avfilter/af_headphone: Don't overrun array

The headphone filter stores the channel position of the ith HRIR stream
in the ith element of an array of 64 elements; but because there is no
check for duplicate channels, it is easy to write beyond the end of the
array by simply repeating channels.

This commit adds a check for duplicate channels to rule this out.

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
(cherry picked from commit 14226be499d27935d54981f0a6e1b15fd65746cd)

0 files changed, 0 insertions, 0 deletions