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/* GStreamer
* Copyright (C) <2010> Stefan Kost <ensonic@users.sf.net>
*
* qt-xoverlay: demonstrate overlay handling using qt
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <glib.h>
#include <gst/gst.h>
#include <gst/video/videooverlay.h>
#include <QApplication>
#include <QTimer>
#include <QWidget>
/* slightly convoluted way to find a working video sink that's not a bin,
* one could use autovideosink from gst-plugins-good instead
*/
static GstElement *
find_video_sink (void)
{
GstStateChangeReturn sret;
GstElement *sink;
if ((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);
if ((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;
if ((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[])
{
gst_init (&argc, &argv);
QApplication app(argc, argv);
app.connect(&app, SIGNAL(lastWindowClosed()), &app, SLOT(quit ()));
/* prepare the pipeline */
GstElement *pipeline = gst_pipeline_new ("xvoverlay");
GstElement *src = gst_element_factory_make ("videotestsrc", NULL);
GstElement *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);
/* prepare the ui */
QWidget window;
window.resize(320, 240);
window.setWindowTitle("GstXOverlay Qt demo");
window.show();
WId xwinid = window.winId();
gst_video_overlay_set_window_handle (GST_VIDEO_OVERLAY (sink), xwinid);
/* run the pipeline */
GstStateChangeReturn sret = gst_element_set_state (pipeline,
GST_STATE_PLAYING);
if (sret == GST_STATE_CHANGE_FAILURE) {
gst_element_set_state (pipeline, GST_STATE_NULL);
gst_object_unref (pipeline);
/* Exit application */
QTimer::singleShot(0, QApplication::activeWindow(), SLOT(quit()));
}
int ret = app.exec();
window.hide();
gst_element_set_state (pipeline, GST_STATE_NULL);
gst_object_unref (pipeline);
return ret;
}
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