int r2_mf_tx(r2_mf_tx_state_t *s, int16_t amp[], int samples, int fwd, char digit)
{
int len;
char *cp;
len = 0;
if ((digit & 0x80))
{
/* Continue generating the tone we started earlier. */
len = tone_gen(&s->tone, amp, samples);
}
else if (digit == 0)
{
len = samples;
memset(amp, 0, len*sizeof(int16_t));
}
else
{
if ((cp = strchr(r2_mf_tone_codes, digit)))
{
if (fwd)
tone_gen_init(&s->tone, &r2_mf_fwd_digit_tones[cp - r2_mf_tone_codes]);
else
tone_gen_init(&s->tone, &r2_mf_back_digit_tones[cp - r2_mf_tone_codes]);
len = tone_gen(&s->tone, amp, samples);
}
else
{
len = samples;
memset(amp, 0, len*sizeof(int16_t));
}
}
return len;
}
SPAN_DECLARE(int) dtmf_tx(dtmf_tx_state_t *s, int16_t amp[], int max_samples)
{
int len;
const char *cp;
int digit;
len = 0;
if (s->tones.current_section >= 0)
{
/* Deal with the fragment left over from last time */
len = tone_gen(&(s->tones), amp, max_samples);
}
while (len < max_samples && (digit = queue_read_byte(&s->queue.queue)) >= 0)
{
/* Step to the next digit */
if (digit == 0)
continue;
if ((cp = strchr(dtmf_positions, digit)) == NULL)
continue;
tone_gen_init(&(s->tones), &dtmf_digit_tones[cp - dtmf_positions]);
s->tones.tone[0].gain = s->low_level;
s->tones.tone[1].gain = s->high_level;
s->tones.duration[0] = s->on_time;
s->tones.duration[1] = s->off_time;
len += tone_gen(&(s->tones), amp + len, max_samples - len);
}
return len;
}
int bell_mf_tx(bell_mf_tx_state_t *s, int16_t amp[], int max_samples)
{
int len;
size_t dig;
char *cp;
len = 0;
if (s->tones.current_section >= 0)
{
/* Deal with the fragment left over from last time */
len = tone_gen(&(s->tones), amp, max_samples);
}
dig = 0;
while (dig < s->current_digits && len < max_samples)
{
/* Step to the next digit */
if ((cp = strchr(bell_mf_tone_codes, s->digits[dig++])) == NULL)
continue;
tone_gen_init(&(s->tones), &(s->tone_descriptors[cp - bell_mf_tone_codes]));
len += tone_gen(&(s->tones), amp + len, max_samples - len);
}
if (dig)
{
/* Shift out the consumed digits */
s->current_digits -= dig;
memmove(s->digits, s->digits + dig, s->current_digits);
}
return len;
}
SPAN_DECLARE(int) bell_mf_tx(bell_mf_tx_state_t *s, int16_t amp[], int max_samples)
{
int len;
const char *cp;
int digit;
len = 0;
if (s->tones.current_section >= 0)
{
/* Deal with the fragment left over from last time */
len = tone_gen(&(s->tones), amp, max_samples);
}
while (len < max_samples && (digit = queue_read_byte(&s->queue.queue)) >= 0)
{
/* Step to the next digit */
if ((cp = strchr(bell_mf_tone_codes, digit)) == NULL)
continue;
tone_gen_init(&(s->tones), &bell_mf_digit_tones[cp - bell_mf_tone_codes]);
len += tone_gen(&(s->tones), amp + len, max_samples - len);
}
return len;
}
static int my_mf_generate(int16_t amp[], char digit)
{
int len;
char *cp;
tone_gen_state_t tone;
len = 0;
if ((cp = strchr(r2_mf_tone_codes, digit)))
{
tone_gen_init(&tone, &my_mf_digit_tones[cp - r2_mf_tone_codes]);
len += tone_gen(&tone, amp + len, 9999);
}
return len;
}
static int playtones_generator(struct cw_channel *chan, void *data, int samples)
{
struct playtones_state *ps = data;
struct playtones_item *pi;
int len;
int x;
/*
* We need to prepare a frame with 16 * timelen samples as we're
* generating SLIN audio
*/
len = samples + samples;
if (len > sizeof(ps->data)/sizeof(int16_t) - 1)
{
cw_log(LOG_WARNING, "Can't generate that much data!\n");
return -1;
}
x = tone_gen(&ps->tone_state, ps->data, samples);
pi = &ps->items[ps->npos];
/* Assemble frame */
cw_fr_init_ex(&ps->f, CW_FRAME_VOICE, CW_FORMAT_SLINEAR, NULL);
ps->f.datalen = len;
ps->f.samples = samples;
ps->f.offset = CW_FRIENDLY_OFFSET;
ps->f.data = ps->data;
cw_write(chan, &ps->f);
ps->pos += x;
if (pi->duration && ps->pos >= pi->duration*8)
{
/* item finished? */
ps->pos = 0; /* start new item */
ps->npos++;
if (ps->npos >= ps->nitems)
{
/* last item */
if (ps->reppos == -1) /* repeat set? */
return -1;
ps->npos = ps->reppos; /* redo from top */
}
/* Prepare the tone generator for more */
pi = &ps->items[ps->npos];
tone_setup(ps, pi);
}
return 0;
}
SPAN_DECLARE(int) r2_mf_tx(r2_mf_tx_state_t *s, int16_t amp[], int samples)
{
int len;
if (s->digit == 0)
{
len = samples;
memset(amp, 0, len*sizeof(int16_t));
}
else
{
len = tone_gen(&s->tone, amp, samples);
}
return len;
}
static int my_mf_generate(int16_t amp[], const char *digits)
{
int len;
char *cp;
tone_gen_state_t tone;
len = 0;
while (*digits)
{
if ((cp = strchr(bell_mf_tone_codes, *digits)))
{
tone_gen_init(&tone, &my_mf_digit_tones[cp - bell_mf_tone_codes]);
len += tone_gen(&tone, amp + len, 9999);
}
digits++;
}
return len;
}
int main(int argc, char *argv[])
{
fsk_tx_state_t *caller_tx;
fsk_rx_state_t *caller_rx;
fsk_tx_state_t *answerer_tx;
fsk_rx_state_t *answerer_rx;
bert_state_t caller_bert;
bert_state_t answerer_bert;
bert_results_t bert_results;
power_meter_t caller_meter;
power_meter_t answerer_meter;
int16_t caller_amp[BLOCK_LEN];
int16_t answerer_amp[BLOCK_LEN];
int16_t caller_model_amp[BLOCK_LEN];
int16_t answerer_model_amp[BLOCK_LEN];
int16_t out_amp[2*BLOCK_LEN];
AFfilehandle inhandle;
AFfilehandle outhandle;
int outframes;
int i;
int j;
int samples;
int test_bps;
int noise_level;
int noise_sweep;
int bits_per_test;
int line_model_no;
int modem_under_test_1;
int modem_under_test_2;
int modems_set;
int log_audio;
int channel_codec;
int rbs_pattern;
int on_at;
int off_at;
tone_gen_descriptor_t tone_desc;
tone_gen_state_t tone_tx;
int opt;
channel_codec = MUNGE_CODEC_NONE;
rbs_pattern = 0;
line_model_no = 0;
decode_test_file = NULL;
noise_sweep = FALSE;
modem_under_test_1 = FSK_V21CH1;
modem_under_test_2 = FSK_V21CH2;
log_audio = FALSE;
modems_set = 0;
while ((opt = getopt(argc, argv, "c:dlm:nr:s:")) != -1)
{
switch (opt)
{
case 'c':
channel_codec = atoi(optarg);
break;
case 'd':
decode_test_file = optarg;
break;
case 'l':
log_audio = TRUE;
break;
case 'm':
line_model_no = atoi(optarg);
break;
case 'n':
noise_sweep = TRUE;
break;
case 'r':
rbs_pattern = atoi(optarg);
break;
case 's':
switch (modems_set++)
{
case 0:
modem_under_test_1 = atoi(optarg);
break;
case 1:
modem_under_test_2 = atoi(optarg);
break;
}
break;
default:
//usage();
exit(2);
break;
}
}
if (modem_under_test_1 >= 0)
printf("Modem channel 1 is '%s'\n", preset_fsk_specs[modem_under_test_1].name);
if (modem_under_test_2 >= 0)
printf("Modem channel 2 is '%s'\n", preset_fsk_specs[modem_under_test_2].name);
outhandle = AF_NULL_FILEHANDLE;
if (log_audio)
{
if ((outhandle = afOpenFile_telephony_write(OUTPUT_FILE_NAME, 2)) == AF_NULL_FILEHANDLE)
{
fprintf(stderr, " Cannot create wave file '%s'\n", OUTPUT_FILE_NAME);
exit(2);
}
}
noise_level = -200;
bits_per_test = 0;
inhandle = NULL;
memset(caller_amp, 0, sizeof(*caller_amp));
memset(answerer_amp, 0, sizeof(*answerer_amp));
memset(caller_model_amp, 0, sizeof(*caller_model_amp));
memset(answerer_model_amp, 0, sizeof(*answerer_model_amp));
power_meter_init(&caller_meter, 7);
power_meter_init(&answerer_meter, 7);
if (decode_test_file)
{
if ((inhandle = afOpenFile_telephony_read(decode_test_file, 1)) == AF_NULL_FILEHANDLE)
{
fprintf(stderr, " Cannot open wave file '%s'\n", decode_test_file);
exit(2);
}
caller_rx = fsk_rx_init(NULL, &preset_fsk_specs[modem_under_test_1], TRUE, put_bit, NULL);
fsk_rx_set_modem_status_handler(caller_rx, rx_status, (void *) &caller_rx);
test_bps = preset_fsk_specs[modem_under_test_1].baud_rate;
for (;;)
{
samples = afReadFrames(inhandle,
AF_DEFAULT_TRACK,
caller_model_amp,
BLOCK_LEN);
if (samples < BLOCK_LEN)
break;
for (i = 0; i < samples; i++)
power_meter_update(&caller_meter, caller_model_amp[i]);
fsk_rx(caller_rx, caller_model_amp, samples);
}
if (afCloseFile(inhandle) != 0)
{
fprintf(stderr, " Cannot close wave file '%s'\n", decode_test_file);
exit(2);
}
}
else
{
printf("Test cutoff level\n");
caller_rx = fsk_rx_init(NULL, &preset_fsk_specs[modem_under_test_1], TRUE, cutoff_test_put_bit, NULL);
fsk_rx_signal_cutoff(caller_rx, -30.0f);
fsk_rx_set_modem_status_handler(caller_rx, cutoff_test_rx_status, (void *) &caller_rx);
on_at = 0;
for (i = -40; i < -25; i++)
{
make_tone_gen_descriptor(&tone_desc,
1500,
i,
0,
0,
1,
0,
0,
0,
TRUE);
tone_gen_init(&tone_tx, &tone_desc);
for (j = 0; j < 10; j++)
{
samples = tone_gen(&tone_tx, caller_model_amp, 160);
fsk_rx(caller_rx, caller_model_amp, samples);
}
if (cutoff_test_carrier)
break;
}
on_at = i;
off_at = 0;
for ( ; i > -40; i--)
{
make_tone_gen_descriptor(&tone_desc,
1500,
i,
0,
0,
1,
0,
0,
0,
TRUE);
tone_gen_init(&tone_tx, &tone_desc);
for (j = 0; j < 10; j++)
{
samples = tone_gen(&tone_tx, caller_model_amp, 160);
fsk_rx(caller_rx, caller_model_amp, samples);
}
if (!cutoff_test_carrier)
break;
}
off_at = i;
printf("Carrier on at %d, off at %d\n", on_at, off_at);
if (on_at < -29 || on_at > -26
||
off_at < -35 || off_at > -31)
{
printf("Tests failed.\n");
exit(2);
}
printf("Test with BERT\n");
test_bps = preset_fsk_specs[modem_under_test_1].baud_rate;
if (modem_under_test_1 >= 0)
{
caller_tx = fsk_tx_init(NULL, &preset_fsk_specs[modem_under_test_1], (get_bit_func_t) bert_get_bit, &caller_bert);
fsk_tx_set_modem_status_handler(caller_tx, tx_status, (void *) &caller_tx);
answerer_rx = fsk_rx_init(NULL, &preset_fsk_specs[modem_under_test_1], TRUE, (put_bit_func_t) bert_put_bit, &answerer_bert);
fsk_rx_set_modem_status_handler(answerer_rx, rx_status, (void *) &answerer_rx);
}
if (modem_under_test_2 >= 0)
{
answerer_tx = fsk_tx_init(NULL, &preset_fsk_specs[modem_under_test_2], (get_bit_func_t) bert_get_bit, &answerer_bert);
fsk_tx_set_modem_status_handler(answerer_tx, tx_status, (void *) &answerer_tx);
caller_rx = fsk_rx_init(NULL, &preset_fsk_specs[modem_under_test_2], TRUE, (put_bit_func_t) bert_put_bit, &caller_bert);
fsk_rx_set_modem_status_handler(caller_rx, rx_status, (void *) &caller_rx);
}
test_bps = preset_fsk_specs[modem_under_test_1].baud_rate;
bits_per_test = 500000;
noise_level = -24;
bert_init(&caller_bert, bits_per_test, BERT_PATTERN_ITU_O152_11, test_bps, 20);
bert_set_report(&caller_bert, 100000, reporter, (void *) (intptr_t) 1);
bert_init(&answerer_bert, bits_per_test, BERT_PATTERN_ITU_O152_11, test_bps, 20);
bert_set_report(&answerer_bert, 100000, reporter, (void *) (intptr_t) 2);
if ((model = both_ways_line_model_init(line_model_no, (float) noise_level, line_model_no, (float) noise_level, channel_codec, rbs_pattern)) == NULL)
{
fprintf(stderr, " Failed to create line model\n");
exit(2);
}
for (;;)
{
samples = fsk_tx(caller_tx, caller_amp, BLOCK_LEN);
for (i = 0; i < samples; i++)
power_meter_update(&caller_meter, caller_amp[i]);
samples = fsk_tx(answerer_tx, answerer_amp, BLOCK_LEN);
for (i = 0; i < samples; i++)
power_meter_update(&answerer_meter, answerer_amp[i]);
both_ways_line_model(model,
caller_model_amp,
caller_amp,
answerer_model_amp,
answerer_amp,
samples);
//printf("Powers %10.5fdBm0 %10.5fdBm0\n", power_meter_current_dbm0(&caller_meter), power_meter_current_dbm0(&answerer_meter));
fsk_rx(answerer_rx, caller_model_amp, samples);
for (i = 0; i < samples; i++)
out_amp[2*i] = caller_model_amp[i];
for ( ; i < BLOCK_LEN; i++)
out_amp[2*i] = 0;
fsk_rx(caller_rx, answerer_model_amp, samples);
for (i = 0; i < samples; i++)
out_amp[2*i + 1] = answerer_model_amp[i];
for ( ; i < BLOCK_LEN; i++)
out_amp[2*i + 1] = 0;
if (log_audio)
{
outframes = afWriteFrames(outhandle,
AF_DEFAULT_TRACK,
out_amp,
BLOCK_LEN);
if (outframes != BLOCK_LEN)
{
fprintf(stderr, " Error writing wave file\n");
exit(2);
}
}
if (samples < BLOCK_LEN)
{
bert_result(&caller_bert, &bert_results);
fprintf(stderr, "%ddB AWGN, %d bits, %d bad bits, %d resyncs\n", noise_level, bert_results.total_bits, bert_results.bad_bits, bert_results.resyncs);
if (!noise_sweep)
{
if (bert_results.total_bits != bits_per_test - 43
||
bert_results.bad_bits != 0
||
bert_results.resyncs != 0)
{
printf("Tests failed.\n");
exit(2);
}
}
bert_result(&answerer_bert, &bert_results);
fprintf(stderr, "%ddB AWGN, %d bits, %d bad bits, %d resyncs\n", noise_level, bert_results.total_bits, bert_results.bad_bits, bert_results.resyncs);
if (!noise_sweep)
{
if (bert_results.total_bits != bits_per_test - 43
||
bert_results.bad_bits != 0
||
bert_results.resyncs != 0)
{
printf("Tests failed.\n");
exit(2);
}
break;
}
/* Put a little silence between the chunks in the file. */
memset(out_amp, 0, sizeof(out_amp));
if (log_audio)
{
for (i = 0; i < 200; i++)
{
outframes = afWriteFrames(outhandle,
AF_DEFAULT_TRACK,
out_amp,
BLOCK_LEN);
}
}
if (modem_under_test_1 >= 0)
{
caller_tx = fsk_tx_init(NULL, &preset_fsk_specs[modem_under_test_1], (get_bit_func_t) bert_get_bit, &caller_bert);
fsk_tx_set_modem_status_handler(caller_tx, tx_status, (void *) &caller_tx);
answerer_rx = fsk_rx_init(NULL, &preset_fsk_specs[modem_under_test_1], TRUE, (put_bit_func_t) bert_put_bit, &answerer_bert);
fsk_rx_set_modem_status_handler(answerer_rx, rx_status, (void *) &answerer_rx);
}
if (modem_under_test_2 >= 0)
{
answerer_tx = fsk_tx_init(NULL, &preset_fsk_specs[modem_under_test_2], (get_bit_func_t) bert_get_bit, &answerer_bert);
fsk_tx_set_modem_status_handler(answerer_tx, tx_status, (void *) &answerer_tx);
caller_rx = fsk_rx_init(NULL, &preset_fsk_specs[modem_under_test_2], TRUE, (put_bit_func_t) bert_put_bit, &caller_bert);
fsk_rx_set_modem_status_handler(caller_rx, rx_status, (void *) &caller_rx);
}
noise_level++;
if ((model = both_ways_line_model_init(line_model_no, (float) noise_level, line_model_no, noise_level, channel_codec, 0)) == NULL)
{
fprintf(stderr, " Failed to create line model\n");
exit(2);
}
bert_init(&caller_bert, bits_per_test, BERT_PATTERN_ITU_O152_11, test_bps, 20);
bert_set_report(&caller_bert, 100000, reporter, (void *) (intptr_t) 1);
bert_init(&answerer_bert, bits_per_test, BERT_PATTERN_ITU_O152_11, test_bps, 20);
bert_set_report(&answerer_bert, 100000, reporter, (void *) (intptr_t) 2);
}
}
printf("Tests passed.\n");
}
if (log_audio)
{
if (afCloseFile(outhandle) != 0)
{
fprintf(stderr, " Cannot close wave file '%s'\n", OUTPUT_FILE_NAME);
exit(2);
}
}
return 0;
}
void one_way_line_model(one_way_line_model_state_t *s,
int16_t output[],
const int16_t input[],
int samples)
{
int i;
float in;
float out;
float out1;
int16_t amp[1];
/* The path being modelled is:
terminal
| < hybrid
|
| < noise and filtering
|
| < hybrid
CO
|
| < A-law distortion + bulk delay
|
CO
| < hybrid
|
| < noise and filtering
|
| < hybrid
terminal
*/
for (i = 0; i < samples; i++)
{
in = input[i];
/* Near end analogue section */
/* Line model filters & noise */
out = calc_near_line_filter(s, in);
/* Long distance digital section */
amp[0] = out;
codec_munge(s->munge, amp, 1);
out = amp[0];
/* Introduce the bulk delay of the long distance link. */
out1 = s->bulk_delay_buf[s->bulk_delay_ptr];
s->bulk_delay_buf[s->bulk_delay_ptr] = out;
out = out1;
if (++s->bulk_delay_ptr >= s->bulk_delay)
s->bulk_delay_ptr = 0;
/* Far end analogue section */
/* Line model filters & noise */
out = calc_far_line_filter(s, out);
if (s->mains_interference)
{
tone_gen(&s->mains_tone, amp, 1);
out += amp[0];
}
output[i] = out + s->dc_offset;
}
}
static int power_meter_tests(void)
{
awgn_state_t noise_source;
power_meter_t meter;
tone_gen_descriptor_t tone_desc;
tone_gen_state_t gen;
int i;
int idum = 1234567;
int16_t amp[1000];
int len;
int32_t level;
power_meter_init(&meter, 7);
printf("Testing with zero in the power register\n");
printf("Power: expected %fdBm0, got %fdBm0\n", -90.169f, power_meter_current_dbm0(&meter));
printf("Power: expected %fdBOv, got %fdBOv\n", -96.329f, power_meter_current_dbov(&meter));
printf("Testing with a square wave 10dB from maximum\n");
for (i = 0; i < 1000; i++)
{
amp[i] = (i & 1) ? 10362 : -10362;
level = power_meter_update(&meter, amp[i]);
//printf("%12d %fdBm0 %fdBov\n", level, power_meter_current_dbm0(&meter), power_meter_current_dbov(&meter));
}
printf("Level: expected %" PRId32 "/%" PRId32 ", got %" PRId32 "\n", power_meter_level_dbov(-10.0f), power_meter_level_dbm0(-10.0f + DBM0_MAX_POWER), level);
printf("Power: expected %fdBm0, got %fdBm0\n", -10.0f + DBM0_MAX_POWER, power_meter_current_dbm0(&meter));
printf("Power: expected %fdBOv, got %fdBOv\n", -10.0f, power_meter_current_dbov(&meter));
if (level < power_meter_level_dbov(-10.0f)*0.99f
||
level > power_meter_level_dbov(-10.0f)*1.01f)
{
printf("Test failed (level)\n");
exit(2);
}
if (0.1f < fabsf(power_meter_current_dbm0(&meter) + 10.0f - DBM0_MAX_POWER))
{
printf("Test failed (dBm0)\n");
exit(2);
}
if (0.1f < fabsf(power_meter_current_dbov(&meter) + 10.0))
{
printf("Test failed (dBOv)\n");
exit(2);
}
printf("Testing with a sine wave tone 10dB from maximum\n");
tone_gen_descriptor_init(&tone_desc,
1000,
-4,
0,
1,
1,
0,
0,
0,
true);
tone_gen_init(&gen, &tone_desc);
len = tone_gen(&gen, amp, 1000);
for (i = 0; i < len; i++)
{
level = power_meter_update(&meter, amp[i]);
//printf("%12d %fdBm0 %fdBov\n", level, power_meter_current_dbm0(&meter), power_meter_current_dbov(&meter));
}
printf("Level: expected %" PRId32 "/%" PRId32 ", got %" PRId32 "\n", power_meter_level_dbov(-10.0f), power_meter_level_dbm0(-10.0f + DBM0_MAX_POWER), level);
printf("Power: expected %fdBm0, got %fdBm0\n", -10.0f + DBM0_MAX_POWER, power_meter_current_dbm0(&meter));
printf("Power: expected %fdBOv, got %fdBOv\n", -10.0f, power_meter_current_dbov(&meter));
if (level < power_meter_level_dbov(-10.0f)*0.95f
||
level > power_meter_level_dbov(-10.0f)*1.05f)
{
printf("Test failed (level)\n");
exit(2);
}
if (0.2f < fabsf(power_meter_current_dbm0(&meter) + 10.0f - DBM0_MAX_POWER))
{
printf("Test failed (dBm0)\n");
exit(2);
}
if (0.2f < fabsf(power_meter_current_dbov(&meter) + 10.0))
{
printf("Test failed (dBOv)\n");
exit(2);
}
printf("Testing with AWGN 10dB from maximum\n");
awgn_init_dbov(&noise_source, idum, -10.0f);
for (i = 0; i < 1000; i++)
amp[i] = awgn(&noise_source);
for (i = 0; i < 1000; i++)
{
level = power_meter_update(&meter, amp[i]);
//printf("%12d %fdBm0 %fdBov\n", level, power_meter_current_dbm0(&meter), power_meter_current_dbov(&meter));
}
printf("Level: expected %" PRId32 "/%" PRId32 ", got %" PRId32 "\n", power_meter_level_dbov(-10.0f), power_meter_level_dbm0(-10.0f + DBM0_MAX_POWER), level);
printf("Power: expected %fdBm0, got %fdBm0\n", -10.0f + DBM0_MAX_POWER, power_meter_current_dbm0(&meter));
printf("Power: expected %fdBOv, got %fdBOv\n", -10.0f, power_meter_current_dbov(&meter));
if (level < power_meter_level_dbov(-10.0f)*0.95f
||
level > power_meter_level_dbov(-10.0f)*1.05f)
{
printf("Test failed (level)\n");
exit(2);
}
if (0.2f < fabsf(power_meter_current_dbm0(&meter) + 10.0f - DBM0_MAX_POWER))
{
printf("Test failed (dBm0)\n");
exit(2);
}
if (0.2f < fabsf(power_meter_current_dbov(&meter) + 10.0f))
{
printf("Test failed (dBOv)\n");
exit(2);
}
return 0;
}
int main(int argc, char *argv[])
{
int f;
int i;
int16_t amp[8000];
int16_t value;
int signal;
float power[10];
tone_gen_descriptor_t tone_desc;
tone_gen_state_t tone_state;
awgn_state_t noise_source;
fir32_state_t line_model_d2;
fir32_state_t line_model_d3;
fir32_state_t line_model_d4;
fir32_state_t line_model_d5;
fir32_state_t line_model_d6;
fir32_state_t line_model_d7;
fir32_state_t line_model_d8;
fir32_state_t line_model_d9;
fir_float_state_t level_measurement_bp;
signal_load(&local_css, "sound_c1_8k.wav");
signal_load(&far_css, "sound_c3_8k.wav");
fir32_create(&line_model_d2,
line_model_d2_coeffs,
sizeof(line_model_d2_coeffs)/sizeof(int32_t));
fir32_create(&line_model_d3,
line_model_d3_coeffs,
sizeof(line_model_d3_coeffs)/sizeof(int32_t));
fir32_create(&line_model_d4,
line_model_d4_coeffs,
sizeof(line_model_d4_coeffs)/sizeof(int32_t));
fir32_create(&line_model_d5,
line_model_d5_coeffs,
sizeof(line_model_d5_coeffs)/sizeof(int32_t));
fir32_create(&line_model_d6,
line_model_d6_coeffs,
sizeof(line_model_d6_coeffs)/sizeof(int32_t));
fir32_create(&line_model_d7,
line_model_d7_coeffs,
sizeof(line_model_d7_coeffs)/sizeof(int32_t));
fir32_create(&line_model_d8,
line_model_d8_coeffs,
sizeof(line_model_d8_coeffs)/sizeof(int32_t));
fir32_create(&line_model_d9,
line_model_d9_coeffs,
sizeof(line_model_d9_coeffs)/sizeof(int32_t));
fir_float_create(&level_measurement_bp,
level_measurement_bp_coeffs,
sizeof(level_measurement_bp_coeffs)/sizeof(float));
for (f = 10; f < 4000; f++)
{
tone_gen_descriptor_init(&tone_desc,
f,
-10,
0,
0,
1,
0,
0,
0,
true);
tone_gen_init(&tone_state, &tone_desc);
tone_gen(&tone_state, amp, 8000);
for (i = 0; i < 10; i++)
power[i] = 0.0f;
for (i = 0; i < 800; i++)
{
signal = fir32(&line_model_d2, amp[i]);
power[0] += ((signal*signal - power[0])/32.0f);
signal = fir32(&line_model_d3, amp[i]);
power[1] += ((signal*signal - power[1])/32.0f);
signal = fir32(&line_model_d4, amp[i]);
power[2] += ((signal*signal - power[2])/32.0f);
signal = fir32(&line_model_d5, amp[i]);
power[3] += ((signal*signal - power[3])/32.0f);
signal = fir32(&line_model_d6, amp[i]);
power[4] += ((signal*signal - power[4])/32.0f);
signal = fir32(&line_model_d7, amp[i]);
power[5] += ((signal*signal - power[5])/32.0f);
signal = fir32(&line_model_d8, amp[i]);
power[6] += ((signal*signal - power[6])/32.0f);
signal = fir32(&line_model_d9, amp[i]);
power[7] += ((signal*signal - power[7])/32.0f);
signal = fir_float(&level_measurement_bp, amp[i]);
power[8] += ((signal*signal - power[8])/32.0f);
signal = amp[i];
power[9] += ((signal*signal - power[9])/32.0f);
}
printf("%d %f %f %f %f %f %f %f %f %f %f\n",
f,
sqrt(power[0])*LINE_MODEL_D2_GAIN,
sqrt(power[1])*LINE_MODEL_D3_GAIN,
sqrt(power[2])*LINE_MODEL_D4_GAIN,
sqrt(power[3])*LINE_MODEL_D5_GAIN,
sqrt(power[4])*LINE_MODEL_D6_GAIN,
sqrt(power[5])*LINE_MODEL_D7_GAIN,
sqrt(power[6])*LINE_MODEL_D8_GAIN,
sqrt(power[7])*LINE_MODEL_D9_GAIN,
sqrt(power[8]),
sqrt(power[9]));
}
awgn_init_dbm0(&noise_source, 1234567, -20.0f);
for (i = 0; i < 10; i++)
power[i] = 0.0f;
signal_restart(&local_css, 0.0f);
signal_restart(&far_css, 0.0f);
for (i = 0; i < SAMPLE_RATE; i++)
{
value = signal_amp(&local_css);
//value = awgn(&noise_source);
signal = fir32(&line_model_d2, value);
power[0] += ((signal*signal - power[0])/32.0f);
signal = fir32(&line_model_d3, value);
power[1] += ((signal*signal - power[1])/32.0f);
signal = fir32(&line_model_d4, value);
power[2] += ((signal*signal - power[2])/32.0f);
signal = fir32(&line_model_d5, value);
power[3] += ((signal*signal - power[3])/32.0f);
signal = fir32(&line_model_d6, value);
power[4] += ((signal*signal - power[4])/32.0f);
signal = fir32(&line_model_d7, value);
power[5] += ((signal*signal - power[5])/32.0f);
signal = fir32(&line_model_d8, value);
power[6] += ((signal*signal - power[6])/32.0f);
signal = fir32(&line_model_d9, value);
power[7] += ((signal*signal - power[7])/32.0f);
signal = fir_float(&level_measurement_bp, value);
power[8] += ((signal*signal - power[8])/32.0f);
signal = value;
power[9] += ((signal*signal - power[9])/32.0f);
}
for (i = 0; i < 10; i++)
power[i] = 0.0f;
for (i = 0; i < SAMPLE_RATE; i++)
{
value = signal_amp(&local_css);
//value = awgn(&noise_source);
signal = fir32(&line_model_d2, value);
power[0] += ((signal*signal - power[0])/32.0f);
signal = fir32(&line_model_d3, value);
power[1] += ((signal*signal - power[1])/32.0f);
signal = fir32(&line_model_d4, value);
power[2] += ((signal*signal - power[2])/32.0f);
signal = fir32(&line_model_d5, value);
power[3] += ((signal*signal - power[3])/32.0f);
signal = fir32(&line_model_d6, value);
power[4] += ((signal*signal - power[4])/32.0f);
signal = fir32(&line_model_d7, value);
power[5] += ((signal*signal - power[5])/32.0f);
signal = fir32(&line_model_d8, value);
power[6] += ((signal*signal - power[6])/32.0f);
signal = fir32(&line_model_d9, value);
power[7] += ((signal*signal - power[7])/32.0f);
signal = fir_float(&level_measurement_bp, value);
power[8] += ((signal*signal - power[8])/32.0f);
signal = value;
power[9] += ((signal*signal - power[9])/32.0f);
}
printf("%d %f %f %f %f %f %f %f %f %f %f\n",
0,
sqrt(power[0])*LINE_MODEL_D2_GAIN,
sqrt(power[1])*LINE_MODEL_D3_GAIN,
sqrt(power[2])*LINE_MODEL_D4_GAIN,
sqrt(power[3])*LINE_MODEL_D5_GAIN,
sqrt(power[4])*LINE_MODEL_D6_GAIN,
sqrt(power[5])*LINE_MODEL_D7_GAIN,
sqrt(power[6])*LINE_MODEL_D8_GAIN,
sqrt(power[7])*LINE_MODEL_D9_GAIN,
sqrt(power[8]),
sqrt(power[9]));
printf("%d %f %f %f %f %f %f %f %f %f %f\n",
0,
sqrt(power[0]),
sqrt(power[1]),
sqrt(power[2]),
sqrt(power[3]),
sqrt(power[4]),
sqrt(power[5]),
sqrt(power[6]),
sqrt(power[7]),
sqrt(power[8]),
sqrt(power[9]));
printf("%d %f %f %f %f %f %f %f %f %f %f\n",
0,
sqrt(power[0])/sqrt(power[9]),
sqrt(power[1])/sqrt(power[9]),
sqrt(power[2])/sqrt(power[9]),
sqrt(power[3])/sqrt(power[9]),
sqrt(power[4])/sqrt(power[9]),
sqrt(power[5])/sqrt(power[9]),
sqrt(power[6])/sqrt(power[9]),
sqrt(power[7])/sqrt(power[9]),
sqrt(power[8]),
sqrt(power[9]));
printf("%d %f %f %f %f %f %f %f %f %f %f\n",
0,
sqrt(power[0])*LINE_MODEL_D2_GAIN/sqrt(power[9]),
sqrt(power[1])*LINE_MODEL_D3_GAIN/sqrt(power[9]),
sqrt(power[2])*LINE_MODEL_D4_GAIN/sqrt(power[9]),
sqrt(power[3])*LINE_MODEL_D5_GAIN/sqrt(power[9]),
sqrt(power[4])*LINE_MODEL_D6_GAIN/sqrt(power[9]),
sqrt(power[5])*LINE_MODEL_D7_GAIN/sqrt(power[9]),
sqrt(power[6])*LINE_MODEL_D8_GAIN/sqrt(power[9]),
sqrt(power[7])*LINE_MODEL_D9_GAIN/sqrt(power[9]),
sqrt(power[8]),
sqrt(power[9]));
for (i = 0; i < (int) (sizeof(css_c1)/sizeof(css_c1[0])); i++)
printf("%d\n", css_c1[i]);
printf("\n");
for (i = 0; i < (int) (sizeof(css_c1)/sizeof(css_c3[0])); i++)
printf("%d\n", css_c3[i]);
signal_free(&local_css);
signal_free(&far_css);
fir32_free(&line_model_d2);
fir32_free(&line_model_d3);
fir32_free(&line_model_d4);
fir32_free(&line_model_d5);
fir32_free(&line_model_d6);
fir32_free(&line_model_d7);
fir32_free(&line_model_d8);
fir32_free(&line_model_d9);
fir_float_free(&level_measurement_bp);
return 0;
}
int main(int argc, char *argv[])
{
tone_gen_descriptor_t tone_desc;
tone_gen_state_t tone_state;
int i;
int16_t amp[16384];
int len;
SNDFILE *outhandle;
int outframes;
if ((outhandle = sf_open_telephony_write(OUTPUT_FILE_NAME, 1)) == NULL)
{
fprintf(stderr, " Cannot open audio file '%s'\n", OUTPUT_FILE_NAME);
exit(2);
}
/* Try a tone pair */
tone_gen_descriptor_init(&tone_desc,
440,
-10,
620,
-15,
100,
200,
300,
400,
FALSE);
tone_gen_init(&tone_state, &tone_desc);
for (i = 0; i < 1000; i++)
{
len = tone_gen(&tone_state, amp, 160);
printf("Generated %d samples\n", len);
if (len <= 0)
break;
outframes = sf_writef_short(outhandle, amp, len);
}
/* Try a different tone pair */
tone_gen_descriptor_init(&tone_desc,
350,
-10,
440,
-15,
400,
300,
200,
100,
TRUE);
tone_gen_init(&tone_state, &tone_desc);
for (i = 0; i < 1000; i++)
{
len = tone_gen(&tone_state, amp, 160);
printf("Generated %d samples\n", len);
if (len <= 0)
break;
outframes = sf_writef_short(outhandle, amp, len);
}
/* Try a different tone pair */
tone_gen_descriptor_init(&tone_desc,
400,
-10,
450,
-10,
100,
200,
300,
400,
TRUE);
tone_gen_init(&tone_state, &tone_desc);
for (i = 0; i < 1000; i++)
{
len = tone_gen(&tone_state, amp, 160);
printf("Generated %d samples\n", len);
if (len <= 0)
break;
outframes = sf_writef_short(outhandle, amp, len);
}
/* Try a single tone */
tone_gen_descriptor_init(&tone_desc,
400,
-10,
0,
0,
100,
200,
300,
400,
TRUE);
tone_gen_init(&tone_state, &tone_desc);
for (i = 0; i < 1000; i++)
{
len = tone_gen(&tone_state, amp, 160);
printf("Generated %d samples\n", len);
if (len <= 0)
break;
outframes = sf_writef_short(outhandle, amp, len);
}
/* Try a single non-repeating tone */
tone_gen_descriptor_init(&tone_desc,
820,
-10,
0,
0,
2000,
0,
0,
0,
FALSE);
tone_gen_init(&tone_state, &tone_desc);
for (i = 0; i < 1000; i++)
{
len = tone_gen(&tone_state, amp, 160);
printf("Generated %d samples\n", len);
if (len <= 0)
break;
outframes = sf_writef_short(outhandle, amp, len);
}
/* Try a single non-repeating tone at 0dBm0 */
tone_gen_descriptor_init(&tone_desc,
820,
0,
0,
0,
2000,
0,
0,
0,
FALSE);
tone_gen_init(&tone_state, &tone_desc);
for (i = 0; i < 1000; i++)
{
len = tone_gen(&tone_state, amp, 160);
printf("Generated %d samples\n", len);
if (len <= 0)
break;
outframes = sf_writef_short(outhandle, amp, len);
}
/* Try an AM modulated tone at a modest modulation level (25%) */
tone_gen_descriptor_init(&tone_desc,
425,
-10,
-50,
25,
100,
200,
300,
400,
TRUE);
tone_gen_init(&tone_state, &tone_desc);
for (i = 0; i < 1000; i++)
{
len = tone_gen(&tone_state, amp, 160);
printf("Generated %d samples\n", len);
if (len <= 0)
break;
outframes = sf_writef_short(outhandle, amp, len);
}
/* Try an AM modulated tone at maximum modulation level (100%) */
tone_gen_descriptor_init(&tone_desc,
425,
-10,
-50,
100,
100,
200,
300,
400,
TRUE);
tone_gen_init(&tone_state, &tone_desc);
for (i = 0; i < 1000; i++)
{
len = tone_gen(&tone_state, amp, 160);
printf("Generated %d samples\n", len);
if (len <= 0)
break;
outframes = sf_writef_short(outhandle, amp, len);
}
if (sf_close(outhandle) != 0)
{
fprintf(stderr, " Cannot close audio file '%s'\n", OUTPUT_FILE_NAME);
exit (2);
}
return 0;
}
int main(int argc, char *argv[])
{
echo_can_state_t *ctx;
awgn_state_t local_noise_source;
awgn_state_t far_noise_source;
int i;
int clean;
int residue;
int16_t rx;
int16_t tx;
int j;
int k;
tone_gen_descriptor_t tone_desc;
tone_gen_state_t tone_state;
int16_t local_sound[40000];
int local_max;
int local_cur;
int16_t hoth_noise;
//int16_t far_sound[SAMPLE_RATE];
//int16_t result_sound[64000];
//int32_t coeffs[200][128];
//int coeff_index;
int far_cur;
int result_cur;
//int far_tx;
AFfilehandle resulthandle;
AFfilesetup filesetup;
AFfilesetup filesetup2;
//int outframes;
time_t now;
int tone_burst_step;
level_measurement_device_t *power_meter_1;
level_measurement_device_t *power_meter_2;
float pp1;
float pp2;
int model_number;
int use_gui;
power_meter_1 = NULL;
power_meter_2 = NULL;
/* Check which tests we should run */
if (argc < 2)
fprintf(stderr, "Usage: echo tests <list of test numbers>\n");
test_list = 0;
model_number = 0;
use_gui = FALSE;
for (i = 1; i < argc; i++)
{
if (strcasecmp(argv[i], "2a") == 0)
test_list |= PERFORM_TEST_2A;
else if (strcasecmp(argv[i], "2b") == 0)
test_list |= PERFORM_TEST_2B;
else if (strcasecmp(argv[i], "2c") == 0)
test_list |= PERFORM_TEST_2C;
else if (strcasecmp(argv[i], "3a") == 0)
test_list |= PERFORM_TEST_3A;
else if (strcasecmp(argv[i], "3b") == 0)
test_list |= PERFORM_TEST_3B;
else if (strcasecmp(argv[i], "3c") == 0)
test_list |= PERFORM_TEST_3C;
else if (strcasecmp(argv[i], "4") == 0)
test_list |= PERFORM_TEST_4;
else if (strcasecmp(argv[i], "5") == 0)
test_list |= PERFORM_TEST_5;
else if (strcasecmp(argv[i], "6") == 0)
test_list |= PERFORM_TEST_6;
else if (strcasecmp(argv[i], "7") == 0)
test_list |= PERFORM_TEST_7;
else if (strcasecmp(argv[i], "8") == 0)
test_list |= PERFORM_TEST_8;
else if (strcasecmp(argv[i], "9") == 0)
test_list |= PERFORM_TEST_9;
else if (strcasecmp(argv[i], "10a") == 0)
test_list |= PERFORM_TEST_10A;
else if (strcasecmp(argv[i], "10b") == 0)
test_list |= PERFORM_TEST_10B;
else if (strcasecmp(argv[i], "10c") == 0)
test_list |= PERFORM_TEST_10C;
else if (strcasecmp(argv[i], "11") == 0)
test_list |= PERFORM_TEST_11;
else if (strcasecmp(argv[i], "12") == 0)
test_list |= PERFORM_TEST_12;
else if (strcasecmp(argv[i], "13") == 0)
test_list |= PERFORM_TEST_13;
else if (strcasecmp(argv[i], "14") == 0)
test_list |= PERFORM_TEST_14;
else if (strcasecmp(argv[i], "15") == 0)
test_list |= PERFORM_TEST_15;
else if (strcmp(argv[i], "-m") == 0)
{
if (++i < argc)
model_number = atoi(argv[i]);
}
else if (strcmp(argv[i], "-g") == 0)
{
use_gui = TRUE;
}
else
{
fprintf(stderr, "Unknown test '%s' specified\n", argv[i]);
exit(2);
}
}
if (test_list == 0)
{
fprintf(stderr, "No tests have been selected\n");
exit(2);
}
time(&now);
tone_burst_step = 0;
ctx = echo_can_create(TEST_EC_TAPS, 0);
awgn_init_dbm0(&far_noise_source, 7162534, -50.0f);
signal_load(&local_css, "sound_c1_8k.wav");
signal_load(&far_css, "sound_c3_8k.wav");
filesetup = afNewFileSetup();
if (filesetup == AF_NULL_FILESETUP)
{
fprintf(stderr, " Failed to create file setup\n");
exit(2);
}
afInitSampleFormat(filesetup, AF_DEFAULT_TRACK, AF_SAMPFMT_TWOSCOMP, 16);
afInitRate(filesetup, AF_DEFAULT_TRACK, (float) SAMPLE_RATE);
afInitFileFormat(filesetup, AF_FILE_WAVE);
afInitChannels(filesetup, AF_DEFAULT_TRACK, 6);
filesetup2 = afNewFileSetup();
if (filesetup2 == AF_NULL_FILESETUP)
{
fprintf(stderr, " Failed to create file setup\n");
exit(2);
}
afInitSampleFormat(filesetup2, AF_DEFAULT_TRACK, AF_SAMPFMT_TWOSCOMP, 16);
afInitRate(filesetup2, AF_DEFAULT_TRACK, (float) SAMPLE_RATE);
afInitFileFormat(filesetup2, AF_FILE_WAVE);
afInitChannels(filesetup2, AF_DEFAULT_TRACK, 1);
resulthandle = afOpenFile("result_sound.wav", "w", filesetup);
if (resulthandle == AF_NULL_FILEHANDLE)
{
fprintf(stderr, " Failed to open result file\n");
exit(2);
}
residuehandle = afOpenFile("residue_sound.wav", "w", filesetup2);
if (residuehandle == AF_NULL_FILEHANDLE)
{
fprintf(stderr, " Failed to open residue file\n");
exit(2);
}
local_cur = 0;
far_cur = 0;
result_cur = 0;
if (channel_model_create(model_number))
{
fprintf(stderr, " Failed to create line model\n");
exit(2);
}
#if defined(ENABLE_GUI)
if (use_gui)
{
start_echo_can_monitor(TEST_EC_TAPS);
echo_can_monitor_line_model_update(line_model.coeffs, line_model.taps);
}
#endif
power_meter_1 = level_measurement_device_create(0);
power_meter_2 = level_measurement_device_create(0);
level_measurement_device(power_meter_1, 0);
#if 0
echo_can_flush(ctx);
/* Converge the canceller */
signal_restart(&local_css);
for (i = 0; i < 800*2; i++)
{
clean = echo_can_update(ctx, 0, 0);
put_residue(clean);
}
for (i = 0; i < SAMPLE_RATE*5; i++)
{
tx = signal_amp(&local_css);
channel_model(&tx, &rx, tx, 0);
clean = echo_can_update(ctx, tx, rx);
put_residue(clean);
}
echo_can_adaption_mode(ctx, ECHO_CAN_USE_ADAPTION | ECHO_CAN_USE_NLP | ECHO_CAN_USE_CNG);
for (i = 0; i < SAMPLE_RATE*5; i++)
{
tx = signal_amp(&local_css);
channel_model(&tx, &rx, tx, 0);
clean = echo_can_update(ctx, tx, rx);
put_residue(clean);
}
echo_can_adaption_mode(ctx, ECHO_CAN_USE_ADAPTION);
for (i = 0; i < SAMPLE_RATE*10; i++)
{
tx = signal_amp(&local_css);
#if 0
if ((i/10000)%10 == 9)
{
/* Inject a burst of far sound */
if (far_cur >= far_max)
{
far_max = afReadFrames(farhandle, AF_DEFAULT_TRACK, far_sound, SAMPLE_RATE);
if (far_max < 0)
{
fprintf(stderr, " Error reading far sound\n");
exit(2);
}
if (far_max == 0)
break;
far_cur = 0;
}
far_tx = far_sound[far_cur++];
}
else
{
far_tx = 0;
}
#else
far_sound[0] = 0;
far_tx = 0;
#endif
channel_model(&tx, &rx, tx, far_tx);
//rx += awgn(&far_noise_source);
//tx += awgn(&far_noise_source);
clean = echo_can_update(ctx, tx, rx);
#if defined(XYZZY)
if (i%SAMPLE_RATE == 0)
{
if (coeff_index < 200)
{
for (j = 0; j < ctx->taps; j++)
coeffs[coeff_index][j] = ctx->fir_taps32[j];
coeff_index++;
}
}
#endif
result_sound[result_cur++] = tx;
result_sound[result_cur++] = rx;
result_sound[result_cur++] = clean - far_tx;
//result_sound[result_cur++] = ctx->tx_power[2];
//result_sound[result_cur++] = ctx->tx_power[1];
result_sound[result_cur++] = (ctx->tx_power[1] > 64) ? SAMPLE_RATE : -SAMPLE_RATE;
//result_sound[result_cur++] = ctx->tap_set*SAMPLE_RATE;
//result_sound[result_cur++] = (ctx->nonupdate_dwell > 0) ? SAMPLE_RATE : -SAMPLE_RATE;
//result_sound[result_cur++] = ctx->latest_correction >> 8;
//result_sound[result_cur++] = level_measurement_device(tx)/(16.0*65536.0);
//result_sound[result_cur++] = level_measurement_device(tx)/4096.0;
result_sound[result_cur++] = (ctx->tx_power[1] > ctx->rx_power[0]) ? SAMPLE_RATE : -SAMPLE_RATE;
//result_sound[result_cur++] = (ctx->tx_power[1] > ctx->rx_power[0]) ? SAMPLE_RATE : -SAMPLE_RATE;
//result_sound[result_cur++] = (ctx->narrowband_score)*5; // ? SAMPLE_RATE : -SAMPLE_RATE;
//result_sound[result_cur++] = ctx->tap_rotate_counter*10;
result_sound[result_cur++] = ctx->vad;
put_residue(clean - far_tx);
if (result_cur >= 6*SAMPLE_RATE)
{
outframes = afWriteFrames(resulthandle,
AF_DEFAULT_TRACK,
result_sound,
result_cur/6);
if (outframes != result_cur/6)
{
fprintf(stderr, " Error writing result sound\n");
exit(2);
}
result_cur = 0;
}
}
if (result_cur > 0)
{
outframes = afWriteFrames(resulthandle,
AF_DEFAULT_TRACK,
result_sound,
result_cur/6);
if (outframes != result_cur/4)
{
fprintf(stderr, " Error writing result sound\n");
exit(2);
}
}
#endif
/* Test 1 - Steady state residual and returned echo level test */
/* This functionality has been merged with test 2 in newer versions of G.168,
so test 1 no longer exists. */
/* Test 2 - Convergence and steady state residual and returned echo level test */
if ((test_list & PERFORM_TEST_2A))
{
printf("Performing test 2A - Convergence with NLP enabled\n");
/* Test 2A - Convergence with NLP enabled */
echo_can_flush(ctx);
echo_can_adaption_mode(ctx, ECHO_CAN_USE_ADAPTION | ECHO_CAN_USE_NLP);
/* Converge the canceller */
signal_restart(&local_css);
for (i = 0; i < 800*2; i++)
{
clean = echo_can_update(ctx, 0, 0);
put_residue(clean);
}
for (i = 0; i < SAMPLE_RATE*50; i++)
{
tx = signal_amp(&local_css);
channel_model(&tx, &rx, tx, 0);
clean = echo_can_update(ctx, tx, rx);
pp1 = level_measurement_device(power_meter_1, rx);
pp2 = level_measurement_device(power_meter_2, clean);
residue = 100.0*pp1/pp2;
put_residue(residue);
#if defined(ENABLE_GUI)
if (use_gui)
echo_can_monitor_can_update(ctx->fir_taps16[ctx->tap_set], TEST_EC_TAPS);
#endif
}
#if defined(ENABLE_GUI)
if (use_gui)
echo_can_monitor_can_update(ctx->fir_taps16[ctx->tap_set], TEST_EC_TAPS);
#endif
}
if ((test_list & PERFORM_TEST_2B))
{
printf("Performing test 2B - Convergence with NLP disabled\n");
/* Test 2B - Convergence with NLP disabled */
echo_can_flush(ctx);
echo_can_adaption_mode(ctx, ECHO_CAN_USE_ADAPTION);
/* Converge a canceller */
signal_restart(&local_css);
for (i = 0; i < 800*2; i++)
{
clean = echo_can_update(ctx, 0, 0);
put_residue(clean);
}
for (i = 0; i < SAMPLE_RATE*5; i++)
{
tx = signal_amp(&local_css);
channel_model(&tx, &rx, tx, 0);
clean = echo_can_update(ctx, tx, rx);
put_residue(clean);
#if defined(ENABLE_GUI)
if (use_gui)
echo_can_monitor_can_update(ctx->fir_taps16[ctx->tap_set], TEST_EC_TAPS);
#endif
}
#if defined(ENABLE_GUI)
if (use_gui)
echo_can_monitor_can_update(ctx->fir_taps16[ctx->tap_set], TEST_EC_TAPS);
#endif
}
if ((test_list & PERFORM_TEST_2C))
{
printf("Performing test 2C - Convergence with background noise present\n");
/* Test 2C - Convergence with background noise present */
echo_can_flush(ctx);
echo_can_adaption_mode(ctx, ECHO_CAN_USE_ADAPTION);
/* Converge a canceller */
signal_restart(&local_css);
for (i = 0; i < 800*2; i++)
{
clean = echo_can_update(ctx, 0, 0);
put_residue(clean);
}
/* TODO: This uses a crude approx. to Hoth noise. We need the real thing. */
awgn_init_dbm0(&far_noise_source, 7162534, -40.0f);
hoth_noise = 0;
for (i = 0; i < SAMPLE_RATE*5; i++)
{
hoth_noise = hoth_noise*0.625 + awgn(&far_noise_source)*0.375;
tx = signal_amp(&local_css);
channel_model(&tx, &rx, tx, hoth_noise);
clean = echo_can_update(ctx, tx, rx);
put_residue(clean);
}
/* Now freeze adaption, and measure the echo. */
echo_can_adaption_mode(ctx, 0);
for (i = 0; i < SAMPLE_RATE*5; i++)
{
tx = signal_amp(&local_css);
channel_model(&tx, &rx, tx, 0);
clean = echo_can_update(ctx, tx, rx);
put_residue(clean);
}
echo_can_adaption_mode(ctx, ECHO_CAN_USE_ADAPTION);
#if defined(ENABLE_GUI)
if (use_gui)
echo_can_monitor_can_update(ctx->fir_taps16[ctx->tap_set], TEST_EC_TAPS);
#endif
}
/* Test 3 - Performance under double talk conditions */
if ((test_list & PERFORM_TEST_3A))
{
printf("Performing test 3A - Double talk test with low cancelled-end levels\n");
/* Test 3A - Double talk test with low cancelled-end levels */
echo_can_flush(ctx);
echo_can_adaption_mode(ctx, ECHO_CAN_USE_ADAPTION);
signal_restart(&local_css);
signal_restart(&far_css);
/* Apply double talk, with a weak far end signal */
for (i = 0; i < SAMPLE_RATE*5; i++)
{
tx = signal_amp(&local_css);
rx = signal_amp(&far_css)/20;
channel_model(&tx, &rx, tx, rx);
clean = echo_can_update(ctx, tx, rx);
put_residue(clean - rx);
}
/* Now freeze adaption. */
echo_can_adaption_mode(ctx, 0);
for (i = 0; i < 800*5; i++)
{
tx = signal_amp(&local_css);
channel_model(&tx, &rx, tx, 0);
clean = echo_can_update(ctx, tx, rx);
put_residue(clean);
}
/* Now measure the echo */
for (i = 0; i < SAMPLE_RATE*5; i++)
{
tx = signal_amp(&local_css);
channel_model(&tx, &rx, tx, 0);
clean = echo_can_update(ctx, tx, rx);
put_residue(clean);
}
echo_can_adaption_mode(ctx, ECHO_CAN_USE_ADAPTION);
#if defined(ENABLE_GUI)
if (use_gui)
echo_can_monitor_can_update(ctx->fir_taps16[ctx->tap_set], TEST_EC_TAPS);
#endif
}
if ((test_list & PERFORM_TEST_3B))
{
printf("Performing test 3B - Double talk test with high cancelled-end levels\n");
/* Test 3B - Double talk test with high cancelled-end levels */
echo_can_flush(ctx);
echo_can_adaption_mode(ctx, ECHO_CAN_USE_ADAPTION);
signal_restart(&local_css);
signal_restart(&far_css);
/* Converge the canceller */
for (i = 0; i < SAMPLE_RATE*5; i++)
{
tx = signal_amp(&local_css);
channel_model(&tx, &rx, tx, 0);
clean = echo_can_update(ctx, tx, rx);
put_residue(clean);
}
/* Apply double talk */
for (i = 0; i < SAMPLE_RATE*5; i++)
{
tx = signal_amp(&local_css);
rx = signal_amp(&far_css);
channel_model(&tx, &rx, tx, rx);
clean = echo_can_update(ctx, tx, rx);
put_residue(clean - rx);
}
/* Now freeze adaption. */
echo_can_adaption_mode(ctx, 0);
for (i = 0; i < 800*5; i++)
{
tx = signal_amp(&local_css);
channel_model(&tx, &rx, tx, 0);
clean = echo_can_update(ctx, tx, rx);
put_residue(clean);
}
/* Now measure the echo */
for (i = 0; i < SAMPLE_RATE*5; i++)
{
tx = signal_amp(&local_css);
channel_model(&tx, &rx, tx, 0);
clean = echo_can_update(ctx, tx, rx);
put_residue(clean);
}
echo_can_adaption_mode(ctx, ECHO_CAN_USE_ADAPTION);
#if defined(ENABLE_GUI)
if (use_gui)
echo_can_monitor_can_update(ctx->fir_taps16[ctx->tap_set], TEST_EC_TAPS);
#endif
}
if ((test_list & PERFORM_TEST_3C))
{
printf("Performing test 3C - Double talk test with simulated conversation\n");
/* Test 3C - Double talk test with simulated conversation */
echo_can_flush(ctx);
echo_can_adaption_mode(ctx, ECHO_CAN_USE_ADAPTION);
signal_restart(&local_css);
signal_restart(&far_css);
/* Apply double talk */
for (i = 0; i < 800*56; i++)
{
tx = signal_amp(&local_css);
rx = signal_amp(&far_css);
channel_model(&tx, &rx, tx, rx);
clean = echo_can_update(ctx, tx, rx);
put_residue(clean - rx);
}
/* Stop the far signal */
for (i = 0; i < 800*14; i++)
{
tx = signal_amp(&local_css);
channel_model(&tx, &rx, tx, 0);
clean = echo_can_update(ctx, tx, rx);
put_residue(clean);
}
/* Continue measuring the resulting echo */
for (i = 0; i < 800*50; i++)
{
tx = signal_amp(&local_css);
channel_model(&tx, &rx, tx, 0);
clean = echo_can_update(ctx, tx, rx);
put_residue(clean);
}
/* Reapply double talk */
signal_restart(&far_css);
for (i = 0; i < 800*56; i++)
{
tx = signal_amp(&local_css);
rx = signal_amp(&far_css);
channel_model(&tx, &rx, tx, rx);
clean = echo_can_update(ctx, tx, rx);
put_residue(clean - rx);
}
/* Now the far signal only */
for (i = 0; i < 800*56; i++)
{
tx = 0;
rx = signal_amp(&far_css);
channel_model(&tx, &rx, 0, rx);
clean = echo_can_update(ctx, tx, rx);
put_residue(clean - rx);
}
#if defined(ENABLE_GUI)
if (use_gui)
echo_can_monitor_can_update(ctx->fir_taps16[ctx->tap_set], TEST_EC_TAPS);
#endif
}
if ((test_list & PERFORM_TEST_4))
{
printf("Performing test 4 - Leak rate test\n");
/* Test 4 - Leak rate test */
echo_can_flush(ctx);
echo_can_adaption_mode(ctx, ECHO_CAN_USE_ADAPTION);
/* Converge a canceller */
signal_restart(&local_css);
for (i = 0; i < SAMPLE_RATE*5; i++)
{
tx = signal_amp(&local_css);
channel_model(&tx, &rx, tx, 0);
clean = echo_can_update(ctx, tx, rx);
put_residue(clean);
}
/* Put 2 minutes of silence through it */
for (i = 0; i < SAMPLE_RATE*120; i++)
{
clean = echo_can_update(ctx, 0, 0);
put_residue(clean);
}
/* Now freeze it, and check if it is still well adapted. */
echo_can_adaption_mode(ctx, 0);
for (i = 0; i < SAMPLE_RATE*5; i++)
{
tx = signal_amp(&local_css);
channel_model(&tx, &rx, tx, 0);
clean = echo_can_update(ctx, tx, rx);
put_residue(clean);
}
echo_can_adaption_mode(ctx, ECHO_CAN_USE_ADAPTION);
#if defined(ENABLE_GUI)
if (use_gui)
echo_can_monitor_can_update(ctx->fir_taps16[ctx->tap_set], TEST_EC_TAPS);
#endif
}
if ((test_list & PERFORM_TEST_5))
{
printf("Performing test 5 - Infinite return loss convergence test\n");
/* Test 5 - Infinite return loss convergence test */
echo_can_flush(ctx);
echo_can_adaption_mode(ctx, ECHO_CAN_USE_ADAPTION);
/* Converge the canceller */
signal_restart(&local_css);
for (i = 0; i < SAMPLE_RATE*5; i++)
{
tx = signal_amp(&local_css);
channel_model(&tx, &rx, tx, 0);
clean = echo_can_update(ctx, tx, rx);
put_residue(clean);
}
/* Now stop echoing, and see we don't do anything unpleasant as the
echo path is open looped. */
for (i = 0; i < SAMPLE_RATE*5; i++)
{
tx = signal_amp(&local_css);
rx = 0;
tx = codec_munge(tx);
clean = echo_can_update(ctx, tx, rx);
put_residue(clean);
}
#if defined(ENABLE_GUI)
if (use_gui)
echo_can_monitor_can_update(ctx->fir_taps16[ctx->tap_set], TEST_EC_TAPS);
#endif
}
if ((test_list & PERFORM_TEST_6))
{
printf("Performing test 6 - Non-divergence on narrow-band signals\n");
/* Test 6 - Non-divergence on narrow-band signals */
echo_can_flush(ctx);
echo_can_adaption_mode(ctx, ECHO_CAN_USE_ADAPTION);
/* Converge the canceller */
signal_restart(&local_css);
for (i = 0; i < SAMPLE_RATE*5; i++)
{
tx = signal_amp(&local_css);
channel_model(&tx, &rx, tx, 0);
clean = echo_can_update(ctx, tx, rx);
put_residue(clean);
}
/* Now put 5s bursts of a list of tones through the converged canceller, and check
that bothing unpleasant happens. */
for (k = 0; tones_6_4_2_7[k][0]; k++)
{
make_tone_gen_descriptor(&tone_desc,
tones_6_4_2_7[k][0],
-11,
tones_6_4_2_7[k][1],
-9,
1,
0,
0,
0,
1);
tone_gen_init(&tone_state, &tone_desc);
j = 0;
for (i = 0; i < 5; i++)
{
local_max = tone_gen(&tone_state, local_sound, SAMPLE_RATE);
for (j = 0; j < SAMPLE_RATE; j++)
{
tx = local_sound[j];
channel_model(&tx, &rx, tx, 0);
clean = echo_can_update(ctx, tx, rx);
put_residue(clean);
}
#if defined(ENABLE_GUI)
if (use_gui)
{
echo_can_monitor_can_update(ctx->fir_taps16[ctx->tap_set], TEST_EC_TAPS);
echo_can_monitor_update_display();
usleep(100000);
}
#endif
}
}
#if defined(ENABLE_GUI)
if (use_gui)
echo_can_monitor_can_update(ctx->fir_taps16[ctx->tap_set], TEST_EC_TAPS);
#endif
}
if ((test_list & PERFORM_TEST_7))
{
printf("Performing test 7 - Stability\n");
/* Test 7 - Stability */
/* Put tones through an unconverged canceller, and check nothing unpleasant
happens. */
echo_can_flush(ctx);
echo_can_adaption_mode(ctx, ECHO_CAN_USE_ADAPTION);
make_tone_gen_descriptor(&tone_desc,
tones_6_4_2_7[0][0],
-11,
tones_6_4_2_7[0][1],
-9,
1,
0,
0,
0,
1);
tone_gen_init(&tone_state, &tone_desc);
j = 0;
for (i = 0; i < 120; i++)
{
local_max = tone_gen(&tone_state, local_sound, SAMPLE_RATE);
for (j = 0; j < SAMPLE_RATE; j++)
{
tx = local_sound[j];
channel_model(&tx, &rx, tx, 0);
clean = echo_can_update(ctx, tx, rx);
put_residue(clean);
}
#if defined(ENABLE_GUI)
if (use_gui)
{
echo_can_monitor_can_update(ctx->fir_taps16[ctx->tap_set], TEST_EC_TAPS);
echo_can_monitor_update_display();
usleep(100000);
}
#endif
}
#if defined(ENABLE_GUI)
if (use_gui)
echo_can_monitor_can_update(ctx->fir_taps16[ctx->tap_set], TEST_EC_TAPS);
#endif
}
if ((test_list & PERFORM_TEST_8))
{
printf("Performing test 8 - Non-convergence on No 5, 6, and 7 in-band signalling\n");
/* Test 8 - Non-convergence on No 5, 6, and 7 in-band signalling */
fprintf(stderr, "Test 8 not yet implemented\n");
}
if ((test_list & PERFORM_TEST_9))
{
printf("Performing test 9 - Comfort noise test\n");
/* Test 9 - Comfort noise test */
/* Test 9 part 1 - matching */
echo_can_flush(ctx);
echo_can_adaption_mode(ctx, ECHO_CAN_USE_ADAPTION);
/* Converge the canceller */
signal_restart(&local_css);
for (i = 0; i < SAMPLE_RATE*5; i++)
{
tx = signal_amp(&local_css);
channel_model(&tx, &rx, tx, 0);
clean = echo_can_update(ctx, tx, rx);
put_residue(clean);
}
echo_can_adaption_mode(ctx, ECHO_CAN_USE_ADAPTION | ECHO_CAN_USE_NLP | ECHO_CAN_USE_CNG);
awgn_init_dbm0(&far_noise_source, 7162534, -45.0f);
for (i = 0; i < SAMPLE_RATE*30; i++)
{
tx = 0;
rx = awgn(&far_noise_source);
channel_model(&tx, &rx, tx, rx);
clean = echo_can_update(ctx, tx, rx);
put_residue(clean);
}
awgn_init_dbm0(&local_noise_source, 1234567, -10.0f);
for (i = 0; i < SAMPLE_RATE*2; i++)
{
tx = awgn(&local_noise_source);
rx = awgn(&far_noise_source);
channel_model(&tx, &rx, tx, rx);
clean = echo_can_update(ctx, tx, rx);
put_residue(clean);
}
/* Test 9 part 2 - adjust down */
awgn_init_dbm0(&far_noise_source, 7162534, -55.0f);
for (i = 0; i < SAMPLE_RATE*10; i++)
{
tx = 0;
rx = awgn(&far_noise_source);
channel_model(&tx, &rx, tx, rx);
clean = echo_can_update(ctx, tx, rx);
put_residue(clean);
}
for (i = 0; i < SAMPLE_RATE*2; i++)
{
tx = awgn(&local_noise_source);
rx = awgn(&far_noise_source);
channel_model(&tx, &rx, tx, rx);
clean = echo_can_update(ctx, tx, rx);
put_residue(clean);
}
#if defined(ENABLE_GUI)
if (use_gui)
echo_can_monitor_can_update(ctx->fir_taps16[ctx->tap_set], TEST_EC_TAPS);
#endif
}
/* Test 10 - FAX test during call establishment phase */
if ((test_list & PERFORM_TEST_10A))
{
printf("Performing test 10A - Canceller operation on the calling station side\n");
/* Test 10A - Canceller operation on the calling station side */
fprintf(stderr, "Test 10A not yet implemented\n");
}
if ((test_list & PERFORM_TEST_10B))
{
printf("Performing test 10B - Canceller operation on the called station side\n");
/* Test 10B - Canceller operation on the called station side */
fprintf(stderr, "Test 10B not yet implemented\n");
}
if ((test_list & PERFORM_TEST_10C))
{
printf("Performing test 10C - Canceller operation on the calling station side during page\n"
"transmission and page breaks (for further study)\n");
/* Test 10C - Canceller operation on the calling station side during page
transmission and page breaks (for further study) */
fprintf(stderr, "Test 10C not yet implemented\n");
}
if ((test_list & PERFORM_TEST_11))
{
printf("Performing test 11 - Tandem echo canceller test (for further study)\n");
/* Test 11 - Tandem echo canceller test (for further study) */
fprintf(stderr, "Test 11 not yet implemented\n");
}
if ((test_list & PERFORM_TEST_12))
{
printf("Performing test 12 - Residual acoustic echo test (for further study)\n");
/* Test 12 - Residual acoustic echo test (for further study) */
fprintf(stderr, "Test 12 not yet implemented\n");
}
if ((test_list & PERFORM_TEST_13))
{
printf("Performing test 13 - Performance with ITU-T low-bit rate coders in echo path (Optional, under study)\n");
/* Test 13 - Performance with ITU-T low-bit rate coders in echo path
(Optional, under study) */
fprintf(stderr, "Test 13 not yet implemented\n");
}
if ((test_list & PERFORM_TEST_14))
{
printf("Performing test 14 - Performance with V-series low-speed data modems\n");
/* Test 14 - Performance with V-series low-speed data modems */
fprintf(stderr, "Test 14 not yet implemented\n");
}
if ((test_list & PERFORM_TEST_15))
{
printf("Performing test 15 - PCM offset test (Optional)\n");
/* Test 15 - PCM offset test (Optional) */
fprintf(stderr, "Test 15 not yet implemented\n");
}
echo_can_free(ctx);
signal_free(&local_css);
signal_free(&far_css);
if (afCloseFile(resulthandle) != 0)
{
fprintf(stderr, " Cannot close speech file '%s'\n", "result_sound.wav");
exit(2);
}
if (afCloseFile(residuehandle) != 0)
{
fprintf(stderr, " Cannot close speech file '%s'\n", "residue_sound.wav");
exit(2);
}
afFreeFileSetup(filesetup);
afFreeFileSetup(filesetup2);
#if defined(XYZZY)
for (j = 0; j < ctx->taps; j++)
{
for (i = 0; i < coeff_index; i++)
fprintf(stderr, "%d ", coeffs[i][j]);
fprintf(stderr, "\n");
}
#endif
printf("Run time %lds\n", time(NULL) - now);
#if defined(ENABLE_GUI)
if (use_gui)
echo_can_monitor_wait_to_end();
#endif
if (power_meter_1)
level_measurement_device_release(power_meter_1);
if (power_meter_2)
level_measurement_device_release(power_meter_2);
printf("Tests passed.\n");
return 0;
}
/*------------------------------------------------------------------
* tty_gen()
*-------------------------------------------------------------------*/
Word16 tty_gen(
Word16 outbuf[], /* (o): output buffer */
Word16 length, /* (i): length of buffer */
Word16 subframe, /* (i): subframe counter */
Word16 num_subfr, /* (i): number of subframes/frame */
Word16 counter_hist[], /* (i/o): tty counter history */
Word16 char_hist[], /* (i/o): tty character history */
Word16 tty_rate_hist[] /* (i/o): tty baud rate history */
)
{
Word16 i;
Word16 num;
Word16 bit;
Word16 *p_buf;
Word16 write_flag;
bit = 0; /* eliminates compiler warning */
/* Change onset to silence */
if( sub(counter_hist[CURRENT_FRAME],TTY_ONSET) == 0 )
{
counter_hist[CURRENT_FRAME] = TTY_SILENCE;
char_hist[CURRENT_FRAME] = TTY_SILENCE_CHAR;
}
/* If transition from silence to anything else */
if( (current_counter & (TTY_SILENCE|NON_TTY)) != 0
&& sub(counter_hist[CURRENT_FRAME],TTY_SILENCE) != 0
)
{
init_tty_gen( counter_hist[CURRENT_FRAME],
char_hist[CURRENT_FRAME],
tty_rate_hist[CURRENT_FRAME]);
}
/* else if transition from NON_TTY to TTY_SILENCE */
else if( sub(current_counter,NON_TTY) == 0
&& sub(counter_hist[CURRENT_FRAME],TTY_SILENCE) == 0
)
{
init_tty_gen( TTY_SILENCE, TTY_SILENCE_CHAR, 0);
}
/* else if a new character is coming before the old one is finished */
else if( subframe == 0
&& sub(current_counter,counter_hist[CURRENT_FRAME]) != 0
&& (counter_hist[CURRENT_FRAME] & COUNTER_BETWEEN_START_STOP) != 0
)
{
#if TTY_HALF_DUPLEX_FIX
if( sub(bit_num,MARK_HOLD_BIT_NUM) >= 0 )
#else
if( sub(bit_num,MARK_HOLD_BIT_NUM) == 0 )
#endif
{
/* Cut short the mark hold tone to start new character */
init_tty_gen( counter_hist[CURRENT_FRAME],
char_hist[CURRENT_FRAME],
tty_rate_hist[CURRENT_FRAME]);
}
else if( sub(bit_num,STOP_BIT_NUM) == 0
&& sub(bit_size,FRAMESIZE) >= 0
)
{
/* Shorten the stop bit to 1 bit length if it will be done this frame */
#if TTY_GEN_50_BAUD_FIX
#if TTY_NOMINAL_BIT_LEN_FIX
data_bit_len[TTY_45_BAUD] = DATA_BIT_LEN_45_BAUD-3;
data_bit_len[TTY_50_BAUD] = DATA_BIT_LEN_50_BAUD-3;
#else
data_bit_len[TTY_45_BAUD] = DATA_BIT_LEN_45_BAUD-4;
data_bit_len[TTY_50_BAUD] = DATA_BIT_LEN_50_BAUD-4;
#endif /* TTY_NOMINAL_BIT_LEN_FIX */
#endif /* TTY_GEN_50_BAUD_FIX */
bit_size = add(bit_size,data_bit_len[tty_rate_hist[CURRENT_FRAME]]);
bit_size = sub(bit_size,stop_bit_len[tty_rate_hist[CURRENT_FRAME]]);
}
else if( sub(bit_num,STOP_BIT_NUM) < 0 )
{
/*
* Shorten to 1 stop bit if next character comes before
* generating stop bit of current character.
*/
#if TTY_GEN_50_BAUD_FIX
#if TTY_NOMINAL_BIT_LEN_FIX
data_bit_len[TTY_45_BAUD] = DATA_BIT_LEN_45_BAUD-3;
data_bit_len[TTY_50_BAUD] = DATA_BIT_LEN_50_BAUD-3;
#else
data_bit_len[TTY_45_BAUD] = DATA_BIT_LEN_45_BAUD-4;
data_bit_len[TTY_50_BAUD] = DATA_BIT_LEN_50_BAUD-4;
#endif /* TTY_NOMINAL_BIT_LEN_FIX */
#endif /* TTY_GEN_50_BAUD_FIX */
stop_bit_len[tty_rate_hist[CURRENT_FRAME]] = data_bit_len[tty_rate_hist[CURRENT_FRAME]];
}
} /* end if( falling behind) */
p_buf = outbuf;
num = length;
if( sub(bit_size,length) < 0 )
{
num = bit_size;
}
#if TTY_HALF_DUPLEX_FIX
write_flag = 1;
#else
write_flag = 0;
#endif
while( num > 0 )
{
/*-----------------------------------------------------------------------*/
/*-----------------------------------------------------------------------*/
/* If current character non_tty, get out of loop */
if( sub(current_counter,NON_TTY) == 0 )
{
init_tty_gen(NON_TTY,0,0);
#if TTY_HALF_DUPLEX_FIX
write_flag = 0;
#endif
break;
}
/* else if silence, generate silence */
else if( sub(current_counter,TTY_SILENCE) == 0 )
{
for( i=0 ; i < num ; i++ )
{
p_buf[i] = 0;
}
init_tty_gen(TTY_SILENCE,TTY_SILENCE_CHAR,0); /* init in preparation for next char */
#if !TTY_HALF_DUPLEX_FIX
write_flag = 1;
#endif
}
else
{
#if TTY_HALF_DUPLEX_FIX
if( bit_num == SILENCE_HANGOVER_BIT_NUM )
{
for( i=0 ; i < num ; i++ )
{
p_buf[i] = 0;
}
}
else
{
bit = current_char & shl(1,bit_num);
if( bit == 0 )
{
bit = SPACE_FREQ;
}
else
{
bit = MARK_FREQ;
}
#if TTY_CONT_PHASE_FIX
tty_continuous_phase_tone_gen(p_buf,bit,num);
#else
if( sub(bit,prev_bit) != 0 )
{
init_tone_gen(tone_param,bit);
}
tone_gen(p_buf,bit,BAUDOT_GAIN,num,tone_param);
#endif /* TTY_CONT_PHASE_FIX */
}
write_flag = 2;
#else /* !TTY_HALF_DUPLEX_FIX */
bit = current_char & shl(1,bit_num);
if( bit == 0 )
{
bit = SPACE_FREQ;
}
else
{
bit = MARK_FREQ;
}
#if TTY_CONT_PHASE_FIX
tty_continuous_phase_tone_gen(p_buf,bit,num);
#else /* TTY_CONT_PHASE_FIX */
if( sub(bit,prev_bit) != 0 )
{
init_tone_gen(tone_param,bit);
}
tone_gen(p_buf,bit,BAUDOT_GAIN,num,tone_param);
#endif /* TTY_CONT_PHASE_FIX */
write_flag = 1;
#endif /* HALF_DUPLEX_FIX */
/* Update for next iteration */
p_buf += num;
bit_size = sub(bit_size,num);
if( sub(bit_size,1) < 0 ) /* if end of bit */
{
bit_num = add(bit_num,1);
/*
* If a new character immediately follows the
* current character, eliminate the mark hold tone.
*/
#if TTY_HALF_DUPLEX_FIX
if( sub(bit_num,MARK_HOLD_BIT_NUM) >= 0 )
#else
if( sub(bit_num,MARK_HOLD_BIT_NUM) == 0 )
#endif
{
/* Reset stop bit to 1.5 bits */
stop_bit_len[TTY_45_BAUD] = STOP_BIT_LEN_45_BAUD;
stop_bit_len[TTY_50_BAUD] = STOP_BIT_LEN_50_BAUD;
if( sub(current_counter,counter_hist[CURRENT_FRAME]) != 0
&& (counter_hist[CURRENT_FRAME] & COUNTER_BETWEEN_START_STOP) != 0
)
{
#if TTY_HALF_DUPLEX_FIX
bit_num = SILENCE_HANGOVER_BIT_NUM+1;
#else
bit_num = add(bit_num,1);
#endif
}
#if TTY_HALF_DUPLEX_FIX
else
{
/* Remove current_counter from history */
for( i=CURRENT_FRAME-1 ; i >= 0 ; i-- )
{
if( current_counter == counter_hist[i] )
{
/* Replace with TTY_FER so that a vote will be taken */
counter_hist[i] = TTY_FER;
char_hist[i] = 0;
}
else
{
break;
}
}
}
#endif
}
#if TTY_HALF_DUPLEX_FIX
if( sub(bit_num,SILENCE_HANGOVER_BIT_NUM) > 0 ) /* if end of character */
#else
if( sub(bit_num,MARK_HOLD_BIT_NUM) > 0 ) /* if end of character */
#endif
{
/* if start of silence */
if( sub(current_counter,counter_hist[CURRENT_FRAME]) == 0
|| sub(counter_hist[CURRENT_FRAME],NON_TTY) == 0 )
{
counter_hist[CURRENT_FRAME] = TTY_SILENCE;
char_hist[CURRENT_FRAME] = TTY_SILENCE_CHAR;
init_tty_gen(TTY_SILENCE,TTY_SILENCE_CHAR,0);
}
/* else... next character begins right away. */
else /* else start next character */
{
init_tty_gen( counter_hist[CURRENT_FRAME],
char_hist[CURRENT_FRAME],
tty_rate_hist[CURRENT_FRAME]);
}
}
else /* start of next bit */
{
if( sub(bit_num,STOP_BIT_NUM) == 0 )
{
bit_size = stop_bit_len[tty_rate_hist[CURRENT_FRAME+1]];
}
else if( sub(bit_num,MARK_HOLD_BIT_NUM) == 0 )
{
bit_size = MARK_HOLD_LEN;
}
#if TTY_HALF_DUPLEX_FIX
else if( sub(bit_num,SILENCE_HANGOVER_BIT_NUM) == 0 )
{
bit_size = SILENCE_HANGOVER_LEN;
}
#endif
else
{
bit_size = data_bit_len[tty_rate_hist[CURRENT_FRAME+1]];
}
}
}
} /* end if */
/* Update for next iteration */
#if !TTY_CONT_PHASE_FIX
prev_bit = bit;
#endif
length = sub(length,num);
num = length;
if( sub(bit_size,length) < 0 )
{
num = bit_size;
}
} /* end while */
/* Update history buffers for next iteration at the end of the frame */
if( sub(subframe,sub(num_subfr,1)) == 0 )
{
/* Put last generated character in history buffers */
if( sub(counter_hist[CURRENT_FRAME],current_counter) != 0 )
{
tty_rate_hist[CURRENT_FRAME] = tty_rate_hist[CURRENT_FRAME+1];
}
counter_hist[CURRENT_FRAME] = current_counter;
char_hist[CURRENT_FRAME] = shr(current_char,1) & DATA_BIT_MASK;
for( i=TTY_BUF_SIZE-1 ; i > 0 ; i-- )
{
counter_hist[i] = counter_hist[i-1];
char_hist[i] = char_hist[i-1];
tty_rate_hist[i] = tty_rate_hist[i-1];
}
/* During the mark hold, allow the next character to be generated */
#if TTY_HALF_DUPLEX_FIX
if( sub(bit_num,MARK_HOLD_BIT_NUM) >= 0 )
#else
if( sub(bit_num,MARK_HOLD_BIT_NUM) == 0 )
#endif
{
#if TTY_GEN_50_BAUD_FIX
stop_bit_len[TTY_45_BAUD] = STOP_BIT_LEN_45_BAUD;
data_bit_len[TTY_45_BAUD] = DATA_BIT_LEN_45_BAUD;
stop_bit_len[TTY_50_BAUD] = STOP_BIT_LEN_50_BAUD;
data_bit_len[TTY_50_BAUD] = DATA_BIT_LEN_50_BAUD;
#endif
for( i=CURRENT_FRAME ; i >= 0 ; i-- )
{
/* Remove current_counter from history */
if( current_counter == counter_hist[i] )
{
counter_hist[i] = TTY_FER;
char_hist[i] = 0;
}
else
{
break;
}
}
}
}
return(write_flag);
} /* end tty_gen() */
