<?php

[0] Fix | Delete

[1] Fix | Delete

/////////////////////////////////////////////////////////////////

[2] Fix | Delete

/// getID3() by James Heinrich <info@getid3.org> //

[3] Fix | Delete

// available at https://github.com/JamesHeinrich/getID3 //

[4] Fix | Delete

// or https://www.getid3.org //

[5] Fix | Delete

// or http://getid3.sourceforge.net //

[6] Fix | Delete

// see readme.txt for more details //

[7] Fix | Delete

/////////////////////////////////////////////////////////////////

[8] Fix | Delete

// //

[9] Fix | Delete

// module.audio.dts.php //

[10] Fix | Delete

// module for analyzing DTS Audio files //

[11] Fix | Delete

// dependencies: NONE //

[12] Fix | Delete

// //

[13] Fix | Delete

/////////////////////////////////////////////////////////////////

[14] Fix | Delete

[15] Fix | Delete

if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers

[16] Fix | Delete

exit;

[17] Fix | Delete

}

[18] Fix | Delete

[19] Fix | Delete

/**

[20] Fix | Delete

* @tutorial http://wiki.multimedia.cx/index.php?title=DTS

[21] Fix | Delete

*/

[22] Fix | Delete

class getid3_dts extends getid3_handler

[23] Fix | Delete

{

[24] Fix | Delete

/**

[25] Fix | Delete

* Default DTS syncword used in native .cpt or .dts formats.

[26] Fix | Delete

*/

[27] Fix | Delete

const syncword = "\x7F\xFE\x80\x01";

[28] Fix | Delete

[29] Fix | Delete

/**

[30] Fix | Delete

* @var int

[31] Fix | Delete

*/

[32] Fix | Delete

private $readBinDataOffset = 0;

[33] Fix | Delete

[34] Fix | Delete

/**

[35] Fix | Delete

* Possible syncwords indicating bitstream encoding.

[36] Fix | Delete

*/

[37] Fix | Delete

public static $syncwords = array(

[38] Fix | Delete

0 => "\x7F\xFE\x80\x01", // raw big-endian

[39] Fix | Delete

1 => "\xFE\x7F\x01\x80", // raw little-endian

[40] Fix | Delete

2 => "\x1F\xFF\xE8\x00", // 14-bit big-endian

[41] Fix | Delete

3 => "\xFF\x1F\x00\xE8"); // 14-bit little-endian

[42] Fix | Delete

[43] Fix | Delete

/**

[44] Fix | Delete

* @return bool

[45] Fix | Delete

*/

[46] Fix | Delete

public function Analyze() {

[47] Fix | Delete

$info = &$this->getid3->info;

[48] Fix | Delete

$info['fileformat'] = 'dts';

[49] Fix | Delete

[50] Fix | Delete

$this->fseek($info['avdataoffset']);

[51] Fix | Delete

$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

[52] Fix | Delete

[53] Fix | Delete

// check syncword

[54] Fix | Delete

$sync = substr($DTSheader, 0, 4);

[55] Fix | Delete

if (($encoding = array_search($sync, self::$syncwords)) !== false) {

[56] Fix | Delete

[57] Fix | Delete

$info['dts']['raw']['magic'] = $sync;

[58] Fix | Delete

$this->readBinDataOffset = 32;

[59] Fix | Delete

[60] Fix | Delete

} elseif ($this->isDependencyFor('matroska')) {

[61] Fix | Delete

[62] Fix | Delete

// Matroska contains DTS without syncword encoded as raw big-endian format

[63] Fix | Delete

$encoding = 0;

[64] Fix | Delete

$this->readBinDataOffset = 0;

[65] Fix | Delete

[66] Fix | Delete

} else {

[67] Fix | Delete

[68] Fix | Delete

unset($info['fileformat']);

[69] Fix | Delete

return $this->error('Expecting "'.implode('| ', array_map('getid3_lib::PrintHexBytes', self::$syncwords)).'" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes($sync).'"');

[70] Fix | Delete

[71] Fix | Delete

}

[72] Fix | Delete

[73] Fix | Delete

// decode header

[74] Fix | Delete

$fhBS = '';

[75] Fix | Delete

for ($word_offset = 0; $word_offset <= strlen($DTSheader); $word_offset += 2) {

[76] Fix | Delete

switch ($encoding) {

[77] Fix | Delete

case 0: // raw big-endian

[78] Fix | Delete

$fhBS .= getid3_lib::BigEndian2Bin( substr($DTSheader, $word_offset, 2) );

[79] Fix | Delete

break;

[80] Fix | Delete

case 1: // raw little-endian

[81] Fix | Delete

$fhBS .= getid3_lib::BigEndian2Bin(strrev(substr($DTSheader, $word_offset, 2)));

[82] Fix | Delete

break;

[83] Fix | Delete

case 2: // 14-bit big-endian

[84] Fix | Delete

$fhBS .= substr(getid3_lib::BigEndian2Bin( substr($DTSheader, $word_offset, 2) ), 2, 14);

[85] Fix | Delete

break;

[86] Fix | Delete

case 3: // 14-bit little-endian

[87] Fix | Delete

$fhBS .= substr(getid3_lib::BigEndian2Bin(strrev(substr($DTSheader, $word_offset, 2))), 2, 14);

[88] Fix | Delete

break;

[89] Fix | Delete

}

[90] Fix | Delete

}

[91] Fix | Delete

[92] Fix | Delete

$info['dts']['raw']['frame_type'] = $this->readBinData($fhBS, 1);

[93] Fix | Delete

$info['dts']['raw']['deficit_samples'] = $this->readBinData($fhBS, 5);

[94] Fix | Delete

$info['dts']['flags']['crc_present'] = (bool) $this->readBinData($fhBS, 1);

[95] Fix | Delete

$info['dts']['raw']['pcm_sample_blocks'] = $this->readBinData($fhBS, 7);

[96] Fix | Delete

$info['dts']['raw']['frame_byte_size'] = $this->readBinData($fhBS, 14);

[97] Fix | Delete

$info['dts']['raw']['channel_arrangement'] = $this->readBinData($fhBS, 6);

[98] Fix | Delete

$info['dts']['raw']['sample_frequency'] = $this->readBinData($fhBS, 4);

[99] Fix | Delete

$info['dts']['raw']['bitrate'] = $this->readBinData($fhBS, 5);

[100] Fix | Delete

$info['dts']['flags']['embedded_downmix'] = (bool) $this->readBinData($fhBS, 1);

[101] Fix | Delete

$info['dts']['flags']['dynamicrange'] = (bool) $this->readBinData($fhBS, 1);

[102] Fix | Delete

$info['dts']['flags']['timestamp'] = (bool) $this->readBinData($fhBS, 1);

[103] Fix | Delete

$info['dts']['flags']['auxdata'] = (bool) $this->readBinData($fhBS, 1);

[104] Fix | Delete

$info['dts']['flags']['hdcd'] = (bool) $this->readBinData($fhBS, 1);

[105] Fix | Delete

$info['dts']['raw']['extension_audio'] = $this->readBinData($fhBS, 3);

[106] Fix | Delete

$info['dts']['flags']['extended_coding'] = (bool) $this->readBinData($fhBS, 1);

[107] Fix | Delete

$info['dts']['flags']['audio_sync_insertion'] = (bool) $this->readBinData($fhBS, 1);

[108] Fix | Delete

$info['dts']['raw']['lfe_effects'] = $this->readBinData($fhBS, 2);

[109] Fix | Delete

$info['dts']['flags']['predictor_history'] = (bool) $this->readBinData($fhBS, 1);

[110] Fix | Delete

if ($info['dts']['flags']['crc_present']) {

[111] Fix | Delete

$info['dts']['raw']['crc16'] = $this->readBinData($fhBS, 16);

[112] Fix | Delete

}

[113] Fix | Delete

$info['dts']['flags']['mri_perfect_reconst'] = (bool) $this->readBinData($fhBS, 1);

[114] Fix | Delete

$info['dts']['raw']['encoder_soft_version'] = $this->readBinData($fhBS, 4);

[115] Fix | Delete

$info['dts']['raw']['copy_history'] = $this->readBinData($fhBS, 2);

[116] Fix | Delete

$info['dts']['raw']['bits_per_sample'] = $this->readBinData($fhBS, 2);

[117] Fix | Delete

$info['dts']['flags']['surround_es'] = (bool) $this->readBinData($fhBS, 1);

[118] Fix | Delete

$info['dts']['flags']['front_sum_diff'] = (bool) $this->readBinData($fhBS, 1);

[119] Fix | Delete

$info['dts']['flags']['surround_sum_diff'] = (bool) $this->readBinData($fhBS, 1);

[120] Fix | Delete

$info['dts']['raw']['dialog_normalization'] = $this->readBinData($fhBS, 4);

[121] Fix | Delete

[122] Fix | Delete

[123] Fix | Delete

$info['dts']['bitrate'] = self::bitrateLookup($info['dts']['raw']['bitrate']);

[124] Fix | Delete

$info['dts']['bits_per_sample'] = self::bitPerSampleLookup($info['dts']['raw']['bits_per_sample']);

[125] Fix | Delete

$info['dts']['sample_rate'] = self::sampleRateLookup($info['dts']['raw']['sample_frequency']);

[126] Fix | Delete

$info['dts']['dialog_normalization'] = self::dialogNormalization($info['dts']['raw']['dialog_normalization'], $info['dts']['raw']['encoder_soft_version']);

[127] Fix | Delete

$info['dts']['flags']['lossless'] = (($info['dts']['raw']['bitrate'] == 31) ? true : false);

[128] Fix | Delete

$info['dts']['bitrate_mode'] = (($info['dts']['raw']['bitrate'] == 30) ? 'vbr' : 'cbr');

[129] Fix | Delete

$info['dts']['channels'] = self::numChannelsLookup($info['dts']['raw']['channel_arrangement']);

[130] Fix | Delete

$info['dts']['channel_arrangement'] = self::channelArrangementLookup($info['dts']['raw']['channel_arrangement']);

[131] Fix | Delete

[132] Fix | Delete

$info['audio']['dataformat'] = 'dts';

[133] Fix | Delete

$info['audio']['lossless'] = $info['dts']['flags']['lossless'];

[134] Fix | Delete

$info['audio']['bitrate_mode'] = $info['dts']['bitrate_mode'];

[135] Fix | Delete

$info['audio']['bits_per_sample'] = $info['dts']['bits_per_sample'];

[136] Fix | Delete

$info['audio']['sample_rate'] = $info['dts']['sample_rate'];

[137] Fix | Delete

$info['audio']['channels'] = $info['dts']['channels'];

[138] Fix | Delete

$info['audio']['bitrate'] = $info['dts']['bitrate'];

[139] Fix | Delete

if (isset($info['avdataend']) && !empty($info['dts']['bitrate']) && is_numeric($info['dts']['bitrate'])) {

[140] Fix | Delete

$info['playtime_seconds'] = ($info['avdataend'] - $info['avdataoffset']) / ($info['dts']['bitrate'] / 8);

[141] Fix | Delete

if (($encoding == 2) || ($encoding == 3)) {

[142] Fix | Delete

// 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

[143] Fix | Delete

$info['playtime_seconds'] *= (14 / 16);

[144] Fix | Delete

}

[145] Fix | Delete

}

[146] Fix | Delete

return true;

[147] Fix | Delete

}

[148] Fix | Delete

[149] Fix | Delete

/**

[150] Fix | Delete

* @param string $bin

[151] Fix | Delete

* @param int $length

[152] Fix | Delete

*

[153] Fix | Delete

* @return int

[154] Fix | Delete

*/

[155] Fix | Delete

private function readBinData($bin, $length) {

[156] Fix | Delete

$data = substr($bin, $this->readBinDataOffset, $length);

[157] Fix | Delete

$this->readBinDataOffset += $length;

[158] Fix | Delete

[159] Fix | Delete

return bindec($data);

[160] Fix | Delete

}

[161] Fix | Delete

[162] Fix | Delete

/**

[163] Fix | Delete

* @param int $index

[164] Fix | Delete

*

[165] Fix | Delete

* @return int|string|false

[166] Fix | Delete

*/

[167] Fix | Delete

public static function bitrateLookup($index) {

[168] Fix | Delete

static $lookup = array(

[169] Fix | Delete

0 => 32000,

[170] Fix | Delete

1 => 56000,

[171] Fix | Delete

2 => 64000,

[172] Fix | Delete

3 => 96000,

[173] Fix | Delete

4 => 112000,

[174] Fix | Delete

5 => 128000,

[175] Fix | Delete

6 => 192000,

[176] Fix | Delete

7 => 224000,

[177] Fix | Delete

8 => 256000,

[178] Fix | Delete

9 => 320000,

[179] Fix | Delete

10 => 384000,

[180] Fix | Delete

11 => 448000,

[181] Fix | Delete

12 => 512000,

[182] Fix | Delete

13 => 576000,

[183] Fix | Delete

14 => 640000,

[184] Fix | Delete

15 => 768000,

[185] Fix | Delete

16 => 960000,

[186] Fix | Delete

17 => 1024000,

[187] Fix | Delete

18 => 1152000,

[188] Fix | Delete

19 => 1280000,

[189] Fix | Delete

20 => 1344000,

[190] Fix | Delete

21 => 1408000,

[191] Fix | Delete

22 => 1411200,

[192] Fix | Delete

23 => 1472000,

[193] Fix | Delete

24 => 1536000,

[194] Fix | Delete

25 => 1920000,

[195] Fix | Delete

26 => 2048000,

[196] Fix | Delete

27 => 3072000,

[197] Fix | Delete

28 => 3840000,

[198] Fix | Delete

29 => 'open',

[199] Fix | Delete

30 => 'variable',

[200] Fix | Delete

31 => 'lossless',

[201] Fix | Delete

);

[202] Fix | Delete

return (isset($lookup[$index]) ? $lookup[$index] : false);

[203] Fix | Delete

}

[204] Fix | Delete

[205] Fix | Delete

/**

[206] Fix | Delete

* @param int $index

[207] Fix | Delete

*

[208] Fix | Delete

* @return int|string|false

[209] Fix | Delete

*/

[210] Fix | Delete

public static function sampleRateLookup($index) {

[211] Fix | Delete

static $lookup = array(

[212] Fix | Delete

0 => 'invalid',

[213] Fix | Delete

1 => 8000,

[214] Fix | Delete

2 => 16000,

[215] Fix | Delete

3 => 32000,

[216] Fix | Delete

4 => 'invalid',

[217] Fix | Delete

5 => 'invalid',

[218] Fix | Delete

6 => 11025,

[219] Fix | Delete

7 => 22050,

[220] Fix | Delete

8 => 44100,

[221] Fix | Delete

9 => 'invalid',

[222] Fix | Delete

10 => 'invalid',

[223] Fix | Delete

11 => 12000,

[224] Fix | Delete

12 => 24000,

[225] Fix | Delete

13 => 48000,

[226] Fix | Delete

14 => 'invalid',

[227] Fix | Delete

15 => 'invalid',

[228] Fix | Delete

);

[229] Fix | Delete

return (isset($lookup[$index]) ? $lookup[$index] : false);

[230] Fix | Delete

}

[231] Fix | Delete

[232] Fix | Delete

/**

[233] Fix | Delete

* @param int $index

[234] Fix | Delete

*

[235] Fix | Delete

* @return int|false

[236] Fix | Delete

*/

[237] Fix | Delete

public static function bitPerSampleLookup($index) {

[238] Fix | Delete

static $lookup = array(

[239] Fix | Delete

0 => 16,

[240] Fix | Delete

1 => 20,

[241] Fix | Delete

2 => 24,

[242] Fix | Delete

3 => 24,

[243] Fix | Delete

);

[244] Fix | Delete

return (isset($lookup[$index]) ? $lookup[$index] : false);

[245] Fix | Delete

}

[246] Fix | Delete

[247] Fix | Delete

/**

[248] Fix | Delete

* @param int $index

[249] Fix | Delete

*

[250] Fix | Delete

* @return int|false

[251] Fix | Delete

*/

[252] Fix | Delete

public static function numChannelsLookup($index) {

[253] Fix | Delete

switch ($index) {

[254] Fix | Delete

case 0:

[255] Fix | Delete

return 1;

[256] Fix | Delete

case 1:

[257] Fix | Delete

case 2:

[258] Fix | Delete

case 3:

[259] Fix | Delete

case 4:

[260] Fix | Delete

return 2;

[261] Fix | Delete

case 5:

[262] Fix | Delete

case 6:

[263] Fix | Delete

return 3;

[264] Fix | Delete

case 7:

[265] Fix | Delete

case 8:

[266] Fix | Delete

return 4;

[267] Fix | Delete

case 9:

[268] Fix | Delete

return 5;

[269] Fix | Delete

case 10:

[270] Fix | Delete

case 11:

[271] Fix | Delete

case 12:

[272] Fix | Delete

return 6;

[273] Fix | Delete

case 13:

[274] Fix | Delete

return 7;

[275] Fix | Delete

case 14:

[276] Fix | Delete

case 15:

[277] Fix | Delete

return 8;

[278] Fix | Delete

}

[279] Fix | Delete

return false;

[280] Fix | Delete

}

[281] Fix | Delete

[282] Fix | Delete

/**

[283] Fix | Delete

* @param int $index

[284] Fix | Delete

*

[285] Fix | Delete

* @return string

[286] Fix | Delete

*/

[287] Fix | Delete

public static function channelArrangementLookup($index) {

[288] Fix | Delete

static $lookup = array(

[289] Fix | Delete

0 => 'A',

[290] Fix | Delete

1 => 'A + B (dual mono)',

[291] Fix | Delete

2 => 'L + R (stereo)',

[292] Fix | Delete

3 => '(L+R) + (L-R) (sum-difference)',

[293] Fix | Delete

4 => 'LT + RT (left and right total)',

[294] Fix | Delete

5 => 'C + L + R',

[295] Fix | Delete

6 => 'L + R + S',

[296] Fix | Delete

7 => 'C + L + R + S',

[297] Fix | Delete

8 => 'L + R + SL + SR',

[298] Fix | Delete

9 => 'C + L + R + SL + SR',

[299] Fix | Delete

10 => 'CL + CR + L + R + SL + SR',

[300] Fix | Delete

11 => 'C + L + R+ LR + RR + OV',

[301] Fix | Delete

12 => 'CF + CR + LF + RF + LR + RR',

[302] Fix | Delete

13 => 'CL + C + CR + L + R + SL + SR',

[303] Fix | Delete

14 => 'CL + CR + L + R + SL1 + SL2 + SR1 + SR2',

[304] Fix | Delete

15 => 'CL + C+ CR + L + R + SL + S + SR',

[305] Fix | Delete

);

[306] Fix | Delete

return (isset($lookup[$index]) ? $lookup[$index] : 'user-defined');

[307] Fix | Delete

}

[308] Fix | Delete

[309] Fix | Delete

/**

[310] Fix | Delete

* @param int $index

[311] Fix | Delete

* @param int $version

[312] Fix | Delete

*

[313] Fix | Delete

* @return int|false

[314] Fix | Delete

*/

[315] Fix | Delete

public static function dialogNormalization($index, $version) {

[316] Fix | Delete

switch ($version) {

[317] Fix | Delete

case 7:

[318] Fix | Delete

return 0 - $index;

[319] Fix | Delete

case 6:

[320] Fix | Delete

return 0 - 16 - $index;

[321] Fix | Delete

}

[322] Fix | Delete

return false;

[323] Fix | Delete

}

[324] Fix | Delete

[325] Fix | Delete

}

[326] Fix | Delete

[327] Fix | Delete