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 #include <math.h>
  26
  27 #include "avformat.h"
  28 #include "avdevice.h"
  29 #include "cmdutils.h"
  30 #include "avstring.h"
  31 #include "version.h"
  32 #include "config.h"
  33
  34 #undef exit
  35
  36
  37 double parse_number_or_die(const char *context, const char *numstr, int type, double min, double max)
  38 {
  39     char *tail;
  40     const char *error;
  41     double d = strtod(numstr, &tail);
  42     if (*tail)
  43         error= "Expected number for %s but found: %s\n";
  44     else if (d < min || d > max)
  45         error= "The value for %s was %s which is not within %f - %f\n";
  46     else if(type == OPT_INT64 && (int64_t)d != d)
  47         error= "Expected int64 for %s but found %s\n";
  48     else
  49         return d;
  50     fprintf(stderr, error, context, numstr, min, max);
  51     exit(1);
  52 }
  53
  54 void show_help_options(const OptionDef *options, const char *msg, int mask, int value)
  55 {
  56     const OptionDef *po;
  57     int first;
  58
  59     first = 1;
  60     for(po = options; po->name != NULL; po++) {
  61         char buf[64];
  62         if ((po->flags & mask) == value) {
  63             if (first) {
  64                 printf("%s", msg);
  65                 first = 0;
  66             }
  67             av_strlcpy(buf, po->name, sizeof(buf));
  68             if (po->flags & HAS_ARG) {
  69                 av_strlcat(buf, " ", sizeof(buf));
  70                 av_strlcat(buf, po->argname, sizeof(buf));
  71             }
  72             printf("-%-17s  %s\n", buf, po->help);
  73         }
  74     }
  75 }
  76
  77 static const OptionDef* find_option(const OptionDef *po, const char *name){
  78     while (po->name != NULL) {
  79         if (!strcmp(name, po->name))
  80             break;
  81         po++;
  82     }
  83     return po;
  84 }
  85
  86 void parse_options(int argc, char **argv, const OptionDef *options,
  87                    void (* parse_arg_function)(const char*))
  88 {
  89     const char *opt, *arg;
  90     int optindex, handleoptions=1;
  91     const OptionDef *po;
  92
  93     /* parse options */
  94     optindex = 1;
  95     while (optindex < argc) {
  96         opt = argv[optindex++];
  97
  98         if (handleoptions && opt[0] == '-' && opt[1] != '\0') {
  99           if (opt[1] == '-' && opt[2] == '\0') {
 100             handleoptions = 0;
 101             continue;
 102           }
 103             po= find_option(options, opt + 1);
 104             if (!po->name)
 105                 po= find_option(options, "default");
 106             if (!po->name) {
 107 unknown_opt:
 108                 fprintf(stderr, "%s: unrecognized option '%s'\n", argv[0], opt);
 109                 exit(1);
 110             }
 111             arg = NULL;
 112             if (po->flags & HAS_ARG) {
 113                 arg = argv[optindex++];
 114                 if (!arg) {
 115                     fprintf(stderr, "%s: missing argument for option '%s'\n", argv[0], opt);
 116                     exit(1);
 117                 }
 118             }
 119             if (po->flags & OPT_STRING) {
 120                 char *str;
 121                 str = av_strdup(arg);
 122                 *po->u.str_arg = str;
 123             } else if (po->flags & OPT_BOOL) {
 124                 *po->u.int_arg = 1;
 125             } else if (po->flags & OPT_INT) {
 126                 *po->u.int_arg = parse_number_or_die(opt+1, arg, OPT_INT64, INT_MIN, INT_MAX);
 127             } else if (po->flags & OPT_INT64) {
 128                 *po->u.int64_arg = parse_number_or_die(opt+1, arg, OPT_INT64, INT64_MIN, INT64_MAX);
 129             } else if (po->flags & OPT_FLOAT) {
 130                 *po->u.float_arg = parse_number_or_die(opt+1, arg, OPT_FLOAT, -INFINITY, INFINITY);
 131             } else if (po->flags & OPT_FUNC2) {
 132                 if(po->u.func2_arg(opt+1, arg)<0)
 133                     goto unknown_opt;
 134             } else {
 135                 po->u.func_arg(arg);
 136             }
 137         } else {
 138             if (parse_arg_function)
 139                 parse_arg_function(opt);
 140         }
 141     }
 142 }
 143
 144 void print_error(const char *filename, int err)
 145 {
 146     switch(err) {
 147     case AVERROR_NUMEXPECTED:
 148         fprintf(stderr, "%s: Incorrect image filename syntax.\n"
 149                 "Use '%%d' to specify the image number:\n"
 150                 "  for img1.jpg, img2.jpg, ..., use 'img%%d.jpg';\n"
 151                 "  for img001.jpg, img002.jpg, ..., use 'img%%03d.jpg'.\n",
 152                 filename);
 153         break;
 154     case AVERROR_INVALIDDATA:
 155         fprintf(stderr, "%s: Error while parsing header\n", filename);
 156         break;
 157     case AVERROR_NOFMT:
 158         fprintf(stderr, "%s: Unknown format\n", filename);
 159         break;
 160     case AVERROR(EIO):
 161         fprintf(stderr, "%s: I/O error occured\n"
 162                 "Usually that means that input file is truncated and/or corrupted.\n",
 163                 filename);
 164         break;
 165     case AVERROR(ENOMEM):
 166         fprintf(stderr, "%s: memory allocation error occured\n", filename);
 167         break;
 168     case AVERROR(ENOENT):
 169         fprintf(stderr, "%s: no such file or directory\n", filename);
 170         break;
 171     default:
 172         fprintf(stderr, "%s: Error while opening file\n", filename);
 173         break;
 174     }
 175 }
 176
 177 void show_banner(const char *program_name, int program_birth_year)
 178 {
 179     fprintf(stderr, "%s version " FFMPEG_VERSION ", Copyright (c) %d-2008 Fabrice Bellard, et al.\n",
 180             program_name, program_birth_year);
 181     fprintf(stderr, "  configuration: " FFMPEG_CONFIGURATION "\n");
 182     fprintf(stderr, "  libavutil version: " AV_STRINGIFY(LIBAVUTIL_VERSION) "\n");
 183     fprintf(stderr, "  libavcodec version: " AV_STRINGIFY(LIBAVCODEC_VERSION) "\n");
 184     fprintf(stderr, "  libavformat version: " AV_STRINGIFY(LIBAVFORMAT_VERSION) "\n");
 185     fprintf(stderr, "  libavdevice version: " AV_STRINGIFY(LIBAVDEVICE_VERSION) "\n");
 186     fprintf(stderr, "  built on " __DATE__ " " __TIME__);
 187 #ifdef __GNUC__
 188     fprintf(stderr, ", gcc: " __VERSION__ "\n");
 189 #else
 190     fprintf(stderr, ", using a non-gcc compiler\n");
 191 #endif
 192 }
 193
 194 void show_version(const char *program_name) {
 195      /* TODO: add function interface to avutil and avformat avdevice*/
 196     printf("%s " FFMPEG_VERSION "\n", program_name);
 197     printf("libavutil   %d\n"
 198            "libavcodec  %d\n"
 199            "libavformat %d\n"
 200            "libavdevice %d\n",
 201            LIBAVUTIL_BUILD, avcodec_build(), LIBAVFORMAT_BUILD, LIBAVDEVICE_BUILD);
 202 }
 203
 204 void show_license(void)
 205 {
 206 #ifdef CONFIG_NONFREE
 207     printf(
 208     "This version of FFmpeg has nonfree parts compiled in.\n"
 209     "Therefore it is not legally redistributable.\n"
 210     );
 211 #elif CONFIG_GPL
 212     printf(
 213     "FFmpeg is free software; you can redistribute it and/or modify\n"
 214     "it under the terms of the GNU General Public License as published by\n"
 215     "the Free Software Foundation; either version 2 of the License, or\n"
 216     "(at your option) any later version.\n"
 217     "\n"
 218     "FFmpeg is distributed in the hope that it will be useful,\n"
 219     "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
 220     "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n"
 221     "GNU General Public License for more details.\n"
 222     "\n"
 223     "You should have received a copy of the GNU General Public License\n"
 224     "along with FFmpeg; if not, write to the Free Software\n"
 225     "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n"
 226     );
 227 #else
 228     printf(
 229     "FFmpeg is free software; you can redistribute it and/or\n"
 230     "modify it under the terms of the GNU Lesser General Public\n"
 231     "License as published by the Free Software Foundation; either\n"
 232     "version 2.1 of the License, or (at your option) any later version.\n"
 233     "\n"
 234     "FFmpeg is distributed in the hope that it will be useful,\n"
 235     "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
 236     "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU\n"
 237     "Lesser General Public License for more details.\n"
 238     "\n"
 239     "You should have received a copy of the GNU Lesser General Public\n"
 240     "License along with FFmpeg; if not, write to the Free Software\n"
 241     "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n"
 242     );
 243 #endif
 244 }