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freeswitch/libs/spandsp/tests/modem_monitor.cpp
Steve Underwood 0eada8dc77 Various little cleanups in spandsp
2015-06-18 21:15:41 +08:00

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/*
* SpanDSP - a series of DSP components for telephony
*
* modem_monitor.cpp - 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.
*/
#if defined(HAVE_CONFIG_H)
#include "config.h"
#endif
#if defined(HAVE_FL_FL_H) && defined(HAVE_FL_FL_CARTESIAN_H)
#define __STDC_LIMIT_MACROS
#include <inttypes.h>
#include <stdio.h>
#include <math.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/select.h>
#include <FL/Fl.H>
#include <FL/Fl_Overlay_Window.H>
#include <FL/Fl_Light_Button.H>
#include <FL/Fl_Cartesian.H>
#include <FL/Fl_Audio_Meter.H>
#include <FL/Fl_Output.H>
#include <FL/fl_draw.H>
#include "spandsp.h"
#define SYMBOL_TRACKER_POINTS 12000
#define CARRIER_TRACKER_POINTS 12000
struct qam_monitor_s
{
float constel_scaling;
Fl_Double_Window *w;
Fl_Group *c_const;
Fl_Group *c_right;
Fl_Group *c_eq;
Fl_Group *c_symbol_track;
/* Constellation stuff */
Ca_Canvas *canvas_const;
Ca_X_Axis *sig_i;
Ca_Y_Axis *sig_q;
Ca_Point *constel_point[100000];
int constel_window;
int next_constel_point;
int skip;
/* Equalizer stuff */
Ca_Canvas *canvas_eq;
Ca_X_Axis *eq_x;
Ca_Y_Axis *eq_y;
Ca_Line *eq_re;
Ca_Line *eq_im;
double eq_re_plot[200];
double eq_im_plot[200];
/* Carrier and symbol tracking stuff */
Ca_Canvas *canvas_track;
Ca_X_Axis *track_x;
Ca_Y_Axis *symbol_track_y;
Ca_Y_Axis *carrier_y;
Ca_Line *symbol_track;
Ca_Line *carrier;
float symbol_tracker[SYMBOL_TRACKER_POINTS];
double symbol_track_plot[SYMBOL_TRACKER_POINTS*2];
int symbol_track_points;
int symbol_track_ptr;
int symbol_track_window;
float carrier_tracker[CARRIER_TRACKER_POINTS];
double carrier_plot[CARRIER_TRACKER_POINTS*2];
int carrier_points;
int carrier_ptr;
int carrier_window;
/* Audio meter stuff */
Fl_Audio_Meter *audio_meter;
Fl_Output *audio_level;
int32_t power_reading;
};
#include "modem_monitor.h"
int qam_monitor_clear_constel(qam_monitor_t *s)
{
int i;
s->canvas_const->current(s->canvas_const);
for (i = 0; i < s->constel_window; i++)
{
if (s->constel_point[i])
{
delete s->constel_point[i];
s->constel_point[i] = NULL;
}
}
s->next_constel_point = 0;
Fl::check();
return 0;
}
/*- End of function --------------------------------------------------------*/
int qam_monitor_update_constel(qam_monitor_t *s, const complexf_t *pt)
{
int i;
s->canvas_const->current(s->canvas_const);
if (s->constel_point[s->next_constel_point])
delete s->constel_point[s->next_constel_point];
s->constel_point[s->next_constel_point++] = new Ca_Point(pt->re, pt->im, FL_BLACK);
if (s->next_constel_point >= s->constel_window)
s->next_constel_point = 0;
if (++s->skip >= 100)
{
s->skip = 0;
Fl::check();
}
return 0;
}
/*- End of function --------------------------------------------------------*/
int qam_monitor_update_equalizer(qam_monitor_t *s, const complexf_t *coeffs, int len)
{
int i;
float min;
float max;
/* Protect against screwy values */
for (i = 0; i < len; i++)
{
if (isnan(coeffs[i].re) || isinf(coeffs[i].re))
break;
if (isnan(coeffs[i].im) || isinf(coeffs[i].im))
break;
if (coeffs[i].re < -20.0f || coeffs[i].re > 20.0f)
break;
if (coeffs[i].im < -20.0f || coeffs[i].im > 20.0f)
break;
}
if (i != len)
return -1;
if (s->eq_re)
delete s->eq_re;
if (s->eq_im)
delete s->eq_im;
s->canvas_eq->current(s->canvas_eq);
i = 0;
min = coeffs[i].re;
if (min > coeffs[i].im)
min = coeffs[i].im;
max = coeffs[i].re;
if (max < coeffs[i].im)
max = coeffs[i].im;
for (i = 0; i < len; i++)
{
s->eq_re_plot[2*i] = (i - len/2)/2.0;
s->eq_re_plot[2*i + 1] = coeffs[i].re*s->constel_scaling;
if (min > coeffs[i].re)
min = coeffs[i].re;
if (max < coeffs[i].re)
max = coeffs[i].re;
s->eq_im_plot[2*i] = (i - len/2)/2.0;
s->eq_im_plot[2*i + 1] = coeffs[i].im*s->constel_scaling;
if (min > coeffs[i].im)
min = coeffs[i].im;
if (max < coeffs[i].im)
max = coeffs[i].im;
}
s->eq_x->minimum(-len/4.0);
s->eq_x->maximum(len/4.0);
s->eq_y->maximum((max == min) ? max + 0.2 : max);
s->eq_y->minimum(min);
s->eq_re = new Ca_Line(len, s->eq_re_plot, 0, 0, FL_BLUE, CA_NO_POINT);
s->eq_im = new Ca_Line(len, s->eq_im_plot, 0, 0, FL_RED, CA_NO_POINT);
Fl::check();
return 0;
}
/*- End of function --------------------------------------------------------*/
int qam_monitor_update_int_equalizer(qam_monitor_t *s, const complexi16_t *coeffs, int len)
{
int i;
float min;
float max;
if (s->eq_re)
delete s->eq_re;
if (s->eq_im)
delete s->eq_im;
s->canvas_eq->current(s->canvas_eq);
i = 0;
min = coeffs[i].re;
if (min > coeffs[i].im)
min = coeffs[i].im;
max = coeffs[i].re;
if (max < coeffs[i].im)
max = coeffs[i].im;
for (i = 0; i < len; i++)
{
if (min > coeffs[i].re)
min = coeffs[i].re;
if (max < coeffs[i].re)
max = coeffs[i].re;
s->eq_re_plot[2*i] = (i - len/2)/2.0f;
s->eq_re_plot[2*i + 1] = coeffs[i].re*s->constel_scaling;
if (min > coeffs[i].im)
min = coeffs[i].im;
if (max < coeffs[i].im)
max = coeffs[i].im;
s->eq_im_plot[2*i] = (i - len/2)/2.0f;
s->eq_im_plot[2*i + 1] = coeffs[i].im*s->constel_scaling;
}
min *= s->constel_scaling;
max *= s->constel_scaling;
s->eq_x->minimum(-len/4.0);
s->eq_x->maximum(len/4.0);
s->eq_y->maximum((max == min) ? max + 0.2 : max);
s->eq_y->minimum(min);
s->eq_re = new Ca_Line(len, s->eq_re_plot, 0, 0, FL_BLUE, CA_NO_POINT);
s->eq_im = new Ca_Line(len, s->eq_im_plot, 0, 0, FL_RED, CA_NO_POINT);
Fl::check();
return 0;
}
/*- End of function --------------------------------------------------------*/
int qam_monitor_update_symbol_tracking(qam_monitor_t *s, float total_correction)
{
int i;
int j;
float min;
float max;
s->symbol_tracker[s->symbol_track_ptr++] = total_correction;
if (s->symbol_track_points < SYMBOL_TRACKER_POINTS)
s->symbol_track_points++;
if (s->symbol_track_ptr >= SYMBOL_TRACKER_POINTS)
s->symbol_track_ptr = 0;
s->canvas_track->current(s->canvas_track);
if (s->symbol_track)
delete s->symbol_track;
s->track_x->current();
s->symbol_track_y->current();
min =
max = s->symbol_tracker[0];
for (i = s->symbol_track_ptr, j = 0; i < s->symbol_track_points; i++, j++)
{
if (min > s->symbol_tracker[i])
min = s->symbol_tracker[i];
if (max < s->symbol_tracker[i])
max = s->symbol_tracker[i];
s->symbol_track_plot[2*j] = j;
s->symbol_track_plot[2*j + 1] = s->symbol_tracker[i];
}
for (i = 0; i < s->symbol_track_ptr; i++, j++)
{
if (min > s->symbol_tracker[i])
min = s->symbol_tracker[i];
if (max < s->symbol_tracker[i])
max = s->symbol_tracker[i];
s->symbol_track_plot[2*j] = j;
s->symbol_track_plot[2*j + 1] = s->symbol_tracker[i];
}
s->symbol_track_y->maximum((fabs(max - min) < 0.05) ? max + 0.05 : max);
s->symbol_track_y->minimum(min);
s->symbol_track = new Ca_Line(s->symbol_track_points, s->symbol_track_plot, 0, 0, FL_RED, CA_NO_POINT);
//Fl::check();
return 0;
}
/*- End of function --------------------------------------------------------*/
int qam_monitor_update_audio_level(qam_monitor_t *s, const int16_t amp[], int len)
{
int i;
char buf[11];
double val;
for (i = 0; i < len; i++)
{
s->audio_meter->sample(amp[i]/32768.0);
s->power_reading += ((amp[i]*amp[i] - s->power_reading) >> 10);
}
val = 10.0*log10((double) s->power_reading/(32767.0*32767.0) + 1.0e-10) + 3.14 + 3.02;
snprintf(buf, sizeof(buf), "%5.1fdBm0", val);
s->audio_level->value(buf);
return 0;
}
/*- End of function --------------------------------------------------------*/
int qam_monitor_update_carrier_tracking(qam_monitor_t *s, float carrier_freq)
{
int i;
int j;
float min;
float max;
s->carrier_tracker[s->carrier_ptr++] = carrier_freq;
if (s->carrier_points < CARRIER_TRACKER_POINTS)
s->carrier_points++;
if (s->carrier_ptr >= CARRIER_TRACKER_POINTS)
s->carrier_ptr = 0;
s->canvas_track->current(s->canvas_track);
if (s->carrier)
delete s->carrier;
s->track_x->current();
s->carrier_y->current();
min =
max = s->carrier_tracker[0];
for (i = s->carrier_ptr, j = 0; i < s->carrier_points; i++, j++)
{
s->carrier_plot[2*j] = j;
s->carrier_plot[2*j + 1] = s->carrier_tracker[i];
if (min > s->carrier_tracker[i])
min = s->carrier_tracker[i];
if (max < s->carrier_tracker[i])
max = s->carrier_tracker[i];
}
for (i = 0; i < s->carrier_ptr; i++, j++)
{
s->carrier_plot[2*j] = j;
s->carrier_plot[2*j + 1] = s->carrier_tracker[i];
if (min > s->carrier_tracker[i])
min = s->carrier_tracker[i];
if (max < s->carrier_tracker[i])
max = s->carrier_tracker[i];
}
s->carrier_y->maximum((fabs(max - min) < 0.05) ? max + 0.05 : max);
s->carrier_y->minimum(min);
s->carrier = new Ca_Line(s->carrier_points, s->carrier_plot, 0, 0, FL_BLUE, CA_NO_POINT);
//Fl::check();
return 0;
}
/*- End of function --------------------------------------------------------*/
qam_monitor_t *qam_monitor_init(float constel_width, float constel_scaling, const char *tag)
{
char buf[132 + 1];
float x;
float y;
qam_monitor_t *s;
if ((s = (qam_monitor_t *) malloc(sizeof(*s))) == NULL)
return NULL;
s->w = new Fl_Double_Window(905, 400, (tag) ? tag : "QAM monitor");
s->constel_scaling = 1.0/constel_scaling;
s->c_const = new Fl_Group(0, 0, 380, 400);
s->c_const->box(FL_DOWN_BOX);
s->c_const->align(FL_ALIGN_TOP | FL_ALIGN_INSIDE);
s->canvas_const = new Ca_Canvas(60, 30, 300, 300, "Constellation");
s->canvas_const->box(FL_PLASTIC_DOWN_BOX);
s->canvas_const->color(7);
s->canvas_const->align(FL_ALIGN_TOP);
s->canvas_const->border(15);
s->sig_i = new Ca_X_Axis(65, 330, 290, 30, "I");
s->sig_i->align(FL_ALIGN_BOTTOM);
s->sig_i->minimum(-constel_width);
s->sig_i->maximum(constel_width);
s->sig_i->label_format("%g");
s->sig_i->minor_grid_color(fl_gray_ramp(20));
s->sig_i->major_grid_color(fl_gray_ramp(15));
s->sig_i->label_grid_color(fl_gray_ramp(10));
s->sig_i->grid_visible(CA_LABEL_GRID | CA_ALWAYS_VISIBLE);
s->sig_i->minor_grid_style(FL_DOT);
s->sig_i->major_step(5);
s->sig_i->label_step(1);
s->sig_i->axis_color(FL_BLACK);
s->sig_i->axis_align(CA_BOTTOM | CA_LINE);
s->sig_q = new Ca_Y_Axis(20, 35, 40, 290, "Q");
s->sig_q->align(FL_ALIGN_LEFT);
s->sig_q->minimum(-constel_width);
s->sig_q->maximum(constel_width);
s->sig_q->minor_grid_color(fl_gray_ramp(20));
s->sig_q->major_grid_color(fl_gray_ramp(15));
s->sig_q->label_grid_color(fl_gray_ramp(10));
//s->sig_q->grid_visible(CA_MINOR_TICK | CA_MAJOR_TICK | CA_LABEL_GRID | CA_ALWAYS_VISIBLE);
s->sig_q->grid_visible(CA_LABEL_GRID | CA_ALWAYS_VISIBLE);
s->sig_q->minor_grid_style(FL_DOT);
s->sig_q->major_step(5);
s->sig_q->label_step(1);
s->sig_q->axis_color(FL_BLACK);
s->sig_q->current();
s->c_const->end();
s->c_right = new Fl_Group(440, 0, 465, 405);
s->c_eq = new Fl_Group(380, 0, 265, 200);
s->c_eq->box(FL_DOWN_BOX);
s->c_eq->align(FL_ALIGN_TOP | FL_ALIGN_INSIDE);
s->c_eq->current();
s->canvas_eq = new Ca_Canvas(460, 35, 150, 100, "Equalizer");
s->canvas_eq->box(FL_PLASTIC_DOWN_BOX);
s->canvas_eq->color(7);
s->canvas_eq->align(FL_ALIGN_TOP);
Fl_Group::current()->resizable(s->canvas_eq);
s->canvas_eq->border(15);
s->eq_x = new Ca_X_Axis(465, 135, 140, 30, "Symbol");
s->eq_x->align(FL_ALIGN_BOTTOM);
s->eq_x->minimum(-8.0);
s->eq_x->maximum(8.0);
s->eq_x->label_format("%g");
s->eq_x->minor_grid_color(fl_gray_ramp(20));
s->eq_x->major_grid_color(fl_gray_ramp(15));
s->eq_x->label_grid_color(fl_gray_ramp(10));
s->eq_x->grid_visible(CA_LABEL_GRID | CA_ALWAYS_VISIBLE);
s->eq_x->minor_grid_style(FL_DOT);
s->eq_x->major_step(5);
s->eq_x->label_step(1);
s->eq_x->axis_align(CA_BOTTOM | CA_LINE);
s->eq_x->axis_color(FL_BLACK);
s->eq_x->current();
s->eq_y = new Ca_Y_Axis(420, 40, 40, 90, "Amp");
s->eq_y->align(FL_ALIGN_LEFT);
s->eq_y->minimum(-0.1);
s->eq_y->maximum(0.1);
s->eq_y->minor_grid_color(fl_gray_ramp(20));
s->eq_y->major_grid_color(fl_gray_ramp(15));
s->eq_y->label_grid_color(fl_gray_ramp(10));
s->eq_y->grid_visible(CA_LABEL_GRID | CA_ALWAYS_VISIBLE);
s->eq_y->minor_grid_style(FL_DOT);
s->eq_y->major_step(5);
s->eq_y->label_step(1);
s->eq_y->axis_color(FL_BLACK);
s->eq_y->current();
s->c_eq->end();
s->c_symbol_track = new Fl_Group(380, 200, 525, 200);
s->c_symbol_track->box(FL_DOWN_BOX);
s->c_symbol_track->align(FL_ALIGN_TOP | FL_ALIGN_INSIDE);
s->c_symbol_track->current();
s->canvas_track = new Ca_Canvas(490, 235, 300, 100, "Symbol and carrier tracking");
s->canvas_track->box(FL_PLASTIC_DOWN_BOX);
s->canvas_track->color(7);
s->canvas_track->align(FL_ALIGN_TOP);
Fl_Group::current()->resizable(s->canvas_track);
s->canvas_track->border(15);
s->track_x = new Ca_X_Axis(495, 335, 290, 30, "Time (symbols)");
s->track_x->align(FL_ALIGN_BOTTOM);
s->track_x->minimum(0.0);
s->track_x->maximum(2400.0*5.0);
s->track_x->label_format("%g");
s->track_x->minor_grid_color(fl_gray_ramp(20));
s->track_x->major_grid_color(fl_gray_ramp(15));
s->track_x->label_grid_color(fl_gray_ramp(10));
s->track_x->grid_visible(CA_LABEL_GRID | CA_ALWAYS_VISIBLE);
s->track_x->minor_grid_style(FL_DOT);
s->track_x->major_step(5);
s->track_x->label_step(1);
s->track_x->axis_align(CA_BOTTOM | CA_LINE);
s->track_x->axis_color(FL_BLACK);
s->track_x->current();
s->symbol_track_y = new Ca_Y_Axis(420, 240, 70, 90, "Cor");
s->symbol_track_y->align(FL_ALIGN_LEFT);
s->symbol_track_y->minimum(-0.1);
s->symbol_track_y->maximum(0.1);
s->symbol_track_y->minor_grid_color(fl_gray_ramp(20));
s->symbol_track_y->major_grid_color(fl_gray_ramp(15));
s->symbol_track_y->label_grid_color(fl_gray_ramp(10));
s->symbol_track_y->grid_visible(CA_LABEL_GRID | CA_ALWAYS_VISIBLE);
s->symbol_track_y->minor_grid_style(FL_DOT);
s->symbol_track_y->major_step(5);
s->symbol_track_y->label_step(1);
s->symbol_track_y->axis_color(FL_RED);
s->symbol_track_y->current();
s->carrier_y = new Ca_Y_Axis(790, 240, 70, 90, "Freq");
s->carrier_y->align(FL_ALIGN_RIGHT);
s->carrier_y->minimum(-0.1);
s->carrier_y->maximum(0.1);
s->carrier_y->minor_grid_color(fl_gray_ramp(20));
s->carrier_y->major_grid_color(fl_gray_ramp(15));
s->carrier_y->label_grid_color(fl_gray_ramp(10));
s->carrier_y->grid_visible(CA_LABEL_GRID | CA_ALWAYS_VISIBLE);
s->carrier_y->minor_grid_style(FL_DOT);
s->carrier_y->major_step(5);
s->carrier_y->label_step(1);
s->carrier_y->axis_align(CA_RIGHT);
s->carrier_y->axis_color(FL_BLUE);
s->carrier_y->current();
s->c_symbol_track->end();
s->audio_meter = new Fl_Audio_Meter(672, 10, 16, 150, "");
s->audio_meter->box(FL_PLASTIC_UP_BOX);
s->audio_meter->type(FL_VERT_AUDIO_METER);
s->audio_level = new Fl_Output(650, 170, 60, 20, "");
s->audio_level->textsize(10);
s->c_right->end();
Fl_Group::current()->resizable(s->c_right);
s->w->end();
s->w->show();
s->next_constel_point = 0;
s->constel_window = 10000;
s->carrier_points = 0;
s->carrier_ptr = 0;
s->carrier_window = 100;
s->symbol_track_points = 0;
s->symbol_track_window = 10000;
Fl::check();
return s;
}
/*- End of function --------------------------------------------------------*/
void qam_wait_to_end(qam_monitor_t *s)
{
fd_set rfds;
int res;
struct timeval tv;
fprintf(stderr, "Processing complete. Press the <enter> key to end\n");
do
{
usleep(100000);
Fl::check();
FD_ZERO(&rfds);
FD_SET(0, &rfds);
tv.tv_usec = 100000;
tv.tv_sec = 0;
res = select(1, &rfds, NULL, NULL, &tv);
}
while (res <= 0);
}
/*- End of function --------------------------------------------------------*/
#endif
/*- End of file ------------------------------------------------------------*/
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