Based on the H264 SEI implementation.
Reviewed-by: Hendrik Leppkes <h.leppkes@gmail.com>
Reviewed-by: Aaron Levinson <alevinsn@aracnet.com>
Signed-off-by: James Almer <jamrial@gmail.com>

Fixes out of array access
Fixes: 1345/clusterfuzz-testcase-minimized-6062963045695488

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

Fixes: 1342/clusterfuzz-testcase-minimized-5490842129137664

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

Fixes: 1341/clusterfuzz-testcase-minimized-5441502618583040

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

Fixes: 1340/clusterfuzz-testcase-minimized-4669892148068352

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

Fixes: 1339/clusterfuzz-testcase-minimized-4614671485108224

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

Fixes: 1338/clusterfuzz-testcase-minimized-6485546354343936

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

* commit 'b68e3531':
  qsvdec: do not sync PIX_FMT_QSV surfaces
Merged-by: Clément Bœsch <cboesch@gopro.com>

* commit 'ac3c3ee6':
  dxva2: allow an empty array of ID3D11VideoDecoderOutputView

This commit is a noop, see 8fb48659Merged-by: Clément Bœsch <cboesch@gopro.com>

* commit 'f67235a2':
  dxva2: get the slice number directly from the surface in D3D11VA

This commit is a noop, see 153b36fcMerged-by: Clément Bœsch <cboesch@gopro.com>

* commit '122de16d':
  Replace cmdutils_common_opts.h by a macro
Merged-by: Clément Bœsch <cboesch@gopro.com>

* commit '2a2889e1':
  build: Remove stray duplicate conditional variable declaration

This commit is a noop, there is no duplicate in FFmpeg. we have the
tools rules kept in the root Makefile though (see
802d94c3)
Merged-by: Clément Bœsch <cboesch@gopro.com>

Fixes: 1337/clusterfuzz-testcase-minimized-5212314171080704

Fixes the existence of a potentially invalid pointer intermediate

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

Fixes: 1336/clusterfuzz-testcase-minimized-4761381930795008

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

Fixes: out of array access
Fixes: 1348/clusterfuzz-testcase-minimized-6195673642827776

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

* commit '89725a85':
  vaapi_h264: Scale log2_max_pic_order_cnt_lsb with max_b_frames

This commit is a noop, see eefa4b76Merged-by: Clément Bœsch <cboesch@gopro.com>

* commit 'a3c3a5ea':
  vaapi_encode: Support forcing IDR frames via AVFrame.pict_type

This commit is a noop, see c667c097Merged-by: Clément Bœsch <cboesch@gopro.com>

* commit '37fab066':
  vaapi_encode: Fix GOP sizing

This commit is a noop, see 760f1a77Merged-by: Clément Bœsch <cboesch@gopro.com>

* commit 'bd6496fa':
  interplayvideo: Convert to the new bitstream reader
  adx: Convert to the new bitstream reader
  dvbsubdec: Convert to the new bitstream reader
  motionpixels: 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 '00b6a765':
  hmac: Explicitly convert types at function pointer assignment
Merged-by: Clément Bœsch <cboesch@gopro.com>

* commit 'e435beb1':
  crypto: consistently use size_t as type for length parameters
Merged-by: Clément Bœsch <cboesch@gopro.com>

* commit 'f1af37b5':
  h264dec: make ff_h264_decode_init() static
Merged-by: Clément Bœsch <cboesch@gopro.com>

* commit 'e7de05f9':
  h264dec: drop a redundant check

This commit is a noop, see 4cc1ce4aMerged-by: Clément Bœsch <cboesch@gopro.com>

* commit '3cba1ad7':
  x86inc: Avoid using eax/rax for storing the stack pointer

This commit is a noop, see cd09e3b3Merged-by: Clément Bœsch <cboesch@gopro.com>

* commit 'e199a809':
  Changelog: mention the new avbuild/ directory
Merged-by: Clément Bœsch <cboesch@gopro.com>

* commit '4e62b57e':
  fate: Skip the checkasm test if CONFIG_STATIC is disabled
Merged-by: Clément Bœsch <cboesch@gopro.com>

* commit '2835e9a9':
  hevcdec: add P010 support for D3D11VA

This commit is a noop, see ccb94789Merged-by: Clément Bœsch <cboesch@gopro.com>

* commit '0ac2d86c':
  dxva2: Factorize DXVA context validity test into a single macro

This commit is (mostly) a noop, see 77742c75Merged-by: Clément Bœsch <cboesch@gopro.com>

* commit 'f8a42d4f':
  dxva2: Make ff_dxva2_get_surface() static and drop its name prefix

This commit is a noop, see fd0716b3Merged-by: Clément Bœsch <cboesch@gopro.com>

* commit '9026ec8a':
  matroskadec: make sure not to leave EbmlBin in an inconsistent state

This commit is a noop, see 5e1bacf2Merged-by: Clément Bœsch <cboesch@gopro.com>

* commit '9b1db2d3':
  vaapi_h264: Fix POC on IDR frames

This commit is a noop, see e72662e1Merged-by: Clément Bœsch <cboesch@gopro.com>

* commit 'd08e02d9':
  vaapi_h265: Fix build failure with old libva without 10-bit surfaces

This commit is a noop, see b9514756Merged-by: Clément Bœsch <cboesch@gopro.com>

* commit '85ad5ea7':
  aarch64: vp9mc: Fix a comment to refer to a register with the right name

This commit is a noop, see 0ba01875Merged-by: Clément Bœsch <cboesch@gopro.com>

* commit '65074791':
  aarch64: vp9dsp: Fix vertical alignment in the init file

This commit is a noop, see 02cfb9a1Merged-by: Clément Bœsch <cboesch@gopro.com>

* commit 'c536e5e8':
  arm: vp9mc: Fix vertical alignment of operands

This commit is a noop, see 656d9109Merged-by: Clément Bœsch <cboesch@gopro.com>

* commit 'd31f46e1':
  cmdutils: update copyright year to 2017

This commit is a noop, see d800d48fMerged-by: Clément Bœsch <cboesch@gopro.com>

* commit 'ee164727':
  configure: Fix typo in incdir variable written to config.sh

This commit is a noop, see 6fdd35a3Merged-by: Clément Bœsch <cboesch@gopro.com>

* commit 'eef860dd':
  fate: Tweak printing of ignored tests
Merged-by: Clément Bœsch <cboesch@gopro.com>

* commit '5c83b4d5':
  fate: Unset the sig variable if ignoring a test failure
Merged-by: Clément Bœsch <cboesch@gopro.com>