ipa: ipu3: convert AGC to the new algorithm interface

In preparation for using the AGC through the new algorithm interfaces,
convert the existing code to use the new function types.

Now that the process call is rewritten, re-enable the compiler flag to
warn when a function declaration hides virtual functions from a base class
(-Woverloaded-virtual).

We never use converged_ so remove its declaration. The controls may not
need to be updated at each call, but it should be decided on the context
side and not by a specific call by using a lock status in the Agc
structure for instance.

As the params_ local variable is not useful anymore, remove it here
too.

Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

1 files changed, 11 insertions, 13 deletions

diff --git a/src/ipa/ipu3/ipu3_agc.cpp b/src/ipa/ipu3/ipu3_agc.cpp
index 20c2d3b4..1c156b89 100644
--- a/src/ipa/ipu3/ipu3_agc.cpp
+++ b/src/ipa/ipu3/ipu3_agc.cpp
@@ -51,20 +51,21 @@ static constexpr double kEvGainTarget = 0.5;
 static constexpr uint8_t kCellSize = 8;
 
 IPU3Agc::IPU3Agc()
-	: frameCount_(0), lastFrame_(0), converged_(false),
-	  updateControls_(false), iqMean_(0.0),
-	  lineDuration_(0s), maxExposureTime_(0s),
-	  prevExposure_(0s), prevExposureNoDg_(0s),
+	: frameCount_(0), lastFrame_(0), iqMean_(0.0), lineDuration_(0s),
+	  maxExposureTime_(0s), prevExposure_(0s), prevExposureNoDg_(0s),
 	  currentExposure_(0s), currentExposureNoDg_(0s)
 {
 }
 
-void IPU3Agc::initialise(struct ipu3_uapi_grid_config &bdsGrid, const IPACameraSensorInfo &sensorInfo)
+int IPU3Agc::configure(IPAContext &context, const IPAConfigInfo &configInfo)
 {
-	aeGrid_ = bdsGrid;
+	aeGrid_ = context.configuration.grid.bdsGrid;
 
-	lineDuration_ = sensorInfo.lineLength * 1.0s / sensorInfo.pixelRate;
+	lineDuration_ = configInfo.sensorInfo.lineLength * 1.0s
+		      / configInfo.sensorInfo.pixelRate;
 	maxExposureTime_ = kMaxExposure * lineDuration_;
+
+	return 0;
 }
 
 void IPU3Agc::processBrightness(const ipu3_uapi_stats_3a *stats)
@@ -144,8 +145,6 @@ void IPU3Agc::filterExposure()
 
 void IPU3Agc::lockExposureGain(uint32_t &exposure, double &gain)
 {
-	updateControls_ = false;
-
 	/* Algorithm initialization should wait for first valid frames */
 	/* \todo - have a number of frames given by DelayedControls ?
 	 * - implement a function for IIR */
@@ -155,7 +154,6 @@ void IPU3Agc::lockExposureGain(uint32_t &exposure, double &gain)
 	/* Are we correctly exposed ? */
 	if (std::abs(iqMean_ - kEvGainTarget * knumHistogramBins) <= 1) {
 		LOG(IPU3Agc, Debug) << "!!! Good exposure with iqMean = " << iqMean_;
-		converged_ = true;
 	} else {
 		double newGain = kEvGainTarget * knumHistogramBins / iqMean_;
 
@@ -178,20 +176,20 @@ void IPU3Agc::lockExposureGain(uint32_t &exposure, double &gain)
 			exposure = std::clamp(static_cast<uint32_t>(exposure * currentExposure_ / currentExposureNoDg_), kMinExposure, kMaxExposure);
 			newExposure = currentExposure_ / exposure;
 			gain = std::clamp(static_cast<uint32_t>(gain * currentExposure_ / newExposure), kMinGain, kMaxGain);
-			updateControls_ = true;
 		} else if (currentShutter >= maxExposureTime_) {
 			gain = std::clamp(static_cast<uint32_t>(gain * currentExposure_ / currentExposureNoDg_), kMinGain, kMaxGain);
 			newExposure = currentExposure_ / gain;
 			exposure = std::clamp(static_cast<uint32_t>(exposure * currentExposure_ / newExposure), kMinExposure, kMaxExposure);
-			updateControls_ = true;
 		}
 		LOG(IPU3Agc, Debug) << "Adjust exposure " << exposure * lineDuration_ << " and gain " << gain;
 	}
 	lastFrame_ = frameCount_;
 }
 
-void IPU3Agc::process(const ipu3_uapi_stats_3a *stats, uint32_t &exposure, double &gain)
+void IPU3Agc::process(IPAContext &context, const ipu3_uapi_stats_3a *stats)
 {
+	uint32_t &exposure = context.frameContext.agc.exposure;
+	double &gain = context.frameContext.agc.gain;
 	processBrightness(stats);
 	lockExposureGain(exposure, gain);
 	frameCount_++;