/*------------------------------------------------------------------------- * rtpgetstream.c - rtpgetstream *------------------------------------------------------------------------- */#include "hust_rtp.h"#include "hust_linux.h"////#include "hust_rtcp.h"#include "hust_hash.h"/*------------------------------------------------------------------------ * rtpgetstream - look up a stream struct by SSRC ID and incr its refcnt *------------------------------------------------------------------------ */struct stream *rtpgetstream(struct session *psn, ssrc_t ssrc){	struct stream *pstm;	///if (pthread_mutex_lock(&psn->sn_getstreammutex) != 0)	///	return NULL;  	pstm = (struct stream *) htget(psn->sn_ssrcs, ssrc);	if (pstm == NULL || pstm->stm_zombie == TRUE) {		////pthread_mutex_unlock(&psn->sn_getstreammutex);		return NULL;	}	pstm->stm_refcnt++;	////pthread_mutex_unlock(&psn->sn_getstreammutex);  	return pstm;}