/*

* Copyright (c) 2011 Anton Khirnov

*

* This file is part of Libav.

*

* Libav is free software; you can redistribute it and/or

* modify it under the terms of the GNU Lesser General Public

* License as published by the Free Software Foundation; either

* version 2.1 of the License, or (at your option) any later version.

*

* Libav is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

* Lesser General Public License for more details.

*

* You should have received a copy of the GNU Lesser General Public

* License along with Libav; if not, write to the Free Software

* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

*/

/*

* enumerate avoptions and format them in texinfo format

*/

#include <string.h>

#include "libavformat/avformat.h"

#include "libavcodec/avcodec.h"

#include "libavutil/log.h"

#include "libavutil/opt.h"

static void print_usage(void)

{

fprintf(stderr, "Usage: enum_options type\n"

"type: format codec\n");

exit(1);

}

static void print_option(const AVClass *class, const AVOption *o)

{

printf("@item -%s @var{", o->name);

switch (o->type) {

case FF_OPT_TYPE_BINARY: printf("hexadecimal string"); break;

case FF_OPT_TYPE_STRING: printf("string"); break;

case FF_OPT_TYPE_INT:

case FF_OPT_TYPE_INT64: printf("integer"); break;

case FF_OPT_TYPE_FLOAT:

case FF_OPT_TYPE_DOUBLE: printf("float"); break;

case FF_OPT_TYPE_RATIONAL: printf("rational number"); break;

case FF_OPT_TYPE_FLAGS: printf("flags"); break;

default: printf("value"); break;

}

printf("} (@emph{");

if (o->flags & AV_OPT_FLAG_ENCODING_PARAM) {

printf("input");

if (o->flags & AV_OPT_FLAG_ENCODING_PARAM)

printf("/");

}

if (o->flags & AV_OPT_FLAG_ENCODING_PARAM)

printf("output");

printf("})\n");

if (o->help)

printf("%s\n", o->help);

if (o->unit) {

const AVOption *u = NULL;

printf("\nPossible values:\n@table @samp\n");

while ((u = av_next_option(&class, u)))

if (u->type == FF_OPT_TYPE_CONST && u->unit && !strcmp(u->unit, o->unit))

printf("@item %s\n%s\n", u->name, u->help ? u->help : "");

printf("@end table\n");

}

}

static void show_opts(const AVClass *class)

{

const AVOption *o = NULL;

printf("@table @option\n");

while ((o = av_next_option(&class, o)))

if (o->type != FF_OPT_TYPE_CONST)

print_option(class, o);

printf("@end table\n");

}

static void show_format_opts(void)

{

AVInputFormat *iformat = NULL;

AVOutputFormat *oformat = NULL;

printf("@section Generic format AVOptions\n");

show_opts(avformat_get_class());

printf("@section Format-specific AVOptions\n");

while ((iformat = av_iformat_next(iformat))) {

if (!iformat->priv_class)

continue;

printf("@subsection %s AVOptions\n", iformat->priv_class->class_name);

show_opts(iformat->priv_class);

}

while ((oformat = av_oformat_next(oformat))) {

if (!oformat->priv_class)

continue;

printf("@subsection %s AVOptions\n", oformat->priv_class->class_name);

show_opts(oformat->priv_class);

}

}

static void show_codec_opts(void)

{

AVCodec *c = NULL;

printf("@section Generic codec AVOptions\n");

show_opts(avcodec_get_class());

printf("@section Codec-specific AVOptions\n");

while ((c = av_codec_next(c))) {

if (!c->priv_class)

continue;

printf("@subsection %s AVOptions\n", c->priv_class->class_name);

show_opts(c->priv_class);

}

}

int main(int argc, char **argv)

{

if (argc < 2)

print_usage();

av_register_all();

if (!strcmp(argv[1], "format"))

show_format_opts();

else if (!strcmp(argv[1], "codec"))

show_codec_opts();

else

print_usage();

return 0;

}