1 /*  This file is part of the KDE project.

     2 

     3     Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

     4 

     5     This library is free software: you can redistribute it and/or modify

     6     it under the terms of the GNU Lesser General Public License as published by

     7     the Free Software Foundation, either version 2.1 or 3 of the License.

     8 

     9     This library is distributed in the hope that it will be useful,

    10     but WITHOUT ANY WARRANTY; without even the implied warranty of

    11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    12     GNU Lesser General Public License for more details.

    13 

    14     You should have received a copy of the GNU Lesser General Public License

    15     along with this library.  If not, see <http://www.gnu.org/licenses/>.

    16 */

    17 

    18 #include <QtGui/QPainter>

    19 #include <gst/gst.h>

    20 #include "common.h"

    21 #include "message.h"

    22 #include "mediaobject.h"

    23 #include "qwidgetvideosink.h"

    24 #include "widgetrenderer.h"

    25 #include "qrgb.h"

    26 

    27 // support old OpenGL installations (1.2)

    28 // assume that if TEXTURE0 isn't defined, none are

    29 #ifndef GL_TEXTURE0

    30 # define GL_TEXTURE0    0x84C0

    31 # define GL_TEXTURE1    0x84C1

    32 # define GL_TEXTURE2    0x84C2

    33 #endif

    34 

    35 QT_BEGIN_NAMESPACE

    36 

    37 static void frameRendered()

    38 {

    39     static QString displayFps = qgetenv("PHONON_GST_FPS");

    40     if (displayFps.isEmpty())

    41         return;

    42 

    43     static int frames = 0;

    44     static QTime lastTime = QTime::currentTime();

    45     QTime time = QTime::currentTime();

    46 

    47     int delta = lastTime.msecsTo(time);

    48     if (delta > 2000) {

    49         printf("FPS: %f\n", 1000.0 * frames / qreal(delta));

    50         lastTime = time;

    51         frames = 0;

    52     }

    53 

    54     ++frames;

    55 }

    56 

    57 namespace Phonon

    58 {

    59 namespace Gstreamer

    60 {

    61 

    62 WidgetRenderer::WidgetRenderer(VideoWidget *videoWidget)

    63         : AbstractRenderer(videoWidget)

    64         , m_width(0)

    65         , m_height(0)

    66 {

    67     videoWidget->backend()->logMessage("Creating QWidget renderer");

    68     if ((m_videoSink = GST_ELEMENT(g_object_new(get_type_RGB(), NULL)))) {

    69         gst_object_ref (GST_OBJECT (m_videoSink)); //Take ownership

    70         gst_object_sink (GST_OBJECT (m_videoSink));

    71         

    72         QWidgetVideoSinkBase*  sink = reinterpret_cast<QWidgetVideoSinkBase*>(m_videoSink);

    73         // Let the videosink know which widget to direct frame updates to

    74         sink->renderWidget = videoWidget;

    75     }

    76 

    77     // Clear the background with black by default

    78     QPalette palette;

    79     palette.setColor(QPalette::Background, Qt::black);

    80     m_videoWidget->setPalette(palette);

    81     m_videoWidget->setAutoFillBackground(true);

    82     m_videoWidget->setAttribute(Qt::WA_NoSystemBackground, false);

    83     m_videoWidget->setAttribute(Qt::WA_PaintOnScreen, false);

    84 }

    85 

    86 void WidgetRenderer::setNextFrame(const QByteArray &array, int w, int h)

    87 {

    88     if (m_videoWidget->root()->state() == Phonon::LoadingState)

    89         return;

    90 

    91     m_frame = QImage(); 

    92     {

    93         m_frame = QImage((uchar *)array.constData(), w, h, QImage::Format_RGB32);

    94     }

    95 

    96     m_array = array;

    97     m_width = w;

    98     m_height = h;

    99 

   100     m_videoWidget->update();

   101 }

   102 

   103 void WidgetRenderer::handleMediaNodeEvent(const MediaNodeEvent *event)

   104 {

   105     switch (event->type()) {

   106     case MediaNodeEvent::SourceChanged:

   107     {

   108         clearFrame();

   109         break;

   110     }

   111     default:

   112         break;

   113     }

   114 }

   115 

   116 void WidgetRenderer::clearFrame()

   117 {

   118     m_frame = QImage();

   119     m_array = QByteArray();

   120     m_videoWidget->update();

   121 }

   122 

   123 const QImage &WidgetRenderer::currentFrame() const

   124 {

   125     return m_frame;

   126 }

   127 

   128 void WidgetRenderer::handlePaint(QPaintEvent *event)

   129 {

   130     Q_UNUSED(event);

   131     QPainter painter(m_videoWidget);

   132     m_drawFrameRect = m_videoWidget->calculateDrawFrameRect();

   133     painter.drawImage(drawFrameRect(), currentFrame());

   134     frameRendered();

   135 }

   136 

   137 bool WidgetRenderer::eventFilter(QEvent * event)

   138 {

   139     if (event->type() == QEvent::User) {

   140         NewFrameEvent *frameEvent= static_cast <NewFrameEvent *>(event);

   141         setNextFrame(frameEvent->frame, frameEvent->width, frameEvent->height);

   142         return true;

   143     }

   144     return false;

   145 }

   146 

   147 }

   148 } //namespace Phonon::Gstreamer

   149 

   150 QT_END_NAMESPACE