ILIAS  release_5-3 Revision v5.3.23-19-g915713cf615
Public Member Functions | Static Public Member Functions
getid3_dsf Class Reference
+ Inheritance diagram for getid3_dsf:
+ Collaboration diagram for getid3_dsf:

Public Member Functions

 Analyze ()
 
- Public Member Functions inherited from getid3_handler
 __construct (getID3 $getid3, $call_module=null)
 
 Analyze ()
 
 AnalyzeString ($string)
 
 setStringMode ($string)
 
 saveAttachment ($name, $offset, $length, $image_mime=null)
 

Static Public Member Functions

static DSFchannelTypeLookup ($channel_type_id)
 

Additional Inherited Members

- Protected Member Functions inherited from getid3_handler
 ftell ()
 
 fread ($bytes)
 
 fseek ($bytes, $whence=SEEK_SET)
 
 feof ()
 
 isDependencyFor ($module)
 
 error ($text)
 
 warning ($text)
 
 notice ($text)
 
- Protected Attributes inherited from getid3_handler
 $getid3
 
 $data_string_flag = false
 
 $data_string = ''
 
 $data_string_position = 0
 
 $data_string_length = 0
 

Detailed Description

Definition at line 19 of file module.audio.dsf.php.

Member Function Documentation

◆ Analyze()

getid3_dsf::Analyze ( )

Definition at line 22 of file module.audio.dsf.php.

References $info, DSFchannelTypeLookup(), getid3_handler\error(), getid3_handler\fread(), getid3_handler\fseek(), getid3_lib\LittleEndian2Int(), and getid3_lib\PrintHexBytes().

22  {
23  $info = &$this->getid3->info;
24 
25  $info['fileformat'] = 'dsf';
26  $info['audio']['dataformat'] = 'dsf';
27  $info['audio']['lossless'] = true;
28  $info['audio']['bitrate_mode'] = 'cbr';
29 
30  $this->fseek($info['avdataoffset']);
31  $dsfheader = $this->fread(28 + 12);
32 
33  $headeroffset = 0;
34  $info['dsf']['dsd']['magic'] = substr($dsfheader, $headeroffset, 4);
35  $headeroffset += 4;
36  $magic = 'DSD ';
37  if ($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']);
41  unset($info['dsf']);
42  return false;
43  }
44  $info['dsf']['dsd']['dsd_chunk_size'] = getid3_lib::LittleEndian2Int(substr($dsfheader, $headeroffset, 8)); // should be 28
45  $headeroffset += 8;
46  $info['dsf']['dsd']['dsf_file_size'] = getid3_lib::LittleEndian2Int(substr($dsfheader, $headeroffset, 8));
47  $headeroffset += 8;
48  $info['dsf']['dsd']['meta_chunk_offset'] = getid3_lib::LittleEndian2Int(substr($dsfheader, $headeroffset, 8));
49  $headeroffset += 8;
50 
51 
52  $info['dsf']['fmt']['magic'] = substr($dsfheader, $headeroffset, 4);
53  $headeroffset += 4;
54  $magic = 'fmt ';
55  if ($info['dsf']['fmt']['magic'] != $magic) {
56  $this->error('Expecting "'.getid3_lib::PrintHexBytes($magic).'" at offset '.$headeroffset.', found "'.getid3_lib::PrintHexBytes($info['dsf']['fmt']['magic']).'"');
57  return false;
58  }
59  $info['dsf']['fmt']['fmt_chunk_size'] = getid3_lib::LittleEndian2Int(substr($dsfheader, $headeroffset, 8)); // usually 52 bytes
60  $headeroffset += 8;
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');
64  return false;
65  }
66  $info['dsf']['fmt']['format_version'] = getid3_lib::LittleEndian2Int(substr($dsfheader, $headeroffset, 4)); // usually "1"
67  $headeroffset += 4;
68  $info['dsf']['fmt']['format_id'] = getid3_lib::LittleEndian2Int(substr($dsfheader, $headeroffset, 4)); // usually "0" = "DSD Raw"
69  $headeroffset += 4;
70  $info['dsf']['fmt']['channel_type_id'] = getid3_lib::LittleEndian2Int(substr($dsfheader, $headeroffset, 4));
71  $headeroffset += 4;
72  $info['dsf']['fmt']['channels'] = getid3_lib::LittleEndian2Int(substr($dsfheader, $headeroffset, 4));
73  $headeroffset += 4;
74  $info['dsf']['fmt']['sample_rate'] = getid3_lib::LittleEndian2Int(substr($dsfheader, $headeroffset, 4));
75  $headeroffset += 4;
76  $info['dsf']['fmt']['bits_per_sample'] = getid3_lib::LittleEndian2Int(substr($dsfheader, $headeroffset, 4));
77  $headeroffset += 4;
78  $info['dsf']['fmt']['sample_count'] = getid3_lib::LittleEndian2Int(substr($dsfheader, $headeroffset, 8));
79  $headeroffset += 8;
80  $info['dsf']['fmt']['channel_block_size'] = getid3_lib::LittleEndian2Int(substr($dsfheader, $headeroffset, 4));
81  $headeroffset += 4;
82  $info['dsf']['fmt']['reserved'] = getid3_lib::LittleEndian2Int(substr($dsfheader, $headeroffset, 4)); // zero-filled
83  $headeroffset += 4;
84 
85 
86  $info['dsf']['data']['magic'] = substr($dsfheader, $headeroffset, 4);
87  $headeroffset += 4;
88  $magic = 'data';
89  if ($info['dsf']['data']['magic'] != $magic) {
90  $this->error('Expecting "'.getid3_lib::PrintHexBytes($magic).'" at offset '.$headeroffset.', found "'.getid3_lib::PrintHexBytes($info['dsf']['data']['magic']).'"');
91  return false;
92  }
93  $info['dsf']['data']['data_chunk_size'] = getid3_lib::LittleEndian2Int(substr($dsfheader, $headeroffset, 8));
94  $headeroffset += 8;
95  $info['avdataoffset'] = $headeroffset;
96  $info['avdataend'] = $info['avdataoffset'] + $info['dsf']['data']['data_chunk_size'];
97 
98 
99  if ($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);
104  }
105 
106 
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) / $info['audio']['bitrate'];
114 
115  return true;
116  }
getid3_handler\error
error($text)
Definition: getid3.php:1752
getid3_lib\LittleEndian2Int
static LittleEndian2Int($byteword, $signed=false)
Definition: getid3.lib.php:292
getid3_lib\PrintHexBytes
static PrintHexBytes($string, $hex=true, $spaces=true, $htmlencoding='UTF-8')
Definition: getid3.lib.php:18
getid3_handler\fread
fread($bytes)
Definition: getid3.php:1683
getid3_id3v2
Definition: module.tag.id3v2.php:19
getid3_handler\fseek
fseek($bytes, $whence=SEEK_SET)
Definition: getid3.php:1711
$info
$info
Definition: index.php:5
getid3_dsf\DSFchannelTypeLookup
static DSFchannelTypeLookup($channel_type_id)
Definition: module.audio.dsf.php:119
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◆ DSFchannelTypeLookup()

static getid3_dsf::DSFchannelTypeLookup (   $channel_type_id)
static

Definition at line 119 of file module.audio.dsf.php.

References array.

Referenced by Analyze().

119  {
120  static $DSFchannelTypeLookup = array(
121  // interleaving order:
122  1 => 'mono', // 1: Mono
123  2 => 'stereo', // 1: Front-Left; 2: Front-Right
124  3 => '3-channel', // 1: Front-Left; 2: Front-Right; 3: Center
125  4 => 'quad', // 1: Front-Left; 2: Front-Right; 3: Back-Left; 4: Back-Right
126  5 => '4-channel', // 1: Front-Left; 2: Front-Right; 3: Center; 4: Low-Frequency
127  6 => '5-channel', // 1: Front-Left; 2: Front-Right; 3: Center; 4: Back-Left 5: Back-Right
128  7 => '5.1', // 1: Front-Left; 2: Front-Right; 3: Center; 4: Low-Frequency; 5: Back-Left; 6: Back-Right
129  );
130  return (isset($DSFchannelTypeLookup[$channel_type_id]) ? $DSFchannelTypeLookup[$channel_type_id] : '');
131  }
array
Create styles array
The data for the language used.
Definition: 40duplicateStyle.php:19
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The documentation for this class was generated from the following file: