[Freeswitch-svn] [commit] r4111 - in freeswitch/trunk/src: . include

[Freeswitch SVN]

Author: mikej
Date: Fri Feb  2 23:09:43 2007
New Revision: 4111

Modified:
   freeswitch/trunk/src/include/switch_ivr.h
   freeswitch/trunk/src/switch_ivr.c

Log:
Initial structure for generic inband dtmf detection.  NOTE: This code does not currently remove the inband dtmf tones from the stream (as that is not supported using read media bugs) and it is also COMPLETELY untested and unused anywhere.  This code is there for somone who wants to implement this feature in mod_sofia to test.

Modified: freeswitch/trunk/src/include/switch_ivr.h
==============================================================================
--- freeswitch/trunk/src/include/switch_ivr.h	(original)
+++ freeswitch/trunk/src/include/switch_ivr.h	Fri Feb  2 23:09:43 2007
@@ -174,6 +174,9 @@
 */
 SWITCH_DECLARE(switch_status_t) switch_ivr_stop_record_session(switch_core_session_t *session, char *file);
 
+SWITCH_DECLARE(switch_status_t) switch_ivr_inband_dtmf_session(switch_core_session_t *session);
+SWITCH_DECLARE(switch_status_t) switch_ivr_stop_inband_dtmf_session(switch_core_session_t *session);
+
 /*!
   \brief play a file from the disk to the session
   \param session the session to play the file too

Modified: freeswitch/trunk/src/switch_ivr.c
==============================================================================
--- freeswitch/trunk/src/switch_ivr.c	(original)
+++ freeswitch/trunk/src/switch_ivr.c	Fri Feb  2 23:09:43 2007
@@ -27,6 +27,7 @@
  * Paul D. Tinsley <pdt at jackhammer.org>
  * Neal Horman <neal at wanlink dot com>
  * Matt Klein <mklein at nmedia.net>
+ * Michael Jerris <mike at jerris.com>
  *
  * switch_ivr.c -- IVR Library
  *
@@ -675,6 +676,96 @@
 	return SWITCH_STATUS_SUCCESS;
 }
 
+typedef struct {
+	switch_core_session_t *session;
+	teletone_dtmf_detect_state_t dtmf_detect;
+} switch_inband_dtmf_t;
+
+static void inband_dtmf_callback(switch_media_bug_t *bug, void *user_data, switch_abc_type_t type)
+{
+	switch_inband_dtmf_t *pvt = (switch_inband_dtmf_t *) user_data;
+	uint8_t data[SWITCH_RECCOMMENDED_BUFFER_SIZE];
+	switch_frame_t frame = {0};
+	char digit_str[80];
+	switch_channel_t *channel = switch_core_session_get_channel(pvt->session);
+
+	assert(channel != NULL);
+	frame.data = data;
+	frame.buflen = SWITCH_RECCOMMENDED_BUFFER_SIZE;
+
+	switch(type) {
+		case SWITCH_ABC_TYPE_INIT:
+			break;
+		case SWITCH_ABC_TYPE_CLOSE:
+			break;
+		case SWITCH_ABC_TYPE_READ:
+			if (switch_core_media_bug_read(bug, &frame) == SWITCH_STATUS_SUCCESS) {
+				teletone_dtmf_detect(&pvt->dtmf_detect, frame.data, frame.samples);
+				teletone_dtmf_get(&pvt->dtmf_detect, digit_str, sizeof(digit_str));
+				if(digit_str[0]) {
+					switch_channel_queue_dtmf(channel, digit_str);
+					switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "DTMF DETECTED: [%s]\n", digit_str);
+				}
+			}
+			break;
+		case SWITCH_ABC_TYPE_WRITE:
+		default:
+			break;
+	}
+}
+
+SWITCH_DECLARE(switch_status_t) switch_ivr_stop_inband_dtmf_session(switch_core_session_t *session) 
+{
+	switch_media_bug_t *bug;
+	switch_channel_t *channel = switch_core_session_get_channel(session);
+
+	assert(channel != NULL);
+	if ((bug = switch_channel_get_private(channel, "dtmf"))) {
+		switch_channel_set_private(channel, "dtmf", NULL);
+		switch_core_media_bug_remove(session, &bug);
+		return SWITCH_STATUS_SUCCESS;
+	}
+
+	return SWITCH_STATUS_FALSE;
+
+}
+
+SWITCH_DECLARE(switch_status_t) switch_ivr_inband_dtmf_session(switch_core_session_t *session)
+{
+	switch_channel_t *channel;
+	switch_codec_t *read_codec;
+	switch_media_bug_t *bug;
+	switch_status_t status;
+	switch_inband_dtmf_t *pvt;
+
+	channel = switch_core_session_get_channel(session);
+	assert(channel != NULL);
+
+	read_codec = switch_core_session_get_read_codec(session);
+	assert(read_codec != NULL);
+
+	if (!(pvt = switch_core_session_alloc(session, sizeof(*pvt)))) {
+		return SWITCH_STATUS_MEMERR;
+	}
+
+	teletone_dtmf_detect_init(&pvt->dtmf_detect, read_codec->implementation->samples_per_second);
+
+	pvt->session = session;
+
+	switch_channel_answer(channel);	
+
+	if ((status = switch_core_media_bug_add(session,
+		inband_dtmf_callback,
+		pvt,
+		SMBF_READ_STREAM,
+		&bug)) != SWITCH_STATUS_SUCCESS) {
+			return status;
+	}
+
+	switch_channel_set_private(channel, "dtmf", bug);
+
+	return SWITCH_STATUS_SUCCESS;
+}
 
 struct speech_thread_handle {
 	switch_core_session_t *session;