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- /*
- * 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;
- }
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