Sippin is an open source library based on mjSip for making VoIP calls on Android leveraging on the SIP protocol.
This library only supports audio calls. In particular, the following audio codec are supported:
- L8
- L16
- PCMU
- PCMA
- AMR
- GSM
- GSM-EFR
The first are directly implemented in the library, while the others are already included in the Android API.