remove useless var
[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
63d026b1 27#include "config.h"
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28#include "libavformat/avformat.h"
29#include "libavfilter/avfilter.h"
30#include "libavdevice/avdevice.h"
31#include "libavutil/avstring.h"
01310af2 32#include "cmdutils.h"
86074ed1 33#include "version.h"
0b705fa4 34#ifdef CONFIG_NETWORK
245976da 35#include "libavformat/network.h"
0b705fa4 36#endif
01310af2 37
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38#undef exit
39
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40
41double 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
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58int64_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
02d504a7 69void show_help_options(const OptionDef *options, const char *msg, int mask, int value)
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70{
71 const OptionDef *po;
02d504a7 72 int first;
01310af2 73
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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 }
f7d78f36 82 av_strlcpy(buf, po->name, sizeof(buf));
02d504a7 83 if (po->flags & HAS_ARG) {
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84 av_strlcat(buf, " ", sizeof(buf));
85 av_strlcat(buf, po->argname, sizeof(buf));
01310af2 86 }
02d504a7 87 printf("-%-17s %s\n", buf, po->help);
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88 }
89 }
90}
91
fccfc475 92static const OptionDef* find_option(const OptionDef *po, const char *name){
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93 while (po->name != NULL) {
94 if (!strcmp(name, po->name))
95 break;
96 po++;
97 }
98 return po;
99}
100
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101void parse_options(int argc, char **argv, const OptionDef *options,
102 void (* parse_arg_function)(const char*))
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103{
104 const char *opt, *arg;
b0d7bc1e 105 int optindex, handleoptions=1;
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106 const OptionDef *po;
107
108 /* parse options */
109 optindex = 1;
110 while (optindex < argc) {
111 opt = argv[optindex++];
115329f1 112
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113 if (handleoptions && opt[0] == '-' && opt[1] != '\0') {
114 if (opt[1] == '-' && opt[2] == '\0') {
115 handleoptions = 0;
116 continue;
117 }
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118 po= find_option(options, opt + 1);
119 if (!po->name)
120 po= find_option(options, "default");
01310af2 121 if (!po->name) {
8bbf6db9 122unknown_opt:
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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;
02d504a7 136 str = av_strdup(arg);
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137 *po->u.str_arg = str;
138 } else if (po->flags & OPT_BOOL) {
139 *po->u.int_arg = 1;
26d4f26b 140 } else if (po->flags & OPT_INT) {
7c84b8bc 141 *po->u.int_arg = parse_number_or_die(opt+1, arg, OPT_INT64, INT_MIN, INT_MAX);
ffdf9a1f 142 } else if (po->flags & OPT_INT64) {
7c84b8bc 143 *po->u.int64_arg = parse_number_or_die(opt+1, arg, OPT_INT64, INT64_MIN, INT64_MAX);
1f631450 144 } else if (po->flags & OPT_FLOAT) {
1f3d74d3 145 *po->u.float_arg = parse_number_or_die(opt+1, arg, OPT_FLOAT, -1.0/0.0, 1.0/0.0);
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146 } else if (po->flags & OPT_FUNC2) {
147 if(po->u.func2_arg(opt+1, arg)<0)
148 goto unknown_opt;
01310af2 149 } else {
bb270c08 150 po->u.func_arg(arg);
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151 }
152 } else {
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153 if (parse_arg_function)
154 parse_arg_function(opt);
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155 }
156 }
157}
158
159void 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"
115329f1 166 " for img001.jpg, img002.jpg, ..., use 'img%%03d.jpg'.\n",
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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;
6f3e0b21 175 case AVERROR(EIO):
d9526386 176 fprintf(stderr, "%s: I/O error occurred\n"
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177 "Usually that means that input file is truncated and/or corrupted.\n",
178 filename);
45ce5ddb 179 break;
769e10f0 180 case AVERROR(ENOMEM):
d9526386 181 fprintf(stderr, "%s: memory allocation error occurred\n", filename);
45ce5ddb 182 break;
24fddf48 183 case AVERROR(ENOENT):
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184 fprintf(stderr, "%s: no such file or directory\n", filename);
185 break;
0b705fa4 186#ifdef CONFIG_NETWORK
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187 case AVERROR(FF_NETERROR(EPROTONOSUPPORT)):
188 fprintf(stderr, "%s: Unsupported network protocol\n", filename);
189 break;
0b705fa4 190#endif
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191 default:
192 fprintf(stderr, "%s: Error while opening file\n", filename);
193 break;
194 }
195}
f35917b2 196
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197void show_banner(const char *program_name, int program_birth_year)
198{
69c12fbb 199 fprintf(stderr, "%s version " FFMPEG_VERSION ", Copyright (c) %d-2008 Fabrice Bellard, et al.\n",
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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");
2208741a 205 fprintf(stderr, " libavdevice version: " AV_STRINGIFY(LIBAVDEVICE_VERSION) "\n");
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206#if ENABLE_AVFILTER
207 fprintf(stderr, " libavfilter version: " AV_STRINGIFY(LIBAVFILTER_VERSION) "\n");
208#endif
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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
217void show_version(const char *program_name) {
2208741a 218 /* TODO: add function interface to avutil and avformat avdevice*/
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219 printf("%s " FFMPEG_VERSION "\n", program_name);
220 printf("libavutil %d\n"
221 "libavcodec %d\n"
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222 "libavformat %d\n"
223 "libavdevice %d\n",
224 LIBAVUTIL_BUILD, avcodec_build(), LIBAVFORMAT_BUILD, LIBAVDEVICE_BUILD);
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225}
226
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227void show_license(void)
228{
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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
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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}