Qt Reference Documentation

BackendCapabilities Namespace

(Phonon::BackendCapabilities)

The BackendCapabilities namespace contains functions to describe the capabilities of the multimedia backend. More...

This namespace was introduced in Qt 4.4.

Classes

class Notifier

Functions

QList<EffectDescription> availableAudioEffects ()
QList<AudioOutputDevice> availableAudioOutputDevices ()
QStringList availableMimeTypes ()
bool isMimeTypeAvailable ( const QString & mimeType )
Notifier * notifier ()

Detailed Description

The BackendCapabilities namespace contains functions to describe the capabilities of the multimedia backend.

Classes

class Notifier

Function Documentation

QList<EffectDescription> BackendCapabilities::availableAudioEffects ()

Returns descriptions for the audio effects the backend supports.

Returns A list of AudioEffectDescription objects that give a name and description for every supported audio effect.

QList<AudioOutputDevice> BackendCapabilities::availableAudioOutputDevices ()

Returns the audio output devices the backend supports.

Returns A list of AudioOutputDevice objects that give a name and description for every supported audio output device.

QStringList BackendCapabilities::availableMimeTypes ()

Returns a list of mime types that the Backend can decode.

See also isMimeTypeAvailable().

bool BackendCapabilities::isMimeTypeAvailable ( const QString & mimeType )

Often all you want to know is whether one given MIME type can be decoded by the backend. Use this method in favor of availableMimeTypes() as it can give you a negative answer without having a backend loaded.

Returns true if the given mimeType is supported by the backend; otherwise, returns false.

See also availableMimeTypes().

Notifier * BackendCapabilities::notifier ()

Use this function to get a QObject pointer to connect to the capabilitiesChanged signal.

Returns a pointer to a QObject.

The capabilitiesChanged signal is emitted if the capabilities have changed. This can happen if the user has requested a backend change.

To connect to this signal do the following:

 QObject::connect(BackendCapabilities::notifier(), SIGNAL(capabilitiesChanged()), ...

See also Notifier::capabilitiesChanged().

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