NewLC - How to play mp3 file just like a wav file ? - Comments

How to play mp3 file in UIQ 3.1 Symbian 9.2 via audio stream?

anand_zain76 — Wed, 12 Mar 2008 07:34:07 +0100

Hi,
I m trying to play an mp3 file in symbian 9.2 by CMdaAudioOutputStream.
I m following these steps:
1. iAudioOutputStream = CMdaAudioOutputStream::NewL(*this);

iAudioSettings.Query();
iAudioSettings.iChannels=TMdaAudioDataSettings::EChannelsMono;
iAudioSettings.iSampleRate=TMdaAudioDataSettings::ESampleRate8000Hz;

iAudioOutputStream->Open(&iAudioSettings);

in callback MaoscOpenComplete() follwoing r implemented:

iDataType.Set(KMMFFourCCCodeMP3);
iAudioOutputStream->SetDataTypeL(iDataType);
iAudioOutputStream->SetPriority(EMdaPriorityMax , EMdaPriorityPreferenceTimeAndQuality);

After these I call:
iAudioOutputStream->WriteL(iBuffer);

Then
MaoscBufferCopied() is called with 0 error

but MaoscPlayComplete()
is called with -10

Please help

Thanks
Regards

Re: How to play mp3 file just like a wav file ?

raghav_an — Mon, 31 Dec 2007 06:38:34 +0100

Hi,

Make sure that the file exists and the path specified is the correct one. The error in "MapcInitComplete" suggests that probably the file can not be found in the specified path.
Make sure that your app is having the required capability to read from "\sys" folder.

Re: How to play mp3 file just like a wav file ?

brajesh1983 — Tue, 09 Oct 2007 09:01:52 +0200

Hi,

I have posted the following code....Plz help me in playing the mp3 file.....

Thanks..

When i debugged the following function i got the value of aError -1
void CSoundPlayer::MapcInitComplete(TInt aError, const TTimeIntervalMicroSeconds& /*aDuration*/)
{
iState = aError ? ENotReady : EReady;
}
Passing sound file...
void CSortingMainViewContainer::ConstructL(const TRect& aRect)
{
CreateWindowL();
if (!pSound)
{
pSound=CSoundPlayer::NewL(_L("C:\\system\\Apps\\Sound\\bkj.mp3"));//Getting the sound file path
}
}
Code to play the sound file...
TKeyResponse CSortingMainViewContainer::OfferKeyEventL(
const TKeyEvent& aKeyEvent,TEventCode aType)
{
switch(MainMenu->MenuItemHandler(aKeyEvent,aType,AppUI))
{

case KMenuOne:
{
if(pSound)
{
pSound->PlayL();//play sound file
}
break;
}
case KMenuTwo:
{
pSound->StopL();
AppUI->ActivateLocalViewL (TUid::Uid(ESortingGameViewId1));
break;
}
default:
break;
}

return EKeyWasNotConsumed;
// return CCoeControl::OfferKeyEventL(aKeyEvent, aType);
}
Functions of CSoundPlayer class

CSoundPlayer* CSoundPlayer::NewL(const TDesC& aFile)
{
CSoundPlayer* self = NewLC(aFile);
CleanupStack::Pop(self);
return self;
}

CSoundPlayer* CSoundPlayer::NewLC(const TDesC& aFile)
{
CSoundPlayer* self = new (ELeave) CSoundPlayer();
CleanupStack::PushL(self);
self->ConstructL(aFile);
return self;
}

CSoundPlayer::CSoundPlayer()
{
}

CSoundPlayer::~CSoundPlayer()
{
delete iMdaPlayer;
iMdaPlayer = NULL;
}

void CSoundPlayer::ConstructL(const TDesC& aFile)
{
if (!iMdaPlayer)
{
iMdaPlayer=CMdaAudioPlayerUtility::NewFilePlayerL(aFile,*this,EMdaPriorityMax);
}

}

void CSoundPlayer::RepeatL()
{
if (iMdaPlayer)
{
iMdaPlayer->SetRepeats(1, TTimeIntervalMicroSeconds(1));
}

}

void CSoundPlayer::PlayL()
{
if(iState==EReady)
{
iState=EPlaying;
iMdaPlayer->Play();
}
}

void CSoundPlayer::StopL()
{
if(iState==EPlaying)
{
iMdaPlayer->Stop();
iState = EReady;
}
}

// from MMdaAudioPlayerCallback
void CSoundPlayer::MapcInitComplete(TInt aError, const TTimeIntervalMicroSeconds& /*aDuration*/)
{
iState = aError ? ENotReady : EReady;
}

void CSoundPlayer::MapcPlayComplete(TInt aError)
{
iState = aError ? ENotReady : EReady;
}

Re: How to play mp3 file just like a wav file ?

raghav_an — Mon, 08 Oct 2007 15:12:24 +0200

Hi,

What is the result of the call "CMdaAudioPlayerUtility::NewFilePlayerL()".
This should generate a callback "MMdaAudioPlayerCallback::MapcInitComplete() " with aError=KErrNone. Inidicating the creation and initialization is successful.

What is the error code you are getting in the callback method?

The information you have provided is too little to say anything. If you post your complete (or may be relevant part of) code, you may get some suggestions....

Chao,
Ravi

Re: How to play mp3 file just like a wav file ?

brajesh1983 — Tue, 25 Sep 2007 13:40:40 +0200

Hi eric,

I want to play a mp3 file on my Nokia N72 phone....as i think it support mp3 file.

if i pass the mp3 file in the following function as shown below will it play the mp3 file?

iMdaPlayer=CMdaAudioPlayerUtility::NewFilePlayerL(_L("C:\\system\\Apps\\Sound\\play.mp3"),*this,EMdaPriorityMax);

Re: How to play mp3 file just like a wav file ?

eric — Mon, 24 Sep 2007 17:43:31 +0200

the code does not work.

What do you mean by the code does not work? It crashes ? it just output gargabe or nothing ? it return an error code ?
Are you sure that your phone can play your MP3 file ?

And maybe you can also post your code instead of requesting some... it would help more people and someone might find why it does not work.

Re: How to play mp3 file just like a wav file ?

brajesh1983 — Mon, 24 Sep 2007 14:04:43 +0200

Hi Sysctl-forum,

Actually i am able to play the WAV file in the mobile phone but when i want to play the mp3 file, the code does not work.
So i think there is some other way to play the mp3 file thats why i need a sample project to play mp3 file...

Thanks for help...

Brajesh....

Re: How to play mp3 file just like a wav file ?

sysctl-forum — Mon, 24 Sep 2007 09:16:23 +0200

Exactly like you would play a WAV file. Since you mentioned in your post that you know how to do it, I thought you do not need the code. For examples, look at Nokia S60 Internet Radio.

Re: How to play mp3 file just like a wav file ?

brajesh1983 — Sat, 22 Sep 2007 09:03:48 +0200

hi thanks for the help but i request you to please post the sample code to play mp3 file......

thank u

brajesh

Re: How to play mp3 file just like a wav file ?

sysctl-forum — Sat, 22 Sep 2007 06:08:07 +0200

If you are using CMdaAudioOutputStream to play PCM data, you can play MP3 data by calling CMdaAudioOutputStream::SetDataTypeL(TFourCC aAudioType) with KMMFFourCCCodeMP3.

How to play mp3 file just like a wav file ?

brajesh1983 — Fri, 21 Sep 2007 09:39:25 +0200

[b]Hi,

I want to play a mp3 file as a background music in my application not a wav file.But the problem is that when i searched the article about to play the mp3 file then it says to decode the mp3 file and there is a long process to decode the mp3 file, so is not any simpler way to play mp3 file like playing the wav file because playing wav file is much easier.