| <Website> | getID3 |  |
|
| Size: | 2976 |
| Storage flags: | strip |
<?php
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) {
$info['error'][] = 'Cannot extract PSD image data for detail levels above BASE (level-3) because encrypted with Kodak-proprietary compression/encryption.';
} elseif ($this->ExtractData > 0) {
$PCD_levels[1] = array( 192, 128, 0x02000);
$PCD_levels[2] = array( 384, 256, 0x0B800);
$PCD_levels[3] = array( 768, 512, 0x30000);
list($PCD_width, $PCD_height, $PCD_dataOffset) = $PCD_levels[3];
$this->fseek($info['avdataoffset'] + $PCD_dataOffset);
for ($y = 0; $y < $PCD_height; $y += 2) {
$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($x / 2)}));
}
}
}
}
}
public function YCbCr2RGB($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']);
}
}