diff options
Diffstat (limited to 'src/ipa/rkisp1/algorithms/agc.cpp')
| -rw-r--r-- | src/ipa/rkisp1/algorithms/agc.cpp | 27 |
1 files changed, 13 insertions, 14 deletions
diff --git a/src/ipa/rkisp1/algorithms/agc.cpp b/src/ipa/rkisp1/algorithms/agc.cpp index e5aeb342..f83a9ba1 100644 --- a/src/ipa/rkisp1/algorithms/agc.cpp +++ b/src/ipa/rkisp1/algorithms/agc.cpp @@ -186,8 +186,8 @@ void Agc::prepare(IPAContext &context, const uint32_t frame, /* Produce the luminance histogram. */ params->meas.hst_config.mode = RKISP1_CIF_ISP_HISTOGRAM_MODE_Y_HISTOGRAM; /* Set an average weighted histogram. */ - for (unsigned int histBin = 0; histBin < numHistBins_; histBin++) - params->meas.hst_config.hist_weight[histBin] = 1; + Span<uint8_t> weights{ params->meas.hst_config.hist_weight, numHistBins_ }; + std::fill(weights.begin(), weights.end(), 1); /* Step size can't be less than 3. */ params->meas.hst_config.histogram_predivider = 4; @@ -318,7 +318,7 @@ void Agc::computeExposure(IPAContext &context, IPAFrameContext &frameContext, /** * \brief Estimate the relative luminance of the frame with a given gain - * \param[in] ae The RkISP1 statistics and ISP results + * \param[in] expMeans The mean luminance values, from the RkISP1 statistics * \param[in] gain The gain to apply to the frame * * This function estimates the average relative luminance of the frame that @@ -342,28 +342,27 @@ void Agc::computeExposure(IPAContext &context, IPAFrameContext &frameContext, * * \return The relative luminance */ -double Agc::estimateLuminance(const rkisp1_cif_isp_ae_stat *ae, - double gain) +double Agc::estimateLuminance(Span<const uint8_t> expMeans, double gain) { double ySum = 0.0; /* Sum the averages, saturated to 255. */ - for (unsigned int aeCell = 0; aeCell < numCells_; aeCell++) - ySum += std::min(ae->exp_mean[aeCell] * gain, 255.0); + for (uint8_t expMean : expMeans) + ySum += std::min(expMean * gain, 255.0); /* \todo Weight with the AWB gains */ - return ySum / numCells_ / 255; + return ySum / expMeans.size() / 255; } /** * \brief Estimate the mean value of the top 2% of the histogram - * \param[in] hist The histogram statistics computed by the ImgU + * \param[in] hist The histogram statistics computed by the RkISP1 * \return The mean value of the top 2% of the histogram */ -double Agc::measureBrightness(const rkisp1_cif_isp_hist_stat *hist) const +double Agc::measureBrightness(Span<const uint32_t> hist) const { - Histogram histogram{ Span<const uint32_t>(hist->hist_bins, numHistBins_) }; + Histogram histogram{ hist }; /* Estimate the quantile mean of the top 2% of the histogram. */ return histogram.interQuantileMean(0.98, 1.0); } @@ -415,11 +414,11 @@ void Agc::process(IPAContext &context, [[maybe_unused]] const uint32_t frame, const rkisp1_cif_isp_stat *params = &stats->params; ASSERT(stats->meas_type & RKISP1_CIF_ISP_STAT_AUTOEXP); - const rkisp1_cif_isp_ae_stat *ae = ¶ms->ae; - const rkisp1_cif_isp_hist_stat *hist = ¶ms->hist; + Span<const uint8_t> ae{ params->ae.exp_mean, numCells_ }; + Span<const uint32_t> hist{ params->hist.hist_bins, numHistBins_ }; double iqMean = measureBrightness(hist); - double iqMeanGain = kEvGainTarget * numHistBins_ / iqMean; + double iqMeanGain = kEvGainTarget * hist.size() / iqMean; /* * Estimate the gain needed to achieve a relative luminance target. To |