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

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Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit feb3f39614)

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer
2015-11-27 21:02:13 +01:00
parent 20a96b9d8c
commit 40d5f570d8
1 changed files with 3 additions and 0 deletions
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3
libavcodec/jpeg2000dwt.c
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@ -540,6 +540,9 @@ int ff_jpeg2000_dwt_init(DWTContext *s, uint16_t border[2][2],
int ff_dwt_encode(DWTContext *s, void *t) int ff_dwt_encode(DWTContext *s, void *t)
{ {
if (s->ndeclevels == 0)
return 0;
switch(s->type){ switch(s->type){
case FF_DWT97: case FF_DWT97:
dwt_encode97_float(s, t); break; dwt_encode97_float(s, t); break;