atmelmediaplayer.cpp

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** Software Author: Timesys Corporation (www.timesys.com)
**
** Summary: Custom media playback widget with control buttons
**
****************************************************************************/

#include "atmelmediaplayer.h"
#include "ui_atmelmediaplayer.h"
#include <QTime>

#if (QT_VERSION >= 0x050000)
#include <QVideoWidget>
#include "seekslider.h"
#include "volumeslider.h"
#endif // (QT_VERSION >= 0x050000)

/***
     ** Default constructor
     ** For Qt5: Uses QtMultimedia. Constructs QMediaPlayer objects, defines player decoration through stylesheet
     ** Connects QMediaPlayer signals with handling routins.
     ** For Qt4: Uses Phonon. Constructs Phonon objects, defines player decoration through stylesheet
     ** Connects Phonon signals with handling routins
     **/

AtmelMediaPlayer::AtmelMediaPlayer(QWidget *parent) :
    QWidget(parent),

    #if (QT_VERSION >= 0x050000)
    m_mediaObject(new QMediaPlayer(this)),
    videoWidget(new QVideoWidget(this)),
    #else
    videoWidget(new Phonon::VideoWidget(this)),
    #endif // (QT_VERSION >= 0x050000)

    playIcon(QIcon(":/resources/mediaPlayer/play.png")),
    pauseIcon(QIcon(":/resources/mediaPlayer/pause.png")),
    ui(new Ui::AtmelMediaPlayer)
{
    ui->setupUi(this);

#if (QT_VERSION >= 0x050000)
    m_mediaObject->setVideoOutput(videoWidget);

    SeekSlider *mediaSlider = new SeekSlider(this);
    mediaSlider->setMediaObject(m_mediaObject);

    VolumeSlider *volumeSlider = new VolumeSlider(this);
    volumeSlider->setMediaObject(m_mediaObject);

#else
    Phonon::SeekSlider* mediaSlider = new Phonon::SeekSlider(this);
    mediaSlider->setMediaObject(&mediaObject);

    Phonon::VolumeSlider* volumeSlider = new Phonon::VolumeSlider(&audioOutput);
#endif // (QT_VERSION >= 0x050000)

    if (isSmallResolution) {

        float wSFactor = 480.0 / 800.;
        float hSFactor = 272.0 / 480.;

        QSize size(ui->playButton->iconSize().width() * wSFactor, ui->playButton->iconSize().height() * hSFactor);
        ui->playButton->setIconSize(size);
        ui->stopButton->setIconSize(size);


        QFont font = ui->label->font();
        font.setPointSize(font.pointSize() * wSFactor);
        ui->label->setFont(font);
        font = ui->lengthLabel->font();
        font.setPointSize(font.pointSize() * wSFactor);
        ui->lengthLabel->setFont(font);
        font = ui->timeLabel->font();
        font.setPointSize(font.pointSize() * wSFactor);
        ui->timeLabel->setFont(font);
        ui->label->setMinimumWidth(ui->label->minimumWidth()*wSFactor);
        ui->lengthLabel->setMinimumWidth(ui->lengthLabel->minimumWidth()*wSFactor);
        ui->timeLabel->setMinimumWidth(ui->timeLabel->minimumWidth()*wSFactor);


        volumeSlider->setStyleSheet(
                    "QSlider:horizontal { height: 20px; border-image: none;}"
                    "QSlider::handle { image: url(:/resources/smallmediaPlayer/slider-dot.png);"
                    " margin: -20px 0;}"

                    " QSlider::groove { ;"
                    "border: 2px solid #CCD5CC;"
                    "background: white;"
                    " margin: 10px 0px 10px 0px;"
                    " border-radius: 3px;"
                    " height: 2px};"

                    " QIcon { height: 30px; width: 30px; border-image: none; }");

        ui->sliderWidget->setStyleSheet(
                    "QSlider:horizontal { height: 20px;}"
                    "QSlider::handle { image: url(:/resources/smallmediaPlayer/slider-dot.png);"
                    " margin: -20px 0;}"

                    " QSlider::groove { ;"
                    "border: 2px solid #CCD5CC;"
                    "background: white;"
                    " margin: 10px 0px 10px 0px;"
                    " border-radius: 3px;"
                    " height: 4px};");
    }
    else
    {
#if (QT_VERSION >= 0x050000)
        volumeSlider->setStyleSheetForSlider(
            #else
        volumeSlider->setStyleSheet(
            #endif // (QT_VERSION >= 0x050000)
                    "QSlider:horizontal { height: 40px; border-image: none;}"
                    "QSlider::handle { image: url(:/resources/mediaPlayer/slider-dot.png);"
                    " margin: -40px 0;}"

                    " QSlider::groove { ;"
                    "border: 2px solid #CCD5CC;"
                    "background: white;"
                    " margin: 20px 0px 20px 0px;"
                    " border-radius: 3px;"
                    " height: 2px};"

                    " QIcon { height: 60px; width: 60px; border-image: none; }");

        ui->sliderWidget->setStyleSheet(
                    "QSlider:horizontal { height: 40px;}"
                    "QSlider::handle { image: url(:/resources/mediaPlayer/slider-dot.png);"
                    " margin: -40px 0;}"

                    " QSlider::groove { ;"
                    "border: 2px solid #CCD5CC;"
                    "background: white;"
                    " margin: 20px 0px 20px 0px;"
                    " border-radius: 3px;"
                    " height: 4px};");
    }

    ui->sliderLayout->insertWidget(0, mediaSlider);
    ui->videoLayout->addWidget(videoWidget);
    ui->videoWindow->hide();
    ui->timeLabel->setText("0:00");
    ui->horizontalLayout->insertWidget(3, volumeSlider);

#if (QT_VERSION >= 0x050000)
    connect(m_mediaObject, SIGNAL(durationChanged(qint64)), this, SLOT(totalTime()));
    connect(m_mediaObject, SIGNAL(positionChanged(qint64)), this, SLOT(trackTime()));
    connect(m_mediaObject, SIGNAL(videoAvailableChanged(bool)), this, SLOT(newVideoToPlay(bool)));
    connect(m_mediaObject, SIGNAL(mediaStatusChanged(QMediaPlayer::MediaStatus)),
            this, SLOT(updateMediaStatus(QMediaPlayer::MediaStatus)));
#else
    Phonon::createPath(&mediaObject, &audioOutput);
    Phonon::createPath(&mediaObject, videoWidget);

    connect(&mediaObject, SIGNAL(totalTimeChanged(qint64)), this, SLOT(totalTime()));
    connect(&mediaObject, SIGNAL(tick(qint64)), this, SLOT(trackTime()));
    connect(&mediaObject, SIGNAL(hasVideoChanged(bool)), this, SLOT(newVideoToPlay(bool)));
    connect(&mediaObject, SIGNAL(finished()), this, SLOT(videoPlaybackFinished()));
#endif // (QT_VERSION >= 0x050000)
}

/***
     ** Default destructor
     **/
AtmelMediaPlayer::~AtmelMediaPlayer()
{
    delete ui;
}

/***
     ** Make a playback object visible when there is a video to play
     **/
void AtmelMediaPlayer::newVideoToPlay(bool newVideo)
{
    ui->info->setVisible(!newVideo);
    ui->videoWindow->setVisible(newVideo);
}

/***
     ** Calculate/Display a total time for the current video
     **/
void AtmelMediaPlayer::totalTime()
{
    int sec, min, hour;

    long length =
        #if (QT_VERSION >= 0x050000)
            m_mediaObject->duration();
        #else
            mediaObject.totalTime();
        #endif // (QT_VERSION >= 0x050000)

    sec = length / 1000;
    min = sec / 60;
    hour = min / 60;

    QTime totalTime(hour%60, min%60, sec%60);

    QString displayFormat = "m:ss";

    ui->lengthLabel->setText(totalTime.toString(displayFormat));
}

/***
     ** Show tracked video playback time
     **/
void AtmelMediaPlayer::trackTime()
{
    int sec, min, hour;
    long pos =
        #if (QT_VERSION >= 0x050000)
            m_mediaObject->position();
        #else
            mediaObject.currentTime();
        #endif // (QT_VERSION >= 0x050000)

    sec = pos / 1000;
    min = sec / 60;
    hour = min / 60;

    QTime currentTime(hour%60, min%60, sec%60);

    QString timeFormat = "m:ss";

    ui->timeLabel->setText(currentTime.toString(timeFormat));
}

/***
     ** Function handler for the Play button
     ** switches playback state between play/pause
     **/
void AtmelMediaPlayer::on_playButton_clicked()
{
#if (QT_VERSION >= 0x050000)
    if (m_mediaObject->state() == QMediaPlayer::PlayingState) {
        m_mediaObject->pause();
        ui->playButton->setIcon(playIcon);
    } else {
        if (m_mediaObject->position() == m_mediaObject->duration())
            m_mediaObject->setPosition(0);
        m_mediaObject->play();
        ui->playButton->setIcon(pauseIcon);
    }
#else
    if (mediaObject.state() == Phonon::PlayingState){
        mediaObject.pause();
        ui->playButton->setIcon(playIcon);
    } else {
        if (mediaObject.currentTime() == mediaObject.totalTime())
            mediaObject.seek(0);
        mediaObject.play();
        ui->playButton->setIcon(pauseIcon);
    }
#endif // (QT_VERSION >= 0x050000)
}

/***
     ** Function handler for the Stop button
     **/
void AtmelMediaPlayer::on_stopButton_clicked()
{
#if (QT_VERSION >= 0x050000)
    m_mediaObject->setPosition(0);
    m_mediaObject->stop();
#else
    mediaObject.seek(0);
    mediaObject.stop();
#endif // (QT_VERSION >= 0x050000)
    ui->playButton->setIcon(playIcon);
    ui->timeLabel->setText("0:00");
}

/***
     ** Sets the path to the media file that should play next in this widget
     ** Starts the playback
     **/
void AtmelMediaPlayer::setFileToPlay(const QString &path)
{
#if (QT_VERSION >= 0x050000)
    if (m_mediaObject->state() == QMediaPlayer::PlayingState)
        m_mediaObject->stop();
    m_mediaObject->setMedia(QUrl::fromLocalFile(path));
    m_mediaObject->play();
#else
    if (mediaObject.state() == 2) // TODO: avoid 2
        mediaObject.stop();
    mediaObject.setCurrentSource(Phonon::MediaSource(path));
    mediaObject.play();
#endif // (QT_VERSION >= 0x050000)
    ui->playButton->setIcon(pauseIcon);
}

/***
     ** Signal handler for when the video is done playing
     **/
void AtmelMediaPlayer::videoPlaybackFinished()
{
    on_stopButton_clicked();
}

/***
     ** Public function to stop playback from outside of this object
     **/
void AtmelMediaPlayer::stopPlayback()
{
    on_stopButton_clicked();
}

#if (QT_VERSION >= 0x050000)
void AtmelMediaPlayer::updateMediaStatus(QMediaPlayer::MediaStatus status)
{
    switch(status) {
    case QMediaPlayer::UnknownMediaStatus:
        qDebug("Unknown Media Status");
        break;
    case QMediaPlayer::NoMedia:
        qDebug("No Media");
        break;
    case QMediaPlayer::LoadingMedia:
        qDebug("In Loading state");
        break;
    case QMediaPlayer::LoadedMedia:
        qDebug("Media has been Loaded");
        break;
    case QMediaPlayer::StalledMedia:
        qDebug("Media is stalled");
        break;
    case QMediaPlayer::BufferingMedia:
        qDebug("In Buffering state");
        break;
    case QMediaPlayer::BufferedMedia:
        qDebug("Media has been buffered");
        break;
    case QMediaPlayer::EndOfMedia:
        qDebug("End of Media");
        videoPlaybackFinished();
        break;
    case QMediaPlayer::InvalidMedia:
        qDebug("Invalid Media");
        break;
    }
}
#endif // (QT_VERSION >= 0x050000)