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File: sequencer.php

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  Classes of Fluxus  >  MIDI Class  >  sequencer.php  >  Download  
File: sequencer.php
Role: Example script
Content type: text/plain
Description: little online sequencer, 4 drum tracks, 4 instrument tracks, 1 bar only
Class: MIDI Class
Read, write and manipulate MIDI files and data
Author: By
Last change: improved
Date: 11 years ago
Size: 8,851 bytes
 

Contents

Class file image Download
<?php
session_start
();
$save_dir = 'tmp/sess_'.session_id().'/';

//clean up
$sessions = array();
$handle = opendir (session_save_path());
while (
false !== ($file = readdir ($handle)))
    if (
$file!='.' && $file!='..') $sessions[] = $file;
closedir($handle);
$handle = opendir('tmp/');
while (
false !== ($dir = readdir ($handle)))
    if (
is_dir($dir) && $dir!='.' && $dir!='..' && !in_array($dir,$sessions)) rm("tmp/$dir/");
closedir($handle);

// removes non-empty dir
function rm($dir){
   
$handle = opendir($dir);
    while (
false !== ($file = readdir ($handle)))
        if (
$file!='.' && $file!='..') unlink("$dir/$file");
   
closedir($handle);
   
rmdir($dir);
}

if (!
is_dir('tmp')) mkdir('tmp');
if (!
is_dir($save_dir)) mkdir($save_dir);

//---------------------------------------------
require('midi.class.php');

$midi = new Midi();

$instruments = $midi->getInstrumentList();
$drumset = $midi->getDrumset();
$drumkit = $midi->getDrumkitList();
$notes = $midi->getNoteList();
//---------------------------------------------

$p=$_POST;$g=$_GET; //'cause I'm lazy

srand((double)microtime()*1000000);
$rand = rand();
$f = $rand.'.mid';
$file = $save_dir.$f;

if (isset(
$g['download'])){
   
$file = $g['download'];
   
$filename = 'output.mid';
   
$midi->downloadMidFile($file,$filename);
}

if (isset(
$p['publish'])){
    unset(
$p['plug']);
    if (isset(
$p['showTxt'])) unset($p['showTxt']);
    if (isset(
$p['showXml'])) unset($p['showXml']);
   
   
$str = serialize($p);
   
$m=fopen("mix/$rand.mix","wb");
   
fwrite($m, $str);
    @
fclose($m);
    echo
"your mix has been published as $rand.mix!";
}

if (isset(
$g['mix'])){
   
$mixfile = 'mix/'.$g['mix'];
   
$m=fopen($mixfile,"r");
   
$str = fread($m, filesize($mixfile));
    @
fclose($m);
   
$p = unserialize($str);
   
$p['play'] = 1;
}

//DEFAULTS
$loop = isset($p['noloop'])?0:1;
$rep = isset($p['rep'])?$p['rep']:4;
$plug = isset($p['plug'])?$p['plug']:(isset($g['plug'])?$g['plug']:'wm');
$play = isset($p['play'])?1:0;
$bpm = isset($p['bpm'])?$p['bpm']:150;

$aktiv=array();
$inst=array();
$note=array();
$vol=array();

for (
$k=1;$k<=8;$k++){
   
$aktiv[$k] = isset($p["aktiv$k"])?1:0;
   
$inst[$k] = isset($p["inst$k"])?$p["inst$k"]:0;
   
$note[$k] = isset($p["note$k"])?$p["note$k"]:35;
   
$vol[$k] = isset($p["vol$k"])?$p["vol$k"]:127;
}
//if (!isset($p['last'])) $aktiv[1]=1; //first call
?>

<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=iso-8859-1" />
<title>Sequencer</title>
<style>
body {font-family:arial;font-size:11px;margin:5px;}
td {font-family:arial;font-size:11px}
select {font-family:arial;font-size:11px}
option {font-family:arial;font-size:11px}
input {font-family:arial;font-size:11px}
a,a:link,a:visited,a:active {font-family:arial;font-size:11px;color:#000000;}
a:hover {font-family:font-family:arial;font-size:11px;color:#666666;}
</style>
</head>
<body>
<form action="sequencer.php" method="POST" onsubmit="b=0;for(i=1;i<9;i++)b|=this['aktiv'+i].checked;if(b==0){alert('You have to activate at least one track!');return false};">
<input type="hidden" name="PHPSESSID" value="<?php echo session_id()?>">
<table border=0 cellpadding=2 cellspacing=0><tr><td>
<table border=0 cellpadding=2 cellspacing=0 bgcolor="#DADADA">

<!-- DRUMS -->
<tr bgcolor="#333333"><td>&nbsp;</td><td colspan=7 style="color:#FFFFFF"><b>Drum tracks</b></td></tr>
<tr bgcolor="#BBBBBB"><td align="center">on</td><td>instrument</td><td>drum kit</td><td>vol</td><td colspan=4>pattern</td></tr>
<?php
for ($k=1;$k<=4;$k++){
?>
<tr>
<td><input type="checkbox" name="aktiv<?php echo $k?>"<?php echo $aktiv[$k]?' checked':''?>></td>
<td>
<select name="note<?php echo $k?>">
<?php
   
for ($i=0;$i<128;$i++)
        if (isset(
$drumset[$i]))
            echo
'<OPTION value="'.$i.'"'.($note[$k]==$i?' selected':'').'>0'.$i.'&nbsp;&nbsp;'.$drumset[$i]."</OPTION>\n";
        else{
           
$num = ($i<10)?"00$i":($i<100?"0$i":"$i");
            echo
'<OPTION value="'.($i).'"'.($note[$k]==$i?' selected':'').'>'.$num."</OPTION>\n";
        };
?>
</select>
</td>
<td>
<select name="inst<?php echo $k?>">
<?php
   
foreach ($drumkit as $key=>$val) echo "<option value=$key ".(($inst[$k]==$key)?' selected':'').">$val</option>\n";
?>
</select>
</td>
<td>
<select name="vol<?php echo $k?>">
<?php
   
for ($i=127;$i>=0;$i--)
        echo
"<OPTION value=\"$i\"".($vol[$k]==$i?' selected':'').">$i</OPTION>\n";
?>
</select>
</td>
<td bgcolor="#DADADA">
<?php
   
for ($i=0;$i<16;$i++) {
        echo
"<input type=\"checkbox\" name=\"n$k$i\"".(isset($p["n$k$i"])?' checked':'').">\n";
        if (
$i<15&&$i%4==3) echo '</td><td'.($i%8==3?' bgcolor="#EEEEEE"':' bgcolor="#DADADA"').'>';
    }
}
?>
</td>
</tr>


<!-- INSTRUMENTS -->
<tr bgcolor="#333333"><td>&nbsp;</td><td colspan=7 style="color:#FFFFFF"><b>Instrument tracks</b></td></tr>
<tr bgcolor="#BBBBBB"><td align="center">on</td><td>instrument</td><td>note</td><td>vol</td><td colspan=4>pattern</td></tr>
<?php
for ($k=5;$k<=8;$k++){
?>
<tr>
<td><input type="checkbox" name="aktiv<?php echo $k?>"<?php echo $aktiv[$k]?' checked':''?>></td>
<td>
<select name="inst<?php echo $k?>">
<?php
   
for ($i=0;$i<128;$i++){
       
$num = ($i<10)?"00$i":($i<100?"0$i":"$i");
        echo
'<OPTION value="'.($i).'"'.($inst[$k]==$i?' selected':'').'>'.$num.'&nbsp;&nbsp;'.$instruments[$i]."</OPTION>\n";
    }
?>
</select>
</td>
<td>
<select name="note<?php echo $k?>">
<?php
   
for ($i=0;$i<128;$i++)
        echo
'<OPTION value="'.($i).'"'.($note[$k]==$i?' selected':'').'>'.$notes[$i]."</OPTION>\n";
?>
</select>
</td>
<td>
<select name="vol<?php echo $k?>">
<?php
   
for ($i=127;$i>=0;$i--)
        echo
"<OPTION value=\"$i\"".($vol[$k]==$i?' selected':'').">$i</OPTION>\n";
?>
</select>
</td>
<td>
<?php
   
for ($i=0;$i<16;$i++) {
        echo
"<input type=\"checkbox\" name=\"n$k$i\"".(isset($p["n$k$i"])?' checked':'').">\n";
        if (
$i<15&&$i%4==3) echo '</td><td'.($i%8==3?' bgcolor="#EEEEEE"':'').'>';
    }
}
?>
</td>
</tr>
<tr><td colspan=8 bgcolor="#FFFFFF">

<br><br>

<input type="text" name="bpm" size=3 value="<?php echo $bpm?>"> bpm<br>
<input type="text" name="rep" size=3 value="<?php echo $rep?>"> bar repetitions<br>
<input type="checkbox" name="noloop"<?php echo !$loop?' checked':''?>>don't loop<br>
<input type="radio" name="plug" value="bk"<?php echo $plug=='bk'?' checked':''?>>Beatnik
<input type="radio" name="plug" value="qt"<?php echo $plug=='qt'?' checked':''?>>QuickTime
<input type="radio" name="plug" value="wm"<?php echo $plug=='wm'?' checked':''?>>Windows Media
<input type="radio" name="plug" value="jv"<?php echo $plug=='jv'?' checked':''?>>Java Applet
<input type="radio" name="plug" value=""<?php echo $plug==''?' checked':''?>>other (default Player)
<br>
<input type="checkbox" name="showTxt"<?php echo isset($p['showTxt'])?' checked':''?>>show MIDI result as Text<br>
<input type="checkbox" name="showXml"<?php echo isset($p['showXml'])?' checked':''?>>show MIDI result as XML
<br><br>
<input type="submit" name="play" value=" PLAY! ">&nbsp;&nbsp;
<input type="submit" name="publish" value="Publish">&nbsp;&nbsp;<br><br>
</form>

<?php

if ($play){
   
$midi->open(480); //timebase=480, quarter note=120
   
$midi->setBpm($bpm);
   
    for (
$k=1;$k<=8;$k++) if ($aktiv[$k]){
       
$ch = ($k<5)?10:$k;
       
$inst = $p["inst$k"];
       
$n = $p["note$k"];
       
$v = $p["vol$k"];
       
$t = 0;
       
$ts = 0;
       
$tn = $midi->newTrack() - 1;
       
       
$midi->addMsg($tn, "0 PrCh ch=$ch p=$inst");
        for (
$r=0;$r<$rep;$r++){
            for (
$i=0;$i<16;$i++){
                if (
$ts == $t+120) $midi->addMsg($tn, "$ts Off ch=$ch n=$n v=127");
               
$midi->addMsg($tn, "$ts Off ch=$ch n=$n v=127");
                if (isset(
$p["n$k$i"])){
                   
$t = $ts;
                   
$midi->addMsg($tn, "$t On ch=$ch n=$n v=$v");
                }
               
$ts += 120;
            }
           
$midi->addMsg($tn, "$ts Off ch=$ch n=$n v=127");
        }
       
$midi->addMsg($tn, "$ts Meta TrkEnd");
    }
   
$midi->saveMidFile($file);
   
$midi->playMidFile($file,1,1,$loop,$plug);
?>
    <br><br>
    <input type="button" name="download" value="Save as SMF (*.mid)" onClick="self.location.href='sequencer.php?download=<?php echo urlencode($file)?>'">
<?php
}
?>
</td></tr></table>
</td>
<td width=10>&nbsp;</td>
<td valign="top">

<table width=140 border=0 cellpadding=2 cellspacing=0 bgcolor="#DADADA">
<tr bgcolor="#333333"><td colspan=7 style="color:#FFFFFF"><b>Published Mixes</b></td></tr>
<tr><td>
<?php
$handle
=opendir ('mix');
while (
false !== ($file = readdir ($handle)))
    if (
$file!='.' && $file!='..') echo "<a href=\"sequencer.php?mix=$file&plug=$plug\">$file</a><br>\n";
closedir($handle);
?>
<br>
</td></tr></table>

</td></tr></table>
<?php
if (isset($p['showTxt'])) echo '<hr><pre>'.$midi->getTxt().'</pre>';
if (isset(
$p['showXml'])) echo '<hr><pre>'.htmlspecialchars($midi->getXml()).'</pre>';
?>
</body>
</html>