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
|
/* Copyright 2005 Jan Schmidt <thaytan@mad.scientist.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __ID3TAGS_H__
#define __ID3TAGS_H__
#include <gst/gst.h>
G_BEGIN_DECLS
/* private tag for storing unprocessed ID3v2 frames */
#define GST_ID3_DEMUX_TAG_ID3V2_FRAME "private-id3v2-frame"
#define ID3V1_TAG_SIZE 128
#define ID3V2_MARK_SIZE 3
#define ID3V2_HDR_SIZE 10
typedef enum {
ID3TAGS_MORE_DATA,
ID3TAGS_READ_TAG,
ID3TAGS_BROKEN_TAG
} ID3TagsResult;
/* From id3tags.c */
guint id3demux_calc_id3v2_tag_size (GstBuffer * buf);
ID3TagsResult id3demux_read_id3v2_tag (GstBuffer *buffer, guint *id3v2_size,
GstTagList **tags);
guint read_synch_uint (const guint8 * data, guint size);
/* Things shared by id3tags.c and id3v2frames.c */
#define ID3V2_VERSION 0x0400
#define ID3V2_VER_MAJOR(v) ((v) >> 8)
#define ID3V2_VER_MINOR(v) ((v) & 0xff)
typedef struct {
guint16 version;
guint8 flags;
guint32 size;
guint8 *frame_data;
guint32 frame_data_size;
guint32 ext_hdr_size;
guint8 ext_flag_bytes;
guint8 *ext_flag_data;
} ID3v2Header;
typedef struct {
ID3v2Header hdr;
GstBuffer *buffer;
GstTagList *tags;
/* Current frame decoding */
guint cur_frame_size;
gchar *frame_id;
guint16 frame_flags;
guint8 *parse_data;
guint parse_size;
/* To collect day/month from obsolete TDAT frame if it exists */
guint pending_month;
guint pending_day;
} ID3TagsWorking;
enum {
ID3V2_HDR_FLAG_UNSYNC = 0x80,
ID3V2_HDR_FLAG_EXTHDR = 0x40,
ID3V2_HDR_FLAG_EXPERIMENTAL = 0x20,
ID3V2_HDR_FLAG_FOOTER = 0x10
};
enum {
ID3V2_EXT_FLAG_UPDATE = 0x80,
ID3V2_EXT_FLAG_CRC = 0x40,
ID3V2_EXT_FLAG_RESTRICTED = 0x20
};
enum {
ID3V2_FRAME_STATUS_FRAME_ALTER_PRESERVE = 0x4000,
ID3V2_FRAME_STATUS_FILE_ALTER_PRESERVE = 0x2000,
ID3V2_FRAME_STATUS_READONLY = 0x1000,
ID3V2_FRAME_FORMAT_GROUPING_ID = 0x0040,
ID3V2_FRAME_FORMAT_COMPRESSION = 0x0008,
ID3V2_FRAME_FORMAT_ENCRYPTION = 0x0004,
ID3V2_FRAME_FORMAT_UNSYNCHRONISATION = 0x0002,
ID3V2_FRAME_FORMAT_DATA_LENGTH_INDICATOR = 0x0001
};
#define ID3V2_3_FRAME_FLAGS_MASK \
(ID3V2_FRAME_STATUS_FRAME_ALTER_PRESERVE | \
ID3V2_FRAME_STATUS_FILE_ALTER_PRESERVE | \
ID3V2_FRAME_STATUS_READONLY | \
ID3V2_FRAME_FORMAT_GROUPING_ID | \
ID3V2_FRAME_FORMAT_COMPRESSION | \
ID3V2_FRAME_FORMAT_ENCRYPTION)
/* From id3v2frames.c */
gboolean id3demux_id3v2_parse_frame (ID3TagsWorking *work);
guint8 * id3demux_ununsync_data (const guint8 * unsync_data, guint32 * size);
G_END_DECLS
#endif
|
