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
123
124
125
126
127
128
129
130
131
132
133
|
<?php
/////////////////////////////////////////////////////////////////
/// getID3() by James Heinrich <info@getid3.org> //
// available at http://getid3.sourceforge.net //
// or http://www.getid3.org //
// also https://github.com/JamesHeinrich/getID3 //
/////////////////////////////////////////////////////////////////
// See readme.txt for more details //
/////////////////////////////////////////////////////////////////
// //
// module.audio.dsf.php //
// module for analyzing dsf/DSF Audio files //
// dependencies: module.tag.id3v2.php //
// ///
/////////////////////////////////////////////////////////////////
getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.tag.id3v2.php', __FILE__, true);
class getid3_dsf extends getid3_handler
{
public function Analyze() {
$info = &$this->getid3->info;
$info['fileformat'] = 'dsf';
$info['audio']['dataformat'] = 'dsf';
$info['audio']['lossless'] = true;
$info['audio']['bitrate_mode'] = 'cbr';
$this->fseek($info['avdataoffset']);
$dsfheader = $this->fread(28 + 12);
$headeroffset = 0;
$info['dsf']['dsd']['magic'] = substr($dsfheader, $headeroffset, 4);
$headeroffset += 4;
$magic = 'DSD ';
if ($info['dsf']['dsd']['magic'] != $magic) {
$info['error'][] = 'Expecting "'.getid3_lib::PrintHexBytes($magic).'" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes($info['dsf']['dsd']['magic']).'"';
unset($info['fileformat']);
unset($info['audio']);
unset($info['dsf']);
return false;
}
$info['dsf']['dsd']['dsd_chunk_size'] = getid3_lib::LittleEndian2Int(substr($dsfheader, $headeroffset, 8)); // should be 28
$headeroffset += 8;
$info['dsf']['dsd']['dsf_file_size'] = getid3_lib::LittleEndian2Int(substr($dsfheader, $headeroffset, 8));
$headeroffset += 8;
$info['dsf']['dsd']['meta_chunk_offset'] = getid3_lib::LittleEndian2Int(substr($dsfheader, $headeroffset, 8));
$headeroffset += 8;
$info['dsf']['fmt']['magic'] = substr($dsfheader, $headeroffset, 4);
$headeroffset += 4;
$magic = 'fmt ';
if ($info['dsf']['fmt']['magic'] != $magic) {
$info['error'][] = 'Expecting "'.getid3_lib::PrintHexBytes($magic).'" at offset '.$headeroffset.', found "'.getid3_lib::PrintHexBytes($info['dsf']['fmt']['magic']).'"';
return false;
}
$info['dsf']['fmt']['fmt_chunk_size'] = getid3_lib::LittleEndian2Int(substr($dsfheader, $headeroffset, 8)); // usually 52 bytes
$headeroffset += 8;
$dsfheader .= $this->fread($info['dsf']['fmt']['fmt_chunk_size'] - 12 + 12); // we have already read the entire DSD chunk, plus 12 bytes of FMT. We now want to read the size of FMT, plus 12 bytes into the next chunk to get magic and size.
if (strlen($dsfheader) != ($info['dsf']['dsd']['dsd_chunk_size'] + $info['dsf']['fmt']['fmt_chunk_size'] + 12)) {
$info['error'][] = 'Expecting '.($info['dsf']['dsd']['dsd_chunk_size'] + $info['dsf']['fmt']['fmt_chunk_size']).' bytes header, found '.strlen($dsfheader).' bytes';
return false;
}
$info['dsf']['fmt']['format_version'] = getid3_lib::LittleEndian2Int(substr($dsfheader, $headeroffset, 4)); // usually "1"
$headeroffset += 4;
$info['dsf']['fmt']['format_id'] = getid3_lib::LittleEndian2Int(substr($dsfheader, $headeroffset, 4)); // usually "0" = "DSD Raw"
$headeroffset += 4;
$info['dsf']['fmt']['channel_type_id'] = getid3_lib::LittleEndian2Int(substr($dsfheader, $headeroffset, 4));
$headeroffset += 4;
$info['dsf']['fmt']['channels'] = getid3_lib::LittleEndian2Int(substr($dsfheader, $headeroffset, 4));
$headeroffset += 4;
$info['dsf']['fmt']['sample_rate'] = getid3_lib::LittleEndian2Int(substr($dsfheader, $headeroffset, 4));
$headeroffset += 4;
$info['dsf']['fmt']['bits_per_sample'] = getid3_lib::LittleEndian2Int(substr($dsfheader, $headeroffset, 4));
$headeroffset += 4;
$info['dsf']['fmt']['sample_count'] = getid3_lib::LittleEndian2Int(substr($dsfheader, $headeroffset, 8));
$headeroffset += 8;
$info['dsf']['fmt']['channel_block_size'] = getid3_lib::LittleEndian2Int(substr($dsfheader, $headeroffset, 4));
$headeroffset += 4;
$info['dsf']['fmt']['reserved'] = getid3_lib::LittleEndian2Int(substr($dsfheader, $headeroffset, 4)); // zero-filled
$headeroffset += 4;
$info['dsf']['data']['magic'] = substr($dsfheader, $headeroffset, 4);
$headeroffset += 4;
$magic = 'data';
if ($info['dsf']['data']['magic'] != $magic) {
$info['error'][] = 'Expecting "'.getid3_lib::PrintHexBytes($magic).'" at offset '.$headeroffset.', found "'.getid3_lib::PrintHexBytes($info['dsf']['data']['magic']).'"';
return false;
}
$info['dsf']['data']['data_chunk_size'] = getid3_lib::LittleEndian2Int(substr($dsfheader, $headeroffset, 8));
$headeroffset += 8;
$info['avdataoffset'] = $headeroffset;
$info['avdataend'] = $info['avdataoffset'] + $info['dsf']['data']['data_chunk_size'];
if ($info['dsf']['dsd']['meta_chunk_offset'] > 0) {
$getid3_id3v2 = new getid3_id3v2($this->getid3);
$getid3_id3v2->StartingOffset = $info['dsf']['dsd']['meta_chunk_offset'];
$getid3_id3v2->Analyze();
unset($getid3_id3v2);
}
$info['dsf']['fmt']['channel_type'] = $this->DSFchannelTypeLookup($info['dsf']['fmt']['channel_type_id']);
$info['audio']['channelmode'] = $info['dsf']['fmt']['channel_type'];
$info['audio']['bits_per_sample'] = $info['dsf']['fmt']['bits_per_sample'];
$info['audio']['sample_rate'] = $info['dsf']['fmt']['sample_rate'];
$info['audio']['channels'] = $info['dsf']['fmt']['channels'];
$info['audio']['bitrate'] = $info['audio']['bits_per_sample'] * $info['audio']['sample_rate'] * $info['audio']['channels'];
$info['playtime_seconds'] = ($info['dsf']['data']['data_chunk_size'] * 8) / $info['audio']['bitrate'];
return true;
}
public static function DSFchannelTypeLookup($channel_type_id) {
static $DSFchannelTypeLookup = array(
// interleaving order:
1 => 'mono', // 1: Mono
2 => 'stereo', // 1: Front-Left; 2: Front-Right
3 => '3-channel', // 1: Front-Left; 2: Front-Right; 3: Center
4 => 'quad', // 1: Front-Left; 2: Front-Right; 3: Back-Left; 4: Back-Right
5 => '4-channel', // 1: Front-Left; 2: Front-Right; 3: Center; 4: Low-Frequency
6 => '5-channel', // 1: Front-Left; 2: Front-Right; 3: Center; 4: Back-Left 5: Back-Right
7 => '5.1', // 1: Front-Left; 2: Front-Right; 3: Center; 4: Low-Frequency; 5: Back-Left; 6: Back-Right
);
return (isset($DSFchannelTypeLookup[$channel_type_id]) ? $DSFchannelTypeLookup[$channel_type_id] : '');
}
}
|
