[PATCH 2/3] ipa: rkisp1: Alias lineDuration

[Kieran Bingham]

The configured line duration of the sensor is used frequently throughout
the AGC implementation.

It's available in the IPA context through the rather long:
  context.configuration.sensor.lineDuration

Take a copy of the lineDuration early in the call and replace the two
current usages of the reference with the shorter copy to manage line
length and ease readibility.

Signed-off-by: Kieran Bingham <kieran.bingham at ideasonboard.com>
---
 src/ipa/rkisp1/algorithms/agc.cpp | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/ipa/rkisp1/algorithms/agc.cpp b/src/ipa/rkisp1/algorithms/agc.cpp
index 33f902862c4a..e23ab120b3e2 100644
--- a/src/ipa/rkisp1/algorithms/agc.cpp
+++ b/src/ipa/rkisp1/algorithms/agc.cpp
@@ -400,6 +400,8 @@ void Agc::process(IPAContext &context, [[maybe_unused]] const uint32_t frame,
 		return;
 	}
 
+	utils::Duration lineDuration = context.configuration.sensor.lineDuration;
+
 	/*
 	 * \todo Verify that the exposure and gain applied by the sensor for
 	 * this frame match what has been requested. This isn't a hard
@@ -429,8 +431,7 @@ void Agc::process(IPAContext &context, [[maybe_unused]] const uint32_t frame,
 	 * The Agc algorithm needs to know the effective exposure value that was
 	 * applied to the sensor when the statistics were collected.
 	 */
-	utils::Duration exposureTime = context.configuration.sensor.lineDuration
-				       * frameContext.sensor.exposure;
+	utils::Duration exposureTime = lineDuration * frameContext.sensor.exposure;
 	double analogueGain = frameContext.sensor.gain;
 	utils::Duration effectiveExposureValue = exposureTime * analogueGain;
 
@@ -447,7 +448,7 @@ void Agc::process(IPAContext &context, [[maybe_unused]] const uint32_t frame,
 
 	IPAActiveState &activeState = context.activeState;
 	/* Update the estimated exposure and gain. */
-	activeState.agc.automatic.exposure = shutterTime / context.configuration.sensor.lineDuration;
+	activeState.agc.automatic.exposure = shutterTime / lineDuration;
 	activeState.agc.automatic.gain = aGain;
 
 	fillMetadata(context, frameContext, metadata);
-- 
2.34.1