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 "config.h"
  28 #include "avformat.h"
  29 #include "avfilter.h"
  30 #include "avdevice.h"
  31 #include "cmdutils.h"
  32 #include "avstring.h"
  33 #include "version.h"
  34
  35 #undef exit
  36
  37
  38 double parse_number_or_die(const char *context, const char *numstr, int type, double min, double max)
  39 {
  40     char *tail;
  41     const char *error;
  42     double d = strtod(numstr, &tail);
  43     if (*tail)
  44         error= "Expected number for %s but found: %s\n";
  45     else if (d < min || d > max)
  46         error= "The value for %s was %s which is not within %f - %f\n";
  47     else if(type == OPT_INT64 && (int64_t)d != d)
  48         error= "Expected int64 for %s but found %s\n";
  49     else
  50         return d;
  51     fprintf(stderr, error, context, numstr, min, max);
  52     exit(1);
  53 }
  54
  55 void show_help_options(const OptionDef *options, const char *msg, int mask, int value)
  56 {
  57     const OptionDef *po;
  58     int first;
  59
  60     first = 1;
  61     for(po = options; po->name != NULL; po++) {
  62         char buf[64];
  63         if ((po->flags & mask) == value) {
  64             if (first) {
  65                 printf("%s", msg);
  66                 first = 0;
  67             }
  68             av_strlcpy(buf, po->name, sizeof(buf));
  69             if (po->flags & HAS_ARG) {
  70                 av_strlcat(buf, " ", sizeof(buf));
  71                 av_strlcat(buf, po->argname, sizeof(buf));
  72             }
  73             printf("-%-17s  %s\n", buf, po->help);
  74         }
  75     }
  76 }
  77
  78 static const OptionDef* find_option(const OptionDef *po, const char *name){
  79     while (po->name != NULL) {
  80         if (!strcmp(name, po->name))
  81             break;
  82         po++;
  83     }
  84     return po;
  85 }
  86
  87 void parse_options(int argc, char **argv, const OptionDef *options,
  88                    void (* parse_arg_function)(const char*))
  89 {
  90     const char *opt, *arg;
  91     int optindex, handleoptions=1;
  92     const OptionDef *po;
  93
  94     /* parse options */
  95     optindex = 1;
  96     while (optindex < argc) {
  97         opt = argv[optindex++];
  98
  99         if (handleoptions && opt[0] == '-' && opt[1] != '\0') {
 100           if (opt[1] == '-' && opt[2] == '\0') {
 101             handleoptions = 0;
 102             continue;
 103           }
 104             po= find_option(options, opt + 1);
 105             if (!po->name)
 106                 po= find_option(options, "default");
 107             if (!po->name) {
 108 unknown_opt:
 109                 fprintf(stderr, "%s: unrecognized option '%s'\n", argv[0], opt);
 110                 exit(1);
 111             }
 112             arg = NULL;
 113             if (po->flags & HAS_ARG) {
 114                 arg = argv[optindex++];
 115                 if (!arg) {
 116                     fprintf(stderr, "%s: missing argument for option '%s'\n", argv[0], opt);
 117                     exit(1);
 118                 }
 119             }
 120             if (po->flags & OPT_STRING) {
 121                 char *str;
 122                 str = av_strdup(arg);
 123                 *po->u.str_arg = str;
 124             } else if (po->flags & OPT_BOOL) {
 125                 *po->u.int_arg = 1;
 126             } else if (po->flags & OPT_INT) {
 127                 *po->u.int_arg = parse_number_or_die(opt+1, arg, OPT_INT64, INT_MIN, INT_MAX);
 128             } else if (po->flags & OPT_INT64) {
 129                 *po->u.int64_arg = parse_number_or_die(opt+1, arg, OPT_INT64, INT64_MIN, INT64_MAX);
 130             } else if (po->flags & OPT_FLOAT) {
 131                 *po->u.float_arg = parse_number_or_die(opt+1, arg, OPT_FLOAT, -1.0/0.0, 1.0/0.0);
 132             } else if (po->flags & OPT_FUNC2) {
 133                 if(po->u.func2_arg(opt+1, arg)<0)
 134                     goto unknown_opt;
 135             } else {
 136                 po->u.func_arg(arg);
 137             }
 138         } else {
 139             if (parse_arg_function)
 140                 parse_arg_function(opt);
 141         }
 142     }
 143 }
 144
 145 void print_error(const char *filename, int err)
 146 {
 147     switch(err) {
 148     case AVERROR_NUMEXPECTED:
 149         fprintf(stderr, "%s: Incorrect image filename syntax.\n"
 150                 "Use '%%d' to specify the image number:\n"
 151                 "  for img1.jpg, img2.jpg, ..., use 'img%%d.jpg';\n"
 152                 "  for img001.jpg, img002.jpg, ..., use 'img%%03d.jpg'.\n",
 153                 filename);
 154         break;
 155     case AVERROR_INVALIDDATA:
 156         fprintf(stderr, "%s: Error while parsing header\n", filename);
 157         break;
 158     case AVERROR_NOFMT:
 159         fprintf(stderr, "%s: Unknown format\n", filename);
 160         break;
 161     case AVERROR(EIO):
 162         fprintf(stderr, "%s: I/O error occurred\n"
 163                 "Usually that means that input file is truncated and/or corrupted.\n",
 164                 filename);
 165         break;
 166     case AVERROR(ENOMEM):
 167         fprintf(stderr, "%s: memory allocation error occurred\n", filename);
 168         break;
 169     case AVERROR(ENOENT):
 170         fprintf(stderr, "%s: no such file or directory\n", filename);
 171         break;
 172     default:
 173         fprintf(stderr, "%s: Error while opening file\n", filename);
 174         break;
 175     }
 176 }
 177
 178 void show_banner(const char *program_name, int program_birth_year)
 179 {
 180     fprintf(stderr, "%s version " FFMPEG_VERSION ", Copyright (c) %d-2008 Fabrice Bellard, et al.\n",
 181             program_name, program_birth_year);
 182     fprintf(stderr, "  configuration: " FFMPEG_CONFIGURATION "\n");
 183     fprintf(stderr, "  libavutil version: " AV_STRINGIFY(LIBAVUTIL_VERSION) "\n");
 184     fprintf(stderr, "  libavcodec version: " AV_STRINGIFY(LIBAVCODEC_VERSION) "\n");
 185     fprintf(stderr, "  libavformat version: " AV_STRINGIFY(LIBAVFORMAT_VERSION) "\n");
 186     fprintf(stderr, "  libavdevice version: " AV_STRINGIFY(LIBAVDEVICE_VERSION) "\n");
 187 #if ENABLE_AVFILTER
 188     fprintf(stderr, "  libavfilter version: " AV_STRINGIFY(LIBAVFILTER_VERSION) "\n");
 189 #endif
 190     fprintf(stderr, "  built on " __DATE__ " " __TIME__);
 191 #ifdef __GNUC__
 192     fprintf(stderr, ", gcc: " __VERSION__ "\n");
 193 #else
 194     fprintf(stderr, ", using a non-gcc compiler\n");
 195 #endif
 196 }
 197
 198 void show_version(const char *program_name) {
 199      /* TODO: add function interface to avutil and avformat avdevice*/
 200     printf("%s " FFMPEG_VERSION "\n", program_name);
 201     printf("libavutil   %d\n"
 202            "libavcodec  %d\n"
 203            "libavformat %d\n"
 204            "libavdevice %d\n",
 205            LIBAVUTIL_BUILD, avcodec_build(), LIBAVFORMAT_BUILD, LIBAVDEVICE_BUILD);
 206 }
 207
 208 void show_license(void)
 209 {
 210 #ifdef CONFIG_NONFREE
 211     printf(
 212     "This version of FFmpeg has nonfree parts compiled in.\n"
 213     "Therefore it is not legally redistributable.\n"
 214     );
 215 #elif CONFIG_GPL
 216     printf(
 217     "FFmpeg is free software; you can redistribute it and/or modify\n"
 218     "it under the terms of the GNU General Public License as published by\n"
 219     "the Free Software Foundation; either version 2 of the License, or\n"
 220     "(at your option) any later version.\n"
 221     "\n"
 222     "FFmpeg is distributed in the hope that it will be useful,\n"
 223     "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
 224     "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n"
 225     "GNU General Public License for more details.\n"
 226     "\n"
 227     "You should have received a copy of the GNU General Public License\n"
 228     "along with FFmpeg; if not, write to the Free Software\n"
 229     "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n"
 230     );
 231 #else
 232     printf(
 233     "FFmpeg is free software; you can redistribute it and/or\n"
 234     "modify it under the terms of the GNU Lesser General Public\n"
 235     "License as published by the Free Software Foundation; either\n"
 236     "version 2.1 of the License, or (at your option) any later version.\n"
 237     "\n"
 238     "FFmpeg is distributed in the hope that it will be useful,\n"
 239     "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
 240     "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU\n"
 241     "Lesser General Public License for more details.\n"
 242     "\n"
 243     "You should have received a copy of the GNU Lesser General Public\n"
 244     "License along with FFmpeg; if not, write to the Free Software\n"
 245     "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n"
 246     );
 247 #endif
 248 }