142a27035SAndreas Gohr<?php 242a27035SAndreas Gohr/** 342a27035SAndreas Gohr * CAPTCHA antispam plugin - sound generator 442a27035SAndreas Gohr * 542a27035SAndreas Gohr * @license GPL 2 (http://www.gnu.org/licenses/gpl.html) 642a27035SAndreas Gohr * @author Andreas Gohr <gohr@cosmocode.de> 742a27035SAndreas Gohr */ 842a27035SAndreas Gohr 942a27035SAndreas Gohrif(!defined('DOKU_INC')) define('DOKU_INC',realpath(dirname(__FILE__).'/../../../').'/'); 1042a27035SAndreas Gohrdefine('NOSESSION',true); 1142a27035SAndreas Gohrdefine('DOKU_DISABLE_GZIP_OUTPUT', 1); 1242a27035SAndreas Gohrrequire_once(DOKU_INC.'inc/init.php'); 1342a27035SAndreas Gohrrequire_once(DOKU_INC.'inc/auth.php'); 1442a27035SAndreas Gohr 1542a27035SAndreas Gohr$ID = $_REQUEST['id']; 16*77e00bf9SAndreas Gohr$plugin = plugin_load('helper','captcha'); 1742a27035SAndreas Gohr$rand = PMA_blowfish_decrypt($_REQUEST['secret'],auth_cookiesalt()); 1842a27035SAndreas Gohr$code = strtolower($plugin->_generateCAPTCHA($plugin->_fixedIdent(),$rand)); 1942a27035SAndreas Gohr 2042a27035SAndreas Gohr// prepare an array of wavfiles 2142a27035SAndreas Gohr$lc = dirname(__FILE__).'/lang/'.$conf['lang'].'/audio/'; 2242a27035SAndreas Gohr$en = dirname(__FILE__).'/lang/en/audio/'; 2342a27035SAndreas Gohr$wavs = array(); 2442a27035SAndreas Gohrfor($i=0;$i<5;$i++){ 2542a27035SAndreas Gohr $file = $lc.$code{$i}.'.wav'; 2642a27035SAndreas Gohr if(!@file_exists($file)) $file = $en.$code{$i}.'.wav'; 2742a27035SAndreas Gohr $wavs[] = $file; 2842a27035SAndreas Gohr} 2942a27035SAndreas Gohr 3042a27035SAndreas Gohrheader('Content-type: audio/x-wav'); 3142a27035SAndreas Gohrheader('Content-Disposition: attachment;filename=captcha.wav'); 3242a27035SAndreas Gohr 3342a27035SAndreas Gohrecho joinwavs($wavs); 3442a27035SAndreas Gohr 3542a27035SAndreas Gohr 3642a27035SAndreas Gohr/** 3742a27035SAndreas Gohr * Join multiple wav files 3842a27035SAndreas Gohr * 3942a27035SAndreas Gohr * All wave files need to have the same format and need to be uncompressed. 4042a27035SAndreas Gohr * The headers of the last file will be used (with recalculated datasize 4142a27035SAndreas Gohr * of course) 4242a27035SAndreas Gohr * 4342a27035SAndreas Gohr * @link http://ccrma.stanford.edu/CCRMA/Courses/422/projects/WaveFormat/ 4442a27035SAndreas Gohr * @link http://www.thescripts.com/forum/thread3770.html 4542a27035SAndreas Gohr */ 4642a27035SAndreas Gohrfunction joinwavs($wavs){ 4742a27035SAndreas Gohr $fields = join('/',array( 'H8ChunkID', 'VChunkSize', 'H8Format', 4842a27035SAndreas Gohr 'H8Subchunk1ID', 'VSubchunk1Size', 4942a27035SAndreas Gohr 'vAudioFormat', 'vNumChannels', 'VSampleRate', 5042a27035SAndreas Gohr 'VByteRate', 'vBlockAlign', 'vBitsPerSample' )); 5142a27035SAndreas Gohr 5242a27035SAndreas Gohr $data = ''; 5342a27035SAndreas Gohr foreach($wavs as $wav){ 5442a27035SAndreas Gohr $fp = fopen($wav,'rb'); 5542a27035SAndreas Gohr $header = fread($fp,36); 5642a27035SAndreas Gohr $info = unpack($fields,$header); 5742a27035SAndreas Gohr 5842a27035SAndreas Gohr // read optional extra stuff 5942a27035SAndreas Gohr if($info['Subchunk1Size'] > 16){ 6042a27035SAndreas Gohr $header .= fread($fp,($info['Subchunk1Size']-16)); 6142a27035SAndreas Gohr } 6242a27035SAndreas Gohr 6342a27035SAndreas Gohr // read SubChunk2ID 6442a27035SAndreas Gohr $header .= fread($fp,4); 6542a27035SAndreas Gohr 6642a27035SAndreas Gohr // read Subchunk2Size 6742a27035SAndreas Gohr $size = unpack('vsize',fread($fp, 4)); 6842a27035SAndreas Gohr $size = $size['size']; 6942a27035SAndreas Gohr 7042a27035SAndreas Gohr // read data 7142a27035SAndreas Gohr $data .= fread($fp,$size); 7242a27035SAndreas Gohr } 7342a27035SAndreas Gohr 7442a27035SAndreas Gohr return $header.pack('V',strlen($data)).$data; 7542a27035SAndreas Gohr} 7642a27035SAndreas Gohr 77