aboutsummaryrefslogtreecommitdiffstats
path: root/tools/enum_options.c
blob: bedebd4c67dd1ea52c5a13cfbf6441dd4af9fbeb (plain) (blame)
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
144
/*
 * 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 AV_OPT_TYPE_BINARY:   printf("hexadecimal string"); break;
    case AV_OPT_TYPE_STRING:   printf("string");             break;
    case AV_OPT_TYPE_INT:
    case AV_OPT_TYPE_INT64:    printf("integer");            break;
    case AV_OPT_TYPE_FLOAT:
    case AV_OPT_TYPE_DOUBLE:   printf("float");              break;
    case AV_OPT_TYPE_RATIONAL: printf("rational number");    break;
    case AV_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_opt_next(&class, u)))
            if (u->type == AV_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_opt_next(&class, o)))
        if (o->type != AV_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)
{
    void *iter = NULL;
    const AVCodec *c;

    printf("@section Generic codec AVOptions\n");
    show_opts(avcodec_get_class());

    printf("@section Codec-specific AVOptions\n");
    while ((c = av_codec_iterate(&iter))) {
        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;
}