makes really sure that no undefined behavior can happen
[libav.git] / cmdutils.c
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1/*
2 * Various utilities for command line tools
3 * Copyright (c) 2000-2003 Fabrice Bellard
4 *
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5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
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8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
b78e7197 10 * version 2.1 of the License, or (at your option) any later version.
01310af2 11 *
b78e7197 12 * FFmpeg is distributed in the hope that it will be useful,
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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
b78e7197 18 * License along with FFmpeg; if not, write to the Free Software
5509bffa 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
01310af2 20 */
364a9607 21
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22#include <string.h>
23#include <stdlib.h>
24#include <errno.h>
7c84b8bc 25#include <math.h>
0f4e8165 26
01310af2 27#include "avformat.h"
2208741a 28#include "avdevice.h"
01310af2 29#include "cmdutils.h"
f7d78f36 30#include "avstring.h"
86074ed1 31#include "version.h"
b6cd8593 32#include "config.h"
01310af2 33
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34#undef exit
35
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36
37double 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
02d504a7 54void show_help_options(const OptionDef *options, const char *msg, int mask, int value)
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55{
56 const OptionDef *po;
02d504a7 57 int first;
01310af2 58
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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 }
f7d78f36 67 av_strlcpy(buf, po->name, sizeof(buf));
02d504a7 68 if (po->flags & HAS_ARG) {
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69 av_strlcat(buf, " ", sizeof(buf));
70 av_strlcat(buf, po->argname, sizeof(buf));
01310af2 71 }
02d504a7 72 printf("-%-17s %s\n", buf, po->help);
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73 }
74 }
75}
76
fccfc475 77static const OptionDef* find_option(const OptionDef *po, const char *name){
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78 while (po->name != NULL) {
79 if (!strcmp(name, po->name))
80 break;
81 po++;
82 }
83 return po;
84}
85
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86void parse_options(int argc, char **argv, const OptionDef *options,
87 void (* parse_arg_function)(const char*))
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88{
89 const char *opt, *arg;
b0d7bc1e 90 int optindex, handleoptions=1;
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91 const OptionDef *po;
92
93 /* parse options */
94 optindex = 1;
95 while (optindex < argc) {
96 opt = argv[optindex++];
115329f1 97
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98 if (handleoptions && opt[0] == '-' && opt[1] != '\0') {
99 if (opt[1] == '-' && opt[2] == '\0') {
100 handleoptions = 0;
101 continue;
102 }
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103 po= find_option(options, opt + 1);
104 if (!po->name)
105 po= find_option(options, "default");
01310af2 106 if (!po->name) {
8bbf6db9 107unknown_opt:
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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;
02d504a7 121 str = av_strdup(arg);
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122 *po->u.str_arg = str;
123 } else if (po->flags & OPT_BOOL) {
124 *po->u.int_arg = 1;
26d4f26b 125 } else if (po->flags & OPT_INT) {
7c84b8bc 126 *po->u.int_arg = parse_number_or_die(opt+1, arg, OPT_INT64, INT_MIN, INT_MAX);
ffdf9a1f 127 } else if (po->flags & OPT_INT64) {
7c84b8bc 128 *po->u.int64_arg = parse_number_or_die(opt+1, arg, OPT_INT64, INT64_MIN, INT64_MAX);
1f631450 129 } else if (po->flags & OPT_FLOAT) {
7c84b8bc 130 *po->u.float_arg = parse_number_or_die(opt+1, arg, OPT_FLOAT, -INFINITY, INFINITY);
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131 } else if (po->flags & OPT_FUNC2) {
132 if(po->u.func2_arg(opt+1, arg)<0)
133 goto unknown_opt;
01310af2 134 } else {
bb270c08 135 po->u.func_arg(arg);
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136 }
137 } else {
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138 if (parse_arg_function)
139 parse_arg_function(opt);
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140 }
141 }
142}
143
144void 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"
115329f1 151 " for img001.jpg, img002.jpg, ..., use 'img%%03d.jpg'.\n",
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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;
6f3e0b21 160 case AVERROR(EIO):
45ce5ddb 161 fprintf(stderr, "%s: I/O error occured\n"
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162 "Usually that means that input file is truncated and/or corrupted.\n",
163 filename);
45ce5ddb 164 break;
769e10f0 165 case AVERROR(ENOMEM):
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166 fprintf(stderr, "%s: memory allocation error occured\n", filename);
167 break;
24fddf48 168 case AVERROR(ENOENT):
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169 fprintf(stderr, "%s: no such file or directory\n", filename);
170 break;
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171 default:
172 fprintf(stderr, "%s: Error while opening file\n", filename);
173 break;
174 }
175}
f35917b2 176
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177void show_banner(const char *program_name, int program_birth_year)
178{
69c12fbb 179 fprintf(stderr, "%s version " FFMPEG_VERSION ", Copyright (c) %d-2008 Fabrice Bellard, et al.\n",
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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");
2208741a 185 fprintf(stderr, " libavdevice version: " AV_STRINGIFY(LIBAVDEVICE_VERSION) "\n");
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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
194void show_version(const char *program_name) {
2208741a 195 /* TODO: add function interface to avutil and avformat avdevice*/
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196 printf("%s " FFMPEG_VERSION "\n", program_name);
197 printf("libavutil %d\n"
198 "libavcodec %d\n"
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199 "libavformat %d\n"
200 "libavdevice %d\n",
201 LIBAVUTIL_BUILD, avcodec_build(), LIBAVFORMAT_BUILD, LIBAVDEVICE_BUILD);
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202}
203
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204void show_license(void)
205{
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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
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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}