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* Various utilities for command line tools
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* Copyright (c) 2000-2003 Fabrice Bellard
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#define HAVE_AV_CONFIG_H
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void show_help_options(const OptionDef *options, const char *msg, int mask, int value)
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for(po = options; po->name != NULL; po++) {
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if ((po->flags & mask) == value) {
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pstrcpy(buf, sizeof(buf), po->name);
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if (po->flags & HAS_ARG) {
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pstrcat(buf, sizeof(buf), " ");
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pstrcat(buf, sizeof(buf), po->argname);
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printf("-%-17s %s\n", buf, po->help);
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static OptionDef* find_option(const OptionDef *po, const char *name){
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while (po->name != NULL) {
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if (!strcmp(name, po->name))
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void parse_options(int argc, char **argv, const OptionDef *options)
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const char *opt, *arg;
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while (optindex < argc) {
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opt = argv[optindex++];
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if (opt[0] == '-' && opt[1] != '\0') {
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po= find_option(options, opt + 1);
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po= find_option(options, "default");
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fprintf(stderr, "%s: unrecognized option '%s'\n", argv[0], opt);
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if (po->flags & HAS_ARG) {
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arg = argv[optindex++];
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fprintf(stderr, "%s: missing argument for option '%s'\n", argv[0], opt);
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if (po->flags & OPT_STRING) {
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} else if (po->flags & OPT_BOOL) {
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} else if (po->flags & OPT_INT) {
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*po->u.int_arg = atoi(arg);
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} else if (po->flags & OPT_FLOAT) {
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*po->u.float_arg = atof(arg);
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} else if (po->flags & OPT_FUNC2) {
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if(po->u.func2_arg(opt+1, arg)<0)
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void print_error(const char *filename, int err)
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case AVERROR_NUMEXPECTED:
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fprintf(stderr, "%s: Incorrect image filename syntax.\n"
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"Use '%%d' to specify the image number:\n"
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" for img1.jpg, img2.jpg, ..., use 'img%%d.jpg';\n"
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" for img001.jpg, img002.jpg, ..., use 'img%%03d.jpg'.\n",
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case AVERROR_INVALIDDATA:
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fprintf(stderr, "%s: Error while parsing header\n", filename);
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fprintf(stderr, "%s: Unknown format\n", filename);
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fprintf(stderr, "%s: I/O error occured\n"
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"Usually that means that input file is truncated and/or corrupted.\n",
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fprintf(stderr, "%s: memory allocation error occured\n", filename);
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fprintf(stderr, "%s: Error while opening file\n", filename);