libcamera: stream: Turn StreamRole into scoped enumeration

The StreamRole enum has enumerators such as 'Raw' that are too generic
to be in the global libcamera namespace. Turn it into a scoped enum to
avoid namespace clashes, and update users accordingly.

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

include/libcamera/stream.h

@@ -62,7 +62,7 @@ private:
 	StreamFormats formats_;
 };
 
-enum StreamRole {
+enum class StreamRole {
 	Raw,
 	StillCapture,
 	VideoRecording,

src/android/camera_capabilities.cpp

@@ -488,7 +488,7 @@ int CameraCapabilities::initializeStreamConfigurations()
 	 * \todo Get this from the camera properties once defined
 	 */
 	std::unique_ptr<CameraConfiguration> cameraConfig =
-		camera_->generateConfiguration({ StillCapture });
+		camera_->generateConfiguration({ StreamRole::StillCapture });
 	if (!cameraConfig) {
 		LOG(HAL, Error) << "Failed to get maximum resolution";
 		return -EINVAL;

src/apps/lc-compliance/capture_test.cpp

@@ -16,7 +16,12 @@
 using namespace libcamera;
 
 const std::vector<int> NUMREQUESTS = { 1, 2, 3, 5, 8, 13, 21, 34, 55, 89 };
-const std::vector<StreamRole> ROLES = { Raw, StillCapture, VideoRecording, Viewfinder };
+const std::vector<StreamRole> ROLES = {
+	StreamRole::Raw,
+	StreamRole::StillCapture,
+	StreamRole::VideoRecording,
+	StreamRole::Viewfinder
+};
 
 class SingleStream : public testing::TestWithParam<std::tuple<StreamRole, int>>
 {
@@ -54,10 +59,12 @@ void SingleStream::TearDown()
 
 std::string SingleStream::nameParameters(const testing::TestParamInfo<SingleStream::ParamType> &info)
 {
-	std::map<StreamRole, std::string> rolesMap = { { Raw, "Raw" },
+	std::map<StreamRole, std::string> rolesMap = {
-						       { StillCapture, "StillCapture" },
+		{ StreamRole::Raw, "Raw" },
-						       { VideoRecording, "VideoRecording" },
+		{ StreamRole::StillCapture, "StillCapture" },
-						       { Viewfinder, "Viewfinder" } };
+		{ StreamRole::VideoRecording, "VideoRecording" },
+		{ StreamRole::Viewfinder, "Viewfinder" }
+	};
 
 	std::string roleName = rolesMap[std::get<0>(info.param)];
 	std::string numRequestsName = std::to_string(std::get<1>(info.param));

src/gstreamer/gstlibcamerapad.cpp

@@ -54,7 +54,7 @@ gst_libcamera_pad_get_property(GObject *object, guint prop_id, GValue *value,
 
 	switch (prop_id) {
 	case PROP_STREAM_ROLE:
-		g_value_set_enum(value, self->role);
+		g_value_set_enum(value, static_cast<gint>(self->role));
 		break;
 	default:
 		G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
@@ -87,9 +87,19 @@ gst_libcamera_stream_role_get_type()
 {
 	static GType type = 0;
 	static const GEnumValue values[] = {
-		{ StillCapture, "libcamera::StillCapture", "still-capture" },
+		{
-		{ VideoRecording, "libcamera::VideoRecording", "video-recording" },
+			static_cast<gint>(StreamRole::StillCapture),
-		{ Viewfinder, "libcamera::Viewfinder", "view-finder" },
+			"libcamera::StillCapture",
+			"still-capture",
+		}, {
+			static_cast<gint>(StreamRole::VideoRecording),
+			"libcamera::VideoRecording",
+			"video-recording",
+		}, {
+			static_cast<gint>(StreamRole::Viewfinder),
+			"libcamera::Viewfinder",
+			"view-finder",
+		},
 		{ 0, NULL, NULL }
 	};
 
@@ -110,7 +120,7 @@ gst_libcamera_pad_class_init(GstLibcameraPadClass *klass)
 	auto *spec = g_param_spec_enum("stream-role", "Stream Role",
 				       "The selected stream role",
 				       gst_libcamera_stream_role_get_type(),
-				       VideoRecording,
+				       static_cast<gint>(StreamRole::VideoRecording),
 				       (GParamFlags)(GST_PARAM_MUTABLE_READY
 					             | G_PARAM_CONSTRUCT
 						     | G_PARAM_READWRITE

src/libcamera/pipeline/imx8-isi/imx8-isi.cpp

@@ -599,7 +599,7 @@ PipelineHandlerISI::generateConfiguration(Camera *camera,
 		Size size;
 
 		switch (role) {
-		case StillCapture:
+		case StreamRole::StillCapture:
 			/*
 			 * \todo Make sure the sensor can produce non-RAW formats
 			 * compatible with the ones supported by the pipeline.
@@ -608,8 +608,8 @@ PipelineHandlerISI::generateConfiguration(Camera *camera,
 			pixelFormat = formats::YUYV;
 			break;
 
-		case Viewfinder:
+		case StreamRole::Viewfinder:
-		case VideoRecording:
+		case StreamRole::VideoRecording:
 			/*
 			 * \todo Make sure the sensor can produce non-RAW formats
 			 * compatible with the ones supported by the pipeline.
@@ -618,7 +618,7 @@ PipelineHandlerISI::generateConfiguration(Camera *camera,
 			pixelFormat = formats::YUYV;
 			break;
 
-		case Raw: {
+		case StreamRole::Raw: {
 			/*
 			 * Make sure the sensor can generate a RAW format and
 			 * prefer the ones with a larger bitdepth.