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avcodec/vc2enc: Clear coef_buf on allocation 

Fixes: Use of uninitialized memory
Fixes: assertion failure

Reviewed-by: <atomnuker>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 6d00905f81)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-11-15 16:53:34 +01:00
parent aac7ca7a36
commit 066c657376
1 changed files with 1 additions and 1 deletions
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2
libavcodec/vc2enc.c
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@ -1171,7 +1171,7 @@ static av_cold int vc2_encode_init(AVCodecContext *avctx)
p->dwt_width = w = FFALIGN(p->width, (1 << s->wavelet_depth));
p->dwt_height = h = FFALIGN(p->height, (1 << s->wavelet_depth));
p->coef_stride = FFALIGN(p->dwt_width, 32);
p->coef_buf = av_malloc(p->coef_stride*p->dwt_height*sizeof(dwtcoef));
p->coef_buf = av_mallocz(p->coef_stride*p->dwt_height*sizeof(dwtcoef));
if (!p->coef_buf)
goto alloc_fail;
for (level = s->wavelet_depth-1; level >= 0; level--) {