Fix a bug in av_find_opt(). Because some of the AVOption structures have field
[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"
d705e4a6 23#include "common.h"
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24
25#include "cmdutils.h"
26
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27#undef exit
28
02d504a7 29void show_help_options(const OptionDef *options, const char *msg, int mask, int value)
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30{
31 const OptionDef *po;
02d504a7 32 int first;
01310af2 33
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34 first = 1;
35 for(po = options; po->name != NULL; po++) {
36 char buf[64];
37 if ((po->flags & mask) == value) {
38 if (first) {
39 printf("%s", msg);
40 first = 0;
41 }
0ecca7a4 42 pstrcpy(buf, sizeof(buf), po->name);
02d504a7 43 if (po->flags & HAS_ARG) {
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44 pstrcat(buf, sizeof(buf), " ");
45 pstrcat(buf, sizeof(buf), po->argname);
01310af2 46 }
02d504a7 47 printf("-%-17s %s\n", buf, po->help);
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48 }
49 }
50}
51
fccfc475 52static const OptionDef* find_option(const OptionDef *po, const char *name){
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53 while (po->name != NULL) {
54 if (!strcmp(name, po->name))
55 break;
56 po++;
57 }
58 return po;
59}
60
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61void parse_options(int argc, char **argv, const OptionDef *options)
62{
63 const char *opt, *arg;
b0d7bc1e 64 int optindex, handleoptions=1;
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65 const OptionDef *po;
66
67 /* parse options */
68 optindex = 1;
69 while (optindex < argc) {
70 opt = argv[optindex++];
115329f1 71
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72 if (handleoptions && opt[0] == '-' && opt[1] != '\0') {
73 if (opt[1] == '-' && opt[2] == '\0') {
74 handleoptions = 0;
75 continue;
76 }
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77 po= find_option(options, opt + 1);
78 if (!po->name)
79 po= find_option(options, "default");
01310af2 80 if (!po->name) {
8bbf6db9 81unknown_opt:
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82 fprintf(stderr, "%s: unrecognized option '%s'\n", argv[0], opt);
83 exit(1);
84 }
85 arg = NULL;
86 if (po->flags & HAS_ARG) {
87 arg = argv[optindex++];
88 if (!arg) {
89 fprintf(stderr, "%s: missing argument for option '%s'\n", argv[0], opt);
90 exit(1);
91 }
92 }
93 if (po->flags & OPT_STRING) {
94 char *str;
02d504a7 95 str = av_strdup(arg);
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96 *po->u.str_arg = str;
97 } else if (po->flags & OPT_BOOL) {
98 *po->u.int_arg = 1;
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99 } else if (po->flags & OPT_INT) {
100 *po->u.int_arg = atoi(arg);
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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 default:
140 fprintf(stderr, "%s: Error while opening file\n", filename);
141 break;
142 }
143}