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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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Release: 2016-06-13 09:17:26
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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:

复制代码 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]
            );
  }
}
?>

希望本文所述对大家的php程序设计有所帮助。

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