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#include "qgstreamervideooverlay.h"

#include "qvideosurfacegstsink.h"

#include <QtMultimedia/qvideosurfaceformat.h>

#include "qx11videosurface.h"

QGstreamerVideoOverlay::QGstreamerVideoOverlay(QObject *parent)

    : QVideoWindowControl(parent)

    , m_surface(new QX11VideoSurface)

    , m_videoSink(reinterpret_cast<GstElement*>(QVideoSurfaceGstSink::createSink(m_surface)))

    , m_aspectRatioMode(Qt::KeepAspectRatio)

    , m_fullScreen(false)

{

    if (m_videoSink) {

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

        gst_object_sink(GST_OBJECT(m_videoSink));

    }

    connect(m_surface, SIGNAL(surfaceFormatChanged(QVideoSurfaceFormat)),

            this, SLOT(surfaceFormatChanged()));

}

QGstreamerVideoOverlay::~QGstreamerVideoOverlay()

{

    if (m_videoSink)

        gst_object_unref(GST_OBJECT(m_videoSink));

    delete m_surface;

}

WId QGstreamerVideoOverlay::winId() const

{

    return m_surface->winId();

}

void QGstreamerVideoOverlay::setWinId(WId id)

{

    m_surface->setWinId(id);

}

QRect QGstreamerVideoOverlay::displayRect() const

{

    return m_displayRect;

}

void QGstreamerVideoOverlay::setDisplayRect(const QRect &rect)

{

    m_displayRect = rect;

    setScaledDisplayRect();

}

Qt::AspectRatioMode QGstreamerVideoOverlay::aspectRatioMode() const

{

    return m_aspectRatioMode;

}

void QGstreamerVideoOverlay::setAspectRatioMode(Qt::AspectRatioMode mode)

{

    m_aspectRatioMode = mode;

    setScaledDisplayRect();

}

void QGstreamerVideoOverlay::repaint()

{

}

int QGstreamerVideoOverlay::brightness() const

{

    return m_surface->brightness();

}

void QGstreamerVideoOverlay::setBrightness(int brightness)

{

    m_surface->setBrightness(brightness);

    emit brightnessChanged(m_surface->brightness());

}

int QGstreamerVideoOverlay::contrast() const

{

    return m_surface->contrast();

}

void QGstreamerVideoOverlay::setContrast(int contrast)

{

    m_surface->setContrast(contrast);

    emit contrastChanged(m_surface->contrast());

}

int QGstreamerVideoOverlay::hue() const

{

    return m_surface->hue();

}

void QGstreamerVideoOverlay::setHue(int hue)

{

    m_surface->setHue(hue);

    emit hueChanged(m_surface->hue());

}

int QGstreamerVideoOverlay::saturation() const

{

    return m_surface->saturation();

}

void QGstreamerVideoOverlay::setSaturation(int saturation)

{

    m_surface->setSaturation(saturation);

    emit saturationChanged(m_surface->saturation());

}

bool QGstreamerVideoOverlay::isFullScreen() const

{

    return m_fullScreen;

}

void QGstreamerVideoOverlay::setFullScreen(bool fullScreen)

{

    emit fullScreenChanged(m_fullScreen = fullScreen);

}

QSize QGstreamerVideoOverlay::nativeSize() const

{

    return m_surface->surfaceFormat().sizeHint();

}

QAbstractVideoSurface *QGstreamerVideoOverlay::surface() const

{

    return m_surface;

}

GstElement *QGstreamerVideoOverlay::videoSink()

{

    return m_videoSink;

}

void QGstreamerVideoOverlay::surfaceFormatChanged()

{

    setScaledDisplayRect();

    emit nativeSizeChanged();

}

void QGstreamerVideoOverlay::setScaledDisplayRect()

{

    QRect formatViewport = m_surface->surfaceFormat().viewport();

    switch (m_aspectRatioMode) {

    case Qt::KeepAspectRatio:

        {

            QSize size = formatViewport.size();

            size.scale(m_displayRect.size(), Qt::KeepAspectRatio);

            QRect rect(QPoint(0, 0), size);

            rect.moveCenter(m_displayRect.center());

            m_surface->setDisplayRect(rect);

            m_surface->setViewport(formatViewport);

        }

        break;

    case Qt::IgnoreAspectRatio:

        m_surface->setDisplayRect(m_displayRect);

        m_surface->setViewport(formatViewport);

        break;

    case Qt::KeepAspectRatioByExpanding:

        {

            QSize size = m_displayRect.size();

            size.scale(formatViewport.size(), Qt::KeepAspectRatio);

            QRect viewport(QPoint(0, 0), size);

            viewport.moveCenter(formatViewport.center());

            m_surface->setDisplayRect(m_displayRect);

            m_surface->setViewport(viewport);

        }

        break;

    };

}