getid3.php

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		// remove meaningless entries from unknown-format files
		if (empty($this->info['fileformat'])) {
			if (isset($this->info['avdataoffset'])) {
				unset($this->info['avdataoffset']);
			}
			if (isset($this->info['avdataend'])) {
				unset($this->info['avdataend']);
			}
		}
	}


	// return array containing information about all supported formats
	function GetFileFormatArray() {
		static $format_info = array();
		if (empty($format_info)) {
			$format_info = array(

				// Audio formats

				// AC-3   - audio      - Dolby AC-3 / Dolby Digital
				'ac3'  => array(
							'pattern'   => '^\x0B\x77',
							'group'     => 'audio',
							'module'    => 'ac3',
							'mime_type' => 'audio/ac3',
						  ),

				// AAC  - audio       - Advanced Audio Coding (AAC) - ADIF format
				'adif' => array(
							'pattern'   => '^ADIF',
							'group'     => 'audio',
							'module'    => 'aac',
							'option'    => 'adif',
							'mime_type' => 'application/octet-stream',
							'fail_ape'  => 'WARNING',
						  ),


				// AAC  - audio       - Advanced Audio Coding (AAC) - ADTS format (very similar to MP3)
				'adts' => array(
							'pattern'   => '^\xFF[\xF0-\xF1\xF8-\xF9]',
							'group'     => 'audio',
							'module'    => 'aac',
							'option'    => 'adts',
							'mime_type' => 'application/octet-stream',
							'fail_ape'  => 'WARNING',
						  ),


				// AU   - audio       - NeXT/Sun AUdio (AU)
				'au'   => array(
							'pattern'   => '^\.snd',
							'group'     => 'audio',
							'module'    => 'au',
							'mime_type' => 'audio/basic',
						  ),

				// AVR  - audio       - Audio Visual Research
				'avr'  => array(
							'pattern'   => '^2BIT',
							'group'     => 'audio',
							'module'    => 'avr',
							'mime_type' => 'application/octet-stream',
						  ),

				// BONK - audio       - Bonk v0.9+
				'bonk' => array(
							'pattern'   => '^\x00(BONK|INFO|META| ID3)',
							'group'     => 'audio',
							'module'    => 'bonk',
							'mime_type' => 'audio/xmms-bonk',
						  ),

				// FLAC - audio       - Free Lossless Audio Codec
				'flac' => array(
							'pattern'   => '^fLaC',
							'group'     => 'audio',
							'module'    => 'flac',
							'mime_type' => 'audio/x-flac',
						  ),

				// LA   - audio       - Lossless Audio (LA)
				'la'   => array(
							'pattern'   => '^LA0[2-4]',
							'group'     => 'audio',
							'module'    => 'la',
							'mime_type' => 'application/octet-stream',
						  ),

				// LPAC - audio       - Lossless Predictive Audio Compression (LPAC)
				'lpac' => array(
							'pattern'   => '^LPAC',
							'group'     => 'audio',
							'module'    => 'lpac',
							'mime_type' => 'application/octet-stream',
						  ),

				// MIDI - audio       - MIDI (Musical Instrument Digital Interface)
				'midi' => array(
							'pattern'   => '^MThd',
							'group'     => 'audio',
							'module'    => 'midi',
							'mime_type' => 'audio/midi',
						  ),

				// MAC  - audio       - Monkey's Audio Compressor
				'mac'  => array(
							'pattern'   => '^MAC ',
							'group'     => 'audio',
							'module'    => 'monkey',
							'mime_type' => 'application/octet-stream',
						  ),

				// MOD  - audio       - MODule (assorted sub-formats)
				'mod'  => array(
							'pattern'   => '^.{1080}(M.K.|[5-9]CHN|[1-3][0-9]CH)',
							'group'     => 'audio',
							'module'    => 'mod',
							'option'    => 'mod',
							'mime_type' => 'audio/mod',
						  ),

				// MOD  - audio       - MODule (Impulse Tracker)
				'it'   => array(
							'pattern'   => '^IMPM',
							'group'     => 'audio',
							'module'    => 'mod',
							'option'    => 'it',
							'mime_type' => 'audio/it',
						  ),

				// MOD  - audio       - MODule (eXtended Module, various sub-formats)
				'xm'   => array(
							'pattern'   => '^Extended Module',
							'group'     => 'audio',
							'module'    => 'mod',
							'option'    => 'xm',
							'mime_type' => 'audio/xm',
						  ),

				// MOD  - audio       - MODule (ScreamTracker)
				's3m'  => array(
							'pattern'   => '^.{44}SCRM',
							'group'     => 'audio',
							'module'    => 'mod',
							'option'    => 's3m',
							'mime_type' => 'audio/s3m',
						  ),

				// MPC  - audio       - Musepack / MPEGplus
				'mpc'  => array(
							'pattern'   => '^(MP\+|[\x00\x01\x10\x11\x40\x41\x50\x51\x80\x81\x90\x91\xC0\xC1\xD0\xD1][\x20-37][\x00\x20\x40\x60\x80\xA0\xC0\xE0])',
							'group'     => 'audio',
							'module'    => 'mpc',
							'mime_type' => 'application/octet-stream',
						  ),

				// MP3  - audio       - MPEG-audio Layer 3 (very similar to AAC-ADTS)
				'mp3'  => array(
							'pattern'   => '^\xFF[\xE2-\xE7\xF2-\xF7\xFA-\xFF][\x00-\xEB]',
							'group'     => 'audio',
							'module'    => 'mp3',
							'mime_type' => 'audio/mpeg',
						  ),

				// OFR  - audio       - OptimFROG
				'ofr'  => array(
							'pattern'   => '^(\*RIFF|OFR)',
							'group'     => 'audio',
							'module'    => 'optimfrog',
							'mime_type' => 'application/octet-stream',
						  ),

				// RKAU - audio       - RKive AUdio compressor
				'rkau' => array(
							'pattern'   => '^RKA',
							'group'     => 'audio',
							'module'    => 'rkau',
							'mime_type' => 'application/octet-stream',
						  ),

				// SHN  - audio       - Shorten
				'shn'  => array(
							'pattern'   => '^ajkg',
							'group'     => 'audio',
							'module'    => 'shorten',
							'mime_type' => 'audio/xmms-shn',
							'fail_id3'  => 'ERROR',
							'fail_ape'  => 'ERROR',
						  ),

				// TTA  - audio       - TTA Lossless Audio Compressor (http://tta.corecodec.org)
				'tta'  => array(
							'pattern'   => '^TTA',  // could also be '^TTA(\x01|\x02|\x03|2|1)'
							'group'     => 'audio',
							'module'    => 'tta',
							'mime_type' => 'application/octet-stream',
						  ),

				// VOC  - audio       - Creative Voice (VOC)
				'voc'  => array(
							'pattern'   => '^Creative Voice File',
							'group'     => 'audio',
							'module'    => 'voc',
							'mime_type' => 'audio/voc',
						  ),

				// VQF  - audio       - transform-domain weighted interleave Vector Quantization Format (VQF)
				'vqf'  => array(
							'pattern'   => '^TWIN',
							'group'     => 'audio',
							'module'    => 'vqf',
							'mime_type' => 'application/octet-stream',
						  ),


				// Audio-Video formats

				// ASF  - audio/video - Advanced Streaming Format, Windows Media Video, Windows Media Audio
				'asf'  => array(
							'pattern'   => '^\x30\x26\xB2\x75\x8E\x66\xCF\x11\xA6\xD9\x00\xAA\x00\x62\xCE\x6C',
							'group'     => 'audio-video',
							'module'    => 'asf',
							'mime_type' => 'video/x-ms-asf',
							'iconv_req' => false,
						  ),

				// BINK  - audio/video - Bink / Smacker
				'bink' => array(
							'pattern'   => '^(BIK|SMK)',
							'group'     => 'audio-video',
							'module'    => 'bink',
							'mime_type' => 'application/octet-stream',
						  ),

				// MKAV - audio/video - Mastroka
				'matroska' => array(
							'pattern'   => '^\x1A\x45\xDF\xA3',
							'group'     => 'audio-video',
							'module'    => 'matroska',
							'mime_type' => 'application/octet-stream',
						  ),

				// MPEG - audio/video - MPEG (Moving Pictures Experts Group)
				'mpeg' => array(
							'pattern'   => '^\x00\x00\x01(\xBA|\xB3)',
							'group'     => 'audio-video',
							'module'    => 'mpeg',
							'mime_type' => 'video/mpeg',
						  ),

				// NSV  - audio/video - Nullsoft Streaming Video (NSV)
				'nsv'  => array(
							'pattern'   => '^NSV[sf]',
							'group'     => 'audio-video',
							'module'    => 'nsv',
							'mime_type' => 'application/octet-stream',
						  ),

				// Ogg  - audio/video - Ogg (Ogg-Vorbis, Ogg-FLAC, Speex, Ogg-Theora(*), Ogg-Tarkin(*))
				'ogg'  => array(
							'pattern'   => '^OggS',
							'group'     => 'audio',
							'module'    => 'ogg',
							'mime_type' => 'application/ogg',
							'fail_id3'  => 'WARNING',
							'fail_ape'  => 'WARNING',
						  ),

				// QT   - audio/video - Quicktime
				'quicktime' => array(
							'pattern'   => '^.{4}(cmov|free|ftyp|mdat|moov|pnot|skip|wide)',
							'group'     => 'audio-video',
							'module'    => 'quicktime',
							'mime_type' => 'video/quicktime',
						  ),

				// RIFF - audio/video - Resource Interchange File Format (RIFF) / WAV / AVI / CD-audio / SDSS = renamed variant used by SmartSound QuickTracks (www.smartsound.com) / FORM = Audio Interchange File Format (AIFF)
				'riff' => array(
							'pattern'   => '^(RIFF|SDSS|FORM)',
							'group'     => 'audio-video',
							'module'    => 'riff',
							'mime_type' => 'audio/x-wave',
							'fail_ape'  => 'WARNING',
						  ),

				// Real - audio/video - RealAudio, RealVideo
				'real' => array(
							'pattern'   => '^(\.RMF|.ra)',
							'group'     => 'audio-video',
							'module'    => 'real',
							'mime_type' => 'audio/x-realaudio',
						  ),

				// SWF - audio/video - ShockWave Flash
				'swf' => array(
							'pattern'   => '^(F|C)WS',
							'group'     => 'audio-video',
							'module'    => 'swf',
							'mime_type' => 'application/x-shockwave-flash',
						  ),


				// Still-Image formats

				// BMP  - still image - Bitmap (Windows, OS/2; uncompressed, RLE8, RLE4)
				'bmp'  => array(
							'pattern'   => '^BM',
							'group'     => 'graphic',
							'module'    => 'bmp',
							'mime_type' => 'image/bmp',
							'fail_id3'  => 'ERROR',
							'fail_ape'  => 'ERROR',
						  ),

				// GIF  - still image - Graphics Interchange Format
				'gif'  => array(
							'pattern'   => '^GIF',
							'group'     => 'graphic',
							'module'    => 'gif',
							'mime_type' => 'image/gif',
							'fail_id3'  => 'ERROR',
							'fail_ape'  => 'ERROR',
						  ),

				// JPEG - still image - Joint Photographic Experts Group (JPEG)
				'jpg'  => array(
							'pattern'   => '^\xFF\xD8\xFF',
							'group'     => 'graphic',
							'module'    => 'jpg',
							'mime_type' => 'image/jpg',
							'fail_id3'  => 'ERROR',
							'fail_ape'  => 'ERROR',
						  ),

				// PCD  - still image - Kodak Photo CD
				'pcd'  => array(
							'pattern'   => '^.{2048}PCD_IPI\x00',
							'group'     => 'graphic',
							'module'    => 'pcd',
							'mime_type' => 'image/x-photo-cd',
							'fail_id3'  => 'ERROR',
							'fail_ape'  => 'ERROR',
						  ),


				// PNG  - still image - Portable Network Graphics (PNG)
				'png'  => array(
							'pattern'   => '^\x89\x50\x4E\x47\x0D\x0A\x1A\x0A',
							'group'     => 'graphic',
							'module'    => 'png',
							'mime_type' => 'image/png',
							'fail_id3'  => 'ERROR',
							'fail_ape'  => 'ERROR',
						  ),


				// TIFF  - still image - Tagged Information File Format (TIFF)
				'tiff' => array(
							'pattern'   => '^(II\x2A\x00|MM\x00\x2A)',
							'group'     => 'graphic',
							'module'    => 'tiff',
							'mime_type' => 'image/tiff',
							'fail_id3'  => 'ERROR',
							'fail_ape'  => 'ERROR',
						  ),


				// Data formats

				// EXE  - data        - EXEcutable program (EXE, COM)

				'exe'  => array(
							'pattern'   => '^MZ',
							'group'     => 'misc',
							'module'    => 'exe',
							'mime_type' => 'application/octet-stream',
							'fail_id3'  => 'ERROR',
							'fail_ape'  => 'ERROR',
						  ),


				// ISO  - data        - International Standards Organization (ISO) CD-ROM Image
				'iso'  => array(
							'pattern'   => '^.{32769}CD001',
							'group'     => 'misc',
							'module'    => 'iso',
							'mime_type' => 'application/octet-stream',
							'fail_id3'  => 'ERROR',
							'fail_ape'  => 'ERROR',
							'iconv_req' => false,
						  ),

				// RAR  - data        - RAR compressed data
				'rar'  => array(
							'pattern'   => '^Rar\!',
							'group'     => 'archive',
							'module'    => 'rar',
							'mime_type' => 'application/octet-stream',
							'fail_id3'  => 'ERROR',
							'fail_ape'  => 'ERROR',
						  ),

				// SZIP - audio       - SZIP compressed data
				'szip' => array(