java - Does Android's RTP library support multicast? -

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i trying multicast audio stream 1 device many others using android's rtp classes.

i do not want use third party libraries if @ possible.

i able stream 2 way audio between 2 devices using audiostream , audiogroup set each other's ip addresses, stream multicast group.

if try instantiate audiostream multicast address such 239.1.1.1 , then, on other device use audiostream.associate() same multicast address, streams not heard.

i have read android devices not supporting multicast, devices (both samsung galaxy tab 2s) support it. have added following code try obtain multicast lock:

wifimanager wifi = (wifimanager) getsystemservice(context.wifi_service);             multicastlock = wifi.createmulticastlock("multicastlock");             multicastlock.setreferencecounted(true);             multicastlock.acquire();

additionally have following permissions in manifest file:

   <uses-permission android:name="android.permission.internet" />    <uses-permission android:name="android.permission.access_wifi_state" />    <uses-permission android:name="android.permission.change_wifi_multicast_state" />    <uses-permission android:name="android.permission.access_network_state" />    <uses-permission android:name="android.permission.record_audio" />

after looking lot, have discovered rtp classes support sending multicast, not receiving. presumably because sockets used not multicastsockets.

also, interested, tab 2 in fact 1 of devices doesn't support joining multicast groups (i.e. not send igmp join packets), if set static multicast groups in network infrastructure, packets received - hence why mentioned above knew support it.

a quick way of seeing if android device supports joining multicast groups looking presence of /proc/net/igmp file.


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