mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-19 08:11:16 +00:00
3f4bfa097a
Can take multiple input streams and a qml scene and layout the input videos inside the qml scene. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4609>
127 lines
3.6 KiB
C++
127 lines
3.6 KiB
C++
#include <QApplication>
|
|
#include <QQmlApplicationEngine>
|
|
#include <QQuickWindow>
|
|
#include <QQuickItem>
|
|
#include <QRunnable>
|
|
#include <QDirIterator>
|
|
#include <gst/gst.h>
|
|
|
|
class SetPlaying : public QRunnable
|
|
{
|
|
public:
|
|
SetPlaying(GstElement *);
|
|
~SetPlaying();
|
|
|
|
void run ();
|
|
|
|
private:
|
|
GstElement * pipeline_;
|
|
};
|
|
|
|
SetPlaying::SetPlaying (GstElement * pipeline)
|
|
{
|
|
this->pipeline_ = pipeline ? static_cast<GstElement *> (gst_object_ref (pipeline)) : NULL;
|
|
}
|
|
|
|
SetPlaying::~SetPlaying ()
|
|
{
|
|
if (this->pipeline_)
|
|
gst_object_unref (this->pipeline_);
|
|
}
|
|
|
|
void
|
|
SetPlaying::run ()
|
|
{
|
|
if (this->pipeline_)
|
|
gst_element_set_state (this->pipeline_, GST_STATE_PLAYING);
|
|
}
|
|
|
|
static void
|
|
on_mixer_scene_initialized (GstElement * mixer, gpointer unused)
|
|
{
|
|
QQuickItem *rootObject;
|
|
GST_INFO ("scene initialized");
|
|
g_object_get (mixer, "root-item", &rootObject, NULL);
|
|
|
|
QQuickItem *videoItem0 = rootObject->findChild<QQuickItem *> ("inputVideoItem0");
|
|
GstPad *sink0 = gst_element_get_static_pad (mixer, "sink_0");
|
|
g_object_set (sink0, "widget", videoItem0, NULL);
|
|
gst_clear_object (&sink0);
|
|
|
|
QQuickItem *videoItem1 = rootObject->findChild<QQuickItem *> ("inputVideoItem1");
|
|
GstPad *sink1 = gst_element_get_static_pad (mixer, "sink_1");
|
|
g_object_set (sink1, "widget", videoItem1, NULL);
|
|
gst_clear_object (&sink1);
|
|
}
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
int ret;
|
|
|
|
gst_init (&argc, &argv);
|
|
|
|
{
|
|
QGuiApplication app(argc, argv);
|
|
|
|
QQuickWindow::setGraphicsApi(QSGRendererInterface::OpenGL);
|
|
|
|
GstElement *pipeline = gst_pipeline_new (NULL);
|
|
GstElement *src0 = gst_element_factory_make ("videotestsrc", NULL);
|
|
GstElement *glupload0 = gst_element_factory_make ("glupload", NULL);
|
|
GstElement *src1 = gst_element_factory_make ("videotestsrc", NULL);
|
|
gst_util_set_object_arg ((GObject *) src1, "pattern", "ball");
|
|
GstElement *glupload1 = gst_element_factory_make ("glupload", NULL);
|
|
/* the plugin must be loaded before loading the qml file to register the
|
|
* GstGLVideoItem qml item */
|
|
GstElement *mixer = gst_element_factory_make ("qml6glmixer", NULL);
|
|
GstElement *sink = gst_element_factory_make ("qml6glsink", NULL);
|
|
|
|
g_assert (src0 && glupload0 && mixer && sink);
|
|
|
|
gst_bin_add_many (GST_BIN (pipeline), src0, glupload0, src1, glupload1, mixer, sink, NULL);
|
|
gst_element_link_many (src0, glupload0, mixer, sink, NULL);
|
|
gst_element_link_many (src1, glupload1, mixer, NULL);
|
|
|
|
/* load qmlglsink output */
|
|
QQmlApplicationEngine engine;
|
|
engine.load(QUrl(QStringLiteral("qrc:/main.qml")));
|
|
|
|
QQuickItem *videoItem;
|
|
QQuickWindow *rootObject;
|
|
|
|
/* find and set the videoItem on the sink */
|
|
rootObject = static_cast<QQuickWindow *> (engine.rootObjects().first());
|
|
videoItem = rootObject->findChild<QQuickItem *> ("videoItem");
|
|
g_assert (videoItem);
|
|
g_object_set(sink, "widget", videoItem, NULL);
|
|
|
|
QDirIterator it(":", QDirIterator::Subdirectories);
|
|
while (it.hasNext()) {
|
|
qDebug() << it.next();
|
|
}
|
|
|
|
QFile f(":/mixer.qml");
|
|
if(!f.open(QIODevice::ReadOnly)) {
|
|
qWarning() << "error: " << f.errorString();
|
|
return 1;
|
|
}
|
|
QByteArray overlay_scene = f.readAll();
|
|
qDebug() << overlay_scene;
|
|
|
|
/* load qmlgloverlay contents */
|
|
g_signal_connect (mixer, "qml-scene-initialized", G_CALLBACK (on_mixer_scene_initialized), NULL);
|
|
g_object_set (mixer, "qml-scene", overlay_scene.data(), NULL);
|
|
|
|
rootObject->scheduleRenderJob (new SetPlaying (pipeline),
|
|
QQuickWindow::BeforeSynchronizingStage);
|
|
|
|
ret = app.exec();
|
|
|
|
gst_element_set_state (pipeline, GST_STATE_NULL);
|
|
gst_object_unref (pipeline);
|
|
}
|
|
|
|
gst_deinit ();
|
|
|
|
return ret;
|
|
}
|