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 "avdevice.h"
  28 #include "cmdutils.h"
  29 #include "avstring.h"
  30 #include "version.h"
  31 #include "config.h"
  32
  33 #undef exit
  34
  35
  36 double parse_number_or_die(const char *context, const char *numstr, int type, double min, double max)
  37 {
  38     char *tail;
  39     const char *error;
  40     double d = strtod(numstr, &tail);
  41     if (*tail)
  42         error= "Expected number for %s but found: %s\n";
  43     else if (d < min || d > max)
  44         error= "The value for %s was %s which is not within %f - %f\n";
  45     else if(type == OPT_INT64 && (int64_t)d != d)
  46         error= "Expected int64 for %s but found %s\n";
  47     else
  48         return d;
  49     fprintf(stderr, error, context, numstr, min, max);
  50     exit(1);
  51 }
  52
  53 void show_help_options(const OptionDef *options, const char *msg, int mask, int value)
  54 {
  55     const OptionDef *po;
  56     int first;
  57
  58     first = 1;
  59     for(po = options; po->name != NULL; po++) {
  60         char buf[64];
  61         if ((po->flags & mask) == value) {
  62             if (first) {
  63                 printf("%s", msg);
  64                 first = 0;
  65             }
  66             av_strlcpy(buf, po->name, sizeof(buf));
  67             if (po->flags & HAS_ARG) {
  68                 av_strlcat(buf, " ", sizeof(buf));
  69                 av_strlcat(buf, po->argname, sizeof(buf));
  70             }
  71             printf("-%-17s  %s\n", buf, po->help);
  72         }
  73     }
  74 }
  75
  76 static const OptionDef* find_option(const OptionDef *po, const char *name){
  77     while (po->name != NULL) {
  78         if (!strcmp(name, po->name))
  79             break;
  80         po++;
  81     }
  82     return po;
  83 }
  84
  85 void parse_options(int argc, char **argv, const OptionDef *options,
  86                    void (* parse_arg_function)(const char*))
  87 {
  88     const char *opt, *arg;
  89     int optindex, handleoptions=1;
  90     const OptionDef *po;
  91
  92     /* parse options */
  93     optindex = 1;
  94     while (optindex < argc) {
  95         opt = argv[optindex++];
  96
  97         if (handleoptions && opt[0] == '-' && opt[1] != '\0') {
  98           if (opt[1] == '-' && opt[2] == '\0') {
  99             handleoptions = 0;
 100             continue;
 101           }
 102             po= find_option(options, opt + 1);
 103             if (!po->name)
 104                 po= find_option(options, "default");
 105             if (!po->name) {
 106 unknown_opt:
 107                 fprintf(stderr, "%s: unrecognized option '%s'\n", argv[0], opt);
 108                 exit(1);
 109             }
 110             arg = NULL;
 111             if (po->flags & HAS_ARG) {
 112                 arg = argv[optindex++];
 113                 if (!arg) {
 114                     fprintf(stderr, "%s: missing argument for option '%s'\n", argv[0], opt);
 115                     exit(1);
 116                 }
 117             }
 118             if (po->flags & OPT_STRING) {
 119                 char *str;
 120                 str = av_strdup(arg);
 121                 *po->u.str_arg = str;
 122             } else if (po->flags & OPT_BOOL) {
 123                 *po->u.int_arg = 1;
 124             } else if (po->flags & OPT_INT) {
 125                 *po->u.int_arg = atoi(arg);
 126             } else if (po->flags & OPT_INT64) {
 127                 *po->u.int64_arg = strtoll(arg, (char **)NULL, 10);
 128             } else if (po->flags & OPT_FLOAT) {
 129                 *po->u.float_arg = atof(arg);
 130             } else if (po->flags & OPT_FUNC2) {
 131                 if(po->u.func2_arg(opt+1, arg)<0)
 132                     goto unknown_opt;
 133             } else {
 134                 po->u.func_arg(arg);
 135             }
 136         } else {
 137             if (parse_arg_function)
 138                 parse_arg_function(opt);
 139         }
 140     }
 141 }
 142
 143 void print_error(const char *filename, int err)
 144 {
 145     switch(err) {
 146     case AVERROR_NUMEXPECTED:
 147         fprintf(stderr, "%s: Incorrect image filename syntax.\n"
 148                 "Use '%%d' to specify the image number:\n"
 149                 "  for img1.jpg, img2.jpg, ..., use 'img%%d.jpg';\n"
 150                 "  for img001.jpg, img002.jpg, ..., use 'img%%03d.jpg'.\n",
 151                 filename);
 152         break;
 153     case AVERROR_INVALIDDATA:
 154         fprintf(stderr, "%s: Error while parsing header\n", filename);
 155         break;
 156     case AVERROR_NOFMT:
 157         fprintf(stderr, "%s: Unknown format\n", filename);
 158         break;
 159     case AVERROR(EIO):
 160         fprintf(stderr, "%s: I/O error occured\n"
 161                 "Usually that means that input file is truncated and/or corrupted.\n",
 162                 filename);
 163         break;
 164     case AVERROR(ENOMEM):
 165         fprintf(stderr, "%s: memory allocation error occured\n", filename);
 166         break;
 167     case AVERROR(ENOENT):
 168         fprintf(stderr, "%s: no such file or directory\n", filename);
 169         break;
 170     default:
 171         fprintf(stderr, "%s: Error while opening file\n", filename);
 172         break;
 173     }
 174 }
 175
 176 void show_banner(const char *program_name, int program_birth_year)
 177 {
 178     fprintf(stderr, "%s version " FFMPEG_VERSION ", Copyright (c) %d-2008 Fabrice Bellard, et al.\n",
 179             program_name, program_birth_year);
 180     fprintf(stderr, "  configuration: " FFMPEG_CONFIGURATION "\n");
 181     fprintf(stderr, "  libavutil version: " AV_STRINGIFY(LIBAVUTIL_VERSION) "\n");
 182     fprintf(stderr, "  libavcodec version: " AV_STRINGIFY(LIBAVCODEC_VERSION) "\n");
 183     fprintf(stderr, "  libavformat version: " AV_STRINGIFY(LIBAVFORMAT_VERSION) "\n");
 184     fprintf(stderr, "  libavdevice version: " AV_STRINGIFY(LIBAVDEVICE_VERSION) "\n");
 185     fprintf(stderr, "  built on " __DATE__ " " __TIME__);
 186 #ifdef __GNUC__
 187     fprintf(stderr, ", gcc: " __VERSION__ "\n");
 188 #else
 189     fprintf(stderr, ", using a non-gcc compiler\n");
 190 #endif
 191 }
 192
 193 void show_version(const char *program_name) {
 194      /* TODO: add function interface to avutil and avformat avdevice*/
 195     printf("%s " FFMPEG_VERSION "\n", program_name);
 196     printf("libavutil   %d\n"
 197            "libavcodec  %d\n"
 198            "libavformat %d\n"
 199            "libavdevice %d\n",
 200            LIBAVUTIL_BUILD, avcodec_build(), LIBAVFORMAT_BUILD, LIBAVDEVICE_BUILD);
 201 }
 202
 203 void show_license(void)
 204 {
 205 #ifdef CONFIG_NONFREE
 206     printf(
 207     "This version of FFmpeg has nonfree parts compiled in.\n"
 208     "Therefore it is not legally redistributable.\n"
 209     );
 210 #elif CONFIG_GPL
 211     printf(
 212     "FFmpeg is free software; you can redistribute it and/or modify\n"
 213     "it under the terms of the GNU General Public License as published by\n"
 214     "the Free Software Foundation; either version 2 of the License, or\n"
 215     "(at your option) any later version.\n"
 216     "\n"
 217     "FFmpeg is distributed in the hope that it will be useful,\n"
 218     "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
 219     "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n"
 220     "GNU General Public License for more details.\n"
 221     "\n"
 222     "You should have received a copy of the GNU General Public License\n"
 223     "along with FFmpeg; if not, write to the Free Software\n"
 224     "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n"
 225     );
 226 #else
 227     printf(
 228     "FFmpeg is free software; you can redistribute it and/or\n"
 229     "modify it under the terms of the GNU Lesser General Public\n"
 230     "License as published by the Free Software Foundation; either\n"
 231     "version 2.1 of the License, or (at your option) any later version.\n"
 232     "\n"
 233     "FFmpeg is distributed in the hope that it will be useful,\n"
 234     "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
 235     "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU\n"
 236     "Lesser General Public License for more details.\n"
 237     "\n"
 238     "You should have received a copy of the GNU Lesser General Public\n"
 239     "License along with FFmpeg; if not, write to the Free Software\n"
 240     "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n"
 241     );
 242 #endif
 243 }