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- Committer: Package Import Robot
- Author(s): Charlie Smotherman
- Date: 2013-08-27 13:19:48 UTC
- mfrom: (1.2.9)
- Revision ID: package-import@ubuntu.com-20130827131948-1czew0zxn6u70dtv
Tags: 3.6-rzb2752+dfsg-1
* New upsteam snapshot. Contains important bug fixes to the installer.
* Correct typo in ampache-common.postrm.
* Remove courtousy copy of php-getid3, during repack. Closes: #701526
* Update package to use dh_linktree to make the needed sym links to the
needed system libs that were removed during repack.
* Update debian/rules to reflect upstreams removing/moving of modules.
* Update debian/ampache-common.install to reflect upstreams removal of files.
* Updated to use new apache2.4 API. Closes: #669756
* Updated /debian/po/de.po thx David Prévot for the patch. Closes: #691963
* M3U import is now ordered, fixed upstream. Closes: #684984
* Text input area has been resized so IPv6 addresses will now fit, fixed
upstream. Closes: #716230
* Added ampache-common.preinst to make sure that the courtousy copies of code
dirs are empty so dh_linktree can do it's magic on upgrades.
* Correct typo in ampache-common.postrm.
* Remove courtousy copy of php-getid3, during repack. Closes: #701526
* Update package to use dh_linktree to make the needed sym links to the
needed system libs that were removed during repack.
* Update debian/rules to reflect upstreams removing/moving of modules.
* Update debian/ampache-common.install to reflect upstreams removal of files.
* Updated to use new apache2.4 API. Closes: #669756
* Updated /debian/po/de.po thx David Prévot for the patch. Closes: #691963
* M3U import is now ordered, fixed upstream. Closes: #684984
* Text input area has been resized so IPv6 addresses will now fit, fixed
upstream. Closes: #716230
* Added ampache-common.preinst to make sure that the courtousy copies of code
dirs are empty so dh_linktree can do it's magic on upgrades.
- files added:
- .gitignore
- .pc/03_apache2.4.patch
- .pc/03_apache2.4.patch/config
- modules/snoopy
- modules/whatever_hover
- files removed:
- .pc/01_logrotate.patch
- .pc/01_logrotate.patch/lib
- debian/scripts
- modules/flash
- modules/flash/Original
- modules/getid3/docs
- modules/nusoap
- modules/phpmailer/docs
- modules/phpmailer/extras
- modules/phpmailer/language
- modules/prototype
- modules/validatemail
- files modified:
- .pc/applied-patches
added
removed
modules/getid3/module.audio.mp3.php
1
<?php
2
/////////////////////////////////////////////////////////////////
3
/// getID3() by James Heinrich <info@getid3.org> //
4
// available at http://getid3.sourceforge.net //
5
// or http://www.getid3.org //
6
/////////////////////////////////////////////////////////////////
7
// See readme.txt for more details //
8
/////////////////////////////////////////////////////////////////
9
// //
10
// module.audio.mp3.php //
11
// module for analyzing MP3 files //
12
// dependencies: NONE //
13
// ///
14
/////////////////////////////////////////////////////////////////
15
16
17
// number of frames to scan to determine if MPEG-audio sequence is valid
18
// Lower this number to 5-20 for faster scanning
19
// Increase this number to 50+ for most accurate detection of valid VBR/CBR
20
// mpeg-audio streams
21
define('GETID3_MP3_VALID_CHECK_FRAMES', 35);
22
23
24
class getid3_mp3 extends getid3_handler
25
{
26
27
var $allow_bruteforce = false; // forces getID3() to scan the file byte-by-byte and log all the valid audio frame headers - extremely slow, unrecommended, but may provide data from otherwise-unusuable files
28
29
function Analyze() {
30
$info = &$this->getid3->info;
31
32
$initialOffset = $info['avdataoffset'];
33
34
if (!$this->getOnlyMPEGaudioInfo($info['avdataoffset'])) {
35
if ($this->allow_bruteforce) {
36
$info['error'][] = 'Rescanning file in BruteForce mode';
37
$this->getOnlyMPEGaudioInfoBruteForce($this->getid3->fp, $info);
38
}
39
}
40
41
42
if (isset($info['mpeg']['audio']['bitrate_mode'])) {
43
$info['audio']['bitrate_mode'] = strtolower($info['mpeg']['audio']['bitrate_mode']);
44
}
45
46
if (((isset($info['id3v2']['headerlength']) && ($info['avdataoffset'] > $info['id3v2']['headerlength'])) || (!isset($info['id3v2']) && ($info['avdataoffset'] > 0) && ($info['avdataoffset'] != $initialOffset)))) {
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48
$synchoffsetwarning = 'Unknown data before synch ';
49
if (isset($info['id3v2']['headerlength'])) {
50
$synchoffsetwarning .= '(ID3v2 header ends at '.$info['id3v2']['headerlength'].', then '.($info['avdataoffset'] - $info['id3v2']['headerlength']).' bytes garbage, ';
51
} elseif ($initialOffset > 0) {
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$synchoffsetwarning .= '(should be at '.$initialOffset.', ';
53
} else {
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$synchoffsetwarning .= '(should be at beginning of file, ';
55
}
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$synchoffsetwarning .= 'synch detected at '.$info['avdataoffset'].')';
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if (isset($info['audio']['bitrate_mode']) && ($info['audio']['bitrate_mode'] == 'cbr')) {
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if (!empty($info['id3v2']['headerlength']) && (($info['avdataoffset'] - $info['id3v2']['headerlength']) == $info['mpeg']['audio']['framelength'])) {
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$synchoffsetwarning .= '. This is a known problem with some versions of LAME (3.90-3.92) DLL in CBR mode.';
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$info['audio']['codec'] = 'LAME';
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$CurrentDataLAMEversionString = 'LAME3.';
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} elseif (empty($info['id3v2']['headerlength']) && ($info['avdataoffset'] == $info['mpeg']['audio']['framelength'])) {
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$synchoffsetwarning .= '. This is a known problem with some versions of LAME (3.90 - 3.92) DLL in CBR mode.';
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$info['audio']['codec'] = 'LAME';
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$CurrentDataLAMEversionString = 'LAME3.';
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71
}
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73
}
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$info['warning'][] = $synchoffsetwarning;
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76
}
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if (isset($info['mpeg']['audio']['LAME'])) {
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$info['audio']['codec'] = 'LAME';
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if (!empty($info['mpeg']['audio']['LAME']['long_version'])) {
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$info['audio']['encoder'] = rtrim($info['mpeg']['audio']['LAME']['long_version'], "\x00");
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} elseif (!empty($info['mpeg']['audio']['LAME']['short_version'])) {
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$info['audio']['encoder'] = rtrim($info['mpeg']['audio']['LAME']['short_version'], "\x00");
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}
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}
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$CurrentDataLAMEversionString = (!empty($CurrentDataLAMEversionString) ? $CurrentDataLAMEversionString : (isset($info['audio']['encoder']) ? $info['audio']['encoder'] : ''));
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if (!empty($CurrentDataLAMEversionString) && (substr($CurrentDataLAMEversionString, 0, 6) == 'LAME3.') && !preg_match('[0-9\)]', substr($CurrentDataLAMEversionString, -1))) {
89
// a version number of LAME that does not end with a number like "LAME3.92"
90
// or with a closing parenthesis like "LAME3.88 (alpha)"
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// or a version of LAME with the LAMEtag-not-filled-in-DLL-mode bug (3.90-3.92)
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// not sure what the actual last frame length will be, but will be less than or equal to 1441
94
$PossiblyLongerLAMEversion_FrameLength = 1441;
95
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// Not sure what version of LAME this is - look in padding of last frame for longer version string
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$PossibleLAMEversionStringOffset = $info['avdataend'] - $PossiblyLongerLAMEversion_FrameLength;
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fseek($this->getid3->fp, $PossibleLAMEversionStringOffset);
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$PossiblyLongerLAMEversion_Data = fread($this->getid3->fp, $PossiblyLongerLAMEversion_FrameLength);
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switch (substr($CurrentDataLAMEversionString, -1)) {
101
case 'a':
102
case 'b':
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// "LAME3.94a" will have a longer version string of "LAME3.94 (alpha)" for example
104
// need to trim off "a" to match longer string
105
$CurrentDataLAMEversionString = substr($CurrentDataLAMEversionString, 0, -1);
106
break;
107
}
108
if (($PossiblyLongerLAMEversion_String = strstr($PossiblyLongerLAMEversion_Data, $CurrentDataLAMEversionString)) !== false) {
109
if (substr($PossiblyLongerLAMEversion_String, 0, strlen($CurrentDataLAMEversionString)) == $CurrentDataLAMEversionString) {
110
$PossiblyLongerLAMEversion_NewString = substr($PossiblyLongerLAMEversion_String, 0, strspn($PossiblyLongerLAMEversion_String, 'LAME0123456789., (abcdefghijklmnopqrstuvwxyzJFSOND)')); //"LAME3.90.3" "LAME3.87 (beta 1, Sep 27 2000)" "LAME3.88 (beta)"
111
if (empty($info['audio']['encoder']) || (strlen($PossiblyLongerLAMEversion_NewString) > strlen($info['audio']['encoder']))) {
112
$info['audio']['encoder'] = $PossiblyLongerLAMEversion_NewString;
113
}
114
}
115
}
116
}
117
if (!empty($info['audio']['encoder'])) {
118
$info['audio']['encoder'] = rtrim($info['audio']['encoder'], "\x00 ");
119
}
120
121
switch (isset($info['mpeg']['audio']['layer']) ? $info['mpeg']['audio']['layer'] : '') {
122
case 1:
123
case 2:
124
$info['audio']['dataformat'] = 'mp'.$info['mpeg']['audio']['layer'];
125
break;
126
}
127
if (isset($info['fileformat']) && ($info['fileformat'] == 'mp3')) {
128
switch ($info['audio']['dataformat']) {
129
case 'mp1':
130
case 'mp2':
131
case 'mp3':
132
$info['fileformat'] = $info['audio']['dataformat'];
133
break;
134
135
default:
136
$info['warning'][] = 'Expecting [audio][dataformat] to be mp1/mp2/mp3 when fileformat == mp3, [audio][dataformat] actually "'.$info['audio']['dataformat'].'"';
137
break;
138
}
139
}
140
141
if (empty($info['fileformat'])) {
142
unset($info['fileformat']);
143
unset($info['audio']['bitrate_mode']);
144
unset($info['avdataoffset']);
145
unset($info['avdataend']);
146
return false;
147
}
148
149
$info['mime_type'] = 'audio/mpeg';
150
$info['audio']['lossless'] = false;
151
152
// Calculate playtime
153
if (!isset($info['playtime_seconds']) && isset($info['audio']['bitrate']) && ($info['audio']['bitrate'] > 0)) {
154
$info['playtime_seconds'] = ($info['avdataend'] - $info['avdataoffset']) * 8 / $info['audio']['bitrate'];
155
}
156
157
$info['audio']['encoder_options'] = $this->GuessEncoderOptions();
158
159
return true;
160
}
161
162
163
function GuessEncoderOptions() {
164
// shortcuts
165
$info = &$this->getid3->info;
166
if (!empty($info['mpeg']['audio'])) {
167
$thisfile_mpeg_audio = &$info['mpeg']['audio'];
168
if (!empty($thisfile_mpeg_audio['LAME'])) {
169
$thisfile_mpeg_audio_lame = &$thisfile_mpeg_audio['LAME'];
170
}
171
}
172
173
$encoder_options = '';
174
static $NamedPresetBitrates = array(16, 24, 40, 56, 112, 128, 160, 192, 256);
175
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if (isset($thisfile_mpeg_audio['VBR_method']) && ($thisfile_mpeg_audio['VBR_method'] == 'Fraunhofer') && !empty($thisfile_mpeg_audio['VBR_quality'])) {
177
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$encoder_options = 'VBR q'.$thisfile_mpeg_audio['VBR_quality'];
179
180
} elseif (!empty($thisfile_mpeg_audio_lame['preset_used']) && (!in_array($thisfile_mpeg_audio_lame['preset_used_id'], $NamedPresetBitrates))) {
181
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$encoder_options = $thisfile_mpeg_audio_lame['preset_used'];
183
184
} elseif (!empty($thisfile_mpeg_audio_lame['vbr_quality'])) {
185
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static $KnownEncoderValues = array();
187
if (empty($KnownEncoderValues)) {
188
189
//$KnownEncoderValues[abrbitrate_minbitrate][vbr_quality][raw_vbr_method][raw_noise_shaping][raw_stereo_mode][ath_type][lowpass_frequency] = 'preset name';
190
$KnownEncoderValues[0xFF][58][1][1][3][2][20500] = '--alt-preset insane'; // 3.90, 3.90.1, 3.92
191
$KnownEncoderValues[0xFF][58][1][1][3][2][20600] = '--alt-preset insane'; // 3.90.2, 3.90.3, 3.91
192
$KnownEncoderValues[0xFF][57][1][1][3][4][20500] = '--alt-preset insane'; // 3.94, 3.95
193
$KnownEncoderValues['**'][78][3][2][3][2][19500] = '--alt-preset extreme'; // 3.90, 3.90.1, 3.92
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$KnownEncoderValues['**'][78][3][2][3][2][19600] = '--alt-preset extreme'; // 3.90.2, 3.91
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$KnownEncoderValues['**'][78][3][1][3][2][19600] = '--alt-preset extreme'; // 3.90.3
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$KnownEncoderValues['**'][78][4][2][3][2][19500] = '--alt-preset fast extreme'; // 3.90, 3.90.1, 3.92
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$KnownEncoderValues['**'][78][4][2][3][2][19600] = '--alt-preset fast extreme'; // 3.90.2, 3.90.3, 3.91
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$KnownEncoderValues['**'][78][3][2][3][4][19000] = '--alt-preset standard'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92
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$KnownEncoderValues['**'][78][3][1][3][4][19000] = '--alt-preset standard'; // 3.90.3
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$KnownEncoderValues['**'][78][4][2][3][4][19000] = '--alt-preset fast standard'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92
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$KnownEncoderValues['**'][78][4][1][3][4][19000] = '--alt-preset fast standard'; // 3.90.3
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$KnownEncoderValues['**'][88][4][1][3][3][19500] = '--r3mix'; // 3.90, 3.90.1, 3.92
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$KnownEncoderValues['**'][88][4][1][3][3][19600] = '--r3mix'; // 3.90.2, 3.90.3, 3.91
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$KnownEncoderValues['**'][67][4][1][3][4][18000] = '--r3mix'; // 3.94, 3.95
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$KnownEncoderValues['**'][68][3][2][3][4][18000] = '--alt-preset medium'; // 3.90.3
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$KnownEncoderValues['**'][68][4][2][3][4][18000] = '--alt-preset fast medium'; // 3.90.3
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$KnownEncoderValues[0xFF][99][1][1][1][2][0] = '--preset studio'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92
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$KnownEncoderValues[0xFF][58][2][1][3][2][20600] = '--preset studio'; // 3.90.3, 3.93.1
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$KnownEncoderValues[0xFF][58][2][1][3][2][20500] = '--preset studio'; // 3.93
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$KnownEncoderValues[0xFF][57][2][1][3][4][20500] = '--preset studio'; // 3.94, 3.95
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$KnownEncoderValues[0xC0][88][1][1][1][2][0] = '--preset cd'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92
213
$KnownEncoderValues[0xC0][58][2][2][3][2][19600] = '--preset cd'; // 3.90.3, 3.93.1
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$KnownEncoderValues[0xC0][58][2][2][3][2][19500] = '--preset cd'; // 3.93
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$KnownEncoderValues[0xC0][57][2][1][3][4][19500] = '--preset cd'; // 3.94, 3.95
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$KnownEncoderValues[0xA0][78][1][1][3][2][18000] = '--preset hifi'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92
217
$KnownEncoderValues[0xA0][58][2][2][3][2][18000] = '--preset hifi'; // 3.90.3, 3.93, 3.93.1
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$KnownEncoderValues[0xA0][57][2][1][3][4][18000] = '--preset hifi'; // 3.94, 3.95
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$KnownEncoderValues[0x80][67][1][1][3][2][18000] = '--preset tape'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92
220
$KnownEncoderValues[0x80][67][1][1][3][2][15000] = '--preset radio'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92
221
$KnownEncoderValues[0x70][67][1][1][3][2][15000] = '--preset fm'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92
222
$KnownEncoderValues[0x70][58][2][2][3][2][16000] = '--preset tape/radio/fm'; // 3.90.3, 3.93, 3.93.1
223
$KnownEncoderValues[0x70][57][2][1][3][4][16000] = '--preset tape/radio/fm'; // 3.94, 3.95
224
$KnownEncoderValues[0x38][58][2][2][0][2][10000] = '--preset voice'; // 3.90.3, 3.93, 3.93.1
225
$KnownEncoderValues[0x38][57][2][1][0][4][15000] = '--preset voice'; // 3.94, 3.95
226
$KnownEncoderValues[0x38][57][2][1][0][4][16000] = '--preset voice'; // 3.94a14
227
$KnownEncoderValues[0x28][65][1][1][0][2][7500] = '--preset mw-us'; // 3.90, 3.90.1, 3.92
228
$KnownEncoderValues[0x28][65][1][1][0][2][7600] = '--preset mw-us'; // 3.90.2, 3.91
229
$KnownEncoderValues[0x28][58][2][2][0][2][7000] = '--preset mw-us'; // 3.90.3, 3.93, 3.93.1
230
$KnownEncoderValues[0x28][57][2][1][0][4][10500] = '--preset mw-us'; // 3.94, 3.95
231
$KnownEncoderValues[0x28][57][2][1][0][4][11200] = '--preset mw-us'; // 3.94a14
232
$KnownEncoderValues[0x28][57][2][1][0][4][8800] = '--preset mw-us'; // 3.94a15
233
$KnownEncoderValues[0x18][58][2][2][0][2][4000] = '--preset phon+/lw/mw-eu/sw'; // 3.90.3, 3.93.1
234
$KnownEncoderValues[0x18][58][2][2][0][2][3900] = '--preset phon+/lw/mw-eu/sw'; // 3.93
235
$KnownEncoderValues[0x18][57][2][1][0][4][5900] = '--preset phon+/lw/mw-eu/sw'; // 3.94, 3.95
236
$KnownEncoderValues[0x18][57][2][1][0][4][6200] = '--preset phon+/lw/mw-eu/sw'; // 3.94a14
237
$KnownEncoderValues[0x18][57][2][1][0][4][3200] = '--preset phon+/lw/mw-eu/sw'; // 3.94a15
238
$KnownEncoderValues[0x10][58][2][2][0][2][3800] = '--preset phone'; // 3.90.3, 3.93.1
239
$KnownEncoderValues[0x10][58][2][2][0][2][3700] = '--preset phone'; // 3.93
240
$KnownEncoderValues[0x10][57][2][1][0][4][5600] = '--preset phone'; // 3.94, 3.95
241
}
242
243
if (isset($KnownEncoderValues[$thisfile_mpeg_audio_lame['raw']['abrbitrate_minbitrate']][$thisfile_mpeg_audio_lame['vbr_quality']][$thisfile_mpeg_audio_lame['raw']['vbr_method']][$thisfile_mpeg_audio_lame['raw']['noise_shaping']][$thisfile_mpeg_audio_lame['raw']['stereo_mode']][$thisfile_mpeg_audio_lame['ath_type']][$thisfile_mpeg_audio_lame['lowpass_frequency']])) {
244
245
$encoder_options = $KnownEncoderValues[$thisfile_mpeg_audio_lame['raw']['abrbitrate_minbitrate']][$thisfile_mpeg_audio_lame['vbr_quality']][$thisfile_mpeg_audio_lame['raw']['vbr_method']][$thisfile_mpeg_audio_lame['raw']['noise_shaping']][$thisfile_mpeg_audio_lame['raw']['stereo_mode']][$thisfile_mpeg_audio_lame['ath_type']][$thisfile_mpeg_audio_lame['lowpass_frequency']];
246
247
} elseif (isset($KnownEncoderValues['**'][$thisfile_mpeg_audio_lame['vbr_quality']][$thisfile_mpeg_audio_lame['raw']['vbr_method']][$thisfile_mpeg_audio_lame['raw']['noise_shaping']][$thisfile_mpeg_audio_lame['raw']['stereo_mode']][$thisfile_mpeg_audio_lame['ath_type']][$thisfile_mpeg_audio_lame['lowpass_frequency']])) {
248
249
$encoder_options = $KnownEncoderValues['**'][$thisfile_mpeg_audio_lame['vbr_quality']][$thisfile_mpeg_audio_lame['raw']['vbr_method']][$thisfile_mpeg_audio_lame['raw']['noise_shaping']][$thisfile_mpeg_audio_lame['raw']['stereo_mode']][$thisfile_mpeg_audio_lame['ath_type']][$thisfile_mpeg_audio_lame['lowpass_frequency']];
250
251
} elseif ($info['audio']['bitrate_mode'] == 'vbr') {
252
253
// http://gabriel.mp3-tech.org/mp3infotag.html
254
// int Quality = (100 - 10 * gfp->VBR_q - gfp->quality)h
255
256
257
$LAME_V_value = 10 - ceil($thisfile_mpeg_audio_lame['vbr_quality'] / 10);
258
$LAME_q_value = 100 - $thisfile_mpeg_audio_lame['vbr_quality'] - ($LAME_V_value * 10);
259
$encoder_options = '-V'.$LAME_V_value.' -q'.$LAME_q_value;
260
261
} elseif ($info['audio']['bitrate_mode'] == 'cbr') {
262
263
$encoder_options = strtoupper($info['audio']['bitrate_mode']).ceil($info['audio']['bitrate'] / 1000);
264
265
} else {
266
267
$encoder_options = strtoupper($info['audio']['bitrate_mode']);
268
269
}
270
271
} elseif (!empty($thisfile_mpeg_audio_lame['bitrate_abr'])) {
272
273
$encoder_options = 'ABR'.$thisfile_mpeg_audio_lame['bitrate_abr'];
274
275
} elseif (!empty($info['audio']['bitrate'])) {
276
277
if ($info['audio']['bitrate_mode'] == 'cbr') {
278
$encoder_options = strtoupper($info['audio']['bitrate_mode']).ceil($info['audio']['bitrate'] / 1000);
279
} else {
280
$encoder_options = strtoupper($info['audio']['bitrate_mode']);
281
}
282
283
}
284
if (!empty($thisfile_mpeg_audio_lame['bitrate_min'])) {
285
$encoder_options .= ' -b'.$thisfile_mpeg_audio_lame['bitrate_min'];
286
}
287
288
if (!empty($thisfile_mpeg_audio_lame['encoding_flags']['nogap_prev']) || !empty($thisfile_mpeg_audio_lame['encoding_flags']['nogap_next'])) {
289
$encoder_options .= ' --nogap';
290
}
291
292
if (!empty($thisfile_mpeg_audio_lame['lowpass_frequency'])) {
293
$ExplodedOptions = explode(' ', $encoder_options, 4);
294
if ($ExplodedOptions[0] == '--r3mix') {
295
$ExplodedOptions[1] = 'r3mix';
296
}
297
switch ($ExplodedOptions[0]) {
298
case '--preset':
299
case '--alt-preset':
300
case '--r3mix':
301
if ($ExplodedOptions[1] == 'fast') {
302
$ExplodedOptions[1] .= ' '.$ExplodedOptions[2];
303
}
304
switch ($ExplodedOptions[1]) {
305
case 'portable':
306
case 'medium':
307
case 'standard':
308
case 'extreme':
309
case 'insane':
310
case 'fast portable':
311
case 'fast medium':
312
case 'fast standard':
313
case 'fast extreme':
314
case 'fast insane':
315
case 'r3mix':
316
static $ExpectedLowpass = array(
317
'insane|20500' => 20500,
318
'insane|20600' => 20600, // 3.90.2, 3.90.3, 3.91
319
'medium|18000' => 18000,
320
'fast medium|18000' => 18000,
321
'extreme|19500' => 19500, // 3.90, 3.90.1, 3.92, 3.95
322
'extreme|19600' => 19600, // 3.90.2, 3.90.3, 3.91, 3.93.1
323
'fast extreme|19500' => 19500, // 3.90, 3.90.1, 3.92, 3.95
324
'fast extreme|19600' => 19600, // 3.90.2, 3.90.3, 3.91, 3.93.1
325
'standard|19000' => 19000,
326
'fast standard|19000' => 19000,
327
'r3mix|19500' => 19500, // 3.90, 3.90.1, 3.92
328
'r3mix|19600' => 19600, // 3.90.2, 3.90.3, 3.91
329
'r3mix|18000' => 18000, // 3.94, 3.95
330
);
331
if (!isset($ExpectedLowpass[$ExplodedOptions[1].'|'.$thisfile_mpeg_audio_lame['lowpass_frequency']]) && ($thisfile_mpeg_audio_lame['lowpass_frequency'] < 22050) && (round($thisfile_mpeg_audio_lame['lowpass_frequency'] / 1000) < round($thisfile_mpeg_audio['sample_rate'] / 2000))) {
332
$encoder_options .= ' --lowpass '.$thisfile_mpeg_audio_lame['lowpass_frequency'];
333
}
334
break;
335
336
default:
337
break;
338
}
339
break;
340
}
341
}
342
343
if (isset($thisfile_mpeg_audio_lame['raw']['source_sample_freq'])) {
344
if (($thisfile_mpeg_audio['sample_rate'] == 44100) && ($thisfile_mpeg_audio_lame['raw']['source_sample_freq'] != 1)) {
345
$encoder_options .= ' --resample 44100';
346
} elseif (($thisfile_mpeg_audio['sample_rate'] == 48000) && ($thisfile_mpeg_audio_lame['raw']['source_sample_freq'] != 2)) {
347
$encoder_options .= ' --resample 48000';
348
} elseif ($thisfile_mpeg_audio['sample_rate'] < 44100) {
349
switch ($thisfile_mpeg_audio_lame['raw']['source_sample_freq']) {
350
case 0: // <= 32000
351
// may or may not be same as source frequency - ignore
352
break;
353
case 1: // 44100
354
case 2: // 48000
355
case 3: // 48000+
356
$ExplodedOptions = explode(' ', $encoder_options, 4);
357
switch ($ExplodedOptions[0]) {
358
case '--preset':
359
case '--alt-preset':
360
switch ($ExplodedOptions[1]) {
361
case 'fast':
362
case 'portable':
363
case 'medium':
364
case 'standard':
365
case 'extreme':
366
case 'insane':
367
$encoder_options .= ' --resample '.$thisfile_mpeg_audio['sample_rate'];
368
break;
369
370
default:
371
static $ExpectedResampledRate = array(
372
'phon+/lw/mw-eu/sw|16000' => 16000,
373
'mw-us|24000' => 24000, // 3.95
374
'mw-us|32000' => 32000, // 3.93
375
'mw-us|16000' => 16000, // 3.92
376
'phone|16000' => 16000,
377
'phone|11025' => 11025, // 3.94a15
378
'radio|32000' => 32000, // 3.94a15
379
'fm/radio|32000' => 32000, // 3.92
380
'fm|32000' => 32000, // 3.90
381
'voice|32000' => 32000);
382
if (!isset($ExpectedResampledRate[$ExplodedOptions[1].'|'.$thisfile_mpeg_audio['sample_rate']])) {
383
$encoder_options .= ' --resample '.$thisfile_mpeg_audio['sample_rate'];
384
}
385
break;
386
}
387
break;
388
389
case '--r3mix':
390
default:
391
$encoder_options .= ' --resample '.$thisfile_mpeg_audio['sample_rate'];
392
break;
393
}
394
break;
395
}
396
}
397
}
398
if (empty($encoder_options) && !empty($info['audio']['bitrate']) && !empty($info['audio']['bitrate_mode'])) {
399
//$encoder_options = strtoupper($info['audio']['bitrate_mode']).ceil($info['audio']['bitrate'] / 1000);
400
$encoder_options = strtoupper($info['audio']['bitrate_mode']);
401
}
402
403
return $encoder_options;
404
}
405
406
407
function decodeMPEGaudioHeader($offset, &$info, $recursivesearch=true, $ScanAsCBR=false, $FastMPEGheaderScan=false) {
408
static $MPEGaudioVersionLookup;
409
static $MPEGaudioLayerLookup;
410
static $MPEGaudioBitrateLookup;
411
static $MPEGaudioFrequencyLookup;
412
static $MPEGaudioChannelModeLookup;
413
static $MPEGaudioModeExtensionLookup;
414
static $MPEGaudioEmphasisLookup;
415
if (empty($MPEGaudioVersionLookup)) {
416
$MPEGaudioVersionLookup = getid3_mp3::MPEGaudioVersionArray();
417
$MPEGaudioLayerLookup = getid3_mp3::MPEGaudioLayerArray();
418
$MPEGaudioBitrateLookup = getid3_mp3::MPEGaudioBitrateArray();
419
$MPEGaudioFrequencyLookup = getid3_mp3::MPEGaudioFrequencyArray();
420
$MPEGaudioChannelModeLookup = getid3_mp3::MPEGaudioChannelModeArray();
421
$MPEGaudioModeExtensionLookup = getid3_mp3::MPEGaudioModeExtensionArray();
422
$MPEGaudioEmphasisLookup = getid3_mp3::MPEGaudioEmphasisArray();
423
}
424
425
if (fseek($this->getid3->fp, $offset, SEEK_SET) != 0) {
426
$info['error'][] = 'decodeMPEGaudioHeader() failed to seek to next offset at '.$offset;
427
return false;
428
}
429
//$headerstring = fread($this->getid3->fp, 1441); // worst-case max length = 32kHz @ 320kbps layer 3 = 1441 bytes/frame
430
$headerstring = fread($this->getid3->fp, 226); // LAME header at offset 36 + 190 bytes of Xing/LAME data
431
432
// MP3 audio frame structure:
433
// $aa $aa $aa $aa [$bb $bb] $cc...
434
// where $aa..$aa is the four-byte mpeg-audio header (below)
435
// $bb $bb is the optional 2-byte CRC
436
// and $cc... is the audio data
437
438
$head4 = substr($headerstring, 0, 4);
439
440
static $MPEGaudioHeaderDecodeCache = array();
441
if (isset($MPEGaudioHeaderDecodeCache[$head4])) {
442
$MPEGheaderRawArray = $MPEGaudioHeaderDecodeCache[$head4];
443
} else {
444
$MPEGheaderRawArray = getid3_mp3::MPEGaudioHeaderDecode($head4);
445
$MPEGaudioHeaderDecodeCache[$head4] = $MPEGheaderRawArray;
446
}
447
448
static $MPEGaudioHeaderValidCache = array();
449
if (!isset($MPEGaudioHeaderValidCache[$head4])) { // Not in cache
450
//$MPEGaudioHeaderValidCache[$head4] = getid3_mp3::MPEGaudioHeaderValid($MPEGheaderRawArray, false, true); // allow badly-formatted freeformat (from LAME 3.90 - 3.93.1)
451
$MPEGaudioHeaderValidCache[$head4] = getid3_mp3::MPEGaudioHeaderValid($MPEGheaderRawArray, false, false);
452
}
453
454
// shortcut
455
if (!isset($info['mpeg']['audio'])) {
456
$info['mpeg']['audio'] = array();
457
}
458
$thisfile_mpeg_audio = &$info['mpeg']['audio'];
459
460
461
if ($MPEGaudioHeaderValidCache[$head4]) {
462
$thisfile_mpeg_audio['raw'] = $MPEGheaderRawArray;
463
} else {
464
$info['error'][] = 'Invalid MPEG audio header ('.getid3_lib::PrintHexBytes($head4).') at offset '.$offset;
465
return false;
466
}
467
468
if (!$FastMPEGheaderScan) {
469
$thisfile_mpeg_audio['version'] = $MPEGaudioVersionLookup[$thisfile_mpeg_audio['raw']['version']];
470
$thisfile_mpeg_audio['layer'] = $MPEGaudioLayerLookup[$thisfile_mpeg_audio['raw']['layer']];
471
472
$thisfile_mpeg_audio['channelmode'] = $MPEGaudioChannelModeLookup[$thisfile_mpeg_audio['raw']['channelmode']];
473
$thisfile_mpeg_audio['channels'] = (($thisfile_mpeg_audio['channelmode'] == 'mono') ? 1 : 2);
474
$thisfile_mpeg_audio['sample_rate'] = $MPEGaudioFrequencyLookup[$thisfile_mpeg_audio['version']][$thisfile_mpeg_audio['raw']['sample_rate']];
475
$thisfile_mpeg_audio['protection'] = !$thisfile_mpeg_audio['raw']['protection'];
476
$thisfile_mpeg_audio['private'] = (bool) $thisfile_mpeg_audio['raw']['private'];
477
$thisfile_mpeg_audio['modeextension'] = $MPEGaudioModeExtensionLookup[$thisfile_mpeg_audio['layer']][$thisfile_mpeg_audio['raw']['modeextension']];
478
$thisfile_mpeg_audio['copyright'] = (bool) $thisfile_mpeg_audio['raw']['copyright'];
479
$thisfile_mpeg_audio['original'] = (bool) $thisfile_mpeg_audio['raw']['original'];
480
$thisfile_mpeg_audio['emphasis'] = $MPEGaudioEmphasisLookup[$thisfile_mpeg_audio['raw']['emphasis']];
481
482
$info['audio']['channels'] = $thisfile_mpeg_audio['channels'];
483
$info['audio']['sample_rate'] = $thisfile_mpeg_audio['sample_rate'];
484
485
if ($thisfile_mpeg_audio['protection']) {
486
$thisfile_mpeg_audio['crc'] = getid3_lib::BigEndian2Int(substr($headerstring, 4, 2));
487
}
488
}
489
490
if ($thisfile_mpeg_audio['raw']['bitrate'] == 15) {
491
// http://www.hydrogenaudio.org/?act=ST&f=16&t=9682&st=0
492
$info['warning'][] = 'Invalid bitrate index (15), this is a known bug in free-format MP3s encoded by LAME v3.90 - 3.93.1';
493
$thisfile_mpeg_audio['raw']['bitrate'] = 0;
494
}
495
$thisfile_mpeg_audio['padding'] = (bool) $thisfile_mpeg_audio['raw']['padding'];
496
$thisfile_mpeg_audio['bitrate'] = $MPEGaudioBitrateLookup[$thisfile_mpeg_audio['version']][$thisfile_mpeg_audio['layer']][$thisfile_mpeg_audio['raw']['bitrate']];
497
498
if (($thisfile_mpeg_audio['bitrate'] == 'free') && ($offset == $info['avdataoffset'])) {
499
// only skip multiple frame check if free-format bitstream found at beginning of file
500
// otherwise is quite possibly simply corrupted data
501
$recursivesearch = false;
502
}
503
504
// For Layer 2 there are some combinations of bitrate and mode which are not allowed.
505
if (!$FastMPEGheaderScan && ($thisfile_mpeg_audio['layer'] == '2')) {
506
507
$info['audio']['dataformat'] = 'mp2';
508
switch ($thisfile_mpeg_audio['channelmode']) {
509
510
case 'mono':
511
if (($thisfile_mpeg_audio['bitrate'] == 'free') || ($thisfile_mpeg_audio['bitrate'] <= 192000)) {
512
// these are ok
513
} else {
514
$info['error'][] = $thisfile_mpeg_audio['bitrate'].'kbps not allowed in Layer 2, '.$thisfile_mpeg_audio['channelmode'].'.';
515
return false;
516
}
517
break;
518
519
case 'stereo':
520
case 'joint stereo':
521
case 'dual channel':
522
if (($thisfile_mpeg_audio['bitrate'] == 'free') || ($thisfile_mpeg_audio['bitrate'] == 64000) || ($thisfile_mpeg_audio['bitrate'] >= 96000)) {
523
// these are ok
524
} else {
525
$info['error'][] = intval(round($thisfile_mpeg_audio['bitrate'] / 1000)).'kbps not allowed in Layer 2, '.$thisfile_mpeg_audio['channelmode'].'.';
526
return false;
527
}
528
break;
529
530
}
531
532
}
533
534
535
if ($info['audio']['sample_rate'] > 0) {
536
$thisfile_mpeg_audio['framelength'] = getid3_mp3::MPEGaudioFrameLength($thisfile_mpeg_audio['bitrate'], $thisfile_mpeg_audio['version'], $thisfile_mpeg_audio['layer'], (int) $thisfile_mpeg_audio['padding'], $info['audio']['sample_rate']);
537
}
538
539
$nextframetestoffset = $offset + 1;
540
if ($thisfile_mpeg_audio['bitrate'] != 'free') {
541
542
$info['audio']['bitrate'] = $thisfile_mpeg_audio['bitrate'];
543
544
if (isset($thisfile_mpeg_audio['framelength'])) {
545
$nextframetestoffset = $offset + $thisfile_mpeg_audio['framelength'];
546
} else {
547
$info['error'][] = 'Frame at offset('.$offset.') is has an invalid frame length.';
548
return false;
549
}
550
551
}
552
553
$ExpectedNumberOfAudioBytes = 0;
554
555
////////////////////////////////////////////////////////////////////////////////////
556
// Variable-bitrate headers
557
558
if (substr($headerstring, 4 + 32, 4) == 'VBRI') {
559
// Fraunhofer VBR header is hardcoded 'VBRI' at offset 0x24 (36)
560
// specs taken from http://minnie.tuhs.org/pipermail/mp3encoder/2001-January/001800.html
561
562
$thisfile_mpeg_audio['bitrate_mode'] = 'vbr';
563
$thisfile_mpeg_audio['VBR_method'] = 'Fraunhofer';
564
$info['audio']['codec'] = 'Fraunhofer';
565
566
$SideInfoData = substr($headerstring, 4 + 2, 32);
567
568
$FraunhoferVBROffset = 36;
569
570
$thisfile_mpeg_audio['VBR_encoder_version'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 4, 2)); // VbriVersion
571
$thisfile_mpeg_audio['VBR_encoder_delay'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 6, 2)); // VbriDelay
572
$thisfile_mpeg_audio['VBR_quality'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 8, 2)); // VbriQuality
573
$thisfile_mpeg_audio['VBR_bytes'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 10, 4)); // VbriStreamBytes
574
$thisfile_mpeg_audio['VBR_frames'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 14, 4)); // VbriStreamFrames
575
$thisfile_mpeg_audio['VBR_seek_offsets'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 18, 2)); // VbriTableSize
576
$thisfile_mpeg_audio['VBR_seek_scale'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 20, 2)); // VbriTableScale
577
$thisfile_mpeg_audio['VBR_entry_bytes'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 22, 2)); // VbriEntryBytes
578
$thisfile_mpeg_audio['VBR_entry_frames'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 24, 2)); // VbriEntryFrames
579
580
$ExpectedNumberOfAudioBytes = $thisfile_mpeg_audio['VBR_bytes'];
581
582
$previousbyteoffset = $offset;
583
for ($i = 0; $i < $thisfile_mpeg_audio['VBR_seek_offsets']; $i++) {
584
$Fraunhofer_OffsetN = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset, $thisfile_mpeg_audio['VBR_entry_bytes']));
585
$FraunhoferVBROffset += $thisfile_mpeg_audio['VBR_entry_bytes'];
586
$thisfile_mpeg_audio['VBR_offsets_relative'][$i] = ($Fraunhofer_OffsetN * $thisfile_mpeg_audio['VBR_seek_scale']);
587
$thisfile_mpeg_audio['VBR_offsets_absolute'][$i] = ($Fraunhofer_OffsetN * $thisfile_mpeg_audio['VBR_seek_scale']) + $previousbyteoffset;
588
$previousbyteoffset += $Fraunhofer_OffsetN;
589
}
590
591
592
} else {
593
594
// Xing VBR header is hardcoded 'Xing' at a offset 0x0D (13), 0x15 (21) or 0x24 (36)
595
// depending on MPEG layer and number of channels
596
597
$VBRidOffset = getid3_mp3::XingVBRidOffset($thisfile_mpeg_audio['version'], $thisfile_mpeg_audio['channelmode']);
598
$SideInfoData = substr($headerstring, 4 + 2, $VBRidOffset - 4);
599
600
if ((substr($headerstring, $VBRidOffset, strlen('Xing')) == 'Xing') || (substr($headerstring, $VBRidOffset, strlen('Info')) == 'Info')) {
601
// 'Xing' is traditional Xing VBR frame
602
// 'Info' is LAME-encoded CBR (This was done to avoid CBR files to be recognized as traditional Xing VBR files by some decoders.)
603
// 'Info' *can* legally be used to specify a VBR file as well, however.
604
605
// http://www.multiweb.cz/twoinches/MP3inside.htm
606
//00..03 = "Xing" or "Info"
607
//04..07 = Flags:
608
// 0x01 Frames Flag set if value for number of frames in file is stored
609
// 0x02 Bytes Flag set if value for filesize in bytes is stored
610
// 0x04 TOC Flag set if values for TOC are stored
611
// 0x08 VBR Scale Flag set if values for VBR scale is stored
612
//08..11 Frames: Number of frames in file (including the first Xing/Info one)
613
//12..15 Bytes: File length in Bytes
614
//16..115 TOC (Table of Contents):
615
// Contains of 100 indexes (one Byte length) for easier lookup in file. Approximately solves problem with moving inside file.
616
// Each Byte has a value according this formula:
617
// (TOC[i] / 256) * fileLenInBytes
618
// So if song lasts eg. 240 sec. and you want to jump to 60. sec. (and file is 5 000 000 Bytes length) you can use:
619
// TOC[(60/240)*100] = TOC[25]
620
// and corresponding Byte in file is then approximately at:
621
// (TOC[25]/256) * 5000000
622
//116..119 VBR Scale
623
624
625
// should be safe to leave this at 'vbr' and let it be overriden to 'cbr' if a CBR preset/mode is used by LAME
626
// if (substr($headerstring, $VBRidOffset, strlen('Info')) == 'Xing') {
627
$thisfile_mpeg_audio['bitrate_mode'] = 'vbr';
628
$thisfile_mpeg_audio['VBR_method'] = 'Xing';
629
// } else {
630
// $ScanAsCBR = true;
631
// $thisfile_mpeg_audio['bitrate_mode'] = 'cbr';
632
// }
633
634
$thisfile_mpeg_audio['xing_flags_raw'] = getid3_lib::BigEndian2Int(substr($headerstring, $VBRidOffset + 4, 4));
635
636
$thisfile_mpeg_audio['xing_flags']['frames'] = (bool) ($thisfile_mpeg_audio['xing_flags_raw'] & 0x00000001);
637
$thisfile_mpeg_audio['xing_flags']['bytes'] = (bool) ($thisfile_mpeg_audio['xing_flags_raw'] & 0x00000002);
638
$thisfile_mpeg_audio['xing_flags']['toc'] = (bool) ($thisfile_mpeg_audio['xing_flags_raw'] & 0x00000004);
639
$thisfile_mpeg_audio['xing_flags']['vbr_scale'] = (bool) ($thisfile_mpeg_audio['xing_flags_raw'] & 0x00000008);
640
641
if ($thisfile_mpeg_audio['xing_flags']['frames']) {
642
$thisfile_mpeg_audio['VBR_frames'] = getid3_lib::BigEndian2Int(substr($headerstring, $VBRidOffset + 8, 4));
643
//$thisfile_mpeg_audio['VBR_frames']--; // don't count header Xing/Info frame
644
}
645
if ($thisfile_mpeg_audio['xing_flags']['bytes']) {
646
$thisfile_mpeg_audio['VBR_bytes'] = getid3_lib::BigEndian2Int(substr($headerstring, $VBRidOffset + 12, 4));
647
}
648
649
//if (($thisfile_mpeg_audio['bitrate'] == 'free') && !empty($thisfile_mpeg_audio['VBR_frames']) && !empty($thisfile_mpeg_audio['VBR_bytes'])) {
650
if (!empty($thisfile_mpeg_audio['VBR_frames']) && !empty($thisfile_mpeg_audio['VBR_bytes'])) {
651
652
$framelengthfloat = $thisfile_mpeg_audio['VBR_bytes'] / $thisfile_mpeg_audio['VBR_frames'];
653
654
if ($thisfile_mpeg_audio['layer'] == '1') {
655
// BitRate = (((FrameLengthInBytes / 4) - Padding) * SampleRate) / 12
656
//$info['audio']['bitrate'] = ((($framelengthfloat / 4) - intval($thisfile_mpeg_audio['padding'])) * $thisfile_mpeg_audio['sample_rate']) / 12;
657
$info['audio']['bitrate'] = ($framelengthfloat / 4) * $thisfile_mpeg_audio['sample_rate'] * (2 / $info['audio']['channels']) / 12;
658
} else {
659
// Bitrate = ((FrameLengthInBytes - Padding) * SampleRate) / 144
660
//$info['audio']['bitrate'] = (($framelengthfloat - intval($thisfile_mpeg_audio['padding'])) * $thisfile_mpeg_audio['sample_rate']) / 144;
661
$info['audio']['bitrate'] = $framelengthfloat * $thisfile_mpeg_audio['sample_rate'] * (2 / $info['audio']['channels']) / 144;
662
}
663
$thisfile_mpeg_audio['framelength'] = floor($framelengthfloat);
664
}
665
666
if ($thisfile_mpeg_audio['xing_flags']['toc']) {
667
$LAMEtocData = substr($headerstring, $VBRidOffset + 16, 100);
668
for ($i = 0; $i < 100; $i++) {
669
$thisfile_mpeg_audio['toc'][$i] = ord($LAMEtocData{$i});
670
}
671
}
672
if ($thisfile_mpeg_audio['xing_flags']['vbr_scale']) {
673
$thisfile_mpeg_audio['VBR_scale'] = getid3_lib::BigEndian2Int(substr($headerstring, $VBRidOffset + 116, 4));
674
}
675
676
677
// http://gabriel.mp3-tech.org/mp3infotag.html
678
if (substr($headerstring, $VBRidOffset + 120, 4) == 'LAME') {
679
680
// shortcut
681
$thisfile_mpeg_audio['LAME'] = array();
682
$thisfile_mpeg_audio_lame = &$thisfile_mpeg_audio['LAME'];
683
684
685
$thisfile_mpeg_audio_lame['long_version'] = substr($headerstring, $VBRidOffset + 120, 20);
686
$thisfile_mpeg_audio_lame['short_version'] = substr($thisfile_mpeg_audio_lame['long_version'], 0, 9);
687
688
if ($thisfile_mpeg_audio_lame['short_version'] >= 'LAME3.90') {
689
690
// extra 11 chars are not part of version string when LAMEtag present
691
unset($thisfile_mpeg_audio_lame['long_version']);
692
693
// It the LAME tag was only introduced in LAME v3.90
694
// http://www.hydrogenaudio.org/?act=ST&f=15&t=9933
695
696
// Offsets of various bytes in http://gabriel.mp3-tech.org/mp3infotag.html
697
// are assuming a 'Xing' identifier offset of 0x24, which is the case for
698
// MPEG-1 non-mono, but not for other combinations
699
$LAMEtagOffsetContant = $VBRidOffset - 0x24;
700
701
// shortcuts
702
$thisfile_mpeg_audio_lame['RGAD'] = array('track'=>array(), 'album'=>array());
703
$thisfile_mpeg_audio_lame_RGAD = &$thisfile_mpeg_audio_lame['RGAD'];
704
$thisfile_mpeg_audio_lame_RGAD_track = &$thisfile_mpeg_audio_lame_RGAD['track'];
705
$thisfile_mpeg_audio_lame_RGAD_album = &$thisfile_mpeg_audio_lame_RGAD['album'];
706
$thisfile_mpeg_audio_lame['raw'] = array();
707
$thisfile_mpeg_audio_lame_raw = &$thisfile_mpeg_audio_lame['raw'];
708
709
// byte $9B VBR Quality
710
// This field is there to indicate a quality level, although the scale was not precised in the original Xing specifications.
711
// Actually overwrites original Xing bytes
712
unset($thisfile_mpeg_audio['VBR_scale']);
713
$thisfile_mpeg_audio_lame['vbr_quality'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0x9B, 1));
714
715
// bytes $9C-$A4 Encoder short VersionString
716
$thisfile_mpeg_audio_lame['short_version'] = substr($headerstring, $LAMEtagOffsetContant + 0x9C, 9);
717
718
// byte $A5 Info Tag revision + VBR method
719
$LAMEtagRevisionVBRmethod = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xA5, 1));
720
721
$thisfile_mpeg_audio_lame['tag_revision'] = ($LAMEtagRevisionVBRmethod & 0xF0) >> 4;
722
$thisfile_mpeg_audio_lame_raw['vbr_method'] = $LAMEtagRevisionVBRmethod & 0x0F;
723
$thisfile_mpeg_audio_lame['vbr_method'] = getid3_mp3::LAMEvbrMethodLookup($thisfile_mpeg_audio_lame_raw['vbr_method']);
724
$thisfile_mpeg_audio['bitrate_mode'] = substr($thisfile_mpeg_audio_lame['vbr_method'], 0, 3); // usually either 'cbr' or 'vbr', but truncates 'vbr-old / vbr-rh' to 'vbr'
725
726
// byte $A6 Lowpass filter value
727
$thisfile_mpeg_audio_lame['lowpass_frequency'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xA6, 1)) * 100;
728
729
// bytes $A7-$AE Replay Gain
730
// http://privatewww.essex.ac.uk/~djmrob/replaygain/rg_data_format.html
731
// bytes $A7-$AA : 32 bit floating point "Peak signal amplitude"
732
if ($thisfile_mpeg_audio_lame['short_version'] >= 'LAME3.94b') {
733
// LAME 3.94a16 and later - 9.23 fixed point
734
// ie 0x0059E2EE / (2^23) = 5890798 / 8388608 = 0.7022378444671630859375
735
$thisfile_mpeg_audio_lame_RGAD['peak_amplitude'] = (float) ((getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xA7, 4))) / 8388608);
736
} else {
737
// LAME 3.94a15 and earlier - 32-bit floating point
738
// Actually 3.94a16 will fall in here too and be WRONG, but is hard to detect 3.94a16 vs 3.94a15
739
$thisfile_mpeg_audio_lame_RGAD['peak_amplitude'] = getid3_lib::LittleEndian2Float(substr($headerstring, $LAMEtagOffsetContant + 0xA7, 4));
740
}
741
if ($thisfile_mpeg_audio_lame_RGAD['peak_amplitude'] == 0) {
742
unset($thisfile_mpeg_audio_lame_RGAD['peak_amplitude']);
743
} else {
744
$thisfile_mpeg_audio_lame_RGAD['peak_db'] = getid3_lib::RGADamplitude2dB($thisfile_mpeg_audio_lame_RGAD['peak_amplitude']);
745
}
746
747
$thisfile_mpeg_audio_lame_raw['RGAD_track'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xAB, 2));
748
$thisfile_mpeg_audio_lame_raw['RGAD_album'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xAD, 2));
749
750
751
if ($thisfile_mpeg_audio_lame_raw['RGAD_track'] != 0) {
752
753
$thisfile_mpeg_audio_lame_RGAD_track['raw']['name'] = ($thisfile_mpeg_audio_lame_raw['RGAD_track'] & 0xE000) >> 13;
754
$thisfile_mpeg_audio_lame_RGAD_track['raw']['originator'] = ($thisfile_mpeg_audio_lame_raw['RGAD_track'] & 0x1C00) >> 10;
755
$thisfile_mpeg_audio_lame_RGAD_track['raw']['sign_bit'] = ($thisfile_mpeg_audio_lame_raw['RGAD_track'] & 0x0200) >> 9;
756
$thisfile_mpeg_audio_lame_RGAD_track['raw']['gain_adjust'] = $thisfile_mpeg_audio_lame_raw['RGAD_track'] & 0x01FF;
757
$thisfile_mpeg_audio_lame_RGAD_track['name'] = getid3_lib::RGADnameLookup($thisfile_mpeg_audio_lame_RGAD_track['raw']['name']);
758
$thisfile_mpeg_audio_lame_RGAD_track['originator'] = getid3_lib::RGADoriginatorLookup($thisfile_mpeg_audio_lame_RGAD_track['raw']['originator']);
759
$thisfile_mpeg_audio_lame_RGAD_track['gain_db'] = getid3_lib::RGADadjustmentLookup($thisfile_mpeg_audio_lame_RGAD_track['raw']['gain_adjust'], $thisfile_mpeg_audio_lame_RGAD_track['raw']['sign_bit']);
760
761
if (!empty($thisfile_mpeg_audio_lame_RGAD['peak_amplitude'])) {
762
$info['replay_gain']['track']['peak'] = $thisfile_mpeg_audio_lame_RGAD['peak_amplitude'];
763
}
764
$info['replay_gain']['track']['originator'] = $thisfile_mpeg_audio_lame_RGAD_track['originator'];
765
$info['replay_gain']['track']['adjustment'] = $thisfile_mpeg_audio_lame_RGAD_track['gain_db'];
766
} else {
767
unset($thisfile_mpeg_audio_lame_RGAD['track']);
768
}
769
if ($thisfile_mpeg_audio_lame_raw['RGAD_album'] != 0) {
770
771
$thisfile_mpeg_audio_lame_RGAD_album['raw']['name'] = ($thisfile_mpeg_audio_lame_raw['RGAD_album'] & 0xE000) >> 13;
772
$thisfile_mpeg_audio_lame_RGAD_album['raw']['originator'] = ($thisfile_mpeg_audio_lame_raw['RGAD_album'] & 0x1C00) >> 10;
773
$thisfile_mpeg_audio_lame_RGAD_album['raw']['sign_bit'] = ($thisfile_mpeg_audio_lame_raw['RGAD_album'] & 0x0200) >> 9;
774
$thisfile_mpeg_audio_lame_RGAD_album['raw']['gain_adjust'] = $thisfile_mpeg_audio_lame_raw['RGAD_album'] & 0x01FF;
775
$thisfile_mpeg_audio_lame_RGAD_album['name'] = getid3_lib::RGADnameLookup($thisfile_mpeg_audio_lame_RGAD_album['raw']['name']);
776
$thisfile_mpeg_audio_lame_RGAD_album['originator'] = getid3_lib::RGADoriginatorLookup($thisfile_mpeg_audio_lame_RGAD_album['raw']['originator']);
777
$thisfile_mpeg_audio_lame_RGAD_album['gain_db'] = getid3_lib::RGADadjustmentLookup($thisfile_mpeg_audio_lame_RGAD_album['raw']['gain_adjust'], $thisfile_mpeg_audio_lame_RGAD_album['raw']['sign_bit']);
778
779
if (!empty($thisfile_mpeg_audio_lame_RGAD['peak_amplitude'])) {
780
$info['replay_gain']['album']['peak'] = $thisfile_mpeg_audio_lame_RGAD['peak_amplitude'];
781
}
782
$info['replay_gain']['album']['originator'] = $thisfile_mpeg_audio_lame_RGAD_album['originator'];
783
$info['replay_gain']['album']['adjustment'] = $thisfile_mpeg_audio_lame_RGAD_album['gain_db'];
784
} else {
785
unset($thisfile_mpeg_audio_lame_RGAD['album']);
786
}
787
if (empty($thisfile_mpeg_audio_lame_RGAD)) {
788
unset($thisfile_mpeg_audio_lame['RGAD']);
789
}
790
791
792
// byte $AF Encoding flags + ATH Type
793
$EncodingFlagsATHtype = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xAF, 1));
794
$thisfile_mpeg_audio_lame['encoding_flags']['nspsytune'] = (bool) ($EncodingFlagsATHtype & 0x10);
795
$thisfile_mpeg_audio_lame['encoding_flags']['nssafejoint'] = (bool) ($EncodingFlagsATHtype & 0x20);
796
$thisfile_mpeg_audio_lame['encoding_flags']['nogap_next'] = (bool) ($EncodingFlagsATHtype & 0x40);
797
$thisfile_mpeg_audio_lame['encoding_flags']['nogap_prev'] = (bool) ($EncodingFlagsATHtype & 0x80);
798
$thisfile_mpeg_audio_lame['ath_type'] = $EncodingFlagsATHtype & 0x0F;
799
800
// byte $B0 if ABR {specified bitrate} else {minimal bitrate}
801
$thisfile_mpeg_audio_lame['raw']['abrbitrate_minbitrate'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xB0, 1));
802
if ($thisfile_mpeg_audio_lame_raw['vbr_method'] == 2) { // Average BitRate (ABR)
803
$thisfile_mpeg_audio_lame['bitrate_abr'] = $thisfile_mpeg_audio_lame['raw']['abrbitrate_minbitrate'];
804
} elseif ($thisfile_mpeg_audio_lame_raw['vbr_method'] == 1) { // Constant BitRate (CBR)
805
// ignore
806
} elseif ($thisfile_mpeg_audio_lame['raw']['abrbitrate_minbitrate'] > 0) { // Variable BitRate (VBR) - minimum bitrate
807
$thisfile_mpeg_audio_lame['bitrate_min'] = $thisfile_mpeg_audio_lame['raw']['abrbitrate_minbitrate'];
808
}
809
810
// bytes $B1-$B3 Encoder delays
811
$EncoderDelays = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xB1, 3));
812
$thisfile_mpeg_audio_lame['encoder_delay'] = ($EncoderDelays & 0xFFF000) >> 12;
813
$thisfile_mpeg_audio_lame['end_padding'] = $EncoderDelays & 0x000FFF;
814
815
// byte $B4 Misc
816
$MiscByte = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xB4, 1));
817
$thisfile_mpeg_audio_lame_raw['noise_shaping'] = ($MiscByte & 0x03);
818
$thisfile_mpeg_audio_lame_raw['stereo_mode'] = ($MiscByte & 0x1C) >> 2;
819
$thisfile_mpeg_audio_lame_raw['not_optimal_quality'] = ($MiscByte & 0x20) >> 5;
820
$thisfile_mpeg_audio_lame_raw['source_sample_freq'] = ($MiscByte & 0xC0) >> 6;
821
$thisfile_mpeg_audio_lame['noise_shaping'] = $thisfile_mpeg_audio_lame_raw['noise_shaping'];
822
$thisfile_mpeg_audio_lame['stereo_mode'] = getid3_mp3::LAMEmiscStereoModeLookup($thisfile_mpeg_audio_lame_raw['stereo_mode']);
823
$thisfile_mpeg_audio_lame['not_optimal_quality'] = (bool) $thisfile_mpeg_audio_lame_raw['not_optimal_quality'];
824
$thisfile_mpeg_audio_lame['source_sample_freq'] = getid3_mp3::LAMEmiscSourceSampleFrequencyLookup($thisfile_mpeg_audio_lame_raw['source_sample_freq']);
825
826
// byte $B5 MP3 Gain
827
$thisfile_mpeg_audio_lame_raw['mp3_gain'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xB5, 1), false, true);
828
$thisfile_mpeg_audio_lame['mp3_gain_db'] = (getid3_lib::RGADamplitude2dB(2) / 4) * $thisfile_mpeg_audio_lame_raw['mp3_gain'];
829
$thisfile_mpeg_audio_lame['mp3_gain_factor'] = pow(2, ($thisfile_mpeg_audio_lame['mp3_gain_db'] / 6));
830
831
// bytes $B6-$B7 Preset and surround info
832
$PresetSurroundBytes = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xB6, 2));
833
// Reserved = ($PresetSurroundBytes & 0xC000);
834
$thisfile_mpeg_audio_lame_raw['surround_info'] = ($PresetSurroundBytes & 0x3800);
835
$thisfile_mpeg_audio_lame['surround_info'] = getid3_mp3::LAMEsurroundInfoLookup($thisfile_mpeg_audio_lame_raw['surround_info']);
836
$thisfile_mpeg_audio_lame['preset_used_id'] = ($PresetSurroundBytes & 0x07FF);
837
$thisfile_mpeg_audio_lame['preset_used'] = getid3_mp3::LAMEpresetUsedLookup($thisfile_mpeg_audio_lame);
838
if (!empty($thisfile_mpeg_audio_lame['preset_used_id']) && empty($thisfile_mpeg_audio_lame['preset_used'])) {
839
$info['warning'][] = 'Unknown LAME preset used ('.$thisfile_mpeg_audio_lame['preset_used_id'].') - please report to info@getid3.org';
840
}
841
if (($thisfile_mpeg_audio_lame['short_version'] == 'LAME3.90.') && !empty($thisfile_mpeg_audio_lame['preset_used_id'])) {
842
// this may change if 3.90.4 ever comes out
843
$thisfile_mpeg_audio_lame['short_version'] = 'LAME3.90.3';
844
}
845
846
// bytes $B8-$BB MusicLength
847
$thisfile_mpeg_audio_lame['audio_bytes'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xB8, 4));
848
$ExpectedNumberOfAudioBytes = (($thisfile_mpeg_audio_lame['audio_bytes'] > 0) ? $thisfile_mpeg_audio_lame['audio_bytes'] : $thisfile_mpeg_audio['VBR_bytes']);
849
850
// bytes $BC-$BD MusicCRC
851
$thisfile_mpeg_audio_lame['music_crc'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xBC, 2));
852
853
// bytes $BE-$BF CRC-16 of Info Tag
854
$thisfile_mpeg_audio_lame['lame_tag_crc'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xBE, 2));
855
856
857
// LAME CBR
858
if ($thisfile_mpeg_audio_lame_raw['vbr_method'] == 1) {
859
860
$thisfile_mpeg_audio['bitrate_mode'] = 'cbr';
861
$thisfile_mpeg_audio['bitrate'] = getid3_mp3::ClosestStandardMP3Bitrate($thisfile_mpeg_audio['bitrate']);
862
$info['audio']['bitrate'] = $thisfile_mpeg_audio['bitrate'];
863
//if (empty($thisfile_mpeg_audio['bitrate']) || (!empty($thisfile_mpeg_audio_lame['bitrate_min']) && ($thisfile_mpeg_audio_lame['bitrate_min'] != 255))) {
864
// $thisfile_mpeg_audio['bitrate'] = $thisfile_mpeg_audio_lame['bitrate_min'];
865
//}
866
867
}
868
869
}
870
}
871
872
} else {
873
874
// not Fraunhofer or Xing VBR methods, most likely CBR (but could be VBR with no header)
875
$thisfile_mpeg_audio['bitrate_mode'] = 'cbr';
876
if ($recursivesearch) {
877
$thisfile_mpeg_audio['bitrate_mode'] = 'vbr';
878
if ($this->RecursiveFrameScanning($offset, $nextframetestoffset, true)) {
879
$recursivesearch = false;
880
$thisfile_mpeg_audio['bitrate_mode'] = 'cbr';
881
}
882
if ($thisfile_mpeg_audio['bitrate_mode'] == 'vbr') {
883
$info['warning'][] = 'VBR file with no VBR header. Bitrate values calculated from actual frame bitrates.';
884
}
885
}
886
887
}
888
889
}
890
891
if (($ExpectedNumberOfAudioBytes > 0) && ($ExpectedNumberOfAudioBytes != ($info['avdataend'] - $info['avdataoffset']))) {
892
if ($ExpectedNumberOfAudioBytes > ($info['avdataend'] - $info['avdataoffset'])) {
893
if (isset($info['fileformat']) && ($info['fileformat'] == 'riff')) {
894
// ignore, audio data is broken into chunks so will always be data "missing"
895
} elseif (($ExpectedNumberOfAudioBytes - ($info['avdataend'] - $info['avdataoffset'])) == 1) {
896
$info['warning'][] = 'Last byte of data truncated (this is a known bug in Meracl ID3 Tag Writer before v1.3.5)';
897
} else {
898
$info['warning'][] = 'Probable truncated file: expecting '.$ExpectedNumberOfAudioBytes.' bytes of audio data, only found '.($info['avdataend'] - $info['avdataoffset']).' (short by '.($ExpectedNumberOfAudioBytes - ($info['avdataend'] - $info['avdataoffset'])).' bytes)';
899
}
900
} else {
901
if ((($info['avdataend'] - $info['avdataoffset']) - $ExpectedNumberOfAudioBytes) == 1) {
902
// $prenullbytefileoffset = ftell($this->getid3->fp);
903
// fseek($this->getid3->fp, $info['avdataend'], SEEK_SET);
904
// $PossibleNullByte = fread($this->getid3->fp, 1);
905
// fseek($this->getid3->fp, $prenullbytefileoffset, SEEK_SET);
906
// if ($PossibleNullByte === "\x00") {
907
$info['avdataend']--;
908
// $info['warning'][] = 'Extra null byte at end of MP3 data assumed to be RIFF padding and therefore ignored';
909
// } else {
910
// $info['warning'][] = 'Too much data in file: expecting '.$ExpectedNumberOfAudioBytes.' bytes of audio data, found '.($info['avdataend'] - $info['avdataoffset']).' ('.(($info['avdataend'] - $info['avdataoffset']) - $ExpectedNumberOfAudioBytes).' bytes too many)';
911
// }
912
} else {
913
$info['warning'][] = 'Too much data in file: expecting '.$ExpectedNumberOfAudioBytes.' bytes of audio data, found '.($info['avdataend'] - $info['avdataoffset']).' ('.(($info['avdataend'] - $info['avdataoffset']) - $ExpectedNumberOfAudioBytes).' bytes too many)';
914
}
915
}
916
}
917
918
if (($thisfile_mpeg_audio['bitrate'] == 'free') && empty($info['audio']['bitrate'])) {
919
if (($offset == $info['avdataoffset']) && empty($thisfile_mpeg_audio['VBR_frames'])) {
920
$framebytelength = $this->FreeFormatFrameLength($offset, true);
921
if ($framebytelength > 0) {
922
$thisfile_mpeg_audio['framelength'] = $framebytelength;
923
if ($thisfile_mpeg_audio['layer'] == '1') {
924
// BitRate = (((FrameLengthInBytes / 4) - Padding) * SampleRate) / 12
925
$info['audio']['bitrate'] = ((($framebytelength / 4) - intval($thisfile_mpeg_audio['padding'])) * $thisfile_mpeg_audio['sample_rate']) / 12;
926
} else {
927
// Bitrate = ((FrameLengthInBytes - Padding) * SampleRate) / 144
928
$info['audio']['bitrate'] = (($framebytelength - intval($thisfile_mpeg_audio['padding'])) * $thisfile_mpeg_audio['sample_rate']) / 144;
929
}
930
} else {
931
$info['error'][] = 'Error calculating frame length of free-format MP3 without Xing/LAME header';
932
}
933
}
934
}
935
936
if (isset($thisfile_mpeg_audio['VBR_frames']) ? $thisfile_mpeg_audio['VBR_frames'] : '') {
937
switch ($thisfile_mpeg_audio['bitrate_mode']) {
938
case 'vbr':
939
case 'abr':
940
$bytes_per_frame = 1152;
941
if (($thisfile_mpeg_audio['version'] == '1') && ($thisfile_mpeg_audio['layer'] == 1)) {
942
$bytes_per_frame = 384;
943
} elseif ((($thisfile_mpeg_audio['version'] == '2') || ($thisfile_mpeg_audio['version'] == '2.5')) && ($thisfile_mpeg_audio['layer'] == 3)) {
944
$bytes_per_frame = 576;
945
}
946
$thisfile_mpeg_audio['VBR_bitrate'] = (isset($thisfile_mpeg_audio['VBR_bytes']) ? (($thisfile_mpeg_audio['VBR_bytes'] / $thisfile_mpeg_audio['VBR_frames']) * 8) * ($info['audio']['sample_rate'] / $bytes_per_frame) : 0);
947
if ($thisfile_mpeg_audio['VBR_bitrate'] > 0) {
948
$info['audio']['bitrate'] = $thisfile_mpeg_audio['VBR_bitrate'];
949
$thisfile_mpeg_audio['bitrate'] = $thisfile_mpeg_audio['VBR_bitrate']; // to avoid confusion
950
}
951
break;
952
}
953
}
954
955
// End variable-bitrate headers
956
////////////////////////////////////////////////////////////////////////////////////
957
958
if ($recursivesearch) {
959
960
if (!$this->RecursiveFrameScanning($offset, $nextframetestoffset, $ScanAsCBR)) {
961
return false;
962
}
963
964
}
965
966
967
//if (false) {
968
// // experimental side info parsing section - not returning anything useful yet
969
//
970
// $SideInfoBitstream = getid3_lib::BigEndian2Bin($SideInfoData);
971
// $SideInfoOffset = 0;
972
//
973
// if ($thisfile_mpeg_audio['version'] == '1') {
974
// if ($thisfile_mpeg_audio['channelmode'] == 'mono') {
975
// // MPEG-1 (mono)
976
// $thisfile_mpeg_audio['side_info']['main_data_begin'] = substr($SideInfoBitstream, $SideInfoOffset, 9);
977
// $SideInfoOffset += 9;
978
// $SideInfoOffset += 5;
979
// } else {
980
// // MPEG-1 (stereo, joint-stereo, dual-channel)
981
// $thisfile_mpeg_audio['side_info']['main_data_begin'] = substr($SideInfoBitstream, $SideInfoOffset, 9);
982
// $SideInfoOffset += 9;
983
// $SideInfoOffset += 3;
984
// }
985
// } else { // 2 or 2.5
986
// if ($thisfile_mpeg_audio['channelmode'] == 'mono') {
987
// // MPEG-2, MPEG-2.5 (mono)
988
// $thisfile_mpeg_audio['side_info']['main_data_begin'] = substr($SideInfoBitstream, $SideInfoOffset, 8);
989
// $SideInfoOffset += 8;
990
// $SideInfoOffset += 1;
991
// } else {
992
// // MPEG-2, MPEG-2.5 (stereo, joint-stereo, dual-channel)
993
// $thisfile_mpeg_audio['side_info']['main_data_begin'] = substr($SideInfoBitstream, $SideInfoOffset, 8);
994
// $SideInfoOffset += 8;
995
// $SideInfoOffset += 2;
996
// }
997
// }
998
//
999
// if ($thisfile_mpeg_audio['version'] == '1') {
1000
// for ($channel = 0; $channel < $info['audio']['channels']; $channel++) {
1001
// for ($scfsi_band = 0; $scfsi_band < 4; $scfsi_band++) {
1002
// $thisfile_mpeg_audio['scfsi'][$channel][$scfsi_band] = substr($SideInfoBitstream, $SideInfoOffset, 1);
1003
// $SideInfoOffset += 2;
1004
// }
1005
// }
1006
// }
1007
// for ($granule = 0; $granule < (($thisfile_mpeg_audio['version'] == '1') ? 2 : 1); $granule++) {
1008
// for ($channel = 0; $channel < $info['audio']['channels']; $channel++) {
1009
// $thisfile_mpeg_audio['part2_3_length'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 12);
1010
// $SideInfoOffset += 12;
1011
// $thisfile_mpeg_audio['big_values'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 9);
1012
// $SideInfoOffset += 9;
1013
// $thisfile_mpeg_audio['global_gain'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 8);
1014
// $SideInfoOffset += 8;
1015
// if ($thisfile_mpeg_audio['version'] == '1') {
1016
// $thisfile_mpeg_audio['scalefac_compress'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 4);
1017
// $SideInfoOffset += 4;
1018
// } else {
1019
// $thisfile_mpeg_audio['scalefac_compress'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 9);
1020
// $SideInfoOffset += 9;
1021
// }
1022
// $thisfile_mpeg_audio['window_switching_flag'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 1);
1023
// $SideInfoOffset += 1;
1024
//
1025
// if ($thisfile_mpeg_audio['window_switching_flag'][$granule][$channel] == '1') {
1026
//
1027
// $thisfile_mpeg_audio['block_type'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 2);
1028
// $SideInfoOffset += 2;
1029
// $thisfile_mpeg_audio['mixed_block_flag'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 1);
1030
// $SideInfoOffset += 1;
1031
//
1032
// for ($region = 0; $region < 2; $region++) {
1033
// $thisfile_mpeg_audio['table_select'][$granule][$channel][$region] = substr($SideInfoBitstream, $SideInfoOffset, 5);
1034
// $SideInfoOffset += 5;
1035
// }
1036
// $thisfile_mpeg_audio['table_select'][$granule][$channel][2] = 0;
1037
//
1038
// for ($window = 0; $window < 3; $window++) {
1039
// $thisfile_mpeg_audio['subblock_gain'][$granule][$channel][$window] = substr($SideInfoBitstream, $SideInfoOffset, 3);
1040
// $SideInfoOffset += 3;
1041
// }
1042
//
1043
// } else {
1044
//
1045
// for ($region = 0; $region < 3; $region++) {
1046
// $thisfile_mpeg_audio['table_select'][$granule][$channel][$region] = substr($SideInfoBitstream, $SideInfoOffset, 5);
1047
// $SideInfoOffset += 5;
1048
// }
1049
//
1050
// $thisfile_mpeg_audio['region0_count'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 4);
1051
// $SideInfoOffset += 4;
1052
// $thisfile_mpeg_audio['region1_count'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 3);
1053
// $SideInfoOffset += 3;
1054
// $thisfile_mpeg_audio['block_type'][$granule][$channel] = 0;
1055
// }
1056
//
1057
// if ($thisfile_mpeg_audio['version'] == '1') {
1058
// $thisfile_mpeg_audio['preflag'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 1);
1059
// $SideInfoOffset += 1;
1060
// }
1061
// $thisfile_mpeg_audio['scalefac_scale'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 1);
1062
// $SideInfoOffset += 1;
1063
// $thisfile_mpeg_audio['count1table_select'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 1);
1064
// $SideInfoOffset += 1;
1065
// }
1066
// }
1067
//}
1068
1069
return true;
1070
}
1071
1072
function RecursiveFrameScanning(&$offset, &$nextframetestoffset, $ScanAsCBR) {
1073
$info = &$this->getid3->info;
1074
$firstframetestarray = array('error'=>'', 'warning'=>'', 'avdataend'=>$info['avdataend'], 'avdataoffset'=>$info['avdataoffset']);
1075
$this->decodeMPEGaudioHeader($offset, $firstframetestarray, false);
1076
1077
for ($i = 0; $i < GETID3_MP3_VALID_CHECK_FRAMES; $i++) {
1078
// check next GETID3_MP3_VALID_CHECK_FRAMES frames for validity, to make sure we haven't run across a false synch
1079
if (($nextframetestoffset + 4) >= $info['avdataend']) {
1080
// end of file
1081
return true;
1082
}
1083
1084
$nextframetestarray = array('error'=>'', 'warning'=>'', 'avdataend'=>$info['avdataend'], 'avdataoffset'=>$info['avdataoffset']);
1085
if ($this->decodeMPEGaudioHeader($nextframetestoffset, $nextframetestarray, false)) {
1086
if ($ScanAsCBR) {
1087
// force CBR mode, used for trying to pick out invalid audio streams with valid(?) VBR headers, or VBR streams with no VBR header
1088
if (!isset($nextframetestarray['mpeg']['audio']['bitrate']) || !isset($firstframetestarray['mpeg']['audio']['bitrate']) || ($nextframetestarray['mpeg']['audio']['bitrate'] != $firstframetestarray['mpeg']['audio']['bitrate'])) {
1089
return false;
1090
}
1091
}
1092
1093
1094
// next frame is OK, get ready to check the one after that
1095
if (isset($nextframetestarray['mpeg']['audio']['framelength']) && ($nextframetestarray['mpeg']['audio']['framelength'] > 0)) {
1096
$nextframetestoffset += $nextframetestarray['mpeg']['audio']['framelength'];
1097
} else {
1098
$info['error'][] = 'Frame at offset ('.$offset.') is has an invalid frame length.';
1099
return false;
1100
}
1101
1102
} elseif (!empty($firstframetestarray['mpeg']['audio']['framelength']) && (($nextframetestoffset + $firstframetestarray['mpeg']['audio']['framelength']) > $info['avdataend'])) {
1103
1104
// it's not the end of the file, but there's not enough data left for another frame, so assume it's garbage/padding and return OK
1105
return true;
1106
1107
} else {
1108
1109
// next frame is not valid, note the error and fail, so scanning can contiue for a valid frame sequence
1110
$info['warning'][] = 'Frame at offset ('.$offset.') is valid, but the next one at ('.$nextframetestoffset.') is not.';
1111
1112
return false;
1113
}
1114
}
1115
return true;
1116
}
1117
1118
function FreeFormatFrameLength($offset, $deepscan=false) {
1119
$info = &$this->getid3->info;
1120
1121
fseek($this->getid3->fp, $offset, SEEK_SET);
1122
$MPEGaudioData = fread($this->getid3->fp, 32768);
1123
1124
$SyncPattern1 = substr($MPEGaudioData, 0, 4);
1125
// may be different pattern due to padding
1126
$SyncPattern2 = $SyncPattern1{0}.$SyncPattern1{1}.chr(ord($SyncPattern1{2}) | 0x02).$SyncPattern1{3};
1127
if ($SyncPattern2 === $SyncPattern1) {
1128
$SyncPattern2 = $SyncPattern1{0}.$SyncPattern1{1}.chr(ord($SyncPattern1{2}) & 0xFD).$SyncPattern1{3};
1129
}
1130
1131
$framelength = false;
1132
$framelength1 = strpos($MPEGaudioData, $SyncPattern1, 4);
1133
$framelength2 = strpos($MPEGaudioData, $SyncPattern2, 4);
1134
if ($framelength1 > 4) {
1135
$framelength = $framelength1;
1136
}
1137
if (($framelength2 > 4) && ($framelength2 < $framelength1)) {
1138
$framelength = $framelength2;
1139
}
1140
if (!$framelength) {
1141
1142
// LAME 3.88 has a different value for modeextension on the first frame vs the rest
1143
$framelength1 = strpos($MPEGaudioData, substr($SyncPattern1, 0, 3), 4);
1144
$framelength2 = strpos($MPEGaudioData, substr($SyncPattern2, 0, 3), 4);
1145
1146
if ($framelength1 > 4) {
1147
$framelength = $framelength1;
1148
}
1149
if (($framelength2 > 4) && ($framelength2 < $framelength1)) {
1150
$framelength = $framelength2;
1151
}
1152
if (!$framelength) {
1153
$info['error'][] = 'Cannot find next free-format synch pattern ('.getid3_lib::PrintHexBytes($SyncPattern1).' or '.getid3_lib::PrintHexBytes($SyncPattern2).') after offset '.$offset;
1154
return false;
1155
} else {
1156
$info['warning'][] = 'ModeExtension varies between first frame and other frames (known free-format issue in LAME 3.88)';
1157
$info['audio']['codec'] = 'LAME';
1158
$info['audio']['encoder'] = 'LAME3.88';
1159
$SyncPattern1 = substr($SyncPattern1, 0, 3);
1160
$SyncPattern2 = substr($SyncPattern2, 0, 3);
1161
}
1162
}
1163
1164
if ($deepscan) {
1165
1166
$ActualFrameLengthValues = array();
1167
$nextoffset = $offset + $framelength;
1168
while ($nextoffset < ($info['avdataend'] - 6)) {
1169
fseek($this->getid3->fp, $nextoffset - 1, SEEK_SET);
1170
$NextSyncPattern = fread($this->getid3->fp, 6);
1171
if ((substr($NextSyncPattern, 1, strlen($SyncPattern1)) == $SyncPattern1) || (substr($NextSyncPattern, 1, strlen($SyncPattern2)) == $SyncPattern2)) {
1172
// good - found where expected
1173
$ActualFrameLengthValues[] = $framelength;
1174
} elseif ((substr($NextSyncPattern, 0, strlen($SyncPattern1)) == $SyncPattern1) || (substr($NextSyncPattern, 0, strlen($SyncPattern2)) == $SyncPattern2)) {
1175
// ok - found one byte earlier than expected (last frame wasn't padded, first frame was)
1176
$ActualFrameLengthValues[] = ($framelength - 1);
1177
$nextoffset--;
1178
} elseif ((substr($NextSyncPattern, 2, strlen($SyncPattern1)) == $SyncPattern1) || (substr($NextSyncPattern, 2, strlen($SyncPattern2)) == $SyncPattern2)) {
1179
// ok - found one byte later than expected (last frame was padded, first frame wasn't)
1180
$ActualFrameLengthValues[] = ($framelength + 1);
1181
$nextoffset++;
1182
} else {
1183
$info['error'][] = 'Did not find expected free-format sync pattern at offset '.$nextoffset;
1184
return false;
1185
}
1186
$nextoffset += $framelength;
1187
}
1188
if (count($ActualFrameLengthValues) > 0) {
1189
$framelength = intval(round(array_sum($ActualFrameLengthValues) / count($ActualFrameLengthValues)));
1190
}
1191
}
1192
return $framelength;
1193
}
1194
1195
function getOnlyMPEGaudioInfoBruteForce() {
1196
$MPEGaudioHeaderDecodeCache = array();
1197
$MPEGaudioHeaderValidCache = array();
1198
$MPEGaudioHeaderLengthCache = array();
1199
$MPEGaudioVersionLookup = getid3_mp3::MPEGaudioVersionArray();
1200
$MPEGaudioLayerLookup = getid3_mp3::MPEGaudioLayerArray();
1201
$MPEGaudioBitrateLookup = getid3_mp3::MPEGaudioBitrateArray();
1202
$MPEGaudioFrequencyLookup = getid3_mp3::MPEGaudioFrequencyArray();
1203
$MPEGaudioChannelModeLookup = getid3_mp3::MPEGaudioChannelModeArray();
1204
$MPEGaudioModeExtensionLookup = getid3_mp3::MPEGaudioModeExtensionArray();
1205
$MPEGaudioEmphasisLookup = getid3_mp3::MPEGaudioEmphasisArray();
1206
$LongMPEGversionLookup = array();
1207
$LongMPEGlayerLookup = array();
1208
$LongMPEGbitrateLookup = array();
1209
$LongMPEGpaddingLookup = array();
1210
$LongMPEGfrequencyLookup = array();
1211
$Distribution['bitrate'] = array();
1212
$Distribution['frequency'] = array();
1213
$Distribution['layer'] = array();
1214
$Distribution['version'] = array();
1215
$Distribution['padding'] = array();
1216
1217
$info = &$this->getid3->info;
1218
fseek($this->getid3->fp, $info['avdataoffset'], SEEK_SET);
1219
1220
$max_frames_scan = 5000;
1221
$frames_scanned = 0;
1222
1223
$previousvalidframe = $info['avdataoffset'];
1224
while (ftell($this->getid3->fp) < $info['avdataend']) {
1225
set_time_limit(30);
1226
$head4 = fread($this->getid3->fp, 4);
1227
if (strlen($head4) < 4) {
1228
break;
1229
}
1230
if ($head4{0} != "\xFF") {
1231
for ($i = 1; $i < 4; $i++) {
1232
if ($head4{$i} == "\xFF") {
1233
fseek($this->getid3->fp, $i - 4, SEEK_CUR);
1234
continue 2;
1235
}
1236
}
1237
continue;
1238
}
1239
if (!isset($MPEGaudioHeaderDecodeCache[$head4])) {
1240
$MPEGaudioHeaderDecodeCache[$head4] = getid3_mp3::MPEGaudioHeaderDecode($head4);
1241
}
1242
if (!isset($MPEGaudioHeaderValidCache[$head4])) {
1243
$MPEGaudioHeaderValidCache[$head4] = getid3_mp3::MPEGaudioHeaderValid($MPEGaudioHeaderDecodeCache[$head4], false, false);
1244
}
1245
if ($MPEGaudioHeaderValidCache[$head4]) {
1246
1247
if (!isset($MPEGaudioHeaderLengthCache[$head4])) {
1248
$LongMPEGversionLookup[$head4] = $MPEGaudioVersionLookup[$MPEGaudioHeaderDecodeCache[$head4]['version']];
1249
$LongMPEGlayerLookup[$head4] = $MPEGaudioLayerLookup[$MPEGaudioHeaderDecodeCache[$head4]['layer']];
1250
$LongMPEGbitrateLookup[$head4] = $MPEGaudioBitrateLookup[$LongMPEGversionLookup[$head4]][$LongMPEGlayerLookup[$head4]][$MPEGaudioHeaderDecodeCache[$head4]['bitrate']];
1251
$LongMPEGpaddingLookup[$head4] = (bool) $MPEGaudioHeaderDecodeCache[$head4]['padding'];
1252
$LongMPEGfrequencyLookup[$head4] = $MPEGaudioFrequencyLookup[$LongMPEGversionLookup[$head4]][$MPEGaudioHeaderDecodeCache[$head4]['sample_rate']];
1253
$MPEGaudioHeaderLengthCache[$head4] = getid3_mp3::MPEGaudioFrameLength(
1254
$LongMPEGbitrateLookup[$head4],
1255
$LongMPEGversionLookup[$head4],
1256
$LongMPEGlayerLookup[$head4],
1257
$LongMPEGpaddingLookup[$head4],
1258
$LongMPEGfrequencyLookup[$head4]);
1259
}
1260
if ($MPEGaudioHeaderLengthCache[$head4] > 4) {
1261
$WhereWeWere = ftell($this->getid3->fp);
1262
fseek($this->getid3->fp, $MPEGaudioHeaderLengthCache[$head4] - 4, SEEK_CUR);
1263
$next4 = fread($this->getid3->fp, 4);
1264
if ($next4{0} == "\xFF") {
1265
if (!isset($MPEGaudioHeaderDecodeCache[$next4])) {
1266
$MPEGaudioHeaderDecodeCache[$next4] = getid3_mp3::MPEGaudioHeaderDecode($next4);
1267
}
1268
if (!isset($MPEGaudioHeaderValidCache[$next4])) {
1269
$MPEGaudioHeaderValidCache[$next4] = getid3_mp3::MPEGaudioHeaderValid($MPEGaudioHeaderDecodeCache[$next4], false, false);
1270
}
1271
if ($MPEGaudioHeaderValidCache[$next4]) {
1272
fseek($this->getid3->fp, -4, SEEK_CUR);
1273
1274
getid3_lib::safe_inc($Distribution['bitrate'][$LongMPEGbitrateLookup[$head4]]);
1275
getid3_lib::safe_inc($Distribution['layer'][$LongMPEGlayerLookup[$head4]]);
1276
getid3_lib::safe_inc($Distribution['version'][$LongMPEGversionLookup[$head4]]);
1277
getid3_lib::safe_inc($Distribution['padding'][intval($LongMPEGpaddingLookup[$head4])]);
1278
getid3_lib::safe_inc($Distribution['frequency'][$LongMPEGfrequencyLookup[$head4]]);
1279
if ($max_frames_scan && (++$frames_scanned >= $max_frames_scan)) {
1280
$pct_data_scanned = (ftell($this->getid3->fp) - $info['avdataoffset']) / ($info['avdataend'] - $info['avdataoffset']);
1281
$info['warning'][] = 'too many MPEG audio frames to scan, only scanned first '.$max_frames_scan.' frames ('.number_format($pct_data_scanned * 100, 1).'% of file) and extrapolated distribution, playtime and bitrate may be incorrect.';
1282
foreach ($Distribution as $key1 => $value1) {
1283
foreach ($value1 as $key2 => $value2) {
1284
$Distribution[$key1][$key2] = round($value2 / $pct_data_scanned);
1285
}
1286
}
1287
break;
1288
}
1289
continue;
1290
}
1291
}
1292
unset($next4);
1293
fseek($this->getid3->fp, $WhereWeWere - 3, SEEK_SET);
1294
}
1295
1296
}
1297
}
1298
foreach ($Distribution as $key => $value) {
1299
ksort($Distribution[$key], SORT_NUMERIC);
1300
}
1301
ksort($Distribution['version'], SORT_STRING);
1302
$info['mpeg']['audio']['bitrate_distribution'] = $Distribution['bitrate'];
1303
$info['mpeg']['audio']['frequency_distribution'] = $Distribution['frequency'];
1304
$info['mpeg']['audio']['layer_distribution'] = $Distribution['layer'];
1305
$info['mpeg']['audio']['version_distribution'] = $Distribution['version'];
1306
$info['mpeg']['audio']['padding_distribution'] = $Distribution['padding'];
1307
if (count($Distribution['version']) > 1) {
1308
$info['error'][] = 'Corrupt file - more than one MPEG version detected';
1309
}
1310
if (count($Distribution['layer']) > 1) {
1311
$info['error'][] = 'Corrupt file - more than one MPEG layer detected';
1312
}
1313
if (count($Distribution['frequency']) > 1) {
1314
$info['error'][] = 'Corrupt file - more than one MPEG sample rate detected';
1315
}
1316
1317
1318
$bittotal = 0;
1319
foreach ($Distribution['bitrate'] as $bitratevalue => $bitratecount) {
1320
if ($bitratevalue != 'free') {
1321
$bittotal += ($bitratevalue * $bitratecount);
1322
}
1323
}
1324
$info['mpeg']['audio']['frame_count'] = array_sum($Distribution['bitrate']);
1325
if ($info['mpeg']['audio']['frame_count'] == 0) {
1326
$info['error'][] = 'no MPEG audio frames found';
1327
return false;
1328
}
1329
$info['mpeg']['audio']['bitrate'] = ($bittotal / $info['mpeg']['audio']['frame_count']);
1330
$info['mpeg']['audio']['bitrate_mode'] = ((count($Distribution['bitrate']) > 0) ? 'vbr' : 'cbr');
1331
$info['mpeg']['audio']['sample_rate'] = getid3_lib::array_max($Distribution['frequency'], true);
1332
1333
$info['audio']['bitrate'] = $info['mpeg']['audio']['bitrate'];
1334
$info['audio']['bitrate_mode'] = $info['mpeg']['audio']['bitrate_mode'];
1335
$info['audio']['sample_rate'] = $info['mpeg']['audio']['sample_rate'];
1336
$info['audio']['dataformat'] = 'mp'.getid3_lib::array_max($Distribution['layer'], true);
1337
$info['fileformat'] = $info['audio']['dataformat'];
1338
1339
return true;
1340
}
1341
1342
1343
function getOnlyMPEGaudioInfo($avdataoffset, $BitrateHistogram=false) {
1344
// looks for synch, decodes MPEG audio header
1345
1346
$info = &$this->getid3->info;
1347
1348
static $MPEGaudioVersionLookup;
1349
static $MPEGaudioLayerLookup;
1350
static $MPEGaudioBitrateLookup;
1351
if (empty($MPEGaudioVersionLookup)) {
1352
$MPEGaudioVersionLookup = getid3_mp3::MPEGaudioVersionArray();
1353
$MPEGaudioLayerLookup = getid3_mp3::MPEGaudioLayerArray();
1354
$MPEGaudioBitrateLookup = getid3_mp3::MPEGaudioBitrateArray();
1355
1356
}
1357
1358
fseek($this->getid3->fp, $avdataoffset, SEEK_SET);
1359
$sync_seek_buffer_size = min(128 * 1024, $info['avdataend'] - $avdataoffset);
1360
if ($sync_seek_buffer_size <= 0) {
1361
$info['error'][] = 'Invalid $sync_seek_buffer_size at offset '.$avdataoffset;
1362
return false;
1363
}
1364
$header = fread($this->getid3->fp, $sync_seek_buffer_size);
1365
$sync_seek_buffer_size = strlen($header);
1366
$SynchSeekOffset = 0;
1367
while ($SynchSeekOffset < $sync_seek_buffer_size) {
1368
if ((($avdataoffset + $SynchSeekOffset) < $info['avdataend']) && !feof($this->getid3->fp)) {
1369
1370
if ($SynchSeekOffset > $sync_seek_buffer_size) {
1371
// if a synch's not found within the first 128k bytes, then give up
1372
$info['error'][] = 'Could not find valid MPEG audio synch within the first '.round($sync_seek_buffer_size / 1024).'kB';
1373
if (isset($info['audio']['bitrate'])) {
1374
unset($info['audio']['bitrate']);
1375
}
1376
if (isset($info['mpeg']['audio'])) {
1377
unset($info['mpeg']['audio']);
1378
}
1379
if (empty($info['mpeg'])) {
1380
unset($info['mpeg']);
1381
}
1382
return false;
1383
1384
} elseif (feof($this->getid3->fp)) {
1385
1386
$info['error'][] = 'Could not find valid MPEG audio synch before end of file';
1387
if (isset($info['audio']['bitrate'])) {
1388
unset($info['audio']['bitrate']);
1389
}
1390
if (isset($info['mpeg']['audio'])) {
1391
unset($info['mpeg']['audio']);
1392
}
1393
if (isset($info['mpeg']) && (!is_array($info['mpeg']) || (count($info['mpeg']) == 0))) {
1394
unset($info['mpeg']);
1395
}
1396
return false;
1397
}
1398
}
1399
1400
if (($SynchSeekOffset + 1) >= strlen($header)) {
1401
$info['error'][] = 'Could not find valid MPEG synch before end of file';
1402
return false;
1403
}
1404
1405
if (($header{$SynchSeekOffset} == "\xFF") && ($header{($SynchSeekOffset + 1)} > "\xE0")) { // synch detected
1406
if (!isset($FirstFrameThisfileInfo) && !isset($info['mpeg']['audio'])) {
1407
$FirstFrameThisfileInfo = $info;
1408
$FirstFrameAVDataOffset = $avdataoffset + $SynchSeekOffset;
1409
if (!$this->decodeMPEGaudioHeader($FirstFrameAVDataOffset, $FirstFrameThisfileInfo, false)) {
1410
// if this is the first valid MPEG-audio frame, save it in case it's a VBR header frame and there's
1411
// garbage between this frame and a valid sequence of MPEG-audio frames, to be restored below
1412
unset($FirstFrameThisfileInfo);
1413
}
1414
}
1415
1416
$dummy = $info; // only overwrite real data if valid header found
1417
if ($this->decodeMPEGaudioHeader($avdataoffset + $SynchSeekOffset, $dummy, true)) {
1418
$info = $dummy;
1419
$info['avdataoffset'] = $avdataoffset + $SynchSeekOffset;
1420
switch (isset($info['fileformat']) ? $info['fileformat'] : '') {
1421
case '':
1422
case 'id3':
1423
case 'ape':
1424
case 'mp3':
1425
$info['fileformat'] = 'mp3';
1426
$info['audio']['dataformat'] = 'mp3';
1427
break;
1428
}
1429
if (isset($FirstFrameThisfileInfo['mpeg']['audio']['bitrate_mode']) && ($FirstFrameThisfileInfo['mpeg']['audio']['bitrate_mode'] == 'vbr')) {
1430
if (!(abs($info['audio']['bitrate'] - $FirstFrameThisfileInfo['audio']['bitrate']) <= 1)) {
1431
// If there is garbage data between a valid VBR header frame and a sequence
1432
// of valid MPEG-audio frames the VBR data is no longer discarded.
1433
$info = $FirstFrameThisfileInfo;
1434
$info['avdataoffset'] = $FirstFrameAVDataOffset;
1435
$info['fileformat'] = 'mp3';
1436
$info['audio']['dataformat'] = 'mp3';
1437
$dummy = $info;
1438
unset($dummy['mpeg']['audio']);
1439
$GarbageOffsetStart = $FirstFrameAVDataOffset + $FirstFrameThisfileInfo['mpeg']['audio']['framelength'];
1440
$GarbageOffsetEnd = $avdataoffset + $SynchSeekOffset;
1441
if ($this->decodeMPEGaudioHeader($GarbageOffsetEnd, $dummy, true, true)) {
1442
$info = $dummy;
1443
$info['avdataoffset'] = $GarbageOffsetEnd;
1444
$info['warning'][] = 'apparently-valid VBR header not used because could not find '.GETID3_MP3_VALID_CHECK_FRAMES.' consecutive MPEG-audio frames immediately after VBR header (garbage data for '.($GarbageOffsetEnd - $GarbageOffsetStart).' bytes between '.$GarbageOffsetStart.' and '.$GarbageOffsetEnd.'), but did find valid CBR stream starting at '.$GarbageOffsetEnd;
1445
} else {
1446
$info['warning'][] = 'using data from VBR header even though could not find '.GETID3_MP3_VALID_CHECK_FRAMES.' consecutive MPEG-audio frames immediately after VBR header (garbage data for '.($GarbageOffsetEnd - $GarbageOffsetStart).' bytes between '.$GarbageOffsetStart.' and '.$GarbageOffsetEnd.')';
1447
}
1448
}
1449
}
1450
if (isset($info['mpeg']['audio']['bitrate_mode']) && ($info['mpeg']['audio']['bitrate_mode'] == 'vbr') && !isset($info['mpeg']['audio']['VBR_method'])) {
1451
// VBR file with no VBR header
1452
$BitrateHistogram = true;
1453
}
1454
1455
if ($BitrateHistogram) {
1456
1457
$info['mpeg']['audio']['stereo_distribution'] = array('stereo'=>0, 'joint stereo'=>0, 'dual channel'=>0, 'mono'=>0);
1458
$info['mpeg']['audio']['version_distribution'] = array('1'=>0, '2'=>0, '2.5'=>0);
1459
1460
if ($info['mpeg']['audio']['version'] == '1') {
1461
if ($info['mpeg']['audio']['layer'] == 3) {
1462
$info['mpeg']['audio']['bitrate_distribution'] = array('free'=>0, 32000=>0, 40000=>0, 48000=>0, 56000=>0, 64000=>0, 80000=>0, 96000=>0, 112000=>0, 128000=>0, 160000=>0, 192000=>0, 224000=>0, 256000=>0, 320000=>0);
1463
} elseif ($info['mpeg']['audio']['layer'] == 2) {
1464
$info['mpeg']['audio']['bitrate_distribution'] = array('free'=>0, 32000=>0, 48000=>0, 56000=>0, 64000=>0, 80000=>0, 96000=>0, 112000=>0, 128000=>0, 160000=>0, 192000=>0, 224000=>0, 256000=>0, 320000=>0, 384000=>0);
1465
} elseif ($info['mpeg']['audio']['layer'] == 1) {
1466
$info['mpeg']['audio']['bitrate_distribution'] = array('free'=>0, 32000=>0, 64000=>0, 96000=>0, 128000=>0, 160000=>0, 192000=>0, 224000=>0, 256000=>0, 288000=>0, 320000=>0, 352000=>0, 384000=>0, 416000=>0, 448000=>0);
1467
}
1468
} elseif ($info['mpeg']['audio']['layer'] == 1) {
1469
$info['mpeg']['audio']['bitrate_distribution'] = array('free'=>0, 32000=>0, 48000=>0, 56000=>0, 64000=>0, 80000=>0, 96000=>0, 112000=>0, 128000=>0, 144000=>0, 160000=>0, 176000=>0, 192000=>0, 224000=>0, 256000=>0);
1470
} else {
1471
$info['mpeg']['audio']['bitrate_distribution'] = array('free'=>0, 8000=>0, 16000=>0, 24000=>0, 32000=>0, 40000=>0, 48000=>0, 56000=>0, 64000=>0, 80000=>0, 96000=>0, 112000=>0, 128000=>0, 144000=>0, 160000=>0);
1472
}
1473
1474
$dummy = array('error'=>$info['error'], 'warning'=>$info['warning'], 'avdataend'=>$info['avdataend'], 'avdataoffset'=>$info['avdataoffset']);
1475
$synchstartoffset = $info['avdataoffset'];
1476
fseek($this->getid3->fp, $info['avdataoffset'], SEEK_SET);
1477
1478
// you can play with these numbers:
1479
$max_frames_scan = 50000;
1480
$max_scan_segments = 10;
1481
1482
// don't play with these numbers:
1483
$FastMode = false;
1484
$SynchErrorsFound = 0;
1485
$frames_scanned = 0;
1486
$this_scan_segment = 0;
1487
$frames_scan_per_segment = ceil($max_frames_scan / $max_scan_segments);
1488
$pct_data_scanned = 0;
1489
for ($current_segment = 0; $current_segment < $max_scan_segments; $current_segment++) {
1490
$frames_scanned_this_segment = 0;
1491
if (ftell($this->getid3->fp) >= $info['avdataend']) {
1492
break;
1493
}
1494
$scan_start_offset[$current_segment] = max(ftell($this->getid3->fp), $info['avdataoffset'] + round($current_segment * (($info['avdataend'] - $info['avdataoffset']) / $max_scan_segments)));
1495
if ($current_segment > 0) {
1496
fseek($this->getid3->fp, $scan_start_offset[$current_segment], SEEK_SET);
1497
$buffer_4k = fread($this->getid3->fp, 4096);
1498
for ($j = 0; $j < (strlen($buffer_4k) - 4); $j++) {
1499
if (($buffer_4k{$j} == "\xFF") && ($buffer_4k{($j + 1)} > "\xE0")) { // synch detected
1500
if ($this->decodeMPEGaudioHeader($scan_start_offset[$current_segment] + $j, $dummy, false, false, $FastMode)) {
1501
$calculated_next_offset = $scan_start_offset[$current_segment] + $j + $dummy['mpeg']['audio']['framelength'];
1502
if ($this->decodeMPEGaudioHeader($calculated_next_offset, $dummy, false, false, $FastMode)) {
1503
$scan_start_offset[$current_segment] += $j;
1504
break;
1505
}
1506
}
1507
}
1508
}
1509
}
1510
$synchstartoffset = $scan_start_offset[$current_segment];
1511
while ($this->decodeMPEGaudioHeader($synchstartoffset, $dummy, false, false, $FastMode)) {
1512
$FastMode = true;
1513
$thisframebitrate = $MPEGaudioBitrateLookup[$MPEGaudioVersionLookup[$dummy['mpeg']['audio']['raw']['version']]][$MPEGaudioLayerLookup[$dummy['mpeg']['audio']['raw']['layer']]][$dummy['mpeg']['audio']['raw']['bitrate']];
1514
1515
if (empty($dummy['mpeg']['audio']['framelength'])) {
1516
$SynchErrorsFound++;
1517
$synchstartoffset++;
1518
} else {
1519
getid3_lib::safe_inc($info['mpeg']['audio']['bitrate_distribution'][$thisframebitrate]);
1520
getid3_lib::safe_inc($info['mpeg']['audio']['stereo_distribution'][$dummy['mpeg']['audio']['channelmode']]);
1521
getid3_lib::safe_inc($info['mpeg']['audio']['version_distribution'][$dummy['mpeg']['audio']['version']]);
1522
$synchstartoffset += $dummy['mpeg']['audio']['framelength'];
1523
}
1524
$frames_scanned++;
1525
if ($frames_scan_per_segment && (++$frames_scanned_this_segment >= $frames_scan_per_segment)) {
1526
$this_pct_scanned = (ftell($this->getid3->fp) - $scan_start_offset[$current_segment]) / ($info['avdataend'] - $info['avdataoffset']);
1527
if (($current_segment == 0) && (($this_pct_scanned * $max_scan_segments) >= 1)) {
1528
// file likely contains < $max_frames_scan, just scan as one segment
1529
$max_scan_segments = 1;
1530
$frames_scan_per_segment = $max_frames_scan;
1531
} else {
1532
$pct_data_scanned += $this_pct_scanned;
1533
break;
1534
}
1535
}
1536
}
1537
}
1538
if ($pct_data_scanned > 0) {
1539
$info['warning'][] = 'too many MPEG audio frames to scan, only scanned '.$frames_scanned.' frames in '.$max_scan_segments.' segments ('.number_format($pct_data_scanned * 100, 1).'% of file) and extrapolated distribution, playtime and bitrate may be incorrect.';
1540
foreach ($info['mpeg']['audio'] as $key1 => $value1) {
1541
if (!preg_match('#_distribution$#i', $key1)) {
1542
continue;
1543
}
1544
foreach ($value1 as $key2 => $value2) {
1545
$info['mpeg']['audio'][$key1][$key2] = round($value2 / $pct_data_scanned);
1546
}
1547
}
1548
}
1549
1550
if ($SynchErrorsFound > 0) {
1551
$info['warning'][] = 'Found '.$SynchErrorsFound.' synch errors in histogram analysis';
1552
//return false;
1553
}
1554
1555
$bittotal = 0;
1556
$framecounter = 0;
1557
foreach ($info['mpeg']['audio']['bitrate_distribution'] as $bitratevalue => $bitratecount) {
1558
$framecounter += $bitratecount;
1559
if ($bitratevalue != 'free') {
1560
$bittotal += ($bitratevalue * $bitratecount);
1561
}
1562
}
1563
if ($framecounter == 0) {
1564
$info['error'][] = 'Corrupt MP3 file: framecounter == zero';
1565
return false;
1566
}
1567
$info['mpeg']['audio']['frame_count'] = getid3_lib::CastAsInt($framecounter);
1568
$info['mpeg']['audio']['bitrate'] = ($bittotal / $framecounter);
1569
1570
$info['audio']['bitrate'] = $info['mpeg']['audio']['bitrate'];
1571
1572
1573
// Definitively set VBR vs CBR, even if the Xing/LAME/VBRI header says differently
1574
$distinct_bitrates = 0;
1575
foreach ($info['mpeg']['audio']['bitrate_distribution'] as $bitrate_value => $bitrate_count) {
1576
if ($bitrate_count > 0) {
1577
$distinct_bitrates++;
1578
}
1579
}
1580
if ($distinct_bitrates > 1) {
1581
$info['mpeg']['audio']['bitrate_mode'] = 'vbr';
1582
} else {
1583
$info['mpeg']['audio']['bitrate_mode'] = 'cbr';
1584
}
1585
$info['audio']['bitrate_mode'] = $info['mpeg']['audio']['bitrate_mode'];
1586
1587
}
1588
1589
break; // exit while()
1590
}
1591
}
1592
1593
$SynchSeekOffset++;
1594
if (($avdataoffset + $SynchSeekOffset) >= $info['avdataend']) {
1595
// end of file/data
1596
1597
if (empty($info['mpeg']['audio'])) {
1598
1599
$info['error'][] = 'could not find valid MPEG synch before end of file';
1600
if (isset($info['audio']['bitrate'])) {
1601
unset($info['audio']['bitrate']);
1602
}
1603
if (isset($info['mpeg']['audio'])) {
1604
unset($info['mpeg']['audio']);
1605
}
1606
if (isset($info['mpeg']) && (!is_array($info['mpeg']) || empty($info['mpeg']))) {
1607
unset($info['mpeg']);
1608
}
1609
return false;
1610
1611
}
1612
break;
1613
}
1614
1615
}
1616
$info['audio']['channels'] = $info['mpeg']['audio']['channels'];
1617
$info['audio']['channelmode'] = $info['mpeg']['audio']['channelmode'];
1618
$info['audio']['sample_rate'] = $info['mpeg']['audio']['sample_rate'];
1619
return true;
1620
}
1621
1622
1623
static function MPEGaudioVersionArray() {
1624
static $MPEGaudioVersion = array('2.5', false, '2', '1');
1625
return $MPEGaudioVersion;
1626
}
1627
1628
static function MPEGaudioLayerArray() {
1629
static $MPEGaudioLayer = array(false, 3, 2, 1);
1630
return $MPEGaudioLayer;
1631
}
1632
1633
static function MPEGaudioBitrateArray() {
1634
static $MPEGaudioBitrate;
1635
if (empty($MPEGaudioBitrate)) {
1636
$MPEGaudioBitrate = array (
1637
'1' => array (1 => array('free', 32000, 64000, 96000, 128000, 160000, 192000, 224000, 256000, 288000, 320000, 352000, 384000, 416000, 448000),
1638
2 => array('free', 32000, 48000, 56000, 64000, 80000, 96000, 112000, 128000, 160000, 192000, 224000, 256000, 320000, 384000),
1639
3 => array('free', 32000, 40000, 48000, 56000, 64000, 80000, 96000, 112000, 128000, 160000, 192000, 224000, 256000, 320000)
1640
),
1641
1642
'2' => array (1 => array('free', 32000, 48000, 56000, 64000, 80000, 96000, 112000, 128000, 144000, 160000, 176000, 192000, 224000, 256000),
1643
2 => array('free', 8000, 16000, 24000, 32000, 40000, 48000, 56000, 64000, 80000, 96000, 112000, 128000, 144000, 160000),
1644
)
1645
);
1646
$MPEGaudioBitrate['2'][3] = $MPEGaudioBitrate['2'][2];
1647
$MPEGaudioBitrate['2.5'] = $MPEGaudioBitrate['2'];
1648
}
1649
return $MPEGaudioBitrate;
1650
}
1651
1652
static function MPEGaudioFrequencyArray() {
1653
static $MPEGaudioFrequency;
1654
if (empty($MPEGaudioFrequency)) {
1655
$MPEGaudioFrequency = array (
1656
'1' => array(44100, 48000, 32000),
1657
'2' => array(22050, 24000, 16000),
1658
'2.5' => array(11025, 12000, 8000)
1659
);
1660
}
1661
return $MPEGaudioFrequency;
1662
}
1663
1664
static function MPEGaudioChannelModeArray() {
1665
static $MPEGaudioChannelMode = array('stereo', 'joint stereo', 'dual channel', 'mono');
1666
return $MPEGaudioChannelMode;
1667
}
1668
1669
static function MPEGaudioModeExtensionArray() {
1670
static $MPEGaudioModeExtension;
1671
if (empty($MPEGaudioModeExtension)) {
1672
$MPEGaudioModeExtension = array (
1673
1 => array('4-31', '8-31', '12-31', '16-31'),
1674
2 => array('4-31', '8-31', '12-31', '16-31'),
1675
3 => array('', 'IS', 'MS', 'IS+MS')
1676
);
1677
}
1678
return $MPEGaudioModeExtension;
1679
}
1680
1681
static function MPEGaudioEmphasisArray() {
1682
static $MPEGaudioEmphasis = array('none', '50/15ms', false, 'CCIT J.17');
1683
return $MPEGaudioEmphasis;
1684
}
1685
1686
static function MPEGaudioHeaderBytesValid($head4, $allowBitrate15=false) {
1687
return getid3_mp3::MPEGaudioHeaderValid(getid3_mp3::MPEGaudioHeaderDecode($head4), false, $allowBitrate15);
1688
}
1689
1690
static function MPEGaudioHeaderValid($rawarray, $echoerrors=false, $allowBitrate15=false) {
1691
if (($rawarray['synch'] & 0x0FFE) != 0x0FFE) {
1692
return false;
1693
}
1694
1695
static $MPEGaudioVersionLookup;
1696
static $MPEGaudioLayerLookup;
1697
static $MPEGaudioBitrateLookup;
1698
static $MPEGaudioFrequencyLookup;
1699
static $MPEGaudioChannelModeLookup;
1700
static $MPEGaudioModeExtensionLookup;
1701
static $MPEGaudioEmphasisLookup;
1702
if (empty($MPEGaudioVersionLookup)) {
1703
$MPEGaudioVersionLookup = getid3_mp3::MPEGaudioVersionArray();
1704
$MPEGaudioLayerLookup = getid3_mp3::MPEGaudioLayerArray();
1705
$MPEGaudioBitrateLookup = getid3_mp3::MPEGaudioBitrateArray();
1706
$MPEGaudioFrequencyLookup = getid3_mp3::MPEGaudioFrequencyArray();
1707
$MPEGaudioChannelModeLookup = getid3_mp3::MPEGaudioChannelModeArray();
1708
$MPEGaudioModeExtensionLookup = getid3_mp3::MPEGaudioModeExtensionArray();
1709
$MPEGaudioEmphasisLookup = getid3_mp3::MPEGaudioEmphasisArray();
1710
}
1711
1712
if (isset($MPEGaudioVersionLookup[$rawarray['version']])) {
1713
$decodedVersion = $MPEGaudioVersionLookup[$rawarray['version']];
1714
} else {
1715
echo ($echoerrors ? "\n".'invalid Version ('.$rawarray['version'].')' : '');
1716
return false;
1717
}
1718
if (isset($MPEGaudioLayerLookup[$rawarray['layer']])) {
1719
$decodedLayer = $MPEGaudioLayerLookup[$rawarray['layer']];
1720
} else {
1721
echo ($echoerrors ? "\n".'invalid Layer ('.$rawarray['layer'].')' : '');
1722
return false;
1723
}
1724
if (!isset($MPEGaudioBitrateLookup[$decodedVersion][$decodedLayer][$rawarray['bitrate']])) {
1725
echo ($echoerrors ? "\n".'invalid Bitrate ('.$rawarray['bitrate'].')' : '');
1726
if ($rawarray['bitrate'] == 15) {
1727
// known issue in LAME 3.90 - 3.93.1 where free-format has bitrate ID of 15 instead of 0
1728
// let it go through here otherwise file will not be identified
1729
if (!$allowBitrate15) {
1730
return false;
1731
}
1732
} else {
1733
return false;
1734
}
1735
}
1736
if (!isset($MPEGaudioFrequencyLookup[$decodedVersion][$rawarray['sample_rate']])) {
1737
echo ($echoerrors ? "\n".'invalid Frequency ('.$rawarray['sample_rate'].')' : '');
1738
return false;
1739
}
1740
if (!isset($MPEGaudioChannelModeLookup[$rawarray['channelmode']])) {
1741
echo ($echoerrors ? "\n".'invalid ChannelMode ('.$rawarray['channelmode'].')' : '');
1742
return false;
1743
}
1744
if (!isset($MPEGaudioModeExtensionLookup[$decodedLayer][$rawarray['modeextension']])) {
1745
echo ($echoerrors ? "\n".'invalid Mode Extension ('.$rawarray['modeextension'].')' : '');
1746
return false;
1747
}
1748
if (!isset($MPEGaudioEmphasisLookup[$rawarray['emphasis']])) {
1749
echo ($echoerrors ? "\n".'invalid Emphasis ('.$rawarray['emphasis'].')' : '');
1750
return false;
1751
}
1752
// These are just either set or not set, you can't mess that up :)
1753
// $rawarray['protection'];
1754
// $rawarray['padding'];
1755
// $rawarray['private'];
1756
// $rawarray['copyright'];
1757
// $rawarray['original'];
1758
1759
return true;
1760
}
1761
1762
static function MPEGaudioHeaderDecode($Header4Bytes) {
1763
// AAAA AAAA AAAB BCCD EEEE FFGH IIJJ KLMM
1764
// A - Frame sync (all bits set)
1765
// B - MPEG Audio version ID
1766
// C - Layer description
1767
// D - Protection bit
1768
// E - Bitrate index
1769
// F - Sampling rate frequency index
1770
// G - Padding bit
1771
// H - Private bit
1772
// I - Channel Mode
1773
// J - Mode extension (Only if Joint stereo)
1774
// K - Copyright
1775
// L - Original
1776
// M - Emphasis
1777
1778
if (strlen($Header4Bytes) != 4) {
1779
return false;
1780
}
1781
1782
$MPEGrawHeader['synch'] = (getid3_lib::BigEndian2Int(substr($Header4Bytes, 0, 2)) & 0xFFE0) >> 4;
1783
$MPEGrawHeader['version'] = (ord($Header4Bytes{1}) & 0x18) >> 3; // BB
1784
$MPEGrawHeader['layer'] = (ord($Header4Bytes{1}) & 0x06) >> 1; // CC
1785
$MPEGrawHeader['protection'] = (ord($Header4Bytes{1}) & 0x01); // D
1786
$MPEGrawHeader['bitrate'] = (ord($Header4Bytes{2}) & 0xF0) >> 4; // EEEE
1787
$MPEGrawHeader['sample_rate'] = (ord($Header4Bytes{2}) & 0x0C) >> 2; // FF
1788
$MPEGrawHeader['padding'] = (ord($Header4Bytes{2}) & 0x02) >> 1; // G
1789
$MPEGrawHeader['private'] = (ord($Header4Bytes{2}) & 0x01); // H
1790
$MPEGrawHeader['channelmode'] = (ord($Header4Bytes{3}) & 0xC0) >> 6; // II
1791
$MPEGrawHeader['modeextension'] = (ord($Header4Bytes{3}) & 0x30) >> 4; // JJ
1792
$MPEGrawHeader['copyright'] = (ord($Header4Bytes{3}) & 0x08) >> 3; // K
1793
$MPEGrawHeader['original'] = (ord($Header4Bytes{3}) & 0x04) >> 2; // L
1794
$MPEGrawHeader['emphasis'] = (ord($Header4Bytes{3}) & 0x03); // MM
1795
1796
return $MPEGrawHeader;
1797
}
1798
1799
static function MPEGaudioFrameLength(&$bitrate, &$version, &$layer, $padding, &$samplerate) {
1800
static $AudioFrameLengthCache = array();
1801
1802
if (!isset($AudioFrameLengthCache[$bitrate][$version][$layer][$padding][$samplerate])) {
1803
$AudioFrameLengthCache[$bitrate][$version][$layer][$padding][$samplerate] = false;
1804
if ($bitrate != 'free') {
1805
1806
if ($version == '1') {
1807
1808
if ($layer == '1') {
1809
1810
// For Layer I slot is 32 bits long
1811
$FrameLengthCoefficient = 48;
1812
$SlotLength = 4;
1813
1814
} else { // Layer 2 / 3
1815
1816
// for Layer 2 and Layer 3 slot is 8 bits long.
1817
$FrameLengthCoefficient = 144;
1818
$SlotLength = 1;
1819
1820
}
1821
1822
} else { // MPEG-2 / MPEG-2.5
1823
1824
if ($layer == '1') {
1825
1826
// For Layer I slot is 32 bits long
1827
$FrameLengthCoefficient = 24;
1828
$SlotLength = 4;
1829
1830
} elseif ($layer == '2') {
1831
1832
// for Layer 2 and Layer 3 slot is 8 bits long.
1833
$FrameLengthCoefficient = 144;
1834
$SlotLength = 1;
1835
1836
} else { // layer 3
1837
1838
// for Layer 2 and Layer 3 slot is 8 bits long.
1839
$FrameLengthCoefficient = 72;
1840
$SlotLength = 1;
1841
1842
}
1843
1844
}
1845
1846
// FrameLengthInBytes = ((Coefficient * BitRate) / SampleRate) + Padding
1847
if ($samplerate > 0) {
1848
$NewFramelength = ($FrameLengthCoefficient * $bitrate) / $samplerate;
1849
$NewFramelength = floor($NewFramelength / $SlotLength) * $SlotLength; // round to next-lower multiple of SlotLength (1 byte for Layer 2/3, 4 bytes for Layer I)
1850
if ($padding) {
1851
$NewFramelength += $SlotLength;
1852
}
1853
$AudioFrameLengthCache[$bitrate][$version][$layer][$padding][$samplerate] = (int) $NewFramelength;
1854
}
1855
}
1856
}
1857
return $AudioFrameLengthCache[$bitrate][$version][$layer][$padding][$samplerate];
1858
}
1859
1860
static function ClosestStandardMP3Bitrate($bit_rate) {
1861
static $standard_bit_rates = array (320000, 256000, 224000, 192000, 160000, 128000, 112000, 96000, 80000, 64000, 56000, 48000, 40000, 32000, 24000, 16000, 8000);
1862
static $bit_rate_table = array (0=>'-');
1863
$round_bit_rate = intval(round($bit_rate, -3));
1864
if (!isset($bit_rate_table[$round_bit_rate])) {
1865
if ($round_bit_rate > max($standard_bit_rates)) {
1866
$bit_rate_table[$round_bit_rate] = round($bit_rate, 2 - strlen($bit_rate));
1867
} else {
1868
$bit_rate_table[$round_bit_rate] = max($standard_bit_rates);
1869
foreach ($standard_bit_rates as $standard_bit_rate) {
1870
if ($round_bit_rate >= $standard_bit_rate + (($bit_rate_table[$round_bit_rate] - $standard_bit_rate) / 2)) {
1871
break;
1872
}
1873
$bit_rate_table[$round_bit_rate] = $standard_bit_rate;
1874
}
1875
}
1876
}
1877
return $bit_rate_table[$round_bit_rate];
1878
}
1879
1880
static function XingVBRidOffset($version, $channelmode) {
1881
static $XingVBRidOffsetCache = array();
1882
if (empty($XingVBRidOffset)) {
1883
$XingVBRidOffset = array (
1884
'1' => array ('mono' => 0x15, // 4 + 17 = 21
1885
'stereo' => 0x24, // 4 + 32 = 36
1886
'joint stereo' => 0x24,
1887
'dual channel' => 0x24
1888
),
1889
1890
'2' => array ('mono' => 0x0D, // 4 + 9 = 13
1891
'stereo' => 0x15, // 4 + 17 = 21
1892
'joint stereo' => 0x15,
1893
'dual channel' => 0x15
1894
),
1895
1896
'2.5' => array ('mono' => 0x15,
1897
'stereo' => 0x15,
1898
'joint stereo' => 0x15,
1899
'dual channel' => 0x15
1900
)
1901
);
1902
}
1903
return $XingVBRidOffset[$version][$channelmode];
1904
}
1905
1906
static function LAMEvbrMethodLookup($VBRmethodID) {
1907
static $LAMEvbrMethodLookup = array(
1908
0x00 => 'unknown',
1909
0x01 => 'cbr',
1910
0x02 => 'abr',
1911
0x03 => 'vbr-old / vbr-rh',
1912
0x04 => 'vbr-new / vbr-mtrh',
1913
0x05 => 'vbr-mt',
1914
0x06 => 'vbr (full vbr method 4)',
1915
0x08 => 'cbr (constant bitrate 2 pass)',
1916
0x09 => 'abr (2 pass)',
1917
0x0F => 'reserved'
1918
);
1919
return (isset($LAMEvbrMethodLookup[$VBRmethodID]) ? $LAMEvbrMethodLookup[$VBRmethodID] : '');
1920
}
1921
1922
static function LAMEmiscStereoModeLookup($StereoModeID) {
1923
static $LAMEmiscStereoModeLookup = array(
1924
0 => 'mono',
1925
1 => 'stereo',
1926
2 => 'dual mono',
1927
3 => 'joint stereo',
1928
4 => 'forced stereo',
1929
5 => 'auto',
1930
6 => 'intensity stereo',
1931
7 => 'other'
1932
);
1933
return (isset($LAMEmiscStereoModeLookup[$StereoModeID]) ? $LAMEmiscStereoModeLookup[$StereoModeID] : '');
1934
}
1935
1936
static function LAMEmiscSourceSampleFrequencyLookup($SourceSampleFrequencyID) {
1937
static $LAMEmiscSourceSampleFrequencyLookup = array(
1938
0 => '<= 32 kHz',
1939
1 => '44.1 kHz',
1940
2 => '48 kHz',
1941
3 => '> 48kHz'
1942
);
1943
return (isset($LAMEmiscSourceSampleFrequencyLookup[$SourceSampleFrequencyID]) ? $LAMEmiscSourceSampleFrequencyLookup[$SourceSampleFrequencyID] : '');
1944
}
1945
1946
static function LAMEsurroundInfoLookup($SurroundInfoID) {
1947
static $LAMEsurroundInfoLookup = array(
1948
0 => 'no surround info',
1949
1 => 'DPL encoding',
1950
2 => 'DPL2 encoding',
1951
3 => 'Ambisonic encoding'
1952
);
1953
return (isset($LAMEsurroundInfoLookup[$SurroundInfoID]) ? $LAMEsurroundInfoLookup[$SurroundInfoID] : 'reserved');
1954
}
1955
1956
static function LAMEpresetUsedLookup($LAMEtag) {
1957
1958
if ($LAMEtag['preset_used_id'] == 0) {
1959
// no preset used (LAME >=3.93)
1960
// no preset recorded (LAME <3.93)
1961
return '';
1962
}
1963
$LAMEpresetUsedLookup = array();
1964
1965
///// THIS PART CANNOT BE STATIC .
1966
for ($i = 8; $i <= 320; $i++) {
1967
switch ($LAMEtag['vbr_method']) {
1968
case 'cbr':
1969
$LAMEpresetUsedLookup[$i] = '--alt-preset '.$LAMEtag['vbr_method'].' '.$i;
1970
break;
1971
case 'abr':
1972
default: // other VBR modes shouldn't be here(?)
1973
$LAMEpresetUsedLookup[$i] = '--alt-preset '.$i;
1974
break;
1975
}
1976
}
1977
1978
// named old-style presets (studio, phone, voice, etc) are handled in GuessEncoderOptions()
1979
1980
// named alt-presets
1981
$LAMEpresetUsedLookup[1000] = '--r3mix';
1982
$LAMEpresetUsedLookup[1001] = '--alt-preset standard';
1983
$LAMEpresetUsedLookup[1002] = '--alt-preset extreme';
1984
$LAMEpresetUsedLookup[1003] = '--alt-preset insane';
1985
$LAMEpresetUsedLookup[1004] = '--alt-preset fast standard';
1986
$LAMEpresetUsedLookup[1005] = '--alt-preset fast extreme';
1987
$LAMEpresetUsedLookup[1006] = '--alt-preset medium';
1988
$LAMEpresetUsedLookup[1007] = '--alt-preset fast medium';
1989
1990
// LAME 3.94 additions/changes
1991
$LAMEpresetUsedLookup[1010] = '--preset portable'; // 3.94a15 Oct 21 2003
1992
$LAMEpresetUsedLookup[1015] = '--preset radio'; // 3.94a15 Oct 21 2003
1993
1994
$LAMEpresetUsedLookup[320] = '--preset insane'; // 3.94a15 Nov 12 2003
1995
$LAMEpresetUsedLookup[410] = '-V9';
1996
$LAMEpresetUsedLookup[420] = '-V8';
1997
$LAMEpresetUsedLookup[440] = '-V6';
1998
$LAMEpresetUsedLookup[430] = '--preset radio'; // 3.94a15 Nov 12 2003
1999
$LAMEpresetUsedLookup[450] = '--preset '.(($LAMEtag['raw']['vbr_method'] == 4) ? 'fast ' : '').'portable'; // 3.94a15 Nov 12 2003
2000
$LAMEpresetUsedLookup[460] = '--preset '.(($LAMEtag['raw']['vbr_method'] == 4) ? 'fast ' : '').'medium'; // 3.94a15 Nov 12 2003
2001
$LAMEpresetUsedLookup[470] = '--r3mix'; // 3.94b1 Dec 18 2003
2002
$LAMEpresetUsedLookup[480] = '--preset '.(($LAMEtag['raw']['vbr_method'] == 4) ? 'fast ' : '').'standard'; // 3.94a15 Nov 12 2003
2003
$LAMEpresetUsedLookup[490] = '-V1';
2004
$LAMEpresetUsedLookup[500] = '--preset '.(($LAMEtag['raw']['vbr_method'] == 4) ? 'fast ' : '').'extreme'; // 3.94a15 Nov 12 2003
2005
2006
return (isset($LAMEpresetUsedLookup[$LAMEtag['preset_used_id']]) ? $LAMEpresetUsedLookup[$LAMEtag['preset_used_id']] : 'new/unknown preset: '.$LAMEtag['preset_used_id'].' - report to info@getid3.org');
2007
}
2008
2009
}
2010
2011
?>
b'\\ No newline at end of file'
Loggerhead is a web-based interface for Breezy
Version: 2.0.1