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ipa: rkisp1: Alias lineDuration

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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@ideasonboard.com>
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
This commit is contained in:
Kieran Bingham 2024-10-14 16:47:46 +01:00 • committed by Paul Elder
parent 443ac36e12
commit 2abfcac1c3
1 changed files with 4 additions and 4 deletions
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8
src/ipa/rkisp1/algorithms/agc.cpp
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@ -470,6 +470,8 @@ void Agc::process(IPAContext &context, [[maybe_unused]] const uint32_t frame,
return;
}
const 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
@ -519,8 +521,7 @@ 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;
@ -537,8 +538,7 @@ 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 = newExposureTime
/ context.configuration.sensor.lineDuration;
activeState.agc.automatic.exposure = newExposureTime / lineDuration;
activeState.agc.automatic.gain = aGain;
fillMetadata(context, frameContext, metadata);