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view spandsp-0.0.3/spandsp-0.0.3/tests/ip_network_model.h @ 5:f762bf195c4b
import spandsp-0.0.3
author | Peter Meerwald <pmeerw@cosy.sbg.ac.at> |
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date | Fri, 25 Jun 2010 16:00:21 +0200 |
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/* * SpanDSP - a series of DSP components for telephony * * ip_network_model.h - Model an IP networks latency, jitter and loss. * * Written by Steve Underwood <steveu@coppice.org> * * Copyright (C) 2006 Steve Underwood * * All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2, as * published by the Free Software Foundation. * * This program 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 this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * $Id: ip_network_model.h,v 1.4 2006/10/24 13:45:29 steveu Exp $ */ /*! \file */ /*! \page ip_network_model_page IP network path model \section ip_network_model_page_sec_1 What does it do? The IP network modelling module provides simple modelling of latency, jitter and packet loss for a IP network media streaming path. Right now this is extremely crude. It needs to be extended to better represent the behaviour of UDP packets for RTP, UDPTL, and other streaming purposes. */ #if !defined(_IP_NETWORK_MODEL_H_) #define _IP_NETWORK_MODEL_H_ /*! IP network model descriptor. This holds the complete state of an IP network path model. */ typedef struct { /*! The bulk delay of the path, in samples */ int bulk_delay; /*! Jitter */ int jitter; /*! Packet loss, in parts per million */ int packet_loss; queue_t packet_queue; int current_samples; int delay[2]; } ip_network_model_state_t; #ifdef __cplusplus extern "C" { #endif void ip_network_model_send(ip_network_model_state_t *s, int seq_no, int count, const uint8_t *buf, int len); int ip_network_model_get(ip_network_model_state_t *s, int time_step, uint8_t *msg, int max_len, int *seq_no); ip_network_model_state_t *ip_network_model_init(int bulk_delay, int jitter, int loss); int ip_network_model_release(ip_network_model_state_t *s); #ifdef __cplusplus } #endif #endif /*- End of file ------------------------------------------------------------*/