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Diffstat (limited to 'apps/metadata/monkeys.c')
-rw-r--r-- | apps/metadata/monkeys.c | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/apps/metadata/monkeys.c b/apps/metadata/monkeys.c new file mode 100644 index 0000000000..bda3a01643 --- /dev/null +++ b/apps/metadata/monkeys.c | |||
@@ -0,0 +1,92 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Copyright (C) 2005 Dave Chapman | ||
11 | * | ||
12 | * All files in this archive are subject to the GNU General Public License. | ||
13 | * See the file COPYING in the source tree root for full license agreement. | ||
14 | * | ||
15 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
16 | * KIND, either express or implied. | ||
17 | * | ||
18 | ****************************************************************************/ | ||
19 | #include <stdio.h> | ||
20 | #include <string.h> | ||
21 | #include <stdlib.h> | ||
22 | #include <ctype.h> | ||
23 | #include <inttypes.h> | ||
24 | |||
25 | #include "system.h" | ||
26 | #include "id3.h" | ||
27 | #include "metadata_common.h" | ||
28 | |||
29 | bool get_monkeys_metadata(int fd, struct mp3entry* id3) | ||
30 | { | ||
31 | /* Use the trackname part of the id3 structure as a temporary buffer */ | ||
32 | unsigned char* buf = (unsigned char *)id3->path; | ||
33 | unsigned char* header; | ||
34 | bool rc = false; | ||
35 | uint32_t descriptorlength; | ||
36 | uint32_t totalsamples; | ||
37 | uint32_t blocksperframe, finalframeblocks, totalframes; | ||
38 | int fileversion; | ||
39 | |||
40 | lseek(fd, 0, SEEK_SET); | ||
41 | |||
42 | if (read(fd, buf, 4) < 4) | ||
43 | { | ||
44 | return rc; | ||
45 | } | ||
46 | |||
47 | if (memcmp(buf, "MAC ", 4) != 0) | ||
48 | { | ||
49 | return rc; | ||
50 | } | ||
51 | |||
52 | read(fd, buf + 4, MAX_PATH - 4); | ||
53 | |||
54 | fileversion = get_short_le(buf+4); | ||
55 | if (fileversion < 3970) | ||
56 | { | ||
57 | /* Not supported */ | ||
58 | return false; | ||
59 | } | ||
60 | |||
61 | if (fileversion >= 3980) | ||
62 | { | ||
63 | descriptorlength = get_long_le(buf+8); | ||
64 | |||
65 | header = buf + descriptorlength; | ||
66 | |||
67 | blocksperframe = get_long_le(header+4); | ||
68 | finalframeblocks = get_long_le(header+8); | ||
69 | totalframes = get_long_le(header+12); | ||
70 | id3->frequency = get_long_le(header+20); | ||
71 | } | ||
72 | else | ||
73 | { | ||
74 | /* v3.95 and later files all have a fixed framesize */ | ||
75 | blocksperframe = 73728 * 4; | ||
76 | |||
77 | finalframeblocks = get_long_le(buf+28); | ||
78 | totalframes = get_long_le(buf+24); | ||
79 | id3->frequency = get_long_le(buf+12); | ||
80 | } | ||
81 | |||
82 | id3->vbr = true; /* All FLAC files are VBR */ | ||
83 | id3->filesize = filesize(fd); | ||
84 | |||
85 | totalsamples = finalframeblocks; | ||
86 | if (totalframes > 1) | ||
87 | totalsamples += blocksperframe * (totalframes-1); | ||
88 | |||
89 | id3->length = ((int64_t) totalsamples * 1000) / id3->frequency; | ||
90 | id3->bitrate = (id3->filesize * 8) / id3->length; | ||
91 | return true; | ||
92 | } | ||