1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
|
/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2005 Dave Chapman
*
* This program 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
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <inttypes.h>
#include "system.h"
#include "metadata.h"
#include <string-extra.h>
#include "metadata_common.h"
#include "metadata_parsers.h"
#include "rbunicode.h"
#define MODULEHEADERSIZE 0x438
bool get_mod_metadata(int fd, struct mp3entry* id3)
{
/* Use the trackname part of the id3 structure as a temporary buffer */
unsigned char *buf = id3->id3v2buf;
unsigned char id[4];
bool is_mod_file = false;
/* Seek to file begin */
if (lseek(fd, 0, SEEK_SET) < 0)
return false;
/* Use id3v2buf as buffer for the track name */
if (read(fd, buf, sizeof(id3->id3v2buf)) < (ssize_t)sizeof(id3->id3v2buf))
return false;
/* Seek to MOD ID position */
if (lseek(fd, MODULEHEADERSIZE, SEEK_SET) < 0)
return false;
/* Read MOD ID */
if (read(fd, id, sizeof(id)) < (ssize_t)sizeof(id))
return false;
/* Mod type checking based on MikMod */
/* Protracker and variants */
if ((!memcmp(id, "M.K.", 4)) || (!memcmp(id, "M!K!", 4))) {
is_mod_file = true;
}
/* Star Tracker */
if (((!memcmp(id, "FLT", 3)) || (!memcmp(id, "EXO", 3))) &&
(isdigit(id[3]))) {
char numchn = id[3] - '0';
if (numchn == 4 || numchn == 8)
is_mod_file = true;
}
/* Oktalyzer (Amiga) */
if (!memcmp(id, "OKTA", 4)) {
is_mod_file = true;
}
/* Oktalyser (Atari) */
if (!memcmp(id, "CD81", 4)) {
is_mod_file = true;
}
/* Fasttracker */
if ((!memcmp(id + 1, "CHN", 3)) && (isdigit(id[0]))) {
is_mod_file = true;
}
/* Fasttracker or Taketracker */
if (((!memcmp(id + 2, "CH", 2)) || (!memcmp(id + 2, "CN", 2)))
&& (isdigit(id[0])) && (isdigit(id[1]))) {
is_mod_file = true;
}
/* Don't try to play if we can't find a known mod type
* (there are mod files which have nothing to do with music) */
if (!is_mod_file)
return false;
id3->title = id3->id3v2buf; /* Point title to previous read ID3 buffer. */
id3->bitrate = filesize(fd)/1024; /* size in kb */
id3->frequency = 44100;
id3->length = 120*1000;
id3->vbr = false;
id3->filesize = filesize(fd);
return true;
}
|
