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videoplayer.cpp 6.04 KiB
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/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** You may use this file under the terms of the BSD license as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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**   * Redistributions of source code must retain the above copyright
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**     notice, this list of conditions and the following disclaimer.
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**   * Redistributions in binary form must reproduce the above copyright
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**     notice, this list of conditions and the following disclaimer in
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**     the documentation and/or other materials provided with the
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**     distribution.
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**   * Neither the name of The Qt Company Ltd nor the names of its
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**     contributors may be used to endorse or promote products derived
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**     from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "videoplayer.h"
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#include <QtWidgets>
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#include <QGraphicsVideoItem>
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VideoPlayer::VideoPlayer(QWidget *parent)
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    : QWidget(parent)
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{
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    m_mediaPlayer = new QMediaPlayer(this, QMediaPlayer::VideoSurface);
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    const QRect screenGeometry = QApplication::desktop()->screenGeometry(this);
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    m_videoItem = new QGraphicsVideoItem;
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    m_videoItem->setSize(QSizeF(screenGeometry.width() / 3, screenGeometry.height() / 2));
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    QGraphicsScene *scene = new QGraphicsScene(this);
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    QGraphicsView *graphicsView = new QGraphicsView(scene);
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    scene->addItem(m_videoItem);
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    QSlider *rotateSlider = new QSlider(Qt::Horizontal);
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    rotateSlider->setToolTip(tr("Rotate Video"));
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    rotateSlider->setRange(-180,  180);
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    rotateSlider->setValue(0);
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    connect(rotateSlider, &QAbstractSlider::valueChanged,
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            this, &VideoPlayer::rotateVideo);
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    QAbstractButton *openButton = new QPushButton(tr("Open..."));
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    connect(openButton, &QAbstractButton::clicked, this, &VideoPlayer::openFile);
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    m_playButton = new QPushButton;
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m_playButton->setEnabled(false); m_playButton->setIcon(style()->standardIcon(QStyle::SP_MediaPlay)); connect(m_playButton, &QAbstractButton::clicked, this, &VideoPlayer::play); m_positionSlider = new QSlider(Qt::Horizontal); m_positionSlider->setRange(0, 0); connect(m_positionSlider, &QAbstractSlider::sliderMoved, this, &VideoPlayer::setPosition); QBoxLayout *controlLayout = new QHBoxLayout; controlLayout->setMargin(0); controlLayout->addWidget(openButton); controlLayout->addWidget(m_playButton); controlLayout->addWidget(m_positionSlider); QBoxLayout *layout = new QVBoxLayout(this); layout->addWidget(graphicsView); layout->addWidget(rotateSlider); layout->addLayout(controlLayout); m_mediaPlayer->setVideoOutput(m_videoItem); connect(m_mediaPlayer, &QMediaPlayer::stateChanged, this, &VideoPlayer::mediaStateChanged); connect(m_mediaPlayer, &QMediaPlayer::positionChanged, this, &VideoPlayer::positionChanged); connect(m_mediaPlayer, &QMediaPlayer::durationChanged, this, &VideoPlayer::durationChanged); } VideoPlayer::~VideoPlayer() { } QSize VideoPlayer::sizeHint() const { return (m_videoItem->size() * qreal(3) / qreal(2)).toSize(); } bool VideoPlayer::isPlayerAvailable() const { return m_mediaPlayer->isAvailable(); } void VideoPlayer::openFile() { QFileDialog fileDialog(this); fileDialog.setAcceptMode(QFileDialog::AcceptOpen); fileDialog.setWindowTitle(tr("Open Movie")); const QStringList supportedMimeTypes = m_mediaPlayer->supportedMimeTypes(); if (!supportedMimeTypes.isEmpty()) fileDialog.setMimeTypeFilters(supportedMimeTypes); fileDialog.setDirectory(QStandardPaths::standardLocations(QStandardPaths::MoviesLocation).value(0, QDir::homePath())); if (fileDialog.exec() == QDialog::Accepted) load(fileDialog.selectedUrls().constFirst()); } void VideoPlayer::load(const QUrl &url) { m_mediaPlayer->setMedia(url); m_playButton->setEnabled(true); } void VideoPlayer::play() { switch (m_mediaPlayer->state()) { case QMediaPlayer::PlayingState: m_mediaPlayer->pause(); break; default: m_mediaPlayer->play();
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break; } } void VideoPlayer::mediaStateChanged(QMediaPlayer::State state) { switch(state) { case QMediaPlayer::PlayingState: m_playButton->setIcon(style()->standardIcon(QStyle::SP_MediaPause)); break; default: m_playButton->setIcon(style()->standardIcon(QStyle::SP_MediaPlay)); break; } } void VideoPlayer::positionChanged(qint64 position) { m_positionSlider->setValue(position); } void VideoPlayer::durationChanged(qint64 duration) { m_positionSlider->setRange(0, duration); } void VideoPlayer::setPosition(int position) { m_mediaPlayer->setPosition(position); } void VideoPlayer::rotateVideo(int angle) { //rotate around the center of video element qreal x = m_videoItem->boundingRect().width() / 2.0; qreal y = m_videoItem->boundingRect().height() / 2.0; m_videoItem->setTransform(QTransform().translate(x, y).rotate(angle).translate(-x, -y)); }