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| author | Mans Rullgard <mans@mansr.com> | 2011-10-08 13:41:23 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2011-11-04 00:59:58 +0100 |
| commit | c2c83dcb322504807388f804d73d75a45fab004b (patch) | |
| tree | cc8864aaa42ba5ae202eb676ac615c711f9dde2c /libavcodec | |
| parent | 4c5cdb493c25a0ffb05022e7afa001725e0adc62 (diff) | |
| download | ffmpeg-c2c83dcb322504807388f804d73d75a45fab004b.tar.gz | |
aacdec: fix undefined shifts
Since nnz can be zero, this is needed to avoid a shift by 32.
Signed-off-by: Mans Rullgard <mans@mansr.com>
(cherry picked from commit d12294304acd82cb219e3f66ca9cd6efb2194fa4)
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavcodec')
| -rw-r--r-- | libavcodec/aacdec.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libavcodec/aacdec.c b/libavcodec/aacdec.c index 6cc0cec0f0..e9f2cc53e9 100644 --- a/libavcodec/aacdec.c +++ b/libavcodec/aacdec.c @@ -1090,7 +1090,7 @@ static int decode_spectrum_and_dequant(AACContext *ac, float coef[1024], GET_VLC(code, re, gb, vlc_tab, 8, 2); cb_idx = cb_vector_idx[code]; nnz = cb_idx >> 8 & 15; - bits = SHOW_UBITS(re, gb, nnz) << (32-nnz); + bits = nnz ? GET_CACHE(re, gb) : 0; LAST_SKIP_BITS(re, gb, nnz); cf = VMUL4S(cf, vq, cb_idx, bits, sf + idx); } while (len -= 4); @@ -1130,7 +1130,7 @@ static int decode_spectrum_and_dequant(AACContext *ac, float coef[1024], GET_VLC(code, re, gb, vlc_tab, 8, 2); cb_idx = cb_vector_idx[code]; nnz = cb_idx >> 8 & 15; - sign = SHOW_UBITS(re, gb, nnz) << (cb_idx >> 12); + sign = nnz ? SHOW_UBITS(re, gb, nnz) << (cb_idx >> 12) : 0; LAST_SKIP_BITS(re, gb, nnz); cf = VMUL2S(cf, vq, cb_idx, sign, sf + idx); } while (len -= 2); |