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FS-7406 added deduplicate_dtmf application

This commit is contained in:
Chris Rienzo 2015-04-01 14:07:55 -04:00 committed by Chris Rienzo
parent 3c2afc6a2c
commit c6ef0558ff
1 changed files with 106 additions and 0 deletions
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106
src/mod/applications/mod_dptools/mod_dptools.c
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@ -5669,7 +5669,112 @@ SWITCH_STANDARD_API(page_api_function)
return SWITCH_STATUS_SUCCESS;
}
/**
* Convert DTMF source to human readable string
*/
static const char *to_dtmf_source_string(switch_dtmf_source_t source)
{
switch(source) {
case SWITCH_DTMF_ENDPOINT: return "SIP INFO";
case SWITCH_DTMF_INBAND_AUDIO: return "INBAND";
case SWITCH_DTMF_RTP: return "2833";
case SWITCH_DTMF_UNKNOWN: return "UNKNOWN";
case SWITCH_DTMF_APP: return "APP";
}
return "UNKNOWN";
}
struct deduplicate_dtmf_filter {
int only_rtp;
char last_dtmf;
switch_dtmf_source_t last_dtmf_source;
};
/**
* Filter incoming DTMF and ignore any duplicates
*/
static switch_status_t deduplicate_recv_dtmf_hook(switch_core_session_t *session, const switch_dtmf_t *dtmf, switch_dtmf_direction_t direction)
{
switch_status_t status = SWITCH_STATUS_FALSE;
int only_rtp = 0;
struct deduplicate_dtmf_filter *filter = switch_channel_get_private(switch_core_session_get_channel(session), "deduplicate_dtmf_filter");
if (!filter) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_WARNING, "Accept %s digit %c: deduplicate filter missing!\n", to_dtmf_source_string(dtmf->source), dtmf->digit);
return SWITCH_STATUS_SUCCESS;
}
/* remember current state as it might change */
only_rtp = filter->only_rtp;
/* RTP DTMF is preferred over all others- and if it's demonstrated to be available, inband / info detection is disabled */
if (only_rtp) {
switch (dtmf->source) {
case SWITCH_DTMF_ENDPOINT:
switch_channel_set_variable(switch_core_session_get_channel(session), "deduplicate_dtmf_seen_endpoint", "true");
break;
case SWITCH_DTMF_INBAND_AUDIO:
switch_channel_set_variable(switch_core_session_get_channel(session), "deduplicate_dtmf_seen_inband", "true");
break;
case SWITCH_DTMF_RTP:
switch_channel_set_variable(switch_core_session_get_channel(session), "deduplicate_dtmf_seen_rtp", "true");
/* pass through */
case SWITCH_DTMF_UNKNOWN:
case SWITCH_DTMF_APP:
/* always allow */
status = SWITCH_STATUS_SUCCESS;
break;
}
} else {
/* accept everything except duplicates until RTP digit is detected */
switch (dtmf->source) {
case SWITCH_DTMF_INBAND_AUDIO:
switch_channel_set_variable(switch_core_session_get_channel(session), "deduplicate_dtmf_seen_inband", "true");
break;
case SWITCH_DTMF_RTP:
switch_channel_set_variable(switch_core_session_get_channel(session), "deduplicate_dtmf_seen_rtp", "true");
/* change state to only allow RTP events */
filter->only_rtp = 1;
/* stop inband detector */
switch_ivr_broadcast(switch_core_session_get_uuid(session), "spandsp_stop_dtmf::", SMF_ECHO_ALEG);
break;
case SWITCH_DTMF_ENDPOINT:
switch_channel_set_variable(switch_core_session_get_channel(session), "deduplicate_dtmf_seen_endpoint", "true");
break;
case SWITCH_DTMF_UNKNOWN:
case SWITCH_DTMF_APP:
/* always allow */
status = SWITCH_STATUS_SUCCESS;
break;
}
/* make sure not a duplicate DTMF */
if (filter->last_dtmf_source == dtmf->source || filter->last_dtmf != dtmf->digit) {
status = SWITCH_STATUS_SUCCESS;
}
filter->last_dtmf = dtmf->digit;
filter->last_dtmf_source = dtmf->source;
}
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_INFO, "(%s) %s %s digit %c\n",
(only_rtp) ? "ALLOW 2833" : "ALLOW ALL",
(status == SWITCH_STATUS_SUCCESS) ? "Accept" : "Ignore", to_dtmf_source_string(dtmf->source), dtmf->digit);
return status;
}
SWITCH_STANDARD_APP(deduplicate_dtmf_app_function)
{
struct deduplicate_dtmf_filter *filter = switch_channel_get_private(switch_core_session_get_channel(session), "deduplicate_dtmf_filter");
if (!filter) {
filter = switch_core_session_alloc(session, sizeof(*filter));
filter->only_rtp = !zstr(data) && !strcmp("only_rtp", data);
filter->last_dtmf = 0;
switch_channel_set_private(switch_core_session_get_channel(session), "deduplicate_dtmf_filter", filter);
switch_core_event_hook_add_recv_dtmf(session, deduplicate_recv_dtmf_hook);
}
}
#define SPEAK_DESC "Speak text to a channel via the tts interface"
#define DISPLACE_DESC "Displace audio from a file to the channels input"
@ -5968,6 +6073,7 @@ SWITCH_MODULE_LOAD_FUNCTION(mod_dptools_load)
SWITCH_ADD_APP(app_interface, "limit_hash_execute", "Limit", LIMITHASHEXECUTE_DESC, limit_hash_execute_function, LIMITHASHEXECUTE_USAGE, SAF_SUPPORT_NOMEDIA);
SWITCH_ADD_APP(app_interface, "pickup", "Pickup", "Pickup a call", pickup_function, PICKUP_SYNTAX, SAF_SUPPORT_NOMEDIA);
SWITCH_ADD_APP(app_interface, "deduplicate_dtmf", "Prevent duplicate inband + 2833 dtmf", "", deduplicate_dtmf_app_function, "[only_rtp]", SAF_SUPPORT_NOMEDIA);
SWITCH_ADD_DIALPLAN(dp_interface, "inline", inline_dialplan_hunt);