test: v4l2_device: Allow each test to specify which device and entity to test

Prepare for different tests which implements V4L2DeviceTest to specify
which media device and entity they wish to test. There is no functional
changes, all tests still use vivid to perform there tests.

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

test/v4l2_device/buffer_sharing.cpp

@@ -23,9 +23,8 @@ class BufferSharingTest : public V4L2DeviceTest
 {
 public:
 	BufferSharingTest()
-		: output_(nullptr), framesCaptured_(0), framesOutput_(0)
+		: V4L2DeviceTest("vivid", "vivid-000-vid-cap"),
-	{
+		  output_(nullptr), framesCaptured_(0), framesOutput_(0) {}
-	}
 
 protected:
 	int init()

test/v4l2_device/capture_async.cpp

@@ -18,7 +18,7 @@ class CaptureAsyncTest : public V4L2DeviceTest
 {
 public:
 	CaptureAsyncTest()
-		: frames(0){};
+		: V4L2DeviceTest("vivid", "vivid-000-vid-cap"), frames(0) {}
 
 	void receiveBuffer(Buffer *buffer)
 	{

test/v4l2_device/double_open.cpp

@@ -13,6 +13,9 @@ namespace {
 
 class DoubleOpen : public V4L2DeviceTest
 {
+public:
+	DoubleOpen()
+		: V4L2DeviceTest("vivid", "vivid-000-vid-cap") {}
 protected:
 	int run()
 	{

test/v4l2_device/formats.cpp

@@ -17,6 +17,9 @@ using namespace libcamera;
 
 class Format : public V4L2DeviceTest
 {
+public:
+	Format()
+		: V4L2DeviceTest("vivid", "vivid-000-vid-cap") {}
 protected:
 	int run()
 	{

test/v4l2_device/request_buffers.cpp

@@ -9,6 +9,10 @@
 
 class RequestBuffersTest : public V4L2DeviceTest
 {
+public:
+	RequestBuffersTest()
+		: V4L2DeviceTest("vivid", "vivid-000-vid-cap") {}
+
 protected:
 	int run()
 	{

test/v4l2_device/stream_on_off.cpp

@@ -9,6 +9,9 @@
 
 class StreamOnStreamOffTest : public V4L2DeviceTest
 {
+public:
+	StreamOnStreamOffTest()
+		: V4L2DeviceTest("vivid", "vivid-000-vid-cap") {}
 protected:
 	int run()
 	{

test/v4l2_device/v4l2_device_test.cpp

@@ -39,14 +39,14 @@ int V4L2DeviceTest::init()
 		return TestFail;
 	}
 
-	DeviceMatch dm("vivid");
+	DeviceMatch dm(driver_);
-	dm.add("vivid-000-vid-cap");
+	dm.add(entity_);
 
 	media_ = enumerator_->search(dm);
 	if (!media_)
 		return TestSkip;
 
-	MediaEntity *entity = media_->getEntityByName("vivid-000-vid-cap");
+	MediaEntity *entity = media_->getEntityByName(entity_);
 	if (!entity)
 		return TestSkip;
 

test/v4l2_device/v4l2_device_test.h

@@ -22,8 +22,8 @@ using namespace libcamera;
 class V4L2DeviceTest : public Test
 {
 public:
-	V4L2DeviceTest()
+	V4L2DeviceTest(const char *driver, const char *entity)
-		: capture_(nullptr)
+		: driver_(driver), entity_(entity), capture_(nullptr)
 	{
 	}
 
@@ -31,6 +31,8 @@ protected:
 	int init();
 	void cleanup();
 
+	std::string driver_;
+	std::string entity_;
 	std::unique_ptr<DeviceEnumerator> enumerator_;
 	std::shared_ptr<MediaDevice> media_;
 	V4L2Device *capture_;