Hi Espen :)
On 11/12/10 5:20 AM, ext Espen Riskedal wrote:
> I tested something like:
>
> m_iodevice = new QFile("audiosamples/sample.mp3", this);
> if (!m_iodevice->open(QIODevice::ReadOnly))
> qDebug()<< "failed to open QIODevice";
> m_player = new QMediaPlayer(this, QMediaPlayer::StreamPlayback);
> m_player->setMedia(QMediaContent(), m_iodevice);
> m_player->setVolume(100);
> m_player->play();
>
> which works fine on Windows, but fails on Symbian.
>
> I noticed a comment some time ago on Qt Labs that this would be fixed,
> now I see it still seems to be an open issue:
> http://bugreports.qt.nokia.com/browse/QTMOBILITY-604.
>
Yes, currently there is no support for this on Symbian.
> Basically what I want to achieve is streaming playback of audio
> (mp3/mp4/whatever) on Symbian. I'd like to control the
> buffering/download myself (offline + encryption), so to implement my
> own custom QIODevice seems like the logical solution. Are there any
> updates on this issue?
Following 604 should keep you informed.
> At least QMediaPlayer::hasSupport() shold return not supported for
> QMediaPlayer::StreamPlayback if that is the case on Symbian. At the
> moment it return "ProbablySupported".
>
Agreed, could you file a bug please?
> Also, can you think of any other ways I can still use
> QMediaPlayer/Multimedia and achieve what I want? Or am I looking at a
> pure QAudioOutput solution here where I'll have to deal with the
> codecs myself?
What you're doing is the easiest way, platform support for this is not
guaranteed though (hence the hasSupport()).
> Note: I also tried passing a QUrl("http://some.place/sample.mp3";) just
> to see if that worked. On Windows once again it worked fine. On
> Symbian that as well failed. It went online (insisting on 3G even if
> wifi was around) but I got QMediaPlayer::StalledMedia (the mp3 was
> 8megs) after a bit of loading.
Sounds like a bug. A report would be good.
> Is there a class in Multimedia where I can feed a stream in and get
> PCM data back?
No, though we hope to improve our audio offering.
- Justin
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