module.graphic.pcd.php

一个用PHP编写的

<?php
/////////////////////////////////////////////////////////////////
/// getID3() by James Heinrich <[e-mail]>               //
//  available at http://getid3.sourceforge.net                 //
//            or http://www.getid3.org                         //
/////////////////////////////////////////////////////////////////
// See readme.txt for more details                             //
/////////////////////////////////////////////////////////////////
//                                                             //
// module.graphic.pcd.php                                      //
// module for analyzing PhotoCD (PCD) Image files              //
// dependencies: NONE                                          //
//                                                            ///
/////////////////////////////////////////////////////////////////


class getid3_pcd
{
	function getid3_pcd(&$fd, &$ThisFileInfo, $ExtractData=0) {
		$ThisFileInfo['fileformat']          = 'pcd';
		$ThisFileInfo['video']['dataformat'] = 'pcd';
		$ThisFileInfo['video']['lossless']   = false;


		fseek($fd, $ThisFileInfo['avdataoffset'] + 72, SEEK_SET);

		$PCDflags = fread($fd, 1);
		$PCDisVertical = ((ord($PCDflags) & 0x01) ? true : false);


		if ($PCDisVertical) {
			$ThisFileInfo['video']['resolution_x'] = 3072;
			$ThisFileInfo['video']['resolution_y'] = 2048;
		} else {
			$ThisFileInfo['video']['resolution_x'] = 2048;
			$ThisFileInfo['video']['resolution_y'] = 3072;
		}


		if ($ExtractData > 3) {

			$ThisFileInfo['error'][] = 'Cannot extract PSD image data for detail levels above BASE (3)';

		} elseif ($ExtractData > 0) {

			$PCD_levels[1] = array( 192,  128, 0x02000); // BASE/16
			$PCD_levels[2] = array( 384,  256, 0x0B800); // BASE/4
			$PCD_levels[3] = array( 768,  512, 0x30000); // BASE
			//$PCD_levels[4] = array(1536, 1024,    ??); // BASE*4  - encrypted with Kodak-proprietary compression/encryption
			//$PCD_levels[5] = array(3072, 2048,    ??); // BASE*16 - encrypted with Kodak-proprietary compression/encryption
			//$PCD_levels[6] = array(6144, 4096,    ??); // BASE*64 - encrypted with Kodak-proprietary compression/encryption; PhotoCD-Pro only

			list($PCD_width, $PCD_height, $PCD_dataOffset) = $PCD_levels[3];

			fseek($fd, $ThisFileInfo['avdataoffset'] + $PCD_dataOffset, SEEK_SET);

			for ($y = 0; $y < $PCD_height; $y += 2) {
				// The image-data of these subtypes start at the respective offsets of 02000h, 0b800h and 30000h.
				// To decode the YcbYr to the more usual RGB-code, three lines of data have to be read, each
				// consisting of 憌