Mercurial > hg > audiostuff
comparison 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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| 4:26cd8f1ef0b1 | 5:f762bf195c4b |
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| 1 /* | |
| 2 * SpanDSP - a series of DSP components for telephony | |
| 3 * | |
| 4 * ip_network_model.h - Model an IP networks latency, jitter and loss. | |
| 5 * | |
| 6 * Written by Steve Underwood <steveu@coppice.org> | |
| 7 * | |
| 8 * Copyright (C) 2006 Steve Underwood | |
| 9 * | |
| 10 * All rights reserved. | |
| 11 * | |
| 12 * This program is free software; you can redistribute it and/or modify | |
| 13 * it under the terms of the GNU General Public License version 2, as | |
| 14 * published by the Free Software Foundation. | |
| 15 * | |
| 16 * This program is distributed in the hope that it will be useful, | |
| 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 19 * GNU General Public License for more details. | |
| 20 * | |
| 21 * You should have received a copy of the GNU General Public License | |
| 22 * along with this program; if not, write to the Free Software | |
| 23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
| 24 * | |
| 25 * $Id: ip_network_model.h,v 1.4 2006/10/24 13:45:29 steveu Exp $ | |
| 26 */ | |
| 27 | |
| 28 /*! \file */ | |
| 29 | |
| 30 /*! \page ip_network_model_page IP network path model | |
| 31 \section ip_network_model_page_sec_1 What does it do? | |
| 32 The IP network modelling module provides simple modelling of latency, jitter | |
| 33 and packet loss for a IP network media streaming path. | |
| 34 | |
| 35 Right now this is extremely crude. It needs to be extended to better represent | |
| 36 the behaviour of UDP packets for RTP, UDPTL, and other streaming purposes. | |
| 37 */ | |
| 38 | |
| 39 #if !defined(_IP_NETWORK_MODEL_H_) | |
| 40 #define _IP_NETWORK_MODEL_H_ | |
| 41 | |
| 42 /*! | |
| 43 IP network model descriptor. This holds the complete state of | |
| 44 an IP network path model. | |
| 45 */ | |
| 46 typedef struct | |
| 47 { | |
| 48 /*! The bulk delay of the path, in samples */ | |
| 49 int bulk_delay; | |
| 50 /*! Jitter */ | |
| 51 int jitter; | |
| 52 /*! Packet loss, in parts per million */ | |
| 53 int packet_loss; | |
| 54 | |
| 55 queue_t packet_queue; | |
| 56 int current_samples; | |
| 57 int delay[2]; | |
| 58 } ip_network_model_state_t; | |
| 59 | |
| 60 #ifdef __cplusplus | |
| 61 extern "C" { | |
| 62 #endif | |
| 63 | |
| 64 void ip_network_model_send(ip_network_model_state_t *s, | |
| 65 int seq_no, | |
| 66 int count, | |
| 67 const uint8_t *buf, | |
| 68 int len); | |
| 69 | |
| 70 int ip_network_model_get(ip_network_model_state_t *s, | |
| 71 int time_step, | |
| 72 uint8_t *msg, | |
| 73 int max_len, | |
| 74 int *seq_no); | |
| 75 | |
| 76 ip_network_model_state_t *ip_network_model_init(int bulk_delay, | |
| 77 int jitter, | |
| 78 int loss); | |
| 79 | |
| 80 int ip_network_model_release(ip_network_model_state_t *s); | |
| 81 | |
| 82 #ifdef __cplusplus | |
| 83 } | |
| 84 #endif | |
| 85 | |
| 86 #endif | |
| 87 /*- End of file ------------------------------------------------------------*/ |