Some parts of the code are based on a patch by
Timo Rothenpieler <timo@rothenpieler.org>

Merges Libav commit b9129ec466.

Due to the name clash with our cuvid decoder, rename it to nvdec.

This commit also changes the Libav code to dynamic loading of the
cuda/cuvid libraries.

Signed-off-by: Timo Rothenpieler <timo@rothenpieler.org>

Based on a patch by Aaron Levinson.

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

Fixes ticket #6812

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

It is licensed under Apache 2.0.

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

id3v2 code is compiled unconditionally and uses zlib when available.

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

Deprecated (aka removed) in OSX 10.11, and we have a replacement for it
(VideoToolbox).

We now require 2.1+ with pkg-config.

Signed-off-by: Michael Bradshaw <mjbshaw@google.com>

Helps with use cases such as static linking, as the .pc file
does actually contain the necessary Libs.private entries for all
required dependencies.

(cherry picked from commit 10eb496d9a)

Also improves the metadata and generally makes the configuration
a bit cleaner.

(cherry picked from commit ac12486714)

(cherry picked from commit 7a4fac5e91)

(cherry picked from commit b78c30d7ec)

This is able to modify some header metadata found in the VPS/SPS/VUI,
and can also add/remove AUDs.

(cherry picked from commit b31a9eae02)

This applies a specific fixup to some Blu-ray streams which contain
redundant PPSs modifying irrelevant parameters of the stream which
confuse other transformations which require correct extradata.

A new single global PPS is created, and all of the redundant PPSs
within the stream are removed.

(cherry picked from commit e6874bc3af)

This is able to modify some header metadata found in the SPS/VUI,
and can also add/remove AUDs and insert user data in SEI NAL units.

(cherry picked from commit 9e93001b61)
(cherry picked from commit c42b62d1f9)

Supports all streams that the coded bitstream infrastructure does
(currently H.264, H.265 and MPEG-2).

(cherry picked from commit f11d8a5e8b)

(cherry picked from commit 2bc9ba8d3c)
(cherry picked from commit a41b69b5eb)

(cherry picked from commit 867381b8b5)
(cherry picked from commit f763489364)
(cherry picked from commit 067a9ddeb8)

(cherry picked from commit acf06f4544)
(cherry picked from commit 768eb9182e)
(cherry picked from commit e7f64191b2)

(cherry picked from commit 18f1706f33)
(cherry picked from commit 44cde38c8a)

Fixes ticket #6740

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

Should fix ticket #6738

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

Should be more complete than the now fallback checks.

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

Should prevent some options from being added to cflags when they
don't exist and the compiler only warns about it.

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

The library has several dependencies that vary between systems.
Their pkg-config properly lists them all.

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

Debugged with the help of Reino Wijnsma.

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

Two of them are missing it in their pkg-config file, so adding it
here is a workaround until said pkg-config files are fixed.

Debugged with the help of Reino Wijnsma.

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

Should fix checks with static builds.

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

Fixes regression since 6dfcbd80ad
and 734ed38931.

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

There's a bug in configure where they are not being resolved right,
so make them explicit deps for avutil for now.

(cherry-picked from libav commit 41262498ff)
Signed-off-by: James Almer <jamrial@gmail.com>

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

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

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

This feature was never used for anything.

libxavs may require pthreads and libm at link time, and without
said ldflags available as global extralibs, the check will fail.

Regression since 6dfcbd80ad.

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

Tested-by: wm4
Signed-off-by: James Almer <jamrial@gmail.com>

There's no indev named libv4l2.

Fixes ticket #6729

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

We are not using dynamic loading for libndi.

Reviewed-by: James Almer <jamrial@gmail.com>
Signed-off-by: Marton Balint <cus@passwd.hu>

We don't need libdl for win32/mingw.

Reviewed-by: James Almer <jamrial@gmail.com>
Signed-off-by: Marton Balint <cus@passwd.hu>

These extralibs are set by pkg-config already.

fork() is never used conditionally.

It should be sys/soundcard.h nowadays.