diff options
| -rw-r--r-- | src/ipa/ipu3/algorithms/agc.cpp | 19 | ||||
| -rw-r--r-- | src/ipa/ipu3/algorithms/agc.h | 1 |
2 files changed, 18 insertions, 2 deletions
diff --git a/src/ipa/ipu3/algorithms/agc.cpp b/src/ipa/ipu3/algorithms/agc.cpp index e7c59f3d..43ef89df 100644 --- a/src/ipa/ipu3/algorithms/agc.cpp +++ b/src/ipa/ipu3/algorithms/agc.cpp @@ -42,7 +42,8 @@ static constexpr double kEvGainTarget = 0.5; Agc::Agc() : frameCount_(0), lastFrame_(0), iqMean_(0.0), lineDuration_(0s), minExposureLines_(0), maxExposureLines_(0), filteredExposure_(0s), - filteredExposureNoDg_(0s), currentExposure_(0s), currentExposureNoDg_(0s) + filteredExposureNoDg_(0s), currentExposure_(0s), + currentExposureNoDg_(0s), prevExposureValue_(0s) { } @@ -62,6 +63,10 @@ int Agc::configure(IPAContext &context, const IPAConfigInfo &configInfo) context.configuration.agc.minAnalogueGain; context.frameContext.agc.exposure = minExposureLines_; + prevExposureValue_ = context.frameContext.agc.gain + * context.frameContext.agc.exposure + * lineDuration_; + return 0; } @@ -147,7 +152,7 @@ void Agc::lockExposureGain(uint32_t &exposure, double &analogueGain) << " Gain " << analogueGain << " Needed ev gain " << evGain; - currentExposure_ = currentExposureNoDg_ * evGain; + currentExposure_ = prevExposureValue_ * evGain; utils::Duration minShutterSpeed = minExposureLines_ * lineDuration_; utils::Duration maxShutterSpeed = maxExposureLines_ * lineDuration_; @@ -176,6 +181,16 @@ void Agc::lockExposureGain(uint32_t &exposure, double &analogueGain) exposure = shutterTime / lineDuration_; analogueGain = stepGain; + + /* + * Update the exposure value for the next process call. + * + * \todo Obtain the values of the exposure time and analog gain + * that were actually used by the sensor, either from embedded + * data when available, or from the delayed controls + * infrastructure in case a slow down caused a mismatch. + */ + prevExposureValue_ = shutterTime * analogueGain; } lastFrame_ = frameCount_; } diff --git a/src/ipa/ipu3/algorithms/agc.h b/src/ipa/ipu3/algorithms/agc.h index cd26d08c..2ae88e9f 100644 --- a/src/ipa/ipu3/algorithms/agc.h +++ b/src/ipa/ipu3/algorithms/agc.h @@ -49,6 +49,7 @@ private: utils::Duration filteredExposureNoDg_; utils::Duration currentExposure_; utils::Duration currentExposureNoDg_; + utils::Duration prevExposureValue_; uint32_t stride_; }; |