Commit bf0d2d60 introduced
av_warn_unused_result to avfilter/formats, whose associated warnings
were mostly fixed in 6aaac24d. This
fixes the issues in avfilter/avfiltergraph.

Tested with FATE.
Reviewed-by: Ronald S. Bultje <rsbultje@gmail.com>
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>

Long Term Prediction allows for prediction of spectral coefficients
via the previously decoded time-dependent samples. This feature
works well with harmonic content 2 or more frames long, like speech,
human or non-human, piano music or any constant tones at very low
bitrates.

It should be noted that the current coder is highly efficient and
the rate control system is unable to encode files at extremely
low bitrates (less than 14kbps seems to be impossible) so this
extension isn't capable of optimum operation. Dramatic difference
is observable with some types of audio and speech but for the most
part the audiable differences are subtle. The spectrum looks better
however so the encoder is able to harvest the additional bits that
this feature provies, should the user choose to enable it. So
it's best to enable this feature only if encoding at the absolutely
lowest bitrate that the encoder is capable of.

Apparently it was set to be enabled by default but after the
profile commits it was reverted to be off by default because
I didn't notice.
Works well so (re)enable it.

Needed because LTP uses predictor_present as well.

An oversight, probably because of copy-pasting the TNS line.

Functionally identical, doesn't change anything.

Doesn't change anything, just a slight clarification that
under all profiles TNS is currently off. That'll be soon to change
hopefully.

The encoder makes use of it in the following commits.

This ensures that they are always set to valid values
Fixes Ticket4939
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

This adds av_warn_unused_result to functions whose return codes need to
be checked.
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>

It's been argued that the benefits of the current implementation far outweight
those of making the structs opaque.

This deprecation is not present in any release, so it can be safely removed.
Reviewed-by: Ronald S. Bultje <rsbultje@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>

This does not trigger any warnings but adds robustness.
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>

The return code here should be checked.
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>

The open syscall can obviously fail, and its return code needs to be
checked.
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>

This should not trigger any warnings; but adds robustness.
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>

* commit '68e00ad6':
  w32pthreads: fix mingw build on x86 with -msse2 or higher
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit 'b5230793':
  wrapped_avframe: Drop a now-unused variable
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit '49d7fcd7':
  mpeg12: Unbreak building stale code
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit '504e3f75':
  aac: Make codec init run under ff_thread_once
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit '1f84b008':
  fate: Move screenpresso to the appropriate screen capture file
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit '2d591595':
  lavc: AV-prefix a few left out capabilities

Not applied, since this change breaks compilation and is not correct.
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit '9ef74817':
  cmdutils: Print general codec capabilities
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit 'e240a28b':
  cmdutils: Add auto to threading capabilities report
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

Fixes deadlock
Fixes Ticket4932
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

avcodec/ffv1dec: Clear slice coordinates if they are invalid or slice header decoding fails for other reasons

Fixes Ticket4931
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

They can return errors other than ENOMEM
Signed-off-by: James Almer <jamrial@gmail.com>

Signed-off-by: Timo Rothenpieler <timo@rothenpieler.org>

When SSE2 or higher compiler optimizations are used, mingw uses
the _mm_mfence intrinsic for MemoryBarrier, however it doesn't include
the appropriate headers automatically.
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

Broken in 2d591595

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>

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

Filters which support such changes should be excluded from these checks

Fixes Ticket4884
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

When SSE2 or higher compiler optimizations are used, mingw uses
the _mm_mfence intrinsic for MemoryBarrier, however it doesn't include
the appropriate headers automatically.

AVFrame.data[0] is not guaranteed to be set with a HWAccel