* commit 'e99ecda5':
  checkasm: add vp9 MC tests.
  vp9mc/x86: sse2 MC assembly.
  vp9mc/x86: add AVX and AVX2 MC
  vp9mc/x86: rename ff_* to ff_vp9_*
  vp9mc/x86: rename ff_avg[48]_sse to ff_avg[48]_mmxext
  vp9mc/x86: simplify a few inits.
  vp9mc/x86: add 16px functions (64bit only).

Noop (aside from a formatting comment in vp9mc.asm). We already have all
of this. We should consider making a final diff between the two projects
when the dust comes down.
Merged-by: NClément Bœsch <u@pkh.me>

* commit '89466de4':
  vp9/x86: rename vp9dsp to vp9mc

File was already renamed, only the top description is updated.
Merged-by: NClément Bœsch <u@pkh.me>

better quality without speedloss
Signed-off-by: NMuhammad Faiz <mfcc64@gmail.com>

avcodec/h264_cabac: Fix runtime error: negation of -2147483648 cannot be represented in type 'int'; cast to an unsigned type to negate this value to itself

Fixes: 858/clusterfuzz-testcase-5168477042114560

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpegSigned-off-by: NMichael Niedermayer <michael@niedermayer.cc>

Fixes: 857/clusterfuzz-testcase-5319093760557056

Benchmark changes from 335->333 (so if its not a random fluctuation then it would be faster)

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpegSigned-off-by: NMichael Niedermayer <michael@niedermayer.cc>

Signed-off-by: NMichael Niedermayer <michael@niedermayer.cc>

Signed-off-by: NMichael Niedermayer <michael@niedermayer.cc>

That pointer isn't used by absolutely anything.
Signed-off-by: NRostislav Pehlivanov <atomnuker@gmail.com>
Reviewed-by: NMichael Niedermayer <michael@niedermayer.cc>

* commit '89aebc5b':
  lavc: align the linesize to 32 when AVX is enabled
Merged-by: NJames Almer <jamrial@gmail.com>

* commit '63ac8e2d':
  lavu: add LOCAL_ALIGNED_32

This commit is a noop, see 25d5ea6dMerged-by: NJames Almer <jamrial@gmail.com>

* commit '3c504bc3':
  x86: deduplicate some constants
Merged-by: NJames Almer <jamrial@gmail.com>

* commit 'd3e4d406':
  h264dec: reset nb_slice_ctx_queued for hwaccel decoding

This commit is a noop, see 74480198Merged-by: NJames Almer <jamrial@gmail.com>

* commit 'e5b01972':
  m4vdec: Check for non-startcode 00 00 00 sequences in probe

This commit is a noop, see 7c1835c5Merged-by: NJames Almer <jamrial@gmail.com>

* commit '3ccec334':
  sbrdsp: Move a misplaced #endif directive to the right spot
Merged-by: NJames Almer <jamrial@gmail.com>

* commit 'e723dce6':
  dvbsubdec: Use NULL instead of 0 as pointer value

This commit is a noop. The affected code isn't in our tree.
Merged-by: NJames Almer <jamrial@gmail.com>

* commit 'fc94a1ac':
  Revert "libavutil: Use an intermediate variable in AV_COPY*U"

This commit is a noop.
Merged-by: NJames Almer <jamrial@gmail.com>

* commit '9806b9ab':
  Revert "Don't use expressions with side effects in macro parameters"

This commit is a noop.
Merged-by: NJames Almer <jamrial@gmail.com>

* commit 'f79d8474':
  intreadwrite: Use the __unaligned keyword on MSVC for ARM and x86_64
Merged-by: NJames Almer <jamrial@gmail.com>

* commit '230b1c07':
  intreadwrite: Add intermediate variables in the byteswise AV_W*() macros

Mostly a noop. Merged for cosmetic purposes.
See d83ff76cMerged-by: NJames Almer <jamrial@gmail.com>

* commit '014773b6':
  libavutil: Use an intermediate variable in AV_COPY*U

This commit is a noop. It would be reverted in a future merge either
way.
Merged-by: NJames Almer <jamrial@gmail.com>

* commit '25bacd0a':
  Don't use expressions with side effects in macro parameters

This commit is a noop. It would be reverted in a future merge either
way.
Merged-by: NJames Almer <jamrial@gmail.com>

Fixes multiple  runtime error: shift exponent 792 is too large for 32-bit type 'unsigned int'

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpegSigned-off-by: NMichael Niedermayer <michael@niedermayer.cc>

Fixes: 839/clusterfuzz-testcase-4871084446842880

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpegSigned-off-by: NMichael Niedermayer <michael@niedermayer.cc>

Benchmarks with START_TIMER indicate that the code is faster with unsigned, (that is
with the patch), there was quite some fluctuation in the numbers so this may be just
random

Fixes: 811/clusterfuzz-testcase-6465493076541440

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpegSigned-off-by: NMichael Niedermayer <michael@niedermayer.cc>

libnpp was erroneously grouped up with libfdk-aac and openssl to check
if --enable-nonfree wasn't passed only with --enable-gpl in
9f28db47. The latter two are compatible
with LGPL, libnpp is not.
Signed-off-by: NJames Almer <jamrial@gmail.com>

* commit '7ebdffc3':
  dxv: Check to make sure we don't overrun buffers on corrupt inputs
Merged-by: NClément Bœsch <u@pkh.me>

* commit 'e328178d':
  qsvdec: only access hwaccel_context is the pixel format is QSV
Merged-by: NClément Bœsch <u@pkh.me>

* commit 'ed1cd810':
  flac demuxer: improve probing

Suggested commit very closely matches our code, except with regards to
AVPROBE_SCORE_EXTENSION. The code layout is mostly merged but preserves
our behaviour.
Merged-by: NClément Bœsch <u@pkh.me>

* commit '5ebef79a':
  Fix instances of broken indentation found by gcc 6

Noop, see 21d3f0c0, 6089c44aMerged-by: NClément Bœsch <u@pkh.me>

* commit '5ed4644d':
  x11grab: Rename internal component to "xcbgrab"
Merged-by: NClément Bœsch <u@pkh.me>

* commit '4fef648d':
  Remove the legacy X11 screen grabber
Merged-by: NClément Bœsch <u@pkh.me>

* commit '8495d84f':
  ac3dec: Add some inline hints
Merged-by: NClément Bœsch <u@pkh.me>

* commit '3db51bf6':
  ac3dec: Simplify skipping
Merged-by: NClément Bœsch <u@pkh.me>

* commit 'f0ccc65b':
  ac3dec: Split coupling-specific code from decode_audio_block()
Merged-by: NClément Bœsch <u@pkh.me>

* commit 'a5ebe5d1':
  ac3dec: Split spx-specific code from decode_audio_block()
Merged-by: NClément Bœsch <u@pkh.me>

* commit '2ac00d2d':
  mov: Validate the ID number

This commit is a noop as the modified check is not present in FFmpeg.
See d30870cc.
Merged-by: NClément Bœsch <u@pkh.me>

* commit 'a115eb9e':
  mimic: do not release the newly obsolete reference at the end of decoding
Merged-by: NClément Bœsch <u@pkh.me>