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examples: don't hard-code xvimagesink for Gtk+ GstXOverlay example

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Try to find a working videosink, don't hardcode xvimagesink. Also
add some borders to window and give it a title so that it's clear
that this is really a Gtk+ window and not a window created by the
videosink.
This commit is contained in:
Tim-Philipp Müller 2010-02-18 23:47:35 +00:00
parent 8cf4f48892
commit 590bc917a2
1 changed files with 51 additions and 1 deletions
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52
tests/examples/overlay/gtk-xoverlay.c
View file

@ -30,6 +30,8 @@
#include <gst/gst.h>
#include <gst/interfaces/xoverlay.h>
#include <string.h>
static void
window_closed (GtkWidget * widget, GdkEvent * event, gpointer user_data)
{
@ -40,6 +42,48 @@ window_closed (GtkWidget * widget, GdkEvent * event, gpointer user_data)
gtk_main_quit ();
}
/* slightly convoluted way to find a working video sink that's not a bin */
static GstElement *
find_video_sink (void)
{
GstStateChangeReturn sret;
GstElement *sink;
sink = gst_element_factory_make ("xvimagesink", NULL);
sret = gst_element_set_state (sink, GST_STATE_READY);
if (sret == GST_STATE_CHANGE_SUCCESS)
return sink;
gst_element_set_state (sink, GST_STATE_NULL);
gst_object_unref (sink);
sink = gst_element_factory_make ("ximagesink", NULL);
sret = gst_element_set_state (sink, GST_STATE_READY);
if (sret == GST_STATE_CHANGE_SUCCESS)
return sink;
gst_element_set_state (sink, GST_STATE_NULL);
gst_object_unref (sink);
if (strcmp (DEFAULT_VIDEOSINK, "xvimagesink") == 0 ||
strcmp (DEFAULT_VIDEOSINK, "ximagesink") == 0)
return NULL;
sink = gst_element_factory_make (DEFAULT_VIDEOSINK, NULL);
if (GST_IS_BIN (sink)) {
gst_object_unref (sink);
return NULL;
}
sret = gst_element_set_state (sink, GST_STATE_READY);
if (sret == GST_STATE_CHANGE_SUCCESS)
return sink;
gst_element_set_state (sink, GST_STATE_NULL);
gst_object_unref (sink);
return NULL;
}
int
main (int argc, char **argv)
{
@ -58,7 +102,11 @@ main (int argc, char **argv)
pipeline = gst_pipeline_new ("xvoverlay");
src = gst_element_factory_make ("videotestsrc", NULL);
sink = gst_element_factory_make ("xvimagesink", NULL);
sink = find_video_sink ();
if (sink == NULL)
g_error ("Couldn't find a working video sink.");
gst_bin_add_many (GST_BIN (pipeline), src, sink, NULL);
gst_element_link (src, sink);
@ -68,10 +116,12 @@ main (int argc, char **argv)
g_signal_connect (G_OBJECT (window), "delete-event",
G_CALLBACK (window_closed), (gpointer) pipeline);
gtk_window_set_default_size (GTK_WINDOW (window), 320, 240);
gtk_window_set_title (GTK_WINDOW (window), "GstXOverlay Gtk+ demo");
video_window = gtk_drawing_area_new ();
gtk_widget_set_double_buffered (video_window, FALSE);
gtk_container_add (GTK_CONTAINER (window), video_window);
gtk_container_set_border_width (GTK_CONTAINER (window), 16);
gtk_widget_show_all (window);
gtk_widget_realize (window);