CMdaAudioOutputStream to play AAC+

[sameet]

Hi,

I am using CMdaAudioOutputStream to play AAC and MP3 audio using the FP3 SDK. Passing the respective FourCC codes to the its SetDataTypeL() function seems to do the job for these types of the audio without the need to decode them to PCM16.

Is it possible to do the same, in case of the mp4 and 3gp formats containing AAC+ or eAAC+ encoded audio? If yes, then what is the technique? What are the supported FourCC codes for these?

Best Regards,
Sameet.

[nmittal]

Hi,

eAAC+ andAAC+ are added in S60 3rd edition.

Regards,
Nitin

[sameet]

Hi,

Thanks for the reply.

This link from forum nokia
http://forum.nokia.com/main/0,,018-2...html?model=n70
claims that the N70, which is a FP3 supported device, can play the AAC+ and eAAC+ formats.

Anyway, in case of any device supporting these formats, what is the technique for getting the CMdaAudioOutputstream to decode and play them, the way it does the AAC and MP3 formats.

This link
http://forum.nokia.com/main/1,6566,1_3,00.html
mentions that these formats are supported only when contained in mp4 or 3gp formats, in which case what are the supported FourCC codes that can be passed to the CMdaAudioOutputStream to have it decode and play them? If at all it is possible that is. (The FourCC codes to use for these formats haven't been mentioned in any of the SDKs including the 3rd edition, but the codes for MP3 and AAC have).

Best Regards,
Sameet.

[arunnrnair]

Hello
I am Arun.I tried the same with SetDataTypeL(KMMFFourCCCodeMP3) but this left with KErrNotSupported and I have to use CMMFCodec to convert. Can kindly tell me, how SetDataTypeL method worked for you

[sameet]

Hi Arun,

Which SDK did you build it with and on which device did you run this test?

[arunnrnair]

Hello I am Arun again,
I am using s60 3rd edition sdk. I found that SetDataTypeL method is leaving with error code -5 which indicates KErrNotSupported.The code worked for formats similiar to PCM like a wav, but for formats like mp3,aac etc it left.
So I tried to convert Mp3 to pcm16 using by cmmfcodec and then play using CMdaAudioOutputStream. I would like to know how you used the method?

[sameet]

Hi,

Did you test it on the device? The SetDataTypeL() for mp3 etc. may not work on the emulator, but will on devices (that support these formats, and mostly all 3rd edition devices do).

Best Regards,
Sameet.