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