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php读取flash文件高宽帧数背景颜色的方法

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WBOYOriginal
2016-06-13 09:05:41948browse

php读取flash文件高宽帧数背景颜色的方法

   本文实例讲述了php读取flash文件高宽帧数背景颜色的方法。分享给大家供大家参考。

  具体实现方法如下:

  代码如下:

  /*

  示例:

  $file = '/data/ad_files/5/5.swf';

  $flash = new flash();

  $flash = $flash->getswfinfo($file);

  echo "

  文件的宽高是:".$flash["width"].":".$info["height"];

  echo "

  文件版本是".$flash["version"];

  echo "

  文件帧数量是".$flash["framecount"];

  echo "

  文件帧速率是".$flash["framerate"];

  echo "

  文件背景颜色是".$flash["bgcolor"];

  */

  class flash

  {

  //是否返回背景色

  public $need_back_color = false ;

  //是否返回版本

  public $need_version = false ;

  //是否返回帧速率

  public $need_framerate = false ;

  //是否返回帧数量

  public $need_framecount = false ;

  public function __construct()

  {

  }

  public function getswfinfo( $filename )

  {

  if ( file_exists($filename) ) {

  //echo "文件的修改时间:".date("m d y h:i:s.", filemtime($filename))."

  ";

  } else {

  //echo "目标文件不存在!";

  return array( "error" => $filename ) ;

  }

  //打开文件

  $rs = fopen($filename,"r");

  //读取文件的数据

  $str = fread( $rs , filesize( $filename ) ) ;

  ///

  if($str[0] == "f")

  {

  //echo "

  文件已是解压缩的文件:";

  } else {

  $first = substr($str,0,8);

  $last = substr($str,8);

  //

  $last = gzuncompress($last);

  //

  $str = $first . $last ;

  $str[0] = "f";

  //echo "

  解压缩后的文件信息:";

  }

  $info = $this->getinfo( $str );

  fclose ( $rs ) ;

  return $info;

  }

  private function mydecbin($str,$index)

  {

  $fbin = decbin(ord($str[$index]));

  while(strlen($fbin)

  return $fbin;

  }

  private function colorhex($data)

  {

  $tmp = dechex($data);

  if ( strlen($tmp)

  $tmp='0' . $tmp ;

  }

  return $tmp;

  }

  private function getinfo( $str )

  {

  //换算成二进制

  $fbin = $this->mydecbin( $str , 8 ) ;

  //计算rec的单位长度

  $slen = bindec( substr( $fbin , 0 , 5 ) );

  //计算rec所在的字节

  $recsize = $slen * 4 + 5 ;

  $recsize = ceil( $recsize / 8 ) ;

  //rec的二进制

  $recbin = $fbin ;

  for( $i = 9 ; $i

  {

  $recbin .= $this->mydecbin( $str ,$i );

  }

  //rec数据

  $rec = array();

  for( $i = 0 ; $i

  {

  $rec[] = bindec( substr( $recbin , 5 + $i * $slen , $slen ) ) / 20;

  }

  if ( $this->need_back_color ) {

  //背景颜色

  for( $i = $recsize + 12 ; $i

  {

  if ( ord( $str[$i] ) == 67 && ord( $str[$i+1] ) == 2 )

  {

  $bgcolor = $this->colorhex(ord($str[$i+2])).$this->colorhex(ord($str[$i+3])).$this->colorhex(ord($str[$i+4]));

  break;

  }

  }

  }

  if ( $this->need_version ) {

  //版本

  $version = ord( $str[3] );

  }

  if ( $this->need_framerate ) {

  //帧速率

  $framerate = ord( $str[$recsize + 8] ) / 256 + ord( $str[$recsize + 9] ) ;

  }

  if ( $this->need_framecount ) {

  //帧数量

  $framecount = ord( $str[$recsize + 11] ) * 256 + ord( $str[$recsize + 10] );

  }

  return array ( "bgcolor" => $bgcolor ,

  "version" => $version ,

  "framerate" => $framerate ,

  "framecount" => $framecount ,

  'width'=>$rec[1],

  'height'=>$rec[3]

  );

  }

  }

  ?>

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