Actually forgot to add the overlay file itself

Original commit message from CVS:
Actually forgot to add the overlay file itself

sys/v4l/v4l-overlay_calls.c

@@ -0,0 +1,186 @@
+/* G-Streamer generic V4L element - generic V4L overlay handling
+ * Copyright (C) 2001-2002 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.
+ */
+
+//#define DEBUG
+
+#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 "v4l_calls.h"
+
+
+/******************************************************
+ * gst_v4l_set_overlay():
+ *   calls v4l-conf
+ * return value: TRUE on success, FALSE on error
+ ******************************************************/
+
+gboolean
+gst_v4l_set_overlay (GstV4lElement *v4lelement,
+                     gchar         *display)
+{
+  gchar *buff;
+
+#ifdef DEBUG
+  fprintf(stderr, "V4L: gst_v4l_set_overlay(), display = \'%s\'\n", display);
+#endif
+
+  GST_V4L_CHECK_NOT_OPEN(v4lelement);
+
+  /* start v4l-conf */
+  buff = g_strdup_printf("v4l-conf -q -c %s -d %s",
+    v4lelement->videodev?v4lelement->videodev:"/dev/video", display);
+
+  switch (system(buff))
+  {
+    case -1:
+      gst_element_error(GST_ELEMENT(v4lelement),
+        "Could not start v4l-conf: %s", sys_errlist[errno]);
+      g_free(buff);
+      return FALSE;
+    case 0:
+      break;
+    default:
+      gst_element_error(GST_ELEMENT(v4lelement),
+        "v4l-conf failed to run correctly: %s", sys_errlist[errno]);
+      g_free(buff);
+      return FALSE;
+  }
+
+  g_free(buff);
+  return TRUE;
+}
+
+
+/******************************************************
+ * gst_v4l_set_vwin():
+ *   does the VIDIOCSVWIN ioctl()
+ * return value: TRUE on success, FALSE on error
+ ******************************************************/
+
+static gboolean
+gst_v4l_set_vwin (GstV4lElement *v4lelement)
+{
+  if (ioctl(v4lelement->video_fd, VIDIOCSWIN, &(v4lelement->vwin)) < 0)
+  {
+    gst_element_error(GST_ELEMENT(v4lelement),
+      "Failed to set the video window: %s",
+      sys_errlist[errno]);
+    return FALSE;
+  }
+  return TRUE;
+}
+
+
+/******************************************************
+ * gst_v4l_set_window():
+ *   sets the window where to display the video overlay
+ * return value: TRUE on success, FALSE on error
+ ******************************************************/
+
+gboolean
+gst_v4l_set_window (GstV4lElement *v4lelement,
+                    gint x,        gint y,
+                    gint w,        gint h)
+{
+#ifdef DEBUG
+  fprintf(stderr, "V4L: gst_v4l_set_window(), position (x,y/wxh) = %d,%d/%dx%d\n",
+    x, y, w, h);
+#endif
+
+  GST_V4L_CHECK_OVERLAY(v4lelement);
+
+  v4lelement->vwin.clipcount = 0;
+  v4lelement->vwin.x = x;
+  v4lelement->vwin.y = y;
+  v4lelement->vwin.width = w;
+  v4lelement->vwin.height = h;
+  v4lelement->vwin.flags = 0;
+
+  return gst_v4l_set_vwin(v4lelement);
+}
+
+
+/******************************************************
+ * gst_v4l_set_clips():
+ *   sets video overlay clips
+ * return value: TRUE on success, FALSE on error
+ ******************************************************/
+
+gboolean
+gst_v4l_set_clips (GstV4lElement     *v4lelement,
+                   struct video_clip *clips,
+                   gint               num_clips)
+{
+#ifdef DEBUG
+  fprintf(stderr, "V4L: gst_v4l_set_clips()\n");
+#endif
+
+  GST_V4L_CHECK_OPEN(v4lelement);
+  GST_V4L_CHECK_OVERLAY(v4lelement);
+
+  if (!(v4lelement->vcap.type & VID_TYPE_CLIPPING))
+  {
+    gst_element_error(GST_ELEMENT(v4lelement),
+      "Device \'%s\' doesn't do clipping",
+      v4lelement->videodev?v4lelement->videodev:"/dev/video");
+    return FALSE;
+  }
+
+  v4lelement->vwin.clips = clips;
+  v4lelement->vwin.clipcount = num_clips;
+
+  return gst_v4l_set_vwin(v4lelement);
+}
+
+
+/******************************************************
+ * gst_v4l_set_overlay():
+ *   enables/disables actual video overlay display
+ * return value: TRUE on success, FALSE on error
+ ******************************************************/
+
+gboolean
+gst_v4l_enable_overlay (GstV4lElement *v4lelement,
+                        gboolean       enable)
+{
+  gint doit = enable?1:0;
+
+#ifdef DEBUG
+  fprintf(stderr, "V4L: gst_v4l_enable_overlay(), enable = %s\n",
+    enable?"true":"false");
+#endif
+
+  GST_V4L_CHECK_OPEN(v4lelement);
+  GST_V4L_CHECK_OVERLAY(v4lelement);
+
+  if (ioctl(v4lelement->video_fd, VIDIOCCAPTURE, &doit) < 0)
+  {
+    gst_element_error(GST_ELEMENT(v4lelement),
+      "Failed to %s overlay display: %s",
+      enable?"enable":"disable", sys_errlist[errno]);
+    return FALSE;
+  }
+
+  return TRUE;
+}