[Core] DTMF: Avoid division by zero on low actual_samples_per_second

diff --git a/src/switch_core_io.c b/src/switch_core_io.c
index fd11a3da47522e0fc2d4aae1c8e17f775c3a5188..22d0474e3e205bd3d2684ec19be8ceae4fc10759 100644 (file)
--- a/src/switch_core_io.c
+++ b/src/switch_core_io.c
@@ -1160,7 +1160,10 @@ SWITCH_DECLARE(switch_status_t) switch_core_session_send_dtmf_string(switch_core
        }
 
        switch_core_session_get_write_impl(session, &write_impl);
-       rate_mult = (write_impl.actual_samples_per_second / 1000);
+
+       if (write_impl.actual_samples_per_second >= 1000) {
+               rate_mult = (write_impl.actual_samples_per_second / 1000);
+       } 
 
        for (i = 0; i < argc; i++) {
                dtmf.duration = switch_core_default_dtmf_duration(0);