interfacing gobject with C++

Question

I’m trying to create a custom audio sink plugin for gstreamer using the Gst::AudioSink as a base class. For me this involves multiple learning curves as I’m new to gstreamer, gs

Answer 1

You can find examples of writing your own plugin in the repository: https://git.gnome.org/browse/gstreamermm/tree/tests/plugins/derivedfrombasetransform.h

In general, your header looks ok, and full implementation should look (more or less) like that:

class MyAudioSink: public Gst::AudioSink
{
public:
    explicit MyAudioSink(KantarAudioSink *gobj)
        : Glib::ObjectBase(typeid (MyAudioSink)),
          Gst::AudioSink(gobj) {}

    static void class_init(Gst::ElementClass *klass)
    {
        // Y
        klass->set_metadata("longname", "classification", "description", "author");

        klass->add_pad_template(Gst::PadTemplate::create("sink", Gst::PAD_SINK, Gst::PAD_ALWAYS, Gst::Caps::create_any()));
    }

    virtual int write_vfunc(gpointer data, guint length) override {}
    virtual void reset_vfunc() {}
};

Very recently we had a bug report when someone posted very nice, tiny example of audiofilter plugin, you can use it as an example for your project as well: https://bug794249.bugzilla-attachments.gnome.org/attachment.cgi?id=369564

If this doesn't work, feel free to file a bug here: https://bugzilla.gnome.org/enter_bug.cgi?product=gstreamermm