--- /dev/null
+<?php
+/////////////////////////////////////////////////////////////////
+/// getID3() by James Heinrich <info@getid3.org> //
+// available at http://getid3.sourceforge.net //
+// or http://www.getid3.org //
+// also https://github.com/JamesHeinrich/getID3 //
+/////////////////////////////////////////////////////////////////
+// See readme.txt for more details //
+/////////////////////////////////////////////////////////////////
+// //
+// module.graphic.pcd.php //
+// module for analyzing PhotoCD (PCD) Image files //
+// dependencies: NONE //
+// ///
+/////////////////////////////////////////////////////////////////
+
+
+class getid3_pcd extends getid3_handler
+{
+ public $ExtractData = 0;
+
+ public function Analyze() {
+ $info = &$this->getid3->info;
+
+ $info['fileformat'] = 'pcd';
+ $info['video']['dataformat'] = 'pcd';
+ $info['video']['lossless'] = false;
+
+
+ $this->fseek($info['avdataoffset'] + 72);
+
+ $PCDflags = $this->fread(1);
+ $PCDisVertical = ((ord($PCDflags) & 0x01) ? true : false);
+
+
+ if ($PCDisVertical) {
+ $info['video']['resolution_x'] = 3072;
+ $info['video']['resolution_y'] = 2048;
+ } else {
+ $info['video']['resolution_x'] = 2048;
+ $info['video']['resolution_y'] = 3072;
+ }
+
+
+ if ($this->ExtractData > 3) {
+
+ $this->error('Cannot extract PSD image data for detail levels above BASE (level-3) because encrypted with Kodak-proprietary compression/encryption.');
+
+ } elseif ($this->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];
+
+ $this->fseek($info['avdataoffset'] + $PCD_dataOffset);
+
+ for ($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 \91w\92 bytes, where \91w\92 is the width of the image-subtype. The first \91w\92 bytes and
+ // the first half of the third \91w\92 bytes contain data for the first RGB-line, the second \91w\92 bytes
+ // and the second half of the third \91w\92 bytes contain data for a second RGB-line.
+
+ $PCD_data_Y1 = $this->fread($PCD_width);
+ $PCD_data_Y2 = $this->fread($PCD_width);
+ $PCD_data_Cb = $this->fread(intval(round($PCD_width / 2)));
+ $PCD_data_Cr = $this->fread(intval(round($PCD_width / 2)));
+
+ for ($x = 0; $x < $PCD_width; $x++) {
+ if ($PCDisVertical) {
+ $info['pcd']['data'][$PCD_width - $x][$y] = $this->YCbCr2RGB(ord($PCD_data_Y1{$x}), ord($PCD_data_Cb{floor($x / 2)}), ord($PCD_data_Cr{floor($x / 2)}));
+ $info['pcd']['data'][$PCD_width - $x][$y + 1] = $this->YCbCr2RGB(ord($PCD_data_Y2{$x}), ord($PCD_data_Cb{floor($x / 2)}), ord($PCD_data_Cr{floor($x / 2)}));
+ } else {
+ $info['pcd']['data'][$y][$x] = $this->YCbCr2RGB(ord($PCD_data_Y1{$x}), ord($PCD_data_Cb{floor($x / 2)}), ord($PCD_data_Cr{floor($x / 2)}));
+ $info['pcd']['data'][$y + 1][$x] = $this->YCbCr2RGB(ord($PCD_data_Y2{$x}), ord($PCD_data_Cb{floor($x / 2)}), ord($PCD_data_Cr{floor($x / 2)}));
+ }
+ }
+ }
+
+ // Example for plotting extracted data
+ //getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio.ac3.php', __FILE__, true);
+ //if ($PCDisVertical) {
+ // $BMPinfo['resolution_x'] = $PCD_height;
+ // $BMPinfo['resolution_y'] = $PCD_width;
+ //} else {
+ // $BMPinfo['resolution_x'] = $PCD_width;
+ // $BMPinfo['resolution_y'] = $PCD_height;
+ //}
+ //$BMPinfo['bmp']['data'] = $info['pcd']['data'];
+ //getid3_bmp::PlotBMP($BMPinfo);
+ //exit;
+
+ }
+
+ }
+
+ public function YCbCr2RGB($Y, $Cb, $Cr) {
+ static $YCbCr_constants = array();
+ if (empty($YCbCr_constants)) {
+ $YCbCr_constants['red']['Y'] = 0.0054980 * 256;
+ $YCbCr_constants['red']['Cb'] = 0.0000000 * 256;
+ $YCbCr_constants['red']['Cr'] = 0.0051681 * 256;
+ $YCbCr_constants['green']['Y'] = 0.0054980 * 256;
+ $YCbCr_constants['green']['Cb'] = -0.0015446 * 256;
+ $YCbCr_constants['green']['Cr'] = -0.0026325 * 256;
+ $YCbCr_constants['blue']['Y'] = 0.0054980 * 256;
+ $YCbCr_constants['blue']['Cb'] = 0.0079533 * 256;
+ $YCbCr_constants['blue']['Cr'] = 0.0000000 * 256;
+ }
+
+ $RGBcolor = array('red'=>0, 'green'=>0, 'blue'=>0);
+ foreach ($RGBcolor as $rgbname => $dummy) {
+ $RGBcolor[$rgbname] = max(0,
+ min(255,
+ intval(
+ round(
+ ($YCbCr_constants[$rgbname]['Y'] * $Y) +
+ ($YCbCr_constants[$rgbname]['Cb'] * ($Cb - 156)) +
+ ($YCbCr_constants[$rgbname]['Cr'] * ($Cr - 137))
+ )
+ )
+ )
+ );
+ }
+ return (($RGBcolor['red'] * 65536) + ($RGBcolor['green'] * 256) + $RGBcolor['blue']);
+ }
+
+}
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