* commit '4cf2ffb7':
  idct: Have function pointer prototype match implementation
Merged-by: Clément Bœsch <u@pkh.me>

* commit '39cea657':
  aactab: Move extern keyword to the front of array declarations
Merged-by: Clément Bœsch <u@pkh.me>

* commit '85baef4f':
  vf_drawtext: Move static keyword to beginning of variable declaration

This commit is mostly a noop, see:
d9e2aceb
6d7aa437Merged-by: Clément Bœsch <u@pkh.me>

* commit '636515c3':
  examples/decode_video: remove a stray unrelated comment

This commit is a noop, see 8c4753f7Merged-by: Clément Bœsch <u@pkh.me>

* commit '8191f960':
  examples/decode_video: constify the AVCodec instance
Merged-by: Clément Bœsch <u@pkh.me>

* commit '5b4d7ac7':
  examples/encode_video: use the AVFrame API for allocating the frame
Merged-by: Clément Bœsch <u@pkh.me>

Consistent with other examples.

* commit 'd0a603a5':
  examples/encode_video: set the framerate
Merged-by: Clément Bœsch <u@pkh.me>

* commit 'e0252402':
  examples/encode_video: constify the AVCodec instance
Merged-by: Clément Bœsch <u@pkh.me>

* commit '7b1f0347':
  examples/avcodec: split the remaining two examples into separate files
Merged-by: Clément Bœsch <u@pkh.me>

* commit '90265814':
  examples/decode_audio: constify the AVCodec instance
Merged-by: Clément Bœsch <u@pkh.me>

* commit 'f5df897c':
  examples/avcodec: split audio decoding into a separate example
Merged-by: Clément Bœsch <u@pkh.me>

* commit 'f76698e7':
  examples/encode_audio: use the AVFrame API for allocating the data
Merged-by: Clément Bœsch <u@pkh.me>

* commit 'c00a11ab':
  examples/encode_audio: constify AVCodec instances
Merged-by: Clément Bœsch <u@pkh.me>

* commit '40aaa8da':
  examples/avcodec: split audio encoding into a separate example
Merged-by: Clément Bœsch <u@pkh.me>

Get rid of the "ret" variable, and always use err. Report the packet as
consumed if err is unset. This should be equivalent to the old code,
which obviously required err=0 for p->result>=0 (and otherwise,
p->result must have had the value err was last set to). The code block
added by commit 32a5b631 is also not needed anymore, because the new
code strictly returns err if it's >=0.
Reviewed-by: "Ronald S. Bultje" <rsbultje@gmail.com>

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

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

Intra-only codecs should either be able to read these items from the
bitstream, or they should be set upon codec initialization. In both
cases, syncing these items at runtime is unnecessary.

In practice, this fixes race conditions for decoders that read these
values from the bitstream.

This prevents a race condition in files with multiple slices per frame.

The patch introduces race conditions.

This allows vp9dsp.h to only include the VP9 types header, and not the
decoder skeleton interface which is for hardware decoders (dxva2/vaapi).

The advantage here is that the internal software decoder interface is
not exposed to the DSP functions or the hardware accelerations.

If ret is NULL, a dummy common holder is created to hold *all* the
parallel function returns, which gets written concurrently. This commit
simplify the whole logic by simply not writing to that holder when not
set.

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

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

Needed for the C+11 atomics. Also change add_cxxflags to check_cxxflags.
Reviewed-by: James Almer <jamrial@gmail.com>
Signed-off-by: Marton Balint <cus@passwd.hu>

Reviewed-by: Matthieu Bouron <matthieu.bouron@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>