?<h3>D¨ızenle: module.audio.dts.php</h3>
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/////////////////////////////////////////////////////////////////
/// getID3() by James Heinrich &lt;info@getid3.org&gt;               //
//  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.dts.php                                        //
// module for analyzing DTS Audio files                        //
// dependencies: NONE                                          //
//                                                             //
/////////////////////////////////////////////////////////////////

if (!defined(&#039;GETID3_INCLUDEPATH&#039;)) { // prevent path-exposing attacks that access modules directly on public webservers
	exit;
}

/**
* @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 = &quot;\x7F\xFE\x80\x01&quot;;

	/**
	 * @var int
	 */
	private $readBinDataOffset = 0;

	/**
	 * Possible syncwords indicating bitstream encoding.
	 */
	public static $syncwords = array(
		0 =&gt; &quot;\x7F\xFE\x80\x01&quot;,  // raw big-endian
		1 =&gt; &quot;\xFE\x7F\x01\x80&quot;,  // raw little-endian
		2 =&gt; &quot;\x1F\xFF\xE8\x00&quot;,  // 14-bit big-endian
		3 =&gt; &quot;\xFF\x1F\x00\xE8&quot;); // 14-bit little-endian

	/**
	 * @return bool
	 */
	public function Analyze() {
		$info = &amp;$this-&gt;getid3-&gt;info;
		$info[&#039;fileformat&#039;] = &#039;dts&#039;;

		$this-&gt;fseek($info[&#039;avdataoffset&#039;]);
		$DTSheader = $this-&gt;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[&#039;dts&#039;][&#039;raw&#039;][&#039;magic&#039;] = $sync;
			$this-&gt;readBinDataOffset = 32;

		} elseif ($this-&gt;isDependencyFor(&#039;matroska&#039;)) {

			// Matroska contains DTS without syncword encoded as raw big-endian format
			$encoding = 0;
			$this-&gt;readBinDataOffset = 0;

		} else {

			unset($info[&#039;fileformat&#039;]);
			return $this-&gt;error(&#039;Expecting &quot;&#039;.implode(&#039;| &#039;, array_map(&#039;getid3_lib::PrintHexBytes&#039;, self::$syncwords)).&#039;&quot; at offset &#039;.$info[&#039;avdataoffset&#039;].&#039;, found &quot;&#039;.getid3_lib::PrintHexBytes($sync).&#039;&quot;&#039;);

		}

		// decode header
		$fhBS = &#039;&#039;;
		for ($word_offset = 0; $word_offset &lt;= strlen($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[&#039;dts&#039;][&#039;raw&#039;][&#039;frame_type&#039;]             =        $this-&gt;readBinData($fhBS,  1);
		$info[&#039;dts&#039;][&#039;raw&#039;][&#039;deficit_samples&#039;]        =        $this-&gt;readBinData($fhBS,  5);
		$info[&#039;dts&#039;][&#039;flags&#039;][&#039;crc_present&#039;]          = (bool) $this-&gt;readBinData($fhBS,  1);
		$info[&#039;dts&#039;][&#039;raw&#039;][&#039;pcm_sample_blocks&#039;]      =        $this-&gt;readBinData($fhBS,  7);
		$info[&#039;dts&#039;][&#039;raw&#039;][&#039;frame_byte_size&#039;]        =        $this-&gt;readBinData($fhBS, 14);
		$info[&#039;dts&#039;][&#039;raw&#039;][&#039;channel_arrangement&#039;]    =        $this-&gt;readBinData($fhBS,  6);
		$info[&#039;dts&#039;][&#039;raw&#039;][&#039;sample_frequency&#039;]       =        $this-&gt;readBinData($fhBS,  4);
		$info[&#039;dts&#039;][&#039;raw&#039;][&#039;bitrate&#039;]                =        $this-&gt;readBinData($fhBS,  5);
		$info[&#039;dts&#039;][&#039;flags&#039;][&#039;embedded_downmix&#039;]     = (bool) $this-&gt;readBinData($fhBS,  1);
		$info[&#039;dts&#039;][&#039;flags&#039;][&#039;dynamicrange&#039;]         = (bool) $this-&gt;readBinData($fhBS,  1);
		$info[&#039;dts&#039;][&#039;flags&#039;][&#039;timestamp&#039;]            = (bool) $this-&gt;readBinData($fhBS,  1);
		$info[&#039;dts&#039;][&#039;flags&#039;][&#039;auxdata&#039;]              = (bool) $this-&gt;readBinData($fhBS,  1);
		$info[&#039;dts&#039;][&#039;flags&#039;][&#039;hdcd&#039;]                 = (bool) $this-&gt;readBinData($fhBS,  1);
		$info[&#039;dts&#039;][&#039;raw&#039;][&#039;extension_audio&#039;]        =        $this-&gt;readBinData($fhBS,  3);
		$info[&#039;dts&#039;][&#039;flags&#039;][&#039;extended_coding&#039;]      = (bool) $this-&gt;readBinData($fhBS,  1);
		$info[&#039;dts&#039;][&#039;flags&#039;][&#039;audio_sync_insertion&#039;] = (bool) $this-&gt;readBinData($fhBS,  1);
		$info[&#039;dts&#039;][&#039;raw&#039;][&#039;lfe_effects&#039;]            =        $this-&gt;readBinData($fhBS,  2);
		$info[&#039;dts&#039;][&#039;flags&#039;][&#039;predictor_history&#039;]    = (bool) $this-&gt;readBinData($fhBS,  1);
		if ($info[&#039;dts&#039;][&#039;flags&#039;][&#039;crc_present&#039;]) {
			$info[&#039;dts&#039;][&#039;raw&#039;][&#039;crc16&#039;]              =        $this-&gt;readBinData($fhBS, 16);
		}
		$info[&#039;dts&#039;][&#039;flags&#039;][&#039;mri_perfect_reconst&#039;]  = (bool) $this-&gt;readBinData($fhBS,  1);
		$info[&#039;dts&#039;][&#039;raw&#039;][&#039;encoder_soft_version&#039;]   =        $this-&gt;readBinData($fhBS,  4);
		$info[&#039;dts&#039;][&#039;raw&#039;][&#039;copy_history&#039;]           =        $this-&gt;readBinData($fhBS,  2);
		$info[&#039;dts&#039;][&#039;raw&#039;][&#039;bits_per_sample&#039;]        =        $this-&gt;readBinData($fhBS,  2);
		$info[&#039;dts&#039;][&#039;flags&#039;][&#039;surround_es&#039;]          = (bool) $this-&gt;readBinData($fhBS,  1);
		$info[&#039;dts&#039;][&#039;flags&#039;][&#039;front_sum_diff&#039;]       = (bool) $this-&gt;readBinData($fhBS,  1);
		$info[&#039;dts&#039;][&#039;flags&#039;][&#039;surround_sum_diff&#039;]    = (bool) $this-&gt;readBinData($fhBS,  1);
		$info[&#039;dts&#039;][&#039;raw&#039;][&#039;dialog_normalization&#039;]   =        $this-&gt;readBinData($fhBS,  4);


		$info[&#039;dts&#039;][&#039;bitrate&#039;]              = self::bitrateLookup($info[&#039;dts&#039;][&#039;raw&#039;][&#039;bitrate&#039;]);
		$info[&#039;dts&#039;][&#039;bits_per_sample&#039;]      = self::bitPerSampleLookup($info[&#039;dts&#039;][&#039;raw&#039;][&#039;bits_per_sample&#039;]);
		$info[&#039;dts&#039;][&#039;sample_rate&#039;]          = self::sampleRateLookup($info[&#039;dts&#039;][&#039;raw&#039;][&#039;sample_frequency&#039;]);
		$info[&#039;dts&#039;][&#039;dialog_normalization&#039;] = self::dialogNormalization($info[&#039;dts&#039;][&#039;raw&#039;][&#039;dialog_normalization&#039;], $info[&#039;dts&#039;][&#039;raw&#039;][&#039;encoder_soft_version&#039;]);
		$info[&#039;dts&#039;][&#039;flags&#039;][&#039;lossless&#039;]    = (($info[&#039;dts&#039;][&#039;raw&#039;][&#039;bitrate&#039;] == 31) ? true  : false);
		$info[&#039;dts&#039;][&#039;bitrate_mode&#039;]         = (($info[&#039;dts&#039;][&#039;raw&#039;][&#039;bitrate&#039;] == 30) ? &#039;vbr&#039; : &#039;cbr&#039;);
		$info[&#039;dts&#039;][&#039;channels&#039;]             = self::numChannelsLookup($info[&#039;dts&#039;][&#039;raw&#039;][&#039;channel_arrangement&#039;]);
		$info[&#039;dts&#039;][&#039;channel_arrangement&#039;]  = self::channelArrangementLookup($info[&#039;dts&#039;][&#039;raw&#039;][&#039;channel_arrangement&#039;]);

		$info[&#039;audio&#039;][&#039;dataformat&#039;]          = &#039;dts&#039;;
		$info[&#039;audio&#039;][&#039;lossless&#039;]            = $info[&#039;dts&#039;][&#039;flags&#039;][&#039;lossless&#039;];
		$info[&#039;audio&#039;][&#039;bitrate_mode&#039;]        = $info[&#039;dts&#039;][&#039;bitrate_mode&#039;];
		$info[&#039;audio&#039;][&#039;bits_per_sample&#039;]     = $info[&#039;dts&#039;][&#039;bits_per_sample&#039;];
		$info[&#039;audio&#039;][&#039;sample_rate&#039;]         = $info[&#039;dts&#039;][&#039;sample_rate&#039;];
		$info[&#039;audio&#039;][&#039;channels&#039;]            = $info[&#039;dts&#039;][&#039;channels&#039;];
		$info[&#039;audio&#039;][&#039;bitrate&#039;]             = $info[&#039;dts&#039;][&#039;bitrate&#039;];
		if (isset($info[&#039;avdataend&#039;]) &amp;&amp; !empty($info[&#039;dts&#039;][&#039;bitrate&#039;]) &amp;&amp; is_numeric($info[&#039;dts&#039;][&#039;bitrate&#039;])) {
			$info[&#039;playtime_seconds&#039;]         = ($info[&#039;avdataend&#039;] - $info[&#039;avdataoffset&#039;]) / ($info[&#039;dts&#039;][&#039;bitrate&#039;] / 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[&#039;playtime_seconds&#039;] *= (14 / 16);
			}
		}
		return true;
	}

	/**
	 * @param string $bin
	 * @param int $length
	 *
	 * @return int
	 */
	private function readBinData($bin, $length) {
		$data = substr($bin, $this-&gt;readBinDataOffset, $length);
		$this-&gt;readBinDataOffset += $length;

		return bindec($data);
	}

	/**
	 * @param int $index
	 *
	 * @return int|string|false
	 */
	public static function bitrateLookup($index) {
		static $lookup = array(
			0  =&gt; 32000,
			1  =&gt; 56000,
			2  =&gt; 64000,
			3  =&gt; 96000,
			4  =&gt; 112000,
			5  =&gt; 128000,
			6  =&gt; 192000,
			7  =&gt; 224000,
			8  =&gt; 256000,
			9  =&gt; 320000,
			10 =&gt; 384000,
			11 =&gt; 448000,
			12 =&gt; 512000,
			13 =&gt; 576000,
			14 =&gt; 640000,
			15 =&gt; 768000,
			16 =&gt; 960000,
			17 =&gt; 1024000,
			18 =&gt; 1152000,
			19 =&gt; 1280000,
			20 =&gt; 1344000,
			21 =&gt; 1408000,
			22 =&gt; 1411200,
			23 =&gt; 1472000,
			24 =&gt; 1536000,
			25 =&gt; 1920000,
			26 =&gt; 2048000,
			27 =&gt; 3072000,
			28 =&gt; 3840000,
			29 =&gt; &#039;open&#039;,
			30 =&gt; &#039;variable&#039;,
			31 =&gt; &#039;lossless&#039;,
		);
		return (isset($lookup[$index]) ? $lookup[$index] : false);
	}

	/**
	 * @param int $index
	 *
	 * @return int|string|false
	 */
	public static function sampleRateLookup($index) {
		static $lookup = array(
			0  =&gt; &#039;invalid&#039;,
			1  =&gt; 8000,
			2  =&gt; 16000,
			3  =&gt; 32000,
			4  =&gt; &#039;invalid&#039;,
			5  =&gt; &#039;invalid&#039;,
			6  =&gt; 11025,
			7  =&gt; 22050,
			8  =&gt; 44100,
			9  =&gt; &#039;invalid&#039;,
			10 =&gt; &#039;invalid&#039;,
			11 =&gt; 12000,
			12 =&gt; 24000,
			13 =&gt; 48000,
			14 =&gt; &#039;invalid&#039;,
			15 =&gt; &#039;invalid&#039;,
		);
		return (isset($lookup[$index]) ? $lookup[$index] : false);
	}

	/**
	 * @param int $index
	 *
	 * @return int|false
	 */
	public static function bitPerSampleLookup($index) {
		static $lookup = array(
			0  =&gt; 16,
			1  =&gt; 20,
			2  =&gt; 24,
			3  =&gt; 24,
		);
		return (isset($lookup[$index]) ? $lookup[$index] : false);
	}

	/**
	 * @param int $index
	 *
	 * @return int|false
	 */
	public static function numChannelsLookup($index) {
		switch ($index) {
			case 0:
				return 1;
			case 1:
			case 2:
			case 3:
			case 4:
				return 2;
			case 5:
			case 6:
				return 3;
			case 7:
			case 8:
				return 4;
			case 9:
				return 5;
			case 10:
			case 11:
			case 12:
				return 6;
			case 13:
				return 7;
			case 14:
			case 15:
				return 8;
		}
		return false;
	}

	/**
	 * @param int $index
	 *
	 * @return string
	 */
	public static function channelArrangementLookup($index) {
		static $lookup = array(
			0  =&gt; &#039;A&#039;,
			1  =&gt; &#039;A + B (dual mono)&#039;,
			2  =&gt; &#039;L + R (stereo)&#039;,
			3  =&gt; &#039;(L+R) + (L-R) (sum-difference)&#039;,
			4  =&gt; &#039;LT + RT (left and right total)&#039;,
			5  =&gt; &#039;C + L + R&#039;,
			6  =&gt; &#039;L + R + S&#039;,
			7  =&gt; &#039;C + L + R + S&#039;,
			8  =&gt; &#039;L + R + SL + SR&#039;,
			9  =&gt; &#039;C + L + R + SL + SR&#039;,
			10 =&gt; &#039;CL + CR + L + R + SL + SR&#039;,
			11 =&gt; &#039;C + L + R+ LR + RR + OV&#039;,
			12 =&gt; &#039;CF + CR + LF + RF + LR + RR&#039;,
			13 =&gt; &#039;CL + C + CR + L + R + SL + SR&#039;,
			14 =&gt; &#039;CL + CR + L + R + SL1 + SL2 + SR1 + SR2&#039;,
			15 =&gt; &#039;CL + C+ CR + L + R + SL + S + SR&#039;,
		);
		return (isset($lookup[$index]) ? $lookup[$index] : &#039;user-defined&#039;);
	}

	/**
	 * @param int $index
	 * @param int $version
	 *
	 * @return int|false
	 */
	public static function dialogNormalization($index, $version) {
		switch ($version) {
			case 7:
				return 0 - $index;
			case 6:
				return 0 - 16 - $index;
		}
		return false;
	}

}
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