<?php

require_once('BitStream.php');
require_once('FlashSWF/TagBlock.php');

class FlashSWF {
        private $_header = array();
        private $_movie_header = array();
    private $_block_list = array();
        function __construct() {
      return ;
    }
        function loadfile($filename) {
            $swfdata = file_get_contents($filename);
        if ($swfdata === FALSE) {
          // throw Exception("Can't open file($filename)");
                return FALSE;
        }
            $this->load($swfdata);
    }
        function load($swfdata) {
            $bs = new BitStream($swfdata);
        $magic = $bs->getStrings(3);
        $version = $bs->getByte();
        $filelength = $bs->getBytesLE(4);
                $this->_header['magic'] = $magic;
                $this->_header['version'] = $version;
        $this->_header['filelength'] = $filelength;
        if ($magic == 'FWS') {
                ;
        } elseif ($magic == 'CWS') {
                $movie_and_body = gzuncompress($bs->getStrings(), $filelength);
            $bs = new BitStream($movie_and_body);
        } else {
                return ;
        }
        $this->_movie_header = $this->get_movie_header($bs);
        while(true) {
          $block = FlashSWF_TagBlock::Factory($bs);
          $this->_block_list[] = $block;
          if ($block->getTagId() == 0) {
            break;
          }
        }
    }
    function get_movie_header(&$bs) {
      $movie_header = array();
      $movie_align = $bs->getBits(5);
      $movie_header['align'] = $movie_align;
      $movie_header['x_min'] = $bs->getBits($movie_align);
      $movie_header['x_max'] = $bs->getBits($movie_align);
      $movie_header['y_min'] = $bs->getBits($movie_align);
      $movie_header['y_max'] = $bs->getBits($movie_align);
      $bs->align();
      $movie_header['frame_rate_decimal'] = $bs->getByte();
      $movie_header['frame_rate_integer'] = $bs->getByte();
      $movie_header['frame_rate_count'] = $bs->getBytesLE(2);
      return $movie_header;
    }
        function savefile($filename) {
            $swfdata = $this->save();
        file_put_contents($filename, $swfdata);
    }
        function save() {
      /* header */
      $bs = new BitStream();
      $bs->putStrings($this->_header['magic']);
      $bs->putByte($this->_header['version']);
      $bs->putBytesLE($this->_header['filelength'], 4);
      $header = $bs->getData();
      /* movie header and body */
      $bs = new BitStream();
      $movie_header = $this->_movie_header;
      $movie_align = $movie_header['align'];
      $bs->putBits($movie_align, 5);
      $bs->putBits($movie_header['x_min'], $movie_align);
      $bs->putBits($movie_header['x_max'], $movie_align);
      $bs->putBits($movie_header['y_min'], $movie_align);
      $bs->putBits($movie_header['y_max'], $movie_align);
      $bs->flush();
      $bs->putByte($movie_header['frame_rate_decimal']);
      $bs->putByte($movie_header['frame_rate_integer']);
      $bs->putBytesLE($movie_header['frame_rate_count'], 2);
      $movie_and_body = $bs->getData();
      foreach($this->_block_list as $block) {
              $movie_and_body .=  $block->save();
      }
      return $header . $movie_and_body;
    }
    function dump() {
                var_dump($this->_header);
                var_dump($this->_movie_header);
        foreach ($this->_block_list as $block) {
                $block->dump();
        }
    }
}