The QMediaGaplessPlaybackControl class provides access to the gapless playback related control of a QMediaService . 更多...
| 头： | #include <QMediaGaplessPlaybackControl> |
| qmake: | QT += multimedia |
| 继承： | QMediaControl |
该类已过时。 提供它是为使旧源代码能继续工作。强烈建议不要在新代码中使用它。
| virtual | ~QMediaGaplessPlaybackControl () |
| virtual qreal | crossfadeTime () const = 0 |
| virtual bool | isCrossfadeSupported () const = 0 |
| virtual QMediaContent | nextMedia () const = 0 |
| virtual void | setCrossfadeTime (qreal crossfadeTime ) = 0 |
| virtual void | setNextMedia (const QMediaContent & media ) = 0 |
| void | advancedToNextMedia () |
| void | crossfadeTimeChanged (qreal crossfadeTime ) |
| void | nextMediaChanged (const QMediaContent & media ) |
| QMediaGaplessPlaybackControl (QObject * parent = nullptr) |
| QMediaGaplessPlaybackControl_iid |
若 QMediaService supports gapless playback it will implement QMediaGaplessPlaybackControl. This control provides a means to set the next media or crossfade time for smooth transitions between tracks.
The functionality provided by this control is exposed to application code through the QMediaPlayer 类。
The interface name of QMediaGaplessPlaybackControl is
org.qt-project.qt.mediagaplessplaybackcontrol/5.0
作为定义在
QMediaGaplessPlaybackControl_iid
.
另请参阅 QMediaService::requestControl () 和 QMediaPlayer .
[protected]
QMediaGaplessPlaybackControl::
QMediaGaplessPlaybackControl
(
QObject
*
parent
= nullptr)
Constructs a new gapless playback control with the given parent .
[signal]
void
QMediaGaplessPlaybackControl::
advancedToNextMedia
()
Signals when the player advances to the next media (the content of next media will be cleared).
另请参阅 nextMedia ().
[signal]
void
QMediaGaplessPlaybackControl::
crossfadeTimeChanged
(
qreal
crossfadeTime
)
信号 crossfadeTime 已改变。
另请参阅 crossfadeTime ().
[signal]
void
QMediaGaplessPlaybackControl::
nextMediaChanged
(const
QMediaContent
&
media
)
Signals that the next media has changed (either explicitly via setNextMedia () or when the player clears the next media while advancing to it).
另请参阅 nextMedia ().
[虚拟]
QMediaGaplessPlaybackControl::
~QMediaGaplessPlaybackControl
()
Destroys a gapless playback control.
[pure virtual]
qreal
QMediaGaplessPlaybackControl::
crossfadeTime
() const
Returns current crossfade time in seconds.
另请参阅 setCrossfadeTime ().
[pure virtual]
bool
QMediaGaplessPlaybackControl::
isCrossfadeSupported
() const
Indicates whether crossfading is supported or not. If crossfading is not supported, setCrossfadeTime () will be ignored and crossfadeTime () will always return 0.
[pure virtual]
QMediaContent
QMediaGaplessPlaybackControl::
nextMedia
() const
Returns the content of the next media
另请参阅 setNextMedia ().
[pure virtual]
void
QMediaGaplessPlaybackControl::
setCrossfadeTime
(
qreal
crossfadeTime
)
设置 crossfadeTime in seconds for smooth transition.
Positive value means how much time it will take for the next media to transit from silent to full volume and vice versa for current one. So both current and the next one will be playing during this period of time.
A crossfade time of zero or negative will result in gapless playback (suitable for some continuous media).
另请参阅 crossfadeTime ().
[pure virtual]
void
QMediaGaplessPlaybackControl::
setNextMedia
(const
QMediaContent
&
media
)
Sets the next media for smooth transition.
另请参阅 nextMedia ().
org.qt-project.qt.mediagaplessplaybackcontrol/5.0
定义接口名为 QMediaGaplessPlaybackControl 类。