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-rw-r--r--apps/metadata/ape.c182
1 files changed, 0 insertions, 182 deletions
diff --git a/apps/metadata/ape.c b/apps/metadata/ape.c
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1/***************************************************************************
2 * __________ __ ___.
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
7 * \/ \/ \/ \/ \/
8 * $Id$
9 *
10 * Copyright (C) 2005 Dave Chapman
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
16 *
17 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
18 * KIND, either express or implied.
19 *
20 ****************************************************************************/
21#include <stdio.h>
22#include <string.h>
23#include <stdlib.h>
24#include <ctype.h>
25#include <inttypes.h>
26
27#include "system.h"
28#include "metadata.h"
29#include "metadata_common.h"
30#include "metadata_parsers.h"
31#include "structec.h"
32
33#define APETAG_HEADER_LENGTH 32
34#define APETAG_HEADER_FORMAT "8llll8"
35#define APETAG_ITEM_HEADER_FORMAT "ll"
36#define APETAG_ITEM_TYPE_MASK 3
37
38#ifdef HAVE_ALBUMART
39/* The AA header consists of the pseudo filename "Album Cover (Front).ext"
40 * whereas ".ext" is the file extension. For now ".jpg" and ".png" are
41 * supported by this APE metadata parser. Therefore the length is 22. */
42#define APETAG_AA_HEADER_LENGTH 22
43#endif
44
45struct apetag_header
46{
47 char id[8];
48 long version;
49 long length;
50 long item_count;
51 long flags;
52 char reserved[8];
53};
54
55struct apetag_item_header
56{
57 long length;
58 long flags;
59};
60
61/* Read the items in an APEV2 tag. Only looks for a tag at the end of a
62 * file. Returns true if a tag was found and fully read, false otherwise.
63 */
64bool read_ape_tags(int fd, struct mp3entry* id3)
65{
66 struct apetag_header header;
67
68 if ((lseek(fd, -APETAG_HEADER_LENGTH, SEEK_END) < 0)
69 || (ecread(fd, &header, 1, APETAG_HEADER_FORMAT, IS_BIG_ENDIAN)
70 != APETAG_HEADER_LENGTH)
71 || (memcmp(header.id, "APETAGEX", sizeof(header.id))))
72 {
73 return false;
74 }
75
76 if ((header.version == 2000) && (header.item_count > 0)
77 && (header.length > APETAG_HEADER_LENGTH))
78 {
79 char *buf = id3->id3v2buf;
80 unsigned int buf_remaining = sizeof(id3->id3v2buf)
81 + sizeof(id3->id3v1buf);
82 unsigned int tag_remaining = header.length - APETAG_HEADER_LENGTH;
83 int i;
84
85 if (lseek(fd, -header.length, SEEK_END) < 0)
86 {
87 return false;
88 }
89
90 for (i = 0; i < header.item_count; i++)
91 {
92 struct apetag_item_header item;
93 char name[TAG_NAME_LENGTH];
94 char value[TAG_VALUE_LENGTH];
95 long r;
96
97 if (tag_remaining < sizeof(item))
98 {
99 break;
100 }
101
102 if (ecread(fd, &item, 1, APETAG_ITEM_HEADER_FORMAT, IS_BIG_ENDIAN)
103 < (long) sizeof(item))
104 {
105 return false;
106 }
107
108 tag_remaining -= sizeof(item);
109 r = read_string(fd, name, sizeof(name), 0, tag_remaining);
110
111 if (r == -1)
112 {
113 return false;
114 }
115
116 tag_remaining -= r + item.length;
117
118 if ((item.flags & APETAG_ITEM_TYPE_MASK) == 0)
119 {
120 long len;
121
122 if (read_string(fd, value, sizeof(value), -1, item.length)
123 != item.length)
124 {
125 return false;
126 }
127
128 len = parse_tag(name, value, id3, buf, buf_remaining,
129 TAGTYPE_APE);
130 buf += len;
131 buf_remaining -= len;
132 }
133 else
134 {
135#ifdef HAVE_ALBUMART
136 if (strcasecmp(name, "cover art (front)") == 0)
137 {
138 /* Allow to read at least APETAG_AA_HEADER_LENGTH bytes. */
139 r = read_string(fd, name, sizeof(name), 0, APETAG_AA_HEADER_LENGTH);
140 if (r == -1)
141 {
142 return false;
143 }
144
145 /* Gather the album art format from the pseudo file name's ending. */
146 strcpy(name, name + strlen(name) - 4);
147 id3->albumart.type = AA_TYPE_UNKNOWN;
148 if (strcasecmp(name, ".jpg") == 0)
149 {
150 id3->albumart.type = AA_TYPE_JPG;
151 }
152 else if (strcasecmp(name, ".png") == 0)
153 {
154 id3->albumart.type = AA_TYPE_PNG;
155 }
156
157 /* Set the album art size and position. */
158 if (id3->albumart.type != AA_TYPE_UNKNOWN)
159 {
160 id3->albumart.pos = lseek(fd, 0, SEEK_CUR);
161 id3->albumart.size = item.length - r;
162 id3->has_embedded_albumart = true;
163 }
164
165 /* Seek back to this APE items begin. */
166 if (lseek(fd, -r, SEEK_CUR) < 0)
167 {
168 return false;
169 }
170 }
171#endif
172 /* Seek to the next APE item. */
173 if (lseek(fd, item.length, SEEK_CUR) < 0)
174 {
175 return false;
176 }
177 }
178 }
179 }
180
181 return true;
182}