QSound Class

The QSound class provides a method to play .wav sound files. More...

Header:	#include <QSound>
qmake:	QT += multimedia
Inherits:	QObject

• List of all members, including inherited members

Public Types

enum	Loop { Infinite }

Public Functions

	QSound(const QString &filename, QObject *parent = nullptr)
virtual	~QSound()
QString	fileName() const
bool	isFinished() const
int	loops() const
int	loopsRemaining() const
void	setLoops(int number)

Public Slots

void	play()
void	stop()

Static Public Members

void	play(const QString &filename)

Detailed Description

Qt provides the most commonly required audio operation in GUI applications: asynchronously playing a sound file. This is most easily accomplished using the static play() function:

QSound::play("mysounds/bells.wav");

Alternatively, create a QSound object from the sound file first and then call the play() slot:

QSound bells("mysounds/bells.wav");
bells.play();

In both cases, the file may either be a local file or in a resource.

Once created a QSound object can be queried for its fileName() and total number of loops() (i.e. the number of times the sound will play). The number of repetitions can be altered using the setLoops() function. While playing the sound, the loopsRemaining() function returns the remaining number of repetitions. Use the isFinished() function to determine whether the sound has finished playing.

Sounds played using a QSound object may use more memory than the static play() function, but it may also play more immediately (depending on the underlying platform audio facilities).

If you require finer control over playing sounds, consider the QSoundEffect or QAudioOutput classes.

See also QSoundEffect.

Member Type Documentation

enum QSound::Loop

Constant	Value	Description
QSound::Infinite	-1	Can be used as a parameter to setLoops() to loop infinitely.

Member Function Documentation

QSound::QSound(const QString &filename, QObject *parent = nullptr)

Constructs a QSound object from the file specified by the given filename and with the given parent.

The file can either be a local file or in a resource.

See also play().

[slot] void QSound::play()

This is an overloaded function.

Starts playing the sound specified by this QSound object.

The function returns immediately. Depending on the platform audio facilities, other sounds may stop or be mixed with the new sound. The sound can be played again at any time, possibly mixing or replacing previous plays of the sound.

See also fileName().

[slot] void QSound::stop()

Stops the sound playing.

See also play().

[virtual] QSound::~QSound()

Destroys this sound object. If the sound is not finished playing, the stop() function is called before the sound object is destroyed.

See also stop() and isFinished().

QString QSound::fileName() const

Returns the filename associated with this QSound object.

See also QSound().

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. Return value of QSound::Infinite indicates infinite number of loops

See also loopsRemaining() and setLoops().

int QSound::loopsRemaining() const

Returns the remaining number of times the sound will loop (for all positive values this value decreases each time the sound is played). Return value of QSound::Infinite indicates infinite number of loops

See also loops() and isFinished().

[static] void QSound::play(const QString &filename)

Plays the sound stored in the file specified by the given filename.

The file can either be a local file or in a resource.

See also stop(), loopsRemaining(), and isFinished().

void QSound::setLoops(int number)

Sets the sound to repeat the given number of times when it is played.

Note that passing the value QSound::Infinite will cause the sound to loop indefinitely.

See also loops().