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  1. /*
  2.  * Copyright (c) 2011 Anton Khirnov
  3.  *
  4.  * This file is part of FFmpeg.
  5.  *
  6.  * FFmpeg is free software; you can redistribute it and/or
  7.  * modify it under the terms of the GNU Lesser General Public
  8.  * License as published by the Free Software Foundation; either
  9.  * version 2.1 of the License, or (at your option) any later version.
  10.  *
  11.  * FFmpeg is distributed in the hope that it will be useful,
  12.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14.  * Lesser General Public License for more details.
  15.  *
  16.  * You should have received a copy of the GNU Lesser General Public
  17.  * License along with FFmpeg; if not, write to the Free Software
  18.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19.  */
  20.  
  21. /*
  22.  * enumerate avoptions and format them in texinfo format
  23.  */
  24.  
  25. #include <string.h>
  26.  
  27. #include "libavformat/avformat.h"
  28. #include "libavcodec/avcodec.h"
  29. #include "libavutil/log.h"
  30. #include "libavutil/opt.h"
  31.  
  32. static void print_usage(void)
  33. {
  34.     fprintf(stderr, "Usage: enum_options type\n"
  35.             "type: format codec\n");
  36.     exit(1);
  37. }
  38.  
  39. static void print_option(const AVClass *class, const AVOption *o)
  40. {
  41.     printf("@item -%s @var{", o->name);
  42.     switch (o->type) {
  43.     case FF_OPT_TYPE_BINARY:   printf("hexadecimal string"); break;
  44.     case FF_OPT_TYPE_STRING:   printf("string");             break;
  45.     case FF_OPT_TYPE_INT:
  46.     case FF_OPT_TYPE_INT64:    printf("integer");            break;
  47.     case FF_OPT_TYPE_FLOAT:
  48.     case FF_OPT_TYPE_DOUBLE:   printf("float");              break;
  49.     case FF_OPT_TYPE_RATIONAL: printf("rational number");    break;
  50.     case FF_OPT_TYPE_FLAGS:    printf("flags");              break;
  51.     default:                   printf("value");              break;
  52.     }
  53.     printf("} (@emph{");
  54.  
  55.     if (o->flags & AV_OPT_FLAG_ENCODING_PARAM) {
  56.         printf("input");
  57.         if (o->flags & AV_OPT_FLAG_ENCODING_PARAM)
  58.             printf("/");
  59.     }
  60.     if (o->flags & AV_OPT_FLAG_ENCODING_PARAM)
  61.         printf("output");
  62.  
  63.     printf("})\n");
  64.     if (o->help)
  65.         printf("%s\n", o->help);
  66.  
  67.     if (o->unit) {
  68.         const AVOption *u = NULL;
  69.         printf("\nPossible values:\n@table @samp\n");
  70.  
  71.         while ((u = av_next_option(&class, u)))
  72.             if (u->type == FF_OPT_TYPE_CONST && u->unit && !strcmp(u->unit, o->unit))
  73.                 printf("@item %s\n%s\n", u->name, u->help ? u->help : "");
  74.         printf("@end table\n");
  75.     }
  76. }
  77.  
  78. static void show_opts(const AVClass *class)
  79. {
  80.     const AVOption *o = NULL;
  81.  
  82.     printf("@table @option\n");
  83.     while ((o = av_next_option(&class, o)))
  84.         if (o->type != FF_OPT_TYPE_CONST)
  85.             print_option(class, o);
  86.     printf("@end table\n");
  87. }
  88.  
  89. static void show_format_opts(void)
  90. {
  91.     AVInputFormat *iformat = NULL;
  92.     AVOutputFormat *oformat = NULL;
  93.  
  94.     printf("@section Generic format AVOptions\n");
  95.     show_opts(avformat_get_class());
  96.  
  97.     printf("@section Format-specific AVOptions\n");
  98.     while ((iformat = av_iformat_next(iformat))) {
  99.         if (!iformat->priv_class)
  100.             continue;
  101.         printf("@subsection %s AVOptions\n", iformat->priv_class->class_name);
  102.         show_opts(iformat->priv_class);
  103.     }
  104.     while ((oformat = av_oformat_next(oformat))) {
  105.         if (!oformat->priv_class)
  106.             continue;
  107.         printf("@subsection %s AVOptions\n", oformat->priv_class->class_name);
  108.         show_opts(oformat->priv_class);
  109.     }
  110. }
  111.  
  112. static void show_codec_opts(void)
  113. {
  114.     AVCodec *c = NULL;
  115.  
  116.     printf("@section Generic codec AVOptions\n");
  117.     show_opts(avcodec_get_class());
  118.  
  119.     printf("@section Codec-specific AVOptions\n");
  120.     while ((c = av_codec_next(c))) {
  121.         if (!c->priv_class)
  122.             continue;
  123.         printf("@subsection %s AVOptions\n", c->priv_class->class_name);
  124.         show_opts(c->priv_class);
  125.     }
  126. }
  127.  
  128. int main(int argc, char **argv)
  129. {
  130.     if (argc < 2)
  131.         print_usage();
  132.  
  133.     av_register_all();
  134.  
  135.     if (!strcmp(argv[1], "format"))
  136.         show_format_opts();
  137.     else if (!strcmp(argv[1], "codec"))
  138.         show_codec_opts();
  139.     else
  140.         print_usage();
  141.  
  142.     return 0;
  143. }
  144.