note 71191 added to ref.id3
| From: | jbwalker at telus dot net | Date: | Wed, 15 Nov 2006 19:58:28 +0000 |
| Subject: | note 71191 added to ref.id3 | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-119757@lists.php.net to get a copy of this message | ||
Windows XP users may be having trouble with routines provided here and may (as above) only have
access to "read" classes. The following very simplified "write" can be used for
replacing Windows Media Player file tags, and with care and adjustments, can be used more generally.
define(_Title,"TIT2");
define(_Artist,"TPE1");
define(_Group,"TPE2");
define(_Album,"TALB");
define(_Genre,"TCON");
define(_TrackNo,"TRCK");
define(_Year,"TYER");
$frames = array(_Album=>"The Ultimate Experience",
_TrackNo=>"1",
_Title=>"All along the watchtower",
_Artist=>"Jimi Hendrix",
_Group=>"",
_Year=>"19xx",
_Genre=>"Rock");
#..........................................
# WRITE ID3 TAGS (Write MP3 [v1, v2]
#..........................................
function writeTags($mp3) {
$fl = file_get_contents($mp3);
$Header = substr($fl,0,10);
$tagLen = calcDecTagLen(substr($Header,6,4),$tagLen);
$music = substr($fl,$tagLen+10,-128);
# Can use input Header for output but you may
# wish to change the output filename for testing
file_put_contents($mp3,mkV2Tag($Header,$tagLen).$music.mkV1Tag());
}
# Create the V2 tag
function mkV2Tag($Hdr,$tagLen) {
Global $frames;
$null = chr(0);
$nl3 = $null.$null.$null; # 0 bytes for flags and encoding
$out = "";
foreach($frames as $ky=>$val) {
$n=strlen($val)+1;
$out.= $ky.mkFrmLen($n).$nl3.$val;
}
return $Hdr.str_pad($out,$tagLen,$null);
}
# Calculate Tag Length from bytes 6-10 of existing header
function calcDecTagLen($word) {
$m = 1;
$int = 0;
for ($i=strlen($word)-1;$i>-1;$i--) {
$int +=$m*ord($word[$i]);
$m=$m*128;
}
return $int;
}
# Make the 4 byte frame length value for the V2tag
function mkFrmLen($int) {
$hx = "";
while ($int>0) {
$n = $int % 256;
$hx = chr($n).$hx;
$int=floor($int/256);
}
return str_pad($hx,4,chr(0),STR_PAD_LEFT);
}
# Create the 128 byte V1 tag
function mkV1Tag() {
Global $frames;
$tagOut = "TAG".
adj($frames[_Title]).
adj($frames[_Artist]).
adj($frames[_Album]).
str_pad($frames[_Year],4).
str_pad(" ",29," ").
chr($frames[_TrackNo]).
chr($n);
return $tagOut;
}
# Pad the header to 30 characters
function adj($str) {
return substr(str_pad($str,30,chr(0)),0,30);
}
# This is a simple example for an mp3 in current folder
writeTags("01-Cognac Blues.mp3");
----
Server IP: 216.235.15.211
Probable Submitter: 207.81.127.107
----
Manual Page -- http://www.php.net/manual/en/ref.id3.php
Edit -- https://master.php.net/note/edit/71191
Del: integrated -- https://master.php.net/note/delete/71191/integrated
Del: useless -- https://master.php.net/note/delete/71191/useless
Del: bad code -- https://master.php.net/note/delete/71191/bad+code
Del: spam -- https://master.php.net/note/delete/71191/spam
Del: non-english -- https://master.php.net/note/delete/71191/non-english
Del: in docs -- https://master.php.net/note/delete/71191/in+docs
Del: other reasons-- https://master.php.net/note/delete/71191
Reject -- https://master.php.net/note/reject/71191
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