mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-05 17:09:48 +00:00
128 lines
3.5 KiB
C++
128 lines
3.5 KiB
C++
/* 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.setQuitOnLastWindowClosed(true);
|
|
|
|
/* 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("GstVideoOverlay 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;
|
|
}
|