qmediaplayer.cpp

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#include "qmediaplayer_p.h"
 
#include <private/qplatformmediaintegration_p.h>
#include <qvideosink.h>
#include <qaudiooutput.h>
 
#include <QtCore/qcoreevent.h>
#include <QtCore/qmetaobject.h>
#include <QtCore/qtimer.h>
#include <QtCore/qdebug.h>
#include <QtCore/qpointer.h>
#include <QtCore/qfileinfo.h>
#include <QtCore/qtemporaryfile.h>
#include <QtCore/qdir.h>
#include <QtCore/qcoreapplication.h>
 
#if defined(Q_OS_ANDROID)
#  include <QtCore/qjniobject.h>
#endif
 
QT_BEGIN_NAMESPACE
 
void QMediaPlayerPrivate::setState(QMediaPlayer::PlaybackState ps)
{
    Q_Q(QMediaPlayer);
 
    if (ps != state) {
        if (ps == QMediaPlayer::PlayingState || state == QMediaPlayer::PlayingState)
            emit q->playingChanged(ps == QMediaPlayer::PlayingState);
        state = ps;
        emit q->playbackStateChanged(ps);
    }
}
 
void QMediaPlayerPrivate::setStatus(QMediaPlayer::MediaStatus s)
{
    Q_Q(QMediaPlayer);
 
    emit q->mediaStatusChanged(s);
}
 
void QMediaPlayerPrivate::setError(QMediaPlayer::Error error, const QString &errorString)
{
    Q_Q(QMediaPlayer);
 
    auto prevError = std::exchange(this->error, error);
    auto prevErrorString = std::exchange(this->errorString, errorString);
 
    if (prevError != error || prevErrorString != errorString)
        emit q->errorChanged();
 
    if (error != QMediaPlayer::NoError)
        emit q->errorOccurred(error, errorString);
}
 
void QMediaPlayerPrivate::setMedia(const QUrl &media, QIODevice *stream)
{
    if (!control)
        return;
 
    std::unique_ptr<QFile> file;
 
    // Back ends can't play qrc files directly.
    // If the back end supports StreamPlayback, we pass a QFile for that resource.
    // If it doesn't, we copy the data to a temporary file and pass its path.
    if (!media.isEmpty() && !stream && media.scheme() == QLatin1String("qrc")) {
        qrcMedia = media;
 
        file.reset(new QFile(QLatin1Char(':') + media.path()));
        if (!file->open(QFile::ReadOnly)) {
            file.reset();
            control->setMedia(QUrl(), nullptr);
            control->mediaStatusChanged(QMediaPlayer::InvalidMedia);
            control->error(QMediaPlayer::ResourceError, QMediaPlayer::tr("Attempting to play invalid Qt resource"));
 
        } else if (control->streamPlaybackSupported()) {
            control->setMedia(media, file.get());
        } else {
#if QT_CONFIG(temporaryfile)
#if defined(Q_OS_ANDROID)
            QString tempFileName = QDir::tempPath() + media.path();
            QDir().mkpath(QFileInfo(tempFileName).path());
            QTemporaryFile *tempFile = QTemporaryFile::createNativeFile(*file);
            if (!tempFile->rename(tempFileName))
                qWarning() << "Could not rename temporary file to:" << tempFileName;
#else
            QTemporaryFile *tempFile = new QTemporaryFile;
 
            // Preserve original file extension, some back ends might not load the file if it doesn't
            // have an extension.
            const QString suffix = QFileInfo(*file).suffix();
            if (!suffix.isEmpty())
                tempFile->setFileTemplate(tempFile->fileTemplate() + QLatin1Char('.') + suffix);
 
            // Copy the qrc data into the temporary file
            if (!tempFile->open()) {
                control->setMedia(QUrl(), nullptr);
                control->mediaStatusChanged(QMediaPlayer::InvalidMedia);
                control->error(QMediaPlayer::ResourceError, tempFile->errorString());
                delete tempFile;
                qrcFile.reset();
                return;
            }
            char buffer[4096];
            while (true) {
                qint64 len = file->read(buffer, sizeof(buffer));
                if (len < 1)
                    break;
                tempFile->write(buffer, len);
            }
            tempFile->close();
#endif
            file.reset(tempFile);
            control->setMedia(QUrl(QUrl::fromLocalFile(file->fileName())), nullptr);
#else
            qWarning("Qt was built with -no-feature-temporaryfile: playback from resource file is not supported!");
#endif
        }
    } else {
        qrcMedia = QUrl();
        QUrl url = media;
        if (url.scheme().isEmpty() || url.scheme() == QLatin1String("file"))
            url = QUrl::fromUserInput(media.path(), QDir::currentPath(), QUrl::AssumeLocalFile);
        if (url.scheme() == QLatin1String("content") && !stream) {
            file.reset(new QFile(media.url()));
            stream = file.get();
        }
 
        control->setMedia(url, stream);
    }
 
    qrcFile.swap(file); // Cleans up any previous file
}
 
QList<QMediaMetaData> QMediaPlayerPrivate::trackMetaData(QPlatformMediaPlayer::TrackType s) const
{
    QList<QMediaMetaData> tracks;
    if (control) {
        int count = control->trackCount(s);
        for (int i = 0; i < count; ++i) {
            tracks.append(control->trackMetaData(s, i));
        }
    }
    return tracks;
}
 
QMediaPlayer::QMediaPlayer(QObject *parent)
    : QObject(*new QMediaPlayerPrivate, parent)
{
    Q_D(QMediaPlayer);
 
    auto maybeControl = QPlatformMediaIntegration::instance()->createPlayer(this);
    if (maybeControl) {
        d->control = maybeControl.value();
        d->state = d->control->state();
    } else {
        qWarning() << "Failed to initialize QMediaPlayer" << maybeControl.error();
        d->setError(QMediaPlayer::ResourceError, maybeControl.error());
    }
}
 
 
QMediaPlayer::~QMediaPlayer()
{
    Q_D(QMediaPlayer);
 
    // Disconnect everything to prevent notifying
    // when a receiver is already destroyed.
    disconnect();
    setAudioOutput(nullptr);
 
    d->setVideoSink(nullptr);
    delete d->control;
}
 
QUrl QMediaPlayer::source() const
{
    Q_D(const QMediaPlayer);
 
    return d->source;
}
 
const QIODevice *QMediaPlayer::sourceDevice() const
{
    Q_D(const QMediaPlayer);
 
    return d->stream;
}
 
QMediaPlayer::PlaybackState QMediaPlayer::playbackState() const
{
    Q_D(const QMediaPlayer);
 
    // In case if EndOfMedia status is already received
    // but state is not.
    if (d->control
        && d->control->mediaStatus() == QMediaPlayer::EndOfMedia
        && d->state != d->control->state()) {
        return d->control->state();
    }
 
    return d->state;
}
 
QMediaPlayer::MediaStatus QMediaPlayer::mediaStatus() const
{
    Q_D(const QMediaPlayer);
    return d->control ? d->control->mediaStatus() : NoMedia;
}
 
qint64 QMediaPlayer::duration() const
{
    Q_D(const QMediaPlayer);
    return d->control ? d->control->duration() : 0;
}
 
qint64 QMediaPlayer::position() const
{
    Q_D(const QMediaPlayer);
    return d->control ? d->control->position() : 0;
}
 
float QMediaPlayer::bufferProgress() const
{
    Q_D(const QMediaPlayer);
    return d->control ? d->control->bufferProgress() : 0;
}
 
QMediaTimeRange QMediaPlayer::bufferedTimeRange() const
{
    Q_D(const QMediaPlayer);
    return d->control ? d->control->availablePlaybackRanges() : QMediaTimeRange{};
}
 
bool QMediaPlayer::hasAudio() const
{
    Q_D(const QMediaPlayer);
    return d->control && d->control->isAudioAvailable();
}
 
bool QMediaPlayer::hasVideo() const
{
    Q_D(const QMediaPlayer);
    return d->control && d->control->isVideoAvailable();
}
 
bool QMediaPlayer::isSeekable() const
{
    Q_D(const QMediaPlayer);
    return d->control && d->control->isSeekable();
}
 
bool QMediaPlayer::isPlaying() const
{
    Q_D(const QMediaPlayer);
    return d->state == QMediaPlayer::PlayingState;
}
 
qreal QMediaPlayer::playbackRate() const
{
    Q_D(const QMediaPlayer);
    return d->control ? d->control->playbackRate() : 0.;
}
 
int QMediaPlayer::loops() const
{
    Q_D(const QMediaPlayer);
    return d->control ? d->control->loops() : 1;
}
 
void QMediaPlayer::setLoops(int loops)
{
    Q_D(QMediaPlayer);
    if (loops == 0)
        return;
    if (d->control)
        d->control->setLoops(loops);
}
 
QMediaPlayer::Error QMediaPlayer::error() const
{
    return d_func()->error;
}
 
QString QMediaPlayer::errorString() const
{
    return d_func()->errorString;
}
 
void QMediaPlayer::play()
{
    Q_D(QMediaPlayer);
 
    if (!d->control)
        return;
 
    // Reset error conditions
    d->setError(NoError, QString());
 
    d->control->play();
}
 
void QMediaPlayer::pause()
{
    Q_D(QMediaPlayer);
 
    if (d->control)
        d->control->pause();
}
 
void QMediaPlayer::stop()
{
    Q_D(QMediaPlayer);
 
    if (d->control)
        d->control->stop();
}
 
void QMediaPlayer::setPosition(qint64 position)
{
    Q_D(QMediaPlayer);
 
    if (!d->control)
        return;
    if (!d->control->isSeekable())
        return;
    d->control->setPosition(qMax(position, 0ll));
}
 
void QMediaPlayer::setPlaybackRate(qreal rate)
{
    Q_D(QMediaPlayer);
 
    if (d->control)
        d->control->setPlaybackRate(rate);
}
 
void QMediaPlayer::setSource(const QUrl &source)
{
    Q_D(QMediaPlayer);
    stop();
 
    if (d->source == source && d->stream == nullptr)
        return;
 
    d->source = source;
    d->stream = nullptr;
 
    d->setMedia(source, nullptr);
    emit sourceChanged(d->source);
}
 
void QMediaPlayer::setSourceDevice(QIODevice *device, const QUrl &sourceUrl)
{
    Q_D(QMediaPlayer);
    stop();
 
    if (d->source == sourceUrl && d->stream == device)
        return;
 
    d->source = sourceUrl;
    d->stream = device;
 
    d->setMedia(d->source, device);
    emit sourceChanged(d->source);
}
 
void QMediaPlayer::setAudioOutput(QAudioOutput *output)
{
    Q_D(QMediaPlayer);
    auto oldOutput = d->audioOutput;
    if (oldOutput == output)
        return;
    d->audioOutput = output;
    if (d->control)
        d->control->setAudioOutput(nullptr);
    if (oldOutput)
        oldOutput->setDisconnectFunction({});
    if (output) {
        output->setDisconnectFunction([this](){ setAudioOutput(nullptr); });
        if (d->control)
            d->control->setAudioOutput(output->handle());
    }
    emit audioOutputChanged();
}
 
QAudioOutput *QMediaPlayer::audioOutput() const
{
    Q_D(const QMediaPlayer);
    return d->audioOutput;
}
 
QList<QMediaMetaData> QMediaPlayer::audioTracks() const
{
    Q_D(const QMediaPlayer);
    return d->trackMetaData(QPlatformMediaPlayer::AudioStream);
}
 
QList<QMediaMetaData> QMediaPlayer::videoTracks() const
{
    Q_D(const QMediaPlayer);
    return d->trackMetaData(QPlatformMediaPlayer::VideoStream);
}
 
QList<QMediaMetaData> QMediaPlayer::subtitleTracks() const
{
    Q_D(const QMediaPlayer);
    return d->trackMetaData(QPlatformMediaPlayer::SubtitleStream);
}
 
int QMediaPlayer::activeAudioTrack() const
{
    Q_D(const QMediaPlayer);
    return d->control ? d->control->activeTrack(QPlatformMediaPlayer::AudioStream) : 0;
}
 
int QMediaPlayer::activeVideoTrack() const
{
    Q_D(const QMediaPlayer);
    return d->control ? d->control->activeTrack(QPlatformMediaPlayer::VideoStream) : -1;
}
 
int QMediaPlayer::activeSubtitleTrack() const
{
    Q_D(const QMediaPlayer);
    return d->control ? d->control->activeTrack(QPlatformMediaPlayer::SubtitleStream) : -1;
}
 
void QMediaPlayer::setActiveAudioTrack(int index)
{
    Q_D(QMediaPlayer);
    if (!d->control)
        return;
 
    if (activeAudioTrack() == index)
        return;
    d->control->setActiveTrack(QPlatformMediaPlayer::AudioStream, index);
}
 
void QMediaPlayer::setActiveVideoTrack(int index)
{
    Q_D(QMediaPlayer);
    if (!d->control)
        return;
 
    if (activeVideoTrack() == index)
        return;
    d->control->setActiveTrack(QPlatformMediaPlayer::VideoStream, index);
}
 
void QMediaPlayer::setActiveSubtitleTrack(int index)
{
    Q_D(QMediaPlayer);
    if (!d->control)
        return;
 
    if (activeSubtitleTrack() == index)
        return;
    d->control->setActiveTrack(QPlatformMediaPlayer::SubtitleStream, index);
}
 
QObject *QMediaPlayer::videoOutput() const
{
    Q_D(const QMediaPlayer);
    return d->videoOutput;
}
 
void QMediaPlayer::setVideoOutput(QObject *output)
{
    Q_D(QMediaPlayer);
    if (d->videoOutput == output)
        return;
 
    auto *sink = qobject_cast<QVideoSink *>(output);
    if (!sink && output) {
        auto *mo = output->metaObject();
        mo->invokeMethod(output, "videoSink", Q_RETURN_ARG(QVideoSink *, sink));
    }
    d->videoOutput = output;
    d->setVideoSink(sink);
}
 
void QMediaPlayer::setVideoSink(QVideoSink *sink)
{
    Q_D(QMediaPlayer);
    d->videoOutput = nullptr;
    d->setVideoSink(sink);
}
 
QVideoSink *QMediaPlayer::videoSink() const
{
    Q_D(const QMediaPlayer);
    return d->videoSink;
}
 
 
#if 0
/*
    \since 5.15
    Sets multiple video sinks as the video output of a media player.
    This allows the media player to render video frames on several outputs.
 
    If a video output has already been set on the media player the new surfaces
    will replace it.
*/
void QMediaPlayer::setVideoOutput(const QList<QVideoSink *> &sinks)
{
    // ### IMPLEMENT ME
    Q_UNUSED(sinks);
//    setVideoOutput(!surfaces.empty() ? new QVideoSurfaces(surfaces, this) : nullptr);
}
#endif
 
bool QMediaPlayer::isAvailable() const
{
    Q_D(const QMediaPlayer);
    return bool(d->control);
}
 
QMediaMetaData QMediaPlayer::metaData() const
{
    Q_D(const QMediaPlayer);
    return d->control ? d->control->metaData() : QMediaMetaData{};
}
 
// Enums
// Properties
QT_END_NAMESPACE
 
#include "moc_qmediaplayer.cpp"