path: root/src/multimedia/base/qvideowidget.cpp

/****************************************************************************
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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
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** Contact: Nokia Corporation (qt-info@nokia.com)
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** This file is part of the QtMultimedia module of the Qt Toolkit.
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** this package.
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#include "qvideowidget_p.h"

#include <QtMultimedia/qmediaobject.h>
#include <QtMultimedia/qmediaservice.h>
#include <QtMultimedia/qvideooutputcontrol.h>
#include <QtMultimedia/qvideowindowcontrol.h>
#include <QtMultimedia/qvideowidgetcontrol.h>

#include "qpaintervideosurface_p.h"
#include <QtMultimedia/qvideorenderercontrol.h>
#include <QtMultimedia/qvideosurfaceformat.h>
#include <qpainter.h>

#include <qapplication.h>
#include <qevent.h>
#include <qdialog.h>
#include <qboxlayout.h>
#include <qnamespace.h>


QT_BEGIN_NAMESPACE

QVideoWidgetControlBackend::QVideoWidgetControlBackend(
        QVideoWidgetControl *control, QWidget *widget)
    : m_widgetControl(control)
{
    connect(control, SIGNAL(brightnessChanged(int)), widget, SLOT(_q_brightnessChanged(int)));
    connect(control, SIGNAL(contrastChanged(int)), widget, SLOT(_q_contrastChanged(int)));
    connect(control, SIGNAL(hueChanged(int)), widget, SLOT(_q_hueChanged(int)));
    connect(control, SIGNAL(saturationChanged(int)), widget, SLOT(_q_saturationChanged(int)));
    connect(control, SIGNAL(fullScreenChanged(bool)), widget, SLOT(_q_fullScreenChanged(bool)));

    QBoxLayout *layout = new QVBoxLayout;
    layout->setMargin(0);
    layout->setSpacing(0);
    layout->addWidget(control->videoWidget());

    widget->setLayout(layout);
}

void QVideoWidgetControlBackend::setBrightness(int brightness)
{
    m_widgetControl->setBrightness(brightness);
}

void QVideoWidgetControlBackend::setContrast(int contrast)
{
    m_widgetControl->setContrast(contrast);
}

void QVideoWidgetControlBackend::setHue(int hue)
{
    m_widgetControl->setHue(hue);
}

void QVideoWidgetControlBackend::setSaturation(int saturation)
{
    m_widgetControl->setSaturation(saturation);
}

void QVideoWidgetControlBackend::setFullScreen(bool fullScreen)
{
    m_widgetControl->setFullScreen(fullScreen);
}


QVideoWidget::AspectRatioMode QVideoWidgetControlBackend::aspectRatioMode() const
{
    return m_widgetControl->aspectRatioMode();
}

void QVideoWidgetControlBackend::setAspectRatioMode(QVideoWidget::AspectRatioMode mode)
{
    m_widgetControl->setAspectRatioMode(mode);
}

QRendererVideoWidgetBackend::QRendererVideoWidgetBackend(
        QVideoRendererControl *control, QWidget *widget)
    : m_rendererControl(control)
    , m_widget(widget)
    , m_surface(new QPainterVideoSurface)
    , m_aspectRatioMode(QVideoWidget::KeepAspectRatio)
    , m_updatePaintDevice(true)
{
    connect(this, SIGNAL(brightnessChanged(int)), m_widget, SLOT(_q_brightnessChanged(int)));
    connect(this, SIGNAL(contrastChanged(int)), m_widget, SLOT(_q_contrastChanged(int)));
    connect(this, SIGNAL(hueChanged(int)), m_widget, SLOT(_q_hueChanged(int)));
    connect(this, SIGNAL(saturationChanged(int)), m_widget, SLOT(_q_saturationChanged(int)));
    connect(m_surface, SIGNAL(frameChanged()), m_widget, SLOT(update()));
    connect(m_surface, SIGNAL(surfaceFormatChanged(QVideoSurfaceFormat)),
            m_widget, SLOT(_q_dimensionsChanged()));

    m_rendererControl->setSurface(m_surface);
}

QRendererVideoWidgetBackend::~QRendererVideoWidgetBackend()
{
    delete m_surface;
}

void QRendererVideoWidgetBackend::clearSurface()
{
    m_rendererControl->setSurface(0);
}

void QRendererVideoWidgetBackend::setBrightness(int brightness)
{
    m_surface->setBrightness(brightness);

    emit brightnessChanged(brightness);
}

void QRendererVideoWidgetBackend::setContrast(int contrast)
{
    m_surface->setContrast(contrast);

    emit contrastChanged(contrast);
}

void QRendererVideoWidgetBackend::setHue(int hue)
{
    m_surface->setHue(hue);

    emit hueChanged(hue);
}

void QRendererVideoWidgetBackend::setSaturation(int saturation)
{
    m_surface->setSaturation(saturation);

    emit saturationChanged(saturation);
}

QVideoWidget::AspectRatioMode QRendererVideoWidgetBackend::aspectRatioMode() const
{
    return m_aspectRatioMode;
}

void QRendererVideoWidgetBackend::setAspectRatioMode(QVideoWidget::AspectRatioMode mode)
{
    m_aspectRatioMode = mode;

    m_widget->updateGeometry();
}

void QRendererVideoWidgetBackend::setFullScreen(bool)
{
}

QSize QRendererVideoWidgetBackend::sizeHint() const
{
    return m_surface->surfaceFormat().sizeHint();
}

void QRendererVideoWidgetBackend::showEvent()
{
}

void QRendererVideoWidgetBackend::hideEvent(QHideEvent *)
{
#if !defined(QT_NO_OPENGL) && !defined(QT_OPENGL_ES_1_CL) && !defined(QT_OPENGL_ES_1)
    m_updatePaintDevice = true;
    m_surface->setGLContext(0);
#endif
}

void QRendererVideoWidgetBackend::resizeEvent(QResizeEvent *)
{
}

void QRendererVideoWidgetBackend::moveEvent(QMoveEvent *)
{
}

void QRendererVideoWidgetBackend::paintEvent(QPaintEvent *event)
{
    QPainter painter(m_widget);

    if (m_surface->isActive()) {
        m_surface->paint(&painter, displayRect());

        m_surface->setReady(true);
    } else {
        painter.fillRect(event->rect(), m_widget->palette().background());

 #if !defined(QT_NO_OPENGL) && !defined(QT_OPENGL_ES_1_CL) && !defined(QT_OPENGL_ES_1)
        if (m_updatePaintDevice && (painter.paintEngine()->type() == QPaintEngine::OpenGL
                || painter.paintEngine()->type() == QPaintEngine::OpenGL2)) {
            m_updatePaintDevice = false;

            m_surface->setGLContext(const_cast<QGLContext *>(QGLContext::currentContext()));
            if (m_surface->supportedShaderTypes() & QPainterVideoSurface::GlslShader) {
                m_surface->setShaderType(QPainterVideoSurface::GlslShader);
            } else {
                m_surface->setShaderType(QPainterVideoSurface::FragmentProgramShader);
            }
        }
#endif
    }
}

QRect QRendererVideoWidgetBackend::displayRect() const
{
    QRect displayRect = m_widget->rect();

    if (m_aspectRatioMode != QVideoWidget::IgnoreAspectRatio) {
        QVideoSurfaceFormat format = m_surface->surfaceFormat();

        QSize aspectRatio = format.pixelAspectRatio();

        QSize size = format.viewport().size();
        size.rwidth() *= aspectRatio.width();
        size.rheight() *= aspectRatio.height();
        size.scale(displayRect.size(), Qt::KeepAspectRatio);

        QPoint center = displayRect.center();

        displayRect = QRect(QPoint(0, 0), size);
        displayRect.moveCenter(center);
    }

    return displayRect;
}

QWindowVideoWidgetBackend::QWindowVideoWidgetBackend(QVideoWindowControl *control, QWidget *widget)
    : m_windowControl(control)
    , m_widget(widget)
    , m_aspectRatioMode(QVideoWidget::KeepAspectRatio)
{
    connect(control, SIGNAL(brightnessChanged(int)), m_widget, SLOT(_q_brightnessChanged(int)));
    connect(control, SIGNAL(contrastChanged(int)), m_widget, SLOT(_q_contrastChanged(int)));
    connect(control, SIGNAL(hueChanged(int)), m_widget, SLOT(_q_hueChanged(int)));
    connect(control, SIGNAL(saturationChanged(int)), m_widget, SLOT(_q_saturationChanged(int)));
    connect(control, SIGNAL(fullScreenChanged(bool)), m_widget, SLOT(_q_fullScreenChanged(bool)));
    connect(control, SIGNAL(nativeSizeChanged()), m_widget, SLOT(_q_dimensionsChanged()));
}

QWindowVideoWidgetBackend::~QWindowVideoWidgetBackend()
{
}

void QWindowVideoWidgetBackend::setBrightness(int brightness)
{
    m_windowControl->setBrightness(brightness);
}

void QWindowVideoWidgetBackend::setContrast(int contrast)
{
    m_windowControl->setContrast(contrast);
}

void QWindowVideoWidgetBackend::setHue(int hue)
{
    m_windowControl->setHue(hue);
}

void QWindowVideoWidgetBackend::setSaturation(int saturation)
{
    m_windowControl->setSaturation(saturation);
}

void QWindowVideoWidgetBackend::setFullScreen(bool fullScreen)
{
    m_windowControl->setFullScreen(fullScreen);
}

QVideoWidget::AspectRatioMode QWindowVideoWidgetBackend::aspectRatioMode() const
{
    return m_windowControl->aspectRatioMode();
}

void QWindowVideoWidgetBackend::setAspectRatioMode(QVideoWidget::AspectRatioMode mode)
{
    m_windowControl->setAspectRatioMode(mode);
}

QSize QWindowVideoWidgetBackend::sizeHint() const
{
    return m_windowControl->nativeSize();
}

void QWindowVideoWidgetBackend::showEvent()
{
    m_windowControl->setWinId(m_widget->winId());

    m_windowControl->setDisplayRect(m_widget->rect());
}

void QWindowVideoWidgetBackend::hideEvent(QHideEvent *)
{
}

void QWindowVideoWidgetBackend::moveEvent(QMoveEvent *)
{
    m_windowControl->setDisplayRect(m_widget->rect());
}

void QWindowVideoWidgetBackend::resizeEvent(QResizeEvent *)
{
    m_windowControl->setDisplayRect(m_widget->rect());
}

void QWindowVideoWidgetBackend::paintEvent(QPaintEvent *event)
{
    m_windowControl->repaint();

    event->accept();
}

void QVideoWidgetPrivate::setCurrentControl(QVideoWidgetControlInterface *control)
{
    if (currentControl != control) {
        currentControl = control;

        currentControl->setBrightness(brightness);
        currentControl->setContrast(contrast);
        currentControl->setHue(hue);
        currentControl->setSaturation(saturation);
        currentControl->setAspectRatioMode(aspectRatioMode);
    }
}

void QVideoWidgetPrivate::show()
{
    if (outputControl) {
        if (widgetBackend != 0) {
            setCurrentControl(widgetBackend);
            outputControl->setOutput(QVideoOutputControl::WidgetOutput);
        } else if (windowBackend != 0 && (q_func()->window() == 0
                || !q_func()->window()->testAttribute(Qt::WA_DontShowOnScreen))) {
            windowBackend->showEvent();
            currentBackend = windowBackend;
            setCurrentControl(windowBackend);
            outputControl->setOutput(QVideoOutputControl::WindowOutput);
        } else if (rendererBackend != 0) {
            rendererBackend->showEvent();
            currentBackend = rendererBackend;
            setCurrentControl(rendererBackend);
            outputControl->setOutput(QVideoOutputControl::RendererOutput);
        } else {
            outputControl->setOutput(QVideoOutputControl::NoOutput);
        }
    }
}

void QVideoWidgetPrivate::clearService()
{
    if (service) {
        QObject::disconnect(service, SIGNAL(destroyed()), q_func(), SLOT(_q_serviceDestroyed()));

        if (outputControl)
            outputControl->setOutput(QVideoOutputControl::NoOutput);

        if (widgetBackend) {
            QLayout *layout = q_func()->layout();

            for (QLayoutItem *item = layout->takeAt(0); item; item = layout->takeAt(0)) {
                item->widget()->setParent(0);
                delete item;
            }
            delete layout;

            delete widgetBackend;
            widgetBackend = 0;
        }

        delete windowBackend;
        windowBackend = 0;

        if (rendererBackend) {
            rendererBackend->clearSurface();

            delete rendererBackend;
            rendererBackend = 0;
        }

        currentBackend = 0;
        currentControl = 0;
        outputControl = 0;
        service = 0;
    }
}

void QVideoWidgetPrivate::_q_serviceDestroyed()
{
    if (widgetBackend) {
        delete q_func()->layout();

        delete widgetBackend;
        widgetBackend = 0;
    }

    delete windowBackend;
    windowBackend = 0;

    delete rendererBackend;
    rendererBackend = 0;

    currentControl = 0;
    currentBackend = 0;
    outputControl = 0;
    service = 0;
}

void QVideoWidgetPrivate::_q_mediaObjectDestroyed()
{
    mediaObject = 0;
    clearService();
}

void QVideoWidgetPrivate::_q_brightnessChanged(int b)
{
    if (b != brightness)
        emit q_func()->brightnessChanged(brightness = b);
}

void QVideoWidgetPrivate::_q_contrastChanged(int c)
{
    if (c != contrast)
        emit q_func()->contrastChanged(contrast = c);
}

void QVideoWidgetPrivate::_q_hueChanged(int h)
{
    if (h != hue)
        emit q_func()->hueChanged(hue = h);
}

void QVideoWidgetPrivate::_q_saturationChanged(int s)
{
    if (s != saturation)
        emit q_func()->saturationChanged(saturation = s);
}


void QVideoWidgetPrivate::_q_fullScreenChanged(bool fullScreen)
{
    if (!fullScreen && q_func()->isFullScreen())
        q_func()->showNormal();
}

void QVideoWidgetPrivate::_q_dimensionsChanged()
{
    q_func()->updateGeometry();
}

/*!
    \class QVideoWidget
    \preliminary
    \since 4.7
    \brief The QVideoWidget class provides a widget which presents video
    produced by a media object.
    \ingroup multimedia

    Attaching a QVideoWidget to a QMediaObject allows it to display the
    video or image output of that media object.  A QVideoWidget is attached
    to media object by passing a pointer to the QMediaObject in its
    constructor, and detached by destroying the QVideoWidget.

    \code
        player = new QMediaPlayer;

        widget = new QVideoWidget(player);
        widget->show();

        player->setMedia(QUrl("http://example.com/movie.mp4"));
        player->play();
    \endcode

    \bold {Note}: Only a single display output can be attached to a media
    object at one time.

    \sa QMediaObject, QMediaPlayer, QGraphicsVideoItem
*/

/*!
    \enum QVideoWidget::AspectRatioMode

    Specfies how video is scaled with respect to its aspect ratio.

    \value IgnoreAspectRatio The video is scaled to fill the widget ignoring its aspect ratio.
    \value KeepAspectRatio The video is scaled to the largest rectangle that will fit within the
    widget's dimensions while still retaining its original aspect ratio.
*/

/*!
    Constructs a new video widget.

    The \a parent is passed to QWidget.
*/
QVideoWidget::QVideoWidget(QWidget *parent)
    : QWidget(parent, 0)
    , d_ptr(new QVideoWidgetPrivate)
{
    d_ptr->q_ptr = this;

    QPalette palette = QWidget::palette();
    palette.setColor(QPalette::Background, Qt::black);
    setPalette(palette);
}

/*!
    Destroys a video widget.
*/
QVideoWidget::~QVideoWidget()
{
    setMediaObject(0);
    delete d_ptr;
}

/*!
    \property QVideoWidget::mediaObject
    \brief the media object which provides the video displayed by a widget.
*/

QMediaObject *QVideoWidget::mediaObject() const
{
    return d_func()->mediaObject;
}

void QVideoWidget::setMediaObject(QMediaObject *object)
{
    Q_D(QVideoWidget);

    if (object == d->mediaObject)
        return;

    if (d->mediaObject) {
        disconnect(d->mediaObject, SIGNAL(destroyed()), this, SLOT(_q_mediaObjectDestroyed()));
        d->mediaObject->unbind(this);
    }

    d->clearService();

    d->mediaObject = object;

    if (d->mediaObject) {
        d->service = d->mediaObject->service();

        connect(d->mediaObject, SIGNAL(destroyed()), this, SLOT(_q_mediaObjectDestroyed()));
        d->mediaObject->bind(this);
    }

    if (d->service) {
        connect(d->service, SIGNAL(destroyed()), SLOT(_q_serviceDestroyed()));

        d->outputControl = qobject_cast<QVideoOutputControl *>(
                d->service->control(QVideoOutputControl_iid));

        QVideoWidgetControl *widgetControl = qobject_cast<QVideoWidgetControl *>(
                d->service->control(QVideoWidgetControl_iid));

        if (widgetControl != 0) {
            d->widgetBackend = new QVideoWidgetControlBackend(widgetControl, this);
        } else {
            QVideoWindowControl *windowControl = qobject_cast<QVideoWindowControl *>(
                    d->service->control(QVideoWindowControl_iid));

            if (windowControl != 0)
                d->windowBackend = new QWindowVideoWidgetBackend(windowControl, this);

            QVideoRendererControl *rendererControl = qobject_cast<QVideoRendererControl *>(
                    d->service->control(QVideoRendererControl_iid));

            if (rendererControl != 0)
                d->rendererBackend = new QRendererVideoWidgetBackend(rendererControl, this);
        }

        if (isVisible())
            d->show();
    }
}

/*!
    \property QVideoWidget::aspectRatioMode
    \brief how video is scaled with respect to its aspect ratio.
*/

QVideoWidget::AspectRatioMode QVideoWidget::aspectRatioMode() const
{
    return d_func()->aspectRatioMode;
}

void QVideoWidget::setAspectRatioMode(QVideoWidget::AspectRatioMode mode)
{
    Q_D(QVideoWidget);

    if (d->currentControl) {
        d->currentControl->setAspectRatioMode(mode);
        d->aspectRatioMode = d->currentControl->aspectRatioMode();
    } else {
        d->aspectRatioMode = mode;
    }
}

/*!
    \property QVideoWidget::fullScreen
    \brief whether video display is confined to a window or is fullScreen.
*/

void QVideoWidget::setFullScreen(bool fullScreen)
{
    Q_D(QVideoWidget);

    if (fullScreen) {
        Qt::WindowFlags flags = windowFlags();

        d->nonFullScreenFlags = flags & (Qt::Window | Qt::SubWindow);
        flags |= Qt::Window;
        flags &= ~Qt::SubWindow;
        setWindowFlags(flags);
        
        showFullScreen();
    } else {
        showNormal();
    }
}

/*!
    \fn QVideoWidget::fullScreenChanged(bool fullScreen)

    Signals that the \a fullScreen mode of a video widget has changed.

    \sa fullScreen
*/

/*!
    \property QVideoWidget::brightness
    \brief an adjustment to the brightness of displayed video.

    Valid brightness values range between -100 and 100, the default is 0.
*/

int QVideoWidget::brightness() const
{
    return d_func()->brightness;
}

void QVideoWidget::setBrightness(int brightness)
{
    Q_D(QVideoWidget);

    int boundedBrightness = qBound(-100, brightness, 100);

    if (d->currentControl)
        d->currentControl->setBrightness(boundedBrightness);
    else if (d->brightness != boundedBrightness)
        emit brightnessChanged(d->brightness = boundedBrightness);
}

/*!
    \fn QVideoWidget::brightnessChanged(int brightness)

    Signals that a video widgets's \a brightness adjustment has changed.

    \sa brightness
*/

/*!
    \property QVideoWidget::contrast
    \brief an adjustment to the contrast of displayed video.

    Valid contrast values range between -100 and 100, the default is 0.

*/

int QVideoWidget::contrast() const
{
    return d_func()->contrast;
}

void QVideoWidget::setContrast(int contrast)
{
    Q_D(QVideoWidget);

    int boundedContrast = qBound(-100, contrast, 100);

    if (d->currentControl)
        d->currentControl->setContrast(boundedContrast);
    else if (d->contrast != boundedContrast)
        emit contrastChanged(d->contrast = boundedContrast);
}

/*!
    \fn QVideoWidget::contrastChanged(int contrast)

    Signals that a video widgets's \a contrast adjustment has changed.

    \sa contrast
*/

/*!
    \property QVideoWidget::hue
    \brief an adjustment to the hue of displayed video.

    Valid hue values range between -100 and 100, the default is 0.
*/

int QVideoWidget::hue() const
{
    return d_func()->hue;
}

void QVideoWidget::setHue(int hue)
{
    Q_D(QVideoWidget);

    int boundedHue = qBound(-100, hue, 100);

    if (d->currentControl)
        d->currentControl->setHue(boundedHue);
    else if (d->hue != boundedHue)
        emit hueChanged(d->hue = boundedHue);
}

/*!
    \fn QVideoWidget::hueChanged(int hue)

    Signals that a video widgets's \a hue has changed.

    \sa hue
*/

/*!
    \property QVideoWidget::saturation
    \brief an adjustment to the saturation of displayed video.

    Valid saturation values range between -100 and 100, the default is 0.
*/

int QVideoWidget::saturation() const
{
    return d_func()->saturation;
}

void QVideoWidget::setSaturation(int saturation)
{
    Q_D(QVideoWidget);

    int boundedSaturation = qBound(-100, saturation, 100);

    if (d->currentControl)
        d->currentControl->setSaturation(boundedSaturation);
    else if (d->saturation != boundedSaturation)
        emit saturationChanged(d->saturation = boundedSaturation);

}

/*!
    \fn QVideoWidget::saturationChanged(int saturation)

    Signals that a video widgets's \a saturation has changed.

    \sa saturation
*/

/*!
  Returns the size hint for the current back end,
  if there is one, or else the size hint from QWidget.
 */
QSize QVideoWidget::sizeHint() const
{
    Q_D(const QVideoWidget);

    if (d->currentBackend)
        return d->currentBackend->sizeHint();
    else
        return QWidget::sizeHint();


}

/*!
    \reimp
    \internal
 */
bool QVideoWidget::event(QEvent *event)
{
    Q_D(QVideoWidget);

    if (event->type() == QEvent::WindowStateChange) {
        Qt::WindowFlags flags = windowFlags();

        if (windowState() & Qt::WindowFullScreen) {
            if (d->currentControl)
                d->currentControl->setFullScreen(true);

            if (!d->wasFullScreen)
                emit fullScreenChanged(d->wasFullScreen = true);
        } else {
            if (d->currentControl)
                d->currentControl->setFullScreen(false);

            if (d->wasFullScreen) {
                flags &= ~(Qt::Window | Qt::SubWindow); //clear the flags...
                flags |= d->nonFullScreenFlags; //then we reset the flags (window and subwindow)
                setWindowFlags(flags);

                emit fullScreenChanged(d->wasFullScreen = false);
            }
        }
    }
    return QWidget::event(event);
}

/*!
  Handles the show \a event.
 */
void QVideoWidget::showEvent(QShowEvent *event)
{
    Q_D(QVideoWidget);

    QWidget::showEvent(event);

    d->show();

}

/*!

  Handles the hide \a event.
*/
void QVideoWidget::hideEvent(QHideEvent *event)
{
    Q_D(QVideoWidget);

    if (d->currentBackend)
        d->currentBackend->hideEvent(event);

    QWidget::hideEvent(event);
}

/*!
  Handles the resize \a event.
 */
void QVideoWidget::resizeEvent(QResizeEvent *event)
{
    Q_D(QVideoWidget);

    QWidget::resizeEvent(event);

    if (d->currentBackend)
        d->currentBackend->resizeEvent(event);
}

/*!
  Handles the move \a event.
 */
void QVideoWidget::moveEvent(QMoveEvent *event)
{
    Q_D(QVideoWidget);

    if (d->currentBackend)
        d->currentBackend->moveEvent(event);
}

/*!
  Handles the paint \a event.
 */
void QVideoWidget::paintEvent(QPaintEvent *event)
{
    Q_D(QVideoWidget);

    if (d->currentBackend)
        d->currentBackend->paintEvent(event);
}

#include "moc_qvideowidget.cpp"
#include "moc_qvideowidget_p.cpp"

QT_END_NAMESPACE