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/*
* This file is part of libextractor.
* (C) 2008, 2009 Toni Ruottu
*
* libextractor is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published
* by the Free Software Foundation; either version 2, or (at your
* option) any later version.
*
* libextractor is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with libextractor; see the file COPYING. If not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
*/
#include "platform.h"
#include "extractor.h"
#include "convert.h"
#define HEADER_SIZE 64
struct header
{
char magicid[17];
char title[20];
char something[1];
char tracker[20];
char version[2];
};
#define ADD(s,t) do { if (0 != proc (proc_cls, "xm", t, EXTRACTOR_METAFORMAT_UTF8, "text/plain", s, strlen(s)+1)) return 1; } while (0)
/* "extract" keyword from an Extended Module
*
* The XM module format description for XM files
* version $0104 that was written by Mr.H of Triton
* in 1994 was used, while this piece of software
* was originally written.
*
*/
int
EXTRACTOR_xm_extract (const unsigned char *data,
size_t size,
EXTRACTOR_MetaDataProcessor proc,
void *proc_cls,
const char *options)
{
char title[21];
char tracker[21];
char xmversion[8];
const struct header *head;
/* Check header size */
if (size < HEADER_SIZE)
return 0;
head = (const struct header *) data;
/* Check "magic" id bytes */
if (memcmp (head->magicid, "Extended Module: ", 17))
return 0;
ADD("audio/x-xm", EXTRACTOR_METATYPE_MIMETYPE);
/* Version of Tracker */
snprintf (xmversion,
sizeof(xmversion),
"%d.%d",
head->version[1],
head->version[0]);
ADD (xmversion, EXTRACTOR_METATYPE_FORMAT_VERSION);
/* Song title */
memcpy (&title, head->title, 20);
title[20] = '\0';
ADD (title, EXTRACTOR_METATYPE_TITLE);
/* software used for creating the data */
memcpy (&tracker, head->tracker, 20);
tracker[20] = '\0';
ADD (tracker, EXTRACTOR_METATYPE_CREATED_BY_SOFTWARE);
return 0;
}
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