Fixes e.g.:

ffmpeg -f lavfi -i testsrc -f lavfi -i testsrc -filter_complex "[0:v][1:v]psnr[out]" -f null none

Fixes many warnings:
initialization discards 'const' qualifier from pointer target type

avcodec/mjpegdec: Fix runtime error: signed integer overflow: -24543 * 2031616 cannot be represented in type 'int'

Fixes: 943/clusterfuzz-testcase-5114865297391616

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

Fixes: 940/clusterfuzz-testcase-5200378381467648

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

Fixes integer overflow
Fixes: 1292/clusterfuzz-testcase-minimized-5795512143839232
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

This avoids intermediates from overflowing (the final values are checked)
Fixes: runtime error: signed integer overflow: -167712 + -2147352576 cannot be represented in type 'int'

Fixes: 1298/clusterfuzz-testcase-minimized-5955580877340672

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

Fixes OOM
Fixes: 1314/clusterfuzz-testcase-minimized-4621997222920192

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

Fixes timeout
Fixes: 1306/clusterfuzz-testcase-minimized-6152296217968640

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

ossfuzz works better without it
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

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

Prevents compilation failures on libopus < 1.0.3
Regression since 37941878.

Reviewed-by: wm4 <nfxjfg@googlemail.com>
Reviewed-by: Aaron Levinson <alevinsn@aracnet.com>
Signed-off-by: James Almer <jamrial@gmail.com>

This allows fuzzing decoders with the same codec_id
We also avoid register all to allow the linker to prune unused sections and symbols
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

* commit '11a9320d':
  build: Move build-system-related helper files to a separate subdirectory

"ffbuild" directory name is used instead of "avbuild".
Merged-by: Clément Bœsch <u@pkh.me>

* commit 'f9edc734':
  ratecontrol: Drop xvid-rc-related struct members unused after a6901b9c

This commit is a noop, see 99b35a51Merged-by: Clément Bœsch <u@pkh.me>

* commit '5b26d3b7':
  nvenc: Update check for lookahead

This commit is a noop, see 67db4ff3Merged-by: Clément Bœsch <u@pkh.me>

* commit 'a0c443a3':
  aarch64: vp9itxfm: Use the offset parameter to movrel

This commit is a noop, see 8b11a89cMerged-by: Clément Bœsch <u@pkh.me>

* commit 'fc322d6a':
  tta: Convert to the new bitstream reader
  mlp: Convert to the new bitstream reader
  unary: Convert to the new bitstream reader

This merge is a noop, see
http://ffmpeg.org/pipermail/ffmpeg-devel/2017-April/209609.htmlMerged-by: Clément Bœsch <u@pkh.me>

* commit '45286a62':
  h264dec: make sure to only end a field if it has been started

This commit is a noop. Our h264 slicing handling is different and does
not seem to be affected by the issue.
Merged-by: Clément Bœsch <u@pkh.me>

The code does use 16bit sized arrays later so larger deltas would not work
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Fixes: 1280/clusterfuzz-testcase-minimized-6102353767825408

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

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

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

Because write_packet() fakely writes packets to muxer by queueing
them when muxer hasn't been initialized, it should also increment
frame_number fakely.
This is required because code in do_streamcopy() rely on
frame_number.

Should fix Ticket6227
Reviewed-by: James Almer <jamrial@gmail.com>
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Muhammad Faiz <mfcc64@gmail.com>

Fix fate failures:
    make fate-mov THREADS=32
Reviewed-by: wm4 <nfxjfg@googlemail.com>
Signed-off-by: Muhammad Faiz <mfcc64@gmail.com>

This complex (-1 2 6 2 -1) filter slightly less reduces interlace 'twitter' but better retain detail and subjective sharpness impression compared to the linear (1 2 1) filter.
Signed-off-by: Thomas Mundt <tmundt75@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>

Fixes ticket #6362.

The code it refers to was moved to decode.c in 00fb745a

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

Fixes the following warning:
libavcodec/mips/iirfilter_mips.c:57:5: warning: "HAVE_INLINE_ASM" is not defined

Fixes many warnings:
initialization discards 'const' qualifier from pointer target type

Fixes: 1290/clusterfuzz-testcase-minimized-5815578902134784
Fixes: timeout

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

Decreases the time spend decoding junk.

May fix: 1283/clusterfuzz-testcase-minimized-6221126759874560

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

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

Fixes out of memory

Fixes: 1282/clusterfuzz-testcase-minimized-5400131681648640

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: Micah Galizia <micahgalizia@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

the tested sample contain negative value in the red channel
need to be clip to zero, and not set to MAX_RED
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

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

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