/******************************************************************************
    QtAV:  Multimedia framework based on Qt and FFmpeg
    Copyright (C) 2012-2016 Wang Bin <wbsecg1@gmail.com>

*   This file is part of QtAV (from 2014)

    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 of the License, or (at your option) any later version.

    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, write to the Free Software
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
******************************************************************************/

#include "VideoOutput.h"
#include "VideoRenderer_p.h"
#include "version.h"
#include <QtCore/QLibrary>
#include <QtGui/QResizeEvent>
#include "Logger.h"
/*!
 * onSetXXX(...): impl->onSetXXX(...); set value as impl; return ;
 */

namespace FAV {

class VideoOutputPrivate : public VideoRendererPrivate
{
public:
    VideoOutputPrivate(VideoRendererId rendererId, bool force) {
        if (!VideoRenderer::id("Widget")) {
            //TODO: dso version check?
#if defined(Q_OS_DARWIN)
            avwidgets.setFileName(QStringLiteral("QtAVWidgets.framework/QtAVWidgets")); //no dylib check
#elif defined(Q_OS_WIN)
            avwidgets.setFileName(QStringLiteral("QtAVWidgets").append(QString::number(QTAV_VERSION_MAJOR(QtAV_Version()))));
#else
            avwidgets.setFileNameAndVersion(QStringLiteral("QtAVWidgets"), QTAV_VERSION_MAJOR(QtAV_Version()));
#endif
            qDebug() << "Loading QtAVWidgets module: " << avwidgets.fileName();
            if (!avwidgets.load()) {
                qWarning("Failed to load QtAVWidgets module");
            }
        }
        impl = VideoRenderer::create(rendererId);
        if (!impl && !force) {
            VideoRendererId *vid = NULL;
            while ((vid = VideoRenderer::next(vid))) {
                qDebug("next id: %d, name: %s", *vid, VideoRenderer::name(*vid));
                if (impl) {
                    delete impl;
                    impl = 0;
                }
                impl = VideoRenderer::create(*vid);
                if (impl && impl->isAvailable() && impl->widget())
                    break;
            }
        }
        available = !!impl;
        if (!available)
            return;
        // set members as impl's that may be already set in ctor
        filters = impl->filters();
        renderer_width = impl->rendererWidth();
        renderer_height = impl->rendererHeight();
        src_width = impl->videoFrameSize().width();
        src_height = impl->videoFrameSize().height();
        source_aspect_ratio = qreal(src_width)/qreal(src_height);
        out_aspect_ratio_mode = impl->outAspectRatioMode();
        out_aspect_ratio = impl->outAspectRatio();
        quality = impl->quality();
        out_rect = impl->videoRect();
        roi = impl->regionOfInterest();
        preferred_format = impl->preferredPixelFormat();
        force_preferred = impl->isPreferredPixelFormatForced();
        brightness = impl->brightness();
        contrast = impl->contrast();
        hue = impl->hue();
        saturation = impl->saturation();
    }
    ~VideoOutputPrivate() {
        if (impl) {
            QObject* obj = reinterpret_cast<QObject*>(impl->widget());
            if (obj && !obj->parent())
                obj->deleteLater();
            impl = 0;
        }
    }

    VideoRenderer *impl;
    QLibrary avwidgets;
};

VideoOutput::VideoOutput(QObject *parent)
    : QObject(parent)
    , VideoRenderer(*new VideoOutputPrivate(0, false))
{
    if (d_func().impl && d_func().impl->widget()) {
        ((QObject*)d_func().impl->widget())->installEventFilter(this);
    }
}

VideoOutput::VideoOutput(VideoRendererId rendererId, QObject *parent)
    : QObject(parent)
    , VideoRenderer(*new VideoOutputPrivate(rendererId, true))
{
    if (d_func().impl && d_func().impl->widget()) {
        ((QObject*)d_func().impl->widget())->installEventFilter(this);
    }
}

VideoOutput::~VideoOutput()
{
    if (d_func().impl && d_func().impl->widget()) {
        ((QObject*)d_func().impl->widget())->removeEventFilter(this);
    }
}

VideoRendererId VideoOutput::id() const
{
    if (!isAvailable())
        return 0;
    return d_func().impl->id();
}

bool VideoOutput::onSetPreferredPixelFormat(VideoFormat::PixelFormat pixfmt)
{
    if (!isAvailable())
        return false;
    DPTR_D(VideoOutput);
    d.impl->setPreferredPixelFormat(pixfmt);
    return pixfmt == d.impl->preferredPixelFormat();

}

VideoFormat::PixelFormat VideoOutput::preferredPixelFormat() const
{
    if (!isAvailable())
        return VideoFormat::Format_Invalid;
    return d_func().impl->preferredPixelFormat();
}

bool VideoOutput::isSupported(VideoFormat::PixelFormat pixfmt) const
{
    if (!isAvailable())
        return false;
    return d_func().impl->isSupported(pixfmt);
}

QWindow* VideoOutput::qwindow()
{
    if (!isAvailable())
        return 0;
    return d_func().impl->qwindow();
}

QWidget* VideoOutput::widget()
{
    if (!isAvailable())
        return 0;
    return d_func().impl->widget();
}

QGraphicsItem* VideoOutput::graphicsItem()
{
    if (!isAvailable())
        return 0;
    return d_func().impl->graphicsItem();
}

OpenGLVideo* VideoOutput::opengl() const
{
    if (!isAvailable())
        return 0;
    return d_func().impl->opengl();
}

bool VideoOutput::eventFilter(QObject *obj, QEvent *event)
{
    DPTR_D(VideoOutput);
    if (!d.impl || (QObject*)d.impl->widget() != obj)
        return QObject::eventFilter(obj, event);
    if (event->type() == QEvent::Resize) {
        QResizeEvent *re = static_cast<QResizeEvent*>(event);
        resizeRenderer(re->size());
    }
    return QObject::eventFilter(obj, event);
}

bool VideoOutput::receiveFrame(const VideoFrame& frame)
{
    if (!isAvailable())
        return false;
    DPTR_D(VideoOutput);
    d.impl->d_func().source_aspect_ratio = d.source_aspect_ratio;
    d.impl->setInSize(frame.size());
    QMutexLocker locker(&d.impl->d_func().img_mutex);
    Q_UNUSED(locker); //TODO: double buffer for display/dec frame to avoid mutex
    return d.impl->receiveFrame(frame);
}

void VideoOutput::drawBackground()
{
    if (!isAvailable())
        return;
    DPTR_D(VideoOutput);
    d.impl->drawBackground();
}

void VideoOutput::drawFrame()
{
    if (!isAvailable())
        return;
    DPTR_D(VideoOutput);
    d.impl->drawFrame();
}

void VideoOutput::handlePaintEvent()
{
    if (!isAvailable())
        return;
    DPTR_D(VideoOutput);
    d.impl->handlePaintEvent();
}


bool VideoOutput::onForcePreferredPixelFormat(bool force)
{
    if (!isAvailable())
        return false;
    DPTR_D(VideoOutput);
    d.impl->forcePreferredPixelFormat(force);
    return d.impl->isPreferredPixelFormatForced() == force;
}

void VideoOutput::onSetOutAspectRatioMode(OutAspectRatioMode mode)
{
    if (!isAvailable())
        return;
    DPTR_D(VideoOutput);
    d.impl->setOutAspectRatioMode(mode);
}

void VideoOutput::onSetOutAspectRatio(qreal ratio)
{
    if (!isAvailable())
        return;
    DPTR_D(VideoOutput);
    d.impl->setOutAspectRatio(ratio);
}

bool VideoOutput::onSetQuality(Quality q)
{
    if (!isAvailable())
        return false;
    DPTR_D(VideoOutput);
    d.impl->setQuality(q);
    return d.impl->quality() == q;
}

bool VideoOutput::onSetOrientation(int value)
{
    if (!isAvailable())
        return false;
    value = (value + 360) % 360;
    DPTR_D(VideoOutput);
    d.impl->setOrientation(value);
    if (d.impl->orientation() != value) {
        return false;
    }
    return true;
}

void VideoOutput::onResizeRenderer(int width, int height)
{
    if (!isAvailable())
        return;
    DPTR_D(VideoOutput);
    d.impl->resizeRenderer(width, height);
}

bool VideoOutput::onSetRegionOfInterest(const QRectF& roi)
{
    if (!isAvailable())
        return false;
    DPTR_D(VideoOutput);
    d.impl->setRegionOfInterest(roi);
    return true;
}

QPointF VideoOutput::onMapToFrame(const QPointF& p) const
{
    if (!isAvailable())
        return QPointF();
    DPTR_D(const VideoOutput);
    return d.impl->onMapToFrame(p);
}

QPointF VideoOutput::onMapFromFrame(const QPointF& p) const
{
    if (!isAvailable())
        return QPointF();
    DPTR_D(const VideoOutput);
    return d.impl->onMapFromFrame(p);
}

bool VideoOutput::onSetBrightness(qreal brightness)
{
    if (!isAvailable())
        return false;
    DPTR_D(VideoOutput);
    // not call onSetXXX here, otherwise states in impl will not change
    d.impl->setBrightness(brightness);
    if (brightness != d.impl->brightness()) {
        return false;
    }
    return true;
}

bool VideoOutput::onSetContrast(qreal contrast)
{
    if (!isAvailable())
        return false;
    DPTR_D(VideoOutput);
    // not call onSetXXX here, otherwise states in impl will not change
    d.impl->setContrast(contrast);
    if (contrast != d.impl->contrast()) {
        return false;
    }
    return true;
}

bool VideoOutput::onSetHue(qreal hue)
{
    if (!isAvailable())
        return false;
    DPTR_D(VideoOutput);
    // not call onSetXXX here, otherwise states in impl will not change
    d.impl->setHue(hue);
    if (hue != d.impl->hue()) {
        return false;
    }
    return true;
}

bool VideoOutput::onSetSaturation(qreal saturation)
{
    if (!isAvailable())
        return false;
    DPTR_D(VideoOutput);
    // not call onSetXXX here, otherwise states in impl will not change
    d.impl->setSaturation(saturation);
    if (saturation != d.impl->saturation()) {
        return false;
    }
    return true;
}

void VideoOutput::onSetBackgroundColor(const QColor &color)
{
    if (!isAvailable())
        return;
    d_func().impl->setBackgroundColor(color);
}

void VideoOutput::setStatistics(Statistics* statistics)
{
    if (!isAvailable())
        return;
    DPTR_D(VideoOutput);
    d.impl->setStatistics(statistics);
    // only used internally for AVOutput
    //d.statistics =
}

bool VideoOutput::onInstallFilter(Filter *filter, int index)
{
    if (!isAvailable())
        return false;
    DPTR_D(VideoOutput);
    bool ret = d.impl->onInstallFilter(filter, index);
    d.filters = d.impl->filters();
    return ret;
}

bool VideoOutput::onUninstallFilter(Filter *filter)
{
    if (!isAvailable())
        return false;
    DPTR_D(VideoOutput);
    bool ret = d.impl->onUninstallFilter(filter);
    // only used internally for AVOutput
    //d.pending_uninstall_filters =
    return ret;
}

bool VideoOutput::onHanlePendingTasks()
{
    if (!isAvailable())
        return false;
    DPTR_D(VideoOutput);
    if (!d.impl->onHanlePendingTasks())
        return false;
    d.filters = d.impl->filters();
    return true;
}

} //namespace FAV