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authorPaul Elder <paul.elder@ideasonboard.com>2024-12-16 16:20:10 +0900
committerPaul Elder <paul.elder@ideasonboard.com>2024-12-23 17:38:40 +0900
commit344064a1115d3d14640046d0edea960ba1ede45c (patch)
tree91159f40b4894344c27a3da3128dcb05effef59a /src/ipa/rkisp1/algorithms
parentbd077a11eed5bad324cfe72ae04f8d3835bb2459 (diff)
ipa: rkisp1: Add Lux algorithm module
Add a lux algorithm module to rkisp1 IPA for estimating the lux level of an image. This is reported in metadata, as well as saved in the frame context so that other algorithms (mainly AGC) can use its value. It does not set any controls. Signed-off-by: Paul Elder <paul.elder@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Isaac Scott <isaac.scott@ideasonboard.com>
Diffstat (limited to 'src/ipa/rkisp1/algorithms')
-rw-r--r--src/ipa/rkisp1/algorithms/lux.cpp80
-rw-r--r--src/ipa/rkisp1/algorithms/lux.h36
-rw-r--r--src/ipa/rkisp1/algorithms/meson.build1
3 files changed, 117 insertions, 0 deletions
diff --git a/src/ipa/rkisp1/algorithms/lux.cpp b/src/ipa/rkisp1/algorithms/lux.cpp
new file mode 100644
index 00000000..b0f74963
--- /dev/null
+++ b/src/ipa/rkisp1/algorithms/lux.cpp
@@ -0,0 +1,80 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2024, Ideas On Board
+ *
+ * lux.cpp - RkISP1 Lux control
+ */
+
+#include "lux.h"
+
+#include <libcamera/base/log.h>
+
+#include <libcamera/control_ids.h>
+
+#include "libipa/histogram.h"
+#include "libipa/lux.h"
+
+/**
+ * \file lux.h
+ */
+
+namespace libcamera {
+
+namespace ipa::rkisp1::algorithms {
+
+/**
+ * \class Lux
+ * \brief RkISP1 Lux control
+ *
+ * The Lux algorithm is responsible for estimating the lux level of the image.
+ * It doesn't take or generate any controls, but it provides a lux level for
+ * other algorithms (such as AGC) to use.
+ */
+
+/**
+ * \brief Construct an rkisp1 Lux algo module
+ *
+ * The Lux helper is initialized to 65535 as that is the max bin count on the
+ * rkisp1.
+ */
+Lux::Lux()
+ : lux_(65535)
+{
+}
+
+/**
+ * \copydoc libcamera::ipa::Algorithm::init
+ */
+int Lux::init([[maybe_unused]] IPAContext &context, const YamlObject &tuningData)
+{
+ return lux_.parseTuningData(tuningData);
+}
+
+/**
+ * \copydoc libcamera::ipa::Algorithm::process
+ */
+void Lux::process(IPAContext &context,
+ [[maybe_unused]] const uint32_t frame,
+ IPAFrameContext &frameContext,
+ const rkisp1_stat_buffer *stats,
+ ControlList &metadata)
+{
+ utils::Duration exposureTime = context.configuration.sensor.lineDuration
+ * frameContext.sensor.exposure;
+ double gain = frameContext.sensor.gain;
+
+ /* \todo Deduplicate the histogram calculation from AGC */
+ const rkisp1_cif_isp_stat *params = &stats->params;
+ Histogram yHist({ params->hist.hist_bins, context.hw->numHistogramBins },
+ [](uint32_t x) { return x >> 4; });
+
+ double lux = lux_.estimateLux(exposureTime, gain, 1.0, yHist);
+ frameContext.lux.lux = lux;
+ metadata.set(controls::Lux, lux);
+}
+
+REGISTER_IPA_ALGORITHM(Lux, "Lux")
+
+} /* namespace ipa::rkisp1::algorithms */
+
+} /* namespace libcamera */
diff --git a/src/ipa/rkisp1/algorithms/lux.h b/src/ipa/rkisp1/algorithms/lux.h
new file mode 100644
index 00000000..8a90de55
--- /dev/null
+++ b/src/ipa/rkisp1/algorithms/lux.h
@@ -0,0 +1,36 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2024, Ideas On Board
+ *
+ * lux.h - RkISP1 Lux control
+ */
+
+#pragma once
+
+#include <sys/types.h>
+
+#include "libipa/lux.h"
+
+#include "algorithm.h"
+
+namespace libcamera {
+
+namespace ipa::rkisp1::algorithms {
+
+class Lux : public Algorithm
+{
+public:
+ Lux();
+
+ int init(IPAContext &context, const YamlObject &tuningData) override;
+ void process(IPAContext &context, const uint32_t frame,
+ IPAFrameContext &frameContext,
+ const rkisp1_stat_buffer *stats,
+ ControlList &metadata) override;
+
+private:
+ ipa::Lux lux_;
+};
+
+} /* namespace ipa::rkisp1::algorithms */
+} /* namespace libcamera */
diff --git a/src/ipa/rkisp1/algorithms/meson.build b/src/ipa/rkisp1/algorithms/meson.build
index 1734a667..c66b0b70 100644
--- a/src/ipa/rkisp1/algorithms/meson.build
+++ b/src/ipa/rkisp1/algorithms/meson.build
@@ -12,4 +12,5 @@ rkisp1_ipa_algorithms = files([
'goc.cpp',
'gsl.cpp',
'lsc.cpp',
+ 'lux.cpp',
])