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<?PHP // $Id$ //
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//-----------------------------------------------------------------------------
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// SWF HEADER - version 1.0
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// Small utility class to determine basic data from a SWF file header
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// Does not need any php-flash extension, based on raw binary data reading
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// This class is maintained at http://slainte.phpclasses.org/swfheader
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// This class got 2nd place on PHPCLASSES INNOVATION AWARD in May '04
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// Suggestion - Set TAB size to 2 for easy reading
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//-----------------------------------------------------------------------------
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// SWFHEADER CLASS - PHP SWF header parser
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// Copyright (C) 2004 Carlos Falo Herv?s
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// This library 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 GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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//-----------------------------------------------------------------------------
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class swfheader {
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var $debug ; // Output DEBUG info
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var $fname ; // SWF file analyzed
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var $magic ; // Magic in a SWF file (FWS or CWS)
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var $compressed ; // Flag to indicate a compressed file (CWS)
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var $version ; // Flash version
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var $size ; // Uncompressed file size (in bytes)
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var $width ; // Flash movie native width
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var $height ; // Flash movie native height
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var $valid ; // Valid SWF file
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var $fps ; // Flash movie native frame-rate
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var $frames ; // Flash movie total frames
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//---------------------------------------------------------------------------
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// swfheader($debug) : Constructor, basically does nothing but initilize
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// debug and data fields
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//---------------------------------------------------------------------------
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function swfheader($debug = false) {
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$this->debug = $debug ;
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$this->init() ;
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}
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//---------------------------------------------------------------------------
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// init() : initialize the data fields to "empty" values
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//---------------------------------------------------------------------------
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function init() {
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$this->valid = false ;
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$this->fname = "" ;
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$this->magic = "" ;
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$this->compressed = false ;
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$this->version = 0 ;
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$this->width = 0 ;
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$this->height = 0 ;
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$this->size = 0 ;
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$this->frames = 0 ;
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$this->fps[] = Array() ;
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if ($this->debug) echo "DEBUG: Data values initialized<br>" ;
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}
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//---------------------------------------------------------------------------
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// loadswf($filename) : loads $filename and stores data from it's header
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//---------------------------------------------------------------------------
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function loadswf($filename) {
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$this->fname = $filename ;
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$fp = @fopen($filename,"rb") ;
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if ($fp) {
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if ($this->debug) echo "DEBUG: Opened " . $this->fname . "<br>" ;
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// Read MAGIC FIELD
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$this->magic = fread($fp,3) ;
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if ($this->magic!="FWS" && $this->magic!="CWS") {
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if ($this->debug) echo "DEBUG: " . $this->fname . " is not a valid/supported SWF file<br>" ;
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$this->valid = 0 ;
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} else {
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// Compression
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if (substr($this->magic,0,1)=="C") $this->compressed = true ;
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else $this->compressed = false ;
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if ($this->debug) echo "DEBUG: Read MAGIC signature: " . $this->magic . "<br>" ;
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// Version
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$this->version = ord(fread($fp,1)) ;
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if ($this->debug) echo "DEBUG: Read VERSION: " . $this->version . "<br>" ;
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// Size
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$lg = 0 ;
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// 4 LSB-MSB
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for ($i=0;$i<4;$i++) {
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$t = ord(fread($fp,1)) ;
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if ($this->debug) echo "DEBUG: Partial SIZE read: " . ($t<<(8*$i)) . "<br>" ;
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$lg += ($t<<(8*$i)) ;
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}
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$this->size = $lg ;
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if ($this->debug) echo "DEBUG: Total SIZE: " . $this->size . "<br>" ;
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// RECT... we will "simulate" a stream from now on... read remaining file
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$buffer = fread($fp,$this->size) ;
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if ($this->compressed) {
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// First decompress GZ stream
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$buffer = gzuncompress($buffer,$this->size) ;
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}
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$b = ord(substr($buffer,0,1)) ;
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$buffer = substr($buffer,1) ;
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$cbyte = $b ;
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$bits = $b>>3 ;
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if ($this->debug) echo "DEBUG: RECT field size: " . $bits . " bits<br>" ;
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$cval = "" ;
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// Current byte
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$cbyte &= 7 ;
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$cbyte<<= 5 ;
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// Current bit (first byte starts off already shifted)
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$cbit = 2 ;
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// Must get all 4 values in the RECT
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for ($vals=0;$vals<4;$vals++) {
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$bitcount = 0 ;
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while ($bitcount<$bits) {
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if ($cbyte&128) {
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$cval .= "1" ;
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} else {
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$cval.="0" ;
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}
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$cbyte<<=1 ;
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$cbyte &= 255 ;
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$cbit-- ;
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$bitcount++ ;
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// We will be needing a new byte if we run out of bits
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if ($cbit<0) {
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$cbyte = ord(substr($buffer,0,1)) ;
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$buffer = substr($buffer,1) ;
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$cbit = 7 ;
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}
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}
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// O.k. full value stored... calculate
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$c = 1 ;
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$val = 0 ;
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// Reverse string to allow for SUM(2^n*$atom)
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if ($this->debug) echo "DEBUG: RECT binary value: " . $cval ;
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$tval = strrev($cval) ;
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for ($n=0;$n<strlen($tval);$n++) {
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$atom = substr($tval,$n,1) ;
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if ($atom=="1") $val+=$c ;
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// 2^n
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$c*=2 ;
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}
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// TWIPS to PIXELS
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$val/=20 ;
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if ($this->debug) echo " (" . $val . ")<br>" ;
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switch ($vals) {
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case 0:
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// tmp value
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$this->width = $val ;
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break ;
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case 1:
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$this->width = $val - $this->width ;
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break ;
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case 2:
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// tmp value
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$this->height = $val ;
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break ;
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case 3:
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$this->height = $val - $this->height ;
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break ;
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}
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$cval = "" ;
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}
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// Frame rate
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$this->fps = Array() ;
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for ($i=0;$i<2;$i++) {
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$t = ord(substr($buffer,0,1)) ;
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$buffer = substr($buffer,1) ;
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$this->fps[] = $t ;
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}
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if ($this->debug) echo "DEBUG: Frame rate: " . $this->fps[1] . "." . $this->fps[0] . "<br>" ;
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// Frames
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$this->frames = 0 ;
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for ($i=0;$i<2;$i++) {
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$t = ord(substr($buffer,0,1)) ;
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$buffer = substr($buffer,1) ;
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$this->frames += ($t<<(8*$i)) ;
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}
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if ($this->debug) echo "DEBUG: Frames: " . $this->frames . "<br>" ;
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fclose($fp) ;
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if ($this->debug) echo "DEBUG: Finished processing " . $this->fname . "<br>" ;
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$this->valid = 1 ;
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}
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} else {
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$this->valid = 0 ;
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if ($this->debug) echo "DEBUG: Failed to open " . $this->fname . "<br>" ;
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}
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return $this->valid ;
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}
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//---------------------------------------------------------------------------
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// show() : report to screen all the header info
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//---------------------------------------------------------------------------
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function show() {
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if ($this->valid) {
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// FNAME
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echo "<b>FILE: " . $this->fname . "</b><br>" ;
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// Magic
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echo "<b>MAGIC:</b> " . $this->magic ;
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if ($this->compressed) echo " (COMPRESSED)" ;
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echo "<br>" ;
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// Version
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echo "<b>VERSION:</b> " . $this->version . "<br>" ;
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// Size
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echo "<b>SIZE:</b> " . $this->size . " bytes <br>" ;
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// FRAMESIZE
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echo "<b>WIDHT:</B> " . $this->width . "<br>";
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echo "<b>HEIGHT:</B> " . $this->height . "<br>" ;
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// FPS
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echo "<b>FPS:</b> " . $this->fps[1] . "." . $this->fps[0] . " Frames/s <br>" ;
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// FRAMES
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echo "<b>FRAMES:</b> " . $this->frames . " FRAME <br>" ;
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} else {
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if (file_exists($this->fname))
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echo $this->fname . "is not a valid SWF file<br>" ;
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else
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if ($this->fname=="")
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echo "SWFHEADER->SHOW : No file loaded<br>" ;
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else
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echo "SWFHEDAR->SHOW : " . $this->fname . "was not found<br>" ;
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}
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}
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//---------------------------------------------------------------------------
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// display($trans) : just echo <OBJECT>/<EMBED> tags for the parsed file, if
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// trans is set, WMODE is set to transparent. Uses alwyas
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// Flash 7 player... can be tewaked to use exact versions
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//---------------------------------------------------------------------------
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function display($trans = false, $qlty = "high", $bgcolor = "#ffffff", $name = "") {
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$endl = chr(13) ;
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if ($this->valid) {
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if ($name=="") $name = substr($this->fname,0,strrpos($this->fname,".")) ;
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echo '<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=' . $this->version . ',0,0,0" width="' . $this->width . '" height="' . $this->height . '" id="' . $name . '" align="middle">' . $endl ;
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echo '<param name="allowScriptAccess" value="sameDomain" />' . $endl ;
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if ($trans) {
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echo '<param name="wmode" value="transparent" />' . $endl ;
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}
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echo '<param name="movie" value="' . $this->fname . '" />' . $endl ;
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echo '<param name="quality" value="' . $qlty . '" />' . $endl ;
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echo '<param name="bgcolor" value="' . $bgcolor .'" />' . $endl ;
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echo '<embed src="' . $this->fname . '" ';
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if ($trans) echo 'wmode="transparent" ' ;
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echo 'quality="' . $qlty . '" bgcolor="' . $bgcolor . '" width="' . $this->width . '" height="' . $this->height . '" name="' . $name . '" align="middle" allowScriptAccess="sameDomain" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" />' . $endl ;
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echo '</object>' . $endl ;
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} else {
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if ($this->debug) {
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if ($this->fname=="") {
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echo "SWFHEADER->DISPLAY : No loaded file in the object<br>" ;
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} else {
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if (file_exists($this->fname)) {
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echo "SWFHEADER->DISPLAY : " . $this->fname . " is not a valid SWF file<br>" ;
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} else {
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echo "SWFHEADER->DISPLAY : " . $this->fname . " was not found<br>" ;
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}
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}
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}
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}
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}
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}
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?>
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