From fea85f84c2ac940f1e149d1382216ab3da0b7703 Mon Sep 17 00:00:00 2001 From: Jean-Michel Hautbois Date: Fri, 19 Nov 2021 07:56:12 +0100 Subject: ipa: rkisp1: Introduce AGC Now that we have IPAContext and Algorithm, we can implement a simple AGC based on the IPU3 one. It is very similar, except that there is no histogram used for an inter quantile mean. The RkISP1 is returning a 5x5 array (for V10) of luminance means. Estimating the relative luminance is thus a simple mean of all the blocks already calculated by the ISP. Signed-off-by: Jean-Michel Hautbois Reviewed-by: Laurent Pinchart Reviewed-by: Kieran Bingham --- src/ipa/rkisp1/algorithms/agc.h | 46 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 src/ipa/rkisp1/algorithms/agc.h (limited to 'src/ipa/rkisp1/algorithms/agc.h') diff --git a/src/ipa/rkisp1/algorithms/agc.h b/src/ipa/rkisp1/algorithms/agc.h new file mode 100644 index 00000000..07b9ea37 --- /dev/null +++ b/src/ipa/rkisp1/algorithms/agc.h @@ -0,0 +1,46 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ +/* + * Copyright (C) 2021, Ideas On Board + * + * agc.h - RkISP1 AGC/AEC mean-based control algorithm + */ + +#pragma once + +#include + +#include + +#include + +#include "algorithm.h" + +namespace libcamera { + +struct IPACameraSensorInfo; + +namespace ipa::rkisp1::algorithms { + +class Agc : public Algorithm +{ +public: + Agc(); + ~Agc() = default; + + int configure(IPAContext &context, const IPACameraSensorInfo &configInfo) override; + void process(IPAContext &context, const rkisp1_stat_buffer *stats) override; + +private: + void computeExposure(IPAContext &Context, double yGain); + utils::Duration filterExposure(utils::Duration exposureValue); + double estimateLuminance(const rkisp1_cif_isp_ae_stat *ae, double gain); + + uint64_t frameCount_; + + uint32_t numCells_; + + utils::Duration filteredExposure_; +}; + +} /* namespace ipa::rkisp1::algorithms */ +} /* namespace libcamera */ -- cgit v1.2.1