Avoid the warning `-Wempty-body`.

The end-marked was typoed in

f7edcac0

Bug-Id: 761

Unbreak make check.

This fixes builds with --disable-vda, which previously failed with
undefined references to CVImageBuffer* and CVPixelBuffer* functions.
Signed-off-by: NMartin Storsjö <martin@martin.st>

While pr is a valid POSIX.1 command, its usage in configure
is a little borderline and is possible to replace it with
printf.

Bug-Id: 913
Signed-off-by: NLuca Barbato <lu_zero@gentoo.org>

Signed-off-by: NLuca Barbato <lu_zero@gentoo.org>

It amounts to about 1/2 of the warnings generated and does not help
spotting anything useful.

Avoid false positives while syncing.

Bug-Id: ffmpeg/4086
Bug-Id: 879
Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>
Signed-off-by: NLuca Barbato <lu_zero@gentoo.org>

avio_tell returns an int64_t.

Bug-Id: CID 1339818

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

Additional improvements by Michael Niedermayer <michaelni@gmx.at>.
Signed-off-by: NVittorio Giovara <vittorio.giovara@gmail.com>

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

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

Fixes out of array reads.

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>
Signed-off-by: NVittorio Giovara <vittorio.giovara@gmail.com>

Avoid some confusion when the information is not present.

Bug-Id: 902

Copy pointers to AVPicture after memory has been allocated.
Fixes NULL pointers in AVPicture after a17a7661.
Signed-off-by: NLuca Barbato <lu_zero@gentoo.org>

Explain better which environment is discouraged and mention the
shortcuts names.

Originally based on the capture written by
Thilo Borgmann <thilo.borgmann@mail.de>.
Signed-off-by: NLuca Barbato <lu_zero@gentoo.org>

Assume that the default C compiler and the default ObjC compiler match
(default for OSX).
Signed-off-by: NLuca Barbato <lu_zero@gentoo.org>

And make one more informative.

And forward the logging contexts when needed.

And properly report the error when it happens.

Signed-off-by: NMartin Storsjö <martin@martin.st>

Silences warnings when using -Wshift-overflow (GCC 6+).
Found-by: NJames Almer <jamrial@gmail.com>

Use the result directly, removing an unneeded cast.

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

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

SGI RLE encoding is slighlty different than the one provided by rle
module (especially at high bit depth). The pixel count function however
does not change, so it is simply made library-public.

This is never mentioned in the specifications, and decoders work
just as fine without it. Update the fate references since the compressed
file is smaller.
Signed-off-by: NVittorio Giovara <vittorio.giovara@gmail.com>

VP8E_UPD_ENTROPY, VP8E_UPD_REFERENCE, VP8E_USE_REFERENCE were removed
from libvpx and the remaining values were never used here
Reviewed-by: NMichael Niedermayer <michael@niedermayer.cc>
Signed-off-by: NJames Zern <jzern@google.com>
Signed-off-by: NLuca Barbato <lu_zero@gentoo.org>