X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fdnxhddata.c;h=7d935a3f317ec897b37680ec8c409de12480d6a4;hb=ebf648d490448d511b5fe970d76040169e65ef74;hp=82fbfdfa70431a790acab4e6acdee4b113b509a4;hpb=de3a33784cb79c35fadb6fc22a0b406450bdef7c;p=ffmpeg

diff --git a/libavcodec/dnxhddata.c b/libavcodec/dnxhddata.c
index 82fbfdfa704..7d935a3f317 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;