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-rw-r--r--getid3/module.audio.dts.php239
1 files changed, 239 insertions, 0 deletions
diff --git a/getid3/module.audio.dts.php b/getid3/module.audio.dts.php
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+++ b/getid3/module.audio.dts.php
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+<?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 //
+// //
+/////////////////////////////////////////////////////////////////
+
+
+class getid3_dts
+{
+
+ function getid3_dts(&$fd, &$ThisFileInfo) {
+ // Specs taken from "DTS Coherent Acoustics;Core and Extensions, ETSI TS 102 114 V1.2.1 (2002-12)"
+ // (http://pda.etsi.org/pda/queryform.asp)
+ // With thanks to Gambit <macteam@users.sourceforge.net> http://mac.sourceforge.net/atl/
+
+ $ThisFileInfo['fileformat'] = 'dts';
+
+ fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET);
+ $DTSheader = fread($fd, 16);
+
+ $ThisFileInfo['dts']['raw']['magic'] = getid3_lib::BigEndian2Int(substr($DTSheader, 0, 4));
+ if ($ThisFileInfo['dts']['raw']['magic'] != 0x7FFE8001) {
+ $ThisFileInfo['error'][] = 'Expecting "0x7FFE8001" at offset '.$ThisFileInfo['avdataoffset'].', found "0x'.str_pad(strtoupper(dechex($ThisFileInfo['dts']['raw']['magic'])), 8, '0', STR_PAD_LEFT).'"';
+ unset($ThisFileInfo['fileformat']);
+ unset($ThisFileInfo['dts']);
+ return false;
+ }
+
+ $fhBS = getid3_lib::BigEndian2Bin(substr($DTSheader, 4, 12));
+ $bsOffset = 0;
+ $ThisFileInfo['dts']['raw']['frame_type'] = bindec(substr($fhBS, $bsOffset, 1)); $bsOffset += 1;
+ $ThisFileInfo['dts']['raw']['deficit_samples'] = bindec(substr($fhBS, $bsOffset, 5)); $bsOffset += 5;
+ $ThisFileInfo['dts']['flags']['crc_present'] = (bool) bindec(substr($fhBS, $bsOffset, 1)); $bsOffset += 1;
+ $ThisFileInfo['dts']['raw']['pcm_sample_blocks'] = bindec(substr($fhBS, $bsOffset, 7)); $bsOffset += 7;
+ $ThisFileInfo['dts']['raw']['frame_byte_size'] = bindec(substr($fhBS, $bsOffset, 14)); $bsOffset += 14;
+ $ThisFileInfo['dts']['raw']['channel_arrangement'] = bindec(substr($fhBS, $bsOffset, 6)); $bsOffset += 6;
+ $ThisFileInfo['dts']['raw']['sample_frequency'] = bindec(substr($fhBS, $bsOffset, 4)); $bsOffset += 4;
+ $ThisFileInfo['dts']['raw']['bitrate'] = bindec(substr($fhBS, $bsOffset, 5)); $bsOffset += 5;
+ $ThisFileInfo['dts']['flags']['embedded_downmix'] = (bool) bindec(substr($fhBS, $bsOffset, 1)); $bsOffset += 1;
+ $ThisFileInfo['dts']['flags']['dynamicrange'] = (bool) bindec(substr($fhBS, $bsOffset, 1)); $bsOffset += 1;
+ $ThisFileInfo['dts']['flags']['timestamp'] = (bool) bindec(substr($fhBS, $bsOffset, 1)); $bsOffset += 1;
+ $ThisFileInfo['dts']['flags']['auxdata'] = (bool) bindec(substr($fhBS, $bsOffset, 1)); $bsOffset += 1;
+ $ThisFileInfo['dts']['flags']['hdcd'] = (bool) bindec(substr($fhBS, $bsOffset, 1)); $bsOffset += 1;
+ $ThisFileInfo['dts']['raw']['extension_audio'] = bindec(substr($fhBS, $bsOffset, 3)); $bsOffset += 3;
+ $ThisFileInfo['dts']['flags']['extended_coding'] = (bool) bindec(substr($fhBS, $bsOffset, 1)); $bsOffset += 1;
+ $ThisFileInfo['dts']['flags']['audio_sync_insertion'] = (bool) bindec(substr($fhBS, $bsOffset, 1)); $bsOffset += 1;
+ $ThisFileInfo['dts']['raw']['lfe_effects'] = bindec(substr($fhBS, $bsOffset, 2)); $bsOffset += 2;
+ $ThisFileInfo['dts']['flags']['predictor_history'] = (bool) bindec(substr($fhBS, $bsOffset, 1)); $bsOffset += 1;
+ if ($ThisFileInfo['dts']['flags']['crc_present']) {
+ $ThisFileInfo['dts']['raw']['crc16'] = bindec(substr($fhBS, $bsOffset, 16)); $bsOffset += 16;
+ }
+ $ThisFileInfo['dts']['flags']['mri_perfect_reconst'] = (bool) bindec(substr($fhBS, $bsOffset, 1)); $bsOffset += 1;
+ $ThisFileInfo['dts']['raw']['encoder_soft_version'] = bindec(substr($fhBS, $bsOffset, 4)); $bsOffset += 4;
+ $ThisFileInfo['dts']['raw']['copy_history'] = bindec(substr($fhBS, $bsOffset, 2)); $bsOffset += 2;
+ $ThisFileInfo['dts']['raw']['bits_per_sample'] = bindec(substr($fhBS, $bsOffset, 2)); $bsOffset += 2;
+ $ThisFileInfo['dts']['flags']['surround_es'] = (bool) bindec(substr($fhBS, $bsOffset, 1)); $bsOffset += 1;
+ $ThisFileInfo['dts']['flags']['front_sum_diff'] = (bool) bindec(substr($fhBS, $bsOffset, 1)); $bsOffset += 1;
+ $ThisFileInfo['dts']['flags']['surround_sum_diff'] = (bool) bindec(substr($fhBS, $bsOffset, 1)); $bsOffset += 1;
+ $ThisFileInfo['dts']['raw']['dialog_normalization'] = bindec(substr($fhBS, $bsOffset, 4)); $bsOffset += 4;
+
+
+ $ThisFileInfo['dts']['bitrate'] = $this->DTSbitrateLookup($ThisFileInfo['dts']['raw']['bitrate']);
+ $ThisFileInfo['dts']['bits_per_sample'] = $this->DTSbitPerSampleLookup($ThisFileInfo['dts']['raw']['bits_per_sample']);
+ $ThisFileInfo['dts']['sample_rate'] = $this->DTSsampleRateLookup($ThisFileInfo['dts']['raw']['sample_frequency']);
+ $ThisFileInfo['dts']['dialog_normalization'] = $this->DTSdialogNormalization($ThisFileInfo['dts']['raw']['dialog_normalization'], $ThisFileInfo['dts']['raw']['encoder_soft_version']);
+ $ThisFileInfo['dts']['flags']['lossless'] = (($ThisFileInfo['dts']['raw']['bitrate'] == 31) ? true : false);
+ $ThisFileInfo['dts']['bitrate_mode'] = (($ThisFileInfo['dts']['raw']['bitrate'] == 30) ? 'vbr' : 'cbr');
+ $ThisFileInfo['dts']['channels'] = $this->DTSnumChannelsLookup($ThisFileInfo['dts']['raw']['channel_arrangement']);
+ $ThisFileInfo['dts']['channel_arrangement'] = $this->DTSchannelArrangementLookup($ThisFileInfo['dts']['raw']['channel_arrangement']);
+
+ $ThisFileInfo['audio']['dataformat'] = 'dts';
+ $ThisFileInfo['audio']['lossless'] = $ThisFileInfo['dts']['flags']['lossless'];
+ $ThisFileInfo['audio']['bitrate_mode'] = $ThisFileInfo['dts']['bitrate_mode'];
+ $ThisFileInfo['audio']['bits_per_sample'] = $ThisFileInfo['dts']['bits_per_sample'];
+ $ThisFileInfo['audio']['sample_rate'] = $ThisFileInfo['dts']['sample_rate'];
+ $ThisFileInfo['audio']['channels'] = $ThisFileInfo['dts']['channels'];
+ $ThisFileInfo['audio']['bitrate'] = $ThisFileInfo['dts']['bitrate'];
+ if (isset($ThisFileInfo['avdataend'])) {
+ $ThisFileInfo['playtime_seconds'] = ($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) / ($ThisFileInfo['dts']['bitrate'] / 8);
+ }
+
+ return true;
+ }
+
+ function DTSbitrateLookup($index) {
+ $DTSbitrateLookup = array(
+ 0 => 32000,
+ 1 => 56000,
+ 2 => 64000,
+ 3 => 96000,
+ 4 => 112000,
+ 5 => 128000,
+ 6 => 192000,
+ 7 => 224000,
+ 8 => 256000,
+ 9 => 320000,
+ 10 => 384000,
+ 11 => 448000,
+ 12 => 512000,
+ 13 => 576000,
+ 14 => 640000,
+ 15 => 768000,
+ 16 => 960000,
+ 17 => 1024000,
+ 18 => 1152000,
+ 19 => 1280000,
+ 20 => 1344000,
+ 21 => 1408000,
+ 22 => 1411200,
+ 23 => 1472000,
+ 24 => 1536000,
+ 25 => 1920000,
+ 26 => 2048000,
+ 27 => 3072000,
+ 28 => 3840000,
+ 29 => 'open',
+ 30 => 'variable',
+ 31 => 'lossless'
+ );
+ return @$DTSbitrateLookup[$index];
+ }
+
+ function DTSsampleRateLookup($index) {
+ $DTSsampleRateLookup = array(
+ 0 => 'invalid',
+ 1 => 8000,
+ 2 => 16000,
+ 3 => 32000,
+ 4 => 'invalid',
+ 5 => 'invalid',
+ 6 => 11025,
+ 7 => 22050,
+ 8 => 44100,
+ 9 => 'invalid',
+ 10 => 'invalid',
+ 11 => 12000,
+ 12 => 24000,
+ 13 => 48000,
+ 14 => 'invalid',
+ 15 => 'invalid'
+ );
+ return @$DTSsampleRateLookup[$index];
+ }
+
+ function DTSbitPerSampleLookup($index) {
+ $DTSbitPerSampleLookup = array(
+ 0 => 16,
+ 1 => 20,
+ 2 => 24,
+ 3 => 24,
+ );
+ return @$DTSbitPerSampleLookup[$index];
+ }
+
+ function DTSnumChannelsLookup($index) {
+ switch ($index) {
+ case 0:
+ return 1;
+ break;
+ case 1:
+ case 2:
+ case 3:
+ case 4:
+ return 2;
+ break;
+ case 5:
+ case 6:
+ return 3;
+ break;
+ case 7:
+ case 8:
+ return 4;
+ break;
+ case 9:
+ return 5;
+ break;
+ case 10:
+ case 11:
+ case 12:
+ return 6;
+ break;
+ case 13:
+ return 7;
+ break;
+ case 14:
+ case 15:
+ return 8;
+ break;
+ }
+ return false;
+ }
+
+ function DTSchannelArrangementLookup($index) {
+ $DTSchannelArrangementLookup = array(
+ 0 => 'A',
+ 1 => 'A + B (dual mono)',
+ 2 => 'L + R (stereo)',
+ 3 => '(L+R) + (L-R) (sum-difference)',
+ 4 => 'LT + RT (left and right total)',
+ 5 => 'C + L + R',
+ 6 => 'L + R + S',
+ 7 => 'C + L + R + S',
+ 8 => 'L + R + SL + SR',
+ 9 => 'C + L + R + SL + SR',
+ 10 => 'CL + CR + L + R + SL + SR',
+ 11 => 'C + L + R+ LR + RR + OV',
+ 12 => 'CF + CR + LF + RF + LR + RR',
+ 13 => 'CL + C + CR + L + R + SL + SR',
+ 14 => 'CL + CR + L + R + SL1 + SL2 + SR1 + SR2',
+ 15 => 'CL + C+ CR + L + R + SL + S + SR',
+ );
+ return (@$DTSchannelArrangementLookup[$index] ? @$DTSchannelArrangementLookup[$index] : 'user-defined');
+ }
+
+ function DTSdialogNormalization($index, $version) {
+ switch ($version) {
+ case 7:
+ return 0 - $index;
+ break;
+ case 6:
+ return 0 - 16 - $index;
+ break;
+ }
+ return false;
+ }
+
+}
+
+
+?> \ No newline at end of file
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-14 16:57:53 +0000