getID3::analyze

Advertisement

Summery Summery

analyze file

Syntax Syntax

getID3::analyze( string $filename, int $filesize = null, string $original_filename = '',  $fp = null )

Parameters Parameters

$filename

(string) (Required)

$filesize

(int) (Optional)

Default value: null

$original_filename

(string) (Optional)

Default value: ''

Return Return

(array)

Source Source

File: wp-includes/ID3/getid3.php

		return false;
	}

	/**
	 * analyze file
	 *
	 * @param string   $filename
	 * @param int      $filesize
	 * @param string   $original_filename
	 * @param resource $fp
	 *
	 * @return array
	 */
	public function analyze($filename, $filesize=null, $original_filename='', $fp=null) {
		try {
			if (!$this->openfile($filename, $filesize, $fp)) {
				return $this->info;
			}

			// Handle tags
			foreach (array('id3v2'=>'id3v2', 'id3v1'=>'id3v1', 'apetag'=>'ape', 'lyrics3'=>'lyrics3') as $tag_name => $tag_key) {
				$option_tag = 'option_tag_'.$tag_name;
				if ($this->$option_tag) {
					$this->include_module('tag.'.$tag_name);
					try {
						$tag_class = 'getid3_'.$tag_name;
						$tag = new $tag_class($this);
						$tag->Analyze();
					}
					catch (getid3_exception $e) {
						throw $e;
					}
				}
			}
			if (isset($this->info['id3v2']['tag_offset_start'])) {
				$this->info['avdataoffset'] = max($this->info['avdataoffset'], $this->info['id3v2']['tag_offset_end']);
			}
			foreach (array('id3v1'=>'id3v1', 'apetag'=>'ape', 'lyrics3'=>'lyrics3') as $tag_name => $tag_key) {
				if (isset($this->info[$tag_key]['tag_offset_start'])) {
					$this->info['avdataend'] = min($this->info['avdataend'], $this->info[$tag_key]['tag_offset_start']);
				}
			}

			// ID3v2 detection (NOT parsing), even if ($this->option_tag_id3v2 == false) done to make fileformat easier
			if (!$this->option_tag_id3v2) {
				fseek($this->fp, 0);
				$header = fread($this->fp, 10);
				if ((substr($header, 0, 3) == 'ID3') && (strlen($header) == 10)) {
					$this->info['id3v2']['header']        = true;
					$this->info['id3v2']['majorversion']  = ord($header[3]);
					$this->info['id3v2']['minorversion']  = ord($header[4]);
					$this->info['avdataoffset']          += getid3_lib::BigEndian2Int(substr($header, 6, 4), 1) + 10; // length of ID3v2 tag in 10-byte header doesn't include 10-byte header length
				}
			}

			// read 32 kb file data
			fseek($this->fp, $this->info['avdataoffset']);
			$formattest = fread($this->fp, 32774);

			// determine format
			$determined_format = $this->GetFileFormat($formattest, ($original_filename ? $original_filename : $filename));

			// unable to determine file format
			if (!$determined_format) {
				fclose($this->fp);
				return $this->error('unable to determine file format');
			}

			// check for illegal ID3 tags
			if (isset($determined_format['fail_id3']) && (in_array('id3v1', $this->info['tags']) || in_array('id3v2', $this->info['tags']))) {
				if ($determined_format['fail_id3'] === 'ERROR') {
					fclose($this->fp);
					return $this->error('ID3 tags not allowed on this file type.');
				} elseif ($determined_format['fail_id3'] === 'WARNING') {
					$this->warning('ID3 tags not allowed on this file type.');
				}
			}

			// check for illegal APE tags
			if (isset($determined_format['fail_ape']) && in_array('ape', $this->info['tags'])) {
				if ($determined_format['fail_ape'] === 'ERROR') {
					fclose($this->fp);
					return $this->error('APE tags not allowed on this file type.');
				} elseif ($determined_format['fail_ape'] === 'WARNING') {
					$this->warning('APE tags not allowed on this file type.');
				}
			}

			// set mime type
			$this->info['mime_type'] = $determined_format['mime_type'];

			// supported format signature pattern detected, but module deleted
			if (!file_exists(GETID3_INCLUDEPATH.$determined_format['include'])) {
				fclose($this->fp);
				return $this->error('Format not supported, module "'.$determined_format['include'].'" was removed.');
			}

			// module requires mb_convert_encoding/iconv support
			// Check encoding/iconv support
			if (!empty($determined_format['iconv_req']) && !function_exists('mb_convert_encoding') && !function_exists('iconv') && !in_array($this->encoding, array('ISO-8859-1', 'UTF-8', 'UTF-16LE', 'UTF-16BE', 'UTF-16'))) {
				$errormessage = 'mb_convert_encoding() or iconv() support is required for this module ('.$determined_format['include'].') for encodings other than ISO-8859-1, UTF-8, UTF-16LE, UTF16-BE, UTF-16. ';
				if (GETID3_OS_ISWINDOWS) {
					$errormessage .= 'PHP does not have mb_convert_encoding() or iconv() support. Please enable php_mbstring.dll / php_iconv.dll in php.ini, and copy php_mbstring.dll / iconv.dll from c:/php/dlls to c:/windows/system32';
				} else {
					$errormessage .= 'PHP is not compiled with mb_convert_encoding() or iconv() support. Please recompile with the --enable-mbstring / --with-iconv switch';
				}
				return $this->error($errormessage);
			}

			// include module
			include_once(GETID3_INCLUDEPATH.$determined_format['include']);

			// instantiate module class
			$class_name = 'getid3_'.$determined_format['module'];
			if (!class_exists($class_name)) {
				return $this->error('Format not supported, module "'.$determined_format['include'].'" is corrupt.');
			}
			$class = new $class_name($this);
			$class->Analyze();
			unset($class);

			// close file
			fclose($this->fp);

			// process all tags - copy to 'tags' and convert charsets
			if ($this->option_tags_process) {
				$this->HandleAllTags();
			}

			// perform more calculations
			if ($this->option_extra_info) {
				$this->ChannelsBitratePlaytimeCalculations();
				$this->CalculateCompressionRatioVideo();
				$this->CalculateCompressionRatioAudio();
				$this->CalculateReplayGain();
				$this->ProcessAudioStreams();
			}

			// get the MD5 sum of the audio/video portion of the file - without ID3/APE/Lyrics3/etc header/footer tags
			if ($this->option_md5_data) {
				// do not calc md5_data if md5_data_source is present - set by flac only - future MPC/SV8 too
				if (!$this->option_md5_data_source || empty($this->info['md5_data_source'])) {
					$this->getHashdata('md5');
				}
			}

			// get the SHA1 sum of the audio/video portion of the file - without ID3/APE/Lyrics3/etc header/footer tags
			if ($this->option_sha1_data) {

Advertisement

Advertisement

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.