cmdutils.c 4.42 KB
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/*
 * Various utilities for command line tools
 * Copyright (c) 2000-2003 Fabrice Bellard
 *
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 * This file is part of FFmpeg.
 *
 * 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
 * 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
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * 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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#define HAVE_AV_CONFIG_H
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#include "avformat.h"
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#include "common.h"
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#include "cmdutils.h"

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void show_help_options(const OptionDef *options, const char *msg, int mask, int value)
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{
    const OptionDef *po;
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    int first;
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    first = 1;
    for(po = options; po->name != NULL; po++) {
        char buf[64];
        if ((po->flags & mask) == value) {
            if (first) {
                printf("%s", msg);
                first = 0;
            }
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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), " ");
                pstrcat(buf, sizeof(buf), po->argname);
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            }
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            printf("-%-17s  %s\n", buf, po->help);
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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) {
        if (!strcmp(name, po->name))
            break;
        po++;
    }
    return po;
}

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void parse_options(int argc, char **argv, const OptionDef *options)
{
    const char *opt, *arg;
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    int optindex, handleoptions;
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    const OptionDef *po;

    /* parse options */
    optindex = 1;
    while (optindex < argc) {
        opt = argv[optindex++];
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        if (handleoptions && opt[0] == '-' && opt[1] != '\0') {
          if (opt[1] == '-' && opt[2] == '\0') {
            handleoptions = 0;
            continue;
          }
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            po= find_option(options, opt + 1);
            if (!po->name)
                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);
                exit(1);
            }
            arg = NULL;
            if (po->flags & HAS_ARG) {
                arg = argv[optindex++];
                if (!arg) {
                    fprintf(stderr, "%s: missing argument for option '%s'\n", argv[0], opt);
                    exit(1);
                }
            }
            if (po->flags & OPT_STRING) {
                char *str;
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                str = av_strdup(arg);
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                *po->u.str_arg = str;
            } else if (po->flags & OPT_BOOL) {
                *po->u.int_arg = 1;
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OPT_INT  
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            } else if (po->flags & OPT_INT) {
                *po->u.int_arg = atoi(arg);
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            } else if (po->flags & OPT_FLOAT) {
                *po->u.float_arg = atof(arg);
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            } else if (po->flags & OPT_FUNC2) {
                if(po->u.func2_arg(opt+1, arg)<0)
                    goto unknown_opt;
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            } else {
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                po->u.func_arg(arg);
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            }
        } else {
            parse_arg_file(opt);
        }
    }
}

void print_error(const char *filename, int err)
{
    switch(err) {
    case AVERROR_NUMEXPECTED:
        fprintf(stderr, "%s: Incorrect image filename syntax.\n"
                "Use '%%d' to specify the image number:\n"
                "  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);
        break;
    case AVERROR_INVALIDDATA:
        fprintf(stderr, "%s: Error while parsing header\n", filename);
        break;
    case AVERROR_NOFMT:
        fprintf(stderr, "%s: Unknown format\n", filename);
        break;
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    case AVERROR_IO:
        fprintf(stderr, "%s: I/O error occured\n"
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                "Usually that means that input file is truncated and/or corrupted.\n",
                filename);
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        break;
    case AVERROR_NOMEM:
        fprintf(stderr, "%s: memory allocation error occured\n", filename);
        break;
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    default:
        fprintf(stderr, "%s: Error while opening file\n", filename);
        break;
    }
}