QSound - Access to the platform audio facilities
QSound ( const QString & filename, QObject * parent = 0, const char * name = 0 )
int loops () const
int loopsRemaining () const
void setLoops ( int l )
QString fileName () const
bool isFinished () const
void play ()
void stop ()
Static Public Members
bool isAvailable ()
void play ( const QString & filename )
bool available ()
The QSound class provides access to the platform audio facilities.
Qt provides the most commonly required audio operation in GUI applications: asynchronously
playing a sound file. This is most easily accomplished with a single call:
A second API is provided in which a QSound object is created from a sound file and is
Sounds played using the second model may use more memory but play more immediately than
sounds played using the first model, depending on the underlying platform audio
On Microsoft Windows the underlying multimedia system is used; only WAVE format sound
files are supported.
On X11 the Network Audio System is used if available, otherwise all operations work
silently. NAS supports WAVE and AU files.
On Macintosh, ironically, we use QT (QuickTime) for sound, this means all QuickTime
formats are supported by Qt/Mac.
On Qt/Embedded, a built-in mixing sound server is used, which accesses /dev/dsp directly.
Only the WAVE format is supported.
The availability of sound can be tested with QSound::isAvailable().
See also Multimedia Classes.
MEMBER FUNCTION DOCUMENTATION
QSound::QSound ( const QString & filename, QObject * parent = 0, const char * name = 0 )
Constructs a QSound that can quickly play the sound in a file named filename.
This may use more memory than the static play function.
The parent and name arguments (default 0) are passed on to the QObject constructor.
Destroys the sound object.
bool QSound::available () [static]
Returns TRUE if sound support is available; otherwise returns FALSE.
QString QSound::fileName () const
Returns the filename associated with the sound.
bool QSound::isAvailable () [static]
Returns TRUE if sound facilities exist on the platform; otherwise returns FALSE. An
application may choose either to notify the user if sound is crucial to the application or
to operate silently without bothering the user.
If no sound is available, all QSound operations work silently and quickly.
bool QSound::isFinished () const
Returns TRUE if the sound has finished playing; otherwise returns FALSE.
int QSound::loops () const
Returns the number of times the sound will play.
int QSound::loopsRemaining () const
Returns the number of times the sound will loop. This value decreases each time the sound
This function is not supported on Windows and will always return the total number of
void QSound::play ( const QString & filename ) [static]
Plays the sound in a file called filename.
void QSound::play () [slot]
This is an overloaded member function, provided for convenience. It behaves essentially
like the above function.
Starts the sound playing. The function returns immediately. Depending on the platform
audio facilities, other sounds may stop or may be mixed with the new sound.
The sound can be played again at any time, possibly mixing or replacing previous plays of
void QSound::setLoops ( int l )
Sets the sound to repeat l times when it is played. Passing the value -1 will cause the
sound to loop indefinitely.
On Windows, sounds with a loop count different from 1 will always loop indefinitely.
See also loops().
void QSound::stop () [slot]
Stops the sound playing.
See also play().
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Trolltech AS 9 December 2002 QSound(3qt)