public void addCallStreamObserver(CallStreamObserver observer) {
callStreamObserver = observer;
}
public void start() {
SipToFlashTranscoder sipToFlashTranscoder = new SpeexSipToFlashTranscoderImp(sipCodec);
FlashToSipTranscoder flashToSipTranscoder = new SpeexFlashToSipTranscoderImp(sipCodec);
if (sipCodec.getCodecId() != SpeexCodec.codecId) {
flashToSipTranscoder = new NellyFlashToSipTranscoderImp(sipCodec);
sipToFlashTranscoder = new NellySipToFlashTranscoderImp(sipCodec);