* commit '624aa8ab':
  build: Add missing Makefile entries and ifdefs for QSV hwaccels
Merged-by: James Almer <jamrial@gmail.com>

* commit 'c833c203':
  build: Ensure that the "all" target appears before all Makefile includes
Merged-by: James Almer <jamrial@gmail.com>

* commit '6bd9590b':
  build: Have old H.264/HEVC nvenc encoders select their new counterparts
Merged-by: James Almer <jamrial@gmail.com>

* commit '3e105d08':
  build: Move entries related to building TOOLS to a subdirectory Makefile
Merged-by: James Almer <jamrial@gmail.com>

* commit '4104cc56':
  build: Warn that reconfiguration is necessary if version.h files changed
Merged-by: James Almer <jamrial@gmail.com>

* commit 'f22da2cd':
  configure: add -fPIE instead of -pie to C flags for ThreadSanitizer

This commit is a noop, see 3f55752cMerged-by: James Almer <jamrial@gmail.com>

* commit '404cb747':
  configure: Pass CFLAGS_HEADERS through the right CFLAGS filter
Merged-by: James Almer <jamrial@gmail.com>

* commit '9265364b':
  build: Separate avisynth and avxsynth support

Mostly noop, since it could break linux configure with --enable-avisynth,
and the configure code which was simplified isn't even present in
ffmpeg.

Only merged the cosmetic re-ordering in the Makefile.
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

Fixes some valgrind warnings.
Reviewed-by: Rostislav Pehlivanov <atomnuker@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>

Signed-off-by: Matthew Gregan <kinetik@flim.org>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

The custom callback can cause significant CPU usage on Windows for some large
files with many index entries for some reason.

v2: Move check after parsing options.
Signed-off-by: Marton Balint <cus@passwd.hu>

Signed-off-by: Marton Balint <cus@passwd.hu>

Fixes ticket #6285.
Signed-off-by: Marton Balint <cus@passwd.hu>

~20% faster than AVX.
Signed-off-by: James Almer <jamrial@gmail.com>

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

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

Tested-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: James Almer <jamrial@gmail.com>

Based on the draft spec at http://vfrmaniac.fushizen.eu/contents/opus_in_isobmff.htmlSigned-off-by: Matthew Gregan <kinetik@flim.org>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Based on the draft spec at http://vfrmaniac.fushizen.eu/contents/opus_in_isobmff.html

'-strict -2' is required to create files in this format.
Signed-off-by: Matthew Gregan <kinetik@flim.org>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

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

Fixes use of uninitialized data
Found-by: Thomas Guilbert <tguilbert@google.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

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

FF_ARRAY_ELEMS returns a size_t value.

Reviewed-by: ubitux
Signed-off-by: James Almer <jamrial@gmail.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Add av_strireplace() into APIChanges
Reviewed-by: James Almer <jamrial@gmail.com>
Signed-off-by: Steven Liu <lq@chinaffmpeg.org>

Use AVBprint to implement av_strreplace
add av_strreplace test case TEST_STRREPLACE
Reviewed-by: Nicolas George <george@nsup.org>
Signed-off-by: Steven Liu <lq@chinaffmpeg.org>

This avoids potential undefined behavior in debug mode while still allowing
developers which want to check for potential additional overflows to do so
by manually enabling this.

Reviewed-by: wm4
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

This reverts commit aed84ee4.

It is a false positive from Valgrind with recent GCC and
-funswitch-loops (present in -O3).