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| author | Mans Rullgard <mans@mansr.com> | 2011-11-26 16:50:51 +0000 |
|---|---|---|
| committer | Mans Rullgard <mans@mansr.com> | 2011-11-26 18:50:27 +0000 |
| commit | f7f892e4d5bded48b08e7b776a5fb7c350496f2b (patch) | |
| tree | 218c98b5a39d1cf4acdb239ef62a73a06776d5e2 | |
| parent | e4faa31a0a68dbff320b419a3a73d6b028d770d5 (diff) | |
| download | ffmpeg-f7f892e4d5bded48b08e7b776a5fb7c350496f2b.tar.gz | |
svq1enc: fix signed multiplication overflow
This multiplication can overflow the signed range but not the
unsigned. After right-shifting it will thus fit in the signed
range again.
Signed-off-by: Mans Rullgard <mans@mansr.com>
| -rw-r--r-- | libavcodec/svq1enc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/svq1enc.c b/libavcodec/svq1enc.c index 79aaa6cb26..01d8b315b8 100644 --- a/libavcodec/svq1enc.c +++ b/libavcodec/svq1enc.c @@ -160,7 +160,7 @@ static int encode_block(SVQ1Context *s, uint8_t *src, uint8_t *ref, uint8_t *dec } best_count=0; - best_score -= ((block_sum[0]*block_sum[0])>>(level+3)); + best_score -= (int)(((unsigned)block_sum[0]*block_sum[0])>>(level+3)); best_mean= (block_sum[0] + (size>>1)) >> (level+3); if(level<4){ |