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

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

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

Public Member Functions

 analyze ()
 
 MonkeyCompressionLevelNameLookup ($compressionlevel)
 array $MonkeyCompressionLevelNameLookup More...
 
 MonkeySamplesPerFrame ($versionid, $compressionlevel)
 
- 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 Monkey's 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 Monkey.php.

Member Function Documentation

◆ analyze()

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

Definition at line 36 of file Monkey.php.

References $info, array, GetId3\Handler\BaseHandler\fread(), GetId3\Handler\BaseHandler\fseek(), GetId3\Lib\Helper\LittleEndian2Int(), GetId3\Module\Audio\Monkey\MonkeyCompressionLevelNameLookup(), GetId3\Module\Audio\Monkey\MonkeySamplesPerFrame(), and GetId3\Lib\Helper\PrintHexBytes().

37  {
38  $info = &$this->getid3->info;
39 
40  // based loosely on code from TMonkey by Jurgen Faul <jfaulØgmx*de>
41  // http://jfaul.de/atl or http://j-faul.virtualave.net/atl/atl.html
42 
43  $info['fileformat'] = 'mac';
44  $info['audio']['dataformat'] = 'mac';
45  $info['audio']['bitrate_mode'] = 'vbr';
46  $info['audio']['lossless'] = true;
47 
48  $info['monkeys_audio']['raw'] = array();
49  $thisfile_monkeysaudio = &$info['monkeys_audio'];
50  $thisfile_monkeysaudio_raw = &$thisfile_monkeysaudio['raw'];
51 
52  fseek($this->getid3->fp, $info['avdataoffset'], SEEK_SET);
53  $MACheaderData = fread($this->getid3->fp, 74);
54 
55  $thisfile_monkeysaudio_raw['magic'] = substr($MACheaderData, 0, 4);
56  $magic = 'MAC ';
57  if ($thisfile_monkeysaudio_raw['magic'] != $magic) {
58  $info['error'][] = 'Expecting "'.Helper::PrintHexBytes($magic).'" at offset '.$info['avdataoffset'].', found "'.Helper::PrintHexBytes($thisfile_monkeysaudio_raw['magic']).'"';
59  unset($info['fileformat']);
60 
61  return false;
62  }
63  $thisfile_monkeysaudio_raw['nVersion'] = Helper::LittleEndian2Int(substr($MACheaderData, 4, 2)); // appears to be uint32 in 3.98+
64 
65  if ($thisfile_monkeysaudio_raw['nVersion'] < 3980) {
66  $thisfile_monkeysaudio_raw['nCompressionLevel'] = Helper::LittleEndian2Int(substr($MACheaderData, 6, 2));
67  $thisfile_monkeysaudio_raw['nFormatFlags'] = Helper::LittleEndian2Int(substr($MACheaderData, 8, 2));
68  $thisfile_monkeysaudio_raw['nChannels'] = Helper::LittleEndian2Int(substr($MACheaderData, 10, 2));
69  $thisfile_monkeysaudio_raw['nSampleRate'] = Helper::LittleEndian2Int(substr($MACheaderData, 12, 4));
70  $thisfile_monkeysaudio_raw['nHeaderDataBytes'] = Helper::LittleEndian2Int(substr($MACheaderData, 16, 4));
71  $thisfile_monkeysaudio_raw['nWAVTerminatingBytes'] = Helper::LittleEndian2Int(substr($MACheaderData, 20, 4));
72  $thisfile_monkeysaudio_raw['nTotalFrames'] = Helper::LittleEndian2Int(substr($MACheaderData, 24, 4));
73  $thisfile_monkeysaudio_raw['nFinalFrameSamples'] = Helper::LittleEndian2Int(substr($MACheaderData, 28, 4));
74  $thisfile_monkeysaudio_raw['nPeakLevel'] = Helper::LittleEndian2Int(substr($MACheaderData, 32, 4));
75  $thisfile_monkeysaudio_raw['nSeekElements'] = Helper::LittleEndian2Int(substr($MACheaderData, 38, 2));
76  $offset = 8;
77  } else {
78  $offset = 8;
79  // APE_DESCRIPTOR
80  $thisfile_monkeysaudio_raw['nDescriptorBytes'] = Helper::LittleEndian2Int(substr($MACheaderData, $offset, 4));
81  $offset += 4;
82  $thisfile_monkeysaudio_raw['nHeaderBytes'] = Helper::LittleEndian2Int(substr($MACheaderData, $offset, 4));
83  $offset += 4;
84  $thisfile_monkeysaudio_raw['nSeekTableBytes'] = Helper::LittleEndian2Int(substr($MACheaderData, $offset, 4));
85  $offset += 4;
86  $thisfile_monkeysaudio_raw['nHeaderDataBytes'] = Helper::LittleEndian2Int(substr($MACheaderData, $offset, 4));
87  $offset += 4;
88  $thisfile_monkeysaudio_raw['nAPEFrameDataBytes'] = Helper::LittleEndian2Int(substr($MACheaderData, $offset, 4));
89  $offset += 4;
90  $thisfile_monkeysaudio_raw['nAPEFrameDataBytesHigh'] = Helper::LittleEndian2Int(substr($MACheaderData, $offset, 4));
91  $offset += 4;
92  $thisfile_monkeysaudio_raw['nTerminatingDataBytes'] = Helper::LittleEndian2Int(substr($MACheaderData, $offset, 4));
93  $offset += 4;
94  $thisfile_monkeysaudio_raw['cFileMD5'] = substr($MACheaderData, $offset, 16);
95  $offset += 16;
96 
97  // APE_HEADER
98  $thisfile_monkeysaudio_raw['nCompressionLevel'] = Helper::LittleEndian2Int(substr($MACheaderData, $offset, 2));
99  $offset += 2;
100  $thisfile_monkeysaudio_raw['nFormatFlags'] = Helper::LittleEndian2Int(substr($MACheaderData, $offset, 2));
101  $offset += 2;
102  $thisfile_monkeysaudio_raw['nBlocksPerFrame'] = Helper::LittleEndian2Int(substr($MACheaderData, $offset, 4));
103  $offset += 4;
104  $thisfile_monkeysaudio_raw['nFinalFrameBlocks'] = Helper::LittleEndian2Int(substr($MACheaderData, $offset, 4));
105  $offset += 4;
106  $thisfile_monkeysaudio_raw['nTotalFrames'] = Helper::LittleEndian2Int(substr($MACheaderData, $offset, 4));
107  $offset += 4;
108  $thisfile_monkeysaudio_raw['nBitsPerSample'] = Helper::LittleEndian2Int(substr($MACheaderData, $offset, 2));
109  $offset += 2;
110  $thisfile_monkeysaudio_raw['nChannels'] = Helper::LittleEndian2Int(substr($MACheaderData, $offset, 2));
111  $offset += 2;
112  $thisfile_monkeysaudio_raw['nSampleRate'] = Helper::LittleEndian2Int(substr($MACheaderData, $offset, 4));
113  $offset += 4;
114  }
115 
116  $thisfile_monkeysaudio['flags']['8-bit'] = (bool) ($thisfile_monkeysaudio_raw['nFormatFlags'] & 0x0001);
117  $thisfile_monkeysaudio['flags']['crc-32'] = (bool) ($thisfile_monkeysaudio_raw['nFormatFlags'] & 0x0002);
118  $thisfile_monkeysaudio['flags']['peak_level'] = (bool) ($thisfile_monkeysaudio_raw['nFormatFlags'] & 0x0004);
119  $thisfile_monkeysaudio['flags']['24-bit'] = (bool) ($thisfile_monkeysaudio_raw['nFormatFlags'] & 0x0008);
120  $thisfile_monkeysaudio['flags']['seek_elements'] = (bool) ($thisfile_monkeysaudio_raw['nFormatFlags'] & 0x0010);
121  $thisfile_monkeysaudio['flags']['no_wav_header'] = (bool) ($thisfile_monkeysaudio_raw['nFormatFlags'] & 0x0020);
122  $thisfile_monkeysaudio['version'] = $thisfile_monkeysaudio_raw['nVersion'] / 1000;
123  $thisfile_monkeysaudio['compression'] = $this->MonkeyCompressionLevelNameLookup($thisfile_monkeysaudio_raw['nCompressionLevel']);
124  if ($thisfile_monkeysaudio_raw['nVersion'] < 3980) {
125  $thisfile_monkeysaudio['samples_per_frame'] = $this->MonkeySamplesPerFrame($thisfile_monkeysaudio_raw['nVersion'], $thisfile_monkeysaudio_raw['nCompressionLevel']);
126  }
127  $thisfile_monkeysaudio['bits_per_sample'] = ($thisfile_monkeysaudio['flags']['24-bit'] ? 24 : ($thisfile_monkeysaudio['flags']['8-bit'] ? 8 : 16));
128  $thisfile_monkeysaudio['channels'] = $thisfile_monkeysaudio_raw['nChannels'];
129  $info['audio']['channels'] = $thisfile_monkeysaudio['channels'];
130  $thisfile_monkeysaudio['sample_rate'] = $thisfile_monkeysaudio_raw['nSampleRate'];
131  if ($thisfile_monkeysaudio['sample_rate'] == 0) {
132  $info['error'][] = 'Corrupt MAC file: frequency == zero';
133 
134  return false;
135  }
136  $info['audio']['sample_rate'] = $thisfile_monkeysaudio['sample_rate'];
137  if ($thisfile_monkeysaudio['flags']['peak_level']) {
138  $thisfile_monkeysaudio['peak_level'] = $thisfile_monkeysaudio_raw['nPeakLevel'];
139  $thisfile_monkeysaudio['peak_ratio'] = $thisfile_monkeysaudio['peak_level'] / pow(2, $thisfile_monkeysaudio['bits_per_sample'] - 1);
140  }
141  if ($thisfile_monkeysaudio_raw['nVersion'] >= 3980) {
142  $thisfile_monkeysaudio['samples'] = (($thisfile_monkeysaudio_raw['nTotalFrames'] - 1) * $thisfile_monkeysaudio_raw['nBlocksPerFrame']) + $thisfile_monkeysaudio_raw['nFinalFrameBlocks'];
143  } else {
144  $thisfile_monkeysaudio['samples'] = (($thisfile_monkeysaudio_raw['nTotalFrames'] - 1) * $thisfile_monkeysaudio['samples_per_frame']) + $thisfile_monkeysaudio_raw['nFinalFrameSamples'];
145  }
146  $thisfile_monkeysaudio['playtime'] = $thisfile_monkeysaudio['samples'] / $thisfile_monkeysaudio['sample_rate'];
147  if ($thisfile_monkeysaudio['playtime'] == 0) {
148  $info['error'][] = 'Corrupt MAC file: playtime == zero';
149 
150  return false;
151  }
152  $info['playtime_seconds'] = $thisfile_monkeysaudio['playtime'];
153  $thisfile_monkeysaudio['compressed_size'] = $info['avdataend'] - $info['avdataoffset'];
154  $thisfile_monkeysaudio['uncompressed_size'] = $thisfile_monkeysaudio['samples'] * $thisfile_monkeysaudio['channels'] * ($thisfile_monkeysaudio['bits_per_sample'] / 8);
155  if ($thisfile_monkeysaudio['uncompressed_size'] == 0) {
156  $info['error'][] = 'Corrupt MAC file: uncompressed_size == zero';
157 
158  return false;
159  }
160  $thisfile_monkeysaudio['compression_ratio'] = $thisfile_monkeysaudio['compressed_size'] / ($thisfile_monkeysaudio['uncompressed_size'] + $thisfile_monkeysaudio_raw['nHeaderDataBytes']);
161  $thisfile_monkeysaudio['bitrate'] = (($thisfile_monkeysaudio['samples'] * $thisfile_monkeysaudio['channels'] * $thisfile_monkeysaudio['bits_per_sample']) / $thisfile_monkeysaudio['playtime']) * $thisfile_monkeysaudio['compression_ratio'];
162  $info['audio']['bitrate'] = $thisfile_monkeysaudio['bitrate'];
163 
164  // add size of MAC header to avdataoffset
165  if ($thisfile_monkeysaudio_raw['nVersion'] >= 3980) {
166  $info['avdataoffset'] += $thisfile_monkeysaudio_raw['nDescriptorBytes'];
167  $info['avdataoffset'] += $thisfile_monkeysaudio_raw['nHeaderBytes'];
168  $info['avdataoffset'] += $thisfile_monkeysaudio_raw['nSeekTableBytes'];
169  $info['avdataoffset'] += $thisfile_monkeysaudio_raw['nHeaderDataBytes'];
170 
171  $info['avdataend'] -= $thisfile_monkeysaudio_raw['nTerminatingDataBytes'];
172  } else {
173  $info['avdataoffset'] += $offset;
174  }
175 
176  if ($thisfile_monkeysaudio_raw['nVersion'] >= 3980) {
177  if ($thisfile_monkeysaudio_raw['cFileMD5'] === str_repeat("\x00", 16)) {
178  //$info['warning'][] = 'cFileMD5 is null';
179  } else {
180  $info['md5_data_source'] = '';
181  $md5 = $thisfile_monkeysaudio_raw['cFileMD5'];
182  for ($i = 0; $i < strlen($md5); $i++) {
183  $info['md5_data_source'] .= str_pad(dechex(ord($md5{$i})), 2, '00', STR_PAD_LEFT);
184  }
185  if (!preg_match('/^[0-9a-f]{32}$/', $info['md5_data_source'])) {
186  unset($info['md5_data_source']);
187  }
188  }
189  }
190 
191  $info['audio']['bits_per_sample'] = $thisfile_monkeysaudio['bits_per_sample'];
192  $info['audio']['encoder'] = 'MAC v'.number_format($thisfile_monkeysaudio['version'], 2);
193  $info['audio']['encoder_options'] = ucfirst($thisfile_monkeysaudio['compression']).' compression';
194 
195  return true;
196  }
GetId3\Lib\Helper\PrintHexBytes
static PrintHexBytes($string, $hex=true, $spaces=true, $htmlencoding='UTF-8')
Definition: Helper.php:36
GetId3\Module\Audio\Monkey\MonkeyCompressionLevelNameLookup
MonkeyCompressionLevelNameLookup($compressionlevel)
array $MonkeyCompressionLevelNameLookup
Definition: Monkey.php:204
GetId3\Handler\BaseHandler\fseek
fseek($bytes, $whence=SEEK_SET)
Definition: BaseHandler.php:148
$info
$info
Definition: example_052.php:80
array
Create styles array
The data for the language used.
Definition: 40duplicateStyle.php:19
GetId3\Lib\Helper\LittleEndian2Int
static LittleEndian2Int($byteword, $signed=false)
Definition: Helper.php:413
GetId3\Module\Audio\Monkey\MonkeySamplesPerFrame
MonkeySamplesPerFrame($versionid, $compressionlevel)
Definition: Monkey.php:224
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◆ MonkeyCompressionLevelNameLookup()

GetId3\Module\Audio\Monkey::MonkeyCompressionLevelNameLookup (   $compressionlevel)

array $MonkeyCompressionLevelNameLookup

Parameters
type$compressionlevel
Returns
type

Definition at line 204 of file Monkey.php.

References array.

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

205  {
206  static $MonkeyCompressionLevelNameLookup = array(
207  0 => 'unknown',
208  1000 => 'fast',
209  2000 => 'normal',
210  3000 => 'high',
211  4000 => 'extra-high',
212  5000 => 'insane'
213  );
214 
215  return (isset($MonkeyCompressionLevelNameLookup[$compressionlevel]) ? $MonkeyCompressionLevelNameLookup[$compressionlevel] : 'invalid');
216  }
array
Create styles array
The data for the language used.
Definition: 40duplicateStyle.php:19
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◆ MonkeySamplesPerFrame()

GetId3\Module\Audio\Monkey::MonkeySamplesPerFrame (   $versionid,
  $compressionlevel 
)
Parameters
type$versionid
type$compressionlevel
Returns
int

Definition at line 224 of file Monkey.php.

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

225  {
226  if ($versionid >= 3950) {
227  return 73728 * 4;
228  } elseif ($versionid >= 3900) {
229  return 73728;
230  } elseif (($versionid >= 3800) && ($compressionlevel == 4000)) {
231  return 73728;
232  } else {
233  return 9216;
234  }
235  }
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The documentation for this class was generated from the following file: