window: add generic helper to create windows.

Add a new generic helper function gst_vaapi_window_new() to create
a window without having the caller to check for the display type
himself. i.e. internally, there is now a GstVaapiDisplayClass hook
to create windows, and the actual backend implementation fills it in.
Add new generic helper functions gst_vaapi_texture_new_wrapped()

This is a simplification in view to supporting EGL.

gst-libs/gst/vaapi/gstvaapidisplay_drm.c

@@ -36,6 +36,7 @@
 #include "gstvaapidisplay_priv.h"
 #include "gstvaapidisplay_drm.h"
 #include "gstvaapidisplay_drm_priv.h"
+#include "gstvaapiwindow_drm.h"
 
 #define DEBUG 1
 #include "gstvaapidebug.h"
@@ -312,6 +313,14 @@ gst_vaapi_display_drm_get_display_info (GstVaapiDisplay * display,
   return TRUE;
 }
 
+static GstVaapiWindow *
+gst_vaapi_display_drm_create_window (GstVaapiDisplay * display, GstVaapiID id,
+    guint width, guint height)
+{
+  return id != GST_VAAPI_ID_INVALID ?
+      NULL : gst_vaapi_window_drm_new (display, width, height);
+}
+
 static void
 gst_vaapi_display_drm_init (GstVaapiDisplay * display)
 {
@@ -337,6 +346,7 @@ gst_vaapi_display_drm_class_init (GstVaapiDisplayDRMClass * klass)
   dpy_class->open_display = gst_vaapi_display_drm_open_display;
   dpy_class->close_display = gst_vaapi_display_drm_close_display;
   dpy_class->get_display = gst_vaapi_display_drm_get_display_info;
+  dpy_class->create_window = gst_vaapi_display_drm_create_window;
 }
 
 static inline const GstVaapiDisplayClass *

gst-libs/gst/vaapi/gstvaapidisplay_glx.c

@@ -35,6 +35,7 @@
 #include "gstvaapidisplay_x11_priv.h"
 #include "gstvaapidisplay_glx.h"
 #include "gstvaapidisplay_glx_priv.h"
+#include "gstvaapiwindow_glx.h"
 #include "gstvaapitexture_glx.h"
 
 #define DEBUG 1
@@ -42,6 +43,15 @@
 
 static const guint g_display_types = 1U << GST_VAAPI_DISPLAY_TYPE_GLX;
 
+static GstVaapiWindow *
+gst_vaapi_display_glx_create_window (GstVaapiDisplay * display, GstVaapiID id,
+    guint width, guint height)
+{
+  return id != GST_VAAPI_ID_INVALID ?
+      gst_vaapi_window_glx_new_with_xid (display, id) :
+      gst_vaapi_window_glx_new (display, width, height);
+}
+
 static GstVaapiTexture *
 gst_vaapi_display_glx_create_texture (GstVaapiDisplay * display, GstVaapiID id,
     guint target, guint format, guint width, guint height)
@@ -62,6 +72,7 @@ gst_vaapi_display_glx_class_init (GstVaapiDisplayGLXClass * klass)
 
   object_class->size = sizeof (GstVaapiDisplayGLX);
   dpy_class->display_type = GST_VAAPI_DISPLAY_TYPE_GLX;
+  dpy_class->create_window = gst_vaapi_display_glx_create_window;
   dpy_class->create_texture = gst_vaapi_display_glx_create_texture;
 }
 

gst-libs/gst/vaapi/gstvaapidisplay_priv.h

@@ -27,6 +27,7 @@
 
 #include <gst/vaapi/gstvaapidisplay.h>
 #include <gst/vaapi/gstvaapidisplaycache.h>
+#include <gst/vaapi/gstvaapiwindow.h>
 #include <gst/vaapi/gstvaapitexture.h>
 #include "gstvaapiminiobject.h"
 
@@ -67,6 +68,8 @@ typedef void (*GstVaapiDisplayGetSizeFunc) (GstVaapiDisplay * display,
     guint * pwidth, guint * pheight);
 typedef void (*GstVaapiDisplayGetSizeMFunc) (GstVaapiDisplay * display,
     guint * pwidth, guint * pheight);
+typedef GstVaapiWindow *(*GstVaapiDisplayCreateWindowFunc) (
+    GstVaapiDisplay * display, GstVaapiID id, guint width, guint height);
 typedef GstVaapiTexture *(*GstVaapiDisplayCreateTextureFunc) (
     GstVaapiDisplay * display, GstVaapiID id, guint target, guint format,
     guint width, guint height);
@@ -187,6 +190,7 @@ struct _GstVaapiDisplay
  * @get_display: virtual function to retrieve the #GstVaapiDisplayInfo
  * @get_size: virtual function to retrieve the display dimensions, in pixels
  * @get_size_mm: virtual function to retrieve the display dimensions, in millimeters
+ * @create_window: (optional) virtual function to create a window
  * @create_texture: (optional) virtual function to create a texture
  *
  * Base class for VA displays.
@@ -212,6 +216,7 @@ struct _GstVaapiDisplayClass
   GstVaapiDisplayGetSizeFunc get_size;
   GstVaapiDisplayGetSizeMFunc get_size_mm;
 
+  GstVaapiDisplayCreateWindowFunc create_window;
   GstVaapiDisplayCreateTextureFunc create_texture;
 };
 

gst-libs/gst/vaapi/gstvaapidisplay_wayland.c

@@ -31,6 +31,7 @@
 #include "gstvaapidisplay_priv.h"
 #include "gstvaapidisplay_wayland.h"
 #include "gstvaapidisplay_wayland_priv.h"
+#include "gstvaapiwindow_wayland.h"
 
 #define DEBUG 1
 #include "gstvaapidebug.h"
@@ -320,6 +321,15 @@ gst_vaapi_display_wayland_get_size_mm (GstVaapiDisplay * display,
     *pheight = priv->phys_height;
 }
 
+static GstVaapiWindow *
+gst_vaapi_display_wayland_create_window (GstVaapiDisplay * display,
+    GstVaapiID id, guint width, guint height)
+{
+  return id != GST_VAAPI_ID_INVALID ?
+      NULL :
+      gst_vaapi_window_wayland_new (display, width, height);
+}
+
 static void
 gst_vaapi_display_wayland_init (GstVaapiDisplay * display)
 {
@@ -347,6 +357,7 @@ gst_vaapi_display_wayland_class_init (GstVaapiDisplayWaylandClass * klass)
   dpy_class->get_display = gst_vaapi_display_wayland_get_display_info;
   dpy_class->get_size = gst_vaapi_display_wayland_get_size;
   dpy_class->get_size_mm = gst_vaapi_display_wayland_get_size_mm;
+  dpy_class->create_window = gst_vaapi_display_wayland_create_window;
 }
 
 static inline const GstVaapiDisplayClass *

gst-libs/gst/vaapi/gstvaapidisplay_x11.c

@@ -33,6 +33,7 @@
 #include "gstvaapidisplay_priv.h"
 #include "gstvaapidisplay_x11.h"
 #include "gstvaapidisplay_x11_priv.h"
+#include "gstvaapiwindow_x11.h"
 
 #ifdef HAVE_XRANDR
 # include <X11/extensions/Xrandr.h>
@@ -368,6 +369,15 @@ gst_vaapi_display_x11_get_size_mm (GstVaapiDisplay * display,
     *pheight = height_mm;
 }
 
+static GstVaapiWindow *
+gst_vaapi_display_x11_create_window (GstVaapiDisplay * display, GstVaapiID id,
+    guint width, guint height)
+{
+  return id != GST_VAAPI_ID_INVALID ?
+      gst_vaapi_window_x11_new_with_xid (display, id) :
+      gst_vaapi_window_x11_new (display, width, height);
+}
+
 void
 gst_vaapi_display_x11_class_init (GstVaapiDisplayX11Class * klass)
 {
@@ -387,6 +397,7 @@ gst_vaapi_display_x11_class_init (GstVaapiDisplayX11Class * klass)
   dpy_class->get_display = gst_vaapi_display_x11_get_display_info;
   dpy_class->get_size = gst_vaapi_display_x11_get_size;
   dpy_class->get_size_mm = gst_vaapi_display_x11_get_size_mm;
+  dpy_class->create_window = gst_vaapi_display_x11_create_window;
 }
 
 static inline const GstVaapiDisplayClass *

gst-libs/gst/vaapi/gstvaapiwindow.c

@@ -30,6 +30,7 @@
 #include "sysdeps.h"
 #include "gstvaapiwindow.h"
 #include "gstvaapiwindow_priv.h"
+#include "gstvaapidisplay_priv.h"
 #include "gstvaapisurface_priv.h"
 
 #define DEBUG 1
@@ -74,20 +75,26 @@ gst_vaapi_window_create (GstVaapiWindow * window, guint width, guint height)
 }
 
 GstVaapiWindow *
-gst_vaapi_window_new (const GstVaapiWindowClass * window_class,
-    GstVaapiDisplay * display, guint width, guint height)
+gst_vaapi_window_new_internal (const GstVaapiWindowClass * window_class,
+    GstVaapiDisplay * display, GstVaapiID id, guint width, guint height)
 {
   GstVaapiWindow *window;
 
-  g_return_val_if_fail (width > 0, NULL);
-  g_return_val_if_fail (height > 0, NULL);
+  if (id != GST_VAAPI_ID_INVALID) {
+    g_return_val_if_fail (width == 0, NULL);
+    g_return_val_if_fail (height == 0, NULL);
+  } else {
+    g_return_val_if_fail (width > 0, NULL);
+    g_return_val_if_fail (height > 0, NULL);
+  }
 
   window = gst_vaapi_object_new (GST_VAAPI_OBJECT_CLASS (window_class),
       display);
   if (!window)
     return NULL;
 
-  GST_VAAPI_OBJECT_ID (window) = 0;
+  window->use_foreign_window = id != GST_VAAPI_ID_INVALID;
+  GST_VAAPI_OBJECT_ID (window) = window->use_foreign_window ? id : 0;
   if (!gst_vaapi_window_create (window, width, height))
     goto error;
   return window;
@@ -97,26 +104,29 @@ error:
   return NULL;
 }
 
+/**
+ * gst_vaapi_window_new:
+ * @display: a #GstVaapiDisplay
+ * @width: the requested window width, in pixels
+ * @height: the requested windo height, in pixels
+ *
+ * Creates a window with the specified @width and @height. The window
+ * will be attached to the @display and remains invisible to the user
+ * until gst_vaapi_window_show() is called.
+ *
+ * Return value: the newly allocated #GstVaapiWindow object
+ */
 GstVaapiWindow *
-gst_vaapi_window_new_from_native (const GstVaapiWindowClass * window_class,
-    GstVaapiDisplay * display, gpointer native_window)
+gst_vaapi_window_new (GstVaapiDisplay * display, guint width, guint height)
 {
-  GstVaapiWindow *window;
+  GstVaapiDisplayClass *dpy_class;
 
-  window = gst_vaapi_object_new (GST_VAAPI_OBJECT_CLASS (window_class),
-      display);
-  if (!window)
+  g_return_val_if_fail (display != NULL, NULL);
+
+  dpy_class = GST_VAAPI_DISPLAY_GET_CLASS (display);
+  if (G_UNLIKELY (!dpy_class->create_window))
     return NULL;
-
-  GST_VAAPI_OBJECT_ID (window) = GPOINTER_TO_SIZE (native_window);
-  window->use_foreign_window = TRUE;
-  if (!gst_vaapi_window_create (window, 0, 0))
-    goto error;
-  return window;
-
-error:
-  gst_vaapi_window_unref_internal (window);
-  return NULL;
+  return dpy_class->create_window (display, GST_VAAPI_ID_INVALID, width, height);
 }
 
 /**

gst-libs/gst/vaapi/gstvaapiwindow.h

@@ -40,6 +40,9 @@ G_BEGIN_DECLS
 typedef struct _GstVaapiWindow GstVaapiWindow;
 typedef struct _GstVaapiWindowClass GstVaapiWindowClass;
 
+GstVaapiWindow *
+gst_vaapi_window_new (GstVaapiDisplay * display, guint width, guint height);
+
 GstVaapiWindow *
 gst_vaapi_window_ref (GstVaapiWindow * window);
 

gst-libs/gst/vaapi/gstvaapiwindow_drm.c

@@ -137,6 +137,7 @@ gst_vaapi_window_drm_new (GstVaapiDisplay * display, guint width, guint height)
   g_return_val_if_fail (GST_VAAPI_IS_DISPLAY_DRM (display), NULL);
 
   return
-      gst_vaapi_window_new (GST_VAAPI_WINDOW_CLASS (gst_vaapi_window_drm_class
-          ()), display, width, height);
+      gst_vaapi_window_new_internal (GST_VAAPI_WINDOW_CLASS
+      (gst_vaapi_window_drm_class ()), display, GST_VAAPI_ID_INVALID, width,
+      height);
 }

gst-libs/gst/vaapi/gstvaapiwindow_glx.c

@@ -347,8 +347,9 @@ gst_vaapi_window_glx_new (GstVaapiDisplay * display, guint width, guint height)
   g_return_val_if_fail (GST_VAAPI_IS_DISPLAY_GLX (display), NULL);
 
   window =
-      gst_vaapi_window_new (GST_VAAPI_WINDOW_CLASS (gst_vaapi_window_glx_class
-          ()), display, width, height);
+      gst_vaapi_window_new_internal (GST_VAAPI_WINDOW_CLASS
+      (gst_vaapi_window_glx_class ()), display, GST_VAAPI_ID_INVALID, width,
+      height);
   if (!window)
     return NULL;
 
@@ -384,8 +385,8 @@ gst_vaapi_window_glx_new_with_xid (GstVaapiDisplay * display, Window xid)
   g_return_val_if_fail (xid != None, NULL);
 
   window =
-      gst_vaapi_window_new_from_native (GST_VAAPI_WINDOW_CLASS
-      (gst_vaapi_window_glx_class ()), display, GINT_TO_POINTER (xid));
+      gst_vaapi_window_new_internal (GST_VAAPI_WINDOW_CLASS
+      (gst_vaapi_window_glx_class ()), display, xid, 0, 0);
   if (!window)
     return NULL;
 

gst-libs/gst/vaapi/gstvaapiwindow_priv.h

@@ -102,12 +102,8 @@ struct _GstVaapiWindowClass
 };
 
 GstVaapiWindow *
-gst_vaapi_window_new (const GstVaapiWindowClass * window_class,
-    GstVaapiDisplay * display, guint width, guint height);
-
-GstVaapiWindow *
-gst_vaapi_window_new_from_native (const GstVaapiWindowClass *
-    window_class, GstVaapiDisplay * display, gpointer native_window);
+gst_vaapi_window_new_internal (const GstVaapiWindowClass * window_class,
+    GstVaapiDisplay * display, guintptr handle, guint width, guint height);
 
 /* Inline reference counting for core libgstvaapi library */
 #ifdef IN_LIBGSTVAAPI_CORE

gst-libs/gst/vaapi/gstvaapiwindow_wayland.c

@@ -545,7 +545,7 @@ gst_vaapi_window_wayland_new (GstVaapiDisplay * display,
 
   g_return_val_if_fail (GST_VAAPI_IS_DISPLAY_WAYLAND (display), NULL);
 
-  return
-      gst_vaapi_window_new (GST_VAAPI_WINDOW_CLASS
-      (gst_vaapi_window_wayland_class ()), display, width, height);
+  return gst_vaapi_window_new_internal (GST_VAAPI_WINDOW_CLASS
+      (gst_vaapi_window_wayland_class ()), display, GST_VAAPI_ID_INVALID, width,
+      height);
 }

gst-libs/gst/vaapi/gstvaapiwindow_x11.c

@@ -565,8 +565,9 @@ gst_vaapi_window_x11_new (GstVaapiDisplay * display, guint width, guint height)
   g_return_val_if_fail (GST_VAAPI_IS_DISPLAY_X11 (display), NULL);
 
   return
-      gst_vaapi_window_new (GST_VAAPI_WINDOW_CLASS (gst_vaapi_window_x11_class
-          ()), display, width, height);
+      gst_vaapi_window_new_internal (GST_VAAPI_WINDOW_CLASS
+      (gst_vaapi_window_x11_class ()), display, GST_VAAPI_ID_INVALID, width,
+      height);
 }
 
 /**
@@ -589,9 +590,8 @@ gst_vaapi_window_x11_new_with_xid (GstVaapiDisplay * display, Window xid)
   g_return_val_if_fail (GST_VAAPI_IS_DISPLAY_X11 (display), NULL);
   g_return_val_if_fail (xid != None, NULL);
 
-  return
-      gst_vaapi_window_new_from_native (GST_VAAPI_WINDOW_CLASS
-      (gst_vaapi_window_x11_class ()), display, GINT_TO_POINTER (xid));
+  return gst_vaapi_window_new_internal (GST_VAAPI_WINDOW_CLASS
+      (gst_vaapi_window_x11_class ()), display, xid, 0, 0);
 }
 
 /**