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comparison spandsp-0.0.3/spandsp-0.0.3/tests/sig_tone_tests.c @ 5:f762bf195c4b

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import spandsp-0.0.3
author Peter Meerwald <pmeerw@cosy.sbg.ac.at>
date Fri, 25 Jun 2010 16:00:21 +0200
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4:26cd8f1ef0b1 5:f762bf195c4b
1 /*
2 * SpanDSP - a series of DSP components for telephony
3 *
4 * test_sig_tone.c
5 *
6 * Written by Steve Underwood <steveu@coppice.org>
7 *
8 * Copyright (C) 2004 Steve Underwood
9 *
10 * All rights reserved.
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License version 2, as
14 * published by the Free Software Foundation.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 *
25 * $Id: sig_tone_tests.c,v 1.15 2006/11/19 14:07:27 steveu Exp $
26 */
27
28 /*! \file */
29
30 /*! \page sig_tone_tests_page The signaling tone processor tests
31 \section sig_tone_tests_sec_1 What does it do?
32 ???.
33
34 \section sig_tone_tests_sec_2 How does it work?
35 ???.
36 */
37
38 #ifdef HAVE_CONFIG_H
39 #include "config.h"
40 #endif
41
42 #include <stdlib.h>
43 #include <stdio.h>
44 #include <inttypes.h>
45 #include <memory.h>
46 #if defined(HAVE_TGMATH_H)
47 #include <tgmath.h>
48 #endif
49 #if defined(HAVE_MATH_H)
50 #include <math.h>
51 #endif
52 #include <audiofile.h>
53 #include <tiffio.h>
54
55 #include "spandsp.h"
56
57 #define OUT_FILE_NAME "sig_tone.wav"
58
59 static int sampleno = 0;
60 static int tone_1_present = 0;
61 static int tone_2_present = 0;
62 static int ping = 0;
63
64 void map_frequency_response(sig_tone_state_t *s);
65
66 static int handler(void *user_data, int what)
67 {
68 //printf("What - %d\n", what);
69 if ((what & SIG_TONE_1_CHANGE))
70 {
71 tone_1_present = what & SIG_TONE_1_PRESENT;
72 printf("Tone 1 is %s after %d samples\n", (tone_1_present) ? "on" : "off", (what >> 16) & 0xFFFF);
73 }
74 /*endif*/
75 if ((what & SIG_TONE_2_CHANGE))
76 {
77 tone_2_present = what & SIG_TONE_2_PRESENT;
78 printf("Tone 2 is %s after %d samples\n", (tone_2_present) ? "on" : "off", (what >> 16) & 0xFFFF);
79 }
80 /*endif*/
81 if ((what & SIG_TONE_UPDATE_REQUEST))
82 {
83 /* The signaling processor wants to know what to do next */
84 if (sampleno < 800)
85 {
86 /* 100ms off-hook */
87 printf("100ms off-hook - %d samples\n", 800 - sampleno);
88 return 0x02 | ((800 - sampleno) << 16) | SIG_TONE_RX_PASSTHROUGH;
89 }
90 /*endif*/
91 if (sampleno < 4800)
92 {
93 /* 500ms idle */
94 printf("500ms idle - %d samples\n", 4800 - sampleno);
95 return 0x02 | SIG_TONE_1_PRESENT | ((4800 - sampleno) << 16) | SIG_TONE_RX_PASSTHROUGH;
96 }
97 /*endif*/
98 if (sampleno < 5600)
99 {
100 /* 100ms seize */
101 printf("100ms seize - %d samples\n", 5600 - sampleno);
102 return 0x02 | ((5600 - sampleno) << 16) | SIG_TONE_RX_PASSTHROUGH;
103 }
104 /*endif*/
105 if (ping)
106 {
107 printf("33ms break - 262 samples\n");
108 ping = !ping;
109 return 0x02 | (262 << 16) | SIG_TONE_RX_PASSTHROUGH;
110 }
111 else
112 {
113 printf("67ms make - 528 samples\n");
114 ping = !ping;
115 return 0x02 | SIG_TONE_1_PRESENT | (528 << 16) | SIG_TONE_RX_PASSTHROUGH;
116 }
117 /*endif*/
118 }
119 /*endif*/
120 return 0;
121 }
122 /*- End of function --------------------------------------------------------*/
123
124 void map_frequency_response(sig_tone_state_t *s)
125 {
126 int16_t buf[8192];
127 awgn_state_t noise_source;
128 int i;
129 int f;
130 uint32_t phase_acc;
131 int32_t phase_rate;
132 int32_t scaling;
133 double sum;
134
135 /* Things like noise don't highlight the frequency response of the high Q notch
136 very well. We use a slowly swept frequency to check it. */
137 awgn_init_dbm0(&noise_source, 1234567, -10.0f);
138 for (f = 1; f < 4000; f++)
139 {
140 phase_rate = dds_phase_rate(f);
141 scaling = dds_scaling_dbm0(-10);
142 phase_acc = 0;
143 for (i = 0; i < 8192; i++)
144 buf[i] = dds_mod(&phase_acc, phase_rate, scaling, 0);
145 /*endfor*/
146 sig_tone_rx(s, buf, 8192);
147 sum = 0.0;
148 for (i = 1000; i < 8192; i++)
149 sum += (double) buf[i]*(double) buf[i];
150 /*endfor*/
151 sum = sqrt(sum);
152 printf("%7d %f\n", f, sum);
153 }
154 /*endfor*/
155 }
156 /*- End of function --------------------------------------------------------*/
157
158 int main(int argc, char *argv[])
159 {
160 int16_t amp[160];
161 int16_t out_amp[2*160];
162 AFfilehandle outhandle;
163 AFfilesetup filesetup;
164 int outframes;
165 int i;
166 int rx_samples;
167 int tx_samples;
168 sig_tone_state_t state;
169 awgn_state_t noise_source;
170
171 filesetup = afNewFileSetup();
172 if (filesetup == AF_NULL_FILESETUP)
173 {
174 fprintf(stderr, " Failed to create file setup\n");
175 exit(2);
176 }
177 /*endif*/
178 afInitSampleFormat(filesetup, AF_DEFAULT_TRACK, AF_SAMPFMT_TWOSCOMP, 16);
179 afInitRate(filesetup, AF_DEFAULT_TRACK, (float) SAMPLE_RATE);
180 afInitFileFormat(filesetup, AF_FILE_WAVE);
181 afInitChannels(filesetup, AF_DEFAULT_TRACK, 2);
182
183 outhandle = afOpenFile(OUT_FILE_NAME, "w", filesetup);
184 if (outhandle == AF_NULL_FILEHANDLE)
185 {
186 fprintf(stderr, " Cannot create wave file '%s'\n", OUT_FILE_NAME);
187 exit(2);
188 }
189 /*endif*/
190
191 awgn_init_dbm0(&noise_source, 1234567, -30.0f);
192
193 printf("2400Hz/26000Hz tests.\n");
194 sig_tone_init(&state, SIG_TONE_2400HZ_2600HZ, handler, NULL);
195 state.current_tx_tone |= SIG_TONE_RX_PASSTHROUGH;
196
197 map_frequency_response(&state);
198
199 for (sampleno = 0; sampleno < 20000; sampleno += 160)
200 {
201 tx_samples = 160;
202 for (i = 0; i < tx_samples; i++)
203 amp[i] = alaw_to_linear(linear_to_alaw(awgn(&noise_source)));
204 /*endfor*/
205 for (i = 0; i < tx_samples; i++)
206 out_amp[2*i] = amp[i];
207 /*endfor*/
208 rx_samples = sig_tone_rx(&state, amp, tx_samples);
209 for (i = 0; i < rx_samples; i++)
210 out_amp[2*i + 1] = amp[i];
211 /*endfor*/
212 outframes = afWriteFrames(outhandle,
213 AF_DEFAULT_TRACK,
214 out_amp,
215 rx_samples);
216 if (outframes != rx_samples)
217 {
218 fprintf(stderr, " Error writing wave file\n");
219 exit(2);
220 }
221 /*endif*/
222 }
223
224 printf("2280Hz tests.\n");
225 sig_tone_init(&state, SIG_TONE_2280HZ, handler, NULL);
226 state.current_tx_tone |= SIG_TONE_RX_PASSTHROUGH;
227
228 map_frequency_response(&state);
229
230 for (sampleno = 0; sampleno < 20000; sampleno += 160)
231 {
232 memset(amp, 0, sizeof(int16_t)*160);
233 tx_samples = sig_tone_tx(&state, amp, 160);
234 for (i = 0; i < tx_samples; i++)
235 out_amp[2*i] = amp[i];
236 /*endfor*/
237 rx_samples = sig_tone_rx(&state, amp, tx_samples);
238 for (i = 0; i < rx_samples; i++)
239 out_amp[2*i + 1] = amp[i];
240 /*endfor*/
241 outframes = afWriteFrames(outhandle,
242 AF_DEFAULT_TRACK,
243 out_amp,
244 rx_samples);
245 if (outframes != rx_samples)
246 {
247 fprintf(stderr, " Error writing wave file\n");
248 exit(2);
249 }
250 /*endif*/
251 }
252 /*endfor*/
253 if (afCloseFile(outhandle) != 0)
254 {
255 fprintf(stderr, " Cannot close wave file '%s'\n", OUT_FILE_NAME);
256 exit(2);
257 }
258 /*endif*/
259 afFreeFileSetup(filesetup);
260
261 printf("Tests completed.\n");
262 return 0;
263 }
264 /*- End of function --------------------------------------------------------*/
265 /*- End of file ------------------------------------------------------------*/

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