new file mode 100644
@@ -0,0 +1,70 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2022, Theobroma Systems
+ *
+ * af.cpp - AF control algorithm
+ */
+
+#include "af.h"
+
+/**
+ * \file af.h
+ */
+
+namespace libcamera::ipa::rkisp1::algorithms {
+
+/**
+ * \class Af
+ * \brief AF control algorithm
+ */
+
+LOG_DEFINE_CATEGORY(RkISP1Af)
+
+/**
+ * \copydoc libcamera::ipa::Algorithm::configure
+ */
+int Af::configure([[maybe_unused]] IPAContext &context,
+ [[maybe_unused]] const IPACameraSensorInfo &configInfo)
+{
+ return 0;
+}
+
+/**
+ * \copydoc libcamera::ipa::Algorithm::prepare
+ */
+void Af::prepare([[maybe_unused]] IPAContext &context, [[maybe_unused]] rkisp1_params_cfg *params)
+{
+}
+
+/**
+ * \copydoc libcamera::ipa::Algorithm::process
+ */
+void Af::process(IPAContext &context,
+ [[maybe_unused]] IPAFrameContext *frameCtx,
+ const rkisp1_stat_buffer *stats)
+{
+ uint32_t sharpness = stats->params.af.window[0].sum;
+ uint32_t luminance = stats->params.af.window[0].lum;
+
+ LOG(RkISP1Af, Debug) << "lensPosition: " << context.frameContext.af.focus
+ << ", Sharpness: " << sharpness
+ << ", Luminance: " << luminance;
+
+ uint32_t lensPosition = processAutofocus(sharpness);
+
+ context.frameContext.af.focus = lensPosition;
+}
+
+void Af::setMetering([[maybe_unused]] controls::AfMeteringEnum metering)
+{
+ LOG(RkISP1Af, Error) << __FUNCTION__ << " not implemented!";
+}
+
+void Af::setWindows([[maybe_unused]] Span<const Rectangle> windows)
+{
+ LOG(RkISP1Af, Error) << __FUNCTION__ << " not implemented!";
+}
+
+REGISTER_IPA_ALGORITHM(Af, "Af")
+
+} /* namespace libcamera::ipa::rkisp1::algorithms */
new file mode 100644
@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2022, Theobroma Systems
+ *
+ * af.h - AF control algorithm
+ */
+
+#pragma once
+
+#include <linux/rkisp1-config.h>
+
+#include "libipa/algorithms/af_hill_climbing.h"
+#include "module.h"
+
+namespace libcamera::ipa::rkisp1::algorithms {
+
+class Af : public ipa::common::algorithms::AfHillClimbing<Module>
+{
+public:
+ Af() = default;
+ ~Af() = default;
+
+ int configure(IPAContext &context, const IPACameraSensorInfo &configInfo) override;
+ void prepare(IPAContext &context, rkisp1_params_cfg *params) override;
+ void process(IPAContext &context, IPAFrameContext *frameCtx,
+ const rkisp1_stat_buffer *stats) override;
+
+ void setMetering(controls::AfMeteringEnum metering) override;
+ void setWindows(Span<const Rectangle> windows) override;
+};
+
+} /* namespace libcamera::ipa::rkisp1::algorithms */
@@ -1,6 +1,7 @@
# SPDX-License-Identifier: CC0-1.0
rkisp1_ipa_algorithms = files([
+ 'af.cpp',
'agc.cpp',
'awb.cpp',
'blc.cpp',
Rockchip ISP AF block allows calculation of sharpness and luminance in up to three user defined windows. If no windows are set, there are some default settings applied for the first window and exposed through the driver. For each frame, use the sharpness value calculated for this default window and feed the hill climbing algorithm with them. Then set the lens position to value calculated by the algorithm. Signed-off-by: Daniel Semkowicz <dse@thaumatec.com> --- src/ipa/rkisp1/algorithms/af.cpp | 70 +++++++++++++++++++++++++++ src/ipa/rkisp1/algorithms/af.h | 32 ++++++++++++ src/ipa/rkisp1/algorithms/meson.build | 1 + 3 files changed, 103 insertions(+) create mode 100644 src/ipa/rkisp1/algorithms/af.cpp create mode 100644 src/ipa/rkisp1/algorithms/af.h