Add TimedMediaHandler extension that allows display audio and video files in wiki pages, using the same syntax as for image files

1 files changed, 291 insertions, 0 deletions

diff --git a/extensions/TimedMediaHandler/libs/getid3/module.audio.dts.php b/extensions/TimedMediaHandler/libs/getid3/module.audio.dts.php
new file mode 100644
index 00000000..1c6b36f9
--- /dev/null
+++ b/extensions/TimedMediaHandler/libs/getid3/module.audio.dts.php
@@ -0,0 +1,291 @@
+<?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.audio.dts.php                                        //
+// module for analyzing DTS Audio files                        //
+// dependencies: NONE                                          //
+//                                                             //
+/////////////////////////////////////////////////////////////////
+
+
+/**
+* @tutorial http://wiki.multimedia.cx/index.php?title=DTS
+*/
+
+class getid3_dts extends getid3_handler
+{
+	/**
+	* Default DTS syncword used in native .cpt or .dts formats
+	*/
+	const syncword = "\x7F\xFE\x80\x01";
+
+	private $readBinDataOffset = 0;
+
+	/**
+	* Possible syncwords indicating bitstream encoding
+	*/
+	public static $syncwords = array(
+		0 => "\x7F\xFE\x80\x01",  // raw big-endian
+		1 => "\xFE\x7F\x01\x80",  // raw little-endian
+		2 => "\x1F\xFF\xE8\x00",  // 14-bit big-endian
+		3 => "\xFF\x1F\x00\xE8"); // 14-bit little-endian
+
+	public function Analyze() {
+		$info = &$this->getid3->info;
+		$info['fileformat'] = 'dts';
+
+		$this->fseek($info['avdataoffset']);
+		$DTSheader = $this->fread(20); // we only need 2 words magic + 6 words frame header, but these words may be normal 16-bit words OR 14-bit words with 2 highest bits set to zero, so 8 words can be either 8*16/8 = 16 bytes OR 8*16*(16/14)/8 = 18.3 bytes
+
+		// check syncword
+		$sync = substr($DTSheader, 0, 4);
+		if (($encoding = array_search($sync, self::$syncwords)) !== false) {
+
+			$info['dts']['raw']['magic'] = $sync;
+			$this->readBinDataOffset = 32;
+
+		} elseif ($this->isDependencyFor('matroska')) {
+
+			// Matroska contains DTS without syncword encoded as raw big-endian format
+			$encoding = 0;
+			$this->readBinDataOffset = 0;
+
+		} else {
+
+			unset($info['fileformat']);
+			return $this->error('Expecting "'.implode('| ', array_map('getid3_lib::PrintHexBytes', self::$syncwords)).'" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes($sync).'"');
+
+		}
+
+		// decode header
+		$fhBS = '';
+		for ($word_offset = 0; $word_offset <= strlen($DTSheader); $word_offset += 2) {
+			switch ($encoding) {
+				case 0: // raw big-endian
+					$fhBS .=        getid3_lib::BigEndian2Bin(       substr($DTSheader, $word_offset, 2) );
+					break;
+				case 1: // raw little-endian
+					$fhBS .=        getid3_lib::BigEndian2Bin(strrev(substr($DTSheader, $word_offset, 2)));
+					break;
+				case 2: // 14-bit big-endian
+					$fhBS .= substr(getid3_lib::BigEndian2Bin(       substr($DTSheader, $word_offset, 2) ), 2, 14);
+					break;
+				case 3: // 14-bit little-endian
+					$fhBS .= substr(getid3_lib::BigEndian2Bin(strrev(substr($DTSheader, $word_offset, 2))), 2, 14);
+					break;
+			}
+		}
+
+		$info['dts']['raw']['frame_type']             =        $this->readBinData($fhBS,  1);
+		$info['dts']['raw']['deficit_samples']        =        $this->readBinData($fhBS,  5);
+		$info['dts']['flags']['crc_present']          = (bool) $this->readBinData($fhBS,  1);
+		$info['dts']['raw']['pcm_sample_blocks']      =        $this->readBinData($fhBS,  7);
+		$info['dts']['raw']['frame_byte_size']        =        $this->readBinData($fhBS, 14);
+		$info['dts']['raw']['channel_arrangement']    =        $this->readBinData($fhBS,  6);
+		$info['dts']['raw']['sample_frequency']       =        $this->readBinData($fhBS,  4);
+		$info['dts']['raw']['bitrate']                =        $this->readBinData($fhBS,  5);
+		$info['dts']['flags']['embedded_downmix']     = (bool) $this->readBinData($fhBS,  1);
+		$info['dts']['flags']['dynamicrange']         = (bool) $this->readBinData($fhBS,  1);
+		$info['dts']['flags']['timestamp']            = (bool) $this->readBinData($fhBS,  1);
+		$info['dts']['flags']['auxdata']              = (bool) $this->readBinData($fhBS,  1);
+		$info['dts']['flags']['hdcd']                 = (bool) $this->readBinData($fhBS,  1);
+		$info['dts']['raw']['extension_audio']        =        $this->readBinData($fhBS,  3);
+		$info['dts']['flags']['extended_coding']      = (bool) $this->readBinData($fhBS,  1);
+		$info['dts']['flags']['audio_sync_insertion'] = (bool) $this->readBinData($fhBS,  1);
+		$info['dts']['raw']['lfe_effects']            =        $this->readBinData($fhBS,  2);
+		$info['dts']['flags']['predictor_history']    = (bool) $this->readBinData($fhBS,  1);
+		if ($info['dts']['flags']['crc_present']) {
+			$info['dts']['raw']['crc16']              =        $this->readBinData($fhBS, 16);
+		}
+		$info['dts']['flags']['mri_perfect_reconst']  = (bool) $this->readBinData($fhBS,  1);
+		$info['dts']['raw']['encoder_soft_version']   =        $this->readBinData($fhBS,  4);
+		$info['dts']['raw']['copy_history']           =        $this->readBinData($fhBS,  2);
+		$info['dts']['raw']['bits_per_sample']        =        $this->readBinData($fhBS,  2);
+		$info['dts']['flags']['surround_es']          = (bool) $this->readBinData($fhBS,  1);
+		$info['dts']['flags']['front_sum_diff']       = (bool) $this->readBinData($fhBS,  1);
+		$info['dts']['flags']['surround_sum_diff']    = (bool) $this->readBinData($fhBS,  1);
+		$info['dts']['raw']['dialog_normalization']   =        $this->readBinData($fhBS,  4);
+
+
+		$info['dts']['bitrate']              = self::bitrateLookup($info['dts']['raw']['bitrate']);
+		$info['dts']['bits_per_sample']      = self::bitPerSampleLookup($info['dts']['raw']['bits_per_sample']);
+		$info['dts']['sample_rate']          = self::sampleRateLookup($info['dts']['raw']['sample_frequency']);
+		$info['dts']['dialog_normalization'] = self::dialogNormalization($info['dts']['raw']['dialog_normalization'], $info['dts']['raw']['encoder_soft_version']);
+		$info['dts']['flags']['lossless']    = (($info['dts']['raw']['bitrate'] == 31) ? true  : false);
+		$info['dts']['bitrate_mode']         = (($info['dts']['raw']['bitrate'] == 30) ? 'vbr' : 'cbr');
+		$info['dts']['channels']             = self::numChannelsLookup($info['dts']['raw']['channel_arrangement']);
+		$info['dts']['channel_arrangement']  = self::channelArrangementLookup($info['dts']['raw']['channel_arrangement']);
+
+		$info['audio']['dataformat']          = 'dts';
+		$info['audio']['lossless']            = $info['dts']['flags']['lossless'];
+		$info['audio']['bitrate_mode']        = $info['dts']['bitrate_mode'];
+		$info['audio']['bits_per_sample']     = $info['dts']['bits_per_sample'];
+		$info['audio']['sample_rate']         = $info['dts']['sample_rate'];
+		$info['audio']['channels']            = $info['dts']['channels'];
+		$info['audio']['bitrate']             = $info['dts']['bitrate'];
+		if (isset($info['avdataend']) && !empty($info['dts']['bitrate']) && is_numeric($info['dts']['bitrate'])) {
+			$info['playtime_seconds']         = ($info['avdataend'] - $info['avdataoffset']) / ($info['dts']['bitrate'] / 8);
+			if (($encoding == 2) || ($encoding == 3)) {
+				// 14-bit data packed into 16-bit words, so the playtime is wrong because only (14/16) of the bytes in the data portion of the file are used at the specified bitrate
+				$info['playtime_seconds'] *= (14 / 16);
+			}
+		}
+		return true;
+	}
+
+	private function readBinData($bin, $length) {
+		$data = substr($bin, $this->readBinDataOffset, $length);
+		$this->readBinDataOffset += $length;
+
+		return bindec($data);
+	}
+
+	public static function bitrateLookup($index) {
+		static $lookup = array(
+			0  => 32000,
+			1  => 56000,
+			2  => 64000,
+			3  => 96000,
+			4  => 112000,
+			5  => 128000,
+			6  => 192000,
+			7  => 224000,
+			8  => 256000,
+			9  => 320000,
+			10 => 384000,
+			11 => 448000,
+			12 => 512000,
+			13 => 576000,
+			14 => 640000,
+			15 => 768000,
+			16 => 960000,
+			17 => 1024000,
+			18 => 1152000,
+			19 => 1280000,
+			20 => 1344000,
+			21 => 1408000,
+			22 => 1411200,
+			23 => 1472000,
+			24 => 1536000,
+			25 => 1920000,
+			26 => 2048000,
+			27 => 3072000,
+			28 => 3840000,
+			29 => 'open',
+			30 => 'variable',
+			31 => 'lossless',
+		);
+		return (isset($lookup[$index]) ? $lookup[$index] : false);
+	}
+
+	public static function sampleRateLookup($index) {
+		static $lookup = array(
+			0  => 'invalid',
+			1  => 8000,
+			2  => 16000,
+			3  => 32000,
+			4  => 'invalid',
+			5  => 'invalid',
+			6  => 11025,
+			7  => 22050,
+			8  => 44100,
+			9  => 'invalid',
+			10 => 'invalid',
+			11 => 12000,
+			12 => 24000,
+			13 => 48000,
+			14 => 'invalid',
+			15 => 'invalid',
+		);
+		return (isset($lookup[$index]) ? $lookup[$index] : false);
+	}
+
+	public static function bitPerSampleLookup($index) {
+		static $lookup = array(
+			0  => 16,
+			1  => 20,
+			2  => 24,
+			3  => 24,
+		);
+		return (isset($lookup[$index]) ? $lookup[$index] : false);
+	}
+
+	public static function numChannelsLookup($index) {
+		switch ($index) {
+			case 0:
+				return 1;
+				break;
+			case 1:
+			case 2:
+			case 3:
+			case 4:
+				return 2;
+				break;
+			case 5:
+			case 6:
+				return 3;
+				break;
+			case 7:
+			case 8:
+				return 4;
+				break;
+			case 9:
+				return 5;
+				break;
+			case 10:
+			case 11:
+			case 12:
+				return 6;
+				break;
+			case 13:
+				return 7;
+				break;
+			case 14:
+			case 15:
+				return 8;
+				break;
+		}
+		return false;
+	}
+
+	public static function channelArrangementLookup($index) {
+		static $lookup = array(
+			0  => 'A',
+			1  => 'A + B (dual mono)',
+			2  => 'L + R (stereo)',
+			3  => '(L+R) + (L-R) (sum-difference)',
+			4  => 'LT + RT (left and right total)',
+			5  => 'C + L + R',
+			6  => 'L + R + S',
+			7  => 'C + L + R + S',
+			8  => 'L + R + SL + SR',
+			9  => 'C + L + R + SL + SR',
+			10 => 'CL + CR + L + R + SL + SR',
+			11 => 'C + L + R+ LR + RR + OV',
+			12 => 'CF + CR + LF + RF + LR + RR',
+			13 => 'CL + C + CR + L + R + SL + SR',
+			14 => 'CL + CR + L + R + SL1 + SL2 + SR1 + SR2',
+			15 => 'CL + C+ CR + L + R + SL + S + SR',
+		);
+		return (isset($lookup[$index]) ? $lookup[$index] : 'user-defined');
+	}
+
+	public static function dialogNormalization($index, $version) {
+		switch ($version) {
+			case 7:
+				return 0 - $index;
+				break;
+			case 6:
+				return 0 - 16 - $index;
+				break;
+		}
+		return false;
+	}
+
+}