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/* GStreamer
* Copyright (C) <2010> Alexander Bokovoy <ab@samba.org>
*
* qtgv-xoverlay: demonstrate overlay handling using qt graphics view
*
* 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 "qtgv-xoverlay.h"
#include <QApplication>
#include <QTimer>
#include <gst/interfaces/xoverlay.h>
SinkPipeline::SinkPipeline(QGraphicsView *parent) : QObject(parent)
{
GstStateChangeReturn sret;
pipeline = gst_pipeline_new ("xvoverlay");
src = gst_element_factory_make ("videotestsrc", NULL);
if ((sink = gst_element_factory_make ("xvimagesink", NULL))) {
sret = gst_element_set_state (sink, GST_STATE_READY);
if (sret != GST_STATE_CHANGE_SUCCESS) {
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) {
gst_element_set_state (sink, GST_STATE_NULL);
gst_object_unref (sink);
if (strcmp (DEFAULT_VIDEOSINK, "xvimagesink") != 0 &&
strcmp (DEFAULT_VIDEOSINK, "ximagesink") != 0) {
if ((sink = gst_element_factory_make (DEFAULT_VIDEOSINK, NULL))) {
if (!GST_IS_BIN (sink)) {
sret = gst_element_set_state (sink, GST_STATE_READY);
if (sret != GST_STATE_CHANGE_SUCCESS) {
gst_element_set_state (sink, GST_STATE_NULL);
gst_object_unref (sink);
sink = NULL;
}
} else {
gst_object_unref (sink);
sink = NULL;
}
}
}
}
}
}
}
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);
xwinid = parent->winId();
}
SinkPipeline::~SinkPipeline()
{
gst_element_set_state (pipeline, GST_STATE_NULL);
gst_object_unref (pipeline);
}
void SinkPipeline::startPipeline()
{
GstStateChangeReturn sret;
/* we know what the video sink is in this case (xvimagesink), so we can
* just set it directly here now (instead of waiting for a prepare-xwindow-id
* element message in a sync bus handler and setting it there) */
gst_x_overlay_set_xwindow_id (GST_X_OVERLAY (sink), xwinid);
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 main( int argc, char **argv )
{
QApplication app(argc, argv);
QGraphicsScene scene;
scene.setSceneRect( -100.0, -100.0, 200.0, 200.0 );
QGraphicsView view( &scene );
view.resize(320, 240);
view.setWindowTitle("GstXOverlay Qt GraphicsView demo");
view.show();
gst_init (&argc, &argv);
SinkPipeline pipeline(&view);
pipeline.startPipeline();
int ret = app.exec();
view.hide();
return ret;
}
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