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
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
|
<?php
/////////////////////////////////////////////////////////////////
/// getID3() by James Heinrich <info@getid3.org> //
// available at http://getid3.sourceforge.net //
// or http://www.getid3.org //
/////////////////////////////////////////////////////////////////
// See readme.txt for more details //
/////////////////////////////////////////////////////////////////
// //
// module.audio.shorten.php //
// module for analyzing Shorten Audio files //
// dependencies: NONE //
// ///
/////////////////////////////////////////////////////////////////
class getid3_shorten
{
function getid3_shorten(&$fd, &$ThisFileInfo) {
fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET);
$ShortenHeader = fread($fd, 8);
if (substr($ShortenHeader, 0, 4) != 'ajkg') {
$ThisFileInfo['error'][] = 'Expecting "ajkg" at offset '.$ThisFileInfo['avdataoffset'].', found "'.substr($ShortenHeader, 0, 4).'"';
return false;
}
$ThisFileInfo['fileformat'] = 'shn';
$ThisFileInfo['audio']['dataformat'] = 'shn';
$ThisFileInfo['audio']['lossless'] = true;
$ThisFileInfo['audio']['bitrate_mode'] = 'vbr';
$ThisFileInfo['shn']['version'] = getid3_lib::LittleEndian2Int(substr($ShortenHeader, 4, 1));
fseek($fd, $ThisFileInfo['avdataend'] - 12, SEEK_SET);
$SeekTableSignatureTest = fread($fd, 12);
$ThisFileInfo['shn']['seektable']['present'] = (bool) (substr($SeekTableSignatureTest, 4, 8) == 'SHNAMPSK');
if ($ThisFileInfo['shn']['seektable']['present']) {
$ThisFileInfo['shn']['seektable']['length'] = getid3_lib::LittleEndian2Int(substr($SeekTableSignatureTest, 0, 4));
$ThisFileInfo['shn']['seektable']['offset'] = $ThisFileInfo['avdataend'] - $ThisFileInfo['shn']['seektable']['length'];
fseek($fd, $ThisFileInfo['shn']['seektable']['offset'], SEEK_SET);
$SeekTableMagic = fread($fd, 4);
if ($SeekTableMagic != 'SEEK') {
$ThisFileInfo['error'][] = 'Expecting "SEEK" at offset '.$ThisFileInfo['shn']['seektable']['offset'].', found "'.$SeekTableMagic.'"';
return false;
} else {
// typedef struct tag_TSeekEntry
// {
// unsigned long SampleNumber;
// unsigned long SHNFileByteOffset;
// unsigned long SHNLastBufferReadPosition;
// unsigned short SHNByteGet;
// unsigned short SHNBufferOffset;
// unsigned short SHNFileBitOffset;
// unsigned long SHNGBuffer;
// unsigned short SHNBitShift;
// long CBuf0[3];
// long CBuf1[3];
// long Offset0[4];
// long Offset1[4];
// }TSeekEntry;
$SeekTableData = fread($fd, $ThisFileInfo['shn']['seektable']['length'] - 16);
$ThisFileInfo['shn']['seektable']['entry_count'] = floor(strlen($SeekTableData) / 80);
//$ThisFileInfo['shn']['seektable']['entries'] = array();
//$SeekTableOffset = 0;
//for ($i = 0; $i < $ThisFileInfo['shn']['seektable']['entry_count']; $i++) {
// $SeekTableEntry['sample_number'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4));
// $SeekTableOffset += 4;
// $SeekTableEntry['shn_file_byte_offset'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4));
// $SeekTableOffset += 4;
// $SeekTableEntry['shn_last_buffer_read_position'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4));
// $SeekTableOffset += 4;
// $SeekTableEntry['shn_byte_get'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 2));
// $SeekTableOffset += 2;
// $SeekTableEntry['shn_buffer_offset'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 2));
// $SeekTableOffset += 2;
// $SeekTableEntry['shn_file_bit_offset'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 2));
// $SeekTableOffset += 2;
// $SeekTableEntry['shn_gbuffer'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4));
// $SeekTableOffset += 4;
// $SeekTableEntry['shn_bit_shift'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 2));
// $SeekTableOffset += 2;
// for ($j = 0; $j < 3; $j++) {
// $SeekTableEntry['cbuf0'][$j] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4));
// $SeekTableOffset += 4;
// }
// for ($j = 0; $j < 3; $j++) {
// $SeekTableEntry['cbuf1'][$j] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4));
// $SeekTableOffset += 4;
// }
// for ($j = 0; $j < 4; $j++) {
// $SeekTableEntry['offset0'][$j] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4));
// $SeekTableOffset += 4;
// }
// for ($j = 0; $j < 4; $j++) {
// $SeekTableEntry['offset1'][$j] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4));
// $SeekTableOffset += 4;
// }
//
// $ThisFileInfo['shn']['seektable']['entries'][] = $SeekTableEntry;
//}
}
}
if ((bool) ini_get('safe_mode')) {
$ThisFileInfo['error'][] = 'PHP running in Safe Mode - backtick operator not available, cannot run shntool to analyze Shorten files';
return false;
}
if (GETID3_OS_ISWINDOWS) {
$RequiredFiles = array('shorten.exe', 'cygwin1.dll', 'head.exe');
foreach ($RequiredFiles as $required_file) {
if (!is_readable(GETID3_HELPERAPPSDIR.$required_file)) {
$ThisFileInfo['error'][] = GETID3_HELPERAPPSDIR.$required_file.' does not exist';
return false;
}
}
$commandline = GETID3_HELPERAPPSDIR.'shorten.exe -x "'.$ThisFileInfo['filenamepath'].'" - | '.GETID3_HELPERAPPSDIR.'head.exe -c 64';
$commandline = str_replace('/', '\\', $commandline);
} else {
static $shorten_present;
if (!isset($shorten_present)) {
$shorten_present = file_exists('/usr/local/bin/shorten') || `which shorten`;
}
if (!$shorten_present) {
$ThisFileInfo['error'][] = 'shorten binary was not found in path or /usr/local/bin';
return false;
}
$commandline = (file_exists('/usr/local/bin/shorten') ? '/usr/local/bin/' : '' ) . 'shorten -x '.escapeshellarg($ThisFileInfo['filenamepath']).' - | head -c 64';
}
$output = `$commandline`;
if (!empty($output) && (substr($output, 12, 4) == 'fmt ')) {
getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio-video.riff.php', __FILE__, true);
$fmt_size = getid3_lib::LittleEndian2Int(substr($output, 16, 4));
$DecodedWAVFORMATEX = getid3_riff::RIFFparseWAVEFORMATex(substr($output, 20, $fmt_size));
$ThisFileInfo['audio']['channels'] = $DecodedWAVFORMATEX['channels'];
$ThisFileInfo['audio']['bits_per_sample'] = $DecodedWAVFORMATEX['bits_per_sample'];
$ThisFileInfo['audio']['sample_rate'] = $DecodedWAVFORMATEX['sample_rate'];
if (substr($output, 20 + $fmt_size, 4) == 'data') {
$ThisFileInfo['playtime_seconds'] = getid3_lib::LittleEndian2Int(substr($output, 20 + 4 + $fmt_size, 4)) / $DecodedWAVFORMATEX['raw']['nAvgBytesPerSec'];
} else {
$ThisFileInfo['error'][] = 'shorten failed to decode DATA chunk to expected location, cannot determine playtime';
return false;
}
$ThisFileInfo['audio']['bitrate'] = (($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) / $ThisFileInfo['playtime_seconds']) * 8;
} else {
$ThisFileInfo['error'][] = 'shorten failed to decode file to WAV for parsing';
return false;
}
return true;
}
}
?>
|
