[FFmpeg-cvslog] avcodec/jpeg2000dwt: Check ndeclevels before calling dwt_encode*()

[Michael Niedermayer]

ffmpeg | branch: release/2.8 | Michael Niedermayer <michael at niedermayer.cc> | Fri Nov 27 21:02:13 2015 +0100| [9ce96a688b180d23f2c6de7d1a90858451af80f8] | committer: Michael Niedermayer

avcodec/jpeg2000dwt: Check ndeclevels before calling dwt_encode*()

Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit feb3f39614b88c113211a98dda1bc2fe5c3c6957)

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

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=9ce96a688b180d23f2c6de7d1a90858451af80f8
---

 libavcodec/jpeg2000dwt.c |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/libavcodec/jpeg2000dwt.c b/libavcodec/jpeg2000dwt.c
index 36e443d..a46c93a 100644
--- a/libavcodec/jpeg2000dwt.c
+++ b/libavcodec/jpeg2000dwt.c
@@ -580,6 +580,9 @@ int ff_jpeg2000_dwt_init(DWTContext *s, int border[2][2],
 
 int ff_dwt_encode(DWTContext *s, void *t)
 {
+    if (s->ndeclevels == 0)
+        return 0;
+
     switch(s->type){
         case FF_DWT97:
             dwt_encode97_float(s, t); break;