metadata *imageMetadata);