1 files changed, 8 insertions, 0 deletions
diff --git a/libavcodec/ac3.h b/libavcodec/ac3.h
index f01da07213..fa290d35e9 100644
--- a/libavcodec/ac3.h
+++ b/libavcodec/ac3.h
@@ -104,6 +104,14 @@ typedef enum AC3DolbyHeadphoneMode {
     AC3_DHEADPHONMOD_RESERVED
 } AC3DolbyHeadphoneMode;
 
+/** Preferred Stereo Downmix mode */
+typedef enum AC3PreferredStereoDownmixMode {
+    AC3_DMIXMOD_NOTINDICATED = 0,
+    AC3_DMIXMOD_LTRT,
+    AC3_DMIXMOD_LORO,
+    AC3_DMIXMOD_RESERVED
+} AC3PreferredStereoDownmixMode;
+
 typedef struct AC3BitAllocParameters {
     int sr_code;
     int sr_shift;