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
  22 #include <string.h>
  23 #include <stdlib.h>
  24 #include <errno.h>
  25
  26 #include "avformat.h"
  27 #include "cmdutils.h"
  28 #include "avstring.h"
  29
  30 #undef exit
  31
  32 void show_help_options(const OptionDef *options, const char *msg, int mask, int value)
  33 {
  34     const OptionDef *po;
  35     int first;
  36
  37     first = 1;
  38     for(po = options; po->name != NULL; po++) {
  39         char buf[64];
  40         if ((po->flags & mask) == value) {
  41             if (first) {
  42                 printf("%s", msg);
  43                 first = 0;
  44             }
  45             av_strlcpy(buf, po->name, sizeof(buf));
  46             if (po->flags & HAS_ARG) {
  47                 av_strlcat(buf, " ", sizeof(buf));
  48                 av_strlcat(buf, po->argname, sizeof(buf));
  49             }
  50             printf("-%-17s  %s\n", buf, po->help);
  51         }
  52     }
  53 }
  54
  55 static const OptionDef* find_option(const OptionDef *po, const char *name){
  56     while (po->name != NULL) {
  57         if (!strcmp(name, po->name))
  58             break;
  59         po++;
  60     }
  61     return po;
  62 }
  63
  64 void parse_options(int argc, char **argv, const OptionDef *options,
  65                    void (* parse_arg_function)(const char*))
  66 {
  67     const char *opt, *arg;
  68     int optindex, handleoptions=1;
  69     const OptionDef *po;
  70
  71     /* parse options */
  72     optindex = 1;
  73     while (optindex < argc) {
  74         opt = argv[optindex++];
  75
  76         if (handleoptions && opt[0] == '-' && opt[1] != '\0') {
  77           if (opt[1] == '-' && opt[2] == '\0') {
  78             handleoptions = 0;
  79             continue;
  80           }
  81             po= find_option(options, opt + 1);
  82             if (!po->name)
  83                 po= find_option(options, "default");
  84             if (!po->name) {
  85 unknown_opt:
  86                 fprintf(stderr, "%s: unrecognized option '%s'\n", argv[0], opt);
  87                 exit(1);
  88             }
  89             arg = NULL;
  90             if (po->flags & HAS_ARG) {
  91                 arg = argv[optindex++];
  92                 if (!arg) {
  93                     fprintf(stderr, "%s: missing argument for option '%s'\n", argv[0], opt);
  94                     exit(1);
  95                 }
  96             }
  97             if (po->flags & OPT_STRING) {
  98                 char *str;
  99                 str = av_strdup(arg);
 100                 *po->u.str_arg = str;
 101             } else if (po->flags & OPT_BOOL) {
 102                 *po->u.int_arg = 1;
 103             } else if (po->flags & OPT_INT) {
 104                 *po->u.int_arg = atoi(arg);
 105             } else if (po->flags & OPT_INT64) {
 106                 *po->u.int64_arg = strtoll(arg, (char **)NULL, 10);
 107             } else if (po->flags & OPT_FLOAT) {
 108                 *po->u.float_arg = atof(arg);
 109             } else if (po->flags & OPT_FUNC2) {
 110                 if(po->u.func2_arg(opt+1, arg)<0)
 111                     goto unknown_opt;
 112             } else {
 113                 po->u.func_arg(arg);
 114             }
 115         } else {
 116             if (parse_arg_function)
 117                 parse_arg_function(opt);
 118         }
 119     }
 120 }
 121
 122 void print_error(const char *filename, int err)
 123 {
 124     switch(err) {
 125     case AVERROR_NUMEXPECTED:
 126         fprintf(stderr, "%s: Incorrect image filename syntax.\n"
 127                 "Use '%%d' to specify the image number:\n"
 128                 "  for img1.jpg, img2.jpg, ..., use 'img%%d.jpg';\n"
 129                 "  for img001.jpg, img002.jpg, ..., use 'img%%03d.jpg'.\n",
 130                 filename);
 131         break;
 132     case AVERROR_INVALIDDATA:
 133         fprintf(stderr, "%s: Error while parsing header\n", filename);
 134         break;
 135     case AVERROR_NOFMT:
 136         fprintf(stderr, "%s: Unknown format\n", filename);
 137         break;
 138     case AVERROR(EIO):
 139         fprintf(stderr, "%s: I/O error occured\n"
 140                 "Usually that means that input file is truncated and/or corrupted.\n",
 141                 filename);
 142         break;
 143     case AVERROR(ENOMEM):
 144         fprintf(stderr, "%s: memory allocation error occured\n", filename);
 145         break;
 146     case AVERROR(ENOENT):
 147         fprintf(stderr, "%s: no such file or directory\n", filename);
 148         break;
 149     default:
 150         fprintf(stderr, "%s: Error while opening file\n", filename);
 151         break;
 152     }
 153 }
 154
 155 void show_license(void)
 156 {
 157 #ifdef CONFIG_GPL
 158     printf(
 159     "FFmpeg is free software; you can redistribute it and/or modify\n"
 160     "it under the terms of the GNU General Public License as published by\n"
 161     "the Free Software Foundation; either version 2 of the License, or\n"
 162     "(at your option) any later version.\n"
 163     "\n"
 164     "FFmpeg is distributed in the hope that it will be useful,\n"
 165     "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
 166     "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n"
 167     "GNU General Public License for more details.\n"
 168     "\n"
 169     "You should have received a copy of the GNU General Public License\n"
 170     "along with FFmpeg; if not, write to the Free Software\n"
 171     "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n"
 172     );
 173 #else
 174     printf(
 175     "FFmpeg is free software; you can redistribute it and/or\n"
 176     "modify it under the terms of the GNU Lesser General Public\n"
 177     "License as published by the Free Software Foundation; either\n"
 178     "version 2.1 of the License, or (at your option) any later version.\n"
 179     "\n"
 180     "FFmpeg is distributed in the hope that it will be useful,\n"
 181     "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
 182     "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU\n"
 183     "Lesser General Public License for more details.\n"
 184     "\n"
 185     "You should have received a copy of the GNU Lesser General Public\n"
 186     "License along with FFmpeg; if not, write to the Free Software\n"
 187     "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n"
 188     );
 189 #endif
 190 }