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5
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1 /*
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2 * SpanDSP - a series of DSP components for telephony
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3 *
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4 * constel.h - Display QAM constellations, using the FLTK toolkit.
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5 *
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6 * Written by Steve Underwood <steveu@coppice.org>
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7 *
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8 * Copyright (C) 2004 Steve Underwood
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9 *
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10 * All rights reserved.
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11 *
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12 * This program is free software; you can redistribute it and/or modify
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13 * it under the terms of the GNU General Public License version 2, as
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14 * published by the Free Software Foundation.
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15 *
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16 * This program is distributed in the hope that it will be useful,
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17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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19 * GNU General Public License for more details.
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20 *
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21 * You should have received a copy of the GNU General Public License
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22 * along with this program; if not, write to the Free Software
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23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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24 *
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25 * $Id: modem_monitor.h,v 1.9 2006/10/24 13:45:29 steveu Exp $
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26 */
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27
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28 /*! \page constel_page Modem performance monitoring
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29 \section constel_page_sec_1 What does it do?
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30 This code controls a GUI window, which provides monitoring of the internal status
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31 of a modem. It shows, graphically:
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32
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33 - the constellation, for PSK, QAM and other similar modulations.
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34 - the equalizer status, for modems with adaptive equalizers.
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35 - the carrier frequency.
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36 - the symbol timing correction.
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37
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38 \section constel_page_sec_2 How does it work?
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39 This code uses the FLTK cross platform GUI toolkit. It works on X11 and Windows platforms.
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40 In addition to the basic FLTK toolkit, fltk_cartesian is also required.
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41 */
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42
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43 #if !defined(_MODEM_MONITOR_H_)
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44 #define _MODEM_MONITOR_H_
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45
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46 struct qam_monitor_s;
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47
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48 typedef struct qam_monitor_s qam_monitor_t;
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49
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50 #ifdef __cplusplus
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51 extern "C" {
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52 #endif
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53
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54 qam_monitor_t *qam_monitor_init(float constel_width, const char *tag);
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55 int qam_monitor_update_constel(qam_monitor_t *s, const complexf_t *pt);
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56 int qam_monitor_update_equalizer(qam_monitor_t *s, const complexf_t *coeffs, int len);
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57 int qam_monitor_update_symbol_tracking(qam_monitor_t *s, float total_correction);
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58 int qam_monitor_update_carrier_tracking(qam_monitor_t *s, float carrier);
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59 int qam_monitor_update_audio_level(qam_monitor_t *s, const int16_t amp[], int len);
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60 void qam_wait_to_end(qam_monitor_t *s);
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61
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62 #ifdef __cplusplus
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63 }
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64 #endif
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65
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66 #endif
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67 /*- End of file ------------------------------------------------------------*/
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