94 lines
2.4 KiB
PHP
94 lines
2.4 KiB
PHP
<?php
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namespace SJBR\SrFreecap\Utility;
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/*
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* Copyright notice
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*
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* (c) 2012-2020 Stanislas Rolland <typo32020(arobas)sjbr.ca>
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* All rights reserved
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*
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* This script is part of the TYPO3 project. The TYPO3 project is
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* free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* The GNU General Public License can be found at
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* http://www.gnu.org/copyleft/gpl.html.
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* A copy is found in the textfile GPL.txt and important notices to the license
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* from the author is found in LICENSE.txt distributed with these scripts.
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*
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* This script is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* This copyright notice MUST APPEAR in all copies of the script!
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*/
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/**
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* Utility dealing with mp3 audio content
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* See http://www.theblog.ca/merge-mp3s-php
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*/
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class Mp3ContentUtility
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{
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var $mp3Content;
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// Create a new mp3
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public function __construct($file = '')
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{
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if ($file != '') {
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$this->mp3Content = file_get_contents($file);
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}
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}
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// Get the mp3 content
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public function getContent()
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{
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return $this->mp3Content;
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}
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// Calculate where's the beginning of the sound file
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protected function getStart()
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{
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$strlen = strlen($this->mp3Content);
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for ($i=0; $i < $strlen; $i++) {
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$v = substr($this->mp3Content, $i, 1);
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$value = ord($v);
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if ($value == 255) {
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return $i;
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}
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}
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}
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// Calculate where's the end of the sound file
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protected function getIdvEnd()
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{
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$strlen = strlen($this->mp3Content);
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$str = substr($this->mp3Content, ($strlen - 128));
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$str1 = substr($str, 0, 3);
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if (strtolower($str1) == strtolower('TAG')) {
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return $str;
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} else {
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return false;
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}
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}
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// Remove the ID3 tags
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public function striptags()
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{
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// Remove start stuff...
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$newStr = '';
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$s = $start = $this->getStart();
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if ($s === false) {
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return false;
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} else {
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$this->mp3Content = substr($this->mp3Content, $start);
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}
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//Remove end tag stuff
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$end = $this->getIdvEnd();
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if ($end !== false) {
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$this->mp3Content = substr($this->mp3Content, 0, (strlen($this->mp3Content)-129));
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}
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return $this->mp3Content;
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}
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} |