[FFmpeg-cvslog] avcodec/wmadec: Fix undefined shift in wma_decode_block()
Michael Niedermayer
git at videolan.org
Sat Mar 14 17:33:09 CET 2015
ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Sat Mar 14 17:11:59 2015 +0100| [a48b24e5ebdb21d25512ac481a1d396e7685f0a4] | committer: Michael Niedermayer
avcodec/wmadec: Fix undefined shift in wma_decode_block()
Found-by: Clang -fsanitize=shift
Reported-by: Thierry Foucu <tfoucu at google.com>
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=a48b24e5ebdb21d25512ac481a1d396e7685f0a4
---
libavcodec/wmadec.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/wmadec.c b/libavcodec/wmadec.c
index d80bd2b..ffbf511 100644
--- a/libavcodec/wmadec.c
+++ b/libavcodec/wmadec.c
@@ -697,7 +697,7 @@ static int wma_decode_block(WMACodecContext *s)
/* very high freqs : noise */
n = s->block_len - s->coefs_end[bsize];
- mult1 = mult * exponents[((-1 << bsize)) >> esize];
+ mult1 = mult * exponents[(-(1 << bsize)) >> esize];
for (i = 0; i < n; i++) {
*coefs++ = s->noise_table[s->noise_index] * mult1;
s->noise_index = (s->noise_index + 1) & (NOISE_TAB_SIZE - 1);
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