Initial commit

1 files changed, 909 insertions, 0 deletions

diff --git a/includes/getid3/module.audio-video.flv.php b/includes/getid3/module.audio-video.flv.php
new file mode 100644
index 0000000..7e68407
--- /dev/null
+++ b/includes/getid3/module.audio-video.flv.php
@@ -0,0 +1,909 @@
+<?php
+/////////////////////////////////////////////////////////////////
+/// getID3() by James Heinrich <info@getid3.org>               //
+//  available at https://github.com/JamesHeinrich/getID3       //
+//            or https://www.getid3.org                        //
+//            or http://getid3.sourceforge.net                 //
+//  see readme.txt for more details                            //
+/////////////////////////////////////////////////////////////////
+//                                                             //
+// module.audio-video.flv.php                                  //
+// module for analyzing Shockwave Flash Video files            //
+// dependencies: NONE                                          //
+//                                                             //
+/////////////////////////////////////////////////////////////////
+//                                                             //
+//  FLV module by Seth Kaufman <sethØwhirl-i-gig*com>          //
+//                                                             //
+//  * version 0.1 (26 June 2005)                               //
+//                                                             //
+//  * version 0.1.1 (15 July 2005)                             //
+//  minor modifications by James Heinrich <info@getid3.org>    //
+//                                                             //
+//  * version 0.2 (22 February 2006)                           //
+//  Support for On2 VP6 codec and meta information             //
+//    by Steve Webster <steve.websterØfeaturecreep*com>        //
+//                                                             //
+//  * version 0.3 (15 June 2006)                               //
+//  Modified to not read entire file into memory               //
+//    by James Heinrich <info@getid3.org>                      //
+//                                                             //
+//  * version 0.4 (07 December 2007)                           //
+//  Bugfixes for incorrectly parsed FLV dimensions             //
+//    and incorrect parsing of onMetaTag                       //
+//    by Evgeny Moysevich <moysevichØgmail*com>                //
+//                                                             //
+//  * version 0.5 (21 May 2009)                                //
+//  Fixed parsing of audio tags and added additional codec     //
+//    details. The duration is now read from onMetaTag (if     //
+//    exists), rather than parsing whole file                  //
+//    by Nigel Barnes <ngbarnesØhotmail*com>                   //
+//                                                             //
+//  * version 0.6 (24 May 2009)                                //
+//  Better parsing of files with h264 video                    //
+//    by Evgeny Moysevich <moysevichØgmail*com>                //
+//                                                             //
+//  * version 0.6.1 (30 May 2011)                              //
+//    prevent infinite loops in expGolombUe()                  //
+//                                                             //
+//  * version 0.7.0 (16 Jul 2013)                              //
+//  handle GETID3_FLV_VIDEO_VP6FLV_ALPHA                       //
+//  improved AVCSequenceParameterSetReader::readData()         //
+//    by Xander Schouwerwou <schouwerwouØgmail*com>            //
+//                                                            ///
+/////////////////////////////////////////////////////////////////
+
+if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers
+	exit;
+}
+
+define('GETID3_FLV_TAG_AUDIO',          8);
+define('GETID3_FLV_TAG_VIDEO',          9);
+define('GETID3_FLV_TAG_META',          18);
+
+define('GETID3_FLV_VIDEO_H263',         2);
+define('GETID3_FLV_VIDEO_SCREEN',       3);
+define('GETID3_FLV_VIDEO_VP6FLV',       4);
+define('GETID3_FLV_VIDEO_VP6FLV_ALPHA', 5);
+define('GETID3_FLV_VIDEO_SCREENV2',     6);
+define('GETID3_FLV_VIDEO_H264',         7);
+
+define('H264_AVC_SEQUENCE_HEADER',          0);
+define('H264_PROFILE_BASELINE',            66);
+define('H264_PROFILE_MAIN',                77);
+define('H264_PROFILE_EXTENDED',            88);
+define('H264_PROFILE_HIGH',               100);
+define('H264_PROFILE_HIGH10',             110);
+define('H264_PROFILE_HIGH422',            122);
+define('H264_PROFILE_HIGH444',            144);
+define('H264_PROFILE_HIGH444_PREDICTIVE', 244);
+
+class getid3_flv extends getid3_handler
+{
+	const magic = 'FLV';
+
+	/**
+	 * Break out of the loop if too many frames have been scanned; only scan this
+	 * many if meta frame does not contain useful duration.
+	 *
+	 * @var int
+	 */
+	public $max_frames = 100000;
+
+	/**
+	 * @return bool
+	 */
+	public function Analyze() {
+		$info = &$this->getid3->info;
+
+		$this->fseek($info['avdataoffset']);
+
+		$FLVdataLength = $info['avdataend'] - $info['avdataoffset'];
+		$FLVheader = $this->fread(5);
+
+		$info['fileformat'] = 'flv';
+		$info['flv']['header']['signature'] =                           substr($FLVheader, 0, 3);
+		$info['flv']['header']['version']   = getid3_lib::BigEndian2Int(substr($FLVheader, 3, 1));
+		$TypeFlags                          = getid3_lib::BigEndian2Int(substr($FLVheader, 4, 1));
+
+		if ($info['flv']['header']['signature'] != self::magic) {
+			$this->error('Expecting "'.getid3_lib::PrintHexBytes(self::magic).'" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes($info['flv']['header']['signature']).'"');
+			unset($info['flv'], $info['fileformat']);
+			return false;
+		}
+
+		$info['flv']['header']['hasAudio'] = (bool) ($TypeFlags & 0x04);
+		$info['flv']['header']['hasVideo'] = (bool) ($TypeFlags & 0x01);
+
+		$FrameSizeDataLength = getid3_lib::BigEndian2Int($this->fread(4));
+		$FLVheaderFrameLength = 9;
+		if ($FrameSizeDataLength > $FLVheaderFrameLength) {
+			$this->fseek($FrameSizeDataLength - $FLVheaderFrameLength, SEEK_CUR);
+		}
+		$Duration = 0;
+		$found_video = false;
+		$found_audio = false;
+		$found_meta  = false;
+		$found_valid_meta_playtime = false;
+		$tagParseCount = 0;
+		$info['flv']['framecount'] = array('total'=>0, 'audio'=>0, 'video'=>0);
+		$flv_framecount = &$info['flv']['framecount'];
+		while ((($this->ftell() + 16) < $info['avdataend']) && (($tagParseCount++ <= $this->max_frames) || !$found_valid_meta_playtime))  {
+			$ThisTagHeader = $this->fread(16);
+
+			$PreviousTagLength = getid3_lib::BigEndian2Int(substr($ThisTagHeader,  0, 4));
+			$TagType           = getid3_lib::BigEndian2Int(substr($ThisTagHeader,  4, 1));
+			$DataLength        = getid3_lib::BigEndian2Int(substr($ThisTagHeader,  5, 3));
+			$Timestamp         = getid3_lib::BigEndian2Int(substr($ThisTagHeader,  8, 3));
+			$LastHeaderByte    = getid3_lib::BigEndian2Int(substr($ThisTagHeader, 15, 1));
+			$NextOffset = $this->ftell() - 1 + $DataLength;
+			if ($Timestamp > $Duration) {
+				$Duration = $Timestamp;
+			}
+
+			$flv_framecount['total']++;
+			switch ($TagType) {
+				case GETID3_FLV_TAG_AUDIO:
+					$flv_framecount['audio']++;
+					if (!$found_audio) {
+						$found_audio = true;
+						$info['flv']['audio']['audioFormat']     = ($LastHeaderByte >> 4) & 0x0F;
+						$info['flv']['audio']['audioRate']       = ($LastHeaderByte >> 2) & 0x03;
+						$info['flv']['audio']['audioSampleSize'] = ($LastHeaderByte >> 1) & 0x01;
+						$info['flv']['audio']['audioType']       =  $LastHeaderByte       & 0x01;
+					}
+					break;
+
+				case GETID3_FLV_TAG_VIDEO:
+					$flv_framecount['video']++;
+					if (!$found_video) {
+						$found_video = true;
+						$info['flv']['video']['videoCodec'] = $LastHeaderByte & 0x07;
+
+						$FLVvideoHeader = $this->fread(11);
+
+						if ($info['flv']['video']['videoCodec'] == GETID3_FLV_VIDEO_H264) {
+							// this code block contributed by: moysevichØgmail*com
+
+							$AVCPacketType = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 0, 1));
+							if ($AVCPacketType == H264_AVC_SEQUENCE_HEADER) {
+								//	read AVCDecoderConfigurationRecord
+								$configurationVersion       = getid3_lib::BigEndian2Int(substr($FLVvideoHeader,  4, 1));
+								$AVCProfileIndication       = getid3_lib::BigEndian2Int(substr($FLVvideoHeader,  5, 1));
+								$profile_compatibility      = getid3_lib::BigEndian2Int(substr($FLVvideoHeader,  6, 1));
+								$lengthSizeMinusOne         = getid3_lib::BigEndian2Int(substr($FLVvideoHeader,  7, 1));
+								$numOfSequenceParameterSets = getid3_lib::BigEndian2Int(substr($FLVvideoHeader,  8, 1));
+
+								if (($numOfSequenceParameterSets & 0x1F) != 0) {
+									//	there is at least one SequenceParameterSet
+									//	read size of the first SequenceParameterSet
+									//$spsSize = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 9, 2));
+									$spsSize = getid3_lib::LittleEndian2Int(substr($FLVvideoHeader, 9, 2));
+									//	read the first SequenceParameterSet
+									$sps = $this->fread($spsSize);
+									if (strlen($sps) == $spsSize) {	//	make sure that whole SequenceParameterSet was red
+										$spsReader = new AVCSequenceParameterSetReader($sps);
+										$spsReader->readData();
+										$info['video']['resolution_x'] = $spsReader->getWidth();
+										$info['video']['resolution_y'] = $spsReader->getHeight();
+									}
+								}
+							}
+							// end: moysevichØgmail*com
+
+						} elseif ($info['flv']['video']['videoCodec'] == GETID3_FLV_VIDEO_H263) {
+
+							$PictureSizeType = (getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 3, 2))) >> 7;
+							$PictureSizeType = $PictureSizeType & 0x0007;
+							$info['flv']['header']['videoSizeType'] = $PictureSizeType;
+							switch ($PictureSizeType) {
+								case 0:
+									//$PictureSizeEnc = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 5, 2));
+									//$PictureSizeEnc <<= 1;
+									//$info['video']['resolution_x'] = ($PictureSizeEnc & 0xFF00) >> 8;
+									//$PictureSizeEnc = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 6, 2));
+									//$PictureSizeEnc <<= 1;
+									//$info['video']['resolution_y'] = ($PictureSizeEnc & 0xFF00) >> 8;
+
+									$PictureSizeEnc['x'] = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 4, 2)) >> 7;
+									$PictureSizeEnc['y'] = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 5, 2)) >> 7;
+									$info['video']['resolution_x'] = $PictureSizeEnc['x'] & 0xFF;
+									$info['video']['resolution_y'] = $PictureSizeEnc['y'] & 0xFF;
+									break;
+
+								case 1:
+									$PictureSizeEnc['x'] = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 4, 3)) >> 7;
+									$PictureSizeEnc['y'] = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 6, 3)) >> 7;
+									$info['video']['resolution_x'] = $PictureSizeEnc['x'] & 0xFFFF;
+									$info['video']['resolution_y'] = $PictureSizeEnc['y'] & 0xFFFF;
+									break;
+
+								case 2:
+									$info['video']['resolution_x'] = 352;
+									$info['video']['resolution_y'] = 288;
+									break;
+
+								case 3:
+									$info['video']['resolution_x'] = 176;
+									$info['video']['resolution_y'] = 144;
+									break;
+
+								case 4:
+									$info['video']['resolution_x'] = 128;
+									$info['video']['resolution_y'] = 96;
+									break;
+
+								case 5:
+									$info['video']['resolution_x'] = 320;
+									$info['video']['resolution_y'] = 240;
+									break;
+
+								case 6:
+									$info['video']['resolution_x'] = 160;
+									$info['video']['resolution_y'] = 120;
+									break;
+
+								default:
+									$info['video']['resolution_x'] = 0;
+									$info['video']['resolution_y'] = 0;
+									break;
+
+							}
+
+						} elseif ($info['flv']['video']['videoCodec'] ==  GETID3_FLV_VIDEO_VP6FLV_ALPHA) {
+
+							/* contributed by schouwerwouØgmail*com */
+							if (!isset($info['video']['resolution_x'])) { // only when meta data isn't set
+								$PictureSizeEnc['x'] = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 6, 2));
+								$PictureSizeEnc['y'] = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 7, 2));
+								$info['video']['resolution_x'] = ($PictureSizeEnc['x'] & 0xFF) << 3;
+								$info['video']['resolution_y'] = ($PictureSizeEnc['y'] & 0xFF) << 3;
+							}
+							/* end schouwerwouØgmail*com */
+
+						}
+						if (!empty($info['video']['resolution_x']) && !empty($info['video']['resolution_y'])) {
+							$info['video']['pixel_aspect_ratio'] = $info['video']['resolution_x'] / $info['video']['resolution_y'];
+						}
+					}
+					break;
+
+				// Meta tag
+				case GETID3_FLV_TAG_META:
+					if (!$found_meta) {
+						$found_meta = true;
+						$this->fseek(-1, SEEK_CUR);
+						$datachunk = $this->fread($DataLength);
+						$AMFstream = new AMFStream($datachunk);
+						$reader = new AMFReader($AMFstream);
+						$eventName = $reader->readData();
+						$info['flv']['meta'][$eventName] = $reader->readData();
+						unset($reader);
+
+						$copykeys = array('framerate'=>'frame_rate', 'width'=>'resolution_x', 'height'=>'resolution_y', 'audiodatarate'=>'bitrate', 'videodatarate'=>'bitrate');
+						foreach ($copykeys as $sourcekey => $destkey) {
+							if (isset($info['flv']['meta']['onMetaData'][$sourcekey])) {
+								switch ($sourcekey) {
+									case 'width':
+									case 'height':
+										$info['video'][$destkey] = intval(round($info['flv']['meta']['onMetaData'][$sourcekey]));
+										break;
+									case 'audiodatarate':
+										$info['audio'][$destkey] = getid3_lib::CastAsInt(round($info['flv']['meta']['onMetaData'][$sourcekey] * 1000));
+										break;
+									case 'videodatarate':
+									case 'frame_rate':
+									default:
+										$info['video'][$destkey] = $info['flv']['meta']['onMetaData'][$sourcekey];
+										break;
+								}
+							}
+						}
+						if (!empty($info['flv']['meta']['onMetaData']['duration'])) {
+							$found_valid_meta_playtime = true;
+						}
+					}
+					break;
+
+				default:
+					// noop
+					break;
+			}
+			$this->fseek($NextOffset);
+		}
+
+		$info['playtime_seconds'] = $Duration / 1000;
+		if ($info['playtime_seconds'] > 0) {
+			$info['bitrate'] = (($info['avdataend'] - $info['avdataoffset']) * 8) / $info['playtime_seconds'];
+		}
+
+		if ($info['flv']['header']['hasAudio']) {
+			$info['audio']['codec']           =   self::audioFormatLookup($info['flv']['audio']['audioFormat']);
+			$info['audio']['sample_rate']     =     self::audioRateLookup($info['flv']['audio']['audioRate']);
+			$info['audio']['bits_per_sample'] = self::audioBitDepthLookup($info['flv']['audio']['audioSampleSize']);
+
+			$info['audio']['channels']   =  $info['flv']['audio']['audioType'] + 1; // 0=mono,1=stereo
+			$info['audio']['lossless']   = ($info['flv']['audio']['audioFormat'] ? false : true); // 0=uncompressed
+			$info['audio']['dataformat'] = 'flv';
+		}
+		if (!empty($info['flv']['header']['hasVideo'])) {
+			$info['video']['codec']      = self::videoCodecLookup($info['flv']['video']['videoCodec']);
+			$info['video']['dataformat'] = 'flv';
+			$info['video']['lossless']   = false;
+		}
+
+		// Set information from meta
+		if (!empty($info['flv']['meta']['onMetaData']['duration'])) {
+			$info['playtime_seconds'] = $info['flv']['meta']['onMetaData']['duration'];
+			$info['bitrate'] = (($info['avdataend'] - $info['avdataoffset']) * 8) / $info['playtime_seconds'];
+		}
+		if (isset($info['flv']['meta']['onMetaData']['audiocodecid'])) {
+			$info['audio']['codec'] = self::audioFormatLookup($info['flv']['meta']['onMetaData']['audiocodecid']);
+		}
+		if (isset($info['flv']['meta']['onMetaData']['videocodecid'])) {
+			$info['video']['codec'] = self::videoCodecLookup($info['flv']['meta']['onMetaData']['videocodecid']);
+		}
+		return true;
+	}
+
+	/**
+	 * @param int $id
+	 *
+	 * @return string|false
+	 */
+	public static function audioFormatLookup($id) {
+		static $lookup = array(
+			0  => 'Linear PCM, platform endian',
+			1  => 'ADPCM',
+			2  => 'mp3',
+			3  => 'Linear PCM, little endian',
+			4  => 'Nellymoser 16kHz mono',
+			5  => 'Nellymoser 8kHz mono',
+			6  => 'Nellymoser',
+			7  => 'G.711A-law logarithmic PCM',
+			8  => 'G.711 mu-law logarithmic PCM',
+			9  => 'reserved',
+			10 => 'AAC',
+			11 => 'Speex',
+			12 => false, // unknown?
+			13 => false, // unknown?
+			14 => 'mp3 8kHz',
+			15 => 'Device-specific sound',
+		);
+		return (isset($lookup[$id]) ? $lookup[$id] : false);
+	}
+
+	/**
+	 * @param int $id
+	 *
+	 * @return int|false
+	 */
+	public static function audioRateLookup($id) {
+		static $lookup = array(
+			0 =>  5500,
+			1 => 11025,
+			2 => 22050,
+			3 => 44100,
+		);
+		return (isset($lookup[$id]) ? $lookup[$id] : false);
+	}
+
+	/**
+	 * @param int $id
+	 *
+	 * @return int|false
+	 */
+	public static function audioBitDepthLookup($id) {
+		static $lookup = array(
+			0 =>  8,
+			1 => 16,
+		);
+		return (isset($lookup[$id]) ? $lookup[$id] : false);
+	}
+
+	/**
+	 * @param int $id
+	 *
+	 * @return string|false
+	 */
+	public static function videoCodecLookup($id) {
+		static $lookup = array(
+			GETID3_FLV_VIDEO_H263         => 'Sorenson H.263',
+			GETID3_FLV_VIDEO_SCREEN       => 'Screen video',
+			GETID3_FLV_VIDEO_VP6FLV       => 'On2 VP6',
+			GETID3_FLV_VIDEO_VP6FLV_ALPHA => 'On2 VP6 with alpha channel',
+			GETID3_FLV_VIDEO_SCREENV2     => 'Screen video v2',
+			GETID3_FLV_VIDEO_H264         => 'Sorenson H.264',
+		);
+		return (isset($lookup[$id]) ? $lookup[$id] : false);
+	}
+}
+
+class AMFStream
+{
+	/**
+	 * @var string
+	 */
+	public $bytes;
+
+	/**
+	 * @var int
+	 */
+	public $pos;
+
+	/**
+	 * @param string $bytes
+	 */
+	public function __construct(&$bytes) {
+		$this->bytes =& $bytes;
+		$this->pos = 0;
+	}
+
+	/**
+	 * @return int
+	 */
+	public function readByte() { //  8-bit
+		return ord(substr($this->bytes, $this->pos++, 1));
+	}
+
+	/**
+	 * @return int
+	 */
+	public function readInt() { // 16-bit
+		return ($this->readByte() << 8) + $this->readByte();
+	}
+
+	/**
+	 * @return int
+	 */
+	public function readLong() { // 32-bit
+		return ($this->readByte() << 24) + ($this->readByte() << 16) + ($this->readByte() << 8) + $this->readByte();
+	}
+
+	/**
+	 * @return float|false
+	 */
+	public function readDouble() {
+		return getid3_lib::BigEndian2Float($this->read(8));
+	}
+
+	/**
+	 * @return string
+	 */
+	public function readUTF() {
+		$length = $this->readInt();
+		return $this->read($length);
+	}
+
+	/**
+	 * @return string
+	 */
+	public function readLongUTF() {
+		$length = $this->readLong();
+		return $this->read($length);
+	}
+
+	/**
+	 * @param int $length
+	 *
+	 * @return string
+	 */
+	public function read($length) {
+		$val = substr($this->bytes, $this->pos, $length);
+		$this->pos += $length;
+		return $val;
+	}
+
+	/**
+	 * @return int
+	 */
+	public function peekByte() {
+		$pos = $this->pos;
+		$val = $this->readByte();
+		$this->pos = $pos;
+		return $val;
+	}
+
+	/**
+	 * @return int
+	 */
+	public function peekInt() {
+		$pos = $this->pos;
+		$val = $this->readInt();
+		$this->pos = $pos;
+		return $val;
+	}
+
+	/**
+	 * @return int
+	 */
+	public function peekLong() {
+		$pos = $this->pos;
+		$val = $this->readLong();
+		$this->pos = $pos;
+		return $val;
+	}
+
+	/**
+	 * @return float|false
+	 */
+	public function peekDouble() {
+		$pos = $this->pos;
+		$val = $this->readDouble();
+		$this->pos = $pos;
+		return $val;
+	}
+
+	/**
+	 * @return string
+	 */
+	public function peekUTF() {
+		$pos = $this->pos;
+		$val = $this->readUTF();
+		$this->pos = $pos;
+		return $val;
+	}
+
+	/**
+	 * @return string
+	 */
+	public function peekLongUTF() {
+		$pos = $this->pos;
+		$val = $this->readLongUTF();
+		$this->pos = $pos;
+		return $val;
+	}
+}
+
+class AMFReader
+{
+	/**
+	* @var AMFStream
+	*/
+	public $stream;
+
+	/**
+	 * @param AMFStream $stream
+	 */
+	public function __construct(AMFStream $stream) {
+		$this->stream = $stream;
+	}
+
+	/**
+	 * @return mixed
+	 */
+	public function readData() {
+		$value = null;
+
+		$type = $this->stream->readByte();
+		switch ($type) {
+
+			// Double
+			case 0:
+				$value = $this->readDouble();
+			break;
+
+			// Boolean
+			case 1:
+				$value = $this->readBoolean();
+				break;
+
+			// String
+			case 2:
+				$value = $this->readString();
+				break;
+
+			// Object
+			case 3:
+				$value = $this->readObject();
+				break;
+
+			// null
+			case 6:
+				return null;
+
+			// Mixed array
+			case 8:
+				$value = $this->readMixedArray();
+				break;
+
+			// Array
+			case 10:
+				$value = $this->readArray();
+				break;
+
+			// Date
+			case 11:
+				$value = $this->readDate();
+				break;
+
+			// Long string
+			case 13:
+				$value = $this->readLongString();
+				break;
+
+			// XML (handled as string)
+			case 15:
+				$value = $this->readXML();
+				break;
+
+			// Typed object (handled as object)
+			case 16:
+				$value = $this->readTypedObject();
+				break;
+
+			// Long string
+			default:
+				$value = '(unknown or unsupported data type)';
+				break;
+		}
+
+		return $value;
+	}
+
+	/**
+	 * @return float|false
+	 */
+	public function readDouble() {
+		return $this->stream->readDouble();
+	}
+
+	/**
+	 * @return bool
+	 */
+	public function readBoolean() {
+		return $this->stream->readByte() == 1;
+	}
+
+	/**
+	 * @return string
+	 */
+	public function readString() {
+		return $this->stream->readUTF();
+	}
+
+	/**
+	 * @return array
+	 */
+	public function readObject() {
+		// Get highest numerical index - ignored
+//		$highestIndex = $this->stream->readLong();
+
+		$data = array();
+		$key = null;
+
+		while ($key = $this->stream->readUTF()) {
+			$data[$key] = $this->readData();
+		}
+		// Mixed array record ends with empty string (0x00 0x00) and 0x09
+		if (($key == '') && ($this->stream->peekByte() == 0x09)) {
+			// Consume byte
+			$this->stream->readByte();
+		}
+		return $data;
+	}
+
+	/**
+	 * @return array
+	 */
+	public function readMixedArray() {
+		// Get highest numerical index - ignored
+		$highestIndex = $this->stream->readLong();
+
+		$data = array();
+		$key = null;
+
+		while ($key = $this->stream->readUTF()) {
+			if (is_numeric($key)) {
+				$key = (int) $key;
+			}
+			$data[$key] = $this->readData();
+		}
+		// Mixed array record ends with empty string (0x00 0x00) and 0x09
+		if (($key == '') && ($this->stream->peekByte() == 0x09)) {
+			// Consume byte
+			$this->stream->readByte();
+		}
+
+		return $data;
+	}
+
+	/**
+	 * @return array
+	 */
+	public function readArray() {
+		$length = $this->stream->readLong();
+		$data = array();
+
+		for ($i = 0; $i < $length; $i++) {
+			$data[] = $this->readData();
+		}
+		return $data;
+	}
+
+	/**
+	 * @return float|false
+	 */
+	public function readDate() {
+		$timestamp = $this->stream->readDouble();
+		$timezone = $this->stream->readInt();
+		return $timestamp;
+	}
+
+	/**
+	 * @return string
+	 */
+	public function readLongString() {
+		return $this->stream->readLongUTF();
+	}
+
+	/**
+	 * @return string
+	 */
+	public function readXML() {
+		return $this->stream->readLongUTF();
+	}
+
+	/**
+	 * @return array
+	 */
+	public function readTypedObject() {
+		$className = $this->stream->readUTF();
+		return $this->readObject();
+	}
+}
+
+class AVCSequenceParameterSetReader
+{
+	/**
+	 * @var string
+	 */
+	public $sps;
+	public $start = 0;
+	public $currentBytes = 0;
+	public $currentBits = 0;
+
+	/**
+	 * @var int
+	 */
+	public $width;
+
+	/**
+	 * @var int
+	 */
+	public $height;
+
+	/**
+	 * @param string $sps
+	 */
+	public function __construct($sps) {
+		$this->sps = $sps;
+	}
+
+	public function readData() {
+		$this->skipBits(8);
+		$this->skipBits(8);
+		$profile = $this->getBits(8);                               // read profile
+		if ($profile > 0) {
+			$this->skipBits(8);
+			$level_idc = $this->getBits(8);                         // level_idc
+			$this->expGolombUe();                                   // seq_parameter_set_id // sps
+			$this->expGolombUe();                                   // log2_max_frame_num_minus4
+			$picOrderType = $this->expGolombUe();                   // pic_order_cnt_type
+			if ($picOrderType == 0) {
+				$this->expGolombUe();                               // log2_max_pic_order_cnt_lsb_minus4
+			} elseif ($picOrderType == 1) {
+				$this->skipBits(1);                                 // delta_pic_order_always_zero_flag
+				$this->expGolombSe();                               // offset_for_non_ref_pic
+				$this->expGolombSe();                               // offset_for_top_to_bottom_field
+				$num_ref_frames_in_pic_order_cnt_cycle = $this->expGolombUe(); // num_ref_frames_in_pic_order_cnt_cycle
+				for ($i = 0; $i < $num_ref_frames_in_pic_order_cnt_cycle; $i++) {
+					$this->expGolombSe();                           // offset_for_ref_frame[ i ]
+				}
+			}
+			$this->expGolombUe();                                   // num_ref_frames
+			$this->skipBits(1);                                     // gaps_in_frame_num_value_allowed_flag
+			$pic_width_in_mbs_minus1 = $this->expGolombUe();        // pic_width_in_mbs_minus1
+			$pic_height_in_map_units_minus1 = $this->expGolombUe(); // pic_height_in_map_units_minus1
+
+			$frame_mbs_only_flag = $this->getBits(1);               // frame_mbs_only_flag
+			if ($frame_mbs_only_flag == 0) {
+				$this->skipBits(1);                                 // mb_adaptive_frame_field_flag
+			}
+			$this->skipBits(1);                                     // direct_8x8_inference_flag
+			$frame_cropping_flag = $this->getBits(1);               // frame_cropping_flag
+
+			$frame_crop_left_offset   = 0;
+			$frame_crop_right_offset  = 0;
+			$frame_crop_top_offset    = 0;
+			$frame_crop_bottom_offset = 0;
+
+			if ($frame_cropping_flag) {
+				$frame_crop_left_offset   = $this->expGolombUe();   // frame_crop_left_offset
+				$frame_crop_right_offset  = $this->expGolombUe();   // frame_crop_right_offset
+				$frame_crop_top_offset    = $this->expGolombUe();   // frame_crop_top_offset
+				$frame_crop_bottom_offset = $this->expGolombUe();   // frame_crop_bottom_offset
+			}
+			$this->skipBits(1);                                     // vui_parameters_present_flag
+			// etc
+
+			$this->width  = (($pic_width_in_mbs_minus1 + 1) * 16) - ($frame_crop_left_offset * 2) - ($frame_crop_right_offset * 2);
+			$this->height = ((2 - $frame_mbs_only_flag) * ($pic_height_in_map_units_minus1 + 1) * 16) - ($frame_crop_top_offset * 2) - ($frame_crop_bottom_offset * 2);
+		}
+	}
+
+	/**
+	 * @param int $bits
+	 */
+	public function skipBits($bits) {
+		$newBits = $this->currentBits + $bits;
+		$this->currentBytes += (int)floor($newBits / 8);
+		$this->currentBits = $newBits % 8;
+	}
+
+	/**
+	 * @return int
+	 */
+	public function getBit() {
+		$result = (getid3_lib::BigEndian2Int(substr($this->sps, $this->currentBytes, 1)) >> (7 - $this->currentBits)) & 0x01;
+		$this->skipBits(1);
+		return $result;
+	}
+
+	/**
+	 * @param int $bits
+	 *
+	 * @return int
+	 */
+	public function getBits($bits) {
+		$result = 0;
+		for ($i = 0; $i < $bits; $i++) {
+			$result = ($result << 1) + $this->getBit();
+		}
+		return $result;
+	}
+
+	/**
+	 * @return int
+	 */
+	public function expGolombUe() {
+		$significantBits = 0;
+		$bit = $this->getBit();
+		while ($bit == 0) {
+			$significantBits++;
+			$bit = $this->getBit();
+
+			if ($significantBits > 31) {
+				// something is broken, this is an emergency escape to prevent infinite loops
+				return 0;
+			}
+		}
+		return (1 << $significantBits) + $this->getBits($significantBits) - 1;
+	}
+
+	/**
+	 * @return int
+	 */
+	public function expGolombSe() {
+		$result = $this->expGolombUe();
+		if (($result & 0x01) == 0) {
+			return -($result >> 1);
+		} else {
+			return ($result + 1) >> 1;
+		}
+	}
+
+	/**
+	 * @return int
+	 */
+	public function getWidth() {
+		return $this->width;
+	}
+
+	/**
+	 * @return int
+	 */
+	public function getHeight() {
+		return $this->height;
+	}
+}