Initialize correctly optind.
[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>
25
01310af2 26#include "avformat.h"
01310af2 27#include "cmdutils.h"
f7d78f36 28#include "avstring.h"
86074ed1 29#include "version.h"
b6cd8593 30#include "config.h"
01310af2 31
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32#undef exit
33
02d504a7 34void show_help_options(const OptionDef *options, const char *msg, int mask, int value)
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35{
36 const OptionDef *po;
02d504a7 37 int first;
01310af2 38
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39 first = 1;
40 for(po = options; po->name != NULL; po++) {
41 char buf[64];
42 if ((po->flags & mask) == value) {
43 if (first) {
44 printf("%s", msg);
45 first = 0;
46 }
f7d78f36 47 av_strlcpy(buf, po->name, sizeof(buf));
02d504a7 48 if (po->flags & HAS_ARG) {
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49 av_strlcat(buf, " ", sizeof(buf));
50 av_strlcat(buf, po->argname, sizeof(buf));
01310af2 51 }
02d504a7 52 printf("-%-17s %s\n", buf, po->help);
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53 }
54 }
55}
56
fccfc475 57static const OptionDef* find_option(const OptionDef *po, const char *name){
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58 while (po->name != NULL) {
59 if (!strcmp(name, po->name))
60 break;
61 po++;
62 }
63 return po;
64}
65
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66void parse_options(int argc, char **argv, const OptionDef *options,
67 void (* parse_arg_function)(const char*))
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68{
69 const char *opt, *arg;
b0d7bc1e 70 int optindex, handleoptions=1;
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71 const OptionDef *po;
72
73 /* parse options */
74 optindex = 1;
75 while (optindex < argc) {
76 opt = argv[optindex++];
115329f1 77
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78 if (handleoptions && opt[0] == '-' && opt[1] != '\0') {
79 if (opt[1] == '-' && opt[2] == '\0') {
80 handleoptions = 0;
81 continue;
82 }
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83 po= find_option(options, opt + 1);
84 if (!po->name)
85 po= find_option(options, "default");
01310af2 86 if (!po->name) {
8bbf6db9 87unknown_opt:
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88 fprintf(stderr, "%s: unrecognized option '%s'\n", argv[0], opt);
89 exit(1);
90 }
91 arg = NULL;
92 if (po->flags & HAS_ARG) {
93 arg = argv[optindex++];
94 if (!arg) {
95 fprintf(stderr, "%s: missing argument for option '%s'\n", argv[0], opt);
96 exit(1);
97 }
98 }
99 if (po->flags & OPT_STRING) {
100 char *str;
02d504a7 101 str = av_strdup(arg);
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102 *po->u.str_arg = str;
103 } else if (po->flags & OPT_BOOL) {
104 *po->u.int_arg = 1;
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105 } else if (po->flags & OPT_INT) {
106 *po->u.int_arg = atoi(arg);
ffdf9a1f 107 } else if (po->flags & OPT_INT64) {
946d3b12 108 *po->u.int64_arg = strtoll(arg, (char **)NULL, 10);
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109 } else if (po->flags & OPT_FLOAT) {
110 *po->u.float_arg = atof(arg);
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111 } else if (po->flags & OPT_FUNC2) {
112 if(po->u.func2_arg(opt+1, arg)<0)
113 goto unknown_opt;
01310af2 114 } else {
bb270c08 115 po->u.func_arg(arg);
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116 }
117 } else {
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118 if (parse_arg_function)
119 parse_arg_function(opt);
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120 }
121 }
122}
123
124void print_error(const char *filename, int err)
125{
126 switch(err) {
127 case AVERROR_NUMEXPECTED:
128 fprintf(stderr, "%s: Incorrect image filename syntax.\n"
129 "Use '%%d' to specify the image number:\n"
130 " for img1.jpg, img2.jpg, ..., use 'img%%d.jpg';\n"
115329f1 131 " for img001.jpg, img002.jpg, ..., use 'img%%03d.jpg'.\n",
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132 filename);
133 break;
134 case AVERROR_INVALIDDATA:
135 fprintf(stderr, "%s: Error while parsing header\n", filename);
136 break;
137 case AVERROR_NOFMT:
138 fprintf(stderr, "%s: Unknown format\n", filename);
139 break;
6f3e0b21 140 case AVERROR(EIO):
45ce5ddb 141 fprintf(stderr, "%s: I/O error occured\n"
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142 "Usually that means that input file is truncated and/or corrupted.\n",
143 filename);
45ce5ddb 144 break;
769e10f0 145 case AVERROR(ENOMEM):
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146 fprintf(stderr, "%s: memory allocation error occured\n", filename);
147 break;
24fddf48 148 case AVERROR(ENOENT):
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149 fprintf(stderr, "%s: no such file or directory\n", filename);
150 break;
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151 default:
152 fprintf(stderr, "%s: Error while opening file\n", filename);
153 break;
154 }
155}
f35917b2 156
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157void show_banner(const char *program_name, int program_birth_year)
158{
69c12fbb 159 fprintf(stderr, "%s version " FFMPEG_VERSION ", Copyright (c) %d-2008 Fabrice Bellard, et al.\n",
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160 program_name, program_birth_year);
161 fprintf(stderr, " configuration: " FFMPEG_CONFIGURATION "\n");
162 fprintf(stderr, " libavutil version: " AV_STRINGIFY(LIBAVUTIL_VERSION) "\n");
163 fprintf(stderr, " libavcodec version: " AV_STRINGIFY(LIBAVCODEC_VERSION) "\n");
164 fprintf(stderr, " libavformat version: " AV_STRINGIFY(LIBAVFORMAT_VERSION) "\n");
165 fprintf(stderr, " built on " __DATE__ " " __TIME__);
166#ifdef __GNUC__
167 fprintf(stderr, ", gcc: " __VERSION__ "\n");
168#else
169 fprintf(stderr, ", using a non-gcc compiler\n");
170#endif
171}
172
173void show_version(const char *program_name) {
174 /* TODO: add function interface to avutil and avformat */
175 printf("%s " FFMPEG_VERSION "\n", program_name);
176 printf("libavutil %d\n"
177 "libavcodec %d\n"
178 "libavformat %d\n",
179 LIBAVUTIL_BUILD, avcodec_build(), LIBAVFORMAT_BUILD);
180}
181
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182void show_license(void)
183{
184#ifdef CONFIG_GPL
185 printf(
186 "FFmpeg is free software; you can redistribute it and/or modify\n"
187 "it under the terms of the GNU General Public License as published by\n"
188 "the Free Software Foundation; either version 2 of the License, or\n"
189 "(at your option) any later version.\n"
190 "\n"
191 "FFmpeg is distributed in the hope that it will be useful,\n"
192 "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
193 "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n"
194 "GNU General Public License for more details.\n"
195 "\n"
196 "You should have received a copy of the GNU General Public License\n"
197 "along with FFmpeg; if not, write to the Free Software\n"
198 "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n"
199 );
200#else
201 printf(
202 "FFmpeg is free software; you can redistribute it and/or\n"
203 "modify it under the terms of the GNU Lesser General Public\n"
204 "License as published by the Free Software Foundation; either\n"
205 "version 2.1 of the License, or (at your option) any later version.\n"
206 "\n"
207 "FFmpeg is distributed in the hope that it will be useful,\n"
208 "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
209 "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU\n"
210 "Lesser General Public License for more details.\n"
211 "\n"
212 "You should have received a copy of the GNU Lesser General Public\n"
213 "License along with FFmpeg; if not, write to the Free Software\n"
214 "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n"
215 );
216#endif
217}