This avoids spurious library rebuilds when only the test program
code is changed and simplifies the build system.

This includes documentation and other modifications by
Lukasz Marek and Martin Storsjö.
Signed-off-by: Martin Storsjö <martin@martin.st>

Also add const to pointers in static functions within opt.c where
possible/necessary.
Signed-off-by: Martin Storsjö <martin@martin.st>

CC: libav-stable@libav.org
Bug-Id: CID 1257771

Signed-off-by: Diego Biurrun <diego@biurrun.de>

In order to support metadata being set as an option, it's necessary to be able
to set dictionaries as values.
Signed-off-by: Anton Khirnov <anton@khirnov.net>

It does not make sense in the vast majority of use cases, no currently
defined AV_OPT_TYPE_FLAGS options in Libav set the range to anything
nontrivial, and many of those get it wrong (the "correct" range is
INT_MIN to INT_MAX so that the builtin constant "all" works).

AVIOContext has got an av_class member that only gets set if
opening the context using avio_open2, but not if allocating a
custom IO context. A caller that wants to read AVOptions from
an AVIOContext (recursively using AV_OPT_SEARCH_CHILDREN) may
not know if the AVIOContext actually has got a class set or not.
Signed-off-by: Martin Storsjö <martin@martin.st>

The named constant needs to be searched for in the same object on which
the option is set, i.e. target_obj.

%f denotes a double argument and 'l' does nothing in this case
according to the C spec.

CC: libav-stable@libav.org

This allows parsing of special-case negative numbers like decibels.

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

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

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

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

Double does not have enough precision to represent all int64 numbers
exactly.

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

These files use NAN/INFINITY but didn't include mathematics.h to get
the fallback definitions if the system lacks the macros.
Signed-off-by: Martin Storsjö <martin@martin.st>

Introduce a new function to set binary data through AVOption,
avoiding having to convert the binary data to a string inbetween.
Signed-off-by: Martin Storsjö <martin@martin.st>

With the changes in 3b3ea346,
"Remove all uses of deprecated AVOptions API", av_opt_flag_is_set
was broken, since it now uses av_opt_find, which doesn't return
named constants unless a unit to look for the constant in is given.

This broke enabling LATM encapsulated AAC output in RTP.
Signed-off-by: Martin Storsjö <martin@martin.st>

Just for naming consistency, no functional changes.

Split actual writing to read_number() in the same way as write_number().
Allows set_string_number() to write to a caller-provided destination.