LCamDev: implement configureSessionModeCReq

We can, theoretically, now change the v4l camera's mode.

commonLibs/lcameraDev/tests/planarYuvFormatPolicy_tests.cpp

@@ -0,0 +1,71 @@
+#include <planarYuvFormatPolicy.h>
+#include <gtest/gtest.h>
+#include <libcamera/formats.h>
+#include <support/exceptionAssertions.h>
+#include <vector>
+
+namespace lcamera_dev {
+namespace {
+
+using libcamera::formats::NV12;
+using libcamera::formats::YUYV;
+using libcamera::formats::YUV420;
+
+TEST(PlanarYuvFormatPolicyTest, FullyPlanarRequiredPicksYuv420OverNv12)
+{
+	const std::vector<libcamera::PixelFormat> candidates = {YUV420, NV12};
+
+	const std::optional<libcamera::PixelFormat> selected =
+		selectYuvCaptureFormat(candidates, false);
+
+	EXPECT_TRUE(selected.has_value());
+	EXPECT_EQ(*selected, YUV420);
+	EXPECT_TRUE(isFullyPlanarYuv(*selected));
+}
+
+TEST(PlanarYuvFormatPolicyTest, FullyPlanarRequiredThrowsWhenOnlyNonPlanar)
+{
+	const std::vector<libcamera::PixelFormat> candidates = {NV12, YUYV};
+
+	try {
+		selectYuvCaptureFormat(candidates, false);
+		FAIL() << "Expected runtime_error";
+	}
+	catch (const std::runtime_error& exception)
+	{
+		sscl::tests::expectExceptionMessageContains(
+			exception,
+			"planar");
+	}
+}
+
+TEST(PlanarYuvFormatPolicyTest, FullyPlanarOptionalPicksNv12)
+{
+	const std::vector<libcamera::PixelFormat> candidates = {NV12};
+
+	const std::optional<libcamera::PixelFormat> selected =
+		selectYuvCaptureFormat(candidates, true);
+
+	EXPECT_TRUE(selected.has_value());
+	EXPECT_EQ(*selected, NV12);
+	EXPECT_FALSE(isFullyPlanarYuv(*selected));
+	EXPECT_EQ(yuvCapturePlaneCount(*selected), 2u);
+}
+
+TEST(PlanarYuvFormatPolicyTest, EmptyCandidateListThrows)
+{
+	const std::vector<libcamera::PixelFormat> candidates;
+
+	EXPECT_THROW(
+		selectYuvCaptureFormat(candidates, false),
+		std::runtime_error);
+}
+
+TEST(PlanarYuvFormatPolicyTest, IsFullyPlanarYuvRecognizesYuv420)
+{
+	EXPECT_TRUE(isFullyPlanarYuv(YUV420));
+	EXPECT_FALSE(isFullyPlanarYuv(NV12));
+}
+
+} // namespace
+} // namespace lcamera_dev