mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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127 lines
3.5 KiB
C++
127 lines
3.5 KiB
C++
/* GStreamer
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* Copyright (C) <2010> Stefan Kost <ensonic@users.sf.net>
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*
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* qt-xoverlay: demonstrate overlay handling using qt
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <glib.h>
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#include <gst/gst.h>
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#include <gst/video/videooverlay.h>
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#include <QApplication>
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#include <QTimer>
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#include <QWidget>
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/* slightly convoluted way to find a working video sink that's not a bin,
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* one could use autovideosink from gst-plugins-good instead
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*/
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static GstElement *
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find_video_sink (void)
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{
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GstStateChangeReturn sret;
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GstElement *sink;
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if ((sink = gst_element_factory_make ("xvimagesink", NULL))) {
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sret = gst_element_set_state (sink, GST_STATE_READY);
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if (sret == GST_STATE_CHANGE_SUCCESS)
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return sink;
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gst_element_set_state (sink, GST_STATE_NULL);
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}
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gst_object_unref (sink);
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if ((sink = gst_element_factory_make ("ximagesink", NULL))) {
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sret = gst_element_set_state (sink, GST_STATE_READY);
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if (sret == GST_STATE_CHANGE_SUCCESS)
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return sink;
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gst_element_set_state (sink, GST_STATE_NULL);
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}
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gst_object_unref (sink);
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if (strcmp (DEFAULT_VIDEOSINK, "xvimagesink") == 0 ||
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strcmp (DEFAULT_VIDEOSINK, "ximagesink") == 0)
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return NULL;
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if ((sink = gst_element_factory_make (DEFAULT_VIDEOSINK, NULL))) {
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if (GST_IS_BIN (sink)) {
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gst_object_unref (sink);
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return NULL;
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}
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sret = gst_element_set_state (sink, GST_STATE_READY);
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if (sret == GST_STATE_CHANGE_SUCCESS)
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return sink;
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gst_element_set_state (sink, GST_STATE_NULL);
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}
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gst_object_unref (sink);
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return NULL;
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}
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int main(int argc, char *argv[])
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{
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gst_init (&argc, &argv);
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QApplication app(argc, argv);
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app.connect(&app, SIGNAL(lastWindowClosed()), &app, SLOT(quit ()));
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/* prepare the pipeline */
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GstElement *pipeline = gst_pipeline_new ("xvoverlay");
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GstElement *src = gst_element_factory_make ("videotestsrc", NULL);
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GstElement *sink = find_video_sink ();
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if (sink == NULL)
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g_error ("Couldn't find a working video sink.");
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gst_bin_add_many (GST_BIN (pipeline), src, sink, NULL);
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gst_element_link (src, sink);
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/* prepare the ui */
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QWidget window;
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window.resize(320, 240);
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window.setWindowTitle("GstVideoOverlay Qt demo");
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window.show();
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WId xwinid = window.winId();
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gst_video_overlay_set_window_handle (GST_VIDEO_OVERLAY (sink), xwinid);
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/* run the pipeline */
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GstStateChangeReturn sret = gst_element_set_state (pipeline,
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GST_STATE_PLAYING);
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if (sret == GST_STATE_CHANGE_FAILURE) {
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gst_element_set_state (pipeline, GST_STATE_NULL);
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gst_object_unref (pipeline);
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/* Exit application */
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QTimer::singleShot(0, QApplication::activeWindow(), SLOT(quit()));
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}
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int ret = app.exec();
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window.hide();
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gst_element_set_state (pipeline, GST_STATE_NULL);
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gst_object_unref (pipeline);
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return ret;
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}
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