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/*
* This file is part of libextractor.
* (C) 2007, 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 0x04
/* television system flags */
#define PAL_FLAG 0x01
#define DUAL_FLAG 0x02
/* sound chip flags */
#define VRCVI_FLAG 0x01
#define VRCVII_FLAG 0x02
#define FDS_FLAG 0x04
#define MMC5_FLAG 0x08
#define NAMCO_FLAG 0x10
#define SUNSOFT_FLAG 0x20
#define UINT16 unsigned short
struct header
{
char magicid[4];
};
struct infochunk
{
UINT16 loadaddr;
UINT16 initaddr;
UINT16 playaddr;
char tvflags;
char chipflags;
char songs;
char firstsong;
};
static int
nsfeuint (const char *data)
{
int i;
int value = 0;
for (i = 3; i > 0; i--)
{
value += (unsigned char) data[i];
value *= 0x100;
}
value += (unsigned char) data[0];
return value;
}
static char *
nsfestring (const char *data, size_t size)
{
char *s;
size_t length;
length = 0;
while ( (length < size) &&
(data[length] != '\0') )
length++;
s = malloc (length + 1);
strncpy (s, data, length);
s[strlen (data)] = '\0';
return s;
}
#define ADD(s,t) do { if (0 != proc (proc_cls, "nsfe", t, EXTRACTOR_METAFORMAT_UTF8, "text/plain", s, strlen(s)+1)) return 1; } while (0)
#define ADDF(s,t) do { if (0 != proc (proc_cls, "nsfe", t, EXTRACTOR_METAFORMAT_UTF8, "text/plain", s, strlen(s)+1)) { free(s); return 1; } free (s); } while (0)
static int
libextractor_nsfe_info_extract(const char *data,
size_t size,
EXTRACTOR_MetaDataProcessor proc,
void *proc_cls)
{
const struct infochunk *ichunk;
char songs[32];
if (size < 8)
return 0;
ichunk = (const struct infochunk *) data;
if (ichunk->tvflags & DUAL_FLAG)
{
ADD ("PAL/NTSC", EXTRACTOR_METATYPE_BROADCAST_TELEVISION_SYSTEM);
}
else
{
if (ichunk->tvflags & PAL_FLAG)
ADD ("PAL", EXTRACTOR_METATYPE_BROADCAST_TELEVISION_SYSTEM);
else
ADD ("NTSC", EXTRACTOR_METATYPE_BROADCAST_TELEVISION_SYSTEM);
}
if (ichunk->chipflags & VRCVI_FLAG)
ADD ("VRCVI", EXTRACTOR_METATYPE_TARGET_ARCHITECTURE);
if (ichunk->chipflags & VRCVII_FLAG)
ADD ("VRCVII", EXTRACTOR_METATYPE_TARGET_ARCHITECTURE);
if (ichunk->chipflags & FDS_FLAG)
ADD ("FDS Sound", EXTRACTOR_METATYPE_TARGET_ARCHITECTURE);
if (ichunk->chipflags & MMC5_FLAG)
ADD ("MMC5 audio", EXTRACTOR_METATYPE_TARGET_ARCHITECTURE);
if (ichunk->chipflags & NAMCO_FLAG)
ADD ("Namco 106", EXTRACTOR_METATYPE_TARGET_ARCHITECTURE);
if (ichunk->chipflags & SUNSOFT_FLAG)
ADD ("Sunsoft FME-07", EXTRACTOR_METATYPE_TARGET_ARCHITECTURE);
if (size < 9)
{
ADD ("1", EXTRACTOR_METATYPE_SONG_COUNT);
return 0;
}
snprintf (songs,
sizeof(songs),
"%d",
ichunk->songs);
ADD (songs, EXTRACTOR_METATYPE_SONG_COUNT);
return 0;
}
static int
libextractor_nsfe_tlbl_extract(const char *data,
size_t size,
EXTRACTOR_MetaDataProcessor proc,
void *proc_cls)
{
char *title;
ssize_t left;
size_t length;
for (left = size; left > 0; left -= length)
{
title = nsfestring (&data[size - left], left);
length = strlen (title) + 1;
ADDF (title, EXTRACTOR_METATYPE_TITLE);
}
return 0;
}
static int
libextractor_nsfe_auth_extract (const char *data, size_t size,
EXTRACTOR_MetaDataProcessor proc,
void *proc_cls)
{
char *album;
char *artist;
char *copyright;
char *ripper;
int left = size;
if (left < 1)
return 0;
album = nsfestring (&data[size - left], left);
left -= (strlen (album) + 1);
ADDF (album, EXTRACTOR_METATYPE_ALBUM);
if (left < 1)
return 0;
artist = nsfestring (&data[size - left], left);
left -= (strlen (artist) + 1);
ADDF (artist, EXTRACTOR_METATYPE_ARTIST);
if (left < 1)
return 0;
copyright = nsfestring (&data[size - left], left);
left -= (strlen (copyright) + 1);
ADDF (copyright, EXTRACTOR_METATYPE_COPYRIGHT);
if (left < 1)
return 0;
ripper = nsfestring (&data[size - left], left);
ADDF (ripper, EXTRACTOR_METATYPE_RIPPER);
return 0;
}
/* "extract" keyword from an Extended Nintendo Sound Format file
*
* NSFE specification revision 2 (Sep. 3, 2003)
* was used, while this piece of software was
* originally written.
*
*/
int
EXTRACTOR_nsfe_extract (const char *data,
size_t size,
EXTRACTOR_MetaDataProcessor proc,
void *proc_cls,
const char *options)
{
const struct header *head;
int i;
char chunkid[5] = " ";
int ret;
if (size < HEADER_SIZE)
return 0;
head = (const struct header *) data;
if (memcmp (head->magicid, "NSFE", 4))
return 0;
ADD ("audio/x-nsfe", EXTRACTOR_METATYPE_MIMETYPE);
i = 4; /* Jump over magic id */
ret = 0;
while (i + 7 < size && strncmp (chunkid, "NEND", 4)) /* CHECK */
{
unsigned int chunksize = nsfeuint (&data[i]);
i += 4; /* Jump over chunk size */
memcpy (&chunkid, data + i, 4);
chunkid[4] = '\0';
i += 4; /* Jump over chunk id */
if (!strncmp (chunkid, "INFO", 4))
ret = libextractor_nsfe_info_extract (data + i, chunksize, proc, proc_cls);
else if (!strncmp (chunkid, "auth", 4))
ret = libextractor_nsfe_auth_extract (data + i, chunksize, proc, proc_cls);
else if (!strncmp (chunkid, "tlbl", 4))
ret = libextractor_nsfe_tlbl_extract (data + i, chunksize, proc, proc_cls);
/* Ignored chunks: DATA, NEND, plst, time, fade, BANK */
i += chunksize;
if (ret != 0)
break;
}
return ret;
}
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