enum_options.c 4.05 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143
/*
 * 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;
}