--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/spandsp-0.0.3/spandsp-0.0.3/tests/ip_network_model.h	Fri Jun 25 16:00:21 2010 +0200
@@ -0,0 +1,87 @@
+/*
+ * 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 ------------------------------------------------------------*/