+global\getid3_gif::Analyze()

Complexity

Conditions	15
Paths	361

Size

Total Lines

169

Duplication

Lines	6
Ratio	3.55 %

Importance

Changes

0

<?php
	public function Analyze() {
		$info = &$this->getid3->info;

		$info['fileformat']                  = 'gif';
		$info['video']['dataformat']         = 'gif';
		$info['video']['lossless']           = true;
		$info['video']['pixel_aspect_ratio'] = (float) 1;

		$this->fseek($info['avdataoffset']);
		$GIFheader = $this->fread(13);
		$offset = 0;

		$info['gif']['header']['raw']['identifier']            =                              substr($GIFheader, $offset, 3);
		$offset += 3;

		$magic = 'GIF';
		if ($info['gif']['header']['raw']['identifier'] != $magic) {

This code seems to be duplicated across your project.

			$this->error('Expecting "'.getid3_lib::PrintHexBytes($magic).'" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes($info['gif']['header']['raw']['identifier']).'"');
			unset($info['fileformat']);
			unset($info['gif']);
			return false;
		}

		//if (!$this->getid3->option_extra_info) {
		//	$this->warning('GIF Extensions and Global Color Table not returned due to !getid3->option_extra_info');
		//}

		$info['gif']['header']['raw']['version']               =                              substr($GIFheader, $offset, 3);
		$offset += 3;
		$info['gif']['header']['raw']['width']                 = getid3_lib::LittleEndian2Int(substr($GIFheader, $offset, 2));
		$offset += 2;
		$info['gif']['header']['raw']['height']                = getid3_lib::LittleEndian2Int(substr($GIFheader, $offset, 2));
		$offset += 2;
		$info['gif']['header']['raw']['flags']                 = getid3_lib::LittleEndian2Int(substr($GIFheader, $offset, 1));
		$offset += 1;
		$info['gif']['header']['raw']['bg_color_index']        = getid3_lib::LittleEndian2Int(substr($GIFheader, $offset, 1));
		$offset += 1;
		$info['gif']['header']['raw']['aspect_ratio']          = getid3_lib::LittleEndian2Int(substr($GIFheader, $offset, 1));
		$offset += 1;

		$info['video']['resolution_x']                         = $info['gif']['header']['raw']['width'];
		$info['video']['resolution_y']                         = $info['gif']['header']['raw']['height'];
		$info['gif']['version']                                = $info['gif']['header']['raw']['version'];
		$info['gif']['header']['flags']['global_color_table']  = (bool) ($info['gif']['header']['raw']['flags'] & 0x80);
		if ($info['gif']['header']['raw']['flags'] & 0x80) {
			// Number of bits per primary color available to the original image, minus 1
			$info['gif']['header']['bits_per_pixel']  = 3 * ((($info['gif']['header']['raw']['flags'] & 0x70) >> 4) + 1);
		} else {
			$info['gif']['header']['bits_per_pixel']  = 0;
		}
		$info['gif']['header']['flags']['global_color_sorted'] = (bool) ($info['gif']['header']['raw']['flags'] & 0x40);
		if ($info['gif']['header']['flags']['global_color_table']) {
			// the number of bytes contained in the Global Color Table. To determine that
			// actual size of the color table, raise 2 to [the value of the field + 1]
			$info['gif']['header']['global_color_size'] = pow(2, ($info['gif']['header']['raw']['flags'] & 0x07) + 1);
			$info['video']['bits_per_sample']           = ($info['gif']['header']['raw']['flags'] & 0x07) + 1;
		} else {
			$info['gif']['header']['global_color_size'] = 0;
		}
		if ($info['gif']['header']['raw']['aspect_ratio'] != 0) {
			// Aspect Ratio = (Pixel Aspect Ratio + 15) / 64
			$info['gif']['header']['aspect_ratio'] = ($info['gif']['header']['raw']['aspect_ratio'] + 15) / 64;
		}

		if ($info['gif']['header']['flags']['global_color_table']) {
			$GIFcolorTable = $this->fread(3 * $info['gif']['header']['global_color_size']);
			if ($this->getid3->option_extra_info) {
				$offset = 0;
				for ($i = 0; $i < $info['gif']['header']['global_color_size']; $i++) {
					$red   = getid3_lib::LittleEndian2Int(substr($GIFcolorTable, $offset++, 1));
					$green = getid3_lib::LittleEndian2Int(substr($GIFcolorTable, $offset++, 1));
					$blue  = getid3_lib::LittleEndian2Int(substr($GIFcolorTable, $offset++, 1));
					$info['gif']['global_color_table'][$i] = (($red << 16) | ($green << 8) | ($blue));
					$info['gif']['global_color_table_rgb'][$i] = sprintf('%02X%02X%02X', $red, $green, $blue);
				}
			}
		}

		// Image Descriptor
		$info['gif']['animation']['animated'] = false;
		while (!feof($this->getid3->fp)) {
			$NextBlockTest = $this->fread(1);
			switch ($NextBlockTest) {

/*
				case ',': // ',' - Image separator character
					$ImageDescriptorData = $NextBlockTest.$this->fread(9);
					$ImageDescriptor = array();
					$ImageDescriptor['image_left']   = getid3_lib::LittleEndian2Int(substr($ImageDescriptorData, 1, 2));
					$ImageDescriptor['image_top']    = getid3_lib::LittleEndian2Int(substr($ImageDescriptorData, 3, 2));
					$ImageDescriptor['image_width']  = getid3_lib::LittleEndian2Int(substr($ImageDescriptorData, 5, 2));
					$ImageDescriptor['image_height'] = getid3_lib::LittleEndian2Int(substr($ImageDescriptorData, 7, 2));
					$ImageDescriptor['flags_raw']    = getid3_lib::LittleEndian2Int(substr($ImageDescriptorData, 9, 1));
					$ImageDescriptor['flags']['use_local_color_map'] = (bool) ($ImageDescriptor['flags_raw'] & 0x80);
					$ImageDescriptor['flags']['image_interlaced']    = (bool) ($ImageDescriptor['flags_raw'] & 0x40);
					$info['gif']['image_descriptor'][] = $ImageDescriptor;

					if ($ImageDescriptor['flags']['use_local_color_map']) {

						$this->warning('This version of getID3() cannot parse local color maps for GIFs');
						return true;

					}
					$RasterData = array();
					$RasterData['code_size']        = getid3_lib::LittleEndian2Int($this->fread(1));
					$RasterData['block_byte_count'] = getid3_lib::LittleEndian2Int($this->fread(1));
					$info['gif']['raster_data'][count($info['gif']['image_descriptor']) - 1] = $RasterData;

					$CurrentCodeSize = $RasterData['code_size'] + 1;
					for ($i = 0; $i < pow(2, $RasterData['code_size']); $i++) {
						$DefaultDataLookupTable[$i] = chr($i);
					}
					$DefaultDataLookupTable[pow(2, $RasterData['code_size']) + 0] = ''; // Clear Code
					$DefaultDataLookupTable[pow(2, $RasterData['code_size']) + 1] = ''; // End Of Image Code

					$NextValue = $this->GetLSBits($CurrentCodeSize);
					echo 'Clear Code: '.$NextValue.'<BR>';

					$NextValue = $this->GetLSBits($CurrentCodeSize);
					echo 'First Color: '.$NextValue.'<BR>';

					$Prefix = $NextValue;
					$i = 0;
					while ($i++ < 20) {
						$NextValue = $this->GetLSBits($CurrentCodeSize);
						echo $NextValue.'<br>';
					}
					echo 'escaping<br>';
					return true;
					break;
*/

				case '!':
					// GIF Extension Block
					$ExtensionBlockData = $NextBlockTest.$this->fread(2);
					$ExtensionBlock = array();
					$ExtensionBlock['function_code']  = getid3_lib::LittleEndian2Int(substr($ExtensionBlockData, 1, 1));
					$ExtensionBlock['byte_length']    = getid3_lib::LittleEndian2Int(substr($ExtensionBlockData, 2, 1));
					$ExtensionBlock['data']           = (($ExtensionBlock['byte_length'] > 0) ? $this->fread($ExtensionBlock['byte_length']) : null);

It seems like $ExtensionBlock['byte_length'] can also be of type double or false; however, getid3_handler::fread() does only seem to accept integer, maybe add an additional type check?

					if (substr($ExtensionBlock['data'], 0, 11) == 'NETSCAPE2.0') { // Netscape Application Block (NAB)
						$ExtensionBlock['data'] .= $this->fread(4);
						if (substr($ExtensionBlock['data'], 11, 2) == "\x03\x01") {
							$info['gif']['animation']['animated']   = true;
							$info['gif']['animation']['loop_count'] = getid3_lib::LittleEndian2Int(substr($ExtensionBlock['data'], 13, 2));
						} else {
							$this->warning('Expecting 03 01 at offset '.($this->ftell() - 4).', found "'.getid3_lib::PrintHexBytes(substr($ExtensionBlock['data'], 11, 2)).'"');
						}
					}

					if ($this->getid3->option_extra_info) {
						$info['gif']['extension_blocks'][] = $ExtensionBlock;
					}
					break;

				case ';':
					$info['gif']['terminator_offset'] = $this->ftell() - 1;
					// GIF Terminator
					break;

				default:
					break;


			}
		}

		return true;
	}