Full Duplex on Series 40 phones with Nokia VoIP client

[rishikulkarni]

Great example on Full duplex audio support in S60 here:
http://www.developer.nokia.com/info/..._0_en.zip.html
and a nice article
http://www.developer.nokia.com/Commu...l_Duplex_Audio

Could you help clarify the following query? If Full duplex audio is limited to S60 how is Nokia supporting VoIP client on Series 40 phones listed here: http://www.developer.nokia.com/Commu...ies_40_devices

Thank you.

[bandarap]

Hi rishikulkarni and Welcome to Nokia developer discussion boards,

Full duplex audio is limited to Symbian means "Full duplex audio API from Symbian is available for developers".

As you know only developer platform in S40 is Java ME and Java ME doesn't have Full duplex audio supported APIs. Whereas Symbian has many developer platforms (like Java ME, C++, Qt and etc.) and Symbian provides C++ API for Full duplex audio.

Voip clients available on S40 phones are native applications those are not accessible for 3rd party developers.

[IndoProRider]

Hi bandarap,
I see that some new devices have these 2 features:

Audio Recorder AMR
Audio Streaming

So is it possible to perform Full Duplex Audio in Java S40 devices in order to implement a stand alone VoIP Client?

I saw this applcation:

http://nokia-c3-01.java-mobiles.net/...get-62748.html

and this makes me wonder about the above question.

[IndoProRider]

Anyone can help?

[skalogir]

Hi IndoProRider,

Audio Recorder AMR is indeed supported on the latest devices, as a native application.
You can capture audio/amr from within your application when you are not in a call in the form of start recording, commit actions via the Mobile Media API not as streaming. Keep in mind that the Java ME offering does not provide Application Programming Interfaces for accessing the telephony/voice module of the device. The minute, you make a call, the MIDlet is sent to the background and from that point on, you loose control over it.

[IndoProRider]

Hi IndoProRider,

Audio Recorder AMR is indeed supported on the latest devices, as a native application.
You can capture audio/amr from within your application when you are not in a call in the form of start recording, commit actions via the Mobile Media API not as streaming. Keep in mind that the Java ME offering does not provide Application Programming Interfaces for accessing the telephony/voice module of the device. The minute, you make a call, the MIDlet is sent to the background and from that point on, you loose control over it.

Thank you for the replay.
So can you confirm that without the streaming audio recording it is definetely impossible to perform audio full duplex in any S40 devices?
Thanks

[IndoProRider]

Please, is there a nokia technician who is able to answer this question definitively, if possible, by providing evidence?
Any help or answer is welcome. Thanks.

[skalogir]

Hi IndoProRider,

So can you confirm that without the streaming audio recording it is definetely impossible to perform audio full duplex in any S40 devices?

That's correct, I don't see a way to build bidirectional real-time voice communication on top of the supported Java ME APIs for Series 40 due to lack of concurrent/bidirectional streaming capabilities. When a platform supports VOIP, there is typically a dedicated SIP API that developers can use to build their applications with. In Nokia's Java ME offering, the SIP API (JSR-180) is only supported in certain S60 releases.

[IndoProRider]

A part from Sip API (I can make my own signaling protocol). The key issue is that it is not possible to perform audio full duplex: in particular it is impossible to capture real time stream audio from the mic. Right?

Thank you for the replay.
So can you confirm that without the streaming audio recording it is definetely impossible to perform audio full duplex in any S40 devices?
Thanks

Hi IndoProRider,



That's correct, I don't see a way to build bidirectional real-time voice communication on top of the supported Java ME APIs for Series 40 due to lack of concurrent/bidirectional streaming capabilities. When a platform supports VOIP, there is typically a dedicated SIP API that developers can use to build their applications with. In Nokia's Java ME offering, the SIP API (JSR-180) is only supported in certain S60 releases.

[skalogir]

it is impossible to capture real time stream audio from the mic. Right?

That's right, you would eventually run out of heap, so you would need to empty/commit your buffer and start over. That's not streaming.

[su.dude]

As you can't run in the background the whole thing would be kinda crippled experience ?
If you want to do VoIP, then why not re-use what is available in the platform, http://www.developer.nokia.com/Commu...ies_40_devices

[Babbobalo]

Hi,
Could someone tell me if the newest Nokia S40 Developer Platform (Dp 1.0, 1.1, 2.0) supports Full duplex audio
or at least the Sip VoIP client v104 is accessible for 3rd party.
Thank you

[Babbobalo]

Anyone can help?
Thanks