mirror of https://git.ffmpeg.org/ffmpeg.git
145 lines
4.2 KiB
C
145 lines
4.2 KiB
C
/*
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* Copyright (c) 2011 Anton Khirnov
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/*
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* enumerate avoptions and format them in texinfo format
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*/
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#include <string.h>
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#include "libavformat/avformat.h"
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#include "libavcodec/avcodec.h"
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#include "libavutil/log.h"
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#include "libavutil/opt.h"
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static void print_usage(void)
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{
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fprintf(stderr, "Usage: enum_options type\n"
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"type: format codec\n");
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exit(1);
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}
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static void print_option(const AVClass *class, const AVOption *o)
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{
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printf("@item -%s @var{", o->name);
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switch (o->type) {
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case FF_OPT_TYPE_BINARY: printf("hexadecimal string"); break;
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case FF_OPT_TYPE_STRING: printf("string"); break;
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case FF_OPT_TYPE_INT:
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case FF_OPT_TYPE_INT64: printf("integer"); break;
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case FF_OPT_TYPE_FLOAT:
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case FF_OPT_TYPE_DOUBLE: printf("float"); break;
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case FF_OPT_TYPE_RATIONAL: printf("rational number"); break;
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case FF_OPT_TYPE_FLAGS: printf("flags"); break;
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default: printf("value"); break;
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}
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printf("} (@emph{");
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if (o->flags & AV_OPT_FLAG_ENCODING_PARAM) {
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printf("input");
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if (o->flags & AV_OPT_FLAG_ENCODING_PARAM)
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printf("/");
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}
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if (o->flags & AV_OPT_FLAG_ENCODING_PARAM)
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printf("output");
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printf("})\n");
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if (o->help)
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printf("%s\n", o->help);
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if (o->unit) {
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const AVOption *u = NULL;
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printf("\nPossible values:\n@table @samp\n");
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while ((u = av_next_option(&class, u)))
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if (u->type == FF_OPT_TYPE_CONST && u->unit && !strcmp(u->unit, o->unit))
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printf("@item %s\n%s\n", u->name, u->help ? u->help : "");
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printf("@end table\n");
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}
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}
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static void show_opts(const AVClass *class)
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{
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const AVOption *o = NULL;
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printf("@table @option\n");
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while ((o = av_next_option(&class, o)))
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if (o->type != FF_OPT_TYPE_CONST)
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print_option(class, o);
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printf("@end table\n");
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}
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static void show_format_opts(void)
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{
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const AVInputFormat *iformat = NULL;
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const AVOutputFormat *oformat = NULL;
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void *iformat_opaque = NULL;
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void *oformat_opaque = NULL;
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printf("@section Generic format AVOptions\n");
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show_opts(avformat_get_class());
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printf("@section Format-specific AVOptions\n");
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while ((iformat = av_demuxer_iterate(&iformat_opaque))) {
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if (!iformat->priv_class)
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continue;
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printf("@subsection %s AVOptions\n", iformat->priv_class->class_name);
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show_opts(iformat->priv_class);
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}
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while ((oformat = av_muxer_iterate(&oformat_opaque))) {
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if (!oformat->priv_class)
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continue;
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printf("@subsection %s AVOptions\n", oformat->priv_class->class_name);
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show_opts(oformat->priv_class);
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}
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}
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static void show_codec_opts(void)
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{
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void *iter = NULL;
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AVCodec *c = NULL;
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printf("@section Generic codec AVOptions\n");
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show_opts(avcodec_get_class());
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printf("@section Codec-specific AVOptions\n");
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while ((c = av_codec_iterate(&iter))) {
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if (!c->priv_class)
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continue;
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printf("@subsection %s AVOptions\n", c->priv_class->class_name);
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show_opts(c->priv_class);
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}
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}
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int main(int argc, char **argv)
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{
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if (argc < 2)
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print_usage();
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if (!strcmp(argv[1], "format"))
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show_format_opts();
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else if (!strcmp(argv[1], "codec"))
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show_codec_opts();
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else
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print_usage();
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return 0;
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}
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