diff options
Diffstat (limited to 'src/ipa')
| -rw-r--r-- | src/ipa/ipu3/algorithms/agc.cpp | 26 | ||||
| -rw-r--r-- | src/ipa/ipu3/algorithms/agc.h | 1 |
2 files changed, 9 insertions, 18 deletions
diff --git a/src/ipa/ipu3/algorithms/agc.cpp b/src/ipa/ipu3/algorithms/agc.cpp index 2a482107..db76d6ef 100644 --- a/src/ipa/ipu3/algorithms/agc.cpp +++ b/src/ipa/ipu3/algorithms/agc.cpp @@ -80,8 +80,7 @@ static constexpr double kNormalizedLumaTarget = 0.16; Agc::Agc() : frameCount_(0), iqMean_(0.0), lineDuration_(0s), minExposureLines_(0), - maxExposureLines_(0), filteredExposure_(0s), currentExposure_(0s), - prevExposureValue_(0s) + maxExposureLines_(0), filteredExposure_(0s), currentExposure_(0s) { } @@ -112,10 +111,6 @@ int Agc::configure(IPAContext &context, const IPAConfigInfo &configInfo) context.frameContext.agc.gain = minAnalogueGain_; context.frameContext.agc.exposure = minExposureLines_; - prevExposureValue_ = context.frameContext.agc.gain - * context.frameContext.agc.exposure - * lineDuration_; - return 0; } @@ -224,6 +219,13 @@ void Agc::computeExposure(IPAFrameContext &frameContext, double currentYGain) /* Calculate the shutter time in seconds */ utils::Duration currentShutter = exposure * lineDuration_; + + /* + * Update the exposure value for the next computation using the values + * of exposure and gain really used by the sensor. + */ + utils::Duration effectiveExposureValue = currentShutter * analogueGain; + LOG(IPU3Agc, Debug) << "Actual total exposure " << currentShutter * analogueGain << " Shutter speed " << currentShutter << " Gain " << analogueGain @@ -233,7 +235,7 @@ void Agc::computeExposure(IPAFrameContext &frameContext, double currentYGain) * Calculate the current exposure value for the scene as the latest * exposure value applied multiplied by the new estimated gain. */ - currentExposure_ = prevExposureValue_ * evGain; + currentExposure_ = effectiveExposureValue * evGain; utils::Duration minShutterSpeed = minExposureLines_ * lineDuration_; utils::Duration maxShutterSpeed = maxExposureLines_ * lineDuration_; @@ -265,16 +267,6 @@ void Agc::computeExposure(IPAFrameContext &frameContext, double currentYGain) /* Update the estimated exposure and gain. */ frameContext.agc.exposure = shutterTime / lineDuration_; frameContext.agc.gain = 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; } /** diff --git a/src/ipa/ipu3/algorithms/agc.h b/src/ipa/ipu3/algorithms/agc.h index 8f99dab9..17a5d1d9 100644 --- a/src/ipa/ipu3/algorithms/agc.h +++ b/src/ipa/ipu3/algorithms/agc.h @@ -53,7 +53,6 @@ private: utils::Duration filteredExposure_; utils::Duration currentExposure_; - utils::Duration prevExposureValue_; uint32_t stride_; }; |