This was unnoticed on linux, since stdlib.h apparently includes
files declaring the pthread_mutex_t and pthread_cond_t types.
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
Testing gives 25-30% gain on HD clips with two threads and
up to 50% gain with eight threads.
Sliced threading uses more memory than single or frame threading.
Frame threading and single threading keep the previous memory
layout.
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
Associate segmentation_map[] with reference frame, rather than
decoding instance. This fixes cases where the map would be free()'ed
on e.g. a size change in one thread, whereas the other thread was
still accessing it. Also, it fixes cases where threads overwrite data
that is still being referenced by the previous thread, who thinks that
it's part of the frame previously decoded by the next thread.
