omsbuff_sync.c

linux下的rtp的实例源代码

/* * 
 *  $Id: OMSbuff_sync.c 324 2006-03-23 12:02:22Z shawill $
 *  
 *  This file is part of Fenice
 *
 *  Fenice -- Open Media Server
 *
 *  Copyright (C) 2004 by
 *  	
 *	- Giampaolo Mancini	<[e-mail]>
 *	- Francesco Varano	<[e-mail]>
 *	- Marco Penno		<[e-mail]>
 *	- Federico Ridolfo	<[e-mail]>
 *	- Eugenio Menegatti 	<[e-mail]>
 *	- Stefano Cau
 *	- Giuliano Emma
 *	- Stefano Oldrini
 * 
 *  Fenice is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  Fenice is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with Fenice; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *  
 * */

#include <fenice/bufferpool.h>

int OMSbuff_sync(OMSAggregate *aggr)
{
	double max_ts = 0;
	double curr_ts, next_ts;
	OMSAggregate *curr;
	
	for (curr=aggr; curr; curr=curr->next) {
		max_ts = omsbuff_max(max_ts, curr->buffer->slots[curr->buffer->control->valid_read_pos].timestamp);
	}
	
	for (curr=aggr; curr; curr=curr->next) {
		curr_ts = curr->buffer->slots[curr->buffer->control->valid_read_pos].timestamp;
		next_ts = curr->buffer->slots[curr->buffer->slots[curr->buffer->control->valid_read_pos].next].timestamp;
		while (abs(max_ts - curr_ts)>abs(max_ts - next_ts)) {
			curr->buffer->control->valid_read_pos = curr->buffer->slots[curr->buffer->control->valid_read_pos].next;	
			curr_ts = curr->buffer->slots[curr->buffer->control->valid_read_pos].timestamp;
			next_ts = curr->buffer->slots[curr->buffer->slots[curr->buffer->control->valid_read_pos].next].timestamp;
		}
	}
	
	return 0;
}