* commit 'b9ea301e':
  configure: Use a more sensible suffix for x86 assembly tempfiles
Merged-by: James Almer <jamrial@gmail.com>

* commit '5292e97c':
  configure: Document available options for the --toolchain parameter
Merged-by: James Almer <jamrial@gmail.com>

* commit '86499771':
  qsv: align surface width/height to 16.
Merged-by: James Almer <jamrial@gmail.com>

* commit 'ea2f72a2':
  configure: Don't assume a 16 byte aligned stack on BSDs on i386
Merged-by: James Almer <jamrial@gmail.com>

* commit 'deefca02':
  qsvenc: add the Access Unit Delimiter NAL Unit support
Merged-by: James Almer <jamrial@gmail.com>

* commit '3d6e76b9':
  qsvenc: Fix a typo of FrameRateExtD/FrameRateExtN
Merged-by: James Almer <jamrial@gmail.com>

* commit '847190eb':
  configure: Don't assume an aligned stack on clang on windows
Merged-by: James Almer <jamrial@gmail.com>

Fixes: 2018_03_23_poc.wav
Found-by: GwanYeong Kim <gy741.kim@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Signed-off-by: James Almer <jamrial@gmail.com>

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

Fixes ticket #6968

Set relevant filter parameters such that the result can easily be
checked with a waveform editor.
In particular, it makes it clear the silence_start is not accurate in
the current code.

0 is a valid value for silence_start

In mono mode, silence is detected in any single channel instead of all
of them simultaneously

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: James Almer <jamrial@gmail.com>

Signed-off-by: James Almer <jamrial@gmail.com>

Signed-off-by: James Almer <jamrial@gmail.com>

"color_space" is no longer a sytax element in libaom.
Signed-off-by: James Almer <jamrial@gmail.com>

Signed-off-by: James Almer <jamrial@gmail.com>

* commit '43778a50':
  Support AV1 encoding using libaom

This contains some extra changes taken from the libvpx encoder
wrapper, most of them contained in the set_pix_fmt() function.
Merged-by: James Almer <jamrial@gmail.com>

While the enums are defined in the libaom headers, it's not officially
supported.
Signed-off-by: James Almer <jamrial@gmail.com>

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

Fixes parsing of expressions like c0=c0+c0 or c0=c0|c0=c1.  Previously no
error was thrown and for input channels, only the last gain factor was used,
for output channels the source channel gains were combined.
Signed-off-by: Marton Balint <cus@passwd.hu>

The generic code should be able to finish the streams just fine initializing
and flushing the filters and codecs properly.

Fixes the following command:

ffmpeg -f lavfi -i "testsrc=d=0.1[out0];aevalsrc=0:d=0[out1]" -af apad -shortest -f framecrc -
Signed-off-by: Marton Balint <cus@passwd.hu>

Fixes ticket #6854 and the following simpler case:

ffmpeg -f lavfi -i testsrc=d=1 -f lavfi -i testsrc=d=0 -filter_complex overlay -f null none
Signed-off-by: Marton Balint <cus@passwd.hu>

* commit 'c438899a':
  Add AV1 video decoding support through libaom

This contains some extra changes taken from the libvpx decoder
wrapper, most of them contained in the set_pix_fmt() function.
Merged-by: James Almer <jamrial@gmail.com>

* commit '44a17310':
  ivf: Support VP9 and AV1 as well

See e8f0a463Merged-by: James Almer <jamrial@gmail.com>

* commit 'dd7e63af':
  configure: Restore original endianness test

The test was not changed in 67e8f476
Merging only the explanation.
Merged-by: James Almer <jamrial@gmail.com>

* commit '80a4e6a4':
  amf: Replace writer_id option with LIBAV_AMF_WRITER_ID constant

This commit is a noop, see 9ea6607dMerged-by: James Almer <jamrial@gmail.com>

* commit '31a53ab3':
  configure: Add check_as() helper function to simplify some expressions
Merged-by: James Almer <jamrial@gmail.com>

* commit '18dc1ff0':
  configure: Add check_ld() helper function to simplify some expressions
Merged-by: James Almer <jamrial@gmail.com>

* commit '9c37d765':
  configure: Add check_cc/require_cc helper functions to simplify some expressions
Merged-by: James Almer <jamrial@gmail.com>

Last segment indicated by mpd is not parsed.
Example stream: http://dash.akamaized.net/dash264/TestCasesIOP41/LastSegmentNumber/1/manifest_last_segment_num.mpd

This patch supports parsing of Supplemental Descriptor with @schemeIdUri set to http://dashif.org/guide-
lines/last-segment-number with the @value set to the last segment number.
Reviewed-by: Steven Liu <lq@onvideo.cn>

This crash was introduced by 8bbf2dac,
which could incorrectly overwrite the failure result from creating the
device.

Fixes ticket #7108.
Reviewed-by: wm4 <nfxjfg@googlemail.com>

Fixes CID1415951
Reviewed-by: Jun Zhao <mypopydev@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>