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author | Sean Bartell <wingedtachikoma@gmail.com> | 2011-06-24 01:25:21 -0400 |
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committer | Nils Wallménius <nils@rockbox.org> | 2012-03-18 12:00:39 +0100 |
commit | b5716df4cb2837bbbc42195cf1aefcf03e21d6a6 (patch) | |
tree | 130cd712e2e00893b6df9959a375a8d9523a1aca /lib/rbcodec/metadata/aiff.c | |
parent | 24bd9d5393dbe39a5c6194877bc00ede669b1d5d (diff) | |
download | rockbox-b5716df4cb2837bbbc42195cf1aefcf03e21d6a6.tar.gz rockbox-b5716df4cb2837bbbc42195cf1aefcf03e21d6a6.zip |
Build librbcodec with DSP and metadata.
All associated files are moved to /lib/rbcodec.
Change-Id: I572ddd2b8a996aae1e98c081d06b1ed356dce222
Diffstat (limited to 'lib/rbcodec/metadata/aiff.c')
-rw-r--r-- | lib/rbcodec/metadata/aiff.c | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/lib/rbcodec/metadata/aiff.c b/lib/rbcodec/metadata/aiff.c new file mode 100644 index 0000000000..654f37cf98 --- /dev/null +++ b/lib/rbcodec/metadata/aiff.c | |||
@@ -0,0 +1,108 @@ | |||
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 | |||
32 | #include "debug.h" | ||
33 | |||
34 | /* compressionType: AIFC QuickTime IMA ADPCM */ | ||
35 | #define AIFC_FORMAT_QT_IMA_ADPCM "ima4" | ||
36 | |||
37 | bool get_aiff_metadata(int fd, struct mp3entry* id3) | ||
38 | { | ||
39 | unsigned char buf[512]; | ||
40 | unsigned long numChannels = 0; | ||
41 | unsigned long numSampleFrames = 0; | ||
42 | unsigned long numbytes = 0; | ||
43 | bool is_aifc = false; | ||
44 | |||
45 | if ((lseek(fd, 0, SEEK_SET) < 0) || (read(fd, &buf[0], 12) < 12) || | ||
46 | (memcmp(&buf[0], "FORM", 4) != 0) || (memcmp(&buf[8], "AIF", 3) != 0) || | ||
47 | (!(is_aifc = (buf[11] == 'C')) && buf[11] != 'F')) | ||
48 | { | ||
49 | return false; | ||
50 | } | ||
51 | |||
52 | while (read(fd, &buf[0], 8) == 8) | ||
53 | { | ||
54 | size_t size = get_long_be(&buf[4]); /* chunkSize */ | ||
55 | |||
56 | if (memcmp(&buf[0], "SSND", 4) == 0) | ||
57 | { | ||
58 | numbytes = size - 8; | ||
59 | break; /* assume COMM was already read */ | ||
60 | } | ||
61 | |||
62 | /* odd chunk sizes must be padded */ | ||
63 | size += size & 1; | ||
64 | |||
65 | if (size > sizeof(buf)) | ||
66 | { | ||
67 | DEBUGF("AIFF \"%4.4s\" chunk too large (%zd > %zd)", | ||
68 | (char*) &buf[0], size, sizeof(buf)); | ||
69 | } | ||
70 | |||
71 | if (memcmp(&buf[0], "COMM", 4) == 0) | ||
72 | { | ||
73 | if (size > sizeof(buf) || read(fd, &buf[0], size) != (ssize_t)size) | ||
74 | return false; | ||
75 | |||
76 | numChannels = ((buf[0]<<8)|buf[1]); | ||
77 | |||
78 | numSampleFrames = get_long_be(&buf[2]); | ||
79 | |||
80 | /* sampleRate */ | ||
81 | id3->frequency = get_long_be(&buf[10]); | ||
82 | id3->frequency >>= (16+14-buf[9]); | ||
83 | |||
84 | /* save format infos */ | ||
85 | id3->bitrate = ((buf[6]<<8)|buf[7]) * numChannels * id3->frequency; | ||
86 | id3->bitrate /= 1000; | ||
87 | |||
88 | if (!is_aifc || memcmp(&buf[18], AIFC_FORMAT_QT_IMA_ADPCM, 4) != 0) | ||
89 | id3->length = ((int64_t) numSampleFrames * 1000) / id3->frequency; | ||
90 | else | ||
91 | { | ||
92 | /* QuickTime IMA ADPCM is 1block = 64 data for each channel */ | ||
93 | id3->length = ((int64_t) numSampleFrames * 64000LL) / id3->frequency; | ||
94 | } | ||
95 | |||
96 | id3->vbr = false; /* AIFF files are CBR */ | ||
97 | id3->filesize = filesize(fd); | ||
98 | } | ||
99 | else | ||
100 | { | ||
101 | /* skip chunk */ | ||
102 | if (lseek(fd, size, SEEK_CUR) < 0) | ||
103 | return false; | ||
104 | } | ||
105 | } | ||
106 | |||
107 | return numbytes && numChannels; | ||
108 | } | ||