php读取flash文件高宽帧数背景颜色代码_PHP教程

php教程读取flash文件高宽帧数背景颜色代码

/*
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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