libs: window: implements gst_vaapi_window_set_render_rectangle

Implements new vmethod gst_vaapi_window_set_render_rectangle,
which is doing set the information of the rendered rectangle set by
user.
This is necessary on wayland at least to get exact information of
external surface.

And vaapisink calls this when gst_video_overlay_set_render_rectangle is
called.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer-vaapi/-/merge_requests/342>

gst-libs/gst/vaapi/gstvaapiwindow.c

@@ -413,6 +413,32 @@ gst_vaapi_window_get_fullscreen (GstVaapiWindow * window)
   return window->is_fullscreen;
 }
 
+/**
+ * gst_vaapi_window_set_render_rectangle:
+ * @window: a #GstVaapiWindow
+ * @x: the horizontal offset of the render area inside the window
+ * @y: the vertical offset of the render area inside the window
+ * @width: the width of the render area inside the window
+ * @height: the height of the render area inside the window
+ *
+ * Set information of the render area.
+ *
+ * Since: 1.18
+ */
+void
+gst_vaapi_window_set_render_rectangle (GstVaapiWindow * window, gint x, gint y,
+    gint width, gint height)
+{
+  const GstVaapiWindowClass *klass;
+
+  g_return_if_fail (window != NULL);
+
+  klass = GST_VAAPI_WINDOW_GET_CLASS (window);
+
+  if (klass->set_render_rect)
+    klass->set_render_rect (window, x, y, width, height);
+}
+
 /**
  * gst_vaapi_window_set_fullscreen:
  * @window: a #GstVaapiWindow

gst-libs/gst/vaapi/gstvaapiwindow.h

@@ -85,6 +85,10 @@ gst_vaapi_window_set_height (GstVaapiWindow * window, guint height);
 void
 gst_vaapi_window_set_size (GstVaapiWindow * window, guint width, guint height);
 
+void
+gst_vaapi_window_set_render_rectangle (GstVaapiWindow * window, gint x, gint y,
+    gint width, gint height);
+
 gboolean
 gst_vaapi_window_put_surface (GstVaapiWindow * window,
     GstVaapiSurface * surface, const GstVaapiRectangle * src_rect,

gst-libs/gst/vaapi/gstvaapiwindow_priv.h

@@ -129,6 +129,7 @@ struct _GstVaapiWindowClass
   guintptr (*get_colormap) (GstVaapiWindow * window);
   gboolean (*unblock) (GstVaapiWindow * window);
   gboolean (*unblock_cancel) (GstVaapiWindow * window);
+  void (*set_render_rect) (GstVaapiWindow * window, gint x, gint y, gint width, gint height);
 };
 
 GstVaapiWindow *

gst-libs/gst/vaapi/gstvaapiwindow_wayland.c

@@ -531,6 +531,17 @@ gst_vaapi_window_wayland_resize (GstVaapiWindow * window,
   return TRUE;
 }
 
+void
+gst_vaapi_window_wayland_set_render_rect (GstVaapiWindow * window, gint x,
+    gint y, gint width, gint height)
+{
+  GstVaapiWindowWaylandPrivate *const priv =
+      GST_VAAPI_WINDOW_WAYLAND_GET_PRIVATE (window);
+
+  if (priv->video_subsurface)
+    wl_subsurface_set_position (priv->video_subsurface, x, y);
+}
+
 static inline gboolean
 frame_done (FrameState * frame)
 {
@@ -991,6 +1002,7 @@ gst_vaapi_window_wayland_class_init (GstVaapiWindowWaylandClass * klass)
   window_class->set_fullscreen = gst_vaapi_window_wayland_set_fullscreen;
   window_class->unblock = gst_vaapi_window_wayland_unblock;
   window_class->unblock_cancel = gst_vaapi_window_wayland_unblock_cancel;
+  window_class->set_render_rect = gst_vaapi_window_wayland_set_render_rect;
 
   signals[SIZE_CHANGED] = g_signal_new ("size-changed",
       G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, 0, NULL, NULL, NULL,

gst/vaapi/gstvaapisink.c

@@ -633,6 +633,12 @@ gst_vaapisink_video_overlay_set_render_rectangle (GstVideoOverlay * overlay,
   display_rect->width = width;
   display_rect->height = height;
 
+  if (gst_vaapisink_ensure_render_rect (sink, width, height) && sink->window) {
+    gst_vaapi_window_set_render_rectangle (sink->window, x, y, width, height);
+    gst_vaapi_window_set_size (sink->window, width, height);
+    gst_vaapisink_reconfigure_window (sink);
+  }
+
   GST_DEBUG ("render rect (%d,%d):%ux%u",
       display_rect->x, display_rect->y,
       display_rect->width, display_rect->height);