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[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 */
02d504a7 21#define HAVE_AV_CONFIG_H
01310af2 22#include "avformat.h"
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23#include "cmdutils.h"
24
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25#undef exit
26
02d504a7 27void show_help_options(const OptionDef *options, const char *msg, int mask, int value)
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28{
29 const OptionDef *po;
02d504a7 30 int first;
01310af2 31
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32 first = 1;
33 for(po = options; po->name != NULL; po++) {
34 char buf[64];
35 if ((po->flags & mask) == value) {
36 if (first) {
37 printf("%s", msg);
38 first = 0;
39 }
0ecca7a4 40 pstrcpy(buf, sizeof(buf), po->name);
02d504a7 41 if (po->flags & HAS_ARG) {
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42 pstrcat(buf, sizeof(buf), " ");
43 pstrcat(buf, sizeof(buf), po->argname);
01310af2 44 }
02d504a7 45 printf("-%-17s %s\n", buf, po->help);
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46 }
47 }
48}
49
fccfc475 50static const OptionDef* find_option(const OptionDef *po, const char *name){
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51 while (po->name != NULL) {
52 if (!strcmp(name, po->name))
53 break;
54 po++;
55 }
56 return po;
57}
58
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59void parse_options(int argc, char **argv, const OptionDef *options)
60{
61 const char *opt, *arg;
b0d7bc1e 62 int optindex, handleoptions=1;
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63 const OptionDef *po;
64
65 /* parse options */
66 optindex = 1;
67 while (optindex < argc) {
68 opt = argv[optindex++];
115329f1 69
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70 if (handleoptions && opt[0] == '-' && opt[1] != '\0') {
71 if (opt[1] == '-' && opt[2] == '\0') {
72 handleoptions = 0;
73 continue;
74 }
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75 po= find_option(options, opt + 1);
76 if (!po->name)
77 po= find_option(options, "default");
01310af2 78 if (!po->name) {
8bbf6db9 79unknown_opt:
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80 fprintf(stderr, "%s: unrecognized option '%s'\n", argv[0], opt);
81 exit(1);
82 }
83 arg = NULL;
84 if (po->flags & HAS_ARG) {
85 arg = argv[optindex++];
86 if (!arg) {
87 fprintf(stderr, "%s: missing argument for option '%s'\n", argv[0], opt);
88 exit(1);
89 }
90 }
91 if (po->flags & OPT_STRING) {
92 char *str;
02d504a7 93 str = av_strdup(arg);
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94 *po->u.str_arg = str;
95 } else if (po->flags & OPT_BOOL) {
96 *po->u.int_arg = 1;
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97 } else if (po->flags & OPT_INT) {
98 *po->u.int_arg = atoi(arg);
ffdf9a1f 99 } else if (po->flags & OPT_INT64) {
946d3b12 100 *po->u.int64_arg = strtoll(arg, (char **)NULL, 10);
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101 } else if (po->flags & OPT_FLOAT) {
102 *po->u.float_arg = atof(arg);
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103 } else if (po->flags & OPT_FUNC2) {
104 if(po->u.func2_arg(opt+1, arg)<0)
105 goto unknown_opt;
01310af2 106 } else {
bb270c08 107 po->u.func_arg(arg);
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108 }
109 } else {
110 parse_arg_file(opt);
111 }
112 }
113}
114
115void print_error(const char *filename, int err)
116{
117 switch(err) {
118 case AVERROR_NUMEXPECTED:
119 fprintf(stderr, "%s: Incorrect image filename syntax.\n"
120 "Use '%%d' to specify the image number:\n"
121 " for img1.jpg, img2.jpg, ..., use 'img%%d.jpg';\n"
115329f1 122 " for img001.jpg, img002.jpg, ..., use 'img%%03d.jpg'.\n",
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123 filename);
124 break;
125 case AVERROR_INVALIDDATA:
126 fprintf(stderr, "%s: Error while parsing header\n", filename);
127 break;
128 case AVERROR_NOFMT:
129 fprintf(stderr, "%s: Unknown format\n", filename);
130 break;
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131 case AVERROR_IO:
132 fprintf(stderr, "%s: I/O error occured\n"
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133 "Usually that means that input file is truncated and/or corrupted.\n",
134 filename);
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135 break;
136 case AVERROR_NOMEM:
137 fprintf(stderr, "%s: memory allocation error occured\n", filename);
138 break;
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139 case AVERROR_NOENT:
140 fprintf(stderr, "%s: no such file or directory\n", filename);
141 break;
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142 default:
143 fprintf(stderr, "%s: Error while opening file\n", filename);
144 break;
145 }
146}