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new qt5 qml GL video sink

Browse source 
Very much in the same spirit as the Gtk GL sink

Two things are provided
1. A QQuickItem subclass that renders out RGBA filled GstGLMemory
   buffers that is instantiated from qml.
2. A sink element that will push buffers into (1)

To use
1. Declare the GstGLVideoItem in qml with an appropriate
   objectName property set.
2. Get the aforementioned GstGLVideoItem from qml using something like

QQmlApplicationEngine engine;
engine.load(QUrl(QStringLiteral("qrc:/main.qml")));

QObject *rootObject = engine.rootObjects().first();
QQuickItem *videoItem = rootObject->findChild<QQuickItem *> ("videoItem");

3. Set the videoItem on the sink

https://bugzilla.gnome.org/show_bug.cgi?id=752185
This commit is contained in:
Matthew Waters 2015-07-06 23:10:51 +10:00
parent d533bfddb5
commit 769fffa3d9
16 changed files with 1642 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

26
configure.ac
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@ -2602,6 +2602,30 @@ AG_GST_CHECK_FEATURE(GTK3, [Gtk+ elements], gtk, [
])
AM_CONDITIONAL(USE_GTK3_GL, test "x$HAVE_GTK3_GL" = "xyes")
dnl *** Qt ***
translit(dnm, m, l) AM_CONDITIONAL(USE_QT, true)
AG_GST_CHECK_FEATURE(QT, [Qt elements], qt, [
PKG_CHECK_MODULES(QT, Qt5Core Qt5Gui Qt5Quick, [
AC_CHECK_PROGS(MOC, [moc-qt5 moc])
AC_CHECK_PROGS(UIC, [uic-qt5 uic])
AC_CHECK_PROGS(RCC, [rcc])
if test "x$MOC" = "x" || test "x$UIC" = "x" || test "x$RCC" = "x"; then
AC_MSG_WARN([One of the required qt build programs was not found])
HAVE_QT="no"
else
HAVE_QT="yes"
PKG_CHECK_MODULES(QT_X11, Qt5X11Extras, [
QT_CFLAGS="$QT_CFLAGS $QT_X11_CFLAGS"
QT_LIBS="$QT_LIBS $QT_X11_LIBS"
AC_SUBST([QT_CFLAGS])
AC_SUBST([QT_LIBS])
], [])
fi
], [
HAVE_QT="no"
])
])
dnl *** libvisual ***
translit(dnm, m, l) AM_CONDITIONAL(USE_LIBVISUAL, true)
AG_GST_CHECK_FEATURE(LIBVISUAL, [libvisual visualization library], libvisual, [
@ -3032,6 +3056,7 @@ AM_CONDITIONAL(USE_OPENJPEG, false)
AM_CONDITIONAL(USE_OPENNI2, false)
AM_CONDITIONAL(USE_OPUS, false)
AM_CONDITIONAL(USE_PVR, false)
AM_CONDITIONAL(USE_QT, false)
AM_CONDITIONAL(USE_LIBVISUAL, false)
AM_CONDITIONAL(USE_TIMIDITY, false)
AM_CONDITIONAL(USE_WILDMIDI, false)
@ -3339,6 +3364,7 @@ ext/openh264/Makefile
ext/openjpeg/Makefile
ext/openni2/Makefile
ext/opus/Makefile
ext/qt/Makefile
ext/rsvg/Makefile
ext/resindvd/Makefile
ext/rtmp/Makefile

8
ext/Makefile.am
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@ -94,6 +94,12 @@ else
GTK3_DIR=
endif
if USE_QT
QT_DIR=qt
else
QT_DIR=
endif
if USE_RESINDVD
RESINDVD_DIR = resindvd
else
@ -443,6 +449,7 @@ SUBDIRS=\
$(RESINDVD_DIR) \
$(GL_DIR) \
$(GTK3_DIR) \
$(QT_DIR) \
$(FAAC_DIR) \
$(FAAD_DIR) \
$(FLITE_DIR) \
@ -524,6 +531,7 @@ DIST_SUBDIRS = \
dts \
gl \
gtk \
qt \
modplug \
mimic \
mpeg2enc \

1
ext/qt/.gitignore vendored Normal file
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@ -0,0 +1 @@
moc_*.cc

55
ext/qt/Makefile.am Normal file
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@ -0,0 +1,55 @@
# preamble
NULL =
moc_headers = \
qtitem.h \
gstqsgtexture.h \
$(NULL)
moc_generated = \
moc_qtitem.cc \
moc_gstqsgtexture.cc \
$(NULL)
#anything generated by the Qt tools...
BUILT_SOURCES = $(moc_generated)
CLEANFILES = $(moc_generated)
sources = \
gstqsgtexture.cc \
qtitem.cc \
gstqtsink.cc \
gstqtsink.h \
gstplugin.cc \
$(moc_headers) \
$(moc_generated) \
$(NULL)
libqtsink_la_CXXFLAGS = \
-I$(top_srcdir)/gst-libs \
-I$(top_builddir)/gst-libs \
$(GST_CXXFLAGS) \
$(GST_BASE_CFLAGS) \
$(GST_PLUGINS_BASE_CFLAGS) \
$(QT_CFLAGS)
libqtsink_la_LIBADD = \
$(GST_BASE_LIBS) \
$(GST_PLUGINS_BASE_LIBS) \
$(QT_LIBS) \
$(top_builddir)/gst-libs/gst/gl/libgstgl-$(GST_API_VERSION).la \
-lgstvideo-$(GST_API_VERSION)
libqtsink_la_SOURCES = $(sources)
libqtsink_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
libqtsink_la_LIBTOOLFLAGS = $(GST_PLUGIN_LIBTOOLFLAGS)
plugin_LTLIBRARIES = libqtsink.la
$(moc_generated): moc_%.cc: %.h
@@MOC@ -o$@ $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(MOC_CPPFLAGS) $<
ui-%.h: %.ui
@@UIC@ -o $@ $<
qrc-%.cc: %.qrc
@@RCC@ -o $@ $<

46
ext/qt/gstplugin.cc Normal file
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@ -0,0 +1,46 @@
/*
* GStreamer
* Copyright (C) 2015 Matthew Waters <matthew@centricular.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstqtsink.h"
#include <QQmlApplicationEngine>
static gboolean
plugin_init (GstPlugin * plugin)
{
if (!gst_element_register (plugin, "qmlglsink",
GST_RANK_NONE, GST_TYPE_QT_SINK)) {
return FALSE;
}
/* this means the plugin must be loaded before the qml engine is loaded */
qmlRegisterType<QtGLVideoItem> ("org.freedesktop.gstreamer.GLVideoItem", 1, 0, "GstGLVideoItem");
return TRUE;
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
qt,
"Qt sink",
plugin_init, PACKAGE_VERSION, GST_LICENSE, GST_PACKAGE_NAME,
GST_PACKAGE_ORIGIN)

142
ext/qt/gstqsgtexture.cc Normal file
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@ -0,0 +1,142 @@
/*
* GStreamer
* Copyright (C) 2015 Matthew Waters <matthew@centricular.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <gst/video/video.h>
#include <gst/gl/gl.h>
#include "gstqsgtexture.h"
#define GST_CAT_DEFAULT gst_qsg_texture_debug
GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
GstQSGTexture::GstQSGTexture ()
{
static volatile gsize _debug;
initializeOpenGLFunctions();
if (g_once_init_enter (&_debug)) {
GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "qtqsgtexture", 0,
"Qt Scenegraph Texture");
g_once_init_leave (&_debug, 1);
}
gst_video_info_init (&this->v_info);
this->buffer_ = NULL;
}
GstQSGTexture::~GstQSGTexture ()
{
gst_buffer_replace (&this->buffer_, NULL);
}
/* only called from the streaming thread with scene graph thread blocked */
void
GstQSGTexture::setCaps (GstCaps * caps)
{
GST_LOG ("%p setCaps %" GST_PTR_FORMAT, this, caps);
gst_video_info_from_caps (&this->v_info, caps);
}
/* only called from the streaming thread with scene graph thread blocked */
void
GstQSGTexture::setBuffer (GstBuffer * buffer)
{
GST_LOG ("%p setBuffer %" GST_PTR_FORMAT, this, buffer);
/* FIXME: update more state here */
gst_buffer_replace (&this->buffer_, buffer);
}
/* only called from qt's scene graph render thread */
void
GstQSGTexture::bind ()
{
guint tex_id;
if (!this->buffer_)
return;
if (GST_VIDEO_INFO_FORMAT (&this->v_info) == GST_VIDEO_FORMAT_UNKNOWN)
return;
/* FIXME: should really lock the memory to prevent write access */
if (!gst_video_frame_map (&this->v_frame, &this->v_info, this->buffer_,
(GstMapFlags) (GST_MAP_READ | GST_MAP_GL))) {
g_assert_not_reached ();
return;
}
tex_id = *(guint *) this->v_frame.data[0];
GST_LOG ("%p binding Qt texture %u", this, tex_id);
glBindTexture (GL_TEXTURE_2D, tex_id);
gst_video_frame_unmap (&this->v_frame);
}
/* can be called from any thread */
int
GstQSGTexture::textureId () const
{
int tex_id = 0;
if (this->buffer_) {
GstMemory *mem = gst_buffer_peek_memory (this->buffer_, 0);
tex_id = ((GstGLMemory *) mem)->tex_id;
}
GST_LOG ("%p get texture id %u", this, tex_id);
return tex_id;
}
/* can be called from any thread */
QSize
GstQSGTexture::textureSize () const
{
if (GST_VIDEO_INFO_FORMAT (&this->v_info) == GST_VIDEO_FORMAT_UNKNOWN)
return QSize (0, 0);
GST_TRACE ("%p get texture size %ux%u", this, this->v_info.width,
this->v_info.height);
return QSize (this->v_info.width, this->v_info.height);
}
/* can be called from any thread */
bool
GstQSGTexture::hasAlphaChannel () const
{
/* FIXME: support RGB textures */
return true;
}
/* can be called from any thread */
bool
GstQSGTexture::hasMipmaps () const
{
return false;
}

52
ext/qt/gstqsgtexture.h Normal file
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@ -0,0 +1,52 @@
/*
* GStreamer
* Copyright (C) 2015 Matthew Waters <matthew@centricular.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GST_QSG_TEXTURE_H__
#define __GST_QSG_TEXTURE_H__
#include <gst/gst.h>
#include <QSGTexture>
#include <QOpenGLFunctions>
#include <gst/video/video.h>
class GstQSGTexture : public QSGTexture, protected QOpenGLFunctions
{
Q_OBJECT
public:
GstQSGTexture ();
~GstQSGTexture ();
void setCaps (GstCaps * caps);
void setBuffer (GstBuffer * buffer);
/* QSGTexture */
void bind ();
int textureId () const;
QSize textureSize () const;
bool hasAlphaChannel () const;
bool hasMipmaps () const;
private:
GstBuffer * buffer_;
GstVideoInfo v_info;
GstVideoFrame v_frame;
};
#endif /* __GST_QSG_TEXTURE_H__ */

500
ext/qt/gstqtsink.cc Normal file
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@ -0,0 +1,500 @@
/*
* GStreamer
* Copyright (C) 2015 Matthew Waters <matthew@centricular.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:gstqtsink
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstqtsink.h"
#include <QGuiApplication>
#define GST_CAT_DEFAULT gst_debug_qt_gl_sink
GST_DEBUG_CATEGORY (GST_CAT_DEFAULT);
static void gst_qt_sink_finalize (GObject * object);
static void gst_qt_sink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * param_spec);
static void gst_qt_sink_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * param_spec);
static gboolean gst_qt_sink_stop (GstBaseSink * bsink);
static gboolean gst_qt_sink_query (GstBaseSink * bsink, GstQuery * query);
static GstStateChangeReturn
gst_qt_sink_change_state (GstElement * element, GstStateChange transition);
static void gst_qt_sink_get_times (GstBaseSink * bsink, GstBuffer * buf,
GstClockTime * start, GstClockTime * end);
static gboolean gst_qt_sink_set_caps (GstBaseSink * bsink, GstCaps * caps);
static GstFlowReturn gst_qt_sink_show_frame (GstVideoSink * bsink,
GstBuffer * buf);
static gboolean gst_qt_sink_propose_allocation (GstBaseSink * bsink,
GstQuery * query);
static GstStaticPadTemplate gst_qt_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE_WITH_FEATURES
(GST_CAPS_FEATURE_MEMORY_GL_MEMORY, "RGBA")));
#define DEFAULT_FORCE_ASPECT_RATIO TRUE
#define DEFAULT_PAR_N 0
#define DEFAULT_PAR_D 1
enum
{
ARG_0,
PROP_WIDGET,
PROP_FORCE_ASPECT_RATIO,
PROP_PIXEL_ASPECT_RATIO,
};
enum
{
SIGNAL_0,
LAST_SIGNAL
};
#define gst_qt_sink_parent_class parent_class
G_DEFINE_TYPE_WITH_CODE (GstQtSink, gst_qt_sink,
GST_TYPE_VIDEO_SINK, GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT,
"qtsink", 0, "Qt Video Sink"));
static void
gst_qt_sink_class_init (GstQtSinkClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
GstBaseSinkClass *gstbasesink_class;
GstVideoSinkClass *gstvideosink_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gstbasesink_class = (GstBaseSinkClass *) klass;
gstvideosink_class = (GstVideoSinkClass *) klass;
gobject_class->set_property = gst_qt_sink_set_property;
gobject_class->get_property = gst_qt_sink_get_property;
gst_element_class_set_metadata (gstelement_class, "Qt Video Sink",
"Sink/Video", "A video sink the renders to a QQuickItem",
"Matthew Waters <matthew@centricular.com>");
g_object_class_install_property (gobject_class, PROP_WIDGET,
g_param_spec_pointer ("widget", "QQuickItem",
"The QQuickItem to place in the object heirachy",
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
g_object_class_install_property (gobject_class, PROP_FORCE_ASPECT_RATIO,
g_param_spec_boolean ("force-aspect-ratio",
"Force aspect ratio",
"When enabled, scaling will respect original aspect ratio",
DEFAULT_FORCE_ASPECT_RATIO,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
g_object_class_install_property (gobject_class, PROP_PIXEL_ASPECT_RATIO,
gst_param_spec_fraction ("pixel-aspect-ratio", "Pixel Aspect Ratio",
"The pixel aspect ratio of the device", DEFAULT_PAR_N, DEFAULT_PAR_D,
G_MAXINT, 1, 1, 1,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&gst_qt_sink_template));
gobject_class->finalize = gst_qt_sink_finalize;
gstelement_class->change_state = gst_qt_sink_change_state;
gstbasesink_class->query = gst_qt_sink_query;
gstbasesink_class->set_caps = gst_qt_sink_set_caps;
gstbasesink_class->get_times = gst_qt_sink_get_times;
gstbasesink_class->propose_allocation = gst_qt_sink_propose_allocation;
gstbasesink_class->stop = gst_qt_sink_stop;
gstvideosink_class->show_frame = gst_qt_sink_show_frame;
}
static void
gst_qt_sink_init (GstQtSink * qt_sink)
{
}
static void
gst_qt_sink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstQtSink *qt_sink = GST_QT_SINK (object);
switch (prop_id) {
case PROP_WIDGET:
qt_sink->widget = static_cast<QtGLVideoItem *> (g_value_get_pointer (value));
break;
case PROP_FORCE_ASPECT_RATIO:
g_return_if_fail (qt_sink->widget);
qt_sink->widget->setForceAspectRatio (g_value_get_boolean (value));
break;
case PROP_PIXEL_ASPECT_RATIO:
g_return_if_fail (qt_sink->widget);
qt_sink->widget->setDAR (gst_value_get_fraction_numerator (value),
gst_value_get_fraction_denominator (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
_reset (GstQtSink * qt_sink)
{
if (qt_sink->display) {
gst_object_unref (qt_sink->display);
qt_sink->display = NULL;
}
if (qt_sink->context) {
gst_object_unref (qt_sink->context);
qt_sink->context = NULL;
}
if (qt_sink->qt_context) {
gst_object_unref (qt_sink->qt_context);
qt_sink->qt_context = NULL;
}
}
static void
gst_qt_sink_finalize (GObject * object)
{
GstQtSink *qt_sink = GST_QT_SINK (object);
_reset (qt_sink);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_qt_sink_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstQtSink *qt_sink = GST_QT_SINK (object);
switch (prop_id) {
case PROP_WIDGET:
g_value_set_pointer (value, qt_sink->widget);
break;
case PROP_FORCE_ASPECT_RATIO:
if (qt_sink->widget)
g_value_set_boolean (value, qt_sink->widget->getForceAspectRatio ());
else
g_value_set_boolean (value, DEFAULT_FORCE_ASPECT_RATIO);
break;
case PROP_PIXEL_ASPECT_RATIO:
if (qt_sink->widget) {
gint num, den;
qt_sink->widget->getDAR (&num, &den);
gst_value_set_fraction (value, num, den);
} else {
gst_value_set_fraction (value, DEFAULT_PAR_N, DEFAULT_PAR_D);
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
gst_qt_sink_query (GstBaseSink * bsink, GstQuery * query)
{
GstQtSink *qt_sink = GST_QT_SINK (bsink);
gboolean res = FALSE;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_CONTEXT:
{
const gchar *context_type;
GstContext *context, *old_context;
gboolean ret;
ret = gst_gl_handle_context_query ((GstElement *) qt_sink, query,
&qt_sink->display, &qt_sink->qt_context);
if (qt_sink->display)
gst_gl_display_filter_gl_api (qt_sink->display, gst_gl_context_get_gl_api (qt_sink->qt_context));
gst_query_parse_context_type (query, &context_type);
if (g_strcmp0 (context_type, "gst.gl.local_context") == 0) {
GstStructure *s;
gst_query_parse_context (query, &old_context);
if (old_context)
context = gst_context_copy (old_context);
else
context = gst_context_new ("gst.gl.local_context", FALSE);
s = gst_context_writable_structure (context);
gst_structure_set (s, "context", GST_GL_TYPE_CONTEXT, qt_sink->context,
NULL);
gst_query_set_context (query, context);
gst_context_unref (context);
ret = qt_sink->context != NULL;
}
GST_LOG_OBJECT (qt_sink, "context query of type %s %i", context_type,
ret);
if (ret)
return ret;
}
default:
res = GST_BASE_SINK_CLASS (parent_class)->query (bsink, query);
break;
}
return res;
}
static gboolean
gst_qt_sink_stop (GstBaseSink * bsink)
{
return TRUE;
}
static GstStateChangeReturn
gst_qt_sink_change_state (GstElement * element, GstStateChange transition)
{
GstQtSink *qt_sink = GST_QT_SINK (element);
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
QGuiApplication *app;
GST_DEBUG ("changing state: %s => %s",
gst_element_state_get_name (GST_STATE_TRANSITION_CURRENT (transition)),
gst_element_state_get_name (GST_STATE_TRANSITION_NEXT (transition)));
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
app = dynamic_cast<QGuiApplication *> (QCoreApplication::instance ());
if (!app) {
GST_ELEMENT_ERROR (element, RESOURCE, NOT_FOUND,
("%s", "Failed to connect to Qt"),
("%s", "Could not retreive QGuiApplication instance"));
return GST_STATE_CHANGE_FAILURE;
}
if (!qt_sink->widget) {
GST_ELEMENT_ERROR (element, RESOURCE, NOT_FOUND,
("%s", "Required property \'widget\' not set"),
(NULL));
return GST_STATE_CHANGE_FAILURE;
}
if (!qt_item_init_winsys (qt_sink->widget)) {
GST_ELEMENT_ERROR (element, RESOURCE, NOT_FOUND,
("%s", "Could not initialize window system"),
(NULL));
return GST_STATE_CHANGE_FAILURE;
}
qt_sink->display = qt_item_get_display (qt_sink->widget);
qt_sink->context = qt_item_get_context (qt_sink->widget);
qt_sink->qt_context = qt_item_get_qt_context (qt_sink->widget);
if (!qt_sink->display || !qt_sink->context || !qt_sink->qt_context) {
GST_ELEMENT_ERROR (element, RESOURCE, NOT_FOUND,
("%s", "Could not retreive window system OpenGL configuration"),
(NULL));
return GST_STATE_CHANGE_FAILURE;
}
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret == GST_STATE_CHANGE_FAILURE)
return ret;
switch (transition) {
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
qt_item_set_buffer (qt_sink->widget, NULL);
break;
case GST_STATE_CHANGE_READY_TO_NULL:
break;
default:
break;
}
return ret;
}
static void
gst_qt_sink_get_times (GstBaseSink * bsink, GstBuffer * buf,
GstClockTime * start, GstClockTime * end)
{
GstQtSink *qt_sink;
qt_sink = GST_QT_SINK (bsink);
if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
*start = GST_BUFFER_TIMESTAMP (buf);
if (GST_BUFFER_DURATION_IS_VALID (buf))
*end = *start + GST_BUFFER_DURATION (buf);
else {
if (GST_VIDEO_INFO_FPS_N (&qt_sink->v_info) > 0) {
*end = *start +
gst_util_uint64_scale_int (GST_SECOND,
GST_VIDEO_INFO_FPS_D (&qt_sink->v_info),
GST_VIDEO_INFO_FPS_N (&qt_sink->v_info));
}
}
}
}
gboolean
gst_qt_sink_set_caps (GstBaseSink * bsink, GstCaps * caps)
{
GstQtSink *qt_sink = GST_QT_SINK (bsink);
GST_DEBUG ("set caps with %" GST_PTR_FORMAT, caps);
if (!gst_video_info_from_caps (&qt_sink->v_info, caps))
return FALSE;
if (!qt_item_set_caps (qt_sink->widget, caps))
return FALSE;
return TRUE;
}
static GstFlowReturn
gst_qt_sink_show_frame (GstVideoSink * vsink, GstBuffer * buf)
{
GstQtSink *qt_sink;
GST_TRACE ("rendering buffer:%p", buf);
qt_sink = GST_QT_SINK (vsink);
qt_item_set_buffer (qt_sink->widget, buf);
return GST_FLOW_OK;
}
static gboolean
gst_qt_sink_propose_allocation (GstBaseSink * bsink, GstQuery * query)
{
GstQtSink *qt_sink = GST_QT_SINK (bsink);
GstBufferPool *pool;
GstStructure *config;
GstCaps *caps;
guint size;
gboolean need_pool;
if (!qt_sink->display || !qt_sink->context)
return FALSE;
gst_query_parse_allocation (query, &caps, &need_pool);
if (caps == NULL)
goto no_caps;
if ((pool = qt_sink->pool))
gst_object_ref (pool);
if (pool != NULL) {
GstCaps *pcaps;
/* we had a pool, check caps */
GST_DEBUG_OBJECT (qt_sink, "check existing pool caps");
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_get_params (config, &pcaps, &size, NULL, NULL);
if (!gst_caps_is_equal (caps, pcaps)) {
GST_DEBUG_OBJECT (qt_sink, "pool has different caps");
/* different caps, we can't use this pool */
gst_object_unref (pool);
pool = NULL;
}
gst_structure_free (config);
}
if (pool == NULL && need_pool) {
GstVideoInfo info;
if (!gst_video_info_from_caps (&info, caps))
goto invalid_caps;
GST_DEBUG_OBJECT (qt_sink, "create new pool");
pool = gst_gl_buffer_pool_new (qt_sink->context);
/* the normal size of a frame */
size = info.size;
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_set_params (config, caps, size, 0, 0);
if (!gst_buffer_pool_set_config (pool, config))
goto config_failed;
}
/* we need at least 2 buffer because we hold on to the last one */
if (pool) {
gst_query_add_allocation_pool (query, pool, size, 2, 0);
gst_object_unref (pool);
}
/* we also support various metadata */
gst_query_add_allocation_meta (query, GST_VIDEO_META_API_TYPE, 0);
if (qt_sink->context->gl_vtable->FenceSync)
gst_query_add_allocation_meta (query, GST_GL_SYNC_META_API_TYPE, 0);
return TRUE;
/* ERRORS */
no_caps:
{
GST_DEBUG_OBJECT (bsink, "no caps specified");
return FALSE;
}
invalid_caps:
{
GST_DEBUG_OBJECT (bsink, "invalid caps specified");
return FALSE;
}
config_failed:
{
GST_DEBUG_OBJECT (bsink, "failed setting config");
return FALSE;
}
}

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/*
* GStreamer
* Copyright (C) 2015 Matthew Waters <matthew@centricular.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GST_QT_SINK_H__
#define __GST_QT_SINK_H__
#include <gst/gst.h>
#include <gst/video/gstvideosink.h>
#include <gst/video/video.h>
#include <gst/gl/gl.h>
#include "qtitem.h"
typedef struct _GstQtSink GstQtSink;
typedef struct _GstQtSinkClass GstQtSinkClass;
typedef struct _GstQtSinkPrivate GstQtSinkPrivate;
G_BEGIN_DECLS
GType gst_qt_sink_get_type (void);
#define GST_TYPE_QT_SINK (gst_qt_sink_get_type())
#define GST_QT_SINK(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_QT_SINK,GstQtSink))
#define GST_QT_SINK_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_QT_SINK,GstQtSinkClass))
#define GST_IS_QT_SINK(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_QT_SINK))
#define GST_IS_QT_SINK_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_QT_SINK))
#define GST_QT_SINK_CAST(obj) ((GstQtSink*)(obj))
/**
* GstQtSink:
*
* Opaque #GstQtSink object
*/
struct _GstQtSink
{
/* <private> */
GstVideoSink parent;
QtGLVideoItem *widget;
GstVideoInfo v_info;
GstBufferPool *pool;
GstGLDisplay *display;
GstGLContext *context;
GstGLContext *qt_context;
GstQtSinkPrivate *priv;
};
/**
* GstQtSinkClass:
*
* The #GstQtSinkClass struct only contains private data
*/
struct _GstQtSinkClass
{
/* <private> */
GstVideoSinkClass object_class;
};
GstQtSink * gst_qt_sink_new (void);
G_END_DECLS
#endif /* __GST_QT_SINK_H__ */

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/*
* GStreamer
* Copyright (C) 2015 Matthew Waters <matthew@centricular.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <gst/video/video.h>
#include <QGuiApplication>
#include <QQuickWindow>
#include <QSGSimpleTextureNode>
#include "qtitem.h"
#include "gstqsgtexture.h"
#if GST_GL_HAVE_WINDOW_X11
#include <QX11Info>
#include <gst/gl/x11/gstgldisplay_x11.h>
#include <gst/gl/x11/gstglcontext_glx.h>
#endif
#if GST_GL_HAVE_WINDOW_WAYLAND
#include <gst/gl/wayland/gstgldisplay_wayland.h>
#endif
/**
* SECTION:gtkgstglwidget
* @short_description: a #GtkGLArea that renders GStreamer video #GstBuffers
* @see_also: #GtkGLArea, #GstBuffer
*
* #QtGLVideoItem is an #GtkWidget that renders GStreamer video buffers.
*/
#define GST_CAT_DEFAULT qt_item_debug
GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
#define GTK_GST_GL_WIDGET_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), \
GTK_TYPE_GST_GL_WIDGET, QtGLVideoItemPrivate))
#define DEFAULT_FORCE_ASPECT_RATIO TRUE
#define DEFAULT_PAR_N 0
#define DEFAULT_PAR_D 1
enum
{
PROP_0,
PROP_FORCE_ASPECT_RATIO,
PROP_PIXEL_ASPECT_RATIO,
};
struct _QtGLVideoItemPrivate
{
GMutex lock;
/* properties */
gboolean force_aspect_ratio;
gint par_n, par_d;
gint display_width;
gint display_height;
gboolean negotiated;
GstBuffer *buffer;
GstCaps *caps;
GstVideoInfo v_info;
gboolean initted;
GstGLDisplay *display;
QOpenGLContext *qt_context;
GstGLContext *other_context;
GstGLContext *context;
};
QtGLVideoItem::QtGLVideoItem()
{
QGuiApplication *app = dynamic_cast<QGuiApplication *> (QCoreApplication::instance ());
static volatile gsize _debug;
g_assert (app != NULL);
if (g_once_init_enter (&_debug)) {
GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "qtglwidget", 0, "Qt GL Widget");
g_once_init_leave (&_debug, 1);
}
this->setFlag (QQuickItem::ItemHasContents, true);
this->priv = g_new0 (QtGLVideoItemPrivate, 1);
this->priv->force_aspect_ratio = DEFAULT_FORCE_ASPECT_RATIO;
this->priv->par_n = DEFAULT_PAR_N;
this->priv->par_d = DEFAULT_PAR_D;
g_mutex_init (&this->priv->lock);
#if GST_GL_HAVE_WINDOW_X11
if (QString::fromUtf8 ("xcb") == app->platformName())
this->priv->display = (GstGLDisplay *)
gst_gl_display_x11_new_with_display (QX11Info::display ());
#endif
if (!this->priv->display)
this->priv->display = gst_gl_display_new ();
connect(this, SIGNAL(windowChanged(QQuickWindow*)), this,
SLOT(handleWindowChanged(QQuickWindow*)));
GST_DEBUG ("%p init Qt Video Item", this);
}
QtGLVideoItem::~QtGLVideoItem()
{
g_mutex_clear (&this->priv->lock);
g_free (this->priv);
this->priv = NULL;
}
void
QtGLVideoItem::setDAR(gint num, gint den)
{
this->priv->par_n = num;
this->priv->par_d = den;
}
void
QtGLVideoItem::getDAR(gint * num, gint * den)
{
if (num)
*num = this->priv->par_n;
if (den)
*den = this->priv->par_d;
}
void
QtGLVideoItem::setForceAspectRatio(bool far)
{
this->priv->force_aspect_ratio = far;
}
bool
QtGLVideoItem::getForceAspectRatio()
{
return this->priv->force_aspect_ratio;
}
QSGNode *
QtGLVideoItem::updatePaintNode(QSGNode * oldNode,
UpdatePaintNodeData * updatePaintNodeData)
{
QSGSimpleTextureNode *texNode = static_cast<QSGSimpleTextureNode *> (oldNode);
GstVideoRectangle src, dst, result;
GstQSGTexture *tex;
g_mutex_lock (&this->priv->lock);
GST_TRACE ("%p updatePaintNode", this);
if (!this->priv->caps) {
g_mutex_unlock (&this->priv->lock);
return NULL;
}
if (!texNode) {
texNode = new QSGSimpleTextureNode ();
tex = new GstQSGTexture ();
texNode->setTexture (tex);
} else {
tex = static_cast<GstQSGTexture *> (texNode->texture());
}
tex->setCaps (this->priv->caps);
tex->setBuffer (this->priv->buffer);
if (this->priv->force_aspect_ratio) {
src.w = this->priv->display_width;
src.h = this->priv->display_height;
dst.x = boundingRect().x();
dst.y = boundingRect().y();
dst.w = boundingRect().width();
dst.h = boundingRect().height();
gst_video_sink_center_rect (src, dst, &result, TRUE);
} else {
result.x = boundingRect().x();
result.y = boundingRect().y();
result.w = boundingRect().width();
result.h = boundingRect().height();
}
texNode->setRect (QRectF (result.x, result.y, result.w, result.h));
g_mutex_unlock (&this->priv->lock);
return texNode;
}
static void
_reset (QtGLVideoItem * qt_item)
{
gst_buffer_replace (&qt_item->priv->buffer, NULL);
gst_caps_replace (&qt_item->priv->caps, NULL);
qt_item->priv->negotiated = FALSE;
qt_item->priv->initted = FALSE;
}
void
qt_item_set_buffer (QtGLVideoItem * widget, GstBuffer * buffer)
{
g_return_if_fail (widget != NULL);
g_return_if_fail (widget->priv->negotiated);
g_mutex_lock (&widget->priv->lock);
gst_buffer_replace (&widget->priv->buffer, buffer);
QMetaObject::invokeMethod(widget, "update", Qt::QueuedConnection);
g_mutex_unlock (&widget->priv->lock);
}
void
QtGLVideoItem::onSceneGraphInitialized ()
{
GstGLPlatform platform;
GstGLAPI gl_api;
guintptr gl_handle;
GST_DEBUG ("scene graph initialization with Qt GL context %p",
this->window()->openglContext ());
if (this->priv->qt_context == this->window()->openglContext ())
return;
this->priv->qt_context = this->window()->openglContext ();
if (this->priv->qt_context == NULL) {
g_assert_not_reached ();
return;
}
#if GST_GL_HAVE_WINDOW_X11
if (GST_IS_GL_DISPLAY_X11 (this->priv->display)) {
platform = GST_GL_PLATFORM_GLX;
gl_api = gst_gl_context_get_current_gl_api (NULL, NULL);
gl_handle = gst_gl_context_get_current_gl_context (platform);
if (gl_handle)
this->priv->other_context =
gst_gl_context_new_wrapped (this->priv->display, gl_handle,
platform, gl_api);
}
#endif
#if GST_GL_HAVE_WINDOW_WAYLAND
if (GST_IS_GL_DISPLAY_WAYLAND (this->priv->display)) {
platform = GST_GL_PLATFORM_EGL;
gl_api = gst_gl_context_get_current_gl_api (NULL, NULL);
gl_handle = gst_gl_context_get_current_gl_context (platform);
if (gl_handle)
this->priv->other_context =
gst_gl_context_new_wrapped (this->priv->display, gl_handle,
platform, gl_api);
}
#endif
(void) platform;
(void) gl_api;
(void) gl_handle;
if (this->priv->other_context) {
GError *error = NULL;
gst_gl_context_activate (this->priv->other_context, TRUE);
if (!gst_gl_context_fill_info (this->priv->other_context, &error)) {
GST_ERROR ("%p failed to retreive qt context info: %s", this, error->message);
g_object_unref (this->priv->other_context);
this->priv->other_context = NULL;
} else {
gst_gl_display_filter_gl_api (this->priv->display, gst_gl_context_get_gl_api (this->priv->other_context));
gst_gl_context_activate (this->priv->other_context, FALSE);
}
}
GST_DEBUG ("%p created wrapped GL context %" GST_PTR_FORMAT, this,
this->priv->other_context);
}
void
QtGLVideoItem::onSceneGraphInvalidated ()
{
GST_FIXME ("%p scene graph invalidated", this);
}
gboolean
qt_item_init_winsys (QtGLVideoItem * widget)
{
g_return_val_if_fail (widget != NULL, FALSE);
g_mutex_lock (&widget->priv->lock);
if (widget->priv->display && widget->priv->qt_context
&& widget->priv->other_context && widget->priv->context) {
/* already have the necessary state */
g_mutex_unlock (&widget->priv->lock);
return TRUE;
}
if (!GST_IS_GL_DISPLAY (widget->priv->display)) {
GST_ERROR ("%p failed to retreive display connection %" GST_PTR_FORMAT,
widget, widget->priv->display);
g_mutex_unlock (&widget->priv->lock);
return FALSE;
}
if (!GST_GL_IS_CONTEXT (widget->priv->other_context)) {
GST_ERROR ("%p failed to retreive wrapped context %" GST_PTR_FORMAT, widget,
widget->priv->other_context);
g_mutex_unlock (&widget->priv->lock);
return FALSE;
}
widget->priv->context = gst_gl_context_new (widget->priv->display);
if (!widget->priv->context) {
g_mutex_unlock (&widget->priv->lock);
return FALSE;
}
gst_gl_context_create (widget->priv->context, widget->priv->other_context,
NULL);
g_mutex_unlock (&widget->priv->lock);
return TRUE;
}
void
QtGLVideoItem::handleWindowChanged(QQuickWindow *win)
{
if (win) {
connect(win, SIGNAL(sceneGraphInitialized()), this, SLOT(onSceneGraphInitialized()), Qt::DirectConnection);
connect(win, SIGNAL(sceneGraphInvalidated()), this, SLOT(onSceneGraphInvalidated()), Qt::DirectConnection);
} else {
this->priv->qt_context = NULL;
}
}
static gboolean
_calculate_par (QtGLVideoItem * widget, GstVideoInfo * info)
{
gboolean ok;
gint width, height;
gint par_n, par_d;
gint display_par_n, display_par_d;
guint display_ratio_num, display_ratio_den;
width = GST_VIDEO_INFO_WIDTH (info);
height = GST_VIDEO_INFO_HEIGHT (info);
par_n = GST_VIDEO_INFO_PAR_N (info);
par_d = GST_VIDEO_INFO_PAR_D (info);
if (!par_n)
par_n = 1;
/* get display's PAR */
if (widget->priv->par_n != 0 && widget->priv->par_d != 0) {
display_par_n = widget->priv->par_n;
display_par_d = widget->priv->par_d;
} else {
display_par_n = 1;
display_par_d = 1;
}
ok = gst_video_calculate_display_ratio (&display_ratio_num,
&display_ratio_den, width, height, par_n, par_d, display_par_n,
display_par_d);
if (!ok)
return FALSE;
GST_LOG ("PAR: %u/%u DAR:%u/%u", par_n, par_d, display_par_n, display_par_d);
if (height % display_ratio_den == 0) {
GST_DEBUG ("keeping video height");
widget->priv->display_width = (guint)
gst_util_uint64_scale_int (height, display_ratio_num,
display_ratio_den);
widget->priv->display_height = height;
} else if (width % display_ratio_num == 0) {
GST_DEBUG ("keeping video width");
widget->priv->display_width = width;
widget->priv->display_height = (guint)
gst_util_uint64_scale_int (width, display_ratio_den, display_ratio_num);
} else {
GST_DEBUG ("approximating while keeping video height");
widget->priv->display_width = (guint)
gst_util_uint64_scale_int (height, display_ratio_num,
display_ratio_den);
widget->priv->display_height = height;
}
GST_DEBUG ("scaling to %dx%d", widget->priv->display_width,
widget->priv->display_height);
return TRUE;
}
gboolean
qt_item_set_caps (QtGLVideoItem * widget, GstCaps * caps)
{
GstVideoInfo v_info;
g_return_val_if_fail (widget != NULL, FALSE);
g_return_val_if_fail (GST_IS_CAPS (caps), FALSE);
g_return_val_if_fail (gst_caps_is_fixed (caps), FALSE);
if (widget->priv->caps && gst_caps_is_equal_fixed (widget->priv->caps, caps))
return TRUE;
if (!gst_video_info_from_caps (&v_info, caps))
return FALSE;
g_mutex_lock (&widget->priv->lock);
_reset (widget);
gst_caps_replace (&widget->priv->caps, caps);
if (!_calculate_par (widget, &v_info)) {
g_mutex_unlock (&widget->priv->lock);
return FALSE;
}
widget->priv->v_info = v_info;
widget->priv->negotiated = TRUE;
g_mutex_unlock (&widget->priv->lock);
return TRUE;
}
GstGLContext *
qt_item_get_qt_context (QtGLVideoItem * qt_item)
{
g_return_val_if_fail (qt_item != NULL, NULL);
if (!qt_item->priv->other_context)
return NULL;
return (GstGLContext *) gst_object_ref (qt_item->priv->other_context);
}
GstGLContext *
qt_item_get_context (QtGLVideoItem * qt_item)
{
g_return_val_if_fail (qt_item != NULL, NULL);
if (!qt_item->priv->context)
return NULL;
return (GstGLContext *) gst_object_ref (qt_item->priv->context);
}
GstGLDisplay *
qt_item_get_display (QtGLVideoItem * qt_item)
{
g_return_val_if_fail (qt_item != NULL, NULL);
if (!qt_item->priv->display)
return NULL;
return (GstGLDisplay *) gst_object_ref (qt_item->priv->display);
}

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/*
* GStreamer
* Copyright (C) 2015 Matthew Waters <matthew@centricular.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __QT_ITEM_H__
#define __QT_ITEM_H__
#include <gst/gst.h>
#include <gst/gl/gl.h>
#include <QQuickItem>
#include <QOpenGLContext>
#include <QOpenGLFunctions>
typedef struct _QtGLVideoItemPrivate QtGLVideoItemPrivate;
class QtGLVideoItem : public QQuickItem, protected QOpenGLFunctions
{
Q_OBJECT
public:
QtGLVideoItem();
~QtGLVideoItem();
void setDAR(gint, gint);
void getDAR(gint *, gint *);
void setForceAspectRatio(bool);
bool getForceAspectRatio();
/* private for C interface ... */
QtGLVideoItemPrivate *priv;
private Q_SLOTS:
void handleWindowChanged(QQuickWindow * win);
void onSceneGraphInitialized();
void onSceneGraphInvalidated();
protected:
QSGNode * updatePaintNode (QSGNode * oldNode, UpdatePaintNodeData * updatePaintNodeData);
private:
void setViewportSize(const QSize &size);
void shareContext();
QSize m_viewportSize;
};
extern "C"
{
void qt_item_set_buffer (QtGLVideoItem * widget, GstBuffer * buffer);
gboolean qt_item_set_caps (QtGLVideoItem * widget, GstCaps * caps);
gboolean qt_item_init_winsys (QtGLVideoItem * widget);
GstGLContext * qt_item_get_qt_context (QtGLVideoItem * qt_item);
GstGLContext * qt_item_get_context (QtGLVideoItem * qt_item);
GstGLDisplay * qt_item_get_display (QtGLVideoItem * qt_item);
}
#endif /* __QT_ITEM_H__ */

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deployment.pri
play
qrc_qml.cpp

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#include <QApplication>
#include <QQmlApplicationEngine>
#include <QQuickWindow>
#include <QQuickItem>
#include <QRunnable>
#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);
}
int main(int argc, char *argv[])
{
int ret;
QGuiApplication app(argc, argv);
gst_init (&argc, &argv);
GstElement *pipeline = gst_pipeline_new (NULL);
GstElement *src = gst_element_factory_make ("videotestsrc", NULL);
GstElement *glupload = gst_element_factory_make ("glupload", NULL);
/* 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 (src && glupload && sink);
gst_bin_add_many (GST_BIN (pipeline), src, glupload, sink, NULL);
gst_element_link_many (src, glupload, sink, NULL);
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);
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;
}

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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 : childrenRect.width + 20
height: childrenRect.height + 20
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()
}
}
}
}
}

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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 += qml.qrc
# Additional import path used to resolve QML modules in Qt Creator's code model
QML_IMPORT_PATH =

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tests/examples/qt/qml/qml.qrc Normal file
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<RCC>
<qresource prefix="/">
<file>main.qml</file>
</qresource>
</RCC>