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
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
|
<?php
/////////////////////////////////////////////////////////////////
/// getID3() by James Heinrich <info@getid3.org> //
// available at https://github.com/JamesHeinrich/getID3 //
// or https://www.getid3.org //
// or http://getid3.sourceforge.net //
// see readme.txt for more details //
/////////////////////////////////////////////////////////////////
// //
// module.audio.dsdiff.php //
// module for analyzing Direct Stream Digital Interchange //
// File Format (DSDIFF) files //
// dependencies: NONE //
// ///
/////////////////////////////////////////////////////////////////
if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers
exit;
}
class getid3_dsdiff extends getid3_handler
{
/**
* @return bool
*/
public function Analyze() {
$info = &$this->getid3->info;
$this->fseek($info['avdataoffset']);
$DSDIFFheader = $this->fread(4);
// https://dsd-guide.com/sites/default/files/white-papers/DSDIFF_1.5_Spec.pdf
if (substr($DSDIFFheader, 0, 4) != 'FRM8') {
$this->error('Expecting "FRM8" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes(substr($DSDIFFheader, 0, 4)).'"');
return false;
}
unset($DSDIFFheader);
$this->fseek($info['avdataoffset']);
$info['encoding'] = 'ISO-8859-1'; // not certain, but assumed
$info['fileformat'] = 'dsdiff';
$info['mime_type'] = 'audio/dsd';
$info['audio']['dataformat'] = 'dsdiff';
$info['audio']['bitrate_mode'] = 'cbr';
$info['audio']['bits_per_sample'] = 1;
$info['dsdiff'] = array();
$thisChunk = null;
while (!$this->feof() && ($ChunkHeader = $this->fread(12))) {
if (strlen($ChunkHeader) < 12) {
$this->error('Expecting chunk header at offset '.(isset($thisChunk['offset']) ? $thisChunk['offset'] : 'N/A').', found insufficient data in file, aborting parsing');
break;
}
$thisChunk = array();
$thisChunk['offset'] = $this->ftell() - 12;
$thisChunk['name'] = substr($ChunkHeader, 0, 4);
if (!preg_match('#^[\\x21-\\x7E]+ *$#', $thisChunk['name'])) {
// "a concatenation of four printable ASCII characters in the range ' ' (space, 0x20) through '~'(0x7E). Space (0x20) cannot precede printing characters; trailing spaces are allowed."
$this->error('Invalid chunk name "'.$thisChunk['name'].'" ('.getid3_lib::PrintHexBytes($thisChunk['name']).') at offset '.$thisChunk['offset'].', aborting parsing');
}
$thisChunk['size'] = getid3_lib::BigEndian2Int(substr($ChunkHeader, 4, 8));
$datasize = $thisChunk['size'] + ($thisChunk['size'] % 2); // "If the data is an odd number of bytes in length, a pad byte must be added at the end. The pad byte is not included in ckDataSize."
switch ($thisChunk['name']) {
case 'FRM8':
$thisChunk['form_type'] = $this->fread(4);
if ($thisChunk['form_type'] != 'DSD ') {
$this->error('Expecting "DSD " at offset '.($this->ftell() - 4).', found "'.getid3_lib::PrintHexBytes($thisChunk['form_type']).'", aborting parsing');
break 2;
}
// do nothing further, prevent skipping subchunks
break;
case 'PROP': // PROPerty chunk
$thisChunk['prop_type'] = $this->fread(4);
if ($thisChunk['prop_type'] != 'SND ') {
$this->error('Expecting "SND " at offset '.($this->ftell() - 4).', found "'.getid3_lib::PrintHexBytes($thisChunk['prop_type']).'", aborting parsing');
break 2;
}
// do nothing further, prevent skipping subchunks
break;
case 'DIIN': // eDIted master INformation chunk
// do nothing, just prevent skipping subchunks
break;
case 'FVER': // Format VERsion chunk
if ($thisChunk['size'] == 4) {
$FVER = $this->fread(4);
$info['dsdiff']['format_version'] = ord($FVER[0]).'.'.ord($FVER[1]).'.'.ord($FVER[2]).'.'.ord($FVER[3]);
unset($FVER);
} else {
$this->warning('Expecting "FVER" chunk to be 4 bytes, found '.$thisChunk['size'].' bytes, skipping chunk');
$this->fseek($datasize, SEEK_CUR);
}
break;
case 'FS ': // sample rate chunk
if ($thisChunk['size'] == 4) {
$info['dsdiff']['sample_rate'] = getid3_lib::BigEndian2Int($this->fread(4));
$info['audio']['sample_rate'] = $info['dsdiff']['sample_rate'];
} else {
$this->warning('Expecting "FVER" chunk to be 4 bytes, found '.$thisChunk['size'].' bytes, skipping chunk');
$this->fseek($datasize, SEEK_CUR);
}
break;
case 'CHNL': // CHaNneLs chunk
$thisChunk['num_channels'] = getid3_lib::BigEndian2Int($this->fread(2));
if ($thisChunk['num_channels'] == 0) {
$this->warning('channel count should be greater than zero, skipping chunk');
$this->fseek($datasize - 2, SEEK_CUR);
}
for ($i = 0; $i < $thisChunk['num_channels']; $i++) {
$thisChunk['channels'][$i] = $this->fread(4);
}
$info['audio']['channels'] = $thisChunk['num_channels'];
break;
case 'CMPR': // CoMPRession type chunk
$thisChunk['compression_type'] = $this->fread(4);
$info['audio']['dataformat'] = trim($thisChunk['compression_type']);
$humanReadableByteLength = getid3_lib::BigEndian2Int($this->fread(1));
$thisChunk['compression_name'] = $this->fread($humanReadableByteLength);
if (($humanReadableByteLength % 2) == 0) {
// need to seek to multiple of 2 bytes, human-readable string length is only one byte long so if the string is an even number of bytes we need to seek past a padding byte after the string
$this->fseek(1, SEEK_CUR);
}
unset($humanReadableByteLength);
break;
case 'ABSS': // ABSolute Start time chunk
$ABSS = $this->fread(8);
$info['dsdiff']['absolute_start_time']['hours'] = getid3_lib::BigEndian2Int(substr($ABSS, 0, 2));
$info['dsdiff']['absolute_start_time']['minutes'] = getid3_lib::BigEndian2Int(substr($ABSS, 2, 1));
$info['dsdiff']['absolute_start_time']['seconds'] = getid3_lib::BigEndian2Int(substr($ABSS, 3, 1));
$info['dsdiff']['absolute_start_time']['samples'] = getid3_lib::BigEndian2Int(substr($ABSS, 4, 4));
unset($ABSS);
break;
case 'LSCO': // LoudSpeaker COnfiguration chunk
// 0 = 2-channel stereo set-up
// 3 = 5-channel set-up according to ITU-R BS.775-1 [ITU]
// 4 = 6-channel set-up, 5-channel set-up according to ITU-R BS.775-1 [ITU], plus additional Low Frequency Enhancement (LFE) loudspeaker. Also known as "5.1 configuration"
// 65535 = Undefined channel set-up
$thisChunk['loundspeaker_config_id'] = getid3_lib::BigEndian2Int($this->fread(2));
break;
case 'COMT': // COMmenTs chunk
$thisChunk['num_comments'] = getid3_lib::BigEndian2Int($this->fread(2));
for ($i = 0; $i < $thisChunk['num_comments']; $i++) {
$thisComment = array();
$COMT = $this->fread(14);
$thisComment['creation_year'] = getid3_lib::BigEndian2Int(substr($COMT, 0, 2));
$thisComment['creation_month'] = getid3_lib::BigEndian2Int(substr($COMT, 2, 1));
$thisComment['creation_day'] = getid3_lib::BigEndian2Int(substr($COMT, 3, 1));
$thisComment['creation_hour'] = getid3_lib::BigEndian2Int(substr($COMT, 4, 1));
$thisComment['creation_minute'] = getid3_lib::BigEndian2Int(substr($COMT, 5, 1));
$thisComment['comment_type_id'] = getid3_lib::BigEndian2Int(substr($COMT, 6, 2));
$thisComment['comment_ref_id'] = getid3_lib::BigEndian2Int(substr($COMT, 8, 2));
$thisComment['string_length'] = getid3_lib::BigEndian2Int(substr($COMT, 10, 4));
$thisComment['comment_text'] = $this->fread($thisComment['string_length']);
if ($thisComment['string_length'] % 2) {
// commentText[] is the description of the Comment. This text must be padded with a byte at the end, if needed, to make it an even number of bytes long. This pad byte, if present, is not included in count.
$this->fseek(1, SEEK_CUR);
}
$thisComment['comment_type'] = $this->DSDIFFcmtType($thisComment['comment_type_id']);
$thisComment['comment_reference'] = $this->DSDIFFcmtRef($thisComment['comment_type_id'], $thisComment['comment_ref_id']);
$thisComment['creation_unix'] = mktime($thisComment['creation_hour'], $thisComment['creation_minute'], 0, $thisComment['creation_month'], $thisComment['creation_day'], $thisComment['creation_year']);
$thisChunk['comments'][$i] = $thisComment;
$commentkey = ($thisComment['comment_reference'] ?: 'comment');
$info['dsdiff']['comments'][$commentkey][] = $thisComment['comment_text'];
unset($thisComment);
}
break;
case 'MARK': // MARKer chunk
$MARK = $this->fread(22);
$thisChunk['marker_hours'] = getid3_lib::BigEndian2Int(substr($MARK, 0, 2));
$thisChunk['marker_minutes'] = getid3_lib::BigEndian2Int(substr($MARK, 2, 1));
$thisChunk['marker_seconds'] = getid3_lib::BigEndian2Int(substr($MARK, 3, 1));
$thisChunk['marker_samples'] = getid3_lib::BigEndian2Int(substr($MARK, 4, 4));
$thisChunk['marker_offset'] = getid3_lib::BigEndian2Int(substr($MARK, 8, 4));
$thisChunk['marker_type_id'] = getid3_lib::BigEndian2Int(substr($MARK, 12, 2));
$thisChunk['marker_channel'] = getid3_lib::BigEndian2Int(substr($MARK, 14, 2));
$thisChunk['marker_flagraw'] = getid3_lib::BigEndian2Int(substr($MARK, 16, 2));
$thisChunk['string_length'] = getid3_lib::BigEndian2Int(substr($MARK, 18, 4));
$thisChunk['description'] = ($thisChunk['string_length'] ? $this->fread($thisChunk['string_length']) : '');
if ($thisChunk['string_length'] % 2) {
// markerText[] is the description of the marker. This text must be padded with a byte at the end, if needed, to make it an even number of bytes long. This pad byte, if present, is not included in count.
$this->fseek(1, SEEK_CUR);
}
$thisChunk['marker_type'] = $this->DSDIFFmarkType($thisChunk['marker_type_id']);
unset($MARK);
break;
case 'DIAR': // artist chunk
case 'DITI': // title chunk
$thisChunk['string_length'] = getid3_lib::BigEndian2Int($this->fread(4));
$thisChunk['description'] = ($thisChunk['string_length'] ? $this->fread($thisChunk['string_length']) : '');
if ($thisChunk['string_length'] % 2) {
// This text must be padded with a byte at the end, if needed, to make it an even number of bytes long. This pad byte, if present, is not included in count.
$this->fseek(1, SEEK_CUR);
}
if ($commentkey = (($thisChunk['name'] == 'DIAR') ? 'artist' : (($thisChunk['name'] == 'DITI') ? 'title' : ''))) {
@$info['dsdiff']['comments'][$commentkey][] = $thisChunk['description'];
}
break;
case 'EMID': // Edited Master ID chunk
if ($thisChunk['size']) {
$thisChunk['identifier'] = $this->fread($thisChunk['size']);
}
break;
case 'ID3 ':
$endOfID3v2 = $this->ftell() + $datasize; // we will need to reset the filepointer after parsing ID3v2
getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.tag.id3v2.php', __FILE__, true);
$getid3_temp = new getID3();
$getid3_temp->openfile($this->getid3->filename, $this->getid3->info['filesize'], $this->getid3->fp);
$getid3_id3v2 = new getid3_id3v2($getid3_temp);
$getid3_id3v2->StartingOffset = $this->ftell();
if ($thisChunk['valid'] = $getid3_id3v2->Analyze()) {
$info['id3v2'] = $getid3_temp->info['id3v2'];
}
unset($getid3_temp, $getid3_id3v2);
$this->fseek($endOfID3v2);
break;
case 'DSD ': // DSD sound data chunk
case 'DST ': // DST sound data chunk
// actual audio data, we're not interested, skip
$this->fseek($datasize, SEEK_CUR);
break;
default:
$this->warning('Unhandled chunk "'.$thisChunk['name'].'"');
$this->fseek($datasize, SEEK_CUR);
break;
}
@$info['dsdiff']['chunks'][] = $thisChunk;
//break;
}
if (empty($info['audio']['bitrate']) && !empty($info['audio']['channels']) && !empty($info['audio']['sample_rate']) && !empty($info['audio']['bits_per_sample'])) {
$info['audio']['bitrate'] = $info['audio']['bits_per_sample'] * $info['audio']['sample_rate'] * $info['audio']['channels'];
}
return true;
}
/**
* @param int $cmtType
*
* @return string
*/
public static function DSDIFFcmtType($cmtType) {
static $DSDIFFcmtType = array(
0 => 'General (album) Comment',
1 => 'Channel Comment',
2 => 'Sound Source',
3 => 'File History',
);
return (isset($DSDIFFcmtType[$cmtType]) ? $DSDIFFcmtType[$cmtType] : 'reserved');
}
/**
* @param int $cmtType
* @param int $cmtRef
*
* @return string
*/
public static function DSDIFFcmtRef($cmtType, $cmtRef) {
static $DSDIFFcmtRef = array(
2 => array( // Sound Source
0 => 'DSD recording',
1 => 'Analogue recording',
2 => 'PCM recording',
),
3 => array( // File History
0 => 'comment', // General Remark
1 => 'encodeby', // Name of the operator
2 => 'encoder', // Name or type of the creating machine
3 => 'timezone', // Time zone information
4 => 'revision', // Revision of the file
),
);
switch ($cmtType) {
case 0:
// If the comment type is General Comment the comment reference must be 0
return '';
case 1:
// If the comment type is Channel Comment, the comment reference defines the channel number to which the comment belongs
return ($cmtRef ? 'channel '.$cmtRef : 'all channels');
case 2:
case 3:
return (isset($DSDIFFcmtRef[$cmtType][$cmtRef]) ? $DSDIFFcmtRef[$cmtType][$cmtRef] : 'reserved');
}
return 'unsupported $cmtType='.$cmtType;
}
/**
* @param int $markType
*
* @return string
*/
public static function DSDIFFmarkType($markType) {
static $DSDIFFmarkType = array(
0 => 'TrackStart', // Entry point for a Track start
1 => 'TrackStop', // Entry point for ending a Track
2 => 'ProgramStart', // Start point of 2-channel or multi-channel area
3 => 'Obsolete', //
4 => 'Index', // Entry point of an Index
);
return (isset($DSDIFFmarkType[$markType]) ? $DSDIFFmarkType[$markType] : 'reserved');
}
}
|
