/* * Copyright (c) 2011 Anton Khirnov * * This file is part of FFmpeg. * * FFmpeg 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. * * FFmpeg 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 FFmpeg; 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){    const AVInputFormat *iformat = NULL;    const AVOutputFormat *oformat = NULL;    void *iformat_opaque = NULL;    void *oformat_opaque = NULL;     printf("@section Generic format AVOptions\n");    show_opts(avformat_get_class());     printf("@section Format-specific AVOptions\n");    while ((iformat = av_demuxer_iterate(&iformat_opaque))) {        if (!iformat->priv_class)            continue;        printf("@subsection %s AVOptions\n", iformat->priv_class->class_name);        show_opts(iformat->priv_class);    }    while ((oformat = av_muxer_iterate(&oformat_opaque))) {        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();     if (!strcmp(argv[1], "format"))        show_format_opts();    else if (!strcmp(argv[1], "codec"))        show_codec_opts();    else        print_usage();     return 0;}