Eu consegui essa biblioteca na internet, mas ela só identifica as tags e, pelo o q eu vi, parece q não dá pra faze-las do nada. Isso é pq eu não entendi como ela funciona, queria saber se alguem podia me ajudar a dar uma decifrada nela...
tá anexa, vou postar no próximo um teste que eu tava fazendo pra ver se ela funcionava msm
vlw pela ajuda
====================
mp3_id3.php:
<?
// This function parse ID3 tag from MP3 file. It's quite fast.
// syntax mp3_id(filename)
// function will return -1 if file not exists or no frame cynch found at the beginning of file.
// I realized that some songs downloaded thru gnutella have about four lines of text info at the
// beginning. it seepms players can handle. so I will implement it later. variable bitrates are
// not yet implemented, as they are quite slow to check. you can find them to read lot of first
// frames and check their bitrates. If theyre not the same, its variable bitrate. and also you
// then cannot compute real song lenght, unless you will scan the whole file for frames and compute
// its lenght... (at least what I read) there is second version of ID3 tag which is tagged at
// the beginning of the file and its quite large. you can learnt more about at http://www.id3.org/.
// I dont finding this so interesting. there are too good things on new version: you can write more
// than 30 chars at field and the tag is on the beginning of file. there are so many fields in v2
// that I found really unusefull in many case. while it seems that id3v2 will still write tag v1
// at the end, I can see no reason why to implement it, cos it is really 'slow' to parse all these
// informations.
// You can use 'genres' to determine what means the 'genreid' number. if you think you will not need
// it, delete it to. And also we need to specify all variables for mp3 header.
$genres=Array("Not Set","Classic Rock","Country","Dance","Disco","Funk","Grunge","Hip-Hop","Jazz",
"Metal","New Age","Oldies","Other","Pop","R&B","Rap","Reggae","Rock","Techno",
"Industrial","Alternative","Ska","Death Metal","Pranks","Soundtrack","Euro-Techno",
"Ambient","Trip-Hop","Vocal","Jazz+Funk","Fusion","Trance","Classical",
"Instrumental","Acid","House","Game","Sound Clip","Gospel","Noise","AlternRock",
"Bass","Soul","Punk","Space","Meditative","Instrumental Pop","Instrumental Rock",
"Ethnic","Gothic","Darkwave","Techno-Industrial","Electronic","Pop-Folk",
"Eurodance","Dream","Southern Rock","Comedy","Cult","Gangsta","Top 40",
"Christian Rap","Pop/Funk","Jungle","Native American","Cabaret","New Wave",
"Psychadelic","Rave","Showtunes","Trailer","Lo-Fi","Tribal","Acid Punk",
"Acid Jazz","Polka","Retro","Musical","Rock & Roll","Hard Rock","Folk",
"Folk/Rock","National Folk","Swing","Bebob","Latin","Revival","Celtic",
"Bluegrass","Avantgarde","Gothic Rock","Progressive Rock","Psychedelic Rock",
"Symphonic Rock","Slow Rock","Big Band","Chorus","Easy Listening","Acoustic",
"Humour","Speech","Chanson","Opera","Chamber Music","Sonata","Symphony",
"Booty Bass","Primus","Porn Groove","Satire","Slow Jam","Club","Tango","Samba",
"Folklore");
$version=Array("00"=>2.5, "10"=>2, "11"=>1);
$layer =Array("01"=>3, "10"=>2, "11"=>1);
$crc=Array("Yes", "No");
$bitrate["0001"]=Array(32,32,32,32,8,8);
$bitrate["0010"]=Array(64,48,40,48,16,16);
$bitrate["0011"]=Array(96,56,48,56,24,24);
$bitrate["0100"]=Array(128,64,56,64,32,32);
$bitrate["0101"]=Array(160,80,64,80,40,40);
$bitrate["0110"]=Array(192,96,80,96,48,48);
$bitrate["0111"]=Array(224,112,96,112,56,56);
$bitrate["1000"]=Array(256,128,112,128,64,64);
$bitrate["1001"]=Array(288,160,128,144,80,80);
$bitrate["1010"]=Array(320,192,160,160,96,96);
$bitrate["1011"]=Array(352,224,192,176,112,112);
$bitrate["1100"]=Array(384,256,224,192,128,128);
$bitrate["1101"]=Array(416,320,256,224,144,144);
$bitrate["1110"]=Array(448,384,320,256,160,160);
$bitindex=Array("1111"=>"0","1110"=>"1","1101"=>"2",
"1011"=>"3","1010"=>"4","1001"=>"5","0011"=>"3","0010"=>4,"0001"=>"5");
$freq["00"]=Array("11"=>44100,"10"=>22050,"00"=>11025);
$freq["01"]=Array("11"=>48000,"10"=>24000,"00"=>12000);
$freq["10"]=Array("11"=>32000,"10"=>16000,"00"=>8000);
$mode=Array("00"=>"Stereo","01"=>"Joint stereo","10"=>"Dual channel","11"=>"Mono");
$copy=Array("No","Yes");
// here goes the function
function mp3_id($file) {
global $version, $layer, $crc, $bitrate, $bitindex, $freq, $mode, $copy, $genres;
if(!$f=@fopen($file, "r")) { return -1; break; } else {
// read first 4 bytes from file and determine if it is wave file if so, header begins five bytes
// after word 'data'
$tmp=fread($f,4);
if($tmp=="RIFF") {
$idtag["ftype"]="Wave";
fseek($f, 0);
$tmp=fread($f,128);
$x=StrPos($tmp, "data");
fseek($f, $x+8);
$tmp=fread($f,4);
}
// now convert those four bytes to BIN. maybe it can be faster and easier. dunno how yet. help?
for($y=0;$y<4;$y++) {
$x=decbin(ord($tmp[$y]));
for($i=0;$i<(8-StrLen($x));$i++) {$x.="0";}
$bajt.=$x;
}
// every mp3 framesynch begins with eleven ones, lets look for it. if not found continue looking
// for some 1024 bytes (you can search multiple for it or you can disable this, it will speed up
// and not many mp3 are like this. anyways its not standart)
// if(substr($bajt,1,11)!="11111111111") {
// return -1;
// break;
// }
if(substr($bajt,1,11)!="11111111111") {
fseek($f, 4);
$tmp=fread($f,2048);
for($i=0;$i<2048;$i++){
if(ord($tmp[$i])==255 && substr(decbin(ord($tmp[$i+1])),0,3)=="111") {
$tmp=substr($tmp, $i,4);
$bajt="";
for($y=0;$y<4;$y++) {
$x=decbin(ord($tmp[$y]));
for($i=0;$i<(8-StrLen($x));$i++) {$x.="0";}
$bajt.=$x;
}
break;
}
}
}
if($bajt=="") {
return -1;
break;
}
// now parse all the info from frame header
$len=filesize($file);
$idtag["version"]=$version[substr($bajt,11,2)];
$idtag["layer"]=$layer[substr($bajt,13,2)];
$idtag["crc"]=$crc[$bajt[15]];
$idtag["bitrate"]=$bitrate[substr($bajt,16,4)][$bitindex[substr($bajt,11,4)]];
$idtag["frequency"]=$freq[substr($bajt,20,2)][substr($bajt,11,2)];
$idtag["padding"]=$copy[$bajt[22]];
$idtag["mode"]=$mode[substr($bajt,24,2)];
$idtag["copyright"]=$copy[$bajt[28]];
$idtag["original"]=$copy[$bajt[29]];
// lets count lenght of the song
if($idtag["layer"]==1) {
$fsize=(12*($idtag["bitrate"]*1000)/$idtag["frequency"]+$idtag["padding"])*4; }
else {
$fsize=144*(($idtag["bitrate"]*1000)/$idtag["frequency"]+$idtag["padding"]);}
$idtag["lenght"]=date("i:s",round($len/Round($fsize)/38.37));
// now lets see at the end of the file for id3 tag. if exists then parse it. if file doesnt have
// an id 3 tag if will return -1 in field 'tag' and if title is empty it returns file name.
if(!$len) $len=filesize($file);
fseek($f, $len-128);
$tag = fread($f, 128);
if(Substr($tag,0,3)=="TAG") {
$idtag["file"]=$file;
$idtag["tag"]=-1;
$idtag["title"]=Substr($tag,3,30);
$idtag["artist"]=Substr($tag,33,30);
$idtag["album"]=Substr($tag,63,30);
$idtag["year"]=Substr($tag,93,4);
$idtag["comment"]=Substr($tag,97,30);
$idtag["genreid"]=Ord(Substr($tag,127,1));
$idtag["genre"]=$genres[$idtag["genreid"]];
$idtag["filesize"]=$len;
} else {
$idtag["tag"]=0;
}
// close opened file and return results.
if(!$idtag["title"]) {
$idtag["title"]=Str_replace("\\","/", $file);
$idtag["title"]=substr($idtag["title"],strrpos($idtag["title"],"/")+1, 255);
}
fclose($f);
return $idtag;
}
}
// author: sejba@geocities.com
?>
