Instead of setting FFLIBS in each library Makefile configure
exports FFLIBS-$library in config.mak.

It leverages the new hwaccel 1.2 features:

- get_buffer2 is never called
- the internal context is automatically initialized/deinitialized
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

Signed-off-by: Anton Khirnov <anton@khirnov.net>

Move the dxva check after the dependencies have been detected, make sure
the ole32 library exists.

Fixes build on non-Windows.

Signed-off-by: Anton Khirnov <anton@khirnov.net>

Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>

The first line of the "armcc --vsn" output in one version is
"Product: ARM Compiler 5.04".
Signed-off-by: Martin Storsjö <martin@martin.st>

Introduce the `font` option and make it optional to pass a fontfile.
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

Further performance improvements and security fixes by
Vittorio Giovara, Luca Barbato and Diego Biurrun.
Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
Signed-off-by: Diego Biurrun <diego@biurrun.de>

Additional fixes and enhancements by Vittorio Giovara, Gonzalo Garramuno,
Nicolas George, Paul B Mahol and Michael Niedermayer.
Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

Build 13 has a crucial fix which makes x265_encode_headers work
as its always been documented.

Previous to this, the check was incorrect.

Also allows for use of the repeat headers flag.
Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>

This allows for more elegant dependency and object declarations.

The DCBZL instruction is not available for the e500v1 and e500v2
architectures, but may still be recognized by the toolchain, so we
need to explicitly disable it for these architectures.

References: PowerPC™ e500 Core Family Reference Manual (Freescale)
Found-by: Ståle Kristoffersen <staalebk@ifi.uio.no>
Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

Unbreaks windows systems not providing pkgconf files.
Reported-By: Rafaël Carré <funman@videolan.org>

Only enable it for CPUs that support it.
This restores the behavior prior to 7a650caf.

Drop the mpegvideo dependency for svq3 in configure.

Group checks into logical groups and sort alphabetically within those groups
unless checks have close coupling. Keep closely coupled checks together.

SPARC is no longer being used in any multimedia-related fields and the
VIS optimizations only represent a maintenance burden.

Previously, it was an implicit dependency through mpegvideo. Change
this, as implicit dependencies can cause all sorts of trouble.

ffv1 does not use any part of the dsputil framework.

It should work best for debian stable and people not installing the .pc
file.

Should be used only to pass extra flags to pkgconf invocation,
e.g. --static.
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

Sort lists of components. Add some whitespace where it helps readability.
Consistently use double instead of single quotes around component lists.

The current release of version 1 uses libopenjpeg1.

The values of {FLT,DBL}_{MAX,MIN} macros on some systems (older musl
libc, some BSD flavours) are not exactly representable, i.e.
(double)DBL_MAX == DBL_MAX is false
This violates (at least some interpretations of) the C99 standard and
breaks code (e.g. in vf_fps) like
double f = DBL_MAX;
[...]
if (f == DBL_MAX) { // f has not been changed yet
    [....]
}