Make parse_options() use parse_number_or_die().
[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 #include <math.h>
26
27 #include "avformat.h"
28 #include "avdevice.h"
29 #include "cmdutils.h"
30 #include "avstring.h"
31 #include "version.h"
32 #include "config.h"
33
34 #undef exit
35
36
37 double 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
54 void show_help_options(const OptionDef *options, const char *msg, int mask, int value)
55 {
56 const OptionDef *po;
57 int first;
58
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 }
67 av_strlcpy(buf, po->name, sizeof(buf));
68 if (po->flags & HAS_ARG) {
69 av_strlcat(buf, " ", sizeof(buf));
70 av_strlcat(buf, po->argname, sizeof(buf));
71 }
72 printf("-%-17s %s\n", buf, po->help);
73 }
74 }
75 }
76
77 static const OptionDef* find_option(const OptionDef *po, const char *name){
78 while (po->name != NULL) {
79 if (!strcmp(name, po->name))
80 break;
81 po++;
82 }
83 return po;
84 }
85
86 void parse_options(int argc, char **argv, const OptionDef *options,
87 void (* parse_arg_function)(const char*))
88 {
89 const char *opt, *arg;
90 int optindex, handleoptions=1;
91 const OptionDef *po;
92
93 /* parse options */
94 optindex = 1;
95 while (optindex < argc) {
96 opt = argv[optindex++];
97
98 if (handleoptions && opt[0] == '-' && opt[1] != '\0') {
99 if (opt[1] == '-' && opt[2] == '\0') {
100 handleoptions = 0;
101 continue;
102 }
103 po= find_option(options, opt + 1);
104 if (!po->name)
105 po= find_option(options, "default");
106 if (!po->name) {
107 unknown_opt:
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;
121 str = av_strdup(arg);
122 *po->u.str_arg = str;
123 } else if (po->flags & OPT_BOOL) {
124 *po->u.int_arg = 1;
125 } else if (po->flags & OPT_INT) {
126 *po->u.int_arg = parse_number_or_die(opt+1, arg, OPT_INT64, INT_MIN, INT_MAX);
127 } else if (po->flags & OPT_INT64) {
128 *po->u.int64_arg = parse_number_or_die(opt+1, arg, OPT_INT64, INT64_MIN, INT64_MAX);
129 } else if (po->flags & OPT_FLOAT) {
130 *po->u.float_arg = parse_number_or_die(opt+1, arg, OPT_FLOAT, -INFINITY, INFINITY);
131 } else if (po->flags & OPT_FUNC2) {
132 if(po->u.func2_arg(opt+1, arg)<0)
133 goto unknown_opt;
134 } else {
135 po->u.func_arg(arg);
136 }
137 } else {
138 if (parse_arg_function)
139 parse_arg_function(opt);
140 }
141 }
142 }
143
144 void 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"
151 " for img001.jpg, img002.jpg, ..., use 'img%%03d.jpg'.\n",
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;
160 case AVERROR(EIO):
161 fprintf(stderr, "%s: I/O error occured\n"
162 "Usually that means that input file is truncated and/or corrupted.\n",
163 filename);
164 break;
165 case AVERROR(ENOMEM):
166 fprintf(stderr, "%s: memory allocation error occured\n", filename);
167 break;
168 case AVERROR(ENOENT):
169 fprintf(stderr, "%s: no such file or directory\n", filename);
170 break;
171 default:
172 fprintf(stderr, "%s: Error while opening file\n", filename);
173 break;
174 }
175 }
176
177 void show_banner(const char *program_name, int program_birth_year)
178 {
179 fprintf(stderr, "%s version " FFMPEG_VERSION ", Copyright (c) %d-2008 Fabrice Bellard, et al.\n",
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");
185 fprintf(stderr, " libavdevice version: " AV_STRINGIFY(LIBAVDEVICE_VERSION) "\n");
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
194 void show_version(const char *program_name) {
195 /* TODO: add function interface to avutil and avformat avdevice*/
196 printf("%s " FFMPEG_VERSION "\n", program_name);
197 printf("libavutil %d\n"
198 "libavcodec %d\n"
199 "libavformat %d\n"
200 "libavdevice %d\n",
201 LIBAVUTIL_BUILD, avcodec_build(), LIBAVFORMAT_BUILD, LIBAVDEVICE_BUILD);
202 }
203
204 void show_license(void)
205 {
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
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 }