retronetworking
/
freeswitch
13
0
Fork 0
Code Pull Requests Releases Activity
freeswitch/libs/spandsp/tests/line_model_tests.c

403 lines
11 KiB
C
Raw Blame History

/*
* SpanDSP - a series of DSP components for telephony
*
* line_model_tests.c - Tests for the telephone line model.
*
* 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.
*/
/*! \page line_model_tests_page Telephony line model tests
\section line_model_tests_page_sec_1 What does it do?
???.
\section line_model_tests_page_sec_2 How does it work?
???.
*/
#if defined(HAVE_CONFIG_H)
#include "config.h"
#endif
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <time.h>
#include <sndfile.h>
#define SPANDSP_EXPOSE_INTERNAL_STRUCTURES
#include "spandsp.h"
#include "spandsp-sim.h"
#if !defined(NULL)
#define NULL (void *) 0
#endif
#define BLOCK_LEN 160
#define OUT_FILE_COMPLEXIFY "complexify.wav"
#define IN_FILE_NAME1 "line_model_test_in1.wav"
#define IN_FILE_NAME2 "line_model_test_in2.wav"
#define OUT_FILE_NAME1 "line_model_one_way_test_out.wav"
#define OUT_FILE_NAME2 "line_model_two_way_test_out.wav"
int channel_codec;
int rbs_pattern;
static void complexify_tests(void)
{
complexify_state_t *s;
complexf_t cc;
int16_t amp;
int i;
SNDFILE *outhandle;
int outframes;
int16_t out[40000];
awgn_state_t noise1;
if ((outhandle = sf_open_telephony_write(OUT_FILE_COMPLEXIFY, 2)) == NULL)
{
fprintf(stderr, " Cannot create audio file '%s'\n", OUT_FILE_COMPLEXIFY);
exit(2);
}
awgn_init_dbm0(&noise1, 1234567, -10.0f);
s = complexify_init();
for (i = 0; i < 20000; i++)
{
amp = awgn(&noise1);
cc = complexify(s, amp);
out[2*i] = cc.re;
out[2*i + 1] = cc.im;
}
awgn_release(&noise1);
complexify_free(s);
outframes = sf_writef_short(outhandle, out, 20000);
if (outframes != 20000)
{
fprintf(stderr, " Error writing audio file\n");
exit(2);
}
if (sf_close_telephony(outhandle))
{
fprintf(stderr, " Cannot close audio file '%s'\n", OUT_FILE_COMPLEXIFY);
exit(2);
}
}
/*- End of function --------------------------------------------------------*/
static void test_one_way_model(int line_model_no, int speech_test)
{
one_way_line_model_state_t *model;
int16_t input1[BLOCK_LEN];
int16_t output1[BLOCK_LEN];
int16_t amp[2*BLOCK_LEN];
SNDFILE *inhandle1;
SNDFILE *outhandle;
int outframes;
int samples;
int i;
int j;
awgn_state_t noise1;
if ((model = one_way_line_model_init(line_model_no, -50, channel_codec, rbs_pattern)) == NULL)
{
fprintf(stderr, " Failed to create line model\n");
exit(2);
}
awgn_init_dbm0(&noise1, 1234567, -10.0f);
if (speech_test)
{
if ((inhandle1 = sf_open_telephony_read(IN_FILE_NAME1, 1)) == NULL)
{
fprintf(stderr, " Cannot open audio file '%s'\n", IN_FILE_NAME1);
exit(2);
}
}
else
{
inhandle1 = NULL;
}
if ((outhandle = sf_open_telephony_write(OUT_FILE_NAME1, 1)) == NULL)
{
fprintf(stderr, " Cannot create audio file '%s'\n", OUT_FILE_NAME1);
exit(2);
}
for (i = 0; i < 10000; i++)
{
if (speech_test)
{
samples = sf_readf_short(inhandle1, input1, BLOCK_LEN);
if (samples == 0)
break;
}
else
{
for (j = 0; j < BLOCK_LEN; j++)
input1[j] = awgn(&noise1);
samples = BLOCK_LEN;
}
for (j = 0; j < samples; j++)
{
one_way_line_model(model,
&output1[j],
&input1[j],
1);
amp[j] = output1[j];
}
outframes = sf_writef_short(outhandle, amp, samples);
if (outframes != samples)
{
fprintf(stderr, " Error writing audio file\n");
exit(2);
}
}
if (speech_test)
{
if (sf_close_telephony(inhandle1))
{
fprintf(stderr, " Cannot close audio file '%s'\n", IN_FILE_NAME1);
exit(2);
}
}
if (sf_close_telephony(outhandle))
{
fprintf(stderr, " Cannot close audio file '%s'\n", OUT_FILE_NAME1);
exit(2);
}
one_way_line_model_free(model);
}
/*- End of function --------------------------------------------------------*/
static void test_both_ways_model(int line_model_no, int speech_test)
{
both_ways_line_model_state_t *model;
int16_t input1[BLOCK_LEN];
int16_t input2[BLOCK_LEN];
int16_t output1[BLOCK_LEN];
int16_t output2[BLOCK_LEN];
int16_t amp[2*BLOCK_LEN];
SNDFILE *inhandle1;
SNDFILE *inhandle2;
SNDFILE *outhandle;
int outframes;
int samples;
int i;
int j;
awgn_state_t noise1;
awgn_state_t noise2;
if ((model = both_ways_line_model_init(line_model_no,
-50,
-15.0f,
-15.0f,
line_model_no + 1,
-35,
-15.0f,
-15.0f,
channel_codec,
rbs_pattern)) == NULL)
{
fprintf(stderr, " Failed to create line model\n");
exit(2);
}
awgn_init_dbm0(&noise1, 1234567, -10.0f);
awgn_init_dbm0(&noise2, 1234567, -10.0f);
if (speech_test)
{
if ((inhandle1 = sf_open_telephony_read(IN_FILE_NAME1, 1)) == NULL)
{
fprintf(stderr, " Cannot open audio file '%s'\n", IN_FILE_NAME1);
exit(2);
}
if ((inhandle2 = sf_open_telephony_read(IN_FILE_NAME2, 1)) == NULL)
{
fprintf(stderr, " Cannot open audio file '%s'\n", IN_FILE_NAME2);
exit(2);
}
}
else
{
inhandle1 =
inhandle2 = NULL;
}
if ((outhandle = sf_open_telephony_write(OUT_FILE_NAME2, 2)) == NULL)
{
fprintf(stderr, " Cannot create audio file '%s'\n", OUT_FILE_NAME2);
exit(2);
}
for (i = 0; i < 10000; i++)
{
if (speech_test)
{
samples = sf_readf_short(inhandle1, input1, BLOCK_LEN);
if (samples == 0)
break;
samples = sf_readf_short(inhandle2, input2, samples);
if (samples == 0)
break;
}
else
{
for (j = 0; j < BLOCK_LEN; j++)
{
input1[j] = awgn(&noise1);
input2[j] = awgn(&noise2);
}
samples = BLOCK_LEN;
}
for (j = 0; j < samples; j++)
{
both_ways_line_model(model,
&output1[j],
&input1[j],
&output2[j],
&input2[j],
1);
amp[2*j] = output1[j];
amp[2*j + 1] = output2[j];
}
outframes = sf_writef_short(outhandle, amp, samples);
if (outframes != samples)
{
fprintf(stderr, " Error writing audio file\n");
exit(2);
}
}
if (speech_test)
{
if (sf_close_telephony(inhandle1))
{
fprintf(stderr, " Cannot close audio file '%s'\n", IN_FILE_NAME1);
exit(2);
}
if (sf_close_telephony(inhandle2))
{
fprintf(stderr, " Cannot close audio file '%s'\n", IN_FILE_NAME2);
exit(2);
}
}
if (sf_close_telephony(outhandle))
{
fprintf(stderr, " Cannot close audio file '%s'\n", OUT_FILE_NAME2);
exit(2);
}
both_ways_line_model_free(model);
}
/*- End of function --------------------------------------------------------*/
static void test_line_filter(int line_model_no)
{
float out;
double sumin;
double sumout;
double gain;
int i;
int j;
int p;
int ptr;
int len;
swept_tone_state_t *s;
float filter[129];
int16_t buf[BLOCK_LEN];
s = swept_tone_init(NULL, 200.0f, 3900.0f, -10.0f, 120*SAMPLE_RATE, 0);
for (j = 0; j < 129; j++)
filter[j] = 0.0f;
ptr = 0;
for (;;)
{
if ((len = swept_tone(s, buf, BLOCK_LEN)) <= 0)
break;
sumin = 0.0;
sumout = 0.0;
for (i = 0; i < len; i++)
{
/* Add the sample in the filter buffer */
p = ptr;
filter[p] = buf[i];
if (++p == 129)
p = 0;
ptr = p;
/* Apply the filter */
out = 0.0f;
for (j = 0; j < 129; j++)
{
out += line_models[line_model_no][128 - j]*filter[p];
if (++p >= 129)
p = 0;
}
sumin += buf[i]*buf[i];
sumout += out*out;
}
/*endfor*/
gain = (sumin != 0.0) ? 10.0*log10(sumout/sumin + 1.0e-10) : 0.0;
printf("%7.1f %f\n", swept_tone_current_frequency(s), gain);
}
/*endfor*/
swept_tone_free(s);
}
/*- End of function --------------------------------------------------------*/
int main(int argc, char *argv[])
{
int line_model_no;
int opt;
bool speech_test;
channel_codec = MUNGE_CODEC_NONE;
line_model_no = 0;
rbs_pattern = 0;
speech_test = false;
while ((opt = getopt(argc, argv, "c:m:r:s:")) != -1)
{
switch (opt)
{
case 'c':
channel_codec = atoi(optarg);
break;
case 'm':
line_model_no = atoi(optarg);
break;
case 'r':
rbs_pattern = atoi(optarg);
break;
case 's':
speech_test = atoi(optarg);
break;
default:
//usage();
exit(2);
}
}
complexify_tests();
test_one_way_model(line_model_no, speech_test);
test_both_ways_model(line_model_no, speech_test);
test_line_filter(line_model_no);
}
/*- End of function --------------------------------------------------------*/
/*- End of file ------------------------------------------------------------*/
View Git Blame Copy Permalink