gstreamer GST_BOILERPLATE_FULL 分析

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..../gstutils.h 定义了GST_BOILERPLATE_FULL，针对v4l2src的分析，展开如下：

#define GST_BOILERPLATE_FULL(GstV4l2Src, gst_v4l2src, GstPushSrc, GST_TYPE_PUSH_SRC, gst_v4l2src_init_interfaces)

---------------->
static void gst_v4l2src_base_init     (gpointer      g_class);
static void gst_v4l2src_class_init    (GstV4l2SrcClass *g_class);
static void gst_v4l2src_init        (GstV4l2Src   *object, GstV4l2SrcClass *g_class);
static GstPushSrcClass *parent_class = NULL;

static void
GstV4l2Src_class_init_trampoline (gpointer g_class,  gpointer data)
{
       parent_class = (GstPushSrcClass *)
      g_type_class_peek_parent (g_class);
      gst_v4l2src_class_init ((GstV4l2SrcClass *)g_class);
}

GType gst_v4l2src_get_type (void);

GType
gst_v4l2src_get_type (void)
{
/* The typedef for GType may be gulong or gsize, depending on the
   * system and whether the compiler is c++ or not. The g_once_init_*
   * functions always take a gsize * though ... */
static volatile gsize gonce_data = 0;     \

if (g_once_init_enter (&gonce_data)) {
GType _type;
_type = gst_type_register_static_full (GST_TYPE_PUSH_SRC, g_intern_static_string (GstV4l2Src),

        sizeof (GstV4l2Src,Class),
        gst_v4l2src_base_init,
        NULL,    /* base_finalize */
       gst_v4l2src_class_init_trampoline,
        NULL,    /* class_finalize */
        NULL,               /* class_data */
        sizeof (type),
        0,                  /* n_preallocs */
        (GInstanceInitFunc) gst_v4l2src_init,
        NULL,
        (GTypeFlags) 0);
    gst_v4l2src_init_interfaces(_type);
    g_once_init_leave (&gonce_data, (gsize) _type);
}
return (GType) gonce_data;
}

通过g_type_register_static 注册。