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-rw-r--r--src/ipa/simple/soft_simple.cpp157
1 files changed, 30 insertions, 127 deletions
diff --git a/src/ipa/simple/soft_simple.cpp b/src/ipa/simple/soft_simple.cpp
index 60310a8e..b28c7039 100644
--- a/src/ipa/simple/soft_simple.cpp
+++ b/src/ipa/simple/soft_simple.cpp
@@ -34,23 +34,6 @@ LOG_DEFINE_CATEGORY(IPASoft)
namespace ipa::soft {
-/*
- * The number of bins to use for the optimal exposure calculations.
- */
-static constexpr unsigned int kExposureBinsCount = 5;
-
-/*
- * The exposure is optimal when the mean sample value of the histogram is
- * in the middle of the range.
- */
-static constexpr float kExposureOptimal = kExposureBinsCount / 2.0;
-
-/*
- * The below value implements the hysteresis for the exposure adjustment.
- * It is small enough to have the exposure close to the optimal, and is big
- * enough to prevent the exposure from wobbling around the optimal value.
- */
-static constexpr float kExposureSatisfactory = 0.2;
/* Maximum number of frame contexts to be held */
static constexpr uint32_t kMaxFrameContexts = 16;
@@ -58,8 +41,7 @@ class IPASoftSimple : public ipa::soft::IPASoftInterface, public Module
{
public:
IPASoftSimple()
- : params_(nullptr), stats_(nullptr),
- context_({ {}, {}, { kMaxFrameContexts } })
+ : context_({ {}, {}, { kMaxFrameContexts } })
{
}
@@ -92,11 +74,6 @@ private:
/* Local parameter storage */
struct IPAContext context_;
-
- int32_t exposureMin_, exposureMax_;
- int32_t exposure_;
- double againMin_, againMax_, againMinStep_;
- double again_;
};
IPASoftSimple::~IPASoftSimple()
@@ -207,20 +184,23 @@ int IPASoftSimple::configure(const IPAConfigInfo &configInfo)
const ControlInfo &exposureInfo = sensorInfoMap_.find(V4L2_CID_EXPOSURE)->second;
const ControlInfo &gainInfo = sensorInfoMap_.find(V4L2_CID_ANALOGUE_GAIN)->second;
- exposureMin_ = exposureInfo.min().get<int32_t>();
- exposureMax_ = exposureInfo.max().get<int32_t>();
- if (!exposureMin_) {
+ context_.configuration.agc.exposureMin = exposureInfo.min().get<int32_t>();
+ context_.configuration.agc.exposureMax = exposureInfo.max().get<int32_t>();
+ if (!context_.configuration.agc.exposureMin) {
LOG(IPASoft, Warning) << "Minimum exposure is zero, that can't be linear";
- exposureMin_ = 1;
+ context_.configuration.agc.exposureMin = 1;
}
int32_t againMin = gainInfo.min().get<int32_t>();
int32_t againMax = gainInfo.max().get<int32_t>();
if (camHelper_) {
- againMin_ = camHelper_->gain(againMin);
- againMax_ = camHelper_->gain(againMax);
- againMinStep_ = (againMax_ - againMin_) / 100.0;
+ context_.configuration.agc.againMin = camHelper_->gain(againMin);
+ context_.configuration.agc.againMax = camHelper_->gain(againMax);
+ context_.configuration.agc.againMinStep =
+ (context_.configuration.agc.againMax -
+ context_.configuration.agc.againMin) /
+ 100.0;
} else {
/*
* The camera sensor gain (g) is usually not equal to the value written
@@ -232,13 +212,14 @@ int IPASoftSimple::configure(const IPAConfigInfo &configInfo)
* the AGC algorithm (abrupt near one edge, and very small near the
* other) we limit the range of the gain values used.
*/
- againMax_ = againMax;
+ context_.configuration.agc.againMax = againMax;
if (!againMin) {
LOG(IPASoft, Warning)
<< "Minimum gain is zero, that can't be linear";
- againMin_ = std::min(100, againMin / 2 + againMax / 2);
+ context_.configuration.agc.againMin =
+ std::min(100, againMin / 2 + againMax / 2);
}
- againMinStep_ = 1.0;
+ context_.configuration.agc.againMinStep = 1.0;
}
for (auto const &algo : algorithms()) {
@@ -247,9 +228,12 @@ int IPASoftSimple::configure(const IPAConfigInfo &configInfo)
return ret;
}
- LOG(IPASoft, Info) << "Exposure " << exposureMin_ << "-" << exposureMax_
- << ", gain " << againMin_ << "-" << againMax_
- << " (" << againMinStep_ << ")";
+ LOG(IPASoft, Info)
+ << "Exposure " << context_.configuration.agc.exposureMin << "-"
+ << context_.configuration.agc.exposureMax
+ << ", gain " << context_.configuration.agc.againMin << "-"
+ << context_.configuration.agc.againMax
+ << " (" << context_.configuration.agc.againMinStep << ")";
return 0;
}
@@ -284,6 +268,12 @@ void IPASoftSimple::processStats(const uint32_t frame,
const ControlList &sensorControls)
{
IPAFrameContext &frameContext = context_.frameContexts.get(frame);
+
+ frameContext.sensor.exposure =
+ sensorControls.get(V4L2_CID_EXPOSURE).get<int32_t>();
+ int32_t again = sensorControls.get(V4L2_CID_ANALOGUE_GAIN).get<int32_t>();
+ frameContext.sensor.gain = camHelper_ ? camHelper_->gain(again) : again;
+
/*
* Software ISP currently does not produce any metadata. Use an empty
* ControlList for now.
@@ -294,37 +284,6 @@ void IPASoftSimple::processStats(const uint32_t frame,
for (auto const &algo : algorithms())
algo->process(context_, frame, frameContext, stats_, metadata);
- /* \todo Switch to the libipa/algorithm.h API someday. */
-
- /*
- * Calculate Mean Sample Value (MSV) according to formula from:
- * https://www.araa.asn.au/acra/acra2007/papers/paper84final.pdf
- */
- const uint8_t blackLevel = context_.activeState.blc.level;
- const unsigned int blackLevelHistIdx =
- blackLevel / (256 / SwIspStats::kYHistogramSize);
- const unsigned int histogramSize =
- SwIspStats::kYHistogramSize - blackLevelHistIdx;
- const unsigned int yHistValsPerBin = histogramSize / kExposureBinsCount;
- const unsigned int yHistValsPerBinMod =
- histogramSize / (histogramSize % kExposureBinsCount + 1);
- int exposureBins[kExposureBinsCount] = {};
- unsigned int denom = 0;
- unsigned int num = 0;
-
- for (unsigned int i = 0; i < histogramSize; i++) {
- unsigned int idx = (i - (i / yHistValsPerBinMod)) / yHistValsPerBin;
- exposureBins[idx] += stats_->yHistogram[blackLevelHistIdx + i];
- }
-
- for (unsigned int i = 0; i < kExposureBinsCount; i++) {
- LOG(IPASoft, Debug) << i << ": " << exposureBins[i];
- denom += exposureBins[i];
- num += exposureBins[i] * (i + 1);
- }
-
- float exposureMSV = static_cast<float>(num) / denom;
-
/* Sanity check */
if (!sensorControls.contains(V4L2_CID_EXPOSURE) ||
!sensorControls.contains(V4L2_CID_ANALOGUE_GAIN)) {
@@ -332,70 +291,14 @@ void IPASoftSimple::processStats(const uint32_t frame,
return;
}
- exposure_ = sensorControls.get(V4L2_CID_EXPOSURE).get<int32_t>();
- int32_t again = sensorControls.get(V4L2_CID_ANALOGUE_GAIN).get<int32_t>();
- again_ = camHelper_ ? camHelper_->gain(again) : again;
-
- updateExposure(exposureMSV);
-
ControlList ctrls(sensorInfoMap_);
- ctrls.set(V4L2_CID_EXPOSURE, exposure_);
+ auto &againNew = context_.activeState.agc.again;
+ ctrls.set(V4L2_CID_EXPOSURE, context_.activeState.agc.exposure);
ctrls.set(V4L2_CID_ANALOGUE_GAIN,
- static_cast<int32_t>(camHelper_ ? camHelper_->gainCode(again_) : again_));
+ static_cast<int32_t>(camHelper_ ? camHelper_->gainCode(againNew) : againNew));
setSensorControls.emit(ctrls);
-
- LOG(IPASoft, Debug) << "exposureMSV " << exposureMSV
- << " exp " << exposure_ << " again " << again_
- << " black level " << static_cast<unsigned int>(blackLevel);
-}
-
-void IPASoftSimple::updateExposure(double exposureMSV)
-{
- /*
- * kExpDenominator of 10 gives ~10% increment/decrement;
- * kExpDenominator of 5 - about ~20%
- */
- static constexpr uint8_t kExpDenominator = 10;
- static constexpr uint8_t kExpNumeratorUp = kExpDenominator + 1;
- static constexpr uint8_t kExpNumeratorDown = kExpDenominator - 1;
-
- double next;
-
- if (exposureMSV < kExposureOptimal - kExposureSatisfactory) {
- next = exposure_ * kExpNumeratorUp / kExpDenominator;
- if (next - exposure_ < 1)
- exposure_ += 1;
- else
- exposure_ = next;
- if (exposure_ >= exposureMax_) {
- next = again_ * kExpNumeratorUp / kExpDenominator;
- if (next - again_ < againMinStep_)
- again_ += againMinStep_;
- else
- again_ = next;
- }
- }
-
- if (exposureMSV > kExposureOptimal + kExposureSatisfactory) {
- if (exposure_ == exposureMax_ && again_ > againMin_) {
- next = again_ * kExpNumeratorDown / kExpDenominator;
- if (again_ - next < againMinStep_)
- again_ -= againMinStep_;
- else
- again_ = next;
- } else {
- next = exposure_ * kExpNumeratorDown / kExpDenominator;
- if (exposure_ - next < 1)
- exposure_ -= 1;
- else
- exposure_ = next;
- }
- }
-
- exposure_ = std::clamp(exposure_, exposureMin_, exposureMax_);
- again_ = std::clamp(again_, againMin_, againMax_);
}
std::string IPASoftSimple::logPrefix() const
generated by cgit v1.2.1 (git 2.18.0) at 2024-11-16 10:13:10 +0000