Home · All Namespaces · All Classes · Grouped Classes · Modules · Functions

QMediaDecoder Class Reference
[QtMediaModule]

The QMediaDecoder class is an abstraction for decoders written for the Media Engine. More...

    #include <QMediaDecoder>

This class is under development and is subject to change.

Inherits QMediaDevice.

• List of all members, including inherited members

Public Functions

• virtual ~QMediaDecoder ()
• virtual bool isMuted () = 0
• virtual quint64 length () = 0
• virtual void pause () = 0
• virtual bool seek ( qint64 ms ) = 0
• virtual void setMuted ( bool mute ) = 0
• virtual void setVolume ( int volume ) = 0
• virtual void start () = 0
• virtual void stop () = 0
• virtual int volume () = 0

• 3 public functions inherited from QMediaDevice
• 32 public functions inherited from QIODevice
• 29 public functions inherited from QObject

Signals

• void lengthChanged ( quint32 ms )
• void playerStateChanged ( QtopiaMedia::State state )
• void positionChanged ( quint32 ms )
• void volumeChanged ( int volume )
• void volumeMuted ( bool muted )

• 4 signals inherited from QIODevice
• 1 signal inherited from QObject

Additional Inherited Members

• 1 property inherited from QObject
• 1 public slot inherited from QObject
• 1 public type inherited from QObject
• 4 static public members inherited from QObject
• 5 protected functions inherited from QIODevice
• 7 protected functions inherited from QObject
• 2 protected variables inherited from QObject

Detailed Description

The QMediaDecoder class is an abstraction for decoders written for the Media Engine.

Member Function Documentation

QMediaDecoder::~QMediaDecoder ()   [virtual]

Destroy the QMediaDecoder object.

bool QMediaDecoder::isMuted ()   [pure virtual]

Return the mute state of the decoder.

quint64 QMediaDecoder::length ()   [pure virtual]

Return the length of the decoded data, to date if total not available.

void QMediaDecoder::lengthChanged ( quint32 ms )   [signal]

Signals the length information of the media has changed to ms milliseconds.

void QMediaDecoder::pause ()   [pure virtual]

Pause decoding data.

void QMediaDecoder::playerStateChanged ( QtopiaMedia::State state )   [signal]

Signals the current state of the QMediaDecoder

See also QtopiaMedia::State.

void QMediaDecoder::positionChanged ( quint32 ms )   [signal]

Signals a change in the current position ms of the media in milliseconds.

bool QMediaDecoder::seek ( qint64 ms )   [pure virtual]

Seek to the absolute position ms from the beginning of the file.

Reimplemented from QIODevice.

void QMediaDecoder::setMuted ( bool mute )   [pure virtual]

Set the mute state of the data, the decoder should continue to process audio data but not produce output, if the volume is muted.

See also isMuted().

void QMediaDecoder::setVolume ( int volume )   [pure virtual]

Adjust the volume of the data, the decoder should not attempt to adjust hardware volume, only amplification of the data produced by the decoder. The volume will be normalized by the system to a value between 0 and 100, the decoder should adjust internally as necessary.

See also volume().

void QMediaDecoder::start ()   [pure virtual]

Start decoding data from the inputPipe

See also QMediaDevice.

void QMediaDecoder::stop ()   [pure virtual]

Stop decoding data to the outputPipe

See also QMediaDevice.

int QMediaDecoder::volume ()   [pure virtual]

Return the current volume level.

See also setVolume().

void QMediaDecoder::volumeChanged ( int volume )   [signal]

Signals the volume of the media has changed.

void QMediaDecoder::volumeMuted ( bool muted )   [signal]

Signals the mute status of the volume has been set to muted.