1 files changed, 6 insertions, 1 deletions
diff --git a/pjmedia/include/pjmedia/echo.h b/pjmedia/include/pjmedia/echo.h
index ba7f8897..4ed62ee9 100644
--- a/pjmedia/include/pjmedia/echo.h
+++ b/pjmedia/include/pjmedia/echo.h
@@ -95,8 +95,13 @@ typedef enum pjmedia_echo_flag
      * created for the echo canceller will use simple FIFO mechanism, i.e.
      * without using WSOLA to expand and shrink audio samples.
      */
-    PJMEDIA_ECHO_USE_SIMPLE_FIFO = 32
+    PJMEDIA_ECHO_USE_SIMPLE_FIFO = 32,
 
+    /**
+     * If PJMEDIA_ECHO_USE_SW_ECHO flag is specified, software echo canceller
+     * will be used instead of device EC.
+     */
+    PJMEDIA_ECHO_USE_SW_ECHO = 64
 
 } pjmedia_echo_flag;