aacpsy: avoid psy_band->threshold becoming NaN
authorAndreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
Thu, 16 Apr 2015 18:04:54 +0000 (20:04 +0200)
committerMichael Niedermayer <michaelni@gmx.at>
Fri, 17 Apr 2015 13:20:30 +0000 (15:20 +0200)
commit1d0f9c92c5505ada35a20d6812fb41a47aa0d14a
tree241505db1d6db5bd3bb279770a40799f20b7896c
parentd846d3e88efd4c90e22e8a5f2b2b745e5a6a6166
aacpsy: avoid psy_band->threshold becoming NaN

If band->thr is 0.0f, the division is undefined, making norm_fac not a
number or infinity, which causes psy_band->threshold to become NaN.

This is passed on to other variables until it finally reaches
sce->sf_idx and is converted to an integer (-2147483648).

This causes a segmentation fault when it is used as array index.

Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
Reviewed-by: Claudio Freire <klaussfreire@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit e224aa41917454e7b5c23d9f2541425743ce595a)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
libavcodec/aacpsy.c