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Fix floating point exception with cwebp -progress

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Adds a test of enc->mb_h_ to VP8IteratorProgress() to avoid a division
by zero. Fixes issue #121.

Original patch from even rouault (even dot rouault at gmail dot com).

Change-Id: Ie5fcc1821860c0a9366d5aa11f3aded4f5b98ed7
This commit is contained in:
James Zern 2012-06-18 15:43:28 -07:00
parent a89835d33a
commit f2cee06708
1 changed files with 3 additions and 1 deletions
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4
src/enc/iterator.c
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@ -72,7 +72,9 @@ void VP8IteratorInit(VP8Encoder* const enc, VP8EncIterator* const it) {
int VP8IteratorProgress(const VP8EncIterator* const it, int delta) {
VP8Encoder* const enc = it->enc_;
if (delta && enc->pic_->progress_hook) {
const int percent = it->percent0_ + delta * it->y_ / (enc->mb_h_ - 1);
const int percent = (enc->mb_h_ <= 1)
? it->percent0_
: it->percent0_ + delta * it->y_ / (enc->mb_h_ - 1);
return WebPReportProgress(enc->pic_, percent, &enc->percent_);
}
return 1;