sys/: Remove client-side overlay handling, use the X-server v4l plugin for that. Nicer overlay, less code. Also make ...

Original commit message from CVS:
* sys/v4l/Makefile.am:
* sys/v4l/gstv4l.c: (plugin_init):
* sys/v4l/gstv4lelement.c: (gst_v4lelement_get_type),
(gst_v4lelement_init), (gst_v4lelement_dispose),
(gst_v4lelement_change_state):
* sys/v4l/gstv4lelement.h:
* sys/v4l/gstv4lxoverlay.c: (gst_v4l_xoverlay_open),
(gst_v4l_xoverlay_close), (idle_refresh),
(gst_v4l_xoverlay_set_xwindow_id):
* sys/v4l/gstv4lxoverlay.h:
* sys/v4l/v4l-overlay_calls.c:
* sys/v4l/v4l_calls.h:
* sys/v4l2/Makefile.am:
* sys/v4l2/gstv4l2.c: (plugin_init):
* sys/v4l2/gstv4l2element.c: (gst_v4l2element_get_type),
(gst_v4l2element_init), (gst_v4l2element_dispose),
(gst_v4l2element_change_state):
* sys/v4l2/gstv4l2element.h:
* sys/v4l2/gstv4l2xoverlay.c: (gst_v4l2_xoverlay_open),
(gst_v4l2_xoverlay_close), (idle_refresh),
(gst_v4l2_xoverlay_set_xwindow_id):
* sys/v4l2/gstv4l2xoverlay.h:
* sys/v4l2/v4l2-overlay_calls.c:
* sys/v4l2/v4l2_calls.h:
Remove client-side overlay handling, use the X-server v4l plugin
for that. Nicer overlay, less code. Also make the plugin
compileable without X (but then without overlay, obviously).
Makes xwindowlistener obsolete, should we remove that?

ChangeLog

@@ -1,3 +1,34 @@
+2004-10-25  Ronald S. Bultje  <rbultje@ronald.bitfreak.net>
+
+	* sys/v4l/Makefile.am:
+	* sys/v4l/gstv4l.c: (plugin_init):
+	* sys/v4l/gstv4lelement.c: (gst_v4lelement_get_type),
+	(gst_v4lelement_init), (gst_v4lelement_dispose),
+	(gst_v4lelement_change_state):
+	* sys/v4l/gstv4lelement.h:
+	* sys/v4l/gstv4lxoverlay.c: (gst_v4l_xoverlay_open),
+	(gst_v4l_xoverlay_close), (idle_refresh),
+	(gst_v4l_xoverlay_set_xwindow_id):
+	* sys/v4l/gstv4lxoverlay.h:
+	* sys/v4l/v4l-overlay_calls.c:
+	* sys/v4l/v4l_calls.h:
+	* sys/v4l2/Makefile.am:
+	* sys/v4l2/gstv4l2.c: (plugin_init):
+	* sys/v4l2/gstv4l2element.c: (gst_v4l2element_get_type),
+	(gst_v4l2element_init), (gst_v4l2element_dispose),
+	(gst_v4l2element_change_state):
+	* sys/v4l2/gstv4l2element.h:
+	* sys/v4l2/gstv4l2xoverlay.c: (gst_v4l2_xoverlay_open),
+	(gst_v4l2_xoverlay_close), (idle_refresh),
+	(gst_v4l2_xoverlay_set_xwindow_id):
+	* sys/v4l2/gstv4l2xoverlay.h:
+	* sys/v4l2/v4l2-overlay_calls.c:
+	* sys/v4l2/v4l2_calls.h:
+	  Remove client-side overlay handling, use the X-server v4l plugin
+	  for that. Nicer overlay, less code. Also make the plugin
+	  compileable without X (but then without overlay, obviously).
+	  Makes xwindowlistener obsolete, should we remove that?
+
 2004-10-25  Ronald S. Bultje  <rbultje@ronald.bitfreak.net>
 
 	* sys/oss/gstosssrc.c: (gst_osssrc_get_time), (gst_osssrc_get),

sys/v4l2/Makefile.am

@@ -1,18 +1,27 @@
 plugin_LTLIBRARIES = \
 	libgstvideo4linux2.la
 
+if USE_XVIDEO
+xv_source = gstv4l2xoverlay.c
+xv_libs = $(X_LIBS) $(XVIDEO_LIBS)
+else
+xv_source =
+xv_libs =
+endif
+
 libgstvideo4linux2_la_SOURCES = \
 	gstv4l2element.c v4l2_calls.c \
-	v4l2-overlay_calls.c \
 	gstv4l2src.c v4l2src_calls.c \
 	gstv4l2.c \
 	gstv4l2tuner.c \
-	gstv4l2xoverlay.c \
+	$(xv_source) \
 	gstv4l2colorbalance.c
 libgstvideo4linux2_la_CFLAGS = $(GST_CFLAGS) $(X_CFLAGS)
 libgstvideo4linux2_la_LIBADD = \
 	$(top_builddir)/gst-libs/gst/libgstinterfaces-@GST_MAJORMINOR@.la
-libgstvideo4linux2_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
+libgstvideo4linux2_la_LDFLAGS = \
+	$(GST_PLUGIN_LDFLAGS) \
+	$(xv_libs)
 
 noinst_HEADERS = gstv4l2element.h v4l2_calls.h \
 		gstv4l2src.h v4l2src_calls.h \

sys/v4l2/gstv4l2.c

@@ -31,11 +31,6 @@
 static gboolean
 plugin_init (GstPlugin * plugin)
 {
-  /* actually, we can survive without it, but I'll create
-   * that handling later on. */
-  if (!gst_library_load ("xwindowlistener"))
-    return FALSE;
-
   if (!gst_element_register (plugin, "v4l2element",
           GST_RANK_NONE, GST_TYPE_V4L2ELEMENT) ||
       !gst_element_register (plugin, "v4l2src",

sys/v4l2/gstv4l2element.c

@@ -28,7 +28,9 @@
 
 #include "v4l2_calls.h"
 #include "gstv4l2tuner.h"
+#ifdef HAVE_XVIDEO
 #include "gstv4l2xoverlay.h"
+#endif
 #include "gstv4l2colorbalance.h"
 
 #include <gst/propertyprobe/propertyprobe.h>
@@ -284,11 +286,13 @@ gst_v4l2element_get_type (void)
       NULL,
       NULL,
     };
+#ifdef HAVE_XVIDEO
     static const GInterfaceInfo v4l2_xoverlay_info = {
       (GInterfaceInitFunc) gst_v4l2_xoverlay_interface_init,
       NULL,
       NULL,
     };
+#endif
     static const GInterfaceInfo v4l2_colorbalance_info = {
       (GInterfaceInitFunc) gst_v4l2_color_balance_interface_init,
       NULL,
@@ -308,8 +312,10 @@ gst_v4l2element_get_type (void)
         GST_TYPE_IMPLEMENTS_INTERFACE, &v4l2iface_info);
     g_type_add_interface_static (v4l2element_type,
         GST_TYPE_TUNER, &v4l2_tuner_info);
+#ifdef HAVE_XVIDEO
     g_type_add_interface_static (v4l2element_type,
         GST_TYPE_X_OVERLAY, &v4l2_xoverlay_info);
+#endif
     g_type_add_interface_static (v4l2element_type,
         GST_TYPE_COLOR_BALANCE, &v4l2_colorbalance_info);
     g_type_add_interface_static (v4l2element_type,
@@ -412,13 +418,10 @@ gst_v4l2element_init (GstV4l2Element * v4l2element)
   v4l2element->video_fd = -1;
   v4l2element->buffer = NULL;
   v4l2element->device = g_strdup ("/dev/video0");
-  v4l2element->display = g_strdup (g_getenv ("DISPLAY"));
 
   v4l2element->channels = NULL;
   v4l2element->norms = NULL;
   v4l2element->colors = NULL;
-
-  v4l2element->overlay = gst_v4l2_xoverlay_new (v4l2element);
 }
 
 
@@ -427,14 +430,6 @@ gst_v4l2element_dispose (GObject * object)
 {
   GstV4l2Element *v4l2element = GST_V4L2ELEMENT (object);
 
-  if (v4l2element->overlay) {
-    gst_v4l2_xoverlay_free (v4l2element);
-  }
-
-  if (v4l2element->display) {
-    g_free (v4l2element->display);
-  }
-
   g_free (v4l2element->device);
   v4l2element->device = NULL;
   g_free (v4l2element->norm);
@@ -576,19 +571,21 @@ gst_v4l2element_change_state (GstElement * element)
    */
   switch (GST_STATE_TRANSITION (element)) {
     case GST_STATE_NULL_TO_READY:
-      gst_v4l2_set_display (v4l2element);
-
       if (!gst_v4l2_open (v4l2element))
         return GST_STATE_FAILURE;
 
+#ifdef HAVE_XVIDEO
       gst_v4l2_xoverlay_open (v4l2element);
+#endif
 
       /* emit a signal! whoopie! */
       g_signal_emit (G_OBJECT (v4l2element),
           gst_v4l2element_signals[SIGNAL_OPEN], 0, v4l2element->device);
       break;
     case GST_STATE_READY_TO_NULL:
+#ifdef HAVE_XVIDEO
       gst_v4l2_xoverlay_close (v4l2element);
+#endif
 
       if (!gst_v4l2_close (v4l2element))
         return GST_STATE_FAILURE;

sys/v4l2/gstv4l2element.h

@@ -88,6 +88,7 @@ struct v4l2_buffer
 
 typedef	struct _GstV4l2Element		GstV4l2Element;
 typedef	struct _GstV4l2ElementClass	GstV4l2ElementClass;
+typedef struct _GstV4l2Xv		GstV4l2Xv;
 
 struct _GstV4l2Element {
 	GstElement element;
@@ -110,16 +111,13 @@ struct _GstV4l2Element {
 	GList *colors;
 
 	/* X-overlay */
-	GstXWindowListener *overlay;
+	GstV4l2Xv *xv;
 	XID xwindow_id;
 
 	/* properties */
 	gchar *norm;
 	gchar *channel;
 	gulong frequency;
-
-	/* caching values */
-	gchar *display;
 };
 
 struct _GstV4l2ElementClass {

sys/v4l2/gstv4l2xoverlay.c

@@ -23,14 +23,26 @@
 #include "config.h"
 #endif
 
+#include <string.h>
 #include <gst/gst.h>
 #include <gst/xoverlay/xoverlay.h>
-#include <gst/xwindowlistener/xwindowlistener.h>
+#include <X11/X.h>
+#include <X11/Xlib.h>
+#include <X11/extensions/Xv.h>
+#include <X11/extensions/Xvlib.h>
+#include <sys/stat.h>
 
 #include "gstv4l2xoverlay.h"
 #include "gstv4l2element.h"
 #include "v4l2_calls.h"
 
+struct _GstV4l2Xv
+{
+  Display *dpy;
+  gint port, idle_id;
+  GMutex *mutex;
+};
+
 static void gst_v4l2_xoverlay_set_xwindow_id (GstXOverlay * overlay,
     XID xwindow_id);
 
@@ -41,80 +53,152 @@ gst_v4l2_xoverlay_interface_init (GstXOverlayClass * klass)
   klass->set_xwindow_id = gst_v4l2_xoverlay_set_xwindow_id;
 }
 
-GstXWindowListener *
-gst_v4l2_xoverlay_new (GstV4l2Element * v4l2element)
-{
-  GstXWindowListener *xwin = gst_x_window_listener_new (NULL,
-      (MapWindowFunc) gst_v4l2_enable_overlay,
-      (SetWindowFunc) gst_v4l2_set_window,
-      (gpointer) v4l2element);
-
-  v4l2element->overlay = xwin;
-  v4l2element->xwindow_id = 0;
-
-  return xwin;
-}
-
-void
-gst_v4l2_xoverlay_free (GstV4l2Element * v4l2element)
-{
-  gst_v4l2_xoverlay_close (v4l2element);
-  g_object_unref (G_OBJECT (v4l2element->overlay));
-  v4l2element->overlay = NULL;
-}
-
 void
 gst_v4l2_xoverlay_open (GstV4l2Element * v4l2element)
 {
-  GstXWindowListener *xwin = v4l2element->overlay;
+  struct stat s;
+  GstV4l2Xv *v4l2xv;
+  const gchar *name = g_getenv ("DISPLAY");
+  int ver, rel, req, ev, err, anum, i, id = 0, first_id = 0, min;
+  XvAdaptorInfo *ai;
+  Display *dpy;
 
-  if (xwin) {
+  /* we need a display, obviously */
-    xwin->display_name = g_strdup (v4l2element->display);
+  if (!name || !(dpy = XOpenDisplay (name))) {
+    GST_WARNING ("No $DISPLAY set or failed to open - no overlay");
+    return;
+  }
 
-    if (v4l2element->xwindow_id != 0 &&
+  /* find port that belongs to this device */
-        xwin->display_name && xwin->display_name[0] == ':') {
+  if (XvQueryExtension (dpy, &ver, &rel, &req, &ev, &err) != Success) {
-      gst_x_window_listener_set_xid (xwin, v4l2element->xwindow_id);
+    GST_WARNING ("Xv extension not supported - no overlay");
+    XCloseDisplay (dpy);
+    return;
+  }
+  if (XvQueryAdaptors (dpy, DefaultRootWindow (dpy), &anum, &ai) != Success) {
+    GST_WARNING ("Failed to query Xv adaptors");
+    XCloseDisplay (dpy);
+    return;
+  }
+  if (fstat (v4l2element->video_fd, &s) < 0) {
+    GST_ERROR ("Failed to stat() file descriptor: %s", g_strerror (errno));
+    XCloseDisplay (dpy);
+    return;
+  }
+  min = s.st_rdev & 0xff;
+  for (i = 0; i < anum; i++) {
+    if (!strcmp (ai[i].name, "video4linux")) {
+      if (first_id == 0)
+        first_id = ai[i].base_id;
+
+      /* hmm... */
+      if (first_id != 0 && ai[i].base_id == first_id + min)
+        id = ai[i].base_id;
     }
   }
+  XvFreeAdaptorInfo (ai);
+
+  if (id == 0) {
+    GST_WARNING ("Did not find XvPortID for device - no overlay");
+    XCloseDisplay (dpy);
+    return;
+  }
+
+  v4l2xv = g_new0 (GstV4l2Xv, 1);
+  v4l2xv->dpy = dpy;
+  v4l2xv->port = id;
+  v4l2xv->mutex = g_mutex_new ();
+  v4l2xv->idle_id = 0;
+  v4l2element->xv = v4l2xv;
+
+  if (v4l2element->xwindow_id) {
+    gst_v4l2_xoverlay_set_xwindow_id (GST_X_OVERLAY (v4l2element),
+        v4l2element->xwindow_id);
+  }
 }
 
 void
 gst_v4l2_xoverlay_close (GstV4l2Element * v4l2element)
 {
-  GstXWindowListener *xwin = v4l2element->overlay;
+  GstV4l2Xv *v4l2xv = v4l2element->xv;
 
-  if (xwin != NULL) {
+  if (!v4l2element->xv)
-    if (v4l2element->xwindow_id != 0 &&
+    return;
-        xwin->display_name && xwin->display_name[0] == ':') {
-      gst_x_window_listener_set_xid (xwin, 0);
-    }
 
-    g_free (xwin->display_name);
+  if (v4l2element->xwindow_id) {
-    xwin->display_name = NULL;
+    gst_v4l2_xoverlay_set_xwindow_id (GST_X_OVERLAY (v4l2element), 0);
   }
+
+  XCloseDisplay (v4l2xv->dpy);
+  g_mutex_free (v4l2xv->mutex);
+  if (v4l2xv->idle_id)
+    g_source_remove (v4l2xv->idle_id);
+  g_free (v4l2xv);
+  v4l2element->xv = NULL;
+}
+
+static gboolean
+idle_refresh (gpointer data)
+{
+  GstV4l2Element *v4l2element = GST_V4L2ELEMENT (data);
+  GstV4l2Xv *v4l2xv = v4l2element->xv;
+  XWindowAttributes attr;
+
+  if (v4l2xv) {
+    g_mutex_lock (v4l2xv->mutex);
+
+    XGetWindowAttributes (v4l2xv->dpy, v4l2element->xwindow_id, &attr);
+    XvPutVideo (v4l2xv->dpy, v4l2xv->port, v4l2element->xwindow_id,
+        DefaultGC (v4l2xv->dpy, DefaultScreen (v4l2xv->dpy)),
+        0, 0, attr.width, attr.height, 0, 0, attr.width, attr.height);
+
+    v4l2xv->idle_id = 0;
+    g_mutex_unlock (v4l2xv->mutex);
+  }
+
+  /* once */
+  return FALSE;
 }
 
 static void
 gst_v4l2_xoverlay_set_xwindow_id (GstXOverlay * overlay, XID xwindow_id)
 {
   GstV4l2Element *v4l2element = GST_V4L2ELEMENT (overlay);
-  GstXWindowListener *xwin = v4l2element->overlay;
+  GstV4l2Xv *v4l2xv = v4l2element->xv;
+  XWindowAttributes attr;
+  gboolean change = (v4l2element->xwindow_id != xwindow_id);
 
-  if (v4l2element->xwindow_id == xwindow_id) {
+  if (v4l2xv)
+    g_mutex_lock (v4l2xv->mutex);
+
+  if (change) {
+    if (v4l2element->xwindow_id) {
+      XvSelectPortNotify (v4l2xv->dpy, v4l2xv->port, 0);
+      XvSelectVideoNotify (v4l2xv->dpy, v4l2element->xwindow_id, 0);
+    }
+
+    v4l2element->xwindow_id = xwindow_id;
+  }
+
+  if (!v4l2xv || xwindow_id == 0) {
+    if (v4l2xv)
+      g_mutex_unlock (v4l2xv->mutex);
     return;
   }
 
-  if (gst_element_get_state (GST_ELEMENT (v4l2element)) != GST_STATE_NULL &&
+  if (change) {
-      v4l2element->xwindow_id != 0 &&
+    /* draw */
-      xwin != NULL && xwin->display_name && xwin->display_name[0] == ':') {
+    XvSelectPortNotify (v4l2xv->dpy, v4l2xv->port, 1);
-    gst_x_window_listener_set_xid (xwin, 0);
+    XvSelectVideoNotify (v4l2xv->dpy, v4l2element->xwindow_id, 1);
   }
 
-  v4l2element->xwindow_id = xwindow_id;
+  XGetWindowAttributes (v4l2xv->dpy, v4l2element->xwindow_id, &attr);
+  XvPutVideo (v4l2xv->dpy, v4l2xv->port, v4l2element->xwindow_id,
+      DefaultGC (v4l2xv->dpy, DefaultScreen (v4l2xv->dpy)),
+      0, 0, attr.width, attr.height, 0, 0, attr.width, attr.height);
 
-  if (gst_element_get_state (GST_ELEMENT (v4l2element)) != GST_STATE_NULL &&
+  if (v4l2xv->idle_id)
-      v4l2element->xwindow_id != 0 &&
+    g_source_remove (v4l2xv->idle_id);
-      xwin != NULL && xwin->display_name && xwin->display_name[0] == ':') {
+  v4l2xv->idle_id = g_idle_add (idle_refresh, v4l2element);
-    gst_x_window_listener_set_xid (xwin, v4l2element->xwindow_id);
+  g_mutex_unlock (v4l2xv->mutex);
-  }
 }

sys/v4l2/gstv4l2xoverlay.h

@@ -31,11 +31,6 @@ G_BEGIN_DECLS
 
 void	gst_v4l2_xoverlay_interface_init (GstXOverlayClass *klass);
 
-GstXWindowListener *
-	gst_v4l2_xoverlay_new		(GstV4l2Element  *v4l2element);
-void	gst_v4l2_xoverlay_free		(GstV4l2Element  *v4l2element);
-
-/* signal handlers */
 void	gst_v4l2_xoverlay_open		(GstV4l2Element  *v4l2element);
 void	gst_v4l2_xoverlay_close		(GstV4l2Element  *v4l2element);
 

sys/v4l2/v4l2-overlay_calls.c

@@ -1,140 +0,0 @@
-/* G-Streamer generic V4L2 element - generic V4L2 overlay handling
- * Copyright (C) 2002 Ronald Bultje <rbultje@ronald.bitfreak.net>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <sys/ioctl.h>
-#include <sys/mman.h>
-#include <string.h>
-#include <errno.h>
-#include "v4l2_calls.h"
-
-#define DEBUG(format, args...) \
-	GST_DEBUG_OBJECT (\
-		GST_ELEMENT(v4l2element), \
-		"V4L2-overlay: " format, ##args)
-
-
-/******************************************************
- * gst_v4l2_set_display():
- *   calls v4l-conf
- * return value: TRUE on success, FALSE on error
- ******************************************************/
-
-gboolean
-gst_v4l2_set_display (GstV4l2Element * v4l2element)
-{
-  gchar *buff;
-
-  if (v4l2element->display)
-    g_free (v4l2element->display);
-  v4l2element->display = g_strdup (g_getenv ("DISPLAY"));
-
-  DEBUG ("trying to set overlay to '%s'", v4l2element->display);
-
-  /* start v4l-conf */
-  buff = g_strdup_printf ("v4l-conf -q -c %s -d %s",
-      v4l2element->device, v4l2element->display);
-
-  switch (system (buff)) {
-    case -1:
-      GST_ELEMENT_ERROR (v4l2element, RESOURCE, FAILED,
-          (_("Could not start v4l-conf.")), GST_ERROR_SYSTEM);
-      g_free (buff);
-      return FALSE;
-    case 0:
-      break;
-    default:
-      GST_ELEMENT_ERROR (v4l2element, RESOURCE, FAILED,
-          (_("Executing v4l-conf failed.")), GST_ERROR_SYSTEM);
-      g_free (buff);
-      return FALSE;
-  }
-
-  g_free (buff);
-  return TRUE;
-}
-
-
-/******************************************************
- * gst_v4l2_set_window():
- *   sets the window where to display the video overlay
- * return value: TRUE on success, FALSE on error
- ******************************************************/
-
-gboolean
-gst_v4l2_set_window (GstElement * element,
-    gint x, gint y, gint w, gint h, struct v4l2_clip * clips, gint num_clips)
-{
-  struct v4l2_format fmt;
-  GstV4l2Element *v4l2element = GST_V4L2ELEMENT (element);
-
-  DEBUG ("trying to set video window to %dx%d,%d,%d", x, y, w, h);
-  GST_V4L2_CHECK_OVERLAY (v4l2element);
-  GST_V4L2_CHECK_OPEN (v4l2element);
-
-  fmt.type = V4L2_CAP_VIDEO_OVERLAY;
-  fmt.fmt.win.clipcount = 0;
-  fmt.fmt.win.w.left = x;
-  fmt.fmt.win.w.top = y;
-  fmt.fmt.win.w.width = w;
-  fmt.fmt.win.w.height = h;
-  fmt.fmt.win.clips = clips;
-  fmt.fmt.win.clipcount = num_clips;
-  fmt.fmt.win.bitmap = NULL;
-
-  if (ioctl (v4l2element->video_fd, VIDIOC_S_FMT, &fmt) < 0) {
-    GST_ELEMENT_ERROR (v4l2element, RESOURCE, TOO_LAZY, (NULL),
-        ("Failed to set the video window: %s", g_strerror (errno)));
-    return FALSE;
-  }
-
-  return TRUE;
-}
-
-
-/******************************************************
- * gst_v4l_set_overlay():
- *   enables/disables actual video overlay display
- * return value: TRUE on success, FALSE on error
- ******************************************************/
-
-gboolean
-gst_v4l2_enable_overlay (GstV4l2Element * v4l2element, gboolean enable)
-{
-  gint doit = enable ? 1 : 0;
-
-  DEBUG ("trying to %s overlay display", enable ? "enable" : "disable");
-  GST_V4L2_CHECK_OPEN (v4l2element);
-  GST_V4L2_CHECK_OVERLAY (v4l2element);
-
-  if (ioctl (v4l2element->video_fd, VIDIOC_OVERLAY, &doit) < 0) {
-    GST_ELEMENT_ERROR (v4l2element, RESOURCE, TOO_LAZY, (NULL),
-        ("Failed to %s overlay display: %s",
-            enable ? "enable" : "disable", g_strerror (errno)));
-    return FALSE;
-  }
-
-  return TRUE;
-}

sys/v4l2/v4l2_calls.h

@@ -118,14 +118,4 @@ gboolean	gst_v4l2_set_attribute		(GstV4l2Element *v4l2element,
 						 int             attribute,
 						 const int       value);
 
-/* overlay */
-gboolean	gst_v4l2_set_display		(GstV4l2Element *v4l2element);
-gboolean	gst_v4l2_set_window		(GstElement     *element,
-						 gint x,         gint y,
-						 gint w,         gint h,
-						 struct v4l2_clip *clips,
-						 gint            num_clips);
-gboolean	gst_v4l2_enable_overlay		(GstV4l2Element *v4l2element,
-						 gboolean        enable);
-
 #endif /* __V4L2_CALLS_H__ */