137 lines
4 KiB
C
137 lines
4 KiB
C
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/*
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* Copyright (c) 2012 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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* generate texinfo manpages for avoptions
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*/
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#include <stddef.h>
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#include <stdio.h>
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#include <string.h>
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#include <float.h>
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// print_options is build for the host, os_support.h isn't needed and is setup
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// for the target. without this build breaks on mingw
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#define AVFORMAT_OS_SUPPORT_H
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#include "libavutil/attributes.h"
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#include "libavutil/opt.h"
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/* Forcibly turn off deprecation warnings, which just add noise here. */
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#undef attribute_deprecated
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#define attribute_deprecated
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#include "libavcodec/options_table.h"
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#include "libavformat/options_table.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 AVOption *opts, const AVOption *o, int per_stream)
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{
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if (!(o->flags & (AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_ENCODING_PARAM)))
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return;
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printf("@item -%s%s @var{", o->name, per_stream ? "[:stream_specifier]" : "");
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switch (o->type) {
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case AV_OPT_TYPE_BINARY: printf("hexadecimal string"); break;
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case AV_OPT_TYPE_STRING: printf("string"); break;
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case AV_OPT_TYPE_INT:
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case AV_OPT_TYPE_INT64: printf("integer"); break;
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case AV_OPT_TYPE_FLOAT:
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case AV_OPT_TYPE_DOUBLE: printf("float"); break;
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case AV_OPT_TYPE_RATIONAL: printf("rational number"); break;
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case AV_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_DECODING_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) printf("output");
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if (o->flags & AV_OPT_FLAG_AUDIO_PARAM) printf(",audio");
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if (o->flags & AV_OPT_FLAG_VIDEO_PARAM) printf(",video");
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if (o->flags & AV_OPT_FLAG_SUBTITLE_PARAM) printf(",subtitles");
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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;
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printf("\nPossible values:\n@table @samp\n");
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for (u = opts; u->name; u++) {
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if (u->type == AV_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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}
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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 AVOption *opts, int per_stream)
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{
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const AVOption *o;
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printf("@table @option\n");
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for (o = opts; o->name; o++) {
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if (o->type != AV_OPT_TYPE_CONST)
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print_option(opts, o, per_stream);
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}
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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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printf("@section Format AVOptions\n");
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show_opts(avformat_options, 0);
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}
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static void show_codec_opts(void)
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{
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printf("@section Codec AVOptions\n");
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show_opts(avcodec_options, 1);
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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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printf("@c DO NOT EDIT THIS FILE!\n"
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"@c It was generated by print_options.\n\n");
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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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