public AmrInputStream(InputStream inputStream){
  mInputStream=inputStream;
  mGae=GsmAmrEncoderNew();
  GsmAmrEncoderInitialize(mGae);
}

public AmrInputStream ( InputStream inputStream ) { mInputStream = inputStream ; mGae = GsmAmrEncoderNew ( ) ; GsmAmrEncoderInitialize ( mGae ) ; }
create a new amrinputstream , which converts 16 bit pcm to amr
