/*------------------------------------------------------------------------- * rtpsources.c - rtpsources *------------------------------------------------------------------------- *//////#include <stdlib.h>#include "hust_rtp.h"#include "hust_hash.h"/*------------------------------------------------------------------------- * rtpsources - fill array sources with a list of synchronization sources * participating in the session and return list's length. * Maxsources gives the size of the area pointed to by sources in  * sizeof(ssrc_t) (short) units. *------------------------------------------------------------------------- */intrtpsources(struct session *psn, ssrc_t *sources, u16_t maxsources){	struct htent	**v;	int		htcount, i, count;	///if (pthread_mutex_lock(&psn->sn_getstreammutex) != 0)		///return ERROR;	if ((v = htenum(psn->sn_ssrcs)) == NULL) {		////pthread_mutex_unlock(&psn->sn_getstreammutex);		return ERROR;	}	////正確獲得一個會話中所有的同步源		for (htcount = 0; v[htcount] != NULL; htcount++);  	maxsources = min(maxsources, htcount);	///數組的大小不能大于maxsources，否則溢出  	for (i = 0, count = 0; count < maxsources && i < htcount; i++)		if (((struct stream *) v[i]->hte_object)->stm_zombie != TRUE) {			sources[i] = v[i]->hte_key;			count++;		}		///sources中放的是哈希表的key	////pthread_mutex_unlock(&psn->sn_getstreammutex);	///free(v);	return maxsources;}/////把一個會話中的所有的同步源的key放到一個數組中/////并返回數組的大小