remove the video converter from vaapi buffer meta

Since all the video converter were deprecated in gstreamer-1.2, we don't need
to handle them anymore in the vaapi's buffer meta.

This patch removes its usage and the buffer meta's API for that.

https://bugzilla.gnome.org/show_bug.cgi?id=745728

gst/vaapi/gstvaapivideobuffer.c

@@ -33,25 +33,6 @@
 #include "gstcompat.h"
 #include "gstvaapivideobuffer.h"
 
-static inline GstBuffer *
-gst_surface_buffer_new (void)
-{
-  return gst_buffer_new ();
-}
-
-static GFunc
-get_surface_converter (GstVaapiDisplay * display)
-{
-  GFunc func;
-
-  switch (gst_vaapi_display_get_class_type (display)) {
-    default:
-      func = NULL;
-      break;
-  }
-  return func;
-}
-
 static GstBuffer *
 new_vbuffer (GstVaapiVideoMeta * meta)
 {
@@ -59,10 +40,7 @@ new_vbuffer (GstVaapiVideoMeta * meta)
 
   g_return_val_if_fail (meta != NULL, NULL);
 
-  gst_vaapi_video_meta_set_surface_converter (meta,
+  buffer = gst_buffer_new ();
-      get_surface_converter (gst_vaapi_video_meta_get_display (meta)));
-
-  buffer = gst_surface_buffer_new ();
   if (buffer)
     gst_buffer_set_vaapi_video_meta (buffer, meta);
   gst_vaapi_video_meta_unref (meta);
@@ -80,7 +58,7 @@ gst_vaapi_video_buffer_new (GstVaapiVideoMeta * meta)
 GstBuffer *
 gst_vaapi_video_buffer_new_empty (void)
 {
-  return gst_surface_buffer_new ();
+  return gst_buffer_new ();
 }
 
 GstBuffer *

gst/vaapi/gstvaapivideometa.c

@@ -588,38 +588,6 @@ gst_vaapi_video_meta_set_surface_proxy (GstVaapiVideoMeta * meta,
   }
 }
 
-/**
- * gst_vaapi_video_meta_get_surface_converter:
- * @meta: a #GstVaapiVideoMeta
- *
- * Retrieves the surface converter bound to the @meta.
- *
- * Return value: the surface converter associated with the video @meta
- */
-GFunc
-gst_vaapi_video_meta_get_surface_converter (GstVaapiVideoMeta * meta)
-{
-  g_return_val_if_fail (GST_VAAPI_IS_VIDEO_META (meta), NULL);
-
-  return meta->converter;
-}
-
-/**
- * gst_vaapi_video_meta_set_surface_converter:
- * @meta: a #GstVaapiVideoMeta
- * @func: a pointer to the surface converter function
- *
- * Sets the @meta surface converter function to @func.
- */
-void
-gst_vaapi_video_meta_set_surface_converter (GstVaapiVideoMeta * meta,
-    GFunc func)
-{
-  g_return_if_fail (GST_VAAPI_IS_VIDEO_META (meta));
-
-  meta->converter = func;
-}
-
 /**
  * gst_vaapi_video_meta_get_render_flags:
  * @meta: a #GstVaapiVideoMeta

gst/vaapi/gstvaapivideometa.h

@@ -106,15 +106,6 @@ void
 gst_vaapi_video_meta_set_surface_proxy (GstVaapiVideoMeta * meta,
     GstVaapiSurfaceProxy * proxy);
 
-G_GNUC_INTERNAL
-GFunc
-gst_vaapi_video_meta_get_surface_converter (GstVaapiVideoMeta * meta);
-
-G_GNUC_INTERNAL
-void
-gst_vaapi_video_meta_set_surface_converter (GstVaapiVideoMeta * meta,
-    GFunc func);
-
 G_GNUC_INTERNAL
 guint
 gst_vaapi_video_meta_get_render_flags (GstVaapiVideoMeta * meta);