cmdutils: replace usages of "#ifdef __MINGW32__" with "#ifdef _WIN32" because MSVC only defines _WIN32

With the previous patch, this should fix ticket #3580 as well.

Signed-off-by: John Peebles <johnpeeb@gmail.com>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes ticket #3246.

Reviewed-by: Wei Gao <highgod0401@gmail.com>
Reviewed-by: Stefano Sabatini <stefasab@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Simplify.

The output is formatted to display one option per line.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fix warning:
In file included from ffprobe.c:2557:0:
cmdutils_common_opts.h:17:5: warning: initialization from incompatible pointer type [enabled by default]
cmdutils_common_opts.h:17:5: warning: (near initialization for ‘real_options[16].u.func_arg’) [enabled by default]

Spotted-by: Paul B Mahol

Quite useful for debugging.

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

Define positive return values as non errors and leave further meaning undefined
This allows future extensions to use these values

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Some C runtime implementations deadlock when calling threading functions
on the atexit() handler.

Use a simpler wrapper similar to av_log to call the cleanup function
before exit.

Bug-Id: 523

It will be useful outside of avprobe.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

I.e. input options to output files or vice versa.

Remove now unused cmdutils get_buffer() implementation.

This avoids per parameter changes in ffmpeg at the cost of making access
somewhat more annoying.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

This makes the code simpler and avoids mixing designated and
non-designated initializers in a potentially unsafe way in avconv.

It splits the commandline into a more convenient internal representation
for further parsing.

This will allow e.g.
- processing global options first independently of their location on the
  commandline, eliminating ugly hacks for processing e.g. cpuflags
  first
- better options validation and error reporting. It is now possible for
  the parser to know that it's applying an input option to an output
  file or vice versa and act accordingly.

This reverts commit 841bf0ef.
This does not fully work as the file is used before the filename is parsed
so not all information is written in the specified file.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Anonymous structs cannot be forward declared and have no benefit.

func2_arg is the same as func_arg, except it has one additional
parameter. Change all func_arg callbacks to take that parameter (and
ignore it).

Extract of the output:

| Individual channels:
| NAME        DESCRIPTION
| FL          front left
| FR          front right
| <snip>
| SDR         surround direct right
|
| Standard channel layouts:
| NAME        DECOMPOSITION
| mono        FC
| stereo      FL+FR
| <snip>
| octagonal   FL+FR+FC+BL+BR+BC+SL+SR
| downmix     DL+DR

Currently it takes a mask and value, such that options for which
(flags & mask) == value.

Change it to take required flags and forbidden flags instead. This is
shorter and simpler to understand.

This option does not do anything.

Also remove OPT_GRAB, since -isync is the last option using it.

show_foo() functions are declared as void show_foo(void), but called as
int show_foo(const char*, const char*).

Make it print a list of AVCodecDescriptors.

Add new -decoders and -encoders options that print lists of decoders and
encoders respectively.

Also use it in the declaration of the various exit_program
implementations in avtools.

inspired by a clang-scan report.