hust_rtpnewstream.c

来自「实现基于ip2022的MPEG2 TS的IP组播接收」· C语言 代码 · 共 70 行

/*-------------------------------------------------------------------------
 * rtpnewstream.c - rtpnrestream
 *-------------------------------------------------------------------------
 */
#include <ipOS.h>
#include <ipHAL.h>
///#include <limits.h>
#include "hust_rtp.h"
///#include <pthread.h>
///#include <stdlib.h>
///#include <strings.h>
#include "hust_hash.h"
#include "hust_event.h"


/*------------------------------------------------------------------------
 * rtpnewstream - create state for newly detected stream
 * The refcount is initialized to 1. Thus the caller must release the
 * stream when finished	 with it.
 *------------------------------------------------------------------------
 */
/*struct stream *
rtpnewstream(struct session *psn, u32_t ssrc )*/
struct stream *
rtpnewstream()
{

	struct stream		*pstm;

	pstm = (struct stream *) heap_alloc(sizeof(struct stream));
	///为stream结构分配内存空间
	if (pstm == NULL)
		return NULL;
	memset(pstm, 0, sizeof(struct stream));
	//按照struct stream的格式设置内存

	rtpqinit(&pstm->stm_queue);
	///初始化stream中的queue
	///pthread_mutex_init(&pstm->stm_mutex, NULL);
///	pstm->stm_ssrc = ssrc;
	pstm->stm_ssrc = 0;
	pstm->stm_ip = INADDR_ANY;
	
	/////表示可以和任何主机通信
 	pstm->stm_enqueue=TRUE;
	pstm->stm_payload = MPEG2TYPE;
	pstm->stm_inactthresh = RTP_DEFAULT_INACTIVETHRESH;
	pstm->stm_probation = RTP_MINSEQUENTIAL;
	pstm->stm_refcnt = 1;
	///pstm->stm_hiseq=hiseq-1;
	
	pstm->stm_cname=NULL;
	pstm->stm_name=NULL;
	pstm->stm_email=NULL;
	pstm->stm_phone=NULL;
	pstm->stm_loc=NULL;
	pstm->stm_tool=NULL;
	pstm->stm_note=NULL;
	pstm->stm_priv=NULL;
	
///	htadd(psn->sn_ssrcs, ssrc, pstm);
	///把队列加入到哈希表中
///	rtpcheckcollision(psn, ssrc);
	///判断接收到的stream的同步源标识符
	///是否和自己的冲突
//	rtppostevent(psn, EVENT_PARTICIPANT_NEW, ssrc, NULL, 0);
  	///发出事件，告知有新成员加入
	return pstm;
}