test: stream: Add test for StreamFormat

Test that both discrete and range based stream format descriptions
result in good discrete frame sizes. The range based stream formats
needs to be fitted with a table of resolutions inside libcamera so if
that table is updated this test might need to be updated.

Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

test/stream/stream_formats.cpp

@@ -0,0 +1,101 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2019, Google Inc.
+ *
+ * stream_formats.cpp - StreamFormats test
+ */
+
+#include <iostream>
+
+#include <libcamera/geometry.h>
+#include <libcamera/stream.h>
+
+#include "test.h"
+
+using namespace std;
+using namespace libcamera;
+
+class StreamFormatsTest : public Test
+{
+protected:
+	int testSizes(std::string name, std::vector<Size> test, std::vector<Size> valid)
+	{
+		bool pass = false;
+
+		for (Size &size : test) {
+			pass = false;
+
+			for (Size &validSize : valid) {
+				if (size == validSize) {
+					pass = true;
+					break;
+				}
+			}
+
+			if (!pass)
+				break;
+		}
+
+		if (!pass) {
+			cout << "Failed " << name << endl;
+			cout << "Sizes to test:" << endl;
+			for (Size &size : test)
+				cout << size.toString() << endl;
+			cout << "Valid sizes:" << endl;
+			for (Size &size : valid)
+				cout << size.toString() << endl;
+
+			return TestFail;
+		}
+
+		return TestPass;
+	}
+
+	int run()
+	{
+		/* Test discrete sizes */
+		StreamFormats discrete({
+			{ 1, { SizeRange(100, 100), SizeRange(200, 200) } },
+			{ 2, { SizeRange(300, 300), SizeRange(400, 400) } },
+		});
+
+		if (testSizes("discrete 1", discrete.sizes(1),
+			      { Size(100, 100), Size(200, 200) }))
+			return TestFail;
+		if (testSizes("discrete 2", discrete.sizes(2),
+			      { Size(300, 300), Size(400, 400) }))
+			return TestFail;
+
+		/* Test range sizes */
+		StreamFormats range({
+			{ 1, { SizeRange(640, 480, 640, 480) } },
+			{ 2, { SizeRange(640, 480, 800, 600, 8, 8) } },
+			{ 3, { SizeRange(640, 480, 800, 600, 16, 16) } },
+			{ 4, { SizeRange(128, 128, 4096, 4096, 128, 128) } },
+		});
+
+		if (testSizes("range 1", range.sizes(1), { Size(640, 480) }))
+			return TestFail;
+
+		if (testSizes("range 2", range.sizes(2), {
+			      Size(640, 480), Size(720, 480),
+			      Size(720, 576), Size(768, 480),
+			      Size(800, 600) }))
+			return TestFail;
+
+		if (testSizes("range 3", range.sizes(3), {
+			      Size(640, 480), Size(720, 480),
+			      Size(720, 576), Size(768, 480) }))
+			return TestFail;
+
+		if (testSizes("range 4", range.sizes(4), {
+			      Size(1024, 768), Size(1280, 1024),
+			      Size(2048, 1152), Size(2048, 1536),
+			      Size(2560, 2048), Size(3200, 2048), }))
+			return TestFail;
+
+		return TestPass;
+	}
+};
+
+TEST_REGISTER(StreamFormatsTest)