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
|
// The authors have released ID3Lib as Public Domain (PD) and claim no copyright,
// patent or other intellectual property protection in this work. This means that
// it may be modified, redistributed and used in commercial and non-commercial
// software and hardware without restrictions. ID3Lib is distributed on an "AS IS"
// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.
//
// The ID3Lib authors encourage improvements and optimisations to be sent to the
// ID3Lib coordinator, currently Dirk Mahoney (dirk@id3.org). Approved
// submissions may be altered, and will be included and released under these terms.
//
// Mon Nov 23 18:34:01 1998
#include <stdio.h>
#include <string.h>
#include <memory.h>
#include "id3_tag.h"
#include "id3_misc_support.h"
void ID3_RemoveTrailingSpaces ( char *buffer, luint length )
{
for ( lsint i = length - 1; i > -1; i-- )
if ( buffer[ i ] == 0x20 )
buffer[ i ] = 0;
else
break;
return;
}
void ID3_Tag::ParseID3v1 ( void )
{
if ( fileHandle )
{
ID3V1_Tag temp;
// posn ourselves at 128 bytes from the end of the file
fseek ( fileHandle, -128, SEEK_END );
// read the next 128 bytes in;
fread ( &temp, 1, 128, fileHandle );
ID3_RemoveTrailingSpaces ( temp.title, sizeof ( temp.title ) );
ID3_RemoveTrailingSpaces ( temp.artist, sizeof ( temp.artist ) );
ID3_RemoveTrailingSpaces ( temp.album, sizeof ( temp.album ) );
if ( temp.comment[ 28 ] == 0 && temp.comment[ 29 ] != 0 )
ID3_RemoveTrailingSpaces ( temp.comment, sizeof ( temp.comment ) - 1 );
else
ID3_RemoveTrailingSpaces ( temp.comment, sizeof ( temp.comment ) );
// check to see if it was a tag
if ( memcmp ( temp.ID, "TAG", 3 ) == 0 )
{
// guess so, let's start checking the v2 tag for frames
// which are the equivalent of the v1 fields. When we
// come across a v1 field that has no current equivalent
// v2 frame, we create the frame, copy the data from the
// v1 frame and attach it to the tag
hasV1Tag = true;
extraBytes += sizeof ( ID3V1_Tag );
ID3_AddTitle ( this, temp.title );
ID3_AddArtist ( this, temp.artist );
ID3_AddAlbum ( this, temp.album );
// the YEAR field/frame
if ( Find ( ID3FID_YEAR ) == NULL && temp.year[ 0 ] != 0 )
{
ID3_Frame *yearFrame;
if ( yearFrame = new ID3_Frame )
{
char buff[ 5 ];
strncpy ( buff, temp.year, 4 );
buff[ 4 ] = 0;
yearFrame->SetID ( ID3FID_YEAR );
yearFrame->Field ( ID3FN_TEXT ) = buff;
AddFrame ( yearFrame, true );
}
else
ID3_THROW ( ID3E_NoMemory );
}
// the COMMENT field/frame
if ( Find ( ID3FID_COMMENT ) == NULL && strlen ( temp.comment ) > 0 )
{
ID3_Frame *commentFrame;
if ( commentFrame = new ID3_Frame )
{
commentFrame->SetID ( ID3FID_COMMENT );
commentFrame->Field ( ID3FN_LANGUAGE ) = "eng";
commentFrame->Field ( ID3FN_TEXT ) = temp.comment;
AddFrame ( commentFrame, true );
}
else
ID3_THROW ( ID3E_NoMemory );
}
// the TRACK field/frame
if ( temp.comment[ 28 ] == 0 && temp.comment[ 29 ] != 0 )
{
if ( Find ( ID3FID_TRACKNUM ) == NULL )
{
ID3_Frame *trackFrame;
if ( trackFrame = new ID3_Frame )
{
char buff[ 4 ];
sprintf ( buff, "%d", (luint) temp.comment[ 29 ] );
trackFrame->SetID ( ID3FID_TRACKNUM );
trackFrame->Field ( ID3FN_TEXT ) = buff;
AddFrame ( trackFrame, true );
}
else
ID3_THROW ( ID3E_NoMemory );
}
}
// the GENRE field/frame
if ( temp.genre != 255 )
{
if ( Find ( ID3FID_CONTENTTYPE ) == NULL )
{
ID3_Frame *genreFrame;
if ( genreFrame = new ID3_Frame )
{
char buff[ 6 ];
sprintf ( buff, "(%d)", (luint) temp.genre );
genreFrame->SetID ( ID3FID_CONTENTTYPE );
genreFrame->Field ( ID3FN_TEXT ) = buff;
AddFrame ( genreFrame, true );
}
else
ID3_THROW ( ID3E_NoMemory );
}
}
}
}
else
ID3_THROW ( ID3E_NoData );
return;
}
|
