diff options
Diffstat (limited to 'src/ipa/rkisp1/algorithms/agc.cpp')
| -rw-r--r-- | src/ipa/rkisp1/algorithms/agc.cpp | 81 |
1 files changed, 76 insertions, 5 deletions
diff --git a/src/ipa/rkisp1/algorithms/agc.cpp b/src/ipa/rkisp1/algorithms/agc.cpp index 47a6f7b2..f8d1b9a3 100644 --- a/src/ipa/rkisp1/algorithms/agc.cpp +++ b/src/ipa/rkisp1/algorithms/agc.cpp @@ -65,6 +65,29 @@ Agc::Agc() } /** + * \brief Initialise the AGC algorithm from tuning files + * \param[in] context The shared IPA context + * \param[in] tuningData The YamlObject containing Agc tuning data + * + * This function calls the base class' tuningData parsers to discover which + * control values are supported. + * + * \return 0 on success or errors from the base class + */ +int Agc::init(IPAContext &context, const YamlObject &tuningData) +{ + int ret; + + ret = parseTuningData(tuningData); + if (ret) + return ret; + + context.ctrlMap.merge(controls()); + + return 0; +} + +/** * \brief Configure the AGC given a configInfo * \param[in] context The shared IPA context * \param[in] configInfo The IPA configuration data @@ -81,6 +104,9 @@ int Agc::configure(IPAContext &context, const IPACameraSensorInfo &configInfo) context.activeState.agc.manual.exposure = context.activeState.agc.automatic.exposure; context.activeState.agc.autoEnabled = !context.configuration.raw; + context.activeState.agc.constraintMode = constraintModes().begin()->first; + context.activeState.agc.exposureMode = exposureModeHelpers().begin()->first; + /* * Define the measurement window for AGC as a centered rectangle * covering 3/4 of the image width and height. @@ -95,6 +121,15 @@ int Agc::configure(IPAContext &context, const IPACameraSensorInfo &configInfo) * frame index */ frameCount_ = 0; + + /* \todo Run this again when FrameDurationLimits is passed in */ + setLimits(context.configuration.sensor.minShutterSpeed, + context.configuration.sensor.maxShutterSpeed, + context.configuration.sensor.minAnalogueGain, + context.configuration.sensor.maxAnalogueGain); + + resetFrameCount(); + return 0; } @@ -234,7 +269,6 @@ void Agc::computeExposure(IPAContext &context, IPAFrameContext &frameContext, double yGain, double iqMeanGain) { IPASessionConfiguration &configuration = context.configuration; - IPAActiveState &activeState = context.activeState; /* Get the effective exposure and gain applied on the sensor. */ uint32_t exposure = frameContext.sensor.exposure; @@ -300,10 +334,6 @@ void Agc::computeExposure(IPAContext &context, IPAFrameContext &frameContext, LOG(RkISP1Agc, Debug) << "Divided up shutter and gain are " << shutterTime << " and " << stepGain; - - /* Update the estimated exposure and gain. */ - activeState.agc.automatic.exposure = shutterTime / configuration.sensor.lineDuration; - activeState.agc.automatic.gain = stepGain; } /** @@ -373,6 +403,19 @@ void Agc::fillMetadata(IPAContext &context, IPAFrameContext &frameContext, metadata.set(controls::FrameDuration, frameDuration.get<std::micro>()); } +double Agc::estimateLuminance(double gain) const +{ + double ySum = 0.0; + + /* Sum the averages, saturated to 255. */ + for (uint8_t expMean : expMeans_) + ySum += std::min(expMean * gain, 255.0); + + /* \todo Weight with the AWB gains */ + + return ySum / expMeans_.size() / 255; +} + /** * \brief Process RkISP1 statistics, and run AGC operations * \param[in] context The shared IPA context @@ -438,7 +481,35 @@ void Agc::process(IPAContext &context, [[maybe_unused]] const uint32_t frame, computeExposure(context, frameContext, yGain, iqMeanGain); frameCount_++; + expMeans_ = { params->ae.exp_mean, context.hw->numAeCells }; + + /* + * 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; + double analogueGain = frameContext.sensor.gain; + utils::Duration effectiveExposureValue = exposureTime * analogueGain; + + utils::Duration shutterTime; + double aGain, dGain; + std::tie(shutterTime, aGain, dGain) = + calculateNewEv(context.activeState.agc.constraintMode, + context.activeState.agc.exposureMode, + Histogram(hist), effectiveExposureValue); + + LOG(RkISP1Agc, Debug) + << "Divided up shutter, analogue gain and digital gain are " + << shutterTime << ", " << aGain << " and " << dGain; + + IPAActiveState &activeState = context.activeState; + /* Update the estimated exposure and gain. */ + activeState.agc.automatic.exposure = shutterTime / context.configuration.sensor.lineDuration; + activeState.agc.automatic.gain = aGain; + fillMetadata(context, frameContext, metadata); + expMeans_ = {}; } REGISTER_IPA_ALGORITHM(Agc, "Agc") |