Improve the compatibility with other software.

The `hq_ac_vlc.table` is incomplete, so unaccounted symbol return -1
as value.

This correction was suggested to me by Michael Niedermayer
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

And document both `draw` and `alpha`.
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

Useful to understand where and in what execution state a certain message
is generated. It is enabled only when optimizations are disabled, since
function names are not printed otherwise.
Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

Value is stored as a byte.

It is required by ptrdiff_t, fixes make checkheaders.

warning: assigning to
      'char *' from 'const char *' discards qualifiers
      [-Wincompatible-pointer-types-discards-qualifiers]

Bug-Id: CID 1026763

Bug-Id: CID 1295124

The FATE server does not report this information anyway and omitting
it makes the successful run send much less data.
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

Use direcly avio_w8().
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

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

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

This field is mandatory in dynamic manifests.
Signed-off-by: Martin Storsjö <martin@martin.st>

Bug-Id: CID 1265785
Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

Bug-Id: CID 1267902
CC: libav-stable@libav.org
Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

Bug-Id: CID 1291564
Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

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

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

ac may be NULL and then accessing ac->avctx results in a segmentation fault.
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>

warning: incompatible
      pointer types assigning to 'me_cmp_func' (aka 'int (*)(struct
      MpegEncContext *, uint8_t *, uint8_t *, ptrdiff_t, int)') from 'int
      (MpegEncContext *, uint8_t *, uint8_t *, int, int)'
      [-Wincompatible-pointer-types]

Fix a rather lengthy initialization warning from clang.

nlvl_to and nlvl_from can be set to 1 if both alias and target files
are in the same directory, so actually check the first character of the
string. We can do this because MacOS filepaths (alis type 2) are always
converted to UNIX filepaths (alis type 18).

Absolute paths can be stored in alis type 2 and 18 according to my research:
the first is the canonical MacOS filepath, with path level separated by
colons, and the volume name within the filepath, while the second should be the
absolute filesystem path from the mount point.

Based on work by Kostya Shishkov <kostya.shishkov@gmail.com>.
Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

Add some bounds checking to CLLC; reduce HQX variable scoping,
add an error message.

They belong to the same family of codecs.

Inspired by a patch from Ferdinand Oeinck <ferdo@demon.nl>.
Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

In preparation for multithreaded decoding.

This applies to every library where performance is not critical.

And deprecate av_dlog macro.

CC: libav-stable@libav.org
Signed-off-by: Anton Khirnov <anton@khirnov.net>