ILIAS  release_5-2 Revision v5.2.25-18-g3f80b828510
Public Member Functions
GetId3\Module\Audio\Vqf Class Reference

GetId3() by James Heinrich info@.nosp@m.geti.nosp@m.d3.or.nosp@m.g //. More...

+ Inheritance diagram for GetId3\Module\Audio\Vqf:
+ Collaboration diagram for GetId3\Module\Audio\Vqf:

Public Member Functions

 analyze ()
 
 VQFchannelFrequencyLookup ($frequencyid)
 array $VQFchannelFrequencyLookup More...
 
 VQFcommentNiceNameLookup ($shortname)
 array $VQFcommentNiceNameLookup More...
 
- Public Member Functions inherited from GetId3\Handler\BaseHandler
 __construct (GetId3Core $getid3, $call_module=null)
 
 analyze ()
 Analyze from file pointer. More...
 
 AnalyzeString (&$string)
 Analyze from string instead. More...
 
 saveAttachment (&$ThisFileInfoIndex, $filename, $offset, $length)
 

Additional Inherited Members

- Protected Member Functions inherited from GetId3\Handler\BaseHandler
 ftell ()
 
 fread ($bytes)
 
 fseek ($bytes, $whence=SEEK_SET)
 
 feof ()
 
 isDependencyFor ($module)
 
 error ($text)
 
 warning ($text)
 
- Protected Attributes inherited from GetId3\Handler\BaseHandler
 $getid3
 
 $data_string_flag = false
 
 $data_string = ''
 
 $data_string_position = 0
 
 $data_string_length = 0
 

Detailed Description

GetId3() by James Heinrich info@.nosp@m.geti.nosp@m.d3.or.nosp@m.g //.

module for analyzing VQF audio files

Author
James Heinrich info@.nosp@m.geti.nosp@m.d3.or.nosp@m.g http://www.getid3.org

Definition at line 29 of file Vqf.php.

Member Function Documentation

◆ analyze()

GetId3\Module\Audio\Vqf::analyze ( )
Returns
boolean

Definition at line 35 of file Vqf.php.

References $info, array, GetId3\Lib\Helper\BigEndian2Int(), GetId3\Handler\BaseHandler\fread(), GetId3\Handler\BaseHandler\fseek(), GetId3\Handler\BaseHandler\ftell(), GetId3\Lib\Helper\PrintHexBytes(), GetId3\Module\Audio\Vqf\VQFchannelFrequencyLookup(), and GetId3\Module\Audio\Vqf\VQFcommentNiceNameLookup().

36  {
37  $info = &$this->getid3->info;
38 
39  // based loosely on code from TTwinVQ by Jurgen Faul <jfaulØgmx*de>
40  // http://jfaul.de/atl or http://j-faul.virtualave.net/atl/atl.html
41 
42  $info['fileformat'] = 'vqf';
43  $info['audio']['dataformat'] = 'vqf';
44  $info['audio']['bitrate_mode'] = 'cbr';
45  $info['audio']['lossless'] = false;
46 
47  // shortcut
48  $info['vqf']['raw'] = array();
49  $thisfile_vqf = &$info['vqf'];
50  $thisfile_vqf_raw = &$thisfile_vqf['raw'];
51 
52  fseek($this->getid3->fp, $info['avdataoffset'], SEEK_SET);
53  $VQFheaderData = fread($this->getid3->fp, 16);
54 
55  $offset = 0;
56  $thisfile_vqf_raw['header_tag'] = substr($VQFheaderData, $offset, 4);
57  $magic = 'TWIN';
58  if ($thisfile_vqf_raw['header_tag'] != $magic) {
59  $info['error'][] = 'Expecting "'.Helper::PrintHexBytes($magic).'" at offset '.$info['avdataoffset'].', found "'.Helper::PrintHexBytes($thisfile_vqf_raw['header_tag']).'"';
60  unset($info['vqf']);
61  unset($info['fileformat']);
62 
63  return false;
64  }
65  $offset += 4;
66  $thisfile_vqf_raw['version'] = substr($VQFheaderData, $offset, 8);
67  $offset += 8;
68  $thisfile_vqf_raw['size'] = Helper::BigEndian2Int(substr($VQFheaderData, $offset, 4));
69  $offset += 4;
70 
71  while (ftell($this->getid3->fp) < $info['avdataend']) {
72 
73  $ChunkBaseOffset = ftell($this->getid3->fp);
74  $chunkoffset = 0;
75  $ChunkData = fread($this->getid3->fp, 8);
76  $ChunkName = substr($ChunkData, $chunkoffset, 4);
77  if ($ChunkName == 'DATA') {
78  $info['avdataoffset'] = $ChunkBaseOffset;
79  break;
80  }
81  $chunkoffset += 4;
82  $ChunkSize = Helper::BigEndian2Int(substr($ChunkData, $chunkoffset, 4));
83  $chunkoffset += 4;
84  if ($ChunkSize > ($info['avdataend'] - ftell($this->getid3->fp))) {
85  $info['error'][] = 'Invalid chunk size ('.$ChunkSize.') for chunk "'.$ChunkName.'" at offset '.$ChunkBaseOffset;
86  break;
87  }
88  if ($ChunkSize > 0) {
89  $ChunkData .= fread($this->getid3->fp, $ChunkSize);
90  }
91 
92  switch ($ChunkName) {
93  case 'COMM':
94  // shortcut
95  $thisfile_vqf['COMM'] = array();
96  $thisfile_vqf_COMM = &$thisfile_vqf['COMM'];
97 
98  $thisfile_vqf_COMM['channel_mode'] = Helper::BigEndian2Int(substr($ChunkData, $chunkoffset, 4));
99  $chunkoffset += 4;
100  $thisfile_vqf_COMM['bitrate'] = Helper::BigEndian2Int(substr($ChunkData, $chunkoffset, 4));
101  $chunkoffset += 4;
102  $thisfile_vqf_COMM['sample_rate'] = Helper::BigEndian2Int(substr($ChunkData, $chunkoffset, 4));
103  $chunkoffset += 4;
104  $thisfile_vqf_COMM['security_level'] = Helper::BigEndian2Int(substr($ChunkData, $chunkoffset, 4));
105  $chunkoffset += 4;
106 
107  $info['audio']['channels'] = $thisfile_vqf_COMM['channel_mode'] + 1;
108  $info['audio']['sample_rate'] = $this->VQFchannelFrequencyLookup($thisfile_vqf_COMM['sample_rate']);
109  $info['audio']['bitrate'] = $thisfile_vqf_COMM['bitrate'] * 1000;
110  $info['audio']['encoder_options'] = 'CBR' . ceil($info['audio']['bitrate']/1000);
111 
112  if ($info['audio']['bitrate'] == 0) {
113  $info['error'][] = 'Corrupt VQF file: bitrate_audio == zero';
114 
115  return false;
116  }
117  break;
118 
119  case 'NAME':
120  case 'AUTH':
121  case '(c) ':
122  case 'FILE':
123  case 'COMT':
124  case 'ALBM':
125  $thisfile_vqf['comments'][$this->VQFcommentNiceNameLookup($ChunkName)][] = trim(substr($ChunkData, 8));
126  break;
127 
128  case 'DSIZ':
129  $thisfile_vqf['DSIZ'] = Helper::BigEndian2Int(substr($ChunkData, 8, 4));
130  break;
131 
132  default:
133  $info['warning'][] = 'Unhandled chunk type "'.$ChunkName.'" at offset '.$ChunkBaseOffset;
134  break;
135  }
136  }
137 
138  $info['playtime_seconds'] = (($info['avdataend'] - $info['avdataoffset']) * 8) / $info['audio']['bitrate'];
139 
140  if (isset($thisfile_vqf['DSIZ']) && (($thisfile_vqf['DSIZ'] != ($info['avdataend'] - $info['avdataoffset'] - strlen('DATA'))))) {
141  switch ($thisfile_vqf['DSIZ']) {
142  case 0:
143  case 1:
144  $info['warning'][] = 'Invalid DSIZ value "'.$thisfile_vqf['DSIZ'].'". This is known to happen with VQF files encoded by Ahead Nero, and seems to be its way of saying this is TwinVQF v'.($thisfile_vqf['DSIZ'] + 1).'.0';
145  $info['audio']['encoder'] = 'Ahead Nero';
146  break;
147 
148  default:
149  $info['warning'][] = 'Probable corrupted file - should be '.$thisfile_vqf['DSIZ'].' bytes, actually '.($info['avdataend'] - $info['avdataoffset'] - strlen('DATA'));
150  break;
151  }
152  }
153 
154  return true;
155  }
GetId3\Lib\Helper\PrintHexBytes
static PrintHexBytes($string, $hex=true, $spaces=true, $htmlencoding='UTF-8')
Definition: Helper.php:36
GetId3\Module\Audio\Vqf\VQFchannelFrequencyLookup
VQFchannelFrequencyLookup($frequencyid)
array $VQFchannelFrequencyLookup
Definition: Vqf.php:163
GetId3\Handler\BaseHandler\fseek
fseek($bytes, $whence=SEEK_SET)
Definition: BaseHandler.php:148
$info
$info
Definition: example_052.php:80
array
Create styles array
The data for the language used.
Definition: 40duplicateStyle.php:19
GetId3\Module\Audio\Vqf\VQFcommentNiceNameLookup
VQFcommentNiceNameLookup($shortname)
array $VQFcommentNiceNameLookup
Definition: Vqf.php:180
GetId3\Lib\Helper\BigEndian2Int
static BigEndian2Int($byteword, $synchsafe=false, $signed=false)
Definition: Helper.php:374
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◆ VQFchannelFrequencyLookup()

GetId3\Module\Audio\Vqf::VQFchannelFrequencyLookup (   $frequencyid)

array $VQFchannelFrequencyLookup

Parameters
type$frequencyid
Returns
type

Definition at line 163 of file Vqf.php.

References array.

Referenced by GetId3\Module\Audio\Vqf\analyze().

164  {
165  static $VQFchannelFrequencyLookup = array(
166  11 => 11025,
167  22 => 22050,
168  44 => 44100
169  );
170 
171  return (isset($VQFchannelFrequencyLookup[$frequencyid]) ? $VQFchannelFrequencyLookup[$frequencyid] : $frequencyid * 1000);
172  }
array
Create styles array
The data for the language used.
Definition: 40duplicateStyle.php:19
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◆ VQFcommentNiceNameLookup()

GetId3\Module\Audio\Vqf::VQFcommentNiceNameLookup (   $shortname)

array $VQFcommentNiceNameLookup

Parameters
type$shortname
Returns
type

Definition at line 180 of file Vqf.php.

References array.

Referenced by GetId3\Module\Audio\Vqf\analyze().

181  {
182  static $VQFcommentNiceNameLookup = array(
183  'NAME' => 'title',
184  'AUTH' => 'artist',
185  '(c) ' => 'copyright',
186  'FILE' => 'filename',
187  'COMT' => 'comment',
188  'ALBM' => 'album'
189  );
190 
191  return (isset($VQFcommentNiceNameLookup[$shortname]) ? $VQFcommentNiceNameLookup[$shortname] : $shortname);
192  }
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: