/*  This file is part of the KDE project.

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

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

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

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

    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 Lesser General Public License for more details.

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

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

*/

#include <QtGui/QPainter>

#include <gst/gst.h>

#include "common.h"

#include "message.h"

#include "mediaobject.h"

#include "qwidgetvideosink.h"

#include "widgetrenderer.h"

#include "qrgb.h"

// support old OpenGL installations (1.2)

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

#ifndef GL_TEXTURE0

# define GL_TEXTURE0    0x84C0

# define GL_TEXTURE1    0x84C1

# define GL_TEXTURE2    0x84C2

#endif

QT_BEGIN_NAMESPACE

static void frameRendered()

{

    static QString displayFps = qgetenv("PHONON_GST_FPS");

    if (displayFps.isEmpty())

        return;

    static int frames = 0;

    static QTime lastTime = QTime::currentTime();

    QTime time = QTime::currentTime();

    int delta = lastTime.msecsTo(time);

    if (delta > 2000) {

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

        lastTime = time;

        frames = 0;

    }

    ++frames;

}

namespace Phonon

{

namespace Gstreamer

{

WidgetRenderer::WidgetRenderer(VideoWidget *videoWidget)

        : AbstractRenderer(videoWidget)

        , m_width(0)

        , m_height(0)

{

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

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

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

        gst_object_sink (GST_OBJECT (m_videoSink));

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

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

        sink->renderWidget = videoWidget;

    }

    // Clear the background with black by default

    QPalette palette;

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

    m_videoWidget->setPalette(palette);

    m_videoWidget->setAutoFillBackground(true);

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

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

}

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

{

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

        return;

    m_frame = QImage(); 

    {

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

    }

    m_array = array;

    m_width = w;

    m_height = h;

    m_videoWidget->update();

}

void WidgetRenderer::handleMediaNodeEvent(const MediaNodeEvent *event)

{

    switch (event->type()) {

    case MediaNodeEvent::SourceChanged:

    {

        clearFrame();

        break;

    }

    default:

        break;

    }

}

void WidgetRenderer::clearFrame()

{

    m_frame = QImage();

    m_array = QByteArray();

    m_videoWidget->update();

}

const QImage &WidgetRenderer::currentFrame() const

{

    return m_frame;

}

void WidgetRenderer::handlePaint(QPaintEvent *event)

{

    Q_UNUSED(event);

    QPainter painter(m_videoWidget);

    m_drawFrameRect = m_videoWidget->calculateDrawFrameRect();

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

    frameRendered();

}

bool WidgetRenderer::eventFilter(QEvent * event)

{

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

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

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

        return true;

    }

    return false;

}

}

} //namespace Phonon::Gstreamer

QT_END_NAMESPACE