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832c3929f2222e0e10ada33549c9d1cf90373018
qtmultimedia/src/multimedia/playback/qmediaplayer.cpp
Sze Howe Koh 832c3929f2 Rename namespace QtMultimedia -> QMultimedia 
Main code, examples, tests and docs updated. Method:
1. Mass find+replace "QtMultimedia::" -> "QMultimedia::"
2. Hand-modified declaration in qtmedianamespace.h/cpp

For consistency (with minimal disruption), namespaces with a "Qt" prefix
will be renamed.

Part of the Header Consistency Project
(http://lists.qt-project.org/pipermail/development/2012-October/007570.html)

Change-Id: I1fbc43a1aa91d996aa61869fcd8d05186bf7cf6d
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Reviewed-by: Stephen Kelly <stephen.kelly@kdab.com>
2012-11-06 18:20:06 +01:00

1358 lines
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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qmediaplayer.h"
#include "qvideosurfaceoutput_p.h"
#include "qmediaobject_p.h"
#include <qmediaservice.h>
#include <qmediaplayercontrol.h>
#include <qmediaserviceprovider_p.h>
#include <qmediaplaylist.h>
#include <qmediaplaylistcontrol_p.h>
#include <qmediaplaylistsourcecontrol_p.h>
#include <qmedianetworkaccesscontrol.h>
#include <QtCore/qcoreevent.h>
#include <QtCore/qmetaobject.h>
#include <QtCore/qtimer.h>
#include <QtCore/qdebug.h>
#include <QtCore/qpointer.h>
QT_BEGIN_NAMESPACE
/*!
\class QMediaPlayer
\brief The QMediaPlayer class allows the playing of a media source.
\inmodule QtMultimedia
\ingroup multimedia
\ingroup multimedia_playback
The QMediaPlayer class is a high level media playback class. It can be used
to playback such content as songs, movies and internet radio. The content
to playback is specified as a QMediaContent object, which can be thought of as a
main or canonical URL with additional information attached. When provided
with a QMediaContent playback may be able to commence.
\snippet doc/src/snippets/multimedia-snippets/media.cpp Player
QVideoWidget can be used with QMediaPlayer for video rendering and QMediaPlaylist
for accessing playlist functionality.
\snippet doc/src/snippets/multimedia-snippets/media.cpp Movie playlist
Since QMediaPlayer is a QMediaObject, you can use several of the QMediaObject
functions for things like:
\list
\li Accessing the currently playing media's metadata (\l {QMediaObject::metaData()} and \l {QMediaMetaData}{predefined meta-data keys})
\li Checking to see if the media playback service is currently available (\l {QMediaObject::availability()})
\endlist
\sa QMediaObject, QMediaService, QVideoWidget, QMediaPlaylist
*/
namespace
{
class MediaPlayerRegisterMetaTypes
{
public:
MediaPlayerRegisterMetaTypes()
{
qRegisterMetaType<QMediaPlayer::State>("QMediaPlayer::State");
qRegisterMetaType<QMediaPlayer::MediaStatus>("QMediaPlayer::MediaStatus");
qRegisterMetaType<QMediaPlayer::Error>("QMediaPlayer::Error");
}
} _registerPlayerMetaTypes;
}
#define MAX_NESTED_PLAYLISTS 16
class QMediaPlayerPrivate : public QMediaObjectPrivate
{
Q_DECLARE_NON_CONST_PUBLIC(QMediaPlayer)
public:
QMediaPlayerPrivate()
: provider(0)
, control(0)
, state(QMediaPlayer::StoppedState)
, error(QMediaPlayer::NoError)
, playlist(0)
, networkAccessControl(0)
, nestedPlaylists(0)
{}
QMediaServiceProvider *provider;
QMediaPlayerControl* control;
QMediaPlayer::State state;
QMediaPlayer::Error error;
QString errorString;
QPointer<QObject> videoOutput;
QMediaPlaylist *playlist;
QMediaNetworkAccessControl *networkAccessControl;
QVideoSurfaceOutput surfaceOutput;
QMediaContent rootMedia;
QMediaContent pendingPlaylist;
QMediaPlaylist *parentPlaylist(QMediaPlaylist *pls);
bool isInChain(QUrl url);
int nestedPlaylists;
void setPlaylist(QMediaPlaylist *playlist);
void setPlaylistMedia();
void loadPlaylist();
void disconnectPlaylist();
void connectPlaylist();
void _q_stateChanged(QMediaPlayer::State state);
void _q_mediaStatusChanged(QMediaPlayer::MediaStatus status);
void _q_error(int error, const QString &errorString);
void _q_updateMedia(const QMediaContent&);
void _q_playlistDestroyed();
void _q_handlePlaylistLoaded();
void _q_handlePlaylistLoadFailed();
};
QMediaPlaylist *QMediaPlayerPrivate::parentPlaylist(QMediaPlaylist *pls)
{
// This function finds a parent playlist for an item in the active chain of playlists.
// Every item in the chain comes from currentMedia() of its parent.
// We don't need to travers the whole tree of playlists,
// but only the subtree of active ones.
for (QMediaPlaylist *current = rootMedia.playlist(); current && current != pls; current = current->currentMedia().playlist())
if (current->currentMedia().playlist() == pls)
return current;
return 0;
}
bool QMediaPlayerPrivate::isInChain(QUrl url)
{
// Check whether a URL is already in the chain of playlists.
// Also see a comment in parentPlaylist().
for (QMediaPlaylist *current = rootMedia.playlist(); current && current != playlist; current = current->currentMedia().playlist())
if (current->currentMedia().canonicalUrl() == url) {
return true;
}
return false;
}
void QMediaPlayerPrivate::_q_stateChanged(QMediaPlayer::State ps)
{
Q_Q(QMediaPlayer);
// Backend switches into stopped state every time new media is about to be loaded.
// If media player has a playlist loaded make sure player doesn' stop.
if (playlist && playlist->currentIndex() != -1 && ps != state && ps == QMediaPlayer::StoppedState) {
if (control->mediaStatus() == QMediaPlayer::EndOfMedia ||
control->mediaStatus() == QMediaPlayer::InvalidMedia) {
// if media player is not stopped, and
// we have finished playback for the current media,
// advance to the next item in the playlist
Q_ASSERT(state != QMediaPlayer::StoppedState);
playlist->next();
return;
} else if (control->mediaStatus() == QMediaPlayer::LoadingMedia) {
return;
}
}
if (ps != state) {
state = ps;
if (ps == QMediaPlayer::PlayingState)
q->addPropertyWatch("position");
else
q->removePropertyWatch("position");
emit q->stateChanged(ps);
}
}
void QMediaPlayerPrivate::_q_mediaStatusChanged(QMediaPlayer::MediaStatus status)
{
Q_Q(QMediaPlayer);
switch (status) {
case QMediaPlayer::StalledMedia:
case QMediaPlayer::BufferingMedia:
q->addPropertyWatch("bufferStatus");
emit q->mediaStatusChanged(status);
break;
default:
q->removePropertyWatch("bufferStatus");
emit q->mediaStatusChanged(status);
break;
}
}
void QMediaPlayerPrivate::_q_error(int error, const QString &errorString)
{
Q_Q(QMediaPlayer);
if (error == int(QMediaPlayer::MediaIsPlaylist)) {
loadPlaylist();
} else {
this->error = QMediaPlayer::Error(error);
this->errorString = errorString;
emit q->error(this->error);
if (playlist)
playlist->next();
}
}
void QMediaPlayerPrivate::_q_updateMedia(const QMediaContent &media)
{
Q_Q(QMediaPlayer);
if (!control)
return;
// check if the current playlist is a top-level playlist
Q_ASSERT(playlist);
if (media.isNull() && playlist != rootMedia.playlist()) {
// switch back to parent playlist
QMediaPlaylist *pls = parentPlaylist(playlist);
Q_ASSERT(pls);
disconnectPlaylist();
playlist = pls;
connectPlaylist();
Q_ASSERT(!pendingPlaylist.playlist());
nestedPlaylists--;
Q_ASSERT(nestedPlaylists >= 0);
playlist->next();
return;
}
if (media.playlist()) {
if (nestedPlaylists < MAX_NESTED_PLAYLISTS) {
nestedPlaylists++;
Q_ASSERT(!pendingPlaylist.playlist());
// disconnect current playlist
disconnectPlaylist();
// new playlist signals are connected
// in the call to setPlaylist() in _q_handlePlaylistLoaded()
playlist = media.playlist();
emit q->currentMediaChanged(media);
_q_handlePlaylistLoaded();
return;
} else if (playlist) {
playlist->next();
}
return;
}
const QMediaPlayer::State currentState = state;
control->setMedia(media, 0);
if (!media.isNull()) {
switch (currentState) {
case QMediaPlayer::PlayingState:
control->play();
break;
case QMediaPlayer::PausedState:
control->pause();
break;
default:
break;
}
}
_q_stateChanged(control->state());
}
void QMediaPlayerPrivate::_q_playlistDestroyed()
{
playlist = 0;
if (!control)
return;
control->setMedia(QMediaContent(), 0);
}
void QMediaPlayerPrivate::setPlaylist(QMediaPlaylist *pls)
{
disconnectPlaylist();
playlist = pls;
setPlaylistMedia();
}
void QMediaPlayerPrivate::setPlaylistMedia()
{
// This function loads current playlist media into backend.
// If current media is a playlist, the function recursively
// loads media from the playlist.
// It also makes sure the correct playlist signals are connected.
Q_Q(QMediaPlayer);
if (playlist) {
connectPlaylist();
if (playlist->currentMedia().playlist()) {
if (nestedPlaylists < MAX_NESTED_PLAYLISTS) {
emit q->currentMediaChanged(playlist->currentMedia());
// rewind nested playlist to start
playlist->currentMedia().playlist()->setCurrentIndex(0);
nestedPlaylists++;
setPlaylist(playlist->currentMedia().playlist());
} else {
playlist->next();
}
return;
} else if (control != 0) {
// If we've just switched to a new playlist,
// then last emited currentMediaChanged was a playlist.
// Make sure we emit currentMediaChanged if new playlist has
// the same media as the previous one:
// sample.m3u
// test.wav -- processed by backend
// nested.m3u -- processed by frontend
// test.wav -- processed by backend,
// media is not changed,
// frontend needs to emit currentMediaChanged
bool isSameMedia = (control->media() == playlist->currentMedia());
control->setMedia(playlist->currentMedia(), 0);
if (isSameMedia) {
emit q->currentMediaChanged(control->media());
}
}
} else {
q->setMedia(QMediaContent(), 0);
}
}
void QMediaPlayerPrivate::loadPlaylist()
{
Q_Q(QMediaPlayer);
Q_ASSERT(pendingPlaylist.isNull());
// Do not load a playlist if there are more than MAX_NESTED_PLAYLISTS in the chain already,
// or if the playlist URL is already in the chain, i.e. do not allow recursive playlists and loops.
if (nestedPlaylists < MAX_NESTED_PLAYLISTS && !q->currentMedia().canonicalUrl().isEmpty() && !isInChain(q->currentMedia().canonicalUrl())) {
pendingPlaylist = QMediaContent(new QMediaPlaylist, q->currentMedia().canonicalUrl(), true);
QObject::connect(pendingPlaylist.playlist(), SIGNAL(loaded()), q, SLOT(_q_handlePlaylistLoaded()));
QObject::connect(pendingPlaylist.playlist(), SIGNAL(loadFailed()), q, SLOT(_q_handlePlaylistLoadFailed()));
pendingPlaylist.playlist()->load(pendingPlaylist.canonicalRequest());
} else if (playlist) {
playlist->next();
}
}
void QMediaPlayerPrivate::disconnectPlaylist()
{
Q_Q(QMediaPlayer);
if (playlist) {
QObject::disconnect(playlist, SIGNAL(currentMediaChanged(QMediaContent)),
q, SLOT(_q_updateMedia(QMediaContent)));
QObject::disconnect(playlist, SIGNAL(destroyed()), q, SLOT(_q_playlistDestroyed()));
}
}
void QMediaPlayerPrivate::connectPlaylist()
{
Q_Q(QMediaPlayer);
if (playlist) {
QObject::connect(playlist, SIGNAL(currentMediaChanged(QMediaContent)),
q, SLOT(_q_updateMedia(QMediaContent)));
QObject::connect(playlist, SIGNAL(destroyed()), q, SLOT(_q_playlistDestroyed()));
}
}
void QMediaPlayerPrivate::_q_handlePlaylistLoaded()
{
Q_Q(QMediaPlayer);
if (pendingPlaylist.playlist()) {
Q_ASSERT(!q->currentMedia().playlist());
// if there is an active playlist
if (playlist) {
Q_ASSERT(playlist->currentIndex() >= 0);
disconnectPlaylist();
playlist->insertMedia(playlist->currentIndex() + 1, pendingPlaylist);
playlist->removeMedia(playlist->currentIndex());
nestedPlaylists++;
} else {
Q_ASSERT(!rootMedia.playlist());
rootMedia = pendingPlaylist;
emit q->mediaChanged(rootMedia);
}
playlist = pendingPlaylist.playlist();
emit q->currentMediaChanged(pendingPlaylist);
}
pendingPlaylist = QMediaContent();
playlist->next();
setPlaylistMedia();
switch (state) {
case QMediaPlayer::PausedState:
control->pause();
break;
case QMediaPlayer::PlayingState:
control->play();
break;
case QMediaPlayer::StoppedState:
break;
}
}
void QMediaPlayerPrivate::_q_handlePlaylistLoadFailed()
{
pendingPlaylist = QMediaContent();
if (!control)
return;
if (playlist)
playlist->next();
else
control->setMedia(QMediaContent(), 0);
}
static QMediaService *playerService(QMediaPlayer::Flags flags)
{
QMediaServiceProvider *provider = QMediaServiceProvider::defaultServiceProvider();
if (flags) {
QMediaServiceProviderHint::Features features = 0;
if (flags & QMediaPlayer::LowLatency)
features |= QMediaServiceProviderHint::LowLatencyPlayback;
if (flags & QMediaPlayer::StreamPlayback)
features |= QMediaServiceProviderHint::StreamPlayback;
if (flags & QMediaPlayer::VideoSurface)
features |= QMediaServiceProviderHint::VideoSurface;
return provider->requestService(Q_MEDIASERVICE_MEDIAPLAYER,
QMediaServiceProviderHint(features));
} else
return provider->requestService(Q_MEDIASERVICE_MEDIAPLAYER);
}
/*!
Construct a QMediaPlayer instance
parented to \a parent and with \a flags.
*/
QMediaPlayer::QMediaPlayer(QObject *parent, QMediaPlayer::Flags flags):
QMediaObject(*new QMediaPlayerPrivate,
parent,
playerService(flags))
{
Q_D(QMediaPlayer);
d->provider = QMediaServiceProvider::defaultServiceProvider();
if (d->service == 0) {
d->error = ServiceMissingError;
} else {
d->control = qobject_cast<QMediaPlayerControl*>(d->service->requestControl(QMediaPlayerControl_iid));
d->networkAccessControl = qobject_cast<QMediaNetworkAccessControl*>(d->service->requestControl(QMediaNetworkAccessControl_iid));
if (d->control != 0) {
connect(d->control, SIGNAL(mediaChanged(QMediaContent)), SIGNAL(currentMediaChanged(QMediaContent)));
connect(d->control, SIGNAL(stateChanged(QMediaPlayer::State)), SLOT(_q_stateChanged(QMediaPlayer::State)));
connect(d->control, SIGNAL(mediaStatusChanged(QMediaPlayer::MediaStatus)),
SLOT(_q_mediaStatusChanged(QMediaPlayer::MediaStatus)));
connect(d->control, SIGNAL(error(int,QString)), SLOT(_q_error(int,QString)));
connect(d->control, SIGNAL(durationChanged(qint64)), SIGNAL(durationChanged(qint64)));
connect(d->control, SIGNAL(positionChanged(qint64)), SIGNAL(positionChanged(qint64)));
connect(d->control, SIGNAL(audioAvailableChanged(bool)), SIGNAL(audioAvailableChanged(bool)));
connect(d->control, SIGNAL(videoAvailableChanged(bool)), SIGNAL(videoAvailableChanged(bool)));
connect(d->control, SIGNAL(volumeChanged(int)), SIGNAL(volumeChanged(int)));
connect(d->control, SIGNAL(mutedChanged(bool)), SIGNAL(mutedChanged(bool)));
connect(d->control, SIGNAL(seekableChanged(bool)), SIGNAL(seekableChanged(bool)));
connect(d->control, SIGNAL(playbackRateChanged(qreal)), SIGNAL(playbackRateChanged(qreal)));
connect(d->control, SIGNAL(bufferStatusChanged(int)), SIGNAL(bufferStatusChanged(int)));
if (d->control->state() == PlayingState)
addPropertyWatch("position");
if (d->control->mediaStatus() == StalledMedia || d->control->mediaStatus() == BufferingMedia)
addPropertyWatch("bufferStatus");
}
if (d->networkAccessControl != 0) {
connect(d->networkAccessControl, SIGNAL(configurationChanged(QNetworkConfiguration)),
this, SIGNAL(networkConfigurationChanged(QNetworkConfiguration)));
}
}
}
/*!
Destroys the player object.
*/
QMediaPlayer::~QMediaPlayer()
{
Q_D(QMediaPlayer);
if (d->service) {
if (d->control)
d->service->releaseControl(d->control);
d->provider->releaseService(d->service);
}
}
QMediaContent QMediaPlayer::media() const
{
Q_D(const QMediaPlayer);
return d->rootMedia;
}
/*!
Returns the stream source of media data.
This is only valid if a stream was passed to setMedia().
\sa setMedia()
*/
const QIODevice *QMediaPlayer::mediaStream() const
{
Q_D(const QMediaPlayer);
if (d->control != 0)
return d->control->mediaStream();
return 0;
}
QMediaPlaylist *QMediaPlayer::playlist() const
{
Q_D(const QMediaPlayer);
return d->rootMedia.playlist();
}
QMediaContent QMediaPlayer::currentMedia() const
{
Q_D(const QMediaPlayer);
if (d->control != 0)
return d->control->media();
return QMediaContent();
}
void QMediaPlayer::setPlaylist(QMediaPlaylist *playlist)
{
QMediaContent m(playlist, QUrl(), false);
setMedia(m);
}
/*!
Sets the network access points for remote media playback.
\a configurations contains, in ascending preferential order, a list of
configuration that can be used for network access.
This will invalidate the choice of previous configurations.
*/
void QMediaPlayer::setNetworkConfigurations(const QList<QNetworkConfiguration> &configurations)
{
Q_D(QMediaPlayer);
if (d->networkAccessControl)
d->networkAccessControl->setConfigurations(configurations);
}
QMediaPlayer::State QMediaPlayer::state() const
{
return d_func()->state;
}
QMediaPlayer::MediaStatus QMediaPlayer::mediaStatus() const
{
Q_D(const QMediaPlayer);
if (d->control != 0)
return d->control->mediaStatus();
return QMediaPlayer::UnknownMediaStatus;
}
qint64 QMediaPlayer::duration() const
{
Q_D(const QMediaPlayer);
if (d->control != 0)
return d->control->duration();
return -1;
}
qint64 QMediaPlayer::position() const
{
Q_D(const QMediaPlayer);
if (d->control != 0)
return d->control->position();
return 0;
}
int QMediaPlayer::volume() const
{
Q_D(const QMediaPlayer);
if (d->control != 0)
return d->control->volume();
return 0;
}
bool QMediaPlayer::isMuted() const
{
Q_D(const QMediaPlayer);
if (d->control != 0)
return d->control->isMuted();
return false;
}
int QMediaPlayer::bufferStatus() const
{
Q_D(const QMediaPlayer);
if (d->control != 0)
return d->control->bufferStatus();
return 0;
}
bool QMediaPlayer::isAudioAvailable() const
{
Q_D(const QMediaPlayer);
if (d->control != 0)
return d->control->isAudioAvailable();
return false;
}
bool QMediaPlayer::isVideoAvailable() const
{
Q_D(const QMediaPlayer);
if (d->control != 0)
return d->control->isVideoAvailable();
return false;
}
bool QMediaPlayer::isSeekable() const
{
Q_D(const QMediaPlayer);
if (d->control != 0)
return d->control->isSeekable();
return false;
}
qreal QMediaPlayer::playbackRate() const
{
Q_D(const QMediaPlayer);
if (d->control != 0)
return d->control->playbackRate();
return 0.0;
}
/*!
Returns the current error state.
*/
QMediaPlayer::Error QMediaPlayer::error() const
{
return d_func()->error;
}
QString QMediaPlayer::errorString() const
{
return d_func()->errorString;
}
/*!
Returns the current network access point in use.
If a default contructed QNetworkConfiguration is returned
this feature is not available or that none of the
current supplied configurations are in use.
*/
QNetworkConfiguration QMediaPlayer::currentNetworkConfiguration() const
{
Q_D(const QMediaPlayer);
if (d->networkAccessControl)
return d_func()->networkAccessControl->currentConfiguration();
return QNetworkConfiguration();
}
//public Q_SLOTS:
/*!
Start or resume playing the current source.
*/
void QMediaPlayer::play()
{
Q_D(QMediaPlayer);
if (d->control == 0) {
QMetaObject::invokeMethod(this, "_q_error", Qt::QueuedConnection,
Q_ARG(int, QMediaPlayer::ServiceMissingError),
Q_ARG(QString, tr("The QMediaPlayer object does not have a valid service")));
return;
}
//if playlist control is available, the service should advance itself
if (d->rootMedia.playlist() && d->rootMedia.playlist()->currentIndex() == -1 && !d->rootMedia.playlist()->isEmpty()) {
// switch to playing state
if (d->state != QMediaPlayer::PlayingState)
d->_q_stateChanged(QMediaPlayer::PlayingState);
if (d->playlist != d->rootMedia.playlist())
d->setPlaylist(d->rootMedia.playlist());
Q_ASSERT(d->playlist == d->rootMedia.playlist());
emit currentMediaChanged(d->rootMedia);
d->playlist->setCurrentIndex(0);
}
// Reset error conditions
d->error = NoError;
d->errorString = QString();
d->control->play();
}
/*!
Pause playing the current source.
*/
void QMediaPlayer::pause()
{
Q_D(QMediaPlayer);
if (d->control != 0)
d->control->pause();
}
/*!
Stop playing, and reset the play position to the beginning.
*/
void QMediaPlayer::stop()
{
Q_D(QMediaPlayer);
if (d->control != 0)
d->control->stop();
// If media player didn't stop in response to control.
// This happens if we have an active playlist and control
// media status is
// QMediaPlayer::LoadingMedia, QMediaPlayer::InvalidMedia, or QMediaPlayer::EndOfMedia
// see QMediaPlayerPrivate::_q_stateChanged()
if (d->playlist && d->state != QMediaPlayer::StoppedState) {
d->state = QMediaPlayer::StoppedState;
removePropertyWatch("position");
emit stateChanged(QMediaPlayer::StoppedState);
}
}
void QMediaPlayer::setPosition(qint64 position)
{
Q_D(QMediaPlayer);
if (d->control == 0)
return;
d->control->setPosition(qMax(position, 0ll));
}
void QMediaPlayer::setVolume(int v)
{
Q_D(QMediaPlayer);
if (d->control == 0)
return;
int clamped = qBound(0, v, 100);
if (clamped == volume())
return;
d->control->setVolume(clamped);
}
void QMediaPlayer::setMuted(bool muted)
{
Q_D(QMediaPlayer);
if (d->control == 0 || muted == isMuted())
return;
d->control->setMuted(muted);
}
void QMediaPlayer::setPlaybackRate(qreal rate)
{
Q_D(QMediaPlayer);
if (d->control != 0)
d->control->setPlaybackRate(rate);
}
/*!
Sets the current \a media source.
If a \a stream is supplied; media data will be read from it instead of resolving the media
source. In this case the media source may still be used to resolve additional information
about the media such as mime type.
Setting the media to a null QMediaContent will cause the player to discard all
information relating to the current media source and to cease all I/O operations related
to that media.
*/
void QMediaPlayer::setMedia(const QMediaContent &media, QIODevice *stream)
{
Q_D(QMediaPlayer);
stop();
QMediaContent oldMedia = d->rootMedia;
d->disconnectPlaylist();
d->playlist = 0;
d->rootMedia = media;
d->nestedPlaylists = 0;
if (oldMedia != media)
emit mediaChanged(d->rootMedia);
if (media.playlist()) {
// reset playlist to the 1st item
media.playlist()->setCurrentIndex(0);
d->setPlaylist(media.playlist());
} else if (d->control != 0) {
d->control->setMedia(media, stream);
}
}
/*!
\internal
*/
bool QMediaPlayer::bind(QObject *obj)
{
return QMediaObject::bind(obj);
}
/*!
\internal
*/
void QMediaPlayer::unbind(QObject *obj)
{
QMediaObject::unbind(obj);
}
/*!
Returns the level of support a media player has for a \a mimeType and a set of \a codecs.
The \a flags argument allows additional requirements such as performance indicators to be
specified.
*/
QMultimedia::SupportEstimate QMediaPlayer::hasSupport(const QString &mimeType,
const QStringList& codecs,
Flags flags)
{
return QMediaServiceProvider::defaultServiceProvider()->hasSupport(QByteArray(Q_MEDIASERVICE_MEDIAPLAYER),
mimeType,
codecs,
flags);
}
/*!
\deprecated
Returns a list of MIME types supported by the media player.
The \a flags argument causes the resultant list to be restricted to MIME types which can be supported
given additional requirements, such as performance indicators.
This function may not return useful results on some platforms, and support for a specific file of a
given mime type is not guaranteed even if the mime type is in general supported. In addition, in some
cases this function will need to load all available media plugins and query them for their support, which
may take some time.
*/
QStringList QMediaPlayer::supportedMimeTypes(Flags flags)
{
return QMediaServiceProvider::defaultServiceProvider()->supportedMimeTypes(QByteArray(Q_MEDIASERVICE_MEDIAPLAYER),
flags);
}
/*!
\fn void QMediaPlayer::setVideoOutput(QVideoWidget* output)
Attach a QVideoWidget video \a output to the media player.
If the media player has already video output attached,
it will be replaced with a new one.
*/
void QMediaPlayer::setVideoOutput(QVideoWidget *output)
{
Q_D(QMediaPlayer);
if (d->videoOutput)
unbind(d->videoOutput);
// We don't know (in this library) that QVideoWidget inherits QObject
QObject *outputObject = reinterpret_cast<QObject*>(output);
d->videoOutput = outputObject && bind(outputObject) ? outputObject : 0;
}
/*!
\fn void QMediaPlayer::setVideoOutput(QGraphicsVideoItem* output)
Attach a QGraphicsVideoItem video \a output to the media player.
If the media player has already video output attached,
it will be replaced with a new one.
*/
void QMediaPlayer::setVideoOutput(QGraphicsVideoItem *output)
{
Q_D(QMediaPlayer);
if (d->videoOutput)
unbind(d->videoOutput);
// We don't know (in this library) that QGraphicsVideoItem (multiply) inherits QObject
// but QObject inheritance depends on QObject coming first, so try this out.
QObject *outputObject = reinterpret_cast<QObject*>(output);
d->videoOutput = outputObject && bind(outputObject) ? outputObject : 0;
}
/*!
Sets a video \a surface as the video output of a media player.
If a video output has already been set on the media player the new surface
will replace it.
*/
void QMediaPlayer::setVideoOutput(QAbstractVideoSurface *surface)
{
Q_D(QMediaPlayer);
d->surfaceOutput.setVideoSurface(surface);
if (d->videoOutput != &d->surfaceOutput) {
if (d->videoOutput)
unbind(d->videoOutput);
d->videoOutput = 0;
if (surface && bind(&d->surfaceOutput))
d->videoOutput = &d->surfaceOutput;
} else if (!surface) {
//unbind the surfaceOutput if null surface is set
unbind(&d->surfaceOutput);
d->videoOutput = 0;
}
}
/*! \reimp */
QMultimedia::AvailabilityStatus QMediaPlayer::availability() const
{
Q_D(const QMediaPlayer);
if (!d->control)
return QMultimedia::ServiceMissing;
return QMediaObject::availability();
}
// Enums
/*!
\enum QMediaPlayer::State
Defines the current state of a media player.
\value StoppedState The media player is not playing content, playback will begin from the start
of the current track.
\value PlayingState The media player is currently playing content.
\value PausedState The media player has paused playback, playback of the current track will
resume from the position the player was paused at.
*/
/*!
\enum QMediaPlayer::MediaStatus
Defines the status of a media player's current media.
\value UnknownMediaStatus The status of the media cannot be determined.
\value NoMedia The is no current media. The player is in the StoppedState.
\value LoadingMedia The current media is being loaded. The player may be in any state.
\value LoadedMedia The current media has been loaded. The player is in the StoppedState.
\value StalledMedia Playback of the current media has stalled due to insufficient buffering or
some other temporary interruption. The player is in the PlayingState or PausedState.
\value BufferingMedia The player is buffering data but has enough data buffered for playback to
continue for the immediate future. The player is in the PlayingState or PausedState.
\value BufferedMedia The player has fully buffered the current media. The player is in the
PlayingState or PausedState.
\value EndOfMedia Playback has reached the end of the current media. The player is in the
StoppedState.
\value InvalidMedia The current media cannot be played. The player is in the StoppedState.
*/
/*!
\enum QMediaPlayer::Error
Defines a media player error condition.
\value NoError No error has occurred.
\value ResourceError A media resource couldn't be resolved.
\value FormatError The format of a media resource isn't (fully) supported. Playback may still
be possible, but without an audio or video component.
\value NetworkError A network error occurred.
\value AccessDeniedError There are not the appropriate permissions to play a media resource.
\value ServiceMissingError A valid playback service was not found, playback cannot proceed.
\omitvalue MediaIsPlaylist
*/
// Signals
/*!
\fn QMediaPlayer::error(QMediaPlayer::Error error)
Signals that an \a error condition has occurred.
\sa errorString()
*/
/*!
\fn void QMediaPlayer::stateChanged(State state)
Signal the \a state of the Player object has changed.
*/
/*!
\fn QMediaPlayer::mediaStatusChanged(QMediaPlayer::MediaStatus status)
Signals that the \a status of the current media has changed.
\sa mediaStatus()
*/
/*!
\fn void QMediaPlayer::mediaChanged(const QMediaContent &media);
Signals that the media source has been changed to \a media.
\sa media(), currentMediaChanged()
*/
/*!
\fn void QMediaPlayer::currentMediaChanged(const QMediaContent &media);
Signals that the current playing content has been changed to \a media.
\sa currentMedia(), mediaChanged()
*/
/*!
\fn void QMediaPlayer::playbackRateChanged(qreal rate);
Signals the playbackRate has changed to \a rate.
*/
/*!
\fn void QMediaPlayer::seekableChanged(bool seekable);
Signals the \a seekable status of the player object has changed.
*/
// Properties
/*!
\property QMediaPlayer::state
\brief the media player's playback state.
By default this property is QMediaPlayer::Stopped
\sa mediaStatus(), play(), pause(), stop()
*/
/*!
\property QMediaPlayer::error
\brief a string describing the last error condition.
\sa error()
*/
/*!
\property QMediaPlayer::media
\brief the active media source being used by the player object.
The player object will use the QMediaContent for selection of the content to
be played.
By default this property has a null QMediaContent.
Setting this property to a null QMediaContent will cause the player to discard all
information relating to the current media source and to cease all I/O operations related
to that media.
\sa QMediaContent, currentMedia()
*/
/*!
\property QMediaPlayer::currentMedia
\brief the current active media content being played by the player object.
This value could be different from QMediaPlayer::media property if a playlist is used.
In this case currentMedia indicates the current media content being processed
by the player, while QMediaPlayer::media property contains the original playlist.
\sa QMediaContent, media()
*/
/*!
\property QMediaPlayer::playlist
\brief the media playlist being used by the player object.
The player object will use the current playlist item for selection of the content to
be played.
By default this property is set to null.
If the media playlist is used as a source, QMediaPlayer::currentMedia is updated with
a current playlist item. The current source should be selected with
QMediaPlaylist::setCurrentIndex(int) instead of QMediaPlayer::setMedia(),
otherwise the current playlist will be discarded.
\sa QMediaContent
*/
/*!
\property QMediaPlayer::mediaStatus
\brief the status of the current media stream.
The stream status describes how the playback of the current stream is
progressing.
By default this property is QMediaPlayer::NoMedia
\sa state
*/
/*!
\property QMediaPlayer::duration
\brief the duration of the current media.
The value is the total playback time in milliseconds of the current media.
The value may change across the life time of the QMediaPlayer object and
may not be available when initial playback begins, connect to the
durationChanged() signal to receive status notifications.
*/
/*!
\property QMediaPlayer::position
\brief the playback position of the current media.
The value is the current playback position, expressed in milliseconds since
the beginning of the media. Periodically changes in the position will be
indicated with the signal positionChanged(), the interval between updates
can be set with QMediaObject's method setNotifyInterval().
*/
/*!
\property QMediaPlayer::volume
\brief the current playback volume.
The playback volume is a linear in effect and the value can range from 0 -
100, values outside this range will be clamped.
*/
/*!
\property QMediaPlayer::muted
\brief the muted state of the current media.
The value will be true if the playback volume is muted; otherwise false.
*/
/*!
\property QMediaPlayer::bufferStatus
\brief the percentage of the temporary buffer filled before playback begins.
When the player object is buffering; this property holds the percentage of
the temporary buffer that is filled. The buffer will need to reach 100%
filled before playback can resume, at which time the MediaStatus will be
BufferedMedia.
\sa mediaStatus()
*/
/*!
\property QMediaPlayer::audioAvailable
\brief the audio availabilty status for the current media.
As the life time of QMediaPlayer can be longer than the playback of one
QMediaContent, this property may change over time, the
audioAvailableChanged signal can be used to monitor it's status.
*/
/*!
\property QMediaPlayer::videoAvailable
\brief the video availability status for the current media.
If available, the QVideoWidget class can be used to view the video. As the
life time of QMediaPlayer can be longer than the playback of one
QMediaContent, this property may change over time, the
videoAvailableChanged signal can be used to monitor it's status.
\sa QVideoWidget, QMediaContent
*/
/*!
\property QMediaPlayer::seekable
\brief the seek-able status of the current media
If seeking is supported this property will be true; false otherwise. The
status of this property may change across the life time of the QMediaPlayer
object, use the seekableChanged signal to monitor changes.
*/
/*!
\property QMediaPlayer::playbackRate
\brief the playback rate of the current media.
This value is a multiplier applied to the media's standard play rate. By
default this value is 1.0, indicating that the media is playing at the
standard pace. Values higher than 1.0 will increase the rate of play.
Values less than zero can be set and indicate the media will rewind at the
multiplier of the standard pace.
Not all playback services support change of the playback rate. It is
framework defined as to the status and quality of audio and video
while fast forwarding or rewinding.
*/
/*!
\fn void QMediaPlayer::durationChanged(qint64 duration)
Signal the duration of the content has changed to \a duration, expressed in milliseconds.
*/
/*!
\fn void QMediaPlayer::positionChanged(qint64 position)
Signal the position of the content has changed to \a position, expressed in
milliseconds.
*/
/*!
\fn void QMediaPlayer::volumeChanged(int volume)
Signal the playback volume has changed to \a volume.
*/
/*!
\fn void QMediaPlayer::mutedChanged(bool muted)
Signal the mute state has changed to \a muted.
*/
/*!
\fn void QMediaPlayer::videoAvailableChanged(bool videoAvailable)
Signal the availability of visual content has changed to \a videoAvailable.
*/
/*!
\fn void QMediaPlayer::audioAvailableChanged(bool available)
Signals the availability of audio content has changed to \a available.
*/
/*!
\fn void QMediaPlayer::bufferStatusChanged(int percentFilled)
Signal the amount of the local buffer filled as a percentage by \a percentFilled.
*/
/*!
\fn void QMediaPlayer::networkConfigurationChanged(const QNetworkConfiguration &configuration)
Signal that the active in use network access point has been changed to \a configuration and all subsequent network access will use this \a configuration.
*/
/*!
\enum QMediaPlayer::Flag
\value LowLatency The player is expected to be used with simple audio formats,
but playback should start without significant delay.
Such playback service can be used for beeps, ringtones, etc.
\value StreamPlayback The player is expected to play QIODevice based streams.
If passed to QMediaPlayer constructor, the service supporting
streams playback will be chosen.
\value VideoSurface The player is expected to be able to render to a
QAbstractVideoSurface \l {setVideoOutput()}{output}.
*/
#include "moc_qmediaplayer.cpp"
QT_END_NAMESPACE
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