1 files changed, 8 insertions, 0 deletions
diff --git a/libavcodec/dnxhddata.c b/libavcodec/dnxhddata.c
index 82fbfdf..7d935a3 100644
--- a/libavcodec/dnxhddata.c
+++ b/libavcodec/dnxhddata.c
@@ -22,6 +22,7 @@
 #include "avcodec.h"
 #include "dnxhddata.h"
 #include "libavutil/common.h"
+#include "libavutil/intreadwrite.h"
 
 /* The quantization tables below are in zigzag order! */
 
@@ -1102,6 +1103,13 @@ int avpriv_dnxhd_get_interlaced(int cid)
     return ff_dnxhd_cid_table[i].flags & DNXHD_INTERLACED ? 1 : 0;
 }
 
+uint64_t avpriv_dnxhd_parse_header_prefix(const uint8_t *buf)
+{
+    uint64_t prefix = AV_RB32(buf);
+    prefix = (prefix << 16) | buf[4] << 8;
+    return ff_dnxhd_check_header_prefix(prefix);
+}
+
 int ff_dnxhd_find_cid(AVCodecContext *avctx, int bit_depth)
 {
     int i, j;