cmdutils.c

   1 /*
   2  * Various utilities for command line tools
   3  * Copyright (c) 2000-2003 Fabrice Bellard
   4  *
   5  * This file is part of FFmpeg.
   6  *
   7  * FFmpeg is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * FFmpeg is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with FFmpeg; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21 #define HAVE_AV_CONFIG_H
  22 #include "avformat.h"
  23 #include "common.h"
  24
  25 #include "cmdutils.h"
  26
  27 #undef exit
  28
  29 void show_help_options(const OptionDef *options, const char *msg, int mask, int value)
  30 {
  31     const OptionDef *po;
  32     int first;
  33
  34     first = 1;
  35     for(po = options; po->name != NULL; po++) {
  36         char buf[64];
  37         if ((po->flags & mask) == value) {
  38             if (first) {
  39                 printf("%s", msg);
  40                 first = 0;
  41             }
  42             pstrcpy(buf, sizeof(buf), po->name);
  43             if (po->flags & HAS_ARG) {
  44                 pstrcat(buf, sizeof(buf), " ");
  45                 pstrcat(buf, sizeof(buf), po->argname);
  46             }
  47             printf("-%-17s  %s\n", buf, po->help);
  48         }
  49     }
  50 }
  51
  52 static const OptionDef* find_option(const OptionDef *po, const char *name){
  53     while (po->name != NULL) {
  54         if (!strcmp(name, po->name))
  55             break;
  56         po++;
  57     }
  58     return po;
  59 }
  60
  61 void parse_options(int argc, char **argv, const OptionDef *options)
  62 {
  63     const char *opt, *arg;
  64     int optindex, handleoptions=1;
  65     const OptionDef *po;
  66
  67     /* parse options */
  68     optindex = 1;
  69     while (optindex < argc) {
  70         opt = argv[optindex++];
  71
  72         if (handleoptions && opt[0] == '-' && opt[1] != '\0') {
  73           if (opt[1] == '-' && opt[2] == '\0') {
  74             handleoptions = 0;
  75             continue;
  76           }
  77             po= find_option(options, opt + 1);
  78             if (!po->name)
  79                 po= find_option(options, "default");
  80             if (!po->name) {
  81 unknown_opt:
  82                 fprintf(stderr, "%s: unrecognized option '%s'\n", argv[0], opt);
  83                 exit(1);
  84             }
  85             arg = NULL;
  86             if (po->flags & HAS_ARG) {
  87                 arg = argv[optindex++];
  88                 if (!arg) {
  89                     fprintf(stderr, "%s: missing argument for option '%s'\n", argv[0], opt);
  90                     exit(1);
  91                 }
  92             }
  93             if (po->flags & OPT_STRING) {
  94                 char *str;
  95                 str = av_strdup(arg);
  96                 *po->u.str_arg = str;
  97             } else if (po->flags & OPT_BOOL) {
  98                 *po->u.int_arg = 1;
  99             } else if (po->flags & OPT_INT) {
 100                 *po->u.int_arg = atoi(arg);
 101             } else if (po->flags & OPT_INT64) {
 102                 *po->u.int64_arg = strtoll(arg, (char **)NULL, 10);
 103             } else if (po->flags & OPT_FLOAT) {
 104                 *po->u.float_arg = atof(arg);
 105             } else if (po->flags & OPT_FUNC2) {
 106                 if(po->u.func2_arg(opt+1, arg)<0)
 107                     goto unknown_opt;
 108             } else {
 109                 po->u.func_arg(arg);
 110             }
 111         } else {
 112             parse_arg_file(opt);
 113         }
 114     }
 115 }
 116
 117 void print_error(const char *filename, int err)
 118 {
 119     switch(err) {
 120     case AVERROR_NUMEXPECTED:
 121         fprintf(stderr, "%s: Incorrect image filename syntax.\n"
 122                 "Use '%%d' to specify the image number:\n"
 123                 "  for img1.jpg, img2.jpg, ..., use 'img%%d.jpg';\n"
 124                 "  for img001.jpg, img002.jpg, ..., use 'img%%03d.jpg'.\n",
 125                 filename);
 126         break;
 127     case AVERROR_INVALIDDATA:
 128         fprintf(stderr, "%s: Error while parsing header\n", filename);
 129         break;
 130     case AVERROR_NOFMT:
 131         fprintf(stderr, "%s: Unknown format\n", filename);
 132         break;
 133     case AVERROR_IO:
 134         fprintf(stderr, "%s: I/O error occured\n"
 135                 "Usually that means that input file is truncated and/or corrupted.\n",
 136                 filename);
 137         break;
 138     case AVERROR_NOMEM:
 139         fprintf(stderr, "%s: memory allocation error occured\n", filename);
 140         break;
 141     default:
 142         fprintf(stderr, "%s: Error while opening file\n", filename);
 143         break;
 144     }
 145 }