tvl-depot/users/flokli/ipu6-softisp/libcamera/0012-libcamera-ipa-Soft-IPA-add-a-Simple-Soft-IPA-impleme.patch

From c0886381a2bbe494b900d699a3858573316059b2 Mon Sep 17 00:00:00 2001
From: Andrey Konovalov <andrey.konovalov@linaro.org>
Date: Mon, 11 Dec 2023 23:47:47 +0300
Subject: [PATCH 12/25] libcamera: ipa: Soft IPA: add a Simple Soft IPA
 implementation

Auto exposure/gain and AWB implementation by Dennis, Toon and Martti.

Co-authored-by: Dennis Bonke <admin@dennisbonke.com>
Signed-off-by: Dennis Bonke <admin@dennisbonke.com>
Co-authored-by: Marttico <g.martti@gmail.com>
Signed-off-by: Marttico <g.martti@gmail.com>
Co-authored-by: Toon Langendam <t.langendam@gmail.com>
Signed-off-by: Toon Langendam <t.langendam@gmail.com>
Signed-off-by: Andrey Konovalov <andrey.konovalov@linaro.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Tested-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org> # sc8280xp Lenovo x13s
Tested-by: Pavel Machek <pavel@ucw.cz>
---
 meson_options.txt                      |   3 +-
 src/ipa/simple/meson.build             |   9 +
 src/ipa/simple/simple/data/meson.build |   9 +
 src/ipa/simple/simple/data/soft.conf   |   3 +
 src/ipa/simple/simple/meson.build      |  26 +++
 src/ipa/simple/simple/soft_simple.cpp  | 273 +++++++++++++++++++++++++
 6 files changed, 322 insertions(+), 1 deletion(-)
 create mode 100644 src/ipa/simple/simple/data/meson.build
 create mode 100644 src/ipa/simple/simple/data/soft.conf
 create mode 100644 src/ipa/simple/simple/meson.build
 create mode 100644 src/ipa/simple/simple/soft_simple.cpp

diff --git a/meson_options.txt b/meson_options.txt
index 5fdc7be8..8ec08658 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -27,7 +27,7 @@ option('gstreamer',
 
 option('ipas',
         type : 'array',
-        choices : ['ipu3', 'rkisp1', 'rpi/vc4', 'vimc'],
+        choices : ['ipu3', 'rkisp1', 'rpi/vc4', 'simple/simple', 'vimc'],
         description : 'Select which IPA modules to build')
 
 option('lc-compliance',
@@ -46,6 +46,7 @@ option('pipelines',
             'rkisp1',
             'rpi/vc4',
             'simple',
+            'simple/simple',
             'uvcvideo',
             'vimc'
         ],
diff --git a/src/ipa/simple/meson.build b/src/ipa/simple/meson.build
index 9688bbdb..14be5dc2 100644
--- a/src/ipa/simple/meson.build
+++ b/src/ipa/simple/meson.build
@@ -1,3 +1,12 @@
 # SPDX-License-Identifier: CC0-1.0
 
 subdir('common')
+
+foreach pipeline : pipelines
+    pipeline = pipeline.split('/')
+    if pipeline.length() < 2 or pipeline[0] != 'simple'
+        continue
+    endif
+
+    subdir(pipeline[1])
+endforeach
diff --git a/src/ipa/simple/simple/data/meson.build b/src/ipa/simple/simple/data/meson.build
new file mode 100644
index 00000000..33548cc6
--- /dev/null
+++ b/src/ipa/simple/simple/data/meson.build
@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: CC0-1.0
+
+conf_files = files([
+    'soft.conf',
+])
+
+install_data(conf_files,
+             install_dir : ipa_data_dir / 'soft',
+             install_tag : 'runtime')
diff --git a/src/ipa/simple/simple/data/soft.conf b/src/ipa/simple/simple/data/soft.conf
new file mode 100644
index 00000000..0c70e7c0
--- /dev/null
+++ b/src/ipa/simple/simple/data/soft.conf
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+#
+# Dummy configuration file for the soft IPA.
diff --git a/src/ipa/simple/simple/meson.build b/src/ipa/simple/simple/meson.build
new file mode 100644
index 00000000..8b5d76b5
--- /dev/null
+++ b/src/ipa/simple/simple/meson.build
@@ -0,0 +1,26 @@
+# SPDX-License-Identifier: CC0-1.0
+
+ipa_name = 'ipa_soft_simple'
+
+mod = shared_module(ipa_name,
+                    ['soft_simple.cpp', libcamera_generated_ipa_headers],
+                    name_prefix : '',
+                    include_directories : [ipa_includes, libipa_includes, '..'],
+                    dependencies : libcamera_private,
+                    link_with : libipa,
+                    link_whole : soft_ipa_common_lib,
+                    install : true,
+                    install_dir : ipa_install_dir)
+
+if ipa_sign_module
+    custom_target(ipa_name + '.so.sign',
+                  input : mod,
+                  output : ipa_name + '.so.sign',
+                  command : [ipa_sign, ipa_priv_key, '@INPUT@', '@OUTPUT@'],
+                  install : false,
+                  build_by_default : true)
+endif
+
+subdir('data')
+
+ipa_names += ipa_name
diff --git a/src/ipa/simple/simple/soft_simple.cpp b/src/ipa/simple/simple/soft_simple.cpp
new file mode 100644
index 00000000..93fc1545
--- /dev/null
+++ b/src/ipa/simple/simple/soft_simple.cpp
@@ -0,0 +1,273 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2023, Linaro Ltd
+ *
+ * soft_simple.cpp - Simple Software Image Processing Algorithm module
+ */
+
+#include <sys/mman.h>
+
+#include <libcamera/base/file.h>
+#include <libcamera/base/log.h>
+
+#include <libcamera/control_ids.h>
+
+#include <libcamera/ipa/ipa_interface.h>
+#include <libcamera/ipa/ipa_module_info.h>
+
+#include "libcamera/internal/camera_sensor.h"
+#include "libcamera/internal/software_isp/debayer_params.h"
+#include "libcamera/internal/software_isp/swisp_stats.h"
+
+#include "common/soft_base.h"
+
+#define EXPOSURE_OPTIMAL_VALUE 2.5
+#define EXPOSURE_SATISFACTORY_OFFSET 0.2
+
+namespace libcamera {
+
+LOG_DECLARE_CATEGORY(IPASoft)
+
+namespace ipa::soft {
+
+class IPASoftSimple final : public IPASoftBase
+{
+public:
+	IPASoftSimple()
+		: IPASoftBase(), ignore_updates_(0)
+	{
+	}
+
+	~IPASoftSimple()
+	{
+		if (stats_)
+			munmap(stats_, sizeof(SwIspStats));
+		if (params_)
+			munmap(params_, sizeof(DebayerParams));
+	}
+
+	int platformInit(const ControlInfoMap &sensorInfoMap) override;
+	int platformConfigure(const ControlInfoMap &sensorInfoMap) override;
+	int platformStart() override;
+	void platformStop() override;
+	void platformProcessStats(const ControlList &sensorControls) override;
+
+private:
+	void update_exposure(double exposuremsv);
+
+	DebayerParams *params_;
+	SwIspStats *stats_;
+	int exposure_min_, exposure_max_;
+	int again_min_, again_max_;
+	int again_, exposure_;
+	int ignore_updates_;
+};
+
+int IPASoftSimple::platformInit(const ControlInfoMap &sensorInfoMap)
+{
+	params_ = static_cast<DebayerParams *>(mmap(nullptr, sizeof(DebayerParams),
+						    PROT_WRITE, MAP_SHARED,
+						    fdParams_.get(), 0));
+	if (!params_) {
+		LOG(IPASoft, Error) << "Unable to map Parameters";
+		return -ENODEV;
+	}
+
+	stats_ = static_cast<SwIspStats *>(mmap(nullptr, sizeof(SwIspStats),
+						PROT_READ, MAP_SHARED,
+						fdStats_.get(), 0));
+	if (!stats_) {
+		LOG(IPASoft, Error) << "Unable to map Statistics";
+		return -ENODEV;
+	}
+
+	if (sensorInfoMap.find(V4L2_CID_EXPOSURE) == sensorInfoMap.end()) {
+		LOG(IPASoft, Error) << "Don't have exposure control";
+		return -EINVAL;
+	}
+
+	if (sensorInfoMap.find(V4L2_CID_ANALOGUE_GAIN) == sensorInfoMap.end()) {
+		LOG(IPASoft, Error) << "Don't have gain control";
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+int IPASoftSimple::platformConfigure(const ControlInfoMap &sensorInfoMap)
+{
+	const ControlInfo &exposure_info = sensorInfoMap.find(V4L2_CID_EXPOSURE)->second;
+	const ControlInfo &gain_info = sensorInfoMap.find(V4L2_CID_ANALOGUE_GAIN)->second;
+
+	exposure_min_ = exposure_info.min().get<int>();
+	if (!exposure_min_) {
+		LOG(IPASoft, Warning) << "Minimum exposure is zero, that can't be linear";
+		exposure_min_ = 1;
+	}
+	exposure_max_ = exposure_info.max().get<int>();
+	again_min_ = gain_info.min().get<int>();
+	if (!again_min_) {
+		LOG(IPASoft, Warning) << "Minimum gain is zero, that can't be linear";
+		again_min_ = 100;
+	}
+	again_max_ = gain_info.max().get<int>();
+
+	LOG(IPASoft, Info) << "Exposure " << exposure_min_ << "-" << exposure_max_
+			   << ", gain " << again_min_ << "-" << again_max_;
+
+	return 0;
+}
+
+int IPASoftSimple::platformStart()
+{
+	return 0;
+}
+
+void IPASoftSimple::platformStop()
+{
+}
+
+void IPASoftSimple::platformProcessStats(const ControlList &sensorControls)
+{
+	/*
+	 * Calculate red and blue gains for AWB.
+	 * Clamp max gain at 4.0, this also avoids 0 division.
+	 */
+	if (stats_->sumR_ <= stats_->sumG_ / 4)
+		params_->gainR = 1024;
+	else
+		params_->gainR = 256 * stats_->sumG_ / stats_->sumR_;
+
+	if (stats_->sumB_ <= stats_->sumG_ / 4)
+		params_->gainB = 1024;
+	else
+		params_->gainB = 256 * stats_->sumG_ / stats_->sumB_;
+
+	/* Green gain and gamma values are fixed */
+	params_->gainG = 256;
+	params_->gamma = 0.5;
+
+	setIspParams.emit(0);
+
+	/*
+	 * AE / AGC, use 2 frames delay to make sure that the exposure and
+	 * the gain set have applied to the camera sensor.
+	 */
+	if (ignore_updates_ > 0) {
+		--ignore_updates_;
+		return;
+	}
+
+	unsigned int denom = 0;
+	unsigned int num = 0;
+	unsigned int y_histogramSmall[5] = {};
+
+	for (int i = 0; i < 16; i++)
+		y_histogramSmall[(i - i / 8) / 3] += stats_->y_histogram[i];
+
+	for (int i = 0; i < 5; i++) {
+		LOG(IPASoft, Debug) << i << ": " << y_histogramSmall[i];
+		denom += y_histogramSmall[i];
+		num += y_histogramSmall[i] * (i + 1);
+	}
+
+	float exposuremsv = (float)num / denom;
+
+	/* sanity check */
+	if (!sensorControls.contains(V4L2_CID_EXPOSURE) ||
+	    !sensorControls.contains(V4L2_CID_ANALOGUE_GAIN)) {
+		LOG(IPASoft, Error) << "Control(s) missing";
+		return;
+	}
+
+	ControlList ctrls(sensorControls);
+
+	exposure_ = ctrls.get(V4L2_CID_EXPOSURE).get<int>();
+	again_ = ctrls.get(V4L2_CID_ANALOGUE_GAIN).get<int>();
+
+	update_exposure(exposuremsv);
+
+	ctrls.set(V4L2_CID_EXPOSURE, exposure_);
+	ctrls.set(V4L2_CID_ANALOGUE_GAIN, again_);
+
+	ignore_updates_ = 2;
+
+	setSensorControls.emit(ctrls);
+
+	LOG(IPASoft, Debug) << "exposuremsv " << exposuremsv
+			    << " exp " << exposure_ << " again " << again_
+			    << " gain R/B " << params_->gainR << "/" << params_->gainB;
+}
+
+/* DENOMINATOR of 10 gives ~10% increment/decrement; DENOMINATOR of 5 - about ~20% */
+#define DENOMINATOR 10
+#define UP_NUMERATOR (DENOMINATOR + 1)
+#define DOWN_NUMERATOR (DENOMINATOR - 1)
+
+void IPASoftSimple::update_exposure(double exposuremsv)
+{
+	int next;
+
+	if (exposuremsv < EXPOSURE_OPTIMAL_VALUE - EXPOSURE_SATISFACTORY_OFFSET) {
+		next = exposure_ * UP_NUMERATOR / DENOMINATOR;
+		if (next - exposure_ < 1)
+			exposure_ += 1;
+		else
+			exposure_ = next;
+		if (exposure_ >= exposure_max_) {
+			next = again_ * UP_NUMERATOR / DENOMINATOR;
+			if (next - again_ < 1)
+				again_ += 1;
+			else
+				again_ = next;
+		}
+	}
+
+	if (exposuremsv > EXPOSURE_OPTIMAL_VALUE + EXPOSURE_SATISFACTORY_OFFSET) {
+		if (exposure_ == exposure_max_ && again_ != again_min_) {
+			next = again_ * DOWN_NUMERATOR / DENOMINATOR;
+			if (again_ - next < 1)
+				again_ -= 1;
+			else
+				again_ = next;
+		} else {
+			next = exposure_ * DOWN_NUMERATOR / DENOMINATOR;
+			if (exposure_ - next < 1)
+				exposure_ -= 1;
+			else
+				exposure_ = next;
+		}
+	}
+
+	if (exposure_ > exposure_max_)
+		exposure_ = exposure_max_;
+	else if (exposure_ < exposure_min_)
+		exposure_ = exposure_min_;
+
+	if (again_ > again_max_)
+		again_ = again_max_;
+	else if (again_ < again_min_)
+		again_ = again_min_;
+}
+
+} /* namespace ipa::soft */
+
+/*
+ * External IPA module interface
+ */
+extern "C" {
+const struct IPAModuleInfo ipaModuleInfo = {
+	IPA_MODULE_API_VERSION,
+	0,
+	"SimplePipelineHandler",
+	"soft/simple",
+};
+
+IPAInterface *ipaCreate()
+{
+	return new ipa::soft::IPASoftSimple();
+}
+
+} /* extern "C" */
+
+} /* namespace libcamera */
-- 
2.43.0