Comments on: We have SIP working on android!

By: gzhhong

gzhhong — Wed, 04 Jun 2008 01:43:42 +0000

The method AudioSystem.isLineSupported(lineInfo) return false and Android can’t play the media in RTP package. Did anyone solve it?

By: Arjun

Arjun — Wed, 30 Apr 2008 21:11:28 +0000

Hi, we released it here

By: Himanshu

Himanshu — Sun, 27 Apr 2008 19:06:06 +0000

Do you think I can get a an early look to the RTP Impl? If yes, please email at himanshu ranavat at yahoo dt com

By: Himanshu

Himanshu — Sat, 26 Apr 2008 09:42:22 +0000

Thats very impressive……..maybe you could initially stream a media file such as a .wav file….thats what I have been trying to do but without much success. Are you aware of a solution to this problem on Android:

float fFrameRate=16000.0F;
AudioFormat format=new AudioFormat(AudioFormat.Encoding.PCM_SIGNED, fFrameRate, 16, 1, 2, fFrameRate, false);

DataLine.Info lineInfo=new DataLine.Info(SourceDataLine.class, format, INTERNAL_BUFFER_SIZE);

if (!AudioSystem.isLineSupported(lineInfo))
{ Logg.log(”ERROR: AudioLine not supported by this System.”);
}

This is a code snippet from the AudioOutput class. I am trying to stream a .wav file from Android using RTP. What happens here is that the Line instance created is not supported by the AudioSystem….I guess there is some issue with frame rate/sampling/modulation choice. Can you share with me a solution to this problem or the kind of modulation/frame rate/sampling rate supported by Android. Thanks…..

By: Arjun

Arjun — Sat, 26 Apr 2008 03:11:11 +0000

Yes, my company completed the SIP UA and RTP port as well (we modified mjsip’s RTP basic impl and their UA) and should be releasing it in a couple of days. The sad part however is the android emulator’s media component crashes - this has been confirmed as a known problem in the google android dev group. So till they fix it, or we get hold of a google phone device (where I believe the media component works), we can’t test voice. Anyway, our next release will have the ported UA and the RTP and media, with RTP and media commented out and essentially untested. the UA has been tested to work with several SIP clients.

By: Himanshu

Himanshu — Sat, 26 Apr 2008 00:36:28 +0000

Hey, I was able to make a simple User Agent for Android using your stack. Thanks a lot. Until you guys release your version, you can check out mine at: http://tecknolojia.blogspot.com/2008/04/sip-user-agent-for-android.html

By: Himanshu

Himanshu — Fri, 25 Apr 2008 02:12:45 +0000

to be more specific to my question…..is there an RTP implementation to Android ? Even if there is one, sadly there is no audio capture feature in Android emulator

By: Himanshu

Himanshu — Thu, 24 Apr 2008 02:54:47 +0000

Hi,

The screencast that you show lets two clients call one another but how can one continue to make a voice conversation. Do you have some library or information you can point us to do the same.

Thanks Himanshu

By: SIP Android - a sneak screencast « iConverged

SIP Android - a sneak screencast « iConverged — Tue, 18 Mar 2008 02:53:27 +0000

[...] is an update to the original “We have SIP working on android” [...]

By: mike

mike — Mon, 17 Mar 2008 03:10:28 +0000

Interesting stuff ….btw a couple of bugs in the mjsip stack(1.6) one of those is in the JAudioLauncher.java

/** Stops media application */
public boolean stopMedia()
{ printLog(”halting java audio..”,LogLevel.HIGH);
if (sender!=null)
{ sender.halt(); sender=null;
printLog(”sender halted”,LogLevel.LOW);
}
if (audio_input!=null)
{ audio_input.stop(); audio_output=null;
// above line should be: audio_input.stop(); audio_input=null;
}

INTERESTING PROJECT!!