From 7cdef77b50360c4294e50115fe6d0ee46fc9a9d9 Mon Sep 17 00:00:00 2001
From: Christophe Gisquet <christophe.gisquet@gmail.com>
Date: Wed, 13 Aug 2014 01:44:40 +0200
Subject: [PATCH] dpx: warn if encrypted

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
---
 libavcodec/dpx.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/libavcodec/dpx.c b/libavcodec/dpx.c
index 5f05cd81be..d8fb4e077b 100644
--- a/libavcodec/dpx.c
+++ b/libavcodec/dpx.c
@@ -108,6 +108,16 @@ static int decode_frame(AVCodecContext *avctx,
         av_log(avctx, AV_LOG_ERROR, "Invalid data start offset\n");
         return AVERROR_INVALIDDATA;
     }
+
+    // Check encryption
+    buf = avpkt->data + 660;
+    ret = read32(&buf, endian);
+    if (ret != 0xFFFFFFFF) {
+        avpriv_report_missing_feature(avctx, "Encryption");
+        av_log(avctx, AV_LOG_WARNING, "The image is encrypted and may "
+               "not properly decode.\n");
+    }
+
     // Need to end in 0x304 offset from start of file
     buf = avpkt->data + 0x304;
     w = read32(&buf, endian);