a3f82a8995
We need a native X window handle to be able to use xvimagesink. If Qt doesn't use the Xcb platform plugin, don't try to use that element. This patch makes QVideoWidget usable when the system doesn't run X11 but xvimagesink is installed anyway. Widget and window controls become invalid and the plugin therefore falls back to the renderer control. Change-Id: I6efd410508f35b06f00f6e4e5149c97cbd280d0d Task-number: QTBUG-46169 Reviewed-by: Laszlo Agocs <laszlo.agocs@theqtcompany.com>
358 lines
10 KiB
C++
358 lines
10 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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**
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** This file is part of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL21$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see http://www.qt.io/terms-conditions. For further
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** information use the contact form at http://www.qt.io/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 or version 3 as published by the Free
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** Software Foundation and appearing in the file LICENSE.LGPLv21 and
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** LICENSE.LGPLv3 included in the packaging of this file. Please review the
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** following information to ensure the GNU Lesser General Public License
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** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** As a special exception, The Qt Company gives you certain additional
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** rights. These rights are described in The Qt Company LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "qgstreamervideowidget_p.h"
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#include <private/qgstutils_p.h>
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#include <QtCore/qcoreevent.h>
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#include <QtCore/qdebug.h>
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#include <QtWidgets/qapplication.h>
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#include <QtGui/qpainter.h>
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#include <gst/gst.h>
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#if !GST_CHECK_VERSION(1,0,0)
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#include <gst/interfaces/xoverlay.h>
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#include <gst/interfaces/propertyprobe.h>
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#else
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#include <gst/video/videooverlay.h>
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#endif
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QT_BEGIN_NAMESPACE
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class QGstreamerVideoWidget : public QWidget
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{
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public:
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QGstreamerVideoWidget(QWidget *parent = 0)
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:QWidget(parent)
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{
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setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
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QPalette palette;
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palette.setColor(QPalette::Background, Qt::black);
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setPalette(palette);
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}
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virtual ~QGstreamerVideoWidget() {}
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QSize sizeHint() const
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{
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return m_nativeSize;
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}
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void setNativeSize( const QSize &size)
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{
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if (size != m_nativeSize) {
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m_nativeSize = size;
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if (size.isEmpty())
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setMinimumSize(0,0);
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else
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setMinimumSize(160,120);
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updateGeometry();
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}
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}
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protected:
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void paintEvent(QPaintEvent *)
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{
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QPainter painter(this);
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painter.fillRect(rect(), palette().background());
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}
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QSize m_nativeSize;
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};
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QGstreamerVideoWidgetControl::QGstreamerVideoWidgetControl(QObject *parent)
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: QVideoWidgetControl(parent)
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, m_videoSink(0)
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, m_widget(0)
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, m_fullScreen(false)
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{
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// The QWidget needs to have a native X window handle to be able to use xvimagesink.
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// Bail out if Qt is not using xcb (the control will then be ignored by the plugin)
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if (QGuiApplication::platformName().compare(QLatin1String("xcb"), Qt::CaseInsensitive) == 0)
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m_videoSink = gst_element_factory_make ("xvimagesink", NULL);
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if (m_videoSink) {
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// Check if the xv sink is usable
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if (gst_element_set_state(m_videoSink, GST_STATE_READY) != GST_STATE_CHANGE_SUCCESS) {
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gst_object_unref(GST_OBJECT(m_videoSink));
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m_videoSink = 0;
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} else {
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gst_element_set_state(m_videoSink, GST_STATE_NULL);
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g_object_set(G_OBJECT(m_videoSink), "force-aspect-ratio", 1, (const char*)NULL);
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qt_gst_object_ref_sink(GST_OBJECT (m_videoSink)); //Take ownership
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}
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}
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}
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QGstreamerVideoWidgetControl::~QGstreamerVideoWidgetControl()
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{
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if (m_videoSink)
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gst_object_unref(GST_OBJECT(m_videoSink));
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delete m_widget;
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}
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void QGstreamerVideoWidgetControl::createVideoWidget()
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{
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if (!m_videoSink || m_widget)
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return;
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m_widget = new QGstreamerVideoWidget;
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m_widget->installEventFilter(this);
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m_windowId = m_widget->winId();
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}
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GstElement *QGstreamerVideoWidgetControl::videoSink()
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{
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return m_videoSink;
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}
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bool QGstreamerVideoWidgetControl::eventFilter(QObject *object, QEvent *e)
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{
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if (m_widget && object == m_widget) {
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if (e->type() == QEvent::ParentChange || e->type() == QEvent::Show) {
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WId newWId = m_widget->winId();
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if (newWId != m_windowId) {
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m_windowId = newWId;
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setOverlay();
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}
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}
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if (e->type() == QEvent::Show) {
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// Setting these values ensures smooth resizing since it
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// will prevent the system from clearing the background
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m_widget->setAttribute(Qt::WA_NoSystemBackground, true);
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} else if (e->type() == QEvent::Resize) {
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// This is a workaround for missing background repaints
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// when reducing window size
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windowExposed();
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}
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}
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return false;
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}
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bool QGstreamerVideoWidgetControl::processSyncMessage(const QGstreamerMessage &message)
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{
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GstMessage* gm = message.rawMessage();
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#if !GST_CHECK_VERSION(1,0,0)
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if (gm && (GST_MESSAGE_TYPE(gm) == GST_MESSAGE_ELEMENT) &&
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gst_structure_has_name(gm->structure, "prepare-xwindow-id")) {
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#else
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if (gm && (GST_MESSAGE_TYPE(gm) == GST_MESSAGE_ELEMENT) &&
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gst_structure_has_name(gst_message_get_structure(gm), "prepare-window-handle")) {
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#endif
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setOverlay();
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QMetaObject::invokeMethod(this, "updateNativeVideoSize", Qt::QueuedConnection);
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return true;
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}
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return false;
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}
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bool QGstreamerVideoWidgetControl::processBusMessage(const QGstreamerMessage &message)
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{
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GstMessage* gm = message.rawMessage();
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if (GST_MESSAGE_TYPE(gm) == GST_MESSAGE_STATE_CHANGED &&
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GST_MESSAGE_SRC(gm) == GST_OBJECT_CAST(m_videoSink)) {
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GstState oldState;
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GstState newState;
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gst_message_parse_state_changed(gm, &oldState, &newState, 0);
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if (oldState == GST_STATE_READY && newState == GST_STATE_PAUSED)
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updateNativeVideoSize();
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}
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return false;
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}
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void QGstreamerVideoWidgetControl::setOverlay()
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{
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#if !GST_CHECK_VERSION(1,0,0)
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if (m_videoSink && GST_IS_X_OVERLAY(m_videoSink)) {
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gst_x_overlay_set_xwindow_id(GST_X_OVERLAY(m_videoSink), m_windowId);
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}
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#else
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if (m_videoSink && GST_IS_VIDEO_OVERLAY(m_videoSink)) {
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gst_video_overlay_set_window_handle(GST_VIDEO_OVERLAY(m_videoSink), m_windowId);
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}
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#endif
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}
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void QGstreamerVideoWidgetControl::updateNativeVideoSize()
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{
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if (m_videoSink) {
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//find video native size to update video widget size hint
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GstPad *pad = gst_element_get_static_pad(m_videoSink, "sink");
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GstCaps *caps = qt_gst_pad_get_current_caps(pad);
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gst_object_unref(GST_OBJECT(pad));
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if (caps) {
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m_widget->setNativeSize(QGstUtils::capsCorrectedResolution(caps));
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gst_caps_unref(caps);
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}
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} else {
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if (m_widget)
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m_widget->setNativeSize(QSize());
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}
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}
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void QGstreamerVideoWidgetControl::windowExposed()
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{
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#if !GST_CHECK_VERSION(1,0,0)
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if (m_videoSink && GST_IS_X_OVERLAY(m_videoSink))
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gst_x_overlay_expose(GST_X_OVERLAY(m_videoSink));
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#else
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if (m_videoSink && GST_IS_VIDEO_OVERLAY(m_videoSink))
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gst_video_overlay_expose(GST_VIDEO_OVERLAY(m_videoSink));
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#endif
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}
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QWidget *QGstreamerVideoWidgetControl::videoWidget()
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{
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createVideoWidget();
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return m_widget;
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}
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Qt::AspectRatioMode QGstreamerVideoWidgetControl::aspectRatioMode() const
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{
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return m_aspectRatioMode;
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}
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void QGstreamerVideoWidgetControl::setAspectRatioMode(Qt::AspectRatioMode mode)
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{
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if (m_videoSink) {
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g_object_set(G_OBJECT(m_videoSink),
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"force-aspect-ratio",
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(mode == Qt::KeepAspectRatio),
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(const char*)NULL);
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}
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m_aspectRatioMode = mode;
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}
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bool QGstreamerVideoWidgetControl::isFullScreen() const
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{
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return m_fullScreen;
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}
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void QGstreamerVideoWidgetControl::setFullScreen(bool fullScreen)
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{
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emit fullScreenChanged(m_fullScreen = fullScreen);
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}
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int QGstreamerVideoWidgetControl::brightness() const
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{
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int brightness = 0;
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if (m_videoSink && g_object_class_find_property(G_OBJECT_GET_CLASS(m_videoSink), "brightness"))
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g_object_get(G_OBJECT(m_videoSink), "brightness", &brightness, NULL);
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return brightness / 10;
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}
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void QGstreamerVideoWidgetControl::setBrightness(int brightness)
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{
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if (m_videoSink && g_object_class_find_property(G_OBJECT_GET_CLASS(m_videoSink), "brightness")) {
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g_object_set(G_OBJECT(m_videoSink), "brightness", brightness * 10, NULL);
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emit brightnessChanged(brightness);
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}
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}
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int QGstreamerVideoWidgetControl::contrast() const
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{
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int contrast = 0;
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if (m_videoSink && g_object_class_find_property(G_OBJECT_GET_CLASS(m_videoSink), "contrast"))
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g_object_get(G_OBJECT(m_videoSink), "contrast", &contrast, NULL);
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return contrast / 10;
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}
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void QGstreamerVideoWidgetControl::setContrast(int contrast)
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{
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if (m_videoSink && g_object_class_find_property(G_OBJECT_GET_CLASS(m_videoSink), "contrast")) {
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g_object_set(G_OBJECT(m_videoSink), "contrast", contrast * 10, NULL);
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emit contrastChanged(contrast);
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}
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}
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int QGstreamerVideoWidgetControl::hue() const
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{
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int hue = 0;
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if (m_videoSink && g_object_class_find_property(G_OBJECT_GET_CLASS(m_videoSink), "hue"))
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g_object_get(G_OBJECT(m_videoSink), "hue", &hue, NULL);
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return hue / 10;
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}
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void QGstreamerVideoWidgetControl::setHue(int hue)
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{
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if (m_videoSink && g_object_class_find_property(G_OBJECT_GET_CLASS(m_videoSink), "hue")) {
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g_object_set(G_OBJECT(m_videoSink), "hue", hue * 10, NULL);
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emit hueChanged(hue);
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}
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}
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int QGstreamerVideoWidgetControl::saturation() const
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{
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int saturation = 0;
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if (m_videoSink && g_object_class_find_property(G_OBJECT_GET_CLASS(m_videoSink), "saturation"))
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g_object_get(G_OBJECT(m_videoSink), "saturation", &saturation, NULL);
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return saturation / 10;
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}
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void QGstreamerVideoWidgetControl::setSaturation(int saturation)
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{
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if (m_videoSink && g_object_class_find_property(G_OBJECT_GET_CLASS(m_videoSink), "saturation")) {
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g_object_set(G_OBJECT(m_videoSink), "saturation", saturation * 10, NULL);
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emit saturationChanged(saturation);
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}
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}
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QT_END_NAMESPACE
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