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Diffstat (limited to 'getid3/module.graphic.pcd.php')
| -rw-r--r-- | getid3/module.graphic.pcd.php | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/getid3/module.graphic.pcd.php b/getid3/module.graphic.pcd.php new file mode 100644 index 0000000..60efabd --- /dev/null +++ b/getid3/module.graphic.pcd.php @@ -0,0 +1,130 @@ +<?php +///////////////////////////////////////////////////////////////// +/// getID3() by James Heinrich <info@getid3.org> // +// 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 ‘w’ bytes, where ‘w’ is the width of the image-subtype. The first ‘w’ bytes and + // the first half of the third ‘w’ bytes contain data for the first RGB-line, the second ‘w’ bytes + // and the second half of the third ‘w’ bytes contain data for a second RGB-line. + + $PCD_data_Y1 = fread($fd, $PCD_width); + $PCD_data_Y2 = fread($fd, $PCD_width); + $PCD_data_Cb = fread($fd, intval(round($PCD_width / 2))); + $PCD_data_Cr = fread($fd, intval(round($PCD_width / 2))); + + for ($x = 0; $x < $PCD_width; $x++) { + if ($PCDisVertical) { + $ThisFileInfo['pcd']['data'][$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)})); + $ThisFileInfo['pcd']['data'][$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 { + $ThisFileInfo['pcd']['data'][$y][$x] = $this->YCbCr2RGB(ord($PCD_data_Y1{$x}), ord($PCD_data_Cb{floor($x / 2)}), ord($PCD_data_Cr{floor($x / 2)})); + $ThisFileInfo['pcd']['data'][$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'] = $ThisFileInfo['pcd']['data']; + //getid3_bmp::PlotBMP($BMPinfo); + //exit; + + } + + } + + 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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