build: Ensure that output directories for header objects are created
intreadwrite: tomi: Add missing attributes.h #include for av_always_inline
doc: filters: Correct BNF FILTER description

Signed-off-by: Diego Biurrun <diego@biurrun.de>
arm: vp8: Add missing #includes for header to compile standalone
dxva2: Add missing #define to make header compile standalone
x86: h264: Don't use redzone in AVX h264_deblock on Win64

This fixes crashes in chromium on win64 on machines with AVX
(crashes that apparently aren't triggered by fate).

Signed-off-by: Martin Storsjö <martin@martin.st>
4xm: check the return value of read_huffman_tables().

CC:libav-stable@libav.org
av_memcpy_backptr: avoid an infinite loop for back = 0

CC:libav-stable@libav.org
lagarith: avoid infinite loop in lag_rac_refill()

range == 0 happens with corrupted files

CC:libav-stable@libav.org
loco: check that there is data left after decoding a plane.

CC:libav-stable@libav.org
flicvideo: avoid an infinite loop in byte run compression

When byte_run is 0, pixel_countdown is not touched and the loop will run
forever.

CC:libav-stable@libav.org
mov: use the format context for logging.

CC:libav-stable@libav.org
mlpdec: do not try to allocate a zero-sized output buffer.

CC:libav-stable@libav.org
cavs: initialize various context tables to 0

Avoids crashes with corrupted files.

CC:libav-stable@libav.org
qtrle: add more checks against pixel_ptr being negative.

CC:libav-stable@libav.org
qtrle: cosmetics, reformat CHECK_PIXEL_PTR() macro
qtrle: use AV_LOG_ERROR in an error message.
libx264: change i_qfactor to use x264cli's default

This also allows libx264 to modify its i_qfactor value
when using the "-tune" setting. Previously it had a static
value of 1.25

Signed-off-by: Anton Khirnov <anton@khirnov.net>
pnm: add high-bitdepth PGMYUV support for both encoder and decoder
Remove pointless av_cold attributes in header files

The init functions marked as av_cold have to be executed in any case,
so there is no gain from trying to mark paths leading to such functions
as unlikely.