--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/spandsp-0.0.3/spandsp-0.0.3/tests/modem_monitor.h	Fri Jun 25 16:00:21 2010 +0200
@@ -0,0 +1,67 @@
+/*
+ * SpanDSP - a series of DSP components for telephony
+ *
+ * constel.h - Display QAM constellations, using the FLTK toolkit.
+ *
+ * Written by Steve Underwood <steveu@coppice.org>
+ *
+ * Copyright (C) 2004 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: modem_monitor.h,v 1.9 2006/10/24 13:45:29 steveu Exp $
+ */
+
+/*! \page constel_page Modem performance monitoring
+\section constel_page_sec_1 What does it do?
+This code controls a GUI window, which provides monitoring of the internal status
+of a modem. It shows, graphically:
+
+    - the constellation, for PSK, QAM and other similar modulations.
+    - the equalizer status, for modems with adaptive equalizers.
+    - the carrier frequency.
+    - the symbol timing correction.
+
+\section constel_page_sec_2 How does it work?
+This code uses the FLTK cross platform GUI toolkit. It works on X11 and Windows platforms.
+In addition to the basic FLTK toolkit, fltk_cartesian is also required.
+*/
+
+#if !defined(_MODEM_MONITOR_H_)
+#define _MODEM_MONITOR_H_
+
+struct qam_monitor_s;
+
+typedef struct qam_monitor_s qam_monitor_t;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+qam_monitor_t *qam_monitor_init(float constel_width, const char *tag);
+int qam_monitor_update_constel(qam_monitor_t *s, const complexf_t *pt);
+int qam_monitor_update_equalizer(qam_monitor_t *s, const complexf_t *coeffs, int len);
+int qam_monitor_update_symbol_tracking(qam_monitor_t *s, float total_correction);
+int qam_monitor_update_carrier_tracking(qam_monitor_t *s, float carrier);
+int qam_monitor_update_audio_level(qam_monitor_t *s, const int16_t amp[], int len);
+void qam_wait_to_end(qam_monitor_t *s);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+/*- End of file ------------------------------------------------------------*/