2 * Various utilities for command line tools
3 * Copyright (c) 2000-2003 Fabrice Bellard
5 * This file is part of FFmpeg.
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.
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.
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
32 void show_help_options(const OptionDef *options, const char *msg, int mask, int value)
38 for(po = options; po->name != NULL; po++) {
40 if ((po->flags & mask) == value) {
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));
50 printf("-%-17s %s\n", buf, po->help);
55 static const OptionDef* find_option(const OptionDef *po, const char *name){
56 while (po->name != NULL) {
57 if (!strcmp(name, po->name))
64 void parse_options(int argc, char **argv, const OptionDef *options,
65 void (* parse_arg_function)(const char*))
67 const char *opt, *arg;
68 int optindex, handleoptions=1;
73 while (optindex < argc) {
74 opt = argv[optindex++];
76 if (handleoptions && opt[0] == '-' && opt[1] != '\0') {
77 if (opt[1] == '-' && opt[2] == '\0') {
81 po= find_option(options, opt + 1);
83 po= find_option(options, "default");
86 fprintf(stderr, "%s: unrecognized option '%s'\n", argv[0], opt);
90 if (po->flags & HAS_ARG) {
91 arg = argv[optindex++];
93 fprintf(stderr, "%s: missing argument for option '%s'\n", argv[0], opt);
97 if (po->flags & OPT_STRING) {
100 *po->u.str_arg = str;
101 } else if (po->flags & OPT_BOOL) {
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)
116 if (parse_arg_function)
117 parse_arg_function(opt);
122 void print_error(const char *filename, int 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",
132 case AVERROR_INVALIDDATA:
133 fprintf(stderr, "%s: Error while parsing header\n", filename);
136 fprintf(stderr, "%s: Unknown format\n", filename);
139 fprintf(stderr, "%s: I/O error occured\n"
140 "Usually that means that input file is truncated and/or corrupted.\n",
143 case AVERROR(ENOMEM):
144 fprintf(stderr, "%s: memory allocation error occured\n", filename);
146 case AVERROR(ENOENT):
147 fprintf(stderr, "%s: no such file or directory\n", filename);
150 fprintf(stderr, "%s: Error while opening file\n", filename);