Файл: moduls/class/mp3.class.php
Строк: 237
<?php
/*
//Merge two files
$path = 'path.mp3';
$path1 = 'path1.mp3';
$mp3 = new mp3($path);
$newpath = 'path.mp3';
$mp3->striptags();
$mp3_1 = new mp3($path1);
$mp3->mergeBehind($mp3_1);
$mp3->striptags();
$mp3->setIdv3_2('01','Track Title','Artist','Album','Year','Genre','Comments','Composer','OrigArtist',
'Copyright','url','encodedBy');
$mp3->save($newpath);
//Extract 30 seconds starting after 10 seconds.
$path = 'path.mp3';
$mp3 = new mp3($path);
$mp3_1 = $mp3->extract(10,30);
$mp3_1->save('newpath.mp3');
//Extract the exact length of time
$path = 'path.mp3';
$mp3 = new mp3($path);
$mp3->setFileInfoExact();
echo $mp3->time;
//note that this is the exact length!
*/
//
// taken from: http://www.sourcerally.net/Scripts/20-PHP-MP3-Class
//
class mp3
{
var $str;
var $time;
var $frames;
function mp3($path = '')
{
if ($path != '') {
$this->str = file_get_contents($path);
}
}
function setStr($str)
{
$this->str = $str;
}
function getStart()
{
$currentStrPos = -1;
while (true) {
$currentStrPos = strpos($this->str, chr(255), $currentStrPos + 1);
if ($currentStrPos === false) {
return 0;
}
$str = substr($this->str, $currentStrPos, 4);
$strlen = strlen($str);
$parts = array();
for ($i = 0; $i < $strlen; ++$i) {
$parts[] = $this->decbinFill(ord($str[$i]), 8);
}
if ($this->doFrameStuff($parts) === false) {
continue;
}
return $currentStrPos;
}
}
function setFileInfoExact()
{
$maxStrLen = strlen($this->str);
$currentStrPos = $this->getStart();
$framesCount = $time = 0;
while ($currentStrPos < $maxStrLen) {
$str = substr($this->str, $currentStrPos, 4);
$strlen = strlen($str);
$parts = array();
for ($i = 0; $i < $strlen; ++$i) {
$parts[] = $this->decbinFill(ord($str[$i]), 8);
}
if ($parts[0] != '11111111') {
if (($maxStrLen - 128) > $currentStrPos) {
return false;
} else {
$this->time = $time;
$this->frames = $framesCount;
return true;
}
}
$a = $this->doFrameStuff($parts);
$currentStrPos += $a[0];
$time += $a[1];
$framesCount++;
}
$this->time = $time;
$this->frames = $framesCount;
return true;
}
function extract($start, $length)
{
$maxStrLen = strlen($this->str);
$currentStrPos = $this->getStart();
$framesCount = $time = 0;
$startCount = $endCount = -1;
while ($currentStrPos < $maxStrLen) {
if ($startCount == -1 && $time >= $start) {
$startCount = $currentStrPos;
}
if ($endCount == -1 && $time >= ($start + $length)) {
$endCount = $currentStrPos - $startCount;
}
$doFrame = true;
$str = substr($this->str, $currentStrPos, 4);
$strlen = strlen($str);
$parts = array();
for ($i = 0; $i < $strlen; ++$i) {
$parts[] = $this->decbinFill(ord($str[$i]), 8);
}
if ($parts[0] != '11111111') {
if (($maxStrLen - 128) > $currentStrPos) {
$doFrame = false;
} else {
$doFrame = false;
}
}
if ($doFrame) {
$a = $this->doFrameStuff($parts);
$currentStrPos += $a[0];
$time += $a[1];
$framesCount++;
} else {
break;
}
}
$mp3 = new mp3();
if ($endCount == -1) {
$endCount = $maxStrLen - $startCount;
}
if ($startCount != -1 && $endCount != -1) {
$mp3->setStr(substr($this->str, $startCount, $endCount));
}
return $mp3;
}
function decbinFill($dec, $length = 0)
{
$str = decbin($dec);
$nulls = $length - strlen($str);
if ($nulls > 0) {
for ($i = 0; $i < $nulls; ++$i) {
$str = '0' . $str;
}
}
return $str;
}
function doFrameStuff($parts)
{
//Get Audio Version
$seconds = 0;
$errors = array();
switch (substr($parts[1], 3, 2)) {
case '00':
$audio = 2.5;
break;
case '10':
$audio = 2;
break;
case '11':
$audio = 1;
break;
default:
return false;
break;
}
//Get Layer
switch (substr($parts[1], 5, 2)) {
case '01':
$layer = 3;
break;
case '10':
$layer = 2;
break;
default:
return false;
break;
}
//Get Bitrate
$bitFlag = substr($parts[2], 0, 4);
$bitArray = array(
'0000' => array(0, 0, 0, 0, 0),
'0001' => array(32, 32, 32, 32, 8),
'0010' => array(64, 48, 40, 48, 16),
'0011' => array(96, 56, 48, 56, 24),
'0100' => array(128, 64, 56, 64, 32),
'0101' => array(160, 80, 64, 80, 40),
'0110' => array(192, 96, 80, 96, 48),
'0111' => array(224, 112, 96, 112, 56),
'1000' => array(256, 128, 112, 128, 64),
'1001' => array(288, 160, 128, 144, 80),
'1010' => array(320, 192, 160, 160, 96),
'1011' => array(352, 224, 192, 176, 112),
'1100' => array(384, 256, 224, 192, 128),
'1101' => array(416, 320, 256, 224, 144),
'1110' => array(448, 384, 320, 256, 160),
'1111' => array(-1, -1, -1, -1, -1)
);
$bitPart = $bitArray[$bitFlag];
$bitArrayNumber;
if ($audio == 1) {
switch ($layer) {
case 1:
$bitArrayNumber = 0;
break;
case 2:
$bitArrayNumber = 1;
break;
case 3:
$bitArrayNumber = 2;
break;
}
} else {
switch ($layer) {
case 1:
$bitArrayNumber = 3;
break;
case 2:
$bitArrayNumber = 4;
break;
case 3:
$bitArrayNumber = 4;
break;
}
}
$bitRate = $bitPart[$bitArrayNumber];
if ($bitRate <= 0) {
return false;
}
//Get Frequency
$frequencies = array(
1 => array('00' => 44100, '01' => 48000, '10' => 32000, '11' => 'reserved'),
2 => array(),
2.5 => array()
);
$freq = $frequencies[$audio][substr($parts[2], 4, 2)];
//IsPadded?
$padding = substr($parts[2], 6, 1);
//FrameLengthInBytes = 144 * BitRate / SampleRate + Padding
$frameLength = floor(144 * $bitRate * 1000 / $freq + $padding);
if (!$frameLength) {
return false;
}
$seconds += $frameLength * 8 / ($bitRate * 1000);
return array($frameLength, $seconds);
//Calculate next when next frame starts.
//Capture next frame.
}
function setIdv3_2($track, $title, $artist, $album, $year, $genre, $comments, $composer, $origArtist, $copyright, $url, $encodedBy)
{
$urlLength = strlen($url) + 2;
$copyrightLength = strlen($copyright) + 1;
$origArtistLength = strlen($origArtist) + 1;
$composerLength = strlen($composer) + 1;
$commentsLength = strlen($comments) + 5;
$titleLength = strlen($title) + 1;
$artistLength = strlen($artist) + 1;
$albumLength = strlen($album) + 1;
$genreLength = strlen($genre) + 1;
$encodedByLength = strlen($encodedBy) + 1;
$trackLength = strlen($track) + 1;
$yearLength = strlen($year) + 1;
$str = '';
$str .= chr(73); //I
$str .= chr(68); //D
$str .= chr(51); //3
$str .= chr(3); //.
$str .= chr(0); //
$str .= chr(0); //
$str .= chr(0); //
$str .= chr(0); //
$str .= chr(8); //.
$str .= chr(53); //5
$str .= chr(84); //T
$str .= chr(82); //R
$str .= chr(67); //C
$str .= chr(75); //K
$str .= chr(0); //
$str .= chr(0); //
$str .= chr(0); //
$str .= chr($trackLength); //.
$str .= chr(0); //
$str .= chr(0); //
$str .= chr(0); //
$str .= $track;
$str .= chr(84); //T
$str .= chr(69); //E
$str .= chr(78); //N
$str .= chr(67); //C
$str .= chr(0); //
$str .= chr(0); //
$str .= chr(0); //
$str .= chr($encodedByLength); //
$str .= chr(64); //@
$str .= chr(0); //
$str .= chr(0); //
$str .= $encodedBy;
$str .= chr(87); //W
$str .= chr(88); //X
$str .= chr(88); //X
$str .= chr(88); //X
$str .= chr(0); //
$str .= chr(0); //
$str .= chr(0); //
$str .= chr($urlLength); //.
$str .= chr(0); //
$str .= chr(0); //
$str .= chr(0); //
$str .= chr(0); //
$str .= $url;
$str .= chr(84); //T
$str .= chr(67); //C
$str .= chr(79); //O
$str .= chr(80); //P
$str .= chr(0); //
$str .= chr(0); //
$str .= chr(0); //
$str .= chr($copyrightLength); //
$str .= chr(0); //
$str .= chr(0); //
$str .= chr(0); //
$str .= $copyright;
$str .= chr(84); //T
$str .= chr(79); //O
$str .= chr(80); //P
$str .= chr(69); //E
$str .= chr(0); //
$str .= chr(0); //
$str .= chr(0); //
$str .= chr($origArtistLength); //
$str .= chr(0); //
$str .= chr(0); //
$str .= chr(0); //
$str .= $origArtist;
$str .= chr(84); //T
$str .= chr(67); //C
$str .= chr(79); //O
$str .= chr(77); //M
$str .= chr(0); //
$str .= chr(0); //
$str .= chr(0); //
$str .= chr($composerLength); //
$str .= chr(0); //
$str .= chr(0); //
$str .= chr(0); //
$str .= $composer;
$str .= chr(67); //C
$str .= chr(79); //O
$str .= chr(77); //M
$str .= chr(77); //M
$str .= chr(0); //
$str .= chr(0); //
$str .= chr(0); //
$str .= chr($commentsLength); //.
$str .= chr(0); //
$str .= chr(0); //
$str .= chr(0); //
$str .= chr(0); //
$str .= chr(9); //
$str .= chr(0); //
$str .= chr(0); //
$str .= $comments;
$str .= chr(84); //T
$str .= chr(67); //C
$str .= chr(79); //O
$str .= chr(78); //N
$str .= chr(0); //
$str .= chr(0); //
$str .= chr(0); //
$str .= chr($genreLength); //
$str .= chr(0); //
$str .= chr(0); //
$str .= chr(0); //
$str .= $genre;
$str .= chr(84); //T
$str .= chr(89); //Y
$str .= chr(69); //E
$str .= chr(82); //R
$str .= chr(0); //
$str .= chr(0); //
$str .= chr(0); //
$str .= chr($yearLength); //.
$str .= chr(0); //
$str .= chr(0); //
$str .= chr(0); //
$str .= $year;
$str .= chr(84); //T
$str .= chr(65); //A
$str .= chr(76); //L
$str .= chr(66); //B
$str .= chr(0); //
$str .= chr(0); //
$str .= chr(0); //
$str .= chr($albumLength); //.
$str .= chr(0); //
$str .= chr(0); //
$str .= chr(0); //
$str .= $album;
$str .= chr(84); //T
$str .= chr(80); //P
$str .= chr(69); //E
$str .= chr(49); //1
$str .= chr(0); //
$str .= chr(0); //
$str .= chr(0); //
$str .= chr($artistLength); //
$str .= chr(0); //
$str .= chr(0); //
$str .= chr(0); //
$str .= $artist;
$str .= chr(84); //T
$str .= chr(73); //I
$str .= chr(84); //T
$str .= chr(50); //2
$str .= chr(0); //
$str .= chr(0); //
$str .= chr(0); //
$str .= chr($titleLength); //.
$str .= chr(0); //
$str .= chr(0); //
$str .= chr(0); //
$str .= $title;
$this->str = $str . $this->str;
}
function mergeBehind(mp3 $mp3)
{
$this->str .= $mp3->str;
}
function mergeInfront(mp3 $mp3)
{
$this->str = $mp3->str . $this->str;
}
function getIdvEnd()
{
$str = substr($this->str, (strlen($this->str) - 128));
if (strtolower(substr($str, 0, 3)) == 'tag') {
return $str;
} else {
return false;
}
}
function striptags()
{
//Remove start stuff...
$newStr = '';
$s = $start = $this->getStart();
if ($s === false) {
return false;
} else {
$this->str = substr($this->str, $start);
}
//Remove end tag stuff
$end = $this->getIdvEnd();
if ($end !== false) {
$this->str = substr($this->str, 0, (strlen($this->str) - 129));
}
}
function save($path)
{
$fp = fopen($path, 'w');
fwrite($fp, $this->str);
fclose($fp);
}
//join various MP3s
function multiJoin($newpath, $array)
{
foreach ($array as $path) {
$mp3 = new mp3($path);
$mp3->striptags();
$mp3_1 = new mp3($newpath);
$mp3->mergeBehind($mp3_1);
$mp3->save($newpath);
}
}
}
?>