New Jquery branch. Initial development version for istreamdev 1.0

1 files changed, 0 insertions, 519 deletions

diff --git a/getid3/module.graphic.png.php b/getid3/module.graphic.png.php
deleted file mode 100644
index b5b3d35..0000000
--- a/getid3/module.graphic.png.php
+++ /dev/null
@@ -1,519 +0,0 @@
-<?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.png.php                                      //
-// module for analyzing PNG Image files                        //
-// dependencies: NONE                                          //
-//                                                            ///
-/////////////////////////////////////////////////////////////////
-
-
-class getid3_png
-{
-
-	function getid3_png(&$fd, &$ThisFileInfo) {
-
-	    // shortcut
-	    $ThisFileInfo['png'] = array();
-	    $thisfile_png = &$ThisFileInfo['png'];
-
-		$ThisFileInfo['fileformat']          = 'png';
-		$ThisFileInfo['video']['dataformat'] = 'png';
-		$ThisFileInfo['video']['lossless']   = false;
-
-		fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET);
-		$PNGfiledata = fread($fd, GETID3_FREAD_BUFFER_SIZE);
-		$offset = 0;
-
-		$PNGidentifier = substr($PNGfiledata, $offset, 8); // $89 $50 $4E $47 $0D $0A $1A $0A
-		$offset += 8;
-
-		if ($PNGidentifier != "\x89\x50\x4E\x47\x0D\x0A\x1A\x0A") {
-			$ThisFileInfo['error'][] = 'First 8 bytes of file ('.getid3_lib::PrintHexBytes($PNGidentifier).') did not match expected PNG identifier';
-			unset($ThisFileInfo['fileformat']);
-			return false;
-		}
-
-		while (((ftell($fd) - (strlen($PNGfiledata) - $offset)) < $ThisFileInfo['filesize'])) {
-			$chunk['data_length'] = getid3_lib::BigEndian2Int(substr($PNGfiledata, $offset, 4));
-			$offset += 4;
-			while (((strlen($PNGfiledata) - $offset) < ($chunk['data_length'] + 4)) && (ftell($fd) < $ThisFileInfo['filesize'])) {
-				$PNGfiledata .= fread($fd, GETID3_FREAD_BUFFER_SIZE);
-			}
-			$chunk['type_text']   =               substr($PNGfiledata, $offset, 4);
-			$offset += 4;
-			$chunk['type_raw']    = getid3_lib::BigEndian2Int($chunk['type_text']);
-			$chunk['data']        =               substr($PNGfiledata, $offset, $chunk['data_length']);
-			$offset += $chunk['data_length'];
-			$chunk['crc']         = getid3_lib::BigEndian2Int(substr($PNGfiledata, $offset, 4));
-			$offset += 4;
-
-			$chunk['flags']['ancilliary']   = (bool) ($chunk['type_raw'] & 0x20000000);
-			$chunk['flags']['private']      = (bool) ($chunk['type_raw'] & 0x00200000);
-			$chunk['flags']['reserved']     = (bool) ($chunk['type_raw'] & 0x00002000);
-			$chunk['flags']['safe_to_copy'] = (bool) ($chunk['type_raw'] & 0x00000020);
-
-			// shortcut
-			$thisfile_png[$chunk['type_text']] = array();
-			$thisfile_png_chunk_type_text = &$thisfile_png[$chunk['type_text']];
-
-			switch ($chunk['type_text']) {
-
-				case 'IHDR': // Image Header
-					$thisfile_png_chunk_type_text['header'] = $chunk;
-					$thisfile_png_chunk_type_text['width']                     = getid3_lib::BigEndian2Int(substr($chunk['data'],  0, 4));
-					$thisfile_png_chunk_type_text['height']                    = getid3_lib::BigEndian2Int(substr($chunk['data'],  4, 4));
-					$thisfile_png_chunk_type_text['raw']['bit_depth']          = getid3_lib::BigEndian2Int(substr($chunk['data'],  8, 1));
-					$thisfile_png_chunk_type_text['raw']['color_type']         = getid3_lib::BigEndian2Int(substr($chunk['data'],  9, 1));
-					$thisfile_png_chunk_type_text['raw']['compression_method'] = getid3_lib::BigEndian2Int(substr($chunk['data'], 10, 1));
-					$thisfile_png_chunk_type_text['raw']['filter_method']      = getid3_lib::BigEndian2Int(substr($chunk['data'], 11, 1));
-					$thisfile_png_chunk_type_text['raw']['interlace_method']   = getid3_lib::BigEndian2Int(substr($chunk['data'], 12, 1));
-
-					$thisfile_png_chunk_type_text['compression_method_text']   = $this->PNGcompressionMethodLookup($thisfile_png_chunk_type_text['raw']['compression_method']);
-					$thisfile_png_chunk_type_text['color_type']['palette']     = (bool) ($thisfile_png_chunk_type_text['raw']['color_type'] & 0x01);
-					$thisfile_png_chunk_type_text['color_type']['true_color']  = (bool) ($thisfile_png_chunk_type_text['raw']['color_type'] & 0x02);
-					$thisfile_png_chunk_type_text['color_type']['alpha']       = (bool) ($thisfile_png_chunk_type_text['raw']['color_type'] & 0x04);
-
-					$ThisFileInfo['video']['resolution_x']    = $thisfile_png_chunk_type_text['width'];
-					$ThisFileInfo['video']['resolution_y']    = $thisfile_png_chunk_type_text['height'];
-
-					$ThisFileInfo['video']['bits_per_sample'] = $this->IHDRcalculateBitsPerSample($thisfile_png_chunk_type_text['raw']['color_type'], $thisfile_png_chunk_type_text['raw']['bit_depth']);
-					break;
-
-
-				case 'PLTE': // Palette
-					$thisfile_png_chunk_type_text['header'] = $chunk;
-					$paletteoffset = 0;
-					for ($i = 0; $i <= 255; $i++) {
-						//$thisfile_png_chunk_type_text['red'][$i]   = getid3_lib::BigEndian2Int(substr($chunk['data'], $paletteoffset++, 1));
-						//$thisfile_png_chunk_type_text['green'][$i] = getid3_lib::BigEndian2Int(substr($chunk['data'], $paletteoffset++, 1));
-						//$thisfile_png_chunk_type_text['blue'][$i]  = getid3_lib::BigEndian2Int(substr($chunk['data'], $paletteoffset++, 1));
-						$red   = getid3_lib::BigEndian2Int(substr($chunk['data'], $paletteoffset++, 1));
-						$green = getid3_lib::BigEndian2Int(substr($chunk['data'], $paletteoffset++, 1));
-						$blue  = getid3_lib::BigEndian2Int(substr($chunk['data'], $paletteoffset++, 1));
-						$thisfile_png_chunk_type_text[$i] = (($red << 16) | ($green << 8) | ($blue));
-					}
-					break;
-
-
-				case 'tRNS': // Transparency
-					$thisfile_png_chunk_type_text['header'] = $chunk;
-					switch ($thisfile_png['IHDR']['raw']['color_type']) {
-						case 0:
-							$thisfile_png_chunk_type_text['transparent_color_gray']  = getid3_lib::BigEndian2Int(substr($chunk['data'], 0, 2));
-							break;
-
-						case 2:
-							$thisfile_png_chunk_type_text['transparent_color_red']   = getid3_lib::BigEndian2Int(substr($chunk['data'], 0, 2));
-							$thisfile_png_chunk_type_text['transparent_color_green'] = getid3_lib::BigEndian2Int(substr($chunk['data'], 2, 2));
-							$thisfile_png_chunk_type_text['transparent_color_blue']  = getid3_lib::BigEndian2Int(substr($chunk['data'], 4, 2));
-							break;
-
-						case 3:
-							for ($i = 0; $i < strlen($chunk['data']); $i++) {
-								$thisfile_png_chunk_type_text['palette_opacity'][$i] = getid3_lib::BigEndian2Int(substr($chunk['data'], $i, 1));
-							}
-							break;
-
-						case 4:
-						case 6:
-							$ThisFileInfo['error'][] = 'Invalid color_type in tRNS chunk: '.$thisfile_png['IHDR']['raw']['color_type'];
-
-						default:
-							$ThisFileInfo['warning'][] = 'Unhandled color_type in tRNS chunk: '.$thisfile_png['IHDR']['raw']['color_type'];
-							break;
-					}
-					break;
-
-
-				case 'gAMA': // Image Gamma
-					$thisfile_png_chunk_type_text['header'] = $chunk;
-					$thisfile_png_chunk_type_text['gamma']  = getid3_lib::BigEndian2Int($chunk['data']) / 100000;
-					break;
-
-
-				case 'cHRM': // Primary Chromaticities
-					$thisfile_png_chunk_type_text['header']  = $chunk;
-					$thisfile_png_chunk_type_text['white_x'] = getid3_lib::BigEndian2Int(substr($chunk['data'],  0, 4)) / 100000;
-					$thisfile_png_chunk_type_text['white_y'] = getid3_lib::BigEndian2Int(substr($chunk['data'],  4, 4)) / 100000;
-					$thisfile_png_chunk_type_text['red_y']   = getid3_lib::BigEndian2Int(substr($chunk['data'],  8, 4)) / 100000;
-					$thisfile_png_chunk_type_text['red_y']   = getid3_lib::BigEndian2Int(substr($chunk['data'], 12, 4)) / 100000;
-					$thisfile_png_chunk_type_text['green_y'] = getid3_lib::BigEndian2Int(substr($chunk['data'], 16, 4)) / 100000;
-					$thisfile_png_chunk_type_text['green_y'] = getid3_lib::BigEndian2Int(substr($chunk['data'], 20, 4)) / 100000;
-					$thisfile_png_chunk_type_text['blue_y']  = getid3_lib::BigEndian2Int(substr($chunk['data'], 24, 4)) / 100000;
-					$thisfile_png_chunk_type_text['blue_y']  = getid3_lib::BigEndian2Int(substr($chunk['data'], 28, 4)) / 100000;
-					break;
-
-
-				case 'sRGB': // Standard RGB Color Space
-					$thisfile_png_chunk_type_text['header']                 = $chunk;
-					$thisfile_png_chunk_type_text['reindering_intent']      = getid3_lib::BigEndian2Int($chunk['data']);
-					$thisfile_png_chunk_type_text['reindering_intent_text'] = $this->PNGsRGBintentLookup($thisfile_png_chunk_type_text['reindering_intent']);
-					break;
-
-
-				case 'iCCP': // Embedded ICC Profile
-					$thisfile_png_chunk_type_text['header']                  = $chunk;
-					list($profilename, $compressiondata)                                 = explode("\x00", $chunk['data'], 2);
-					$thisfile_png_chunk_type_text['profile_name']            = $profilename;
-					$thisfile_png_chunk_type_text['compression_method']      = getid3_lib::BigEndian2Int(substr($compressiondata, 0, 1));
-					$thisfile_png_chunk_type_text['compression_profile']     = substr($compressiondata, 1);
-
-					$thisfile_png_chunk_type_text['compression_method_text'] = $this->PNGcompressionMethodLookup($thisfile_png_chunk_type_text['compression_method']);
-					break;
-
-
-				case 'tEXt': // Textual Data
-					$thisfile_png_chunk_type_text['header']  = $chunk;
-					list($keyword, $text)                                = explode("\x00", $chunk['data'], 2);
-					$thisfile_png_chunk_type_text['keyword'] = $keyword;
-					$thisfile_png_chunk_type_text['text']    = $text;
-
-					$thisfile_png['comments'][$thisfile_png_chunk_type_text['keyword']][] = $thisfile_png_chunk_type_text['text'];
-					break;
-
-
-				case 'zTXt': // Compressed Textual Data
-					$thisfile_png_chunk_type_text['header']                  = $chunk;
-					list($keyword, $otherdata)                                           = explode("\x00", $chunk['data'], 2);
-					$thisfile_png_chunk_type_text['keyword']                 = $keyword;
-					$thisfile_png_chunk_type_text['compression_method']      = getid3_lib::BigEndian2Int(substr($otherdata, 0, 1));
-					$thisfile_png_chunk_type_text['compressed_text']         = substr($otherdata, 1);
-					$thisfile_png_chunk_type_text['compression_method_text'] = $this->PNGcompressionMethodLookup($thisfile_png_chunk_type_text['compression_method']);
-					switch ($thisfile_png_chunk_type_text['compression_method']) {
-						case 0:
-							$thisfile_png_chunk_type_text['text']            = gzuncompress($thisfile_png_chunk_type_text['compressed_text']);
-							break;
-
-						default:
-							// unknown compression method
-							break;
-					}
-
-					if (isset($thisfile_png_chunk_type_text['text'])) {
-						$thisfile_png['comments'][$thisfile_png_chunk_type_text['keyword']][] = $thisfile_png_chunk_type_text['text'];
-					}
-					break;
-
-
-				case 'iTXt': // International Textual Data
-					$thisfile_png_chunk_type_text['header']                  = $chunk;
-					list($keyword, $otherdata)                                           = explode("\x00", $chunk['data'], 2);
-					$thisfile_png_chunk_type_text['keyword']                 = $keyword;
-					$thisfile_png_chunk_type_text['compression']             = (bool) getid3_lib::BigEndian2Int(substr($otherdata, 0, 1));
-					$thisfile_png_chunk_type_text['compression_method']      = getid3_lib::BigEndian2Int(substr($otherdata, 1, 1));
-					$thisfile_png_chunk_type_text['compression_method_text'] = $this->PNGcompressionMethodLookup($thisfile_png_chunk_type_text['compression_method']);
-					list($languagetag, $translatedkeyword, $text)                        = explode("\x00", substr($otherdata, 2), 3);
-					$thisfile_png_chunk_type_text['language_tag']            = $languagetag;
-					$thisfile_png_chunk_type_text['translated_keyword']      = $translatedkeyword;
-
-					if ($thisfile_png_chunk_type_text['compression']) {
-
-						switch ($thisfile_png_chunk_type_text['compression_method']) {
-							case 0:
-								$thisfile_png_chunk_type_text['text']        = gzuncompress($text);
-								break;
-
-							default:
-								// unknown compression method
-								break;
-						}
-
-					} else {
-
-						$thisfile_png_chunk_type_text['text']                = $text;
-
-					}
-
-					if (isset($thisfile_png_chunk_type_text['text'])) {
-						$thisfile_png['comments'][$thisfile_png_chunk_type_text['keyword']][] = $thisfile_png_chunk_type_text['text'];
-					}
-					break;
-
-
-				case 'bKGD': // Background Color
-					$thisfile_png_chunk_type_text['header']                   = $chunk;
-					switch ($thisfile_png['IHDR']['raw']['color_type']) {
-						case 0:
-						case 4:
-							$thisfile_png_chunk_type_text['background_gray']  = getid3_lib::BigEndian2Int($chunk['data']);
-							break;
-
-						case 2:
-						case 6:
-							$thisfile_png_chunk_type_text['background_red']   = getid3_lib::BigEndian2Int(substr($chunk['data'], 0 * $thisfile_png['IHDR']['raw']['bit_depth'], $thisfile_png['IHDR']['raw']['bit_depth']));
-							$thisfile_png_chunk_type_text['background_green'] = getid3_lib::BigEndian2Int(substr($chunk['data'], 1 * $thisfile_png['IHDR']['raw']['bit_depth'], $thisfile_png['IHDR']['raw']['bit_depth']));
-							$thisfile_png_chunk_type_text['background_blue']  = getid3_lib::BigEndian2Int(substr($chunk['data'], 2 * $thisfile_png['IHDR']['raw']['bit_depth'], $thisfile_png['IHDR']['raw']['bit_depth']));
-							break;
-
-						case 3:
-							$thisfile_png_chunk_type_text['background_index'] = getid3_lib::BigEndian2Int($chunk['data']);
-							break;
-
-						default:
-							break;
-					}
-					break;
-
-
-				case 'pHYs': // Physical Pixel Dimensions
-					$thisfile_png_chunk_type_text['header']                 = $chunk;
-					$thisfile_png_chunk_type_text['pixels_per_unit_x']      = getid3_lib::BigEndian2Int(substr($chunk['data'], 0, 4));
-					$thisfile_png_chunk_type_text['pixels_per_unit_y']      = getid3_lib::BigEndian2Int(substr($chunk['data'], 4, 4));
-					$thisfile_png_chunk_type_text['unit_specifier']         = getid3_lib::BigEndian2Int(substr($chunk['data'], 8, 1));
-					$thisfile_png_chunk_type_text['unit']                   = $this->PNGpHYsUnitLookup($thisfile_png_chunk_type_text['unit_specifier']);
-					break;
-
-
-				case 'sBIT': // Significant Bits
-					$thisfile_png_chunk_type_text['header'] = $chunk;
-					switch ($thisfile_png['IHDR']['raw']['color_type']) {
-						case 0:
-							$thisfile_png_chunk_type_text['significant_bits_gray']  = getid3_lib::BigEndian2Int(substr($chunk['data'], 0, 1));
-							break;
-
-						case 2:
-						case 3:
-							$thisfile_png_chunk_type_text['significant_bits_red']   = getid3_lib::BigEndian2Int(substr($chunk['data'], 0, 1));
-							$thisfile_png_chunk_type_text['significant_bits_green'] = getid3_lib::BigEndian2Int(substr($chunk['data'], 1, 1));
-							$thisfile_png_chunk_type_text['significant_bits_blue']  = getid3_lib::BigEndian2Int(substr($chunk['data'], 2, 1));
-							break;
-
-						case 4:
-							$thisfile_png_chunk_type_text['significant_bits_gray']  = getid3_lib::BigEndian2Int(substr($chunk['data'], 0, 1));
-							$thisfile_png_chunk_type_text['significant_bits_alpha'] = getid3_lib::BigEndian2Int(substr($chunk['data'], 1, 1));
-							break;
-
-						case 6:
-							$thisfile_png_chunk_type_text['significant_bits_red']   = getid3_lib::BigEndian2Int(substr($chunk['data'], 0, 1));
-							$thisfile_png_chunk_type_text['significant_bits_green'] = getid3_lib::BigEndian2Int(substr($chunk['data'], 1, 1));
-							$thisfile_png_chunk_type_text['significant_bits_blue']  = getid3_lib::BigEndian2Int(substr($chunk['data'], 2, 1));
-							$thisfile_png_chunk_type_text['significant_bits_alpha'] = getid3_lib::BigEndian2Int(substr($chunk['data'], 3, 1));
-							break;
-
-						default:
-							break;
-					}
-					break;
-
-
-				case 'sPLT': // Suggested Palette
-					$thisfile_png_chunk_type_text['header']                           = $chunk;
-					list($palettename, $otherdata)                                                = explode("\x00", $chunk['data'], 2);
-					$thisfile_png_chunk_type_text['palette_name']                     = $palettename;
-					$sPLToffset = 0;
-					$thisfile_png_chunk_type_text['sample_depth_bits']                = getid3_lib::BigEndian2Int(substr($otherdata, $sPLToffset, 1));
-					$sPLToffset += 1;
-					$thisfile_png_chunk_type_text['sample_depth_bytes']               = $thisfile_png_chunk_type_text['sample_depth_bits'] / 8;
-					$paletteCounter = 0;
-					while ($sPLToffset < strlen($otherdata)) {
-						$thisfile_png_chunk_type_text['red'][$paletteCounter]       = getid3_lib::BigEndian2Int(substr($otherdata, $sPLToffset, $thisfile_png_chunk_type_text['sample_depth_bytes']));
-						$sPLToffset += $thisfile_png_chunk_type_text['sample_depth_bytes'];
-						$thisfile_png_chunk_type_text['green'][$paletteCounter]     = getid3_lib::BigEndian2Int(substr($otherdata, $sPLToffset, $thisfile_png_chunk_type_text['sample_depth_bytes']));
-						$sPLToffset += $thisfile_png_chunk_type_text['sample_depth_bytes'];
-						$thisfile_png_chunk_type_text['blue'][$paletteCounter]      = getid3_lib::BigEndian2Int(substr($otherdata, $sPLToffset, $thisfile_png_chunk_type_text['sample_depth_bytes']));
-						$sPLToffset += $thisfile_png_chunk_type_text['sample_depth_bytes'];
-						$thisfile_png_chunk_type_text['alpha'][$paletteCounter]     = getid3_lib::BigEndian2Int(substr($otherdata, $sPLToffset, $thisfile_png_chunk_type_text['sample_depth_bytes']));
-						$sPLToffset += $thisfile_png_chunk_type_text['sample_depth_bytes'];
-						$thisfile_png_chunk_type_text['frequency'][$paletteCounter] = getid3_lib::BigEndian2Int(substr($otherdata, $sPLToffset, 2));
-						$sPLToffset += 2;
-						$paletteCounter++;
-					}
-					break;
-
-
-				case 'hIST': // Palette Histogram
-					$thisfile_png_chunk_type_text['header'] = $chunk;
-					$hISTcounter = 0;
-					while ($hISTcounter < strlen($chunk['data'])) {
-						$thisfile_png_chunk_type_text[$hISTcounter] = getid3_lib::BigEndian2Int(substr($chunk['data'], $hISTcounter / 2, 2));
-						$hISTcounter += 2;
-					}
-					break;
-
-
-				case 'tIME': // Image Last-Modification Time
-					$thisfile_png_chunk_type_text['header'] = $chunk;
-					$thisfile_png_chunk_type_text['year']   = getid3_lib::BigEndian2Int(substr($chunk['data'], 0, 2));
-					$thisfile_png_chunk_type_text['month']  = getid3_lib::BigEndian2Int(substr($chunk['data'], 2, 1));
-					$thisfile_png_chunk_type_text['day']    = getid3_lib::BigEndian2Int(substr($chunk['data'], 3, 1));
-					$thisfile_png_chunk_type_text['hour']   = getid3_lib::BigEndian2Int(substr($chunk['data'], 4, 1));
-					$thisfile_png_chunk_type_text['minute'] = getid3_lib::BigEndian2Int(substr($chunk['data'], 5, 1));
-					$thisfile_png_chunk_type_text['second'] = getid3_lib::BigEndian2Int(substr($chunk['data'], 6, 1));
-					$thisfile_png_chunk_type_text['unix']   = gmmktime($thisfile_png_chunk_type_text['hour'], $thisfile_png_chunk_type_text['minute'], $thisfile_png_chunk_type_text['second'], $thisfile_png_chunk_type_text['month'], $thisfile_png_chunk_type_text['day'], $thisfile_png_chunk_type_text['year']);
-					break;
-
-
-				case 'oFFs': // Image Offset
-					$thisfile_png_chunk_type_text['header']         = $chunk;
-					$thisfile_png_chunk_type_text['position_x']     = getid3_lib::BigEndian2Int(substr($chunk['data'], 0, 4), false, true);
-					$thisfile_png_chunk_type_text['position_y']     = getid3_lib::BigEndian2Int(substr($chunk['data'], 4, 4), false, true);
-					$thisfile_png_chunk_type_text['unit_specifier'] = getid3_lib::BigEndian2Int(substr($chunk['data'], 8, 1));
-					$thisfile_png_chunk_type_text['unit']           = $this->PNGoFFsUnitLookup($thisfile_png_chunk_type_text['unit_specifier']);
-					break;
-
-
-				case 'pCAL': // Calibration Of Pixel Values
-					$thisfile_png_chunk_type_text['header']             = $chunk;
-					list($calibrationname, $otherdata)                              = explode("\x00", $chunk['data'], 2);
-					$thisfile_png_chunk_type_text['calibration_name']   = $calibrationname;
-					$pCALoffset = 0;
-					$thisfile_png_chunk_type_text['original_zero']      = getid3_lib::BigEndian2Int(substr($chunk['data'], $pCALoffset, 4), false, true);
-					$pCALoffset += 4;
-					$thisfile_png_chunk_type_text['original_max']       = getid3_lib::BigEndian2Int(substr($chunk['data'], $pCALoffset, 4), false, true);
-					$pCALoffset += 4;
-					$thisfile_png_chunk_type_text['equation_type']      = getid3_lib::BigEndian2Int(substr($chunk['data'], $pCALoffset, 1));
-					$pCALoffset += 1;
-					$thisfile_png_chunk_type_text['equation_type_text'] = $this->PNGpCALequationTypeLookup($thisfile_png_chunk_type_text['equation_type']);
-					$thisfile_png_chunk_type_text['parameter_count']    = getid3_lib::BigEndian2Int(substr($chunk['data'], $pCALoffset, 1));
-					$pCALoffset += 1;
-					$thisfile_png_chunk_type_text['parameters']         = explode("\x00", substr($chunk['data'], $pCALoffset));
-					break;
-
-
-				case 'sCAL': // Physical Scale Of Image Subject
-					$thisfile_png_chunk_type_text['header']         = $chunk;
-					$thisfile_png_chunk_type_text['unit_specifier'] = getid3_lib::BigEndian2Int(substr($chunk['data'], 0, 1));
-					$thisfile_png_chunk_type_text['unit']           = $this->PNGsCALUnitLookup($thisfile_png_chunk_type_text['unit_specifier']);
-					list($pixelwidth, $pixelheight)                             = explode("\x00", substr($chunk['data'], 1));
-					$thisfile_png_chunk_type_text['pixel_width']    = $pixelwidth;
-					$thisfile_png_chunk_type_text['pixel_height']   = $pixelheight;
-					break;
-
-
-				case 'gIFg': // GIF Graphic Control Extension
-					$gIFgCounter = 0;
-					if (isset($thisfile_png_chunk_type_text) && is_array($thisfile_png_chunk_type_text)) {
-						$gIFgCounter = count($thisfile_png_chunk_type_text);
-					}
-					$thisfile_png_chunk_type_text[$gIFgCounter]['header']          = $chunk;
-					$thisfile_png_chunk_type_text[$gIFgCounter]['disposal_method'] = getid3_lib::BigEndian2Int(substr($chunk['data'], 0, 1));
-					$thisfile_png_chunk_type_text[$gIFgCounter]['user_input_flag'] = getid3_lib::BigEndian2Int(substr($chunk['data'], 1, 1));
-					$thisfile_png_chunk_type_text[$gIFgCounter]['delay_time']      = getid3_lib::BigEndian2Int(substr($chunk['data'], 2, 2));
-					break;
-
-
-				case 'gIFx': // GIF Application Extension
-					$gIFxCounter = 0;
-					if (isset($thisfile_png_chunk_type_text) && is_array($thisfile_png_chunk_type_text)) {
-						$gIFxCounter = count($thisfile_png_chunk_type_text);
-					}
-					$thisfile_png_chunk_type_text[$gIFxCounter]['header']                 = $chunk;
-					$thisfile_png_chunk_type_text[$gIFxCounter]['application_identifier'] = substr($chunk['data'],  0, 8);
-					$thisfile_png_chunk_type_text[$gIFxCounter]['authentication_code']    = substr($chunk['data'],  8, 3);
-					$thisfile_png_chunk_type_text[$gIFxCounter]['application_data']       = substr($chunk['data'], 11);
-					break;
-
-
-				case 'IDAT': // Image Data
-					$idatinformationfieldindex = 0;
-					if (isset($thisfile_png['IDAT']) && is_array($thisfile_png['IDAT'])) {
-						$idatinformationfieldindex = count($thisfile_png['IDAT']);
-					}
-					unset($chunk['data']);
-					$thisfile_png_chunk_type_text[$idatinformationfieldindex]['header'] = $chunk;
-					break;
-
-
-				case 'IEND': // Image Trailer
-					$thisfile_png_chunk_type_text['header'] = $chunk;
-					break;
-
-
-				default:
-					//unset($chunk['data']);
-					$thisfile_png_chunk_type_text['header'] = $chunk;
-					$ThisFileInfo['warning'][] = 'Unhandled chunk type: '.$chunk['type_text'];
-					break;
-			}
-		}
-
-		return true;
-	}
-
-	function PNGsRGBintentLookup($sRGB) {
-		static $PNGsRGBintentLookup = array(
-			0 => 'Perceptual',
-			1 => 'Relative colorimetric',
-			2 => 'Saturation',
-			3 => 'Absolute colorimetric'
-		);
-		return (isset($PNGsRGBintentLookup[$sRGB]) ? $PNGsRGBintentLookup[$sRGB] : 'invalid');
-	}
-
-	function PNGcompressionMethodLookup($compressionmethod) {
-		static $PNGcompressionMethodLookup = array(
-			0 => 'deflate/inflate'
-		);
-		return (isset($PNGcompressionMethodLookup[$compressionmethod]) ? $PNGcompressionMethodLookup[$compressionmethod] : 'invalid');
-	}
-
-	function PNGpHYsUnitLookup($unitid) {
-		static $PNGpHYsUnitLookup = array(
-			0 => 'unknown',
-			1 => 'meter'
-		);
-		return (isset($PNGpHYsUnitLookup[$unitid]) ? $PNGpHYsUnitLookup[$unitid] : 'invalid');
-	}
-
-	function PNGoFFsUnitLookup($unitid) {
-		static $PNGoFFsUnitLookup = array(
-			0 => 'pixel',
-			1 => 'micrometer'
-		);
-		return (isset($PNGoFFsUnitLookup[$unitid]) ? $PNGoFFsUnitLookup[$unitid] : 'invalid');
-	}
-
-	function PNGpCALequationTypeLookup($equationtype) {
-		static $PNGpCALequationTypeLookup = array(
-			0 => 'Linear mapping',
-			1 => 'Base-e exponential mapping',
-			2 => 'Arbitrary-base exponential mapping',
-			3 => 'Hyperbolic mapping'
-		);
-		return (isset($PNGpCALequationTypeLookup[$equationtype]) ? $PNGpCALequationTypeLookup[$equationtype] : 'invalid');
-	}
-
-	function PNGsCALUnitLookup($unitid) {
-		static $PNGsCALUnitLookup = array(
-			0 => 'meter',
-			1 => 'radian'
-		);
-		return (isset($PNGsCALUnitLookup[$unitid]) ? $PNGsCALUnitLookup[$unitid] : 'invalid');
-	}
-
-	function IHDRcalculateBitsPerSample($color_type, $bit_depth) {
-		switch ($color_type) {
-			case 0: // Each pixel is a grayscale sample.
-				return $bit_depth;
-				break;
-
-			case 2: // Each pixel is an R,G,B triple
-				return 3 * $bit_depth;
-				break;
-
-			case 3: // Each pixel is a palette index; a PLTE chunk must appear.
-				return $bit_depth;
-				break;
-
-			case 4: // Each pixel is a grayscale sample, followed by an alpha sample.
-				return 2 * $bit_depth;
-				break;
-
-			case 6: // Each pixel is an R,G,B triple, followed by an alpha sample.
-				return 4 * $bit_depth;
-				break;
-		}
-		return false;
-	}
-
-}
-
-
-?>
\ No newline at end of file