Phonon and file's metadata

[matulik]

Hello.
I want to create a simple music player based on phonon libraries.
In my GUI I've a tablewidget. It's working at music list.
But I don't know how to read values ARTIST or TITLE from files metadata to take it to tablewidget after "open files" operation.

I've a

QList<Phonon::MediaSource> files;

QList<Phonon::MediaSource> files;

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to keep music files in my program. Now, I want to their metadata valuse like this:

mediaObject->setCurrentSource(files[index]);
QMap<QString, QString> metaData = mediaObject->metaData();
QString title = metaData.values("TITLE");

mediaObject->setCurrentSource(files[index]);
QMap<QString, QString> metaData = mediaObject->metaData();
QString title = metaData.values("TITLE");

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But it doesn't works...

Anybody know how to help my?

[high_flyer]

Note that meta data is not resolved before the metaDataChanged() signal is emitted.

Did you make sure that you code metadata code runs after metaDataChanged() was emitted?

[TobyYi]

Well, We must emit a signal metaDataChanged(),it can get the information for title.

[brezel]

hi!

i seem to be having kinda the same problem...did you ever get it to work? i own the book 'advanced qt programming' which has a code example showing how to get metadata from files, but also that doesn't work the only way i could read metadata from the mediaObject so far, is, if i call mediaObject->play(); and in the slot handling the emitted stateChanged signal do mediaObject->metaData(), then mediaObject->stop().

the example code has a timer waiting for 1 second for the stateChanged(Phonon::State, Phonon::State) signal after mediaObject.setCurrentSource(source);, but it seems like it is never emitted. could this be a bug in Phonon or am i misunderstandig the way this should work?

in my desparation i even tried:

localMediaObject.setCurrentSource(source);
connect(this, SIGNAL(xxx), &localMediaObject, SIGNAL(metaDataChanged()));
emit xxx();
if (!waitForMediaObjectToLoad(&localMediaObject, OneSecond))
    return;
...

localMediaObject.setCurrentSource(source);
connect(this, SIGNAL(xxx), &localMediaObject, SIGNAL(metaDataChanged()));
emit xxx();
if (!waitForMediaObjectToLoad(&localMediaObject, OneSecond))
    return;
...

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but that also didn't work. any pointers?

[spinax]

connect(localMediaObject, SIGNAL(metaDataChanged()), this, SLOT(yourfunction()));

connect(localMediaObject, SIGNAL(metaDataChanged()), this, SLOT(yourfunction()));

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[brezel]

connect(localMediaObject, SIGNAL(metaDataChanged()), this, SLOT(yourfunction()));

connect(localMediaObject, SIGNAL(metaDataChanged()), this, SLOT(yourfunction()));

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i don't get it...i have just tried that exact same code:

localMediaObject = new Phonon::MediaObject(this);
            Phonon::MediaSource source(filename);
            connect(localMediaObject, SIGNAL(metaDataChanged()), this, SLOT(addTrack()));
            localMediaObject->setCurrentSource(source);

localMediaObject = new Phonon::MediaObject(this);
            Phonon::MediaSource source(filename);
            connect(localMediaObject, SIGNAL(metaDataChanged()), this, SLOT(addTrack()));
            localMediaObject->setCurrentSource(source);

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but my addTrack method is never called :| thanks for replying anyway