kenmirrors
/
freeswitch
mirror of https://github.com/signalwire/freeswitch.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

Use a triangle wave in mod_bert

This commit is contained in:
Moises Silva 2013-08-06 12:29:26 -04:00
parent 66a9e12aa8
commit a60876b165
1 changed files with 27 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
src/mod/applications/mod_bert/mod_bert.c
View File

@ -34,6 +34,19 @@ SWITCH_MODULE_LOAD_FUNCTION(mod_bert_load);
SWITCH_MODULE_SHUTDOWN_FUNCTION(mod_bert_shutdown);
SWITCH_MODULE_DEFINITION(mod_bert, mod_bert_load, mod_bert_shutdown, NULL);
static int16_t bert_next_sample(int16_t sample, uint8_t *going_up)
{
if (sample == INT16_MAX || !(*going_up)) {
*going_up = 0;
return --sample;
}
if (sample == INT16_MIN || *going_up) {
*going_up = 1;
return ++sample;
}
switch_assert(0);
}
#define BERT_DEFAULT_WINDOW_MS 1000
#define BERT_DEFAULT_MAX_ERR 10.0
#define BERT_DEFAULT_TIMEOUT_MS 10000
@ -55,11 +68,14 @@ SWITCH_STANDARD_APP(bert_test_function)
uint32_t window_samples;
int16_t sequence_sample;
int16_t predicted_sample;
int16_t previous_sample;
float max_err;
float max_err_hit;
float max_err_ever;
uint8_t in_sync;
uint8_t hangup_on_error;
uint8_t sequence_going_up;
uint8_t prediction_going_up;
switch_time_t timeout;
} bert;
@ -73,6 +89,7 @@ SWITCH_STANDARD_APP(bert_test_function)
bert.window_ms = BERT_DEFAULT_WINDOW_MS;
bert.window_samples = switch_samples_per_packet(read_impl.samples_per_second, bert.window_ms);
bert.max_err = BERT_DEFAULT_MAX_ERR;
bert.sequence_going_up = 1;
timeout_ms = BERT_DEFAULT_TIMEOUT_MS;
/* check if there are user-defined overrides */
@ -137,7 +154,7 @@ SWITCH_STANDARD_APP(bert_test_function)
} else if (!bert.in_sync) {
bert.in_sync = 1;
synced = 1;
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_INFO, "BERT Sync\n");
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_INFO, "BERT Sync Success\n");
bert.timeout = 0;
}
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG10, "Err=%f%% (%u/%u)\n", err, bert.err_samples, bert.processed_samples);
@ -162,8 +179,15 @@ SWITCH_STANDARD_APP(bert_test_function)
if (bert.predicted_sample != read_samples[i]) {
bert.err_samples++;
}
bert.predicted_sample = (read_samples[i] + 1);
write_samples[i] = bert.sequence_sample++;
if (bert.previous_sample > read_samples[i]) {
bert.prediction_going_up = 0;
} else {
bert.prediction_going_up = 1;
}
bert.predicted_sample = bert_next_sample(read_samples[i], &bert.prediction_going_up);
bert.sequence_sample = bert_next_sample(bert.sequence_sample, &bert.sequence_going_up);
write_samples[i] = bert.sequence_sample;
bert.previous_sample = read_samples[i];
bert.processed_samples++;
}