--- /dev/null
+<?php
+/////////////////////////////////////////////////////////////////
+/// getID3() by James Heinrich <info@getid3.org> //
+// available at http://getid3.sourceforge.net //
+// or http://www.getid3.org //
+// also https://github.com/JamesHeinrich/getID3 //
+/////////////////////////////////////////////////////////////////
+// See readme.txt for more details //
+/////////////////////////////////////////////////////////////////
+// //
+// module.audio.la.php //
+// module for analyzing BONK audio files //
+// dependencies: module.tag.id3v2.php (optional) //
+// ///
+/////////////////////////////////////////////////////////////////
+
+
+class getid3_bonk extends getid3_handler
+{
+ public function Analyze() {
+ $info = &$this->getid3->info;
+
+ // shortcut
+ $info['bonk'] = array();
+ $thisfile_bonk = &$info['bonk'];
+
+ $thisfile_bonk['dataoffset'] = $info['avdataoffset'];
+ $thisfile_bonk['dataend'] = $info['avdataend'];
+
+ if (!getid3_lib::intValueSupported($thisfile_bonk['dataend'])) {
+
+ $this->warning('Unable to parse BONK file from end (v0.6+ preferred method) because PHP filesystem functions only support up to '.round(PHP_INT_MAX / 1073741824).'GB');
+
+ } else {
+
+ // scan-from-end method, for v0.6 and higher
+ $this->fseek($thisfile_bonk['dataend'] - 8);
+ $PossibleBonkTag = $this->fread(8);
+ while ($this->BonkIsValidTagName(substr($PossibleBonkTag, 4, 4), true)) {
+ $BonkTagSize = getid3_lib::LittleEndian2Int(substr($PossibleBonkTag, 0, 4));
+ $this->fseek(0 - $BonkTagSize, SEEK_CUR);
+ $BonkTagOffset = $this->ftell();
+ $TagHeaderTest = $this->fread(5);
+ if (($TagHeaderTest{0} != "\x00") || (substr($PossibleBonkTag, 4, 4) != strtolower(substr($PossibleBonkTag, 4, 4)))) {
+ $this->error('Expecting "'.getid3_lib::PrintHexBytes("\x00".strtoupper(substr($PossibleBonkTag, 4, 4))).'" at offset '.$BonkTagOffset.', found "'.getid3_lib::PrintHexBytes($TagHeaderTest).'"');
+ return false;
+ }
+ $BonkTagName = substr($TagHeaderTest, 1, 4);
+
+ $thisfile_bonk[$BonkTagName]['size'] = $BonkTagSize;
+ $thisfile_bonk[$BonkTagName]['offset'] = $BonkTagOffset;
+ $this->HandleBonkTags($BonkTagName);
+ $NextTagEndOffset = $BonkTagOffset - 8;
+ if ($NextTagEndOffset < $thisfile_bonk['dataoffset']) {
+ if (empty($info['audio']['encoder'])) {
+ $info['audio']['encoder'] = 'Extended BONK v0.9+';
+ }
+ return true;
+ }
+ $this->fseek($NextTagEndOffset);
+ $PossibleBonkTag = $this->fread(8);
+ }
+
+ }
+
+ // seek-from-beginning method for v0.4 and v0.5
+ if (empty($thisfile_bonk['BONK'])) {
+ $this->fseek($thisfile_bonk['dataoffset']);
+ do {
+ $TagHeaderTest = $this->fread(5);
+ switch ($TagHeaderTest) {
+ case "\x00".'BONK':
+ if (empty($info['audio']['encoder'])) {
+ $info['audio']['encoder'] = 'BONK v0.4';
+ }
+ break;
+
+ case "\x00".'INFO':
+ $info['audio']['encoder'] = 'Extended BONK v0.5';
+ break;
+
+ default:
+ break 2;
+ }
+ $BonkTagName = substr($TagHeaderTest, 1, 4);
+ $thisfile_bonk[$BonkTagName]['size'] = $thisfile_bonk['dataend'] - $thisfile_bonk['dataoffset'];
+ $thisfile_bonk[$BonkTagName]['offset'] = $thisfile_bonk['dataoffset'];
+ $this->HandleBonkTags($BonkTagName);
+
+ } while (true);
+ }
+
+ // parse META block for v0.6 - v0.8
+ if (empty($thisfile_bonk['INFO']) && isset($thisfile_bonk['META']['tags']['info'])) {
+ $this->fseek($thisfile_bonk['META']['tags']['info']);
+ $TagHeaderTest = $this->fread(5);
+ if ($TagHeaderTest == "\x00".'INFO') {
+ $info['audio']['encoder'] = 'Extended BONK v0.6 - v0.8';
+
+ $BonkTagName = substr($TagHeaderTest, 1, 4);
+ $thisfile_bonk[$BonkTagName]['size'] = $thisfile_bonk['dataend'] - $thisfile_bonk['dataoffset'];
+ $thisfile_bonk[$BonkTagName]['offset'] = $thisfile_bonk['dataoffset'];
+ $this->HandleBonkTags($BonkTagName);
+ }
+ }
+
+ if (empty($info['audio']['encoder'])) {
+ $info['audio']['encoder'] = 'Extended BONK v0.9+';
+ }
+ if (empty($thisfile_bonk['BONK'])) {
+ unset($info['bonk']);
+ }
+ return true;
+
+ }
+
+ public function HandleBonkTags($BonkTagName) {
+ $info = &$this->getid3->info;
+ switch ($BonkTagName) {
+ case 'BONK':
+ // shortcut
+ $thisfile_bonk_BONK = &$info['bonk']['BONK'];
+
+ $BonkData = "\x00".'BONK'.$this->fread(17);
+ $thisfile_bonk_BONK['version'] = getid3_lib::LittleEndian2Int(substr($BonkData, 5, 1));
+ $thisfile_bonk_BONK['number_samples'] = getid3_lib::LittleEndian2Int(substr($BonkData, 6, 4));
+ $thisfile_bonk_BONK['sample_rate'] = getid3_lib::LittleEndian2Int(substr($BonkData, 10, 4));
+
+ $thisfile_bonk_BONK['channels'] = getid3_lib::LittleEndian2Int(substr($BonkData, 14, 1));
+ $thisfile_bonk_BONK['lossless'] = (bool) getid3_lib::LittleEndian2Int(substr($BonkData, 15, 1));
+ $thisfile_bonk_BONK['joint_stereo'] = (bool) getid3_lib::LittleEndian2Int(substr($BonkData, 16, 1));
+ $thisfile_bonk_BONK['number_taps'] = getid3_lib::LittleEndian2Int(substr($BonkData, 17, 2));
+ $thisfile_bonk_BONK['downsampling_ratio'] = getid3_lib::LittleEndian2Int(substr($BonkData, 19, 1));
+ $thisfile_bonk_BONK['samples_per_packet'] = getid3_lib::LittleEndian2Int(substr($BonkData, 20, 2));
+
+ $info['avdataoffset'] = $thisfile_bonk_BONK['offset'] + 5 + 17;
+ $info['avdataend'] = $thisfile_bonk_BONK['offset'] + $thisfile_bonk_BONK['size'];
+
+ $info['fileformat'] = 'bonk';
+ $info['audio']['dataformat'] = 'bonk';
+ $info['audio']['bitrate_mode'] = 'vbr'; // assumed
+ $info['audio']['channels'] = $thisfile_bonk_BONK['channels'];
+ $info['audio']['sample_rate'] = $thisfile_bonk_BONK['sample_rate'];
+ $info['audio']['channelmode'] = ($thisfile_bonk_BONK['joint_stereo'] ? 'joint stereo' : 'stereo');
+ $info['audio']['lossless'] = $thisfile_bonk_BONK['lossless'];
+ $info['audio']['codec'] = 'bonk';
+
+ $info['playtime_seconds'] = $thisfile_bonk_BONK['number_samples'] / ($thisfile_bonk_BONK['sample_rate'] * $thisfile_bonk_BONK['channels']);
+ if ($info['playtime_seconds'] > 0) {
+ $info['audio']['bitrate'] = (($info['bonk']['dataend'] - $info['bonk']['dataoffset']) * 8) / $info['playtime_seconds'];
+ }
+ break;
+
+ case 'INFO':
+ // shortcut
+ $thisfile_bonk_INFO = &$info['bonk']['INFO'];
+
+ $thisfile_bonk_INFO['version'] = getid3_lib::LittleEndian2Int($this->fread(1));
+ $thisfile_bonk_INFO['entries_count'] = 0;
+ $NextInfoDataPair = $this->fread(5);
+ if (!$this->BonkIsValidTagName(substr($NextInfoDataPair, 1, 4))) {
+ while (!feof($this->getid3->fp)) {
+ //$CurrentSeekInfo['offset'] = getid3_lib::LittleEndian2Int(substr($NextInfoDataPair, 0, 4));
+ //$CurrentSeekInfo['nextbit'] = getid3_lib::LittleEndian2Int(substr($NextInfoDataPair, 4, 1));
+ //$thisfile_bonk_INFO[] = $CurrentSeekInfo;
+
+ $NextInfoDataPair = $this->fread(5);
+ if ($this->BonkIsValidTagName(substr($NextInfoDataPair, 1, 4))) {
+ $this->fseek(-5, SEEK_CUR);
+ break;
+ }
+ $thisfile_bonk_INFO['entries_count']++;
+ }
+ }
+ break;
+
+ case 'META':
+ $BonkData = "\x00".'META'.$this->fread($info['bonk']['META']['size'] - 5);
+ $info['bonk']['META']['version'] = getid3_lib::LittleEndian2Int(substr($BonkData, 5, 1));
+
+ $MetaTagEntries = floor(((strlen($BonkData) - 8) - 6) / 8); // BonkData - xxxxmeta - ØMETA
+ $offset = 6;
+ for ($i = 0; $i < $MetaTagEntries; $i++) {
+ $MetaEntryTagName = substr($BonkData, $offset, 4);
+ $offset += 4;
+ $MetaEntryTagOffset = getid3_lib::LittleEndian2Int(substr($BonkData, $offset, 4));
+ $offset += 4;
+ $info['bonk']['META']['tags'][$MetaEntryTagName] = $MetaEntryTagOffset;
+ }
+ break;
+
+ case ' ID3':
+ $info['audio']['encoder'] = 'Extended BONK v0.9+';
+
+ // ID3v2 checking is optional
+ if (class_exists('getid3_id3v2')) {
+ $getid3_temp = new getID3();
+ $getid3_temp->openfile($this->getid3->filename);
+ $getid3_id3v2 = new getid3_id3v2($getid3_temp);
+ $getid3_id3v2->StartingOffset = $info['bonk'][' ID3']['offset'] + 2;
+ $info['bonk'][' ID3']['valid'] = $getid3_id3v2->Analyze();
+ if ($info['bonk'][' ID3']['valid']) {
+ $info['id3v2'] = $getid3_temp->info['id3v2'];
+ }
+ unset($getid3_temp, $getid3_id3v2);
+ }
+ break;
+
+ default:
+ $this->warning('Unexpected Bonk tag "'.$BonkTagName.'" at offset '.$info['bonk'][$BonkTagName]['offset']);
+ break;
+
+ }
+ }
+
+ public static function BonkIsValidTagName($PossibleBonkTag, $ignorecase=false) {
+ static $BonkIsValidTagName = array('BONK', 'INFO', ' ID3', 'META');
+ foreach ($BonkIsValidTagName as $validtagname) {
+ if ($validtagname == $PossibleBonkTag) {
+ return true;
+ } elseif ($ignorecase && (strtolower($validtagname) == strtolower($PossibleBonkTag))) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+}
scripts.mit.edu / autoinstallsdev / mediawiki.git / blobdiff