[libcamera-devel] [PATCH 14/21] test: serialization: Add V4L2ControlList serialization test

[Jacopo Mondi]

Add test to serialize and de-serialize a V4L2ControlList.

Signed-off-by: Jacopo Mondi <jacopo at jmondi.org>
---
 test/serialization/meson.build           |   1 +
 test/serialization/v4l2_control_list.cpp | 114 +++++++++++++++++++++++
 2 files changed, 115 insertions(+)
 create mode 100644 test/serialization/v4l2_control_list.cpp

diff --git a/test/serialization/meson.build b/test/serialization/meson.build
index 510bd8c30d38..65ecdf2cf249 100644
--- a/test/serialization/meson.build
+++ b/test/serialization/meson.build
@@ -1,6 +1,7 @@
 serialization_tests = [
     [ 'control_list',              'control_list.cpp' ],
     [ 'control_info_list',         'control_info_list.cpp' ],
+    [ 'v4l2_control_list',         'v4l2_control_list.cpp' ],
 ]
 
 foreach t : serialization_tests
diff --git a/test/serialization/v4l2_control_list.cpp b/test/serialization/v4l2_control_list.cpp
new file mode 100644
index 000000000000..338ca4dadc78
--- /dev/null
+++ b/test/serialization/v4l2_control_list.cpp
@@ -0,0 +1,114 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2019, Google Inc.
+ *
+ * v4l2_control_list.cpp - Serialize and de-serialize a list of v4l2 controls
+ */
+
+#include <iostream>
+
+#include <libcamera/camera.h>
+#include <libcamera/camera_manager.h>
+#include <libcamera/controls.h>
+
+#include "test.h"
+#include "serializer.h"
+#include "serialization_test.h"
+#include "v4l2_controls.h"
+
+using namespace std;
+using namespace libcamera;
+
+class V4L2ControlListSerializeTest : public SerializationTest
+{
+private:
+	void initializeValidationMatrix()
+	{
+		valueValidationMatrix[0][0] = V4L2_CID_SATURATION;
+		valueValidationMatrix[0][1] = DataTypeInteger;
+		valueValidationMatrix[0][2] = 8;
+		valueValidationMatrix[0][3] = 50;
+		valueValidationMatrix[0][4] = false;
+		valueValidationMatrix[1][0] = V4L2_CID_CONTRAST;
+		valueValidationMatrix[1][1] = DataTypeInteger;
+		valueValidationMatrix[1][2] = 8;
+		valueValidationMatrix[1][3] = 128;
+		valueValidationMatrix[1][4] = false;
+		valueValidationMatrix[2][0] = V4L2_CID_BRIGHTNESS;
+		valueValidationMatrix[2][1] = DataTypeInteger;
+		valueValidationMatrix[2][2] = 8;
+		valueValidationMatrix[2][3] = 255;
+		valueValidationMatrix[2][4] = false;
+
+		numCtrls_ = 3;
+	}
+
+	int init()
+	{
+		int ret = SerializationTest::init();
+		if (ret != TestPass)
+			return ret;
+
+		ret = initSubdevice();
+		if (ret < 0)
+			return ret;
+
+		return TestPass;
+	}
+
+	int run()
+	{
+		V4L2ControlList controls;
+
+		controls.add(V4L2_CID_BRIGHTNESS, 255);
+		controls.add(V4L2_CID_CONTRAST, 128);
+		controls.add(V4L2_CID_SATURATION, 50);
+
+		int ret = sensor_->setControls(&controls);
+		if (ret) {
+			cerr << "Failed to set controls" << endl;
+			return ret;
+		}
+
+		initializeValidationMatrix();
+
+		/* Serialize and verify the produced blob size. */
+		std::unique_ptr<DataBlob> blob = controls.serialize();
+		if (!blob) {
+			cerr << "Failed to serialize the control list" << endl;
+			return TestFail;
+		}
+
+		ret = validateValueBlobSize(blob.get());
+		if (ret)
+			return ret;
+
+		/* Validate each serialized data value. */
+		uint8_t *b = blob->data();
+		for (unsigned int i = 0; i < numCtrls_; ++i) {
+			if (!validateValueBlob(b))
+				return TestFail;
+
+			b += VALUE_BLOB_SIZE;
+		}
+
+		/* De-serialize a control list and re-validate it. */
+		V4L2ControlList newList;
+		newList.deserialize(blob->data(), blob->size());
+		for (auto it : newList) {
+			if (!validateDataValue(it.id(), it))
+				return TestFail;
+		}
+
+		/* Does it still work when re-applied to a subdevice? */
+		ret = sensor_->setControls(&newList);
+		if (ret) {
+			cerr << "Failed to set controls" << endl;
+			return ret;
+		}
+
+		return TestPass;
+	}
+};
+
+TEST_REGISTER(V4L2ControlListSerializeTest)
-- 
2.23.0