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 "libavformat/avformat.h"
  29 #include "libavfilter/avfilter.h"
  30 #include "libavdevice/avdevice.h"
  31 #include "libavutil/avstring.h"
  32 #include "cmdutils.h"
  33 #include "version.h"
  34 #ifdef CONFIG_NETWORK
  35 #include "libavformat/network.h"
  36 #endif
  37
  38 #undef exit
  39
  40
  41 double parse_number_or_die(const char *context, const char *numstr, int type, double min, double max)
  42 {
  43     char *tail;
  44     const char *error;
  45     double d = strtod(numstr, &tail);
  46     if (*tail)
  47         error= "Expected number for %s but found: %s\n";
  48     else if (d < min || d > max)
  49         error= "The value for %s was %s which is not within %f - %f\n";
  50     else if(type == OPT_INT64 && (int64_t)d != d)
  51         error= "Expected int64 for %s but found %s\n";
  52     else
  53         return d;
  54     fprintf(stderr, error, context, numstr, min, max);
  55     exit(1);
  56 }
  57
  58 int64_t parse_time_or_die(const char *context, const char *timestr, int is_duration)
  59 {
  60     int64_t us = parse_date(timestr, is_duration);
  61     if (us == INT64_MIN) {
  62         fprintf(stderr, "Invalid %s specification for %s: %s\n",
  63                 is_duration ? "duration" : "date", context, timestr);
  64         exit(1);
  65     }
  66     return us;
  67 }
  68
  69 void show_help_options(const OptionDef *options, const char *msg, int mask, int value)
  70 {
  71     const OptionDef *po;
  72     int first;
  73
  74     first = 1;
  75     for(po = options; po->name != NULL; po++) {
  76         char buf[64];
  77         if ((po->flags & mask) == value) {
  78             if (first) {
  79                 printf("%s", msg);
  80                 first = 0;
  81             }
  82             av_strlcpy(buf, po->name, sizeof(buf));
  83             if (po->flags & HAS_ARG) {
  84                 av_strlcat(buf, " ", sizeof(buf));
  85                 av_strlcat(buf, po->argname, sizeof(buf));
  86             }
  87             printf("-%-17s  %s\n", buf, po->help);
  88         }
  89     }
  90 }
  91
  92 static const OptionDef* find_option(const OptionDef *po, const char *name){
  93     while (po->name != NULL) {
  94         if (!strcmp(name, po->name))
  95             break;
  96         po++;
  97     }
  98     return po;
  99 }
 100
 101 void parse_options(int argc, char **argv, const OptionDef *options,
 102                    void (* parse_arg_function)(const char*))
 103 {
 104     const char *opt, *arg;
 105     int optindex, handleoptions=1;
 106     const OptionDef *po;
 107
 108     /* parse options */
 109     optindex = 1;
 110     while (optindex < argc) {
 111         opt = argv[optindex++];
 112
 113         if (handleoptions && opt[0] == '-' && opt[1] != '\0') {
 114           if (opt[1] == '-' && opt[2] == '\0') {
 115             handleoptions = 0;
 116             continue;
 117           }
 118             po= find_option(options, opt + 1);
 119             if (!po->name)
 120                 po= find_option(options, "default");
 121             if (!po->name) {
 122 unknown_opt:
 123                 fprintf(stderr, "%s: unrecognized option '%s'\n", argv[0], opt);
 124                 exit(1);
 125             }
 126             arg = NULL;
 127             if (po->flags & HAS_ARG) {
 128                 arg = argv[optindex++];
 129                 if (!arg) {
 130                     fprintf(stderr, "%s: missing argument for option '%s'\n", argv[0], opt);
 131                     exit(1);
 132                 }
 133             }
 134             if (po->flags & OPT_STRING) {
 135                 char *str;
 136                 str = av_strdup(arg);
 137                 *po->u.str_arg = str;
 138             } else if (po->flags & OPT_BOOL) {
 139                 *po->u.int_arg = 1;
 140             } else if (po->flags & OPT_INT) {
 141                 *po->u.int_arg = parse_number_or_die(opt+1, arg, OPT_INT64, INT_MIN, INT_MAX);
 142             } else if (po->flags & OPT_INT64) {
 143                 *po->u.int64_arg = parse_number_or_die(opt+1, arg, OPT_INT64, INT64_MIN, INT64_MAX);
 144             } else if (po->flags & OPT_FLOAT) {
 145                 *po->u.float_arg = parse_number_or_die(opt+1, arg, OPT_FLOAT, -1.0/0.0, 1.0/0.0);
 146             } else if (po->flags & OPT_FUNC2) {
 147                 if(po->u.func2_arg(opt+1, arg)<0)
 148                     goto unknown_opt;
 149             } else {
 150                 po->u.func_arg(arg);
 151             }
 152         } else {
 153             if (parse_arg_function)
 154                 parse_arg_function(opt);
 155         }
 156     }
 157 }
 158
 159 void print_error(const char *filename, int err)
 160 {
 161     switch(err) {
 162     case AVERROR_NUMEXPECTED:
 163         fprintf(stderr, "%s: Incorrect image filename syntax.\n"
 164                 "Use '%%d' to specify the image number:\n"
 165                 "  for img1.jpg, img2.jpg, ..., use 'img%%d.jpg';\n"
 166                 "  for img001.jpg, img002.jpg, ..., use 'img%%03d.jpg'.\n",
 167                 filename);
 168         break;
 169     case AVERROR_INVALIDDATA:
 170         fprintf(stderr, "%s: Error while parsing header\n", filename);
 171         break;
 172     case AVERROR_NOFMT:
 173         fprintf(stderr, "%s: Unknown format\n", filename);
 174         break;
 175     case AVERROR(EIO):
 176         fprintf(stderr, "%s: I/O error occurred\n"
 177                 "Usually that means that input file is truncated and/or corrupted.\n",
 178                 filename);
 179         break;
 180     case AVERROR(ENOMEM):
 181         fprintf(stderr, "%s: memory allocation error occurred\n", filename);
 182         break;
 183     case AVERROR(ENOENT):
 184         fprintf(stderr, "%s: no such file or directory\n", filename);
 185         break;
 186 #ifdef CONFIG_NETWORK
 187     case AVERROR(FF_NETERROR(EPROTONOSUPPORT)):
 188         fprintf(stderr, "%s: Unsupported network protocol\n", filename);
 189         break;
 190 #endif
 191     default:
 192         fprintf(stderr, "%s: Error while opening file\n", filename);
 193         break;
 194     }
 195 }
 196
 197 void show_banner(const char *program_name, int program_birth_year)
 198 {
 199     fprintf(stderr, "%s version " FFMPEG_VERSION ", Copyright (c) %d-2008 Fabrice Bellard, et al.\n",
 200             program_name, program_birth_year);
 201     fprintf(stderr, "  configuration: " FFMPEG_CONFIGURATION "\n");
 202     fprintf(stderr, "  libavutil version: " AV_STRINGIFY(LIBAVUTIL_VERSION) "\n");
 203     fprintf(stderr, "  libavcodec version: " AV_STRINGIFY(LIBAVCODEC_VERSION) "\n");
 204     fprintf(stderr, "  libavformat version: " AV_STRINGIFY(LIBAVFORMAT_VERSION) "\n");
 205     fprintf(stderr, "  libavdevice version: " AV_STRINGIFY(LIBAVDEVICE_VERSION) "\n");
 206 #if ENABLE_AVFILTER
 207     fprintf(stderr, "  libavfilter version: " AV_STRINGIFY(LIBAVFILTER_VERSION) "\n");
 208 #endif
 209     fprintf(stderr, "  built on " __DATE__ " " __TIME__);
 210 #ifdef __GNUC__
 211     fprintf(stderr, ", gcc: " __VERSION__ "\n");
 212 #else
 213     fprintf(stderr, ", using a non-gcc compiler\n");
 214 #endif
 215 }
 216
 217 void show_version(const char *program_name) {
 218      /* TODO: add function interface to avutil and avformat avdevice*/
 219     printf("%s " FFMPEG_VERSION "\n", program_name);
 220     printf("libavutil   %d\n"
 221            "libavcodec  %d\n"
 222            "libavformat %d\n"
 223            "libavdevice %d\n",
 224            LIBAVUTIL_BUILD, avcodec_build(), LIBAVFORMAT_BUILD, LIBAVDEVICE_BUILD);
 225 }
 226
 227 void show_license(void)
 228 {
 229 #ifdef CONFIG_NONFREE
 230     printf(
 231     "This version of FFmpeg has nonfree parts compiled in.\n"
 232     "Therefore it is not legally redistributable.\n"
 233     );
 234 #elif CONFIG_GPL
 235     printf(
 236     "FFmpeg is free software; you can redistribute it and/or modify\n"
 237     "it under the terms of the GNU General Public License as published by\n"
 238     "the Free Software Foundation; either version 2 of the License, or\n"
 239     "(at your option) any later version.\n"
 240     "\n"
 241     "FFmpeg is distributed in the hope that it will be useful,\n"
 242     "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
 243     "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n"
 244     "GNU General Public License for more details.\n"
 245     "\n"
 246     "You should have received a copy of the GNU General Public License\n"
 247     "along with FFmpeg; if not, write to the Free Software\n"
 248     "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n"
 249     );
 250 #else
 251     printf(
 252     "FFmpeg is free software; you can redistribute it and/or\n"
 253     "modify it under the terms of the GNU Lesser General Public\n"
 254     "License as published by the Free Software Foundation; either\n"
 255     "version 2.1 of the License, or (at your option) any later version.\n"
 256     "\n"
 257     "FFmpeg is distributed in the hope that it will be useful,\n"
 258     "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
 259     "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU\n"
 260     "Lesser General Public License for more details.\n"
 261     "\n"
 262     "You should have received a copy of the GNU Lesser General Public\n"
 263     "License along with FFmpeg; if not, write to the Free Software\n"
 264     "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n"
 265     );
 266 #endif
 267 }