diff options
Diffstat (limited to 'apps/metadata/au.c')
-rw-r--r-- | apps/metadata/au.c | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/apps/metadata/au.c b/apps/metadata/au.c new file mode 100644 index 0000000000..1a7eef03c9 --- /dev/null +++ b/apps/metadata/au.c | |||
@@ -0,0 +1,122 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Copyright (C) 2010 Yoshihisa Uchida | ||
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 "logf.h" | ||
32 | |||
33 | static int bitspersamples[28] = { | ||
34 | 0, | ||
35 | 8, /* G.711 MULAW */ | ||
36 | 8, /* 8bit */ | ||
37 | 16, /* 16bit */ | ||
38 | 24, /* 24bit */ | ||
39 | 32, /* 32bit */ | ||
40 | 32, /* 32bit */ | ||
41 | 64, /* 64bit */ | ||
42 | 0, /* Fragmented sample data */ | ||
43 | 0, /* DSP program */ | ||
44 | 0, /* 8bit fixed point */ | ||
45 | 0, /* 16bit fixed point */ | ||
46 | 0, /* 24bit fixed point */ | ||
47 | 0, /* 32bit fixed point */ | ||
48 | 0, | ||
49 | 0, | ||
50 | 0, | ||
51 | 0, | ||
52 | 0, /* 16bit linear with emphasis */ | ||
53 | 0, /* 16bit linear compressed */ | ||
54 | 0, /* 16bit linear with emphasis and compression */ | ||
55 | 0, /* Music kit DSP commands */ | ||
56 | 0, | ||
57 | 0, /* G.721 MULAW */ | ||
58 | 0, /* G.722 */ | ||
59 | 0, /* G.723 3bit */ | ||
60 | 0, /* G.723 5bit */ | ||
61 | 8, /* G.711 ALAW */ | ||
62 | }; | ||
63 | |||
64 | static int get_au_bitspersample(unsigned int encoding) | ||
65 | { | ||
66 | if (encoding > 27) | ||
67 | return 0; | ||
68 | return bitspersamples[encoding]; | ||
69 | } | ||
70 | |||
71 | bool get_au_metadata(int fd, struct mp3entry* id3) | ||
72 | { | ||
73 | /* Use the trackname part of the id3 structure as a temporary buffer */ | ||
74 | unsigned char* buf = (unsigned char *)id3->path; | ||
75 | unsigned long totalsamples = 0; | ||
76 | unsigned long channels = 0; | ||
77 | unsigned long bitspersample = 0; | ||
78 | unsigned long numbytes = 0; | ||
79 | int read_bytes; | ||
80 | int offset; | ||
81 | |||
82 | id3->vbr = false; /* All Sun audio files are CBR */ | ||
83 | id3->filesize = filesize(fd); | ||
84 | |||
85 | if ((lseek(fd, 0, SEEK_SET) < 0) || ((read_bytes = read(fd, buf, 24)) < 0)) | ||
86 | return false; | ||
87 | |||
88 | if (read_bytes < 24 || (memcmp(buf, ".snd", 4) != 0)) | ||
89 | { | ||
90 | /* no header */ | ||
91 | numbytes = id3->filesize; | ||
92 | bitspersample = 8; | ||
93 | id3->frequency = 8000; | ||
94 | channels = 1; | ||
95 | } | ||
96 | else | ||
97 | { | ||
98 | /* data offset */ | ||
99 | offset = get_long_be(buf + 4); | ||
100 | if (offset < 24) | ||
101 | { | ||
102 | DEBUGF("CODEC_ERROR: sun audio offset size is small: %d\n", offset); | ||
103 | return false; | ||
104 | } | ||
105 | /* data size */ | ||
106 | numbytes = get_long_be(buf + 8); | ||
107 | if (numbytes == (uint32_t)0xffffffff) | ||
108 | numbytes = id3->filesize - offset; | ||
109 | /* bitspersample */ | ||
110 | bitspersample = get_au_bitspersample(get_long_be(buf + 12)); | ||
111 | /* sample rate */ | ||
112 | id3->frequency = get_long_be(buf + 16); | ||
113 | channels = get_long_be(buf + 20); | ||
114 | } | ||
115 | |||
116 | totalsamples = numbytes / ((((bitspersample - 1) / 8) + 1) * channels); | ||
117 | |||
118 | /* Calculate track length (in ms) and estimate the bitrate (in kbit/s) */ | ||
119 | id3->length = ((int64_t) totalsamples * 1000) / id3->frequency; | ||
120 | |||
121 | return true; | ||
122 | } | ||