Audio control issues in libjingle_peerconnection for Android on some devices (like N4)

[Andrew Benton]

Hello all, I've been trying to solve a few audio quality issues in an Android app I'm building that relies on libjingle_peerconnection.jar and libjingle_peerconnection_so.so. The issues fall under two categories:

1. Controlling volume of audio playback streams and routing audio to the proper speaker (earpiece vs speakerphone)

2. Microphone recording volume

Leaving aside #2 for now, has anyone else had trouble using Android java APIs (AudioManager etc) to route audio? Specifically on my Nexus 4 I cannot get audio to route to the earpiece, no matter how many times I call audioManager.setSpeakerphoneOn(false). And there doesn't seem to be an API in libjingle_peerconnection.jar to control where audio is routed.

Secondly, using the volume control buttons doesn't affect the volume of audio playback, so it seems like audio is generally being routed in a strange way.

If anyone has experienced something similar and figured out how to get this working I would be forever grateful for an explanation.

Cheers,

amb

[hu lingyun]

i had same problem.  It works well on some devices. But it seems have no benefits with openSL any more. 

http://code.google.com/p/webrtc/issues/detail?id=2498

i had use followed code:

audioManager.setMode(isWiredHeadsetOn ? AudioManager.MODE_IN_CALL : AudioManager.MODE_IN_COMMUNICATION);

audioManager.setSpeakerphoneOn(!isWiredHeadsetOn);