af_scaletempo2: fix crash when the number of channels increases

When af_scaletempo2.c:process() detects a format change, it goes back
through mp_scaletempo2_init() to reinitialize everything.  However,
mp_scaletempo2.input_buffer is not necessarily reallocated due to a
check in af_scaletempo2_internals.c:resize_input_buffer().  This is a
problem if the number of audio channels increases, since without
reallocating, the buffer for the new channel(s) will at best point to
NULL, and at worst uninitialized memory.

Since resize_input_buffer() is only called from two places, pull size
check out into mp_scaletempo2_fill_input_buffer().  This allows each
caller to decide whether they want to resize or not.  We could be
smarter about when to reallocate, but that would add a lot of machinery
for a case I don't expect to be hit often in practice.

0 files changed, 0 insertions, 0 deletions