diff options
| author | Michael Niedermayer <michaelni@gmx.at> | 2015-05-17 19:07:17 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2015-06-17 21:50:08 +0200 |
| commit | c8676f9daf9dfb5948235412f58c7581fdc03f46 (patch) | |
| tree | 48c16e0d787639d3b24582815b1ba23c6712dddb | |
| parent | 9cee1c4ac7cd39b2e44479060306510ca925faab (diff) | |
| download | ffmpeg-c8676f9daf9dfb5948235412f58c7581fdc03f46.tar.gz | |
avcodec/golomb: get_ur_golomb_jpegls: Fix reading huge k values
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit c720b9ce9850710e74a103d9626869e397a89faa)
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
| -rw-r--r-- | libavcodec/golomb.h | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/libavcodec/golomb.h b/libavcodec/golomb.h index 1c4e2106ee..e10fdc40fa 100644 --- a/libavcodec/golomb.h +++ b/libavcodec/golomb.h @@ -346,8 +346,16 @@ static inline int get_ur_golomb_jpegls(GetBitContext *gb, int k, int limit, if (i < limit - 1) { if (k) { - buf = SHOW_UBITS(re, gb, k); - LAST_SKIP_BITS(re, gb, k); + if (k > MIN_CACHE_BITS - 1) { + buf = SHOW_UBITS(re, gb, 16) << (k-16); + LAST_SKIP_BITS(re, gb, 16); + UPDATE_CACHE(re, gb); + buf |= SHOW_UBITS(re, gb, k-16); + LAST_SKIP_BITS(re, gb, k-16); + } else { + buf = SHOW_UBITS(re, gb, k); + LAST_SKIP_BITS(re, gb, k); + } } else { buf = 0; } |