From 205d3b1d047ec3ede89e0cd981b940ae12044a59 Mon Sep 17 00:00:00 2001
From: Peter Johnson <johnson.peter@gmail.com>
Date: Fri, 23 Dec 2016 22:21:11 -0800
Subject: [PATCH] Some cameras don't provide the JFIF header, so don't require
 it.

This fixes DHT not being inserted on some images.
---
 src/JpegUtil.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/JpegUtil.cpp b/src/JpegUtil.cpp
index 3f754913fc..0e618e9bfb 100644
--- a/src/JpegUtil.cpp
+++ b/src/JpegUtil.cpp
@@ -58,9 +58,10 @@ bool IsJpeg(llvm::StringRef data) {
     return false;
 
   // Check for valid JPEG header (null terminated JFIF)
-  if (bytes[2] != 0xff || bytes[3] != 0xe0 || data.substr(6, 4) != "JFIF" ||
-      bytes[10] != 0x00)
+  if (bytes[2] == 0xff && bytes[3] == 0xe0) {
+    if (data.substr(6, 4) != "JFIF" || bytes[10] != 0x00)
     return false;
+  }
 
   return true;
 }