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-rw-r--r--libavcodec/jpeg2000dwt.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/libavcodec/jpeg2000dwt.c b/libavcodec/jpeg2000dwt.c
index 2bf25a8c4e..36e443d478 100644
--- a/libavcodec/jpeg2000dwt.c
+++ b/libavcodec/jpeg2000dwt.c
@@ -595,6 +595,9 @@ int ff_dwt_encode(DWTContext *s, void *t)
int ff_dwt_decode(DWTContext *s, void *t)
{
+ if (s->ndeclevels == 0)
+ return 0;
+
switch (s->type) {
case FF_DWT97:
dwt_decode97_float(s, t);