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mpegaudiodec: fix short_start calculation
author
Luca Barbato
<lu_zero@gentoo.org>
Fri, 28 Sep 2012 12:38:13 +0000
(14:38 +0200)
committer
Luca Barbato
<lu_zero@gentoo.org>
Fri, 28 Sep 2012 14:02:39 +0000
(16:02 +0200)
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.
libavcodec/mpegaudiodec.c
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diff --git
a/libavcodec/mpegaudiodec.c
b/libavcodec/mpegaudiodec.c
index
03094f6
..
ead0e1d
100644
(file)
--- a/
libavcodec/mpegaudiodec.c
+++ b/
libavcodec/mpegaudiodec.c
@@
-211,7
+211,7
@@
static void ff_compute_band_indexes(MPADecodeContext *s, GranuleDef *g)
else
g->long_end = 6;
- g->short_start =
2 + (s->sample_rate_index != 8)
;
+ g->short_start =
3
;
} else {
g->long_end = 0;
g->short_start = 0;