From: Reimar Döffinger <Reimar.Doeffinger@gmx.de>
Date: Mon, 14 Sep 2009 21:50:23 +0000 (+0000)
Subject: Make dnxhd probe more strict, fail if we detect values in header that would
X-Git-Tag: v0.6~3344
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=98487a5b69d9641b4ed66a5281752ea5617eeac7;p=platform%2Fupstream%2Flibav.git

Make dnxhd probe more strict, fail if we detect values in header that would
make our decoder fail anyway.
dnxhd probe now passes probetest.

Originally committed as revision 19847 to svn://svn.ffmpeg.org/ffmpeg/trunk
---

diff --git a/libavformat/raw.c b/libavformat/raw.c
index a3227cd..3a53eee 100644
--- a/libavformat/raw.c
+++ b/libavformat/raw.c
@@ -580,10 +580,19 @@ static int dirac_probe(AVProbeData *p)
 static int dnxhd_probe(AVProbeData *p)
 {
     static const uint8_t header[] = {0x00,0x00,0x02,0x80,0x01};
-    if (!memcmp(p->buf, header, 5))
-        return AVPROBE_SCORE_MAX;
-    else
+    int w, h, compression_id;
+    if (p->buf_size < 0x2c)
+        return 0;
+    if (memcmp(p->buf, header, 5))
+        return 0;
+    h = AV_RB16(p->buf + 0x18);
+    w = AV_RB16(p->buf + 0x1a);
+    if (!w || !h)
+        return 0;
+    compression_id = AV_RB32(p->buf + 0x28);
+    if (compression_id < 1237 || compression_id > 1253)
         return 0;
+    return AVPROBE_SCORE_MAX;
 }
 #endif