Support for enabling/disabling HWEC based on call bearer_cap

libs/freetdm/src/ftdm_io.c

@@ -244,6 +244,39 @@ static __inline__ void ftdm_std_free(void *pool, void *ptr)
 	free(ptr);
 }
 
+static void ftdm_set_echocancel_call_begin(ftdm_channel_t *chan)
+{
+	ftdm_caller_data_t *caller_data = ftdm_channel_get_caller_data(chan);
+	if (ftdm_channel_test_feature(chan, FTDM_CHANNEL_FEATURE_HWEC)) {
+		if (ftdm_channel_test_feature(chan, FTDM_CHANNEL_FEATURE_HWEC_DISABLED_ON_IDLE)) {
+			if (caller_data->bearer_capability != FTDM_BEARER_CAP_64K_UNRESTRICTED) {
+				ftdm_channel_command(chan, FTDM_COMMAND_ENABLE_ECHOCANCEL, NULL);
+			}
+		} else {
+			if (caller_data->bearer_capability == FTDM_BEARER_CAP_64K_UNRESTRICTED) {
+				ftdm_channel_command(chan, FTDM_COMMAND_DISABLE_ECHOCANCEL, NULL);
+			}
+		}
+	}
+}
+
+static void ftdm_set_echocancel_call_end(ftdm_channel_t *chan)
+{
+	ftdm_caller_data_t *caller_data = ftdm_channel_get_caller_data(chan);
+	if (ftdm_channel_test_feature(chan, FTDM_CHANNEL_FEATURE_HWEC)) {
+		if (ftdm_channel_test_feature(chan, FTDM_CHANNEL_FEATURE_HWEC_DISABLED_ON_IDLE)) {
+			if (caller_data->bearer_capability != FTDM_BEARER_CAP_64K_UNRESTRICTED) {
+				ftdm_channel_command(chan, FTDM_COMMAND_DISABLE_ECHOCANCEL, NULL);
+			}
+		} else {
+			if (caller_data->bearer_capability == FTDM_BEARER_CAP_64K_UNRESTRICTED) {
+				ftdm_channel_command(chan, FTDM_COMMAND_ENABLE_ECHOCANCEL, NULL);
+			}
+		}
+	}
+}
+
+
 FT_DECLARE_DATA ftdm_memory_handler_t g_ftdm_mem_handler = 
 {
 	/*.pool =*/ NULL,
@@ -2008,6 +2041,9 @@ done:
 static ftdm_status_t call_hangup(ftdm_channel_t *chan, const char *file, const char *func, int line)
 {
 	ftdm_set_flag(chan, FTDM_CHANNEL_USER_HANGUP);
+
+	ftdm_set_echocancel_call_end(chan);
+	
 	if (chan->state != FTDM_CHANNEL_STATE_DOWN) {
 		if (chan->state == FTDM_CHANNEL_STATE_HANGUP) {
 			/* make user's life easier, and just ignore double hangup requests */
@@ -2177,6 +2213,8 @@ FT_DECLARE(ftdm_status_t) _ftdm_channel_call_place(const char *file, const char
 	ftdm_assert_return(ftdmchan != NULL, FTDM_FAIL, "null channel");
 	ftdm_assert_return(ftdm_test_flag(ftdmchan, FTDM_CHANNEL_OUTBOUND), FTDM_FAIL, "Call place, but outbound flag not set\n");
 
+	ftdm_set_echocancel_call_begin(ftdmchan);
+
 	ftdm_channel_lock(ftdmchan);
 
 	if (ftdmchan->span->outgoing_call) {
@@ -4740,11 +4778,15 @@ FT_DECLARE(ftdm_status_t) ftdm_span_send_signal(ftdm_span_t *span, ftdm_sigmsg_t
 		break;
 
 	case FTDM_SIGEVENT_START:
+		{
+			ftdm_set_echocancel_call_begin(sigmsg->channel);
+
 			/* when cleaning up the public API I added this because mod_freetdm.c on_fxs_signal was
 			* doing it during SIGEVENT_START, but now that flags are private they can't, wonder if
 			* is needed at all?
 			* */
 			ftdm_clear_flag(sigmsg->channel, FTDM_CHANNEL_HOLD);
+		}
 		break;
 
 	case FTDM_SIGEVENT_STOP:

libs/freetdm/src/ftmod/ftmod_wanpipe/ftmod_wanpipe.c

@@ -280,6 +280,25 @@ static unsigned wp_open_range(ftdm_span_t *span, unsigned spanno, unsigned start
 					ftdm_channel_set_feature(chan, FTDM_CHANNEL_FEATURE_DTMF_DETECT);
 					dtmf = "hardware";
 				}
+
+				err = sangoma_tdm_get_hw_ec(chan->sockfd, &tdm_api);
+				if (err > 0) {
+					ftdm_channel_set_feature(chan, FTDM_CHANNEL_FEATURE_HWEC);
+				}
+				
+#ifdef WP_API_FEATURE_HWEC_PERSIST
+				err = sangoma_tdm_get_hwec_persist_status(chan->sockfd, &tdm_api);
+				if (err == 0) {
+					ftdm_channel_set_feature(chan, FTDM_CHANNEL_FEATURE_HWEC_DISABLED_ON_IDLE);
+				}
+#else
+				if (span->trunk_type ==  FTDM_TRUNK_BRI || span->trunk_type ==  FTDM_TRUNK_BRI_PTMP) {
+					ftdm_log(FTDM_LOG_WARNING, "WP_API_FEATURE_HWEC_PERSIST feature is not supported \
+							 with your version of libsangoma, you should update your Wanpipe drivers\n");
+
+				}
+#endif
+
 			}
 
 #ifdef LIBSANGOMA_VERSION
@@ -598,6 +617,14 @@ static FIO_COMMAND_FUNCTION(wanpipe_command)
 		break;
 	case FTDM_COMMAND_ENABLE_ECHOCANCEL:
 		{
+#ifdef WP_API_FEATURE_EC_CHAN_STAT
+			err=sangoma_tdm_get_hwec_chan_status(ftdmchan->sockfd, &tdm_api);
+			if (err > 0) {
+				/* Hardware echo canceller already enabled */
+				err = 0;
+				break;
+			}
+#endif
 			err=sangoma_tdm_enable_hwec(ftdmchan->sockfd, &tdm_api);
 			if (err) {
 				snprintf(ftdmchan->last_error, sizeof(ftdmchan->last_error), "HWEC Enable Failed");
@@ -607,6 +634,13 @@ static FIO_COMMAND_FUNCTION(wanpipe_command)
 		break;
 	case FTDM_COMMAND_DISABLE_ECHOCANCEL:
 		{
+#ifdef WP_API_FEATURE_EC_CHAN_STAT
+			err=sangoma_tdm_get_hwec_chan_status(ftdmchan->sockfd, &tdm_api);
+			if (!err) {
+				/* Hardware echo canceller already disabled */	
+				break;
+			}
+#endif		
 			err=sangoma_tdm_disable_hwec(ftdmchan->sockfd, &tdm_api);
 			if (err) {
 				snprintf(ftdmchan->last_error, sizeof(ftdmchan->last_error), "HWEC Disable Failed");

libs/freetdm/src/include/private/ftdm_types.h

@@ -191,6 +191,8 @@ typedef enum {
 	FTDM_CHANNEL_FEATURE_CALLERID = (1 << 4), /*!< Channel can detect caller id (read-only) */
 	FTDM_CHANNEL_FEATURE_PROGRESS = (1 << 5), /*!< Channel can detect inband progress (read-only) */
 	FTDM_CHANNEL_FEATURE_CALLWAITING = (1 << 6), /*!< Channel will allow call waiting (ie: FXS devices) (read/write) */
+	FTDM_CHANNEL_FEATURE_HWEC = (1<<7), /*!< Channel has a hardware echo canceller */
+	FTDM_CHANNEL_FEATURE_HWEC_DISABLED_ON_IDLE  = (1<<8), /*!< hardware echo canceller is disabled when there are no calls on this channel */
 } ftdm_channel_feature_t;
 
 typedef enum {