Transcoder rtmpToRtpTranscoder, rtpToRtmpTranscoder;
if (sipCodec.getCodecId() == SpeexCodec.codecId) {
rtmpToRtpTranscoder = new SpeexToSpeexTranscoder(sipCodec);
rtpToRtmpTranscoder = new SpeexToSpeexTranscoder(sipCodec, listenStream);
} else {
rtmpToRtpTranscoder = new NellyToPcmTranscoder(sipCodec);
rtpToRtmpTranscoder = new PcmToNellyTranscoder(sipCodec, listenStream);
}
packetProcessor = new ReceivedRtpPacketProcessor(rtpToRtmpTranscoder);
rtpReceiver = new RtpStreamReceiver(packetProcessor, socket, rtpToRtmpTranscoder.getIncomingEncodedFrameSize());