Commit 73cd4477 authored by Matthew Waters's avatar Matthew Waters 🐨 Committed by GStreamer Merge Bot

test/qml: add an dynamically adding qmlglsink element

The example shows how to add qmlglsink to an already running pipeline
with pre-existing OpenGL elements.
parent a1f53b4f
subdir('qmlsink')
subdir('qmlsink-dynamically-added')
subdir('qmlsrc')
deployment.pri
play
qrc_qmlsink.cpp
*.o
#include <QApplication>
#include <QQmlApplicationEngine>
#include <QQuickWindow>
#include <QQuickItem>
#include <QRunnable>
#include <QTimer>
#include <gst/gst.h>
#include <gst/gl/gl.h>
static GstBusSyncReply
on_sync_bus_message (GstBus * bus, GstMessage * msg, gpointer data)
{
GstElement *pipeline = (GstElement *) data;
switch (GST_MESSAGE_TYPE (msg)) {
case GST_MESSAGE_HAVE_CONTEXT: {
GstContext *context;
gst_message_parse_have_context (msg, &context);
/* if you need specific behviour or a context from a specific element,
* you need to be selective about which context's you set on the
* pipeline */
if (gst_context_has_context_type (context, GST_GL_DISPLAY_CONTEXT_TYPE)) {
gst_println ("got have-context %p", context);
gst_element_set_context (pipeline, context);
}
if (context)
gst_context_unref (context);
gst_message_unref (msg);
return GST_BUS_DROP;
}
default:
break;
}
return GST_BUS_PASS;
}
static void
connect_tee (GstElement * tee, GstElement * queue)
{
gst_println ("attaching tee/queue %p %p", tee, queue);
gst_element_link (tee, queue);
}
static void
connect_qmlglsink (GstElement * pipeline, GstElement * tee, QQuickWindow * rootObject)
{
GstElement *queue = gst_element_factory_make ("queue", NULL);
GstElement *qmlglsink = gst_element_factory_make ("qmlglsink", NULL);
QQuickItem *videoItem;
gst_println ("attaching qmlglsink %s at %p", GST_OBJECT_NAME (qmlglsink), qmlglsink);
gst_bin_add (GST_BIN (pipeline), queue);
gst_bin_add (GST_BIN (pipeline), qmlglsink);
gst_element_link (queue, qmlglsink);
gst_element_set_state (queue, GST_STATE_PLAYING);
videoItem = rootObject->findChild<QQuickItem *> ("videoItem");
g_assert (videoItem);
g_object_set (qmlglsink, "widget", videoItem, NULL);
gst_element_set_state (qmlglsink, GST_STATE_PAUSED);
connect_tee (tee, queue);
gst_element_set_state (qmlglsink, GST_STATE_PLAYING);
}
int main(int argc, char *argv[])
{
int ret;
gst_init (&argc, &argv);
{
QGuiApplication app(argc, argv);
/* test a whole bunch of elements respect the change in display
* and therefore OpenGL context */
GstElement *pipeline = gst_parse_launch ("gltestsrc ! "
"capsfilter caps=video/x-raw(ANY),framerate=10/1 ! glupload ! "
"glcolorconvert ! glalpha noise-level=16 method=green angle=40 ! "
"glcolorbalance hue=0.25 ! gltransformation rotation-x=30 ! "
"glvideomixerelement ! glviewconvert output-mode-override=side-by-side ! "
"glstereosplit name=s "
"glstereomix name=m ! tee name=t ! queue ! fakesink sync=true "
"s.left ! queue ! m.sink_0 "
"s.right ! queue ! m.sink_1", NULL);
GstBus *bus = gst_element_get_bus (pipeline);
gst_bus_set_sync_handler (bus, on_sync_bus_message, pipeline, NULL);
gst_object_unref (bus);
/* the plugin must be loaded before loading the qml file to register the
* GstGLVideoItem qml item */
GstElement *sink = gst_element_factory_make ("qmlglsink", NULL);
g_assert (pipeline && sink);
gst_object_unref (sink);
QQuickWindow *rootObject;
/* The Qml scene starts out with the widget not connected to any qmlglsink
* element */
QQmlApplicationEngine engine;
engine.load(QUrl(QStringLiteral("qrc:/main.qml")));
/* find and set the videoItem on the sink */
rootObject = static_cast<QQuickWindow *> (engine.rootObjects().first());
gst_element_set_state (pipeline, GST_STATE_PLAYING);
GstElement *t = gst_bin_get_by_name (GST_BIN (pipeline), "t");
gst_object_unref (t); /* ref held by pipeline */
/* add the qmlglsink element */
QTimer::singleShot(5000, [pipeline, t, rootObject]() { connect_qmlglsink (pipeline, t, rootObject); } );
ret = app.exec();
gst_element_set_state (pipeline, GST_STATE_NULL);
gst_object_unref (pipeline);
}
gst_deinit ();
return ret;
}
import QtQuick 2.4
import QtQuick.Controls 1.1
import QtQuick.Controls.Styles 1.3
import QtQuick.Dialogs 1.2
import QtQuick.Window 2.1
import org.freedesktop.gstreamer.GLVideoItem 1.0
ApplicationWindow {
id: window
visible: true
width: 640
height: 480
x: 30
y: 30
color: "black"
Item {
anchors.fill: parent
GstGLVideoItem {
id: video
objectName: "videoItem"
anchors.centerIn: parent
width: parent.width
height: parent.height
}
Rectangle {
color: Qt.rgba(1, 1, 1, 0.7)
border.width: 1
border.color: "white"
anchors.bottom: video.bottom
anchors.bottomMargin: 15
anchors.horizontalCenter: parent.horizontalCenter
width : parent.width - 30
height: parent.height - 30
radius: 8
MouseArea {
id: mousearea
anchors.fill: parent
hoverEnabled: true
onEntered: {
parent.opacity = 1.0
hidetimer.start()
}
}
Timer {
id: hidetimer
interval: 5000
onTriggered: {
parent.opacity = 0.0
stop()
}
}
}
}
}
sources = [
'main.cpp',
]
if have_cxx and build_gstgl and gstgl_dep.found()
qt5_mod = import('qt5')
qt5qml_deps = dependency('qt5', modules : ['Core', 'Gui', 'Widgets', 'Qml', 'Quick'],
required: get_option('examples'))
# FIXME Add a way to get that information out of the qt5 module
moc = find_program('moc-qt5', 'moc', required : get_option('examples'))
if qt5qml_deps.found() and moc.found()
qt_preprocessed = qt5_mod.preprocess(qresources : 'qmlsink.qrc')
executable('qmlsink-dynamically-added', sources, qt_preprocessed,
dependencies : [gst_dep, gstgl_dep, qt5qml_deps],
c_args : gst_plugins_good_args,
include_directories : [configinc],
install: false)
endif
endif
TEMPLATE = app
QT += qml quick widgets
QT_CONFIG -= no-pkg-config
CONFIG += link_pkgconfig debug
PKGCONFIG = \
gstreamer-1.0 \
gstreamer-video-1.0
DEFINES += GST_USE_UNSTABLE_API
INCLUDEPATH += ../lib
SOURCES += main.cpp
RESOURCES += qmlsink.qrc
# Additional import path used to resolve QML modules in Qt Creator's code model
QML_IMPORT_PATH =
<RCC>
<qresource prefix="/">
<file>main.qml</file>
</qresource>
</RCC>
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