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-rw-r--r--src/ipa/raspberrypi/controller/rpi/agc.cpp11
1 files changed, 5 insertions, 6 deletions
diff --git a/src/ipa/raspberrypi/controller/rpi/agc.cpp b/src/ipa/raspberrypi/controller/rpi/agc.cpp
index 868c30f0..ea0c82b5 100644
--- a/src/ipa/raspberrypi/controller/rpi/agc.cpp
+++ b/src/ipa/raspberrypi/controller/rpi/agc.cpp
@@ -28,8 +28,6 @@ LOG_DEFINE_CATEGORY(RPiAgc)
#define NAME "rpi.agc"
-static constexpr unsigned int PipelineBits = 13; /* seems to be a 13-bit pipeline */
-
int AgcMeteringMode::read(const libcamera::YamlObject &params)
{
const YamlObject &yamlWeights = params["weights"];
@@ -586,6 +584,7 @@ void Agc::fetchAwbStatus(Metadata *imageMetadata)
static double computeInitialY(StatisticsPtr &stats, AwbStatus const &awb,
double weights[], double gain)
{
+ constexpr unsigned int maxVal = 1 << Statistics::NormalisationFactorPow2;
/*
* Note how the calculation below means that equal weights give you
* "average" metering (i.e. all pixels equally important).
@@ -593,9 +592,9 @@ static double computeInitialY(StatisticsPtr &stats, AwbStatus const &awb,
double rSum = 0, gSum = 0, bSum = 0, pixelSum = 0;
for (unsigned int i = 0; i < stats->agcRegions.numRegions(); i++) {
auto &region = stats->agcRegions.get(i);
- double rAcc = std::min<double>(region.val.rSum * gain, ((1 << PipelineBits) - 1) * region.counted);
- double gAcc = std::min<double>(region.val.gSum * gain, ((1 << PipelineBits) - 1) * region.counted);
- double bAcc = std::min<double>(region.val.bSum * gain, ((1 << PipelineBits) - 1) * region.counted);
+ double rAcc = std::min<double>(region.val.rSum * gain, (maxVal - 1) * region.counted);
+ double gAcc = std::min<double>(region.val.gSum * gain, (maxVal - 1) * region.counted);
+ double bAcc = std::min<double>(region.val.bSum * gain, (maxVal - 1) * region.counted);
rSum += rAcc * weights[i];
gSum += gAcc * weights[i];
bSum += bAcc * weights[i];
@@ -608,7 +607,7 @@ static double computeInitialY(StatisticsPtr &stats, AwbStatus const &awb,
double ySum = rSum * awb.gainR * .299 +
gSum * awb.gainG * .587 +
bSum * awb.gainB * .114;
- return ySum / pixelSum / (1 << PipelineBits);
+ return ySum / pixelSum / maxVal;
}
/*