[FFmpeg-cvslog] avcodec/dpx: Move need_align to act per line

[Michael Niedermayer]

ffmpeg | branch: release/2.4 | Michael Niedermayer <michael at niedermayer.cc> | Sat Nov 14 14:29:02 2015 +0100| [99e080ec38eec8e8e0ca3b404d86c4526ed57d74] | committer: Michael Niedermayer

avcodec/dpx: Move need_align to act per line

Fixes out of array read
Fixes: 61cf123c081ee2bb774d307c75bdb99e/asan_heap-oob_1224f76_5546_bee833ffae73f752b489b9eeaac52db7.dpx

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit c8aaae8e0f1519bc99bd717ea3067c9cfdb68def)

Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=99e080ec38eec8e8e0ca3b404d86c4526ed57d74
---

 libavcodec/dpx.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavcodec/dpx.c b/libavcodec/dpx.c
index 5d8c4f3..02aa779 100644
--- a/libavcodec/dpx.c
+++ b/libavcodec/dpx.c
@@ -334,11 +334,11 @@ static int decode_frame(AVCodecContext *avctx,
                 // For 12 bit, ignore alpha
                 if (elements == 4)
                     buf += 2;
-                // Jump to next aligned position
-                buf += need_align;
             }
             for (i = 0; i < 3; i++)
                 ptr[i] += p->linesize[i];
+            // Jump to next aligned position
+            buf += need_align;
         }
         break;
     case 16: