Imported from Libav

For consistency with Libav.

This reduces diff with Libav. It also prevents a potential confusion
between the private context and the AVCodecContext.

This is following Libav layout to ease merges.

Entries are organized in descending chronological order.
Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>

Long overdue for removal, af_aresample should be used instead.
Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>

Could lead to random behavior. This possibly happened due to commit
32a5b631. This should/could probably be simplified, but for no apply
a minimal fix to quell the errors.
Tested-by: Michael Niedermayer <michael@niedermayer.cc>
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>

async_mutex has is used in a very strange but intentional way: it is
locked by default, and unlocked only in regions that can be run
concurrently.

If the user was calling API functions to the same context from different
threads (in a safe way), this could unintentionally unlock the mutex on
a different thread than the previous lock operation. It's not allowed by
the pthread API.

Fix this by emulating a binary semaphore using a mutex and condition
variable. (Posix semaphores are not available on all platforms.)
Tested-by: Michael Niedermayer <michael@niedermayer.cc>
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>

The old "API" that signaled rotation as a metadata value has been
replaced by DISPLAYMATRIX side data quite a while ago.

There is no reason to make muxers/demuxers/API users support both. In
addition, the metadata API is dangerous, as user tags could "leak" into
it, creating unintended features or bugs.

ffmpeg CLI has to be updated to use the new API. In particular, we must
not allow to leak the "rotate" tag into the muxer. Some muxers will
catch this properly (like mov), but others (like mkv) can add it as
generic tag. Note applications, which use libavformat and assume the
old rotate API, will interpret such "rotate" user tags as rotate
metadata (which it is not), and incorrectly rotate the video.

The ffmpeg/ffplay tools drop the use of the old API for muxing and
demuxing, as all muxers/demuxers support the new API. This will mean
that the tools will not mistakenly interpret per-track "rotate" user
tags as rotate metadata. It will _not_ be treated as regression.

Unfortunately, hacks have been added, that allow the user to override
rotation by setting metadata explicitly, e.g. via

  -metadata:s:v:0 rotate=0

See references to trac #4560. fate-filter-meta-4560-rotate0 tests this.
It's easier to adjust the hack for supporting it than arguing for its
removal, so ffmpeg CLI now explicitly catches this case, and essentially
replaces the "rotate" value with a display matrix side data. (It would
be easier for both user and implementation to create an explicit option
for rotation.)

When the code under FF_API_OLD_ROTATE_API is disabled, one FATE
reference file has to be updated (because "rotate" is not exported
anymore).
Tested-by: Michael Niedermayer <michael@niedermayer.cc>
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>

Squelches the following compiler warnings:

libavcodec/opusenc.c:1051:16: warning: format specifies type 'long' but
the argument has type 'long long' [-Wformat]
               avctx->bit_rate/1000, clipped_rate/1000);
               ^~~~~~~~~~~~~~~~~~~~
libavcodec/opusenc.c:1051:38: warning: format specifies type 'long' but
the argument has type 'long long' [-Wformat]
               avctx->bit_rate/1000, clipped_rate/1000);
                                     ^~~~~~~~~~~~~~~~~

Reviewed-by: "Ronald S. Bultje" <rsbultje@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

This was skipped in c17563c5 because
it depended on the filter setup merge, but was forgotten after that
actually happened.

Fixes hwaccel fate for stream size change tests.

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

Fixes: 712/clusterfuzz-testcase-6647676227551232

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

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

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

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

It's a simplifaction of the same code, originally commited as 3b5ad8fb.
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: James Almer <jamrial@gmail.com>

It's a simplifaction of the same code, originally commited as b4b9a64b.
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: James Almer <jamrial@gmail.com>

Changes to the parsing code originally committed to mpegvideo_parser.c
in 73fb23dc.
Required by some samples, like PVA_test-partial.pva
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: James Almer <jamrial@gmail.com>

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

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

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

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

The first case was forgotten in 89790ba2.

Note: build_only=yes is one of the case where hiding the errors makes
sense.

libavcodec/xface.c:318:27: warning: assuming signed overflow does not occur when assuming that (X - c) > X is always false [-Wstrict-overflow]

Fixes empty statement, found by ubitux
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Signed-off-by: Thomas Turner <thomastdt@googlemail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Fixes #6214 and vsynth1-dnxhd-720p-hr-lb.
Signed-off-by: Paul B Mahol <onemda@gmail.com>

Unrolling the loops triplicates the size of the assembled output
while not generating any gain in performance.

* commit 'fbe425c8':
  hap: Adjust printf length modifiers to match variable types

This commit is a noop, see 5a51ca2dMerged-by: Clément Bœsch <u@pkh.me>

* commit '1263b203':
  Adjust printf conversion specifiers to match variable signedness
Merged-by: Clément Bœsch <u@pkh.me>

* commit 'ca1e5eea':
  Remove some pointless TRACE level debug code
Merged-by: Clément Bœsch <u@pkh.me>

* commit '07eea5a5':
  nut: Drop pointless TRACE level debug code
Merged-by: Clément Bœsch <u@pkh.me>

* commit 'c3dad1bf':
  nsv: Drop unnecessary TRACE level debug code
Merged-by: Clément Bœsch <u@pkh.me>