From d1c28c6c780514b12db761db5cde178725b165f0 Mon Sep 17 00:00:00 2001
From: Zane van Iperen <zane@zanevaniperen.com>
Date: Mon, 3 May 2021 21:20:30 +1000
Subject: [PATCH] avcodec/adpcm_psx: ignore unknown flag bits

As per documentation.

Signed-off-by: Zane van Iperen <zane@zanevaniperen.com>
---
 libavcodec/adpcm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/adpcm.c b/libavcodec/adpcm.c
index 09ea062027..94e1fade28 100644
--- a/libavcodec/adpcm.c
+++ b/libavcodec/adpcm.c
@@ -2002,7 +2002,7 @@ static int adpcm_decode_frame(AVCodecContext *avctx, void *data,
                     filter = filter >> 4;
                     if (filter >= FF_ARRAY_ELEMS(xa_adpcm_table))
                         return AVERROR_INVALIDDATA;
-                    flag   = bytestream2_get_byteu(&gb);
+                    flag   = bytestream2_get_byteu(&gb) & 0x7;
 
                     /* Decode 28 samples.  */
                     for (n = 0; n < 28; n++) {