this allows disabling and enabling it
it also prevents crashes if vfpv3 and neon are disabled which previously
would have enabled the flag

And last but not least one can enable setend on cpus like cortex-a8 where
its fast but disabled by default
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: James Almer <jamrial@gmail.com>
Reviewed-by: Hendrik Leppkes <h.leppkes@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

It now does 12 samples per iteration, up from 4.

From 1.8 to 3.2 times faster again.  3.6 to 5.7 times faster overall.
Runtime is reduced by a further 2 to 18%.  Overall runtime reduced by
4 to 50%.

Same conditions as before apply.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

This reduces code duplication and differences with the fork.
Signed-off-by: James Almer <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

From 1.8 to 2.4 times faster.  Runtime is reduced by 2 to 39%.  The
speed-up generally increases with compression_level.

This lpc encoder is not used with levels < 3 so it provides no speed-up
in these cases.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes compilation failures on msvc/icl shared builds
Signed-off-by: James Almer <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Thanks to Pascal Massimino and Michael Militzer for permission to use under LGPL

The xvid idct code is from xvid, and nearly unchanged to make future syncing easy
the integration into ffmpeg is done by the commiter
the commit message is written by the commiter
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libswscale uses the table but wasn't duplicating it like the rest of the libs.
This should fix compilation failures on msvc/icl after lavu stopped exporting
internal functions and tables.
Signed-off-by: James Almer <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'da7d839a':
  ffv1dec: check that global parameters do not change in version 0/1

Conflicts:
	libavcodec/ffv1dec.c

See: b05cd1eaMerged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '3187fa14':
  hevc_mvs: avoid deriving tmvp in amvp

See: 373677f9Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '14ca0aa6':
  hevc: wait proper position for tmvp

Conflicts:
	libavcodec/hevc_mvs.c

See: ed248e7fMerged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'cf6090dc':
  hevc: use intreadwrite

Conflicts:
	libavcodec/hevc_mvs.c

See: 7a4a5515Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'ed53cc21':
  hevc: derive partial merge list

Conflicts:
	libavcodec/hevc_mvs.c

See: 4576eff0Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '3505b196':
  hevc: derive partially amvp list

Conflicts:
	libavcodec/hevc_mvs.c

See: bbeaae96
See: 3ad04608Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '09182b32':
  hevc: simplify rounding

Conflicts:
	libavcodec/hevc_mvs.c

See: 2e471e47Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'd1b1c3bb':
  hevc: reorder loops

Conflicts:
	libavcodec/hevc.c

See: eca1957cMerged-by: Michael Niedermayer <michaelni@gmx.at>

Fixes mismatch in first keyframe in sample
ffvp9_fails_where_libvpx.succeeds.webm from ticket 3849. There's still
a second mismatch a few frames into the sample.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: James Almer <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: James Almer <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Such changes are neither allowed nor supported

Found-by: ami_stuff
Bug-Id: CVE-2013-7020
CC: libav-stable@libav.org
Signed-off-by: Anton Khirnov <anton@khirnov.net>

Reduces the number of calls to tmvp derivation from 933685 to 586271 on
a sequence.
Reviewed-by: Mickaël Raulet <mraulet@insa-rennes.fr>
Signed-off-by: Anton Khirnov <anton@khirnov.net>

The position is either rounded or not checked, so delay the wait to
check the proper value.
Reviewed-by: Mickaël Raulet <mraulet@insa-rennes.fr>
Signed-off-by: Anton Khirnov <anton@khirnov.net>

When dealing with MVs, both components may be processed at a time.
Signed-off-by: Anton Khirnov <anton@khirnov.net>

The merge list only needs to be derived up to the merge index.
Signed-off-by: Anton Khirnov <anton@khirnov.net>

When the candidate has been found, no need to derive others.
Signed-off-by: Anton Khirnov <anton@khirnov.net>

Signed-off-by: Anton Khirnov <anton@khirnov.net>

iterate over memory in a more continuous order
Signed-off-by: Anton Khirnov <anton@khirnov.net>

On mingw64 with c++11 support, the link libraries do contain a
nanosleep function, while it isn't exposed via the headers. Using
check_func_headers instead of a plain check_func fixes this
misdetection.
Suggested-by: Hendrik Leppkes <h.leppkes@gmail.com>
See: [FFmpeg-devel] [PATCH] fix: 'make' with mingw32
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: James Almer <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

It was wrongly being exported and used by libavfilter.
Signed-off-by: James Almer <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

If the allocated size, despite best efforts, is too small, exit
with the appropriate error.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

This has become necessary since the new mime field was added.
Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>

Fixes: snowf.avi
Found-by: Piotr Bandurski <ami_stuff@o2.pl>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes: ffvhuff_f.avi
Found-by: Piotr Bandurski <ami_stuff@o2.pl>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>