test: v4l2_subdevice: Add ListFormat test

Add test to list formats on a v4l2 subdevice.

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>

test/v4l2_subdevice/list_formats.cpp

@@ -0,0 +1,81 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2019, Google Inc.
+ *
+ * libcamera V4L2 Subdevice format handling test
+ */
+
+#include <iomanip>
+#include <iostream>
+#include <vector>
+
+#include "geometry.h"
+#include "v4l2_subdevice.h"
+#include "v4l2_subdevice_test.h"
+
+using namespace std;
+using namespace libcamera;
+
+/* List image formats on the "Scaler" subdevice of vimc media device.  */
+
+class ListFormatsTest : public V4L2SubdeviceTest
+{
+protected:
+	int run() override;
+
+private:
+	void printFormats(unsigned int pad, unsigned code,
+			  std::vector<SizeRange> &formats);
+};
+
+void ListFormatsTest::printFormats(unsigned int pad,
+				   unsigned int code,
+				   std::vector<SizeRange> &sizes)
+{
+	cout << "Enumerate formats on pad " << pad << endl;
+	for (SizeRange &size : sizes) {
+		cout << "	mbus code: 0x" << setfill('0') << setw(4)
+		     << hex << code << endl;
+		cout << "	min width: " << dec << size.minWidth << endl;
+		cout << "	min height: " << dec << size.minHeight << endl;
+		cout << "	max width: " << dec << size.maxWidth << endl;
+		cout << "	max height: " << dec << size.maxHeight << endl;
+	}
+}
+
+int ListFormatsTest::run()
+{
+	/* List all formats available on existing "Scaler" pads. */
+	std::map<unsigned int, std::vector<SizeRange>> formats;
+
+	formats = scaler_->formats(0);
+	if (formats.empty()) {
+		cerr << "Failed to list formats on pad 0 of subdevice "
+		     << scaler_->deviceName() << endl;
+		return TestFail;
+	}
+	for (auto it = formats.begin(); it != formats.end(); ++it)
+		printFormats(0, it->first, it->second);
+
+	formats = scaler_->formats(1);
+	if (formats.empty()) {
+		cerr << "Failed to list formats on pad 1 of subdevice "
+		     << scaler_->deviceName() << endl;
+		return TestFail;
+	}
+	for (auto it = formats.begin(); it != formats.end(); ++it)
+		printFormats(1, it->first, it->second);
+
+	/* List format on a non-existing pad, format vector shall be empty. */
+	formats = scaler_->formats(2);
+	if (!formats.empty()) {
+		cerr << "Listing formats on non-existing pad 2 of subdevice "
+		     << scaler_->deviceName()
+		     << " should return an empty format list" << endl;
+		return TestFail;
+	}
+
+	return TestPass;
+}
+
+TEST_REGISTER(ListFormatsTest);

test/v4l2_subdevice/meson.build

@@ -1,4 +1,5 @@
 v4l2_subdevice_tests = [
+  [ 'list_formats',             'list_formats.cpp'],
   [ 'test_formats',             'test_formats.cpp'],
 ]