50be37c321bbf7d76bc8f06442c2af0219ce63ae
2 /////////////////////////////////////////////////////////////////
3 /// getID3() by James Heinrich <info@getid3.org> //
4 // available at http://getid3.sourceforge.net //
5 // or http://www.getid3.org //
6 // also https://github.com/JamesHeinrich/getID3 //
7 /////////////////////////////////////////////////////////////////
8 // See readme.txt for more details //
9 /////////////////////////////////////////////////////////////////
11 // module.audio.dsf.php //
12 // module for analyzing dsf/DSF Audio files //
13 // dependencies: module.tag.id3v2.php //
15 /////////////////////////////////////////////////////////////////
17 getid3_lib
::IncludeDependency(GETID3_INCLUDEPATH
.'module.tag.id3v2.php', __FILE__
, true);
19 class getid3_dsf
extends getid3_handler
22 public function Analyze() {
23 $info = &$this->getid3
->info
;
25 $info['fileformat'] = 'dsf';
26 $info['audio']['dataformat'] = 'dsf';
27 $info['audio']['lossless'] = true;
28 $info['audio']['bitrate_mode'] = 'cbr';
30 $this->fseek($info['avdataoffset']);
31 $dsfheader = $this->fread(28 +
12);
34 $info['dsf']['dsd']['magic'] = substr($dsfheader, $headeroffset, 4);
37 if ($info['dsf']['dsd']['magic'] != $magic) {
38 $this->error('Expecting "'.getid3_lib
::PrintHexBytes($magic).'" at offset '.$info['avdataoffset'].', found "'.getid3_lib
::PrintHexBytes($info['dsf']['dsd']['magic']).'"');
39 unset($info['fileformat']);
40 unset($info['audio']);
44 $info['dsf']['dsd']['dsd_chunk_size'] = getid3_lib
::LittleEndian2Int(substr($dsfheader, $headeroffset, 8)); // should be 28
46 $info['dsf']['dsd']['dsf_file_size'] = getid3_lib
::LittleEndian2Int(substr($dsfheader, $headeroffset, 8));
48 $info['dsf']['dsd']['meta_chunk_offset'] = getid3_lib
::LittleEndian2Int(substr($dsfheader, $headeroffset, 8));
52 $info['dsf']['fmt']['magic'] = substr($dsfheader, $headeroffset, 4);
55 if ($info['dsf']['fmt']['magic'] != $magic) {
56 $this->error('Expecting "'.getid3_lib
::PrintHexBytes($magic).'" at offset '.$headeroffset.', found "'.getid3_lib
::PrintHexBytes($info['dsf']['fmt']['magic']).'"');
59 $info['dsf']['fmt']['fmt_chunk_size'] = getid3_lib
::LittleEndian2Int(substr($dsfheader, $headeroffset, 8)); // usually 52 bytes
61 $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.
62 if (strlen($dsfheader) != ($info['dsf']['dsd']['dsd_chunk_size'] +
$info['dsf']['fmt']['fmt_chunk_size'] +
12)) {
63 $this->error('Expecting '.($info['dsf']['dsd']['dsd_chunk_size'] +
$info['dsf']['fmt']['fmt_chunk_size']).' bytes header, found '.strlen($dsfheader).' bytes');
66 $info['dsf']['fmt']['format_version'] = getid3_lib
::LittleEndian2Int(substr($dsfheader, $headeroffset, 4)); // usually "1"
68 $info['dsf']['fmt']['format_id'] = getid3_lib
::LittleEndian2Int(substr($dsfheader, $headeroffset, 4)); // usually "0" = "DSD Raw"
70 $info['dsf']['fmt']['channel_type_id'] = getid3_lib
::LittleEndian2Int(substr($dsfheader, $headeroffset, 4));
72 $info['dsf']['fmt']['channels'] = getid3_lib
::LittleEndian2Int(substr($dsfheader, $headeroffset, 4));
74 $info['dsf']['fmt']['sample_rate'] = getid3_lib
::LittleEndian2Int(substr($dsfheader, $headeroffset, 4));
76 $info['dsf']['fmt']['bits_per_sample'] = getid3_lib
::LittleEndian2Int(substr($dsfheader, $headeroffset, 4));
78 $info['dsf']['fmt']['sample_count'] = getid3_lib
::LittleEndian2Int(substr($dsfheader, $headeroffset, 8));
80 $info['dsf']['fmt']['channel_block_size'] = getid3_lib
::LittleEndian2Int(substr($dsfheader, $headeroffset, 4));
82 $info['dsf']['fmt']['reserved'] = getid3_lib
::LittleEndian2Int(substr($dsfheader, $headeroffset, 4)); // zero-filled
86 $info['dsf']['data']['magic'] = substr($dsfheader, $headeroffset, 4);
89 if ($info['dsf']['data']['magic'] != $magic) {
90 $this->error('Expecting "'.getid3_lib
::PrintHexBytes($magic).'" at offset '.$headeroffset.', found "'.getid3_lib
::PrintHexBytes($info['dsf']['data']['magic']).'"');
93 $info['dsf']['data']['data_chunk_size'] = getid3_lib
::LittleEndian2Int(substr($dsfheader, $headeroffset, 8));
95 $info['avdataoffset'] = $headeroffset;
96 $info['avdataend'] = $info['avdataoffset'] +
$info['dsf']['data']['data_chunk_size'];
99 if ($info['dsf']['dsd']['meta_chunk_offset'] > 0) {
100 $getid3_id3v2 = new getid3_id3v2($this->getid3
);
101 $getid3_id3v2->StartingOffset
= $info['dsf']['dsd']['meta_chunk_offset'];
102 $getid3_id3v2->Analyze();
103 unset($getid3_id3v2);
107 $info['dsf']['fmt']['channel_type'] = $this->DSFchannelTypeLookup($info['dsf']['fmt']['channel_type_id']);
108 $info['audio']['channelmode'] = $info['dsf']['fmt']['channel_type'];
109 $info['audio']['bits_per_sample'] = $info['dsf']['fmt']['bits_per_sample'];
110 $info['audio']['sample_rate'] = $info['dsf']['fmt']['sample_rate'];
111 $info['audio']['channels'] = $info['dsf']['fmt']['channels'];
112 $info['audio']['bitrate'] = $info['audio']['bits_per_sample'] * $info['audio']['sample_rate'] * $info['audio']['channels'];
113 $info['playtime_seconds'] = ($info['dsf']['data']['data_chunk_size'] * 8) / $info['audio']['bitrate'];
119 public static function DSFchannelTypeLookup($channel_type_id) {
120 static $DSFchannelTypeLookup = array(
121 // interleaving order:
122 1 => 'mono', // 1: Mono
123 2 => 'stereo', // 1: Front-Left; 2: Front-Right
124 3 => '3-channel', // 1: Front-Left; 2: Front-Right; 3: Center
125 4 => 'quad', // 1: Front-Left; 2: Front-Right; 3: Back-Left; 4: Back-Right
126 5 => '4-channel', // 1: Front-Left; 2: Front-Right; 3: Center; 4: Low-Frequency
127 6 => '5-channel', // 1: Front-Left; 2: Front-Right; 3: Center; 4: Back-Left 5: Back-Right
128 7 => '5.1', // 1: Front-Left; 2: Front-Right; 3: Center; 4: Low-Frequency; 5: Back-Left; 6: Back-Right
130 return (isset($DSFchannelTypeLookup[$channel_type_id]) ?
$DSFchannelTypeLookup[$channel_type_id] : '');