forked from Mirrors/freeswitch
69 lines
2.4 KiB
C
69 lines
2.4 KiB
C
/*
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* SpanDSP - a series of DSP components for telephony
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*
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* constel.h - Display QAM constellations, using the FLTK toolkit.
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*
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* Written by Steve Underwood <steveu@coppice.org>
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*
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* Copyright (C) 2004 Steve Underwood
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*
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2, as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/*! \page constel_page Modem performance monitoring
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\section constel_page_sec_1 What does it do?
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This code controls a GUI window, which provides monitoring of the internal status
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of a modem. It shows, graphically:
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- the constellation, for PSK, QAM and other similar modulations.
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- the equalizer status, for modems with adaptive equalizers.
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- the carrier frequency.
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- the symbol timing correction.
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\section constel_page_sec_2 How does it work?
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This code uses the FLTK cross platform GUI toolkit. It works on X11 and Windows platforms.
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In addition to the basic FLTK toolkit, fltk_cartesian is also required.
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*/
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#if !defined(_MODEM_MONITOR_H_)
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#define _MODEM_MONITOR_H_
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struct qam_monitor_s;
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typedef struct qam_monitor_s qam_monitor_t;
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#if defined(__cplusplus)
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extern "C"
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{
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#endif
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qam_monitor_t *qam_monitor_init(float constel_width, const char *tag);
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int qam_monitor_clear_constel(qam_monitor_t *s);
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int qam_monitor_update_constel(qam_monitor_t *s, const complexf_t *pt);
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int qam_monitor_update_equalizer(qam_monitor_t *s, const complexf_t *coeffs, int len);
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int qam_monitor_update_int_equalizer(qam_monitor_t *s, const complexi16_t *coeffs, int len);
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int qam_monitor_update_symbol_tracking(qam_monitor_t *s, float total_correction);
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int qam_monitor_update_carrier_tracking(qam_monitor_t *s, float carrier);
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int qam_monitor_update_audio_level(qam_monitor_t *s, const int16_t amp[], int len);
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void qam_wait_to_end(qam_monitor_t *s);
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#if defined(__cplusplus)
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}
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#endif
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#endif
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/*- End of file ------------------------------------------------------------*/
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