Many of the functions from avfilter/formats can return errors, usually AVERROR(ENOMEM).
This propagates the return values.

All of these were found by using av_warn_unused_result, demonstrating its utility.

Tested with FATE. I am least sure of the changes to avfilter/filtergraph,
since I don't know what/how reduce_format is intended to behave and how it should
react to errors.

Fixes: CID 1325680, 1325679, 1325678.
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Previous version Reviewed-by: Nicolas George <george@nsup.org>
Previous version Reviewed-by: Clément Bœsch <u@pkh.me>
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>

* commit '6a23a342':
  mimic: drop AVPicture usage
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit '6fdd4c67':
  libschroedinger: Properly use AVFrame API
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit '901f9c0a':
  qtrle: Properly use AVFrame API
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit '17e41cf3':
  avcodec: Do not lock during init if there is no init function
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit '34ed5c2e':
  avformat: Do not use AVFMT_RAWPICTURE

Removal from ffmpeg.c not merged because some parts of avdevice
still use it
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit '16b0c929':
  avconv: Add loop option.
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit '11c5f438':
  dict: Change return type of av_dict_copy()
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit 'c1aac39e':
  build: add Solaris symbol versioning
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit 'b9ece15a':
  nullenc: Use the wrapped avframe pseudo-encoder
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit 'd00a8fd4':
  yuv4mpeg: Use the wrapped avframe pseudo-encoder
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit '00332e0a':
  wrapped_avframe: Initial implementation
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

Work on the AVFrame references directly.

Instead of setting up a flipped/swapped "view" on the pictures,
flip/swap them when returning decoded frames to the API user.

Rather than copying data buffers around, allocate a proper frame, and
use the standard AVFrame functions. This effectively makes the decoder
capable of direct rendering.
Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

Rather than copying data buffers around, just add a reference to
the current frame.
Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

Partially fixes Ticket 4727.

-duration is not a safe expression, since duration can be INT_MIN.
One might ask how it can become INT_MIN.
Although it is true that line 2574 is no longer reached with INT_MIN due
to commit 053e80f6 (which fixed another
integer overflow issue), mov_update_dts_shift is called on line 3549 as
well, right after a read of untrusted data.
One can do the fix locally there, but that function is already a huge
mess. Changing mov_update_dts_shift is likely better.

This changes duration to INT_MIN + 1 in such cases. This should not make any
practical difference since such streams are anyway fuzzer files.

Tested with FATE.
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>

FFABS(INT_MIN) is not safe. Alternative of using FFNABS is not as
readable.
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>

Reviewed-by: Henrik Gramner <henrik@gramner.com>
Signed-off-by: James Almer <jamrial@gmail.com>

This is the same test as for the 8bit case.

This avoid going through constants.c while still sharing them
with proresdsp.asm
Reviewed-by: "Ronald S. Bultje" <rsbultje@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

changing the context state and restoring it is not safe if another
thread writes data into the fifo
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

When scaling only a slice of a frame the output was written always
in the first lines leaving the rest of the frame black.

This patch fixes build of AAC encoder optimized for mips that was broken due
 to some changes in generic code that were not propagated to the optimized code.

Also, some functions in the optimized code are basically duplicate of functions
 from generic code. Since they do not bring enough improvement to the optimized
 code to justify their existence, they are removed (which improves
 maintainability of the optimized code).

Optimizations disabled in 97437bd1 are enabled again.
Signed-off-by: Nedeljko Babic <nedeljko.babic@imgtec.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

These aren't quite as helpful as the ones in 8bpp, since over there,
we can use pmulhrsw, but here the coefficients have too many bits to
be able to take advantage of pmulhrsw. However, we can still skip
cols for which all coefs are 0, and instead just zero the input data
for the row itx. This helps a few % on overall decoding speed.

The trouble with this function is that intermediates overflow 31+sign
bits, so I've added some helpers (that will also be used in 10/12bpp
8x8, 16x16 and 32x32) to make that easier, basically emulating a half-
assed pmaddqd using 2xpmaddwd. It's currently sse2-only, if anyone sees
potential in adding ssse3, I'd love to hear it.

In particular for 10 and 12 bits.
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>