php读取flash文件高宽帧数背景颜色代码 |
时间:2015-01-23 来源:西部数据 作者:西部数据 |
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- <?php
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- class flash
- {
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- public $need_back_color = false ;
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- public $need_version = false ;
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- public $need_framerate = false ;
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- public $need_framecount = false ;
- public function __construct()
- {
- }
- public function getswfinfo( $filename )
- {
- if ( file_exists($filename) ) {
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- ";
- } else {
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- return array( "error" => $filename ) ;
- }
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- $rs = fopen($filename,"r");
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- $str = fread( $rs , filesize( $filename ) ) ;
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- if($str[0] == "f")
- {
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- 文件已是解压缩的文件:";
- } else {
- $first = substr($str,0,8);
- $last = substr($str,8);
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- $last = gzuncompress($last);
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- $str = $first . $last ;
- $str[0] = "f";
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- 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)<8)$fbin="0".$fbin;
- return $fbin;
- }
- private function colorhex($data)
- {
- $tmp = dechex($data);
- if ( strlen($tmp)<2 ) {
- $tmp='0' . $tmp ;
- }
- return $tmp;
- }
- private function getinfo( $str )
- {
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- $fbin = $this->mydecbin( $str , 8 ) ;
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- $slen = bindec( substr( $fbin , 0 , 5 ) );
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- $recsize = $slen * 4 + 5 ;
- $recsize = ceil( $recsize / 8 ) ;
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- $recbin = $fbin ;
- for( $i = 9 ; $i < $recsize + 8 ; $i++ )
- {
- $recbin .= $this->mydecbin( $str ,$i );
- }
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- $rec = array();
- for( $i = 0 ; $i < 4 ; $i++ )
- {
- $rec[] = bindec( substr( $recbin , 5 + $i * $slen , $slen ) ) / 20 ;
- }
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- if ( $this->need_back_color ) {
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- for( $i = $recsize + 12 ; $i < strlen ( $str ) ; $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;
- }
- }
- }
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- if ( $this->need_version ) {
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- $version = ord( $str[3] );
- }
- if ( $this->need_framerate ) {
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- $framerate = ord( $str[$recsize + 8] ) / 256 + ord( $str[$recsize + 9] ) ;
- }
- if ( $this->need_framecount ) {
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- $framecount = ord( $str[$recsize + 11] ) * 256 + ord( $str[$recsize + 10] );
- }
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- return array ( "bgcolor" => $bgcolor ,
- "version" => $version ,
- "framerate" => $framerate ,
- "framecount" => $framecount ,
- 'width'=>$rec[1],
- 'height'=>$rec[3]
- );
- }
- }
- ?>
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