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Diffstat (limited to 'src/gsttools/qgstreamervideowidget.cpp')
| -rw-r--r-- | src/gsttools/qgstreamervideowidget.cpp | 352 |
1 files changed, 352 insertions, 0 deletions
diff --git a/src/gsttools/qgstreamervideowidget.cpp b/src/gsttools/qgstreamervideowidget.cpp new file mode 100644 index 000000000..9c56a06de --- /dev/null +++ b/src/gsttools/qgstreamervideowidget.cpp @@ -0,0 +1,352 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/ +** +** This file is part of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** GNU Lesser General Public License Usage +** This file may be used under the terms of the GNU Lesser General Public +** License version 2.1 as published by the Free Software Foundation and +** appearing in the file LICENSE.LGPL included in the packaging of this +** file. Please review the following information to ensure the GNU Lesser +** General Public License version 2.1 requirements will be met: +** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU General +** Public License version 3.0 as published by the Free Software Foundation +** and appearing in the file LICENSE.GPL included in the packaging of this +** file. Please review the following information to ensure the GNU General +** Public License version 3.0 requirements will be met: +** http://www.gnu.org/copyleft/gpl.html. +** +** Other Usage +** Alternatively, this file may be used in accordance with the terms and +** conditions contained in a signed written agreement between you and Nokia. +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qgstreamervideowidget_p.h" +#include <private/qgstutils_p.h> + +#include <QtCore/qcoreevent.h> +#include <QtCore/qdebug.h> +#include <QtWidgets/qapplication.h> +#include <QtGui/qpainter.h> + +#ifdef Q_WS_X11 +# include <X11/Xlib.h> +#endif +#include <gst/gst.h> +#include <gst/interfaces/xoverlay.h> +#include <gst/interfaces/propertyprobe.h> + +class QGstreamerVideoWidget : public QWidget +{ +public: + QGstreamerVideoWidget(QWidget *parent = 0) + :QWidget(parent) + { + setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding); + QPalette palette; + palette.setColor(QPalette::Background, Qt::black); + setPalette(palette); + } + + virtual ~QGstreamerVideoWidget() {} + + QSize sizeHint() const + { + return m_nativeSize; + } + + void setNativeSize( const QSize &size) + { + if (size != m_nativeSize) { + m_nativeSize = size; + if (size.isEmpty()) + setMinimumSize(0,0); + else + setMinimumSize(160,120); + + updateGeometry(); + } + } + +protected: + void paintEvent(QPaintEvent *) + { + QPainter painter(this); + painter.fillRect(rect(), palette().background()); + } + + QSize m_nativeSize; +}; + +QGstreamerVideoWidgetControl::QGstreamerVideoWidgetControl(QObject *parent) + : QVideoWidgetControl(parent) + , m_videoSink(0) + , m_widget(0) + , m_fullScreen(false) +{ +} + +QGstreamerVideoWidgetControl::~QGstreamerVideoWidgetControl() +{ + if (m_videoSink) + gst_object_unref(GST_OBJECT(m_videoSink)); + + delete m_widget; +} + +void QGstreamerVideoWidgetControl::createVideoWidget() +{ + if (m_widget) + return; + + m_widget = new QGstreamerVideoWidget; + + m_widget->installEventFilter(this); + m_windowId = m_widget->winId(); + + m_videoSink = gst_element_factory_make ("xvimagesink", NULL); + if (m_videoSink) { + // Check if the xv sink is usable + if (gst_element_set_state(m_videoSink, GST_STATE_READY) != GST_STATE_CHANGE_SUCCESS) { + gst_object_unref(GST_OBJECT(m_videoSink)); + m_videoSink = 0; + } else { + gst_element_set_state(m_videoSink, GST_STATE_NULL); + + g_object_set(G_OBJECT(m_videoSink), "force-aspect-ratio", 1, (const char*)NULL); + } + } + + if (!m_videoSink) + m_videoSink = gst_element_factory_make ("ximagesink", NULL); + + gst_object_ref (GST_OBJECT (m_videoSink)); //Take ownership + gst_object_sink (GST_OBJECT (m_videoSink)); + + +} + +GstElement *QGstreamerVideoWidgetControl::videoSink() +{ + createVideoWidget(); + return m_videoSink; +} + +bool QGstreamerVideoWidgetControl::eventFilter(QObject *object, QEvent *e) +{ + if (m_widget && object == m_widget) { + if (e->type() == QEvent::ParentChange || e->type() == QEvent::Show) { + WId newWId = m_widget->winId(); + if (newWId != m_windowId) { + m_windowId = newWId; + // Even if we have created a winId at this point, other X applications + // need to be aware of it. + QApplication::syncX(); + setOverlay(); + } + } + + if (e->type() == QEvent::Show) { + // Setting these values ensures smooth resizing since it + // will prevent the system from clearing the background + m_widget->setAttribute(Qt::WA_NoSystemBackground, true); + m_widget->setAttribute(Qt::WA_PaintOnScreen, true); + } else if (e->type() == QEvent::Resize) { + // This is a workaround for missing background repaints + // when reducing window size + windowExposed(); + } + } + + return false; +} + +bool QGstreamerVideoWidgetControl::processSyncMessage(const QGstreamerMessage &message) +{ + GstMessage* gm = message.rawMessage(); + + if (gm && (GST_MESSAGE_TYPE(gm) == GST_MESSAGE_ELEMENT) && + gst_structure_has_name(gm->structure, "prepare-xwindow-id")) { + + setOverlay(); + QMetaObject::invokeMethod(this, "updateNativeVideoSize", Qt::QueuedConnection); + return true; + } + + return false; +} + +bool QGstreamerVideoWidgetControl::processBusMessage(const QGstreamerMessage &message) +{ + GstMessage* gm = message.rawMessage(); + + if (GST_MESSAGE_TYPE(gm) == GST_MESSAGE_STATE_CHANGED && + GST_MESSAGE_SRC(gm) == GST_OBJECT_CAST(m_videoSink)) { + GstState oldState; + GstState newState; + gst_message_parse_state_changed(gm, &oldState, &newState, 0); + + if (oldState == GST_STATE_READY && newState == GST_STATE_PAUSED) + updateNativeVideoSize(); + } + + return false; +} + +void QGstreamerVideoWidgetControl::setOverlay() +{ + if (m_videoSink && GST_IS_X_OVERLAY(m_videoSink)) { + gst_x_overlay_set_xwindow_id(GST_X_OVERLAY(m_videoSink), m_windowId); + } +} + +void QGstreamerVideoWidgetControl::updateNativeVideoSize() +{ + if (m_videoSink) { + //find video native size to update video widget size hint + GstPad *pad = gst_element_get_static_pad(m_videoSink,"sink"); + GstCaps *caps = gst_pad_get_negotiated_caps(pad); + + if (caps) { + m_widget->setNativeSize(QGstUtils::capsCorrectedResolution(caps)); + gst_caps_unref(caps); + } + } else { + if (m_widget) + m_widget->setNativeSize(QSize()); + } +} + + +void QGstreamerVideoWidgetControl::windowExposed() +{ + if (m_videoSink && GST_IS_X_OVERLAY(m_videoSink)) + gst_x_overlay_expose(GST_X_OVERLAY(m_videoSink)); +} + +QWidget *QGstreamerVideoWidgetControl::videoWidget() +{ + createVideoWidget(); + return m_widget; +} + +Qt::AspectRatioMode QGstreamerVideoWidgetControl::aspectRatioMode() const +{ + return m_aspectRatioMode; +} + +void QGstreamerVideoWidgetControl::setAspectRatioMode(Qt::AspectRatioMode mode) +{ + if (m_videoSink) { + g_object_set(G_OBJECT(m_videoSink), + "force-aspect-ratio", + (mode == Qt::KeepAspectRatio), + (const char*)NULL); + } + + m_aspectRatioMode = mode; +} + +bool QGstreamerVideoWidgetControl::isFullScreen() const +{ + return m_fullScreen; +} + +void QGstreamerVideoWidgetControl::setFullScreen(bool fullScreen) +{ + emit fullScreenChanged(m_fullScreen = fullScreen); +} + +int QGstreamerVideoWidgetControl::brightness() const +{ + int brightness = 0; + + if (m_videoSink && g_object_class_find_property(G_OBJECT_GET_CLASS(m_videoSink), "brightness")) + g_object_get(G_OBJECT(m_videoSink), "brightness", &brightness, NULL); + + return brightness / 10; +} + +void QGstreamerVideoWidgetControl::setBrightness(int brightness) +{ + if (m_videoSink && g_object_class_find_property(G_OBJECT_GET_CLASS(m_videoSink), "brightness")) { + g_object_set(G_OBJECT(m_videoSink), "brightness", brightness * 10, NULL); + + emit brightnessChanged(brightness); + } +} + +int QGstreamerVideoWidgetControl::contrast() const +{ + int contrast = 0; + + if (m_videoSink && g_object_class_find_property(G_OBJECT_GET_CLASS(m_videoSink), "contrast")) + g_object_get(G_OBJECT(m_videoSink), "contrast", &contrast, NULL); + + return contrast / 10; +} + +void QGstreamerVideoWidgetControl::setContrast(int contrast) +{ + if (m_videoSink && g_object_class_find_property(G_OBJECT_GET_CLASS(m_videoSink), "contrast")) { + g_object_set(G_OBJECT(m_videoSink), "contrast", contrast * 10, NULL); + + emit contrastChanged(contrast); + } +} + +int QGstreamerVideoWidgetControl::hue() const +{ + int hue = 0; + + if (m_videoSink && g_object_class_find_property(G_OBJECT_GET_CLASS(m_videoSink), "hue")) + g_object_get(G_OBJECT(m_videoSink), "hue", &hue, NULL); + + return hue / 10; +} + +void QGstreamerVideoWidgetControl::setHue(int hue) +{ + if (m_videoSink && g_object_class_find_property(G_OBJECT_GET_CLASS(m_videoSink), "hue")) { + g_object_set(G_OBJECT(m_videoSink), "hue", hue * 10, NULL); + + emit hueChanged(hue); + } +} + +int QGstreamerVideoWidgetControl::saturation() const +{ + int saturation = 0; + + if (m_videoSink && g_object_class_find_property(G_OBJECT_GET_CLASS(m_videoSink), "saturation")) + g_object_get(G_OBJECT(m_videoSink), "saturation", &saturation, NULL); + + return saturation / 10; +} + +void QGstreamerVideoWidgetControl::setSaturation(int saturation) +{ + if (m_videoSink && g_object_class_find_property(G_OBJECT_GET_CLASS(m_videoSink), "saturation")) { + g_object_set(G_OBJECT(m_videoSink), "saturation", saturation * 10, NULL); + + emit saturationChanged(saturation); + } +} |