6726c3642be184a9a43128eda9c52a358d4f8c78
[libav.git] / 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
26 #include "avformat.h"
27 #include "cmdutils.h"
28 #include "avstring.h"
29
30 #undef exit
31
32 void show_help_options(const OptionDef *options, const char *msg, int mask, int value)
33 {
34 const OptionDef *po;
35 int first;
36
37 first = 1;
38 for(po = options; po->name != NULL; po++) {
39 char buf[64];
40 if ((po->flags & mask) == value) {
41 if (first) {
42 printf("%s", msg);
43 first = 0;
44 }
45 av_strlcpy(buf, po->name, sizeof(buf));
46 if (po->flags & HAS_ARG) {
47 av_strlcat(buf, " ", sizeof(buf));
48 av_strlcat(buf, po->argname, sizeof(buf));
49 }
50 printf("-%-17s %s\n", buf, po->help);
51 }
52 }
53 }
54
55 static const OptionDef* find_option(const OptionDef *po, const char *name){
56 while (po->name != NULL) {
57 if (!strcmp(name, po->name))
58 break;
59 po++;
60 }
61 return po;
62 }
63
64 void parse_options(int argc, char **argv, const OptionDef *options,
65 void (* parse_arg_function)(const char*))
66 {
67 const char *opt, *arg;
68 int optindex, handleoptions=1;
69 const OptionDef *po;
70
71 /* parse options */
72 optindex = 1;
73 while (optindex < argc) {
74 opt = argv[optindex++];
75
76 if (handleoptions && opt[0] == '-' && opt[1] != '\0') {
77 if (opt[1] == '-' && opt[2] == '\0') {
78 handleoptions = 0;
79 continue;
80 }
81 po= find_option(options, opt + 1);
82 if (!po->name)
83 po= find_option(options, "default");
84 if (!po->name) {
85 unknown_opt:
86 fprintf(stderr, "%s: unrecognized option '%s'\n", argv[0], opt);
87 exit(1);
88 }
89 arg = NULL;
90 if (po->flags & HAS_ARG) {
91 arg = argv[optindex++];
92 if (!arg) {
93 fprintf(stderr, "%s: missing argument for option '%s'\n", argv[0], opt);
94 exit(1);
95 }
96 }
97 if (po->flags & OPT_STRING) {
98 char *str;
99 str = av_strdup(arg);
100 *po->u.str_arg = str;
101 } else if (po->flags & OPT_BOOL) {
102 *po->u.int_arg = 1;
103 } else if (po->flags & OPT_INT) {
104 *po->u.int_arg = atoi(arg);
105 } else if (po->flags & OPT_INT64) {
106 *po->u.int64_arg = strtoll(arg, (char **)NULL, 10);
107 } else if (po->flags & OPT_FLOAT) {
108 *po->u.float_arg = atof(arg);
109 } else if (po->flags & OPT_FUNC2) {
110 if(po->u.func2_arg(opt+1, arg)<0)
111 goto unknown_opt;
112 } else {
113 po->u.func_arg(arg);
114 }
115 } else {
116 if (parse_arg_function)
117 parse_arg_function(opt);
118 }
119 }
120 }
121
122 void print_error(const char *filename, int err)
123 {
124 switch(err) {
125 case AVERROR_NUMEXPECTED:
126 fprintf(stderr, "%s: Incorrect image filename syntax.\n"
127 "Use '%%d' to specify the image number:\n"
128 " for img1.jpg, img2.jpg, ..., use 'img%%d.jpg';\n"
129 " for img001.jpg, img002.jpg, ..., use 'img%%03d.jpg'.\n",
130 filename);
131 break;
132 case AVERROR_INVALIDDATA:
133 fprintf(stderr, "%s: Error while parsing header\n", filename);
134 break;
135 case AVERROR_NOFMT:
136 fprintf(stderr, "%s: Unknown format\n", filename);
137 break;
138 case AVERROR(EIO):
139 fprintf(stderr, "%s: I/O error occured\n"
140 "Usually that means that input file is truncated and/or corrupted.\n",
141 filename);
142 break;
143 case AVERROR(ENOMEM):
144 fprintf(stderr, "%s: memory allocation error occured\n", filename);
145 break;
146 case AVERROR(ENOENT):
147 fprintf(stderr, "%s: no such file or directory\n", filename);
148 break;
149 default:
150 fprintf(stderr, "%s: Error while opening file\n", filename);
151 break;
152 }
153 }
154
155 void show_license(void)
156 {
157 #ifdef CONFIG_GPL
158 printf(
159 "FFmpeg is free software; you can redistribute it and/or modify\n"
160 "it under the terms of the GNU General Public License as published by\n"
161 "the Free Software Foundation; either version 2 of the License, or\n"
162 "(at your option) any later version.\n"
163 "\n"
164 "FFmpeg is distributed in the hope that it will be useful,\n"
165 "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
166 "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n"
167 "GNU General Public License for more details.\n"
168 "\n"
169 "You should have received a copy of the GNU General Public License\n"
170 "along with FFmpeg; if not, write to the Free Software\n"
171 "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n"
172 );
173 #else
174 printf(
175 "FFmpeg is free software; you can redistribute it and/or\n"
176 "modify it under the terms of the GNU Lesser General Public\n"
177 "License as published by the Free Software Foundation; either\n"
178 "version 2.1 of the License, or (at your option) any later version.\n"
179 "\n"
180 "FFmpeg is distributed in the hope that it will be useful,\n"
181 "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
182 "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU\n"
183 "Lesser General Public License for more details.\n"
184 "\n"
185 "You should have received a copy of the GNU Lesser General Public\n"
186 "License along with FFmpeg; if not, write to the Free Software\n"
187 "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n"
188 );
189 #endif
190 }