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153 lines
5.3 KiB
C++
153 lines
5.3 KiB
C++
// SPDX-License-Identifier: BSD-2-Clause
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//
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// Copyright (C) 2020, Matthew Waters <matthew@centricular.com>
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// a) Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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//
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// b) Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in
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// the documentation and/or other materials provided with the distribution.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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// THE POSSIBILITY OF SUCH DAMAGE.
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#include <QApplication>
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#include <QQmlApplicationEngine>
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#include <QQuickWindow>
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#include <QQuickItem>
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#include <QRunnable>
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#include <QTimer>
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#include <gst/gst.h>
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#include <gst/gl/gl.h>
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static GstBusSyncReply
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on_sync_bus_message (GstBus * bus, GstMessage * msg, gpointer data)
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{
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GstElement *pipeline = (GstElement *) data;
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switch (GST_MESSAGE_TYPE (msg)) {
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case GST_MESSAGE_HAVE_CONTEXT: {
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GstContext *context;
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gst_message_parse_have_context (msg, &context);
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/* if you need specific behviour or a context from a specific element,
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* you need to be selective about which context's you set on the
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* pipeline */
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if (gst_context_has_context_type (context, GST_GL_DISPLAY_CONTEXT_TYPE)) {
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gst_println ("got have-context %p", context);
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gst_element_set_context (pipeline, context);
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}
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if (context)
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gst_context_unref (context);
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gst_message_unref (msg);
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return GST_BUS_DROP;
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}
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default:
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break;
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}
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return GST_BUS_PASS;
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}
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static void
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connect_tee (GstElement * tee, GstElement * queue)
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{
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gst_println ("attaching tee/queue %p %p", tee, queue);
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gst_element_link (tee, queue);
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}
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static void
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connect_qmlglsink (GstElement * pipeline, GstElement * tee, QQuickWindow * rootObject)
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{
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GstElement *queue = gst_element_factory_make ("queue", NULL);
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GstElement *qmlglsink = gst_element_factory_make ("qmlglsink", NULL);
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QQuickItem *videoItem;
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gst_println ("attaching qmlglsink %s at %p", GST_OBJECT_NAME (qmlglsink), qmlglsink);
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gst_bin_add (GST_BIN (pipeline), queue);
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gst_bin_add (GST_BIN (pipeline), qmlglsink);
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gst_element_link (queue, qmlglsink);
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gst_element_set_state (queue, GST_STATE_PLAYING);
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videoItem = rootObject->findChild<QQuickItem *> ("videoItem");
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g_assert (videoItem);
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g_object_set (qmlglsink, "widget", videoItem, NULL);
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gst_element_set_state (qmlglsink, GST_STATE_PAUSED);
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connect_tee (tee, queue);
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gst_element_set_state (qmlglsink, GST_STATE_PLAYING);
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}
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int main(int argc, char *argv[])
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{
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int ret;
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gst_init (&argc, &argv);
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{
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QGuiApplication app(argc, argv);
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/* test a whole bunch of elements respect the change in display
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* and therefore OpenGL context */
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GstElement *pipeline = gst_parse_launch ("gltestsrc ! "
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"capsfilter caps=video/x-raw(ANY),framerate=10/1 ! glupload ! "
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"glcolorconvert ! glalpha noise-level=16 method=green angle=40 ! "
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"glcolorbalance hue=0.25 ! gltransformation rotation-x=30 ! "
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"glvideomixerelement ! glviewconvert output-mode-override=side-by-side ! "
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"glstereosplit name=s "
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"glstereomix name=m ! tee name=t ! queue ! fakesink sync=true "
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"s.left ! queue ! m.sink_0 "
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"s.right ! queue ! m.sink_1", NULL);
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GstBus *bus = gst_element_get_bus (pipeline);
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gst_bus_set_sync_handler (bus, on_sync_bus_message, pipeline, NULL);
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gst_object_unref (bus);
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/* the plugin must be loaded before loading the qml file to register the
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* GstGLVideoItem qml item */
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GstElement *sink = gst_element_factory_make ("qmlglsink", NULL);
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g_assert (pipeline && sink);
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gst_object_unref (sink);
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QQuickWindow *rootObject;
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/* The Qml scene starts out with the widget not connected to any qmlglsink
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* element */
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QQmlApplicationEngine engine;
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engine.load(QUrl(QStringLiteral("qrc:/main.qml")));
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/* find and set the videoItem on the sink */
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rootObject = static_cast<QQuickWindow *> (engine.rootObjects().first());
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gst_element_set_state (pipeline, GST_STATE_PLAYING);
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GstElement *t = gst_bin_get_by_name (GST_BIN (pipeline), "t");
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gst_object_unref (t); /* ref held by pipeline */
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/* add the qmlglsink element */
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QTimer::singleShot(5000, [pipeline, t, rootObject]() { connect_qmlglsink (pipeline, t, rootObject); } );
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ret = app.exec();
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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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gst_deinit ();
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return ret;
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}
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