diff --git a/libavcodec/xxan.c b/libavcodec/xxan.c
index dd5447940b..4561714124 100644
--- a/libavcodec/xxan.c
+++ b/libavcodec/xxan.c
@@ -62,42 +62,42 @@ static av_cold int xan_decode_init(AVCodecContext *avctx)
 static int xan_unpack_luma(XanContext *s,
                            uint8_t *dst, const int dst_size)
 {
-   int tree_size, eof;
-   int bits, mask;
-   int tree_root, node;
-   const uint8_t *dst_end = dst + dst_size;
-   GetByteContext tree = s->gb;
-   int start_off = bytestream2_tell(&tree);
+    int tree_size, eof;
+    int bits, mask;
+    int tree_root, node;
+    const uint8_t *dst_end = dst + dst_size;
+    GetByteContext tree = s->gb;
+    int start_off = bytestream2_tell(&tree);
 
-   tree_size = bytestream2_get_byte(&s->gb);
-   eof       = bytestream2_get_byte(&s->gb);
-   tree_root = eof + tree_size;
-   bytestream2_skip(&s->gb, tree_size * 2);
+    tree_size = bytestream2_get_byte(&s->gb);
+    eof       = bytestream2_get_byte(&s->gb);
+    tree_root = eof + tree_size;
+    bytestream2_skip(&s->gb, tree_size * 2);
 
-   node = tree_root;
-   bits = bytestream2_get_byte(&s->gb);
-   mask = 0x80;
-   for (;;) {
-       int bit = !!(bits & mask);
-       mask >>= 1;
-       bytestream2_seek(&tree, start_off + node*2 + bit - eof * 2, SEEK_SET);
-       node = bytestream2_get_byte(&tree);
-       if (node == eof)
-           break;
-       if (node < eof) {
-           *dst++ = node;
-           if (dst > dst_end)
-               break;
-           node = tree_root;
-       }
-       if (!mask) {
-           if (bytestream2_get_bytes_left(&s->gb) <= 0)
-               break;
-           bits = bytestream2_get_byteu(&s->gb);
-           mask = 0x80;
-       }
-   }
-   return dst != dst_end ? AVERROR_INVALIDDATA : 0;
+    node = tree_root;
+    bits = bytestream2_get_byte(&s->gb);
+    mask = 0x80;
+    for (;;) {
+        int bit = !!(bits & mask);
+        mask >>= 1;
+        bytestream2_seek(&tree, start_off + node*2 + bit - eof * 2, SEEK_SET);
+        node = bytestream2_get_byte(&tree);
+        if (node == eof)
+            break;
+        if (node < eof) {
+            *dst++ = node;
+            if (dst > dst_end)
+                break;
+            node = tree_root;
+        }
+        if (!mask) {
+            if (bytestream2_get_bytes_left(&s->gb) <= 0)
+                break;
+            bits = bytestream2_get_byteu(&s->gb);
+            mask = 0x80;
+        }
+    }
+    return dst != dst_end ? AVERROR_INVALIDDATA : 0;
 }
 
 /* almost the same as in xan_wc3 decoder */