Home > php教程 > php手册 > body text

php读取flash文件高宽帧数背景颜色的方法,

WBOY
Release: 2016-06-13 09:17:26
Original
1210 people have browsed it

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。

Related labels:
source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Recommendations
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template
About us Disclaimer Sitemap
php.cn:Public welfare online PHP training,Help PHP learners grow quickly!