Module: libav
Branch: release/0.8
Commit: 0f3381ad5bff4c21ba8631fcb54e7e26b6a96803
Author: Luca Barbato <lu_z...@gentoo.org>
Committer: Reinhard Tartler <siret...@tauware.de>
Date: Fri Sep 28 14:38:13 2012 +0200
mpegaudiodec: fix short_start calculation
The value should be always 3, as it follows from the specification.
Fix a stack buffer overflow in exponents_from_scale_factors as reported
by asan. Thanks to Dale Curtis for the sample vector.
(cherry picked from commit 97cfa55eea39cef30abe14682c56c1e4e7f6f10d)
Signed-off-by: Reinhard Tartler <siret...@tauware.de>
---
libavcodec/mpegaudiodec.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/libavcodec/mpegaudiodec.c b/libavcodec/mpegaudiodec.c
index d902573..bb1baef 100644
--- a/libavcodec/mpegaudiodec.c
+++ b/libavcodec/mpegaudiodec.c
@@ -208,7 +208,7 @@ static void ff_compute_band_indexes(MPADecodeContext *s,
GranuleDef *g)
else
g->long_end = 4; /* 8000 Hz */
- g->short_start = 2 + (s->sample_rate_index != 8);
+ g->short_start = 3;
} else {
g->long_end = 0;
g->short_start = 0;
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