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-rw-r--r--libavcodec/ac3enc.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/libavcodec/ac3enc.h b/libavcodec/ac3enc.h
index 30c15d0d2f..c7b692d82a 100644
--- a/libavcodec/ac3enc.h
+++ b/libavcodec/ac3enc.h
@@ -86,6 +86,7 @@ typedef int64_t CoefSumType;
#define AC3ENC_OPT_SMALL_ROOM 2
#define AC3ENC_OPT_DOWNMIX_LTRT 1
#define AC3ENC_OPT_DOWNMIX_LORO 2
+#define AC3ENC_OPT_DOWNMIX_DPLII 3 // reserved value in A/52, but used by encoders to indicate DPL2
#define AC3ENC_OPT_ADCONV_STANDARD 0
#define AC3ENC_OPT_ADCONV_HDCD 1