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ffmpeg / cmdutils.c @ 24fddf48

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/*
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 * Various utilities for command line tools
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 * Copyright (c) 2000-2003 Fabrice Bellard
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg 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 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg 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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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#include <string.h>
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#include <stdlib.h>
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#include <errno.h>
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#include "avformat.h"
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#include "cmdutils.h"
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#include "avstring.h"
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#undef exit
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void show_help_options(const OptionDef *options, const char *msg, int mask, int value)
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{
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    const OptionDef *po;
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    int first;
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    first = 1;
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    for(po = options; po->name != NULL; po++) {
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        char buf[64];
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        if ((po->flags & mask) == value) {
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            if (first) {
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                printf("%s", msg);
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                first = 0;
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            }
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            av_strlcpy(buf, po->name, sizeof(buf));
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            if (po->flags & HAS_ARG) {
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                av_strlcat(buf, " ", sizeof(buf));
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                av_strlcat(buf, po->argname, sizeof(buf));
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            }
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            printf("-%-17s  %s\n", buf, po->help);
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        }
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    }
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}
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static const 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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            break;
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        po++;
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    }
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    return po;
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}
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void parse_options(int argc, char **argv, const OptionDef *options)
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{
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    const char *opt, *arg;
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    int optindex, handleoptions=1;
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    const OptionDef *po;
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    /* parse options */
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    optindex = 1;
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    while (optindex < argc) {
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        opt = argv[optindex++];
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        if (handleoptions && opt[0] == '-' && opt[1] != '\0') {
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          if (opt[1] == '-' && opt[2] == '\0') {
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            handleoptions = 0;
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            continue;
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          }
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            po= find_option(options, opt + 1);
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            if (!po->name)
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                po= find_option(options, "default");
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            if (!po->name) {
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unknown_opt:
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                fprintf(stderr, "%s: unrecognized option '%s'\n", argv[0], opt);
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                exit(1);
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            }
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            arg = NULL;
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            if (po->flags & HAS_ARG) {
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                arg = argv[optindex++];
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                if (!arg) {
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                    fprintf(stderr, "%s: missing argument for option '%s'\n", argv[0], opt);
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                    exit(1);
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                }
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            }
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            if (po->flags & OPT_STRING) {
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                char *str;
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                str = av_strdup(arg);
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                *po->u.str_arg = str;
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            } else if (po->flags & OPT_BOOL) {
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                *po->u.int_arg = 1;
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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_INT64) {
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                *po->u.int64_arg = strtoll(arg, (char **)NULL, 10);
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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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                    goto unknown_opt;
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            } else {
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                po->u.func_arg(arg);
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            }
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        } else {
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            parse_arg_file(opt);
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        }
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    }
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}
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void print_error(const char *filename, int err)
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{
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    switch(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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                filename);
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        break;
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    case AVERROR_INVALIDDATA:
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        fprintf(stderr, "%s: Error while parsing header\n", filename);
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        break;
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    case AVERROR_NOFMT:
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        fprintf(stderr, "%s: Unknown format\n", filename);
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        break;
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    case AVERROR(EIO):
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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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                filename);
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        break;
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    case AVERROR(ENOMEM):
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        fprintf(stderr, "%s: memory allocation error occured\n", filename);
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        break;
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    case AVERROR(ENOENT):
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        fprintf(stderr, "%s: no such file or directory\n", filename);
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        break;
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    default:
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        fprintf(stderr, "%s: Error while opening file\n", filename);
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        break;
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    }
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}