TT#14008 fix possible unintentional integer overflow

Change-Id: I9dacb34cf92d461029bfb393a251736676431fc7
Warned-by: coverity

daemon/codec.c

@@ -2774,7 +2774,7 @@ static bool __dtx_drift_shift(struct dtx_buffer *dtxb, struct dtx_packet *dtxp,
 		struct dtx_packet *dtxp_last = g_queue_peek_tail(&dtxb->packets);
 		ts_diff = dtxp_last->packet->ts - ts;
 		long long ts_diff_us = (long long) ts_diff * 1000000 / dtxb->clockrate;
-		if (ts_diff_us >= rtpe_config.dtx_lag * 1000) {
+		if (ts_diff_us >= (long long) rtpe_config.dtx_lag * 1000) {
 			// overflow
 			ilogs(dtx, LOG_DEBUG, "DTX timer queue overflowing (%i packets in queue, "
 					"%lli ms delay), speeding up DTX timer by %i ms",
@@ -2810,7 +2810,7 @@ static bool __dtx_drift_drop(struct dtx_buffer *dtxb, struct dtx_packet *dtxp, u
 		struct dtx_packet *dtxp_last = g_queue_peek_tail(&dtxb->packets);
 		ts_diff = dtxp_last->packet->ts - ts;
 		long long ts_diff_us = (long long) ts_diff * 1000000 / dtxb->clockrate;
-		if (ts_diff_us >= rtpe_config.dtx_lag * 1000) {
+		if (ts_diff_us >= (long long) rtpe_config.dtx_lag * 1000) {
 			// overflow
 			ilogs(dtx, LOG_DEBUG, "DTX timer queue overflowing (%i packets in queue, "
 					"%lli ms delay), discarding packet",

daemon/dtmf.c

@@ -210,7 +210,7 @@ static void dtmf_check_trigger(struct call_media *media, char event, uint64_t ts
 	struct dtmf_event *last_ev = g_queue_peek_tail(&media->dtmf_recv);
 	if (last_ev) {
 		uint32_t ts_diff = ts - last_ev->ts;
-		uint64_t ts_diff_ms = ts_diff * 1000 / clockrate;
+		uint64_t ts_diff_ms = (uint64_t) ts_diff * 1000 / clockrate;
 		if (ts_diff_ms > rtpe_config.dtmf_digit_delay) {
 			// delay too long: restart event trigger
 			ml->dtmf_trigger_match = 0;