blob: f1f43f6baf37b5493f58c5fdbe743c370d35d823 (
plain) (
blame)
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
|
<?php
/////////////////////////////////////////////////////////////////
/// getID3() by James Heinrich <info@getid3.org> //
// available at http://getid3.sourceforge.net //
// or http://www.getid3.org //
// also https://github.com/JamesHeinrich/getID3 //
/////////////////////////////////////////////////////////////////
namespace ID3Parser\getID3;
abstract class getid3_handler {
/**
* @var getID3
*/
protected $getid3; // pointer
protected $data_string_flag = false; // analyzing filepointer or string
protected $data_string = ''; // string to analyze
protected $data_string_position = 0; // seek position in string
protected $data_string_length = 0; // string length
private $dependency_to = null;
public function __construct(getID3 $getid3, $call_module=null) {
$this->getid3 = $getid3;
if ($call_module) {
$this->dependency_to = str_replace('getid3_', '', $call_module);
}
}
// Analyze from file pointer
abstract public function Analyze();
// Analyze from string instead
public function AnalyzeString($string) {
// Enter string mode
$this->setStringMode($string);
// Save info
$saved_avdataoffset = $this->getid3->info['avdataoffset'];
$saved_avdataend = $this->getid3->info['avdataend'];
$saved_filesize = (isset($this->getid3->info['filesize']) ? $this->getid3->info['filesize'] : null); // may be not set if called as dependency without openfile() call
// Reset some info
$this->getid3->info['avdataoffset'] = 0;
$this->getid3->info['avdataend'] = $this->getid3->info['filesize'] = $this->data_string_length;
// Analyze
$this->Analyze();
// Restore some info
$this->getid3->info['avdataoffset'] = $saved_avdataoffset;
$this->getid3->info['avdataend'] = $saved_avdataend;
$this->getid3->info['filesize'] = $saved_filesize;
// Exit string mode
$this->data_string_flag = false;
}
public function setStringMode($string) {
$this->data_string_flag = true;
$this->data_string = $string;
$this->data_string_length = strlen($string);
}
protected function ftell() {
if ($this->data_string_flag) {
return $this->data_string_position;
}
return ftell($this->getid3->fp);
}
protected function fread($bytes) {
if ($this->data_string_flag) {
$this->data_string_position += $bytes;
return substr($this->data_string, $this->data_string_position - $bytes, $bytes);
}
$pos = $this->ftell() + $bytes;
if (!getid3_lib::intValueSupported($pos)) {
throw new getid3_exception('cannot fread('.$bytes.' from '.$this->ftell().') because beyond PHP filesystem limit', 10);
}
// System fread function may return less data than requested in case the file is not a regular local file.
// See http://php.net/manual/en/function.fread.php. Call it repeatedly in a loop if that is the case.
$contents = '';
do {
$part = fread($this->getid3->fp, $bytes);
$partLength = strlen($part);
$bytes -= $partLength;
$contents .= $part;
} while ($bytes > 0 && $partLength > 0);
return $contents;
}
protected function fseek($bytes, $whence=SEEK_SET) {
if ($this->data_string_flag) {
switch ($whence) {
case SEEK_SET:
$this->data_string_position = $bytes;
break;
case SEEK_CUR:
$this->data_string_position += $bytes;
break;
case SEEK_END:
$this->data_string_position = $this->data_string_length + $bytes;
break;
}
return 0;
} else {
$pos = $bytes;
if ($whence == SEEK_CUR) {
$pos = $this->ftell() + $bytes;
} elseif ($whence == SEEK_END) {
$pos = $this->getid3->info['filesize'] + $bytes;
}
if (!getid3_lib::intValueSupported($pos)) {
throw new getid3_exception('cannot fseek('.$pos.') because beyond PHP filesystem limit', 10);
}
}
return fseek($this->getid3->fp, $bytes, $whence);
}
protected function feof() {
if ($this->data_string_flag) {
return $this->data_string_position >= $this->data_string_length;
}
return feof($this->getid3->fp);
}
final protected function isDependencyFor($module) {
return $this->dependency_to == $module;
}
protected function error($text) {
$this->getid3->info['error'][] = $text;
return false;
}
protected function warning($text) {
return $this->getid3->warning($text);
}
protected function notice($text) {
// does nothing for now
}
}
|
