From: Martin Ling <redacted>
Date: Sun, 30 Dec 2018 01:01:43 +0000 (+0100)
Subject: WIP on plugin registration.
X-Git-Url: https://sigrok.org/gitaction?a=commitdiff_plain;h=6d71d36a6150cc76ac2408a7a41dcd473328e4fa;p=libsigrokflow.git

WIP on plugin registration.
---

diff --git a/include/libsigrokflow/libsigrokflow.hpp b/include/libsigrokflow/libsigrokflow.hpp
index 4f0fcdb..2c13cb4 100644
--- a/include/libsigrokflow/libsigrokflow.hpp
+++ b/include/libsigrokflow/libsigrokflow.hpp
@@ -39,18 +39,24 @@ class GstBlock :
         public Gst::Element
 {
         /* Operations specific to sigrok GStreamer blocks go here. */
+protected:
+        explicit GstBlock(GstElement *gobj);
 };
 
 class Device :
         public GstBlock
 {
         /* Operations specific to hardware devices go here */
+protected:
+        explicit Device(GstElement *gobj);
 };
 
 class CaptureDevice :
         public Device
 {
         /* Operations specific to capture (source) devices go here */
+protected:
+        explicit CaptureDevice(GstElement *gobj);
 };
 
 class LegacyCaptureDevice :
@@ -66,6 +72,15 @@ public:
 
         /* Override state change */
         Gst::StateChangeReturn change_state_vfunc(Gst::StateChange transition);
+
+        /* Gst class init */
+        static void class_init(Gst::ElementClass<LegacyCaptureDevice> *klass);
+
+        /* Register class with plugin */
+        static bool register_element(Glib::RefPtr<Gst::Plugin> plugin);
+
+        /* Construcor used by element factory */
+        explicit LegacyCaptureDevice(GstElement *gobj);
 private:
         shared_ptr<sigrok::HardwareDevice> _libsigrok_device;
         Glib::RefPtr<Gst::Pad> _src_pad;
diff --git a/src/main.cpp b/src/main.cpp
index ead3446..c611157 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -30,6 +30,39 @@ using namespace std::placeholders;
 
 void init()
 {
+	Gst::Plugin::register_static(GST_VERSION_MAJOR, GST_VERSION_MINOR,
+			"sigrok_legacy_capture_device",
+			"Wrapper for capture devices using legacy libsigrok APIs",
+			sigc::ptr_fun(&LegacyCaptureDevice::register_element),
+			"0.01", "GPLv3+", "sigrok", "libsigrokflow", "http://sigrok.org");
+}
+
+void LegacyCaptureDevice::class_init(Gst::ElementClass<LegacyCaptureDevice> *klass)
+{
+	klass->set_metadata("sigrok legacy capture device",
+			"Source", "Wrapper for capture devices using legacy libsigrok APIs",
+			"Martin Ling");
+
+	klass->add_pad_template(Gst::PadTemplate::create(
+			"src",
+			Gst::PAD_SRC,
+			Gst::PAD_ALWAYS,
+			Gst::Caps::create_any()));
+}
+
+bool LegacyCaptureDevice::register_element(Glib::RefPtr<Gst::Plugin> plugin)
+{
+	Gst::ElementFactory::register_element(plugin, "sigrok_legacy_capture_device",
+			0, Gst::register_mm_type<LegacyCaptureDevice>(
+				"sigrok_legacy_capture_device"));
+	return true;
+}
+
+LegacyCaptureDevice::LegacyCaptureDevice(GstElement *gobj) :
+	Glib::ObjectBase(typeid(LegacyCaptureDevice)),
+	CaptureDevice(gobj)
+{
+	add_pad(_src_pad = Gst::Pad::create(get_pad_template("src"), "src"));
 }
 
 Glib::RefPtr<LegacyCaptureDevice>LegacyCaptureDevice::create(
@@ -39,13 +72,6 @@ Glib::RefPtr<LegacyCaptureDevice>LegacyCaptureDevice::create(
 	if (!element)
 		throw runtime_error("Failed to create element - plugin not registered?");
 	auto device = Glib::RefPtr<LegacyCaptureDevice>::cast_static(element);
-
-	auto src_template = Gst::PadTemplate::create("src",
-			Gst::PAD_SRC,
-			Gst::PAD_ALWAYS,
-			Gst::Caps::create_any());
-	device->_src_pad = Gst::Pad::create(src_template);
-	device->add_pad(device->_src_pad);
 	device->_libsigrok_device = libsigrok_device;
 	return device;
 }