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-rw-r--r--src/ipa/ipu3/ipu3.cpp2
-rw-r--r--src/ipa/ipu3/ipu3_agc.cpp24
-rw-r--r--src/ipa/ipu3/ipu3_agc.h7
3 files changed, 20 insertions, 13 deletions
diff --git a/src/ipa/ipu3/ipu3.cpp b/src/ipa/ipu3/ipu3.cpp
index 700a5660..2496b0a0 100644
--- a/src/ipa/ipu3/ipu3.cpp
+++ b/src/ipa/ipu3/ipu3.cpp
@@ -174,7 +174,7 @@ void IPAIPU3::configure(const IPAConfigInfo &configInfo)
awbAlgo_->initialise(params_, configInfo.bdsOutputSize, bdsGrid_);
agcAlgo_ = std::make_unique<IPU3Agc>();
- agcAlgo_->initialise(bdsGrid_);
+ agcAlgo_->initialise(bdsGrid_, configInfo.sensorInfo);
}
void IPAIPU3::mapBuffers(const std::vector<IPABuffer> &buffers)
diff --git a/src/ipa/ipu3/ipu3_agc.cpp b/src/ipa/ipu3/ipu3_agc.cpp
index 8bae423f..8ca95013 100644
--- a/src/ipa/ipu3/ipu3_agc.cpp
+++ b/src/ipa/ipu3/ipu3_agc.cpp
@@ -11,6 +11,8 @@
#include <cmath>
#include <numeric>
+#include <libcamera/ipa/core_ipa_interface.h>
+
#include "libcamera/internal/log.h"
#include "libipa/histogram.h"
@@ -39,11 +41,6 @@ static constexpr uint32_t kMaxGain = kMaxISO / 100;
static constexpr uint32_t kMinExposure = 1;
static constexpr uint32_t kMaxExposure = 1976;
-/* \todo those should be got from IPACameraSensorInfo ! */
-/* line duration in microseconds */
-static constexpr double kLineDuration = 16.8;
-static constexpr double kMaxExposureTime = kMaxExposure * kLineDuration;
-
/* Histogram constants */
static constexpr uint32_t knumHistogramBins = 256;
static constexpr double kEvGainTarget = 0.5;
@@ -54,14 +51,19 @@ static constexpr uint8_t kCellSize = 8;
IPU3Agc::IPU3Agc()
: frameCount_(0), lastFrame_(0), converged_(false),
updateControls_(false), iqMean_(0.0), gamma_(1.0),
+ lineDuration_(0.0), maxExposureTime_(0.0),
prevExposure_(0.0), prevExposureNoDg_(0.0),
currentExposure_(0.0), currentExposureNoDg_(0.0)
{
}
-void IPU3Agc::initialise(struct ipu3_uapi_grid_config &bdsGrid)
+void IPU3Agc::initialise(struct ipu3_uapi_grid_config &bdsGrid, const IPACameraSensorInfo &sensorInfo)
{
aeGrid_ = bdsGrid;
+
+ /* line duration in microseconds */
+ lineDuration_ = sensorInfo.lineLength * 1000000ULL / static_cast<double>(sensorInfo.pixelRate);
+ maxExposureTime_ = kMaxExposure * lineDuration_;
}
void IPU3Agc::processBrightness(const ipu3_uapi_stats_3a *stats)
@@ -160,13 +162,13 @@ void IPU3Agc::lockExposureGain(uint32_t &exposure, uint32_t &gain)
double newGain = kEvGainTarget * knumHistogramBins / iqMean_;
/* extracted from Rpi::Agc::computeTargetExposure */
- double currentShutter = exposure * kLineDuration;
+ double currentShutter = exposure * lineDuration_;
currentExposureNoDg_ = currentShutter * gain;
LOG(IPU3Agc, Debug) << "Actual total exposure " << currentExposureNoDg_
<< " Shutter speed " << currentShutter
<< " Gain " << gain;
currentExposure_ = currentExposureNoDg_ * newGain;
- double maxTotalExposure = kMaxExposureTime * kMaxGain;
+ double maxTotalExposure = maxExposureTime_ * kMaxGain;
currentExposure_ = std::min(currentExposure_, maxTotalExposure);
LOG(IPU3Agc, Debug) << "Target total exposure " << currentExposure_;
@@ -174,18 +176,18 @@ void IPU3Agc::lockExposureGain(uint32_t &exposure, uint32_t &gain)
filterExposure();
double newExposure = 0.0;
- if (currentShutter < kMaxExposureTime) {
+ if (currentShutter < maxExposureTime_) {
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 >= kMaxExposureTime) {
+ } 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 * kLineDuration << " and gain " << gain;
+ LOG(IPU3Agc, Debug) << "Adjust exposure " << exposure * lineDuration_ << " and gain " << gain;
}
lastFrame_ = frameCount_;
}
diff --git a/src/ipa/ipu3/ipu3_agc.h b/src/ipa/ipu3/ipu3_agc.h
index bfdf45d1..99a582a9 100644
--- a/src/ipa/ipu3/ipu3_agc.h
+++ b/src/ipa/ipu3/ipu3_agc.h
@@ -18,6 +18,8 @@
namespace libcamera {
+class IPACameraSensorInfo;
+
namespace ipa::ipu3 {
class IPU3Agc : public Algorithm
@@ -26,7 +28,7 @@ public:
IPU3Agc();
~IPU3Agc() = default;
- void initialise(struct ipu3_uapi_grid_config &bdsGrid);
+ void initialise(struct ipu3_uapi_grid_config &bdsGrid, const IPACameraSensorInfo &sensorInfo);
void process(const ipu3_uapi_stats_3a *stats, uint32_t &exposure, uint32_t &gain);
bool converged() { return converged_; }
bool updateControls() { return updateControls_; }
@@ -49,6 +51,9 @@ private:
double iqMean_;
double gamma_;
+ double lineDuration_;
+ double maxExposureTime_;
+
double prevExposure_;
double prevExposureNoDg_;
double currentExposure_;