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
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
/*
* This file is part of libextractor.
* (C) 2006 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 0x80
/* 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[5];
char nsfversion;
char songs;
char firstsong;
UINT16 loadaddr;
UINT16 initaddr;
UINT16 playaddr;
char title[32];
char artist[32];
char copyright[32];
UINT16 ntscspeed;
char bankswitch[8];
UINT16 palspeed;
char tvflags;
char chipflags;
};
static struct EXTRACTOR_Keywords *addkword
(EXTRACTOR_KeywordList * oldhead,
const char *phrase, EXTRACTOR_KeywordType type)
{
EXTRACTOR_KeywordList *keyword;
keyword = malloc (sizeof (EXTRACTOR_KeywordList));
keyword->next = oldhead;
keyword->keyword = strdup (phrase);
keyword->keywordType = type;
return (keyword);
}
/* "extract" keyword from a Nes Sound Format file
*
* NSF specification version 1.61 was used,
* while this piece of software was originally
* written.
*
*/
struct EXTRACTOR_Keywords *libextractor_nsf_extract
(const char *filename,
char *data, size_t size, struct EXTRACTOR_Keywords *prev)
{
char album[33];
char artist[33];
char copyright[33];
char songs[32];
char startingsong[32];
char nsfversion[32];
struct header *head;
/* Check header size */
if (size < HEADER_SIZE)
{
return (prev);
}
head = (struct header *) data;
/* Check "magic" id bytes */
if (memcmp (head->magicid, "NESM\x1a", 5))
{
return (prev);
}
/* Mime-type */
prev = addkword (prev, "audio/x-nsf", EXTRACTOR_MIMETYPE);
/* Version of NSF format */
sprintf (nsfversion, "%d", head->nsfversion);
prev = addkword (prev, nsfversion, EXTRACTOR_FORMAT_VERSION);
/* Get song count */
sprintf (songs, "%d", head->songs);
prev = addkword (prev, songs, EXTRACTOR_SONG_COUNT);
/* Get number of the first song to be played */
sprintf (startingsong, "%d", head->firstsong);
prev = addkword (prev, startingsong, EXTRACTOR_STARTING_SONG);
/* name, artist, copyright fields */
memcpy (&album, head->title, 32);
memcpy (&artist, head->artist, 32);
memcpy (©right, head->copyright, 32);
album[32] = '\0';
artist[32] = '\0';
copyright[32] = '\0';
prev = addkword (prev, album, EXTRACTOR_ALBUM);
prev = addkword (prev, artist, EXTRACTOR_ARTIST);
prev = addkword (prev, copyright, EXTRACTOR_COPYRIGHT);
/* PAL or NTSC */
if (head->tvflags & DUAL_FLAG)
{
prev = addkword (prev, "PAL/NTSC", EXTRACTOR_TELEVISION_SYSTEM);
}
else
{
if (head->tvflags & PAL_FLAG)
{
prev = addkword (prev, "PAL", EXTRACTOR_TELEVISION_SYSTEM);
}
else
{
prev = addkword (prev, "NTSC", EXTRACTOR_TELEVISION_SYSTEM);
}
}
/* Detect Extra Sound Chips needed to play the files */
if (head->chipflags & VRCVI_FLAG)
{
prev = addkword (prev, "VRCVI", EXTRACTOR_HARDWARE_DEPENDENCY);
}
if (head->chipflags & VRCVII_FLAG)
{
prev = addkword (prev, "VRCVII", EXTRACTOR_HARDWARE_DEPENDENCY);
}
if (head->chipflags & FDS_FLAG)
{
prev = addkword (prev, "FDS Sound", EXTRACTOR_HARDWARE_DEPENDENCY);
}
if (head->chipflags & MMC5_FLAG)
{
prev = addkword (prev, "MMC5 audio", EXTRACTOR_HARDWARE_DEPENDENCY);
}
if (head->chipflags & NAMCO_FLAG)
{
prev = addkword (prev, "Namco 106", EXTRACTOR_HARDWARE_DEPENDENCY);
}
if (head->chipflags & SUNSOFT_FLAG)
{
prev = addkword (prev, "Sunsoft FME-07", EXTRACTOR_HARDWARE_DEPENDENCY);
}
return (prev);
}
|
