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Diffstat (limited to 'modules/getid3/module.audio.bonk.php')
| -rw-r--r-- | modules/getid3/module.audio.bonk.php | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/modules/getid3/module.audio.bonk.php b/modules/getid3/module.audio.bonk.php new file mode 100644 index 00000000..770f67ba --- /dev/null +++ b/modules/getid3/module.audio.bonk.php @@ -0,0 +1,235 @@ +<?php +// +----------------------------------------------------------------------+
+// | PHP version 5 |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 2002-2006 James Heinrich, Allan Hansen |
+// +----------------------------------------------------------------------+
+// | This source file is subject to version 2 of the GPL license, |
+// | that is bundled with this package in the file license.txt and is |
+// | available through the world-wide-web at the following url: |
+// | http://www.gnu.org/copyleft/gpl.html | +// +----------------------------------------------------------------------+ +// | getID3() - http://getid3.sourceforge.net or http://www.getid3.org | +// +----------------------------------------------------------------------+
+// | Authors: James Heinrich <infoØgetid3*org> |
+// | Allan Hansen <ahØartemis*dk> |
+// +----------------------------------------------------------------------+ +// | module.audio.bonk.php | +// | Module for analyzing BONK audio files | +// | dependencies: module.tag.id3v2.php (optional) | +// +----------------------------------------------------------------------+
+//
+// $Id: module.audio.bonk.php,v 1.3 2006/11/02 10:48:01 ah Exp $ + + + +class getid3_bonk extends getid3_handler +{ + + public function Analyze() { + + $getid3 = $this->getid3; + + $getid3->info['bonk'] = array (); + $info_bonk = &$getid3->info['bonk']; + + $info_bonk['dataoffset'] = $getid3->info['avdataoffset']; + $info_bonk['dataend'] = $getid3->info['avdataend']; + + + // Scan-from-end method, for v0.6 and higher + fseek($getid3->fp, $info_bonk['dataend'] - 8, SEEK_SET); + $possible_bonk_tag = fread($getid3->fp, 8); + while (getid3_bonk::BonkIsValidTagName(substr($possible_bonk_tag, 4, 4), true)) { + $bonk_tag_size = getid3_lib::LittleEndian2Int(substr($possible_bonk_tag, 0, 4)); + fseek($getid3->fp, 0 - $bonk_tag_size, SEEK_CUR); + $bonk_tag_offset = ftell($getid3->fp); + $tag_header_test = fread($getid3->fp, 5); + if (($tag_header_test{0} != "\x00") || (substr($possible_bonk_tag, 4, 4) != strtolower(substr($possible_bonk_tag, 4, 4)))) { + throw new getid3_exception('Expecting "Ø'.strtoupper(substr($possible_bonk_tag, 4, 4)).'" at offset '.$bonk_tag_offset.', found "'.$tag_header_test.'"'); + } + $bonk_tag_name = substr($tag_header_test, 1, 4); + + $info_bonk[$bonk_tag_name]['size'] = $bonk_tag_size; + $info_bonk[$bonk_tag_name]['offset'] = $bonk_tag_offset; + $this->HandleBonkTags($bonk_tag_name); + + $next_tag_end_offset = $bonk_tag_offset - 8; + if ($next_tag_end_offset < $info_bonk['dataoffset']) { + if (empty($getid3->info['audio']['encoder'])) { + $getid3->info['audio']['encoder'] = 'Extended BONK v0.9+'; + } + return true; + } + fseek($getid3->fp, $next_tag_end_offset, SEEK_SET); + $possible_bonk_tag = fread($getid3->fp, 8); + } + + // Seek-from-beginning method for v0.4 and v0.5 + if (empty($info_bonk['BONK'])) { + fseek($getid3->fp, $info_bonk['dataoffset'], SEEK_SET); + do { + $tag_header_test = fread($getid3->fp, 5); + switch ($tag_header_test) { + case "\x00".'BONK': + if (empty($getid3->info['audio']['encoder'])) { + $getid3->info['audio']['encoder'] = 'BONK v0.4'; + } + break; + + case "\x00".'INFO': + $getid3->info['audio']['encoder'] = 'Extended BONK v0.5'; + break; + + default: + break 2; + } + $bonk_tag_name = substr($tag_header_test, 1, 4); + $info_bonk[$bonk_tag_name]['size'] = $info_bonk['dataend'] - $info_bonk['dataoffset']; + $info_bonk[$bonk_tag_name]['offset'] = $info_bonk['dataoffset']; + $this->HandleBonkTags($bonk_tag_name); + + } while (true); + } + + + // Parse META block for v0.6 - v0.8 + if (!@$info_bonk['INFO'] && isset($info_bonk['META']['tags']['info'])) { + fseek($getid3->fp, $info_bonk['META']['tags']['info'], SEEK_SET); + $tag_header_test = fread($getid3->fp, 5); + if ($tag_header_test == "\x00".'INFO') { + $getid3->info['audio']['encoder'] = 'Extended BONK v0.6 - v0.8'; + + $bonk_tag_name = substr($tag_header_test, 1, 4); + $info_bonk[$bonk_tag_name]['size'] = $info_bonk['dataend'] - $info_bonk['dataoffset']; + $info_bonk[$bonk_tag_name]['offset'] = $info_bonk['dataoffset']; + $this->HandleBonkTags($bonk_tag_name); + } + } + + if (empty($getid3->info['audio']['encoder'])) { + $getid3->info['audio']['encoder'] = 'Extended BONK v0.9+'; + } + if (empty($info_bonk['BONK'])) { + unset($getid3->info['bonk']); + } + return true; + + } + + + + private function HandleBonkTags(&$bonk_tag_name) { + + // Shortcut to getid3 pointer + $getid3 = $this->getid3; + $info_audio = &$getid3->info['audio']; + + switch ($bonk_tag_name) { + + case 'BONK': + // shortcut + $info_bonk_BONK = &$getid3->info['bonk']['BONK']; + + $bonk_data = "\x00".'BONK'.fread($getid3->fp, 17); + + getid3_lib::ReadSequence('LittleEndian2Int', $info_bonk_BONK, $bonk_data, 5, + array ( + 'version' => 1, + 'number_samples' => 4, + 'sample_rate' => 4, + 'channels' => 1, + 'lossless' => 1, + 'joint_stereo' => 1, + 'number_taps' => 2, + 'downsampling_ratio' => 1, + 'samples_per_packet' => 2 + ) + ); + + $info_bonk_BONK['lossless'] = (bool)$info_bonk_BONK['lossless']; + $info_bonk_BONK['joint_stereo'] = (bool)$info_bonk_BONK['joint_stereo']; + + $getid3->info['avdataoffset'] = $info_bonk_BONK['offset'] + 5 + 17; + $getid3->info['avdataend'] = $info_bonk_BONK['offset'] + $info_bonk_BONK['size']; + + $getid3->info['fileformat'] = 'bonk'; + $info_audio['dataformat'] = 'bonk'; + $info_audio['bitrate_mode'] = 'vbr'; // assumed + $info_audio['channels'] = $info_bonk_BONK['channels']; + $info_audio['sample_rate'] = $info_bonk_BONK['sample_rate']; + $info_audio['channelmode'] = $info_bonk_BONK['joint_stereo'] ? 'joint stereo' : 'stereo'; + $info_audio['lossless'] = $info_bonk_BONK['lossless']; + $info_audio['codec'] = 'bonk'; + + $getid3->info['playtime_seconds'] = $info_bonk_BONK['number_samples'] / ($info_bonk_BONK['sample_rate'] * $info_bonk_BONK['channels']); + if ($getid3->info['playtime_seconds'] > 0) { + $info_audio['bitrate'] = (($getid3->info['bonk']['dataend'] - $getid3->info['bonk']['dataoffset']) * 8) / $getid3->info['playtime_seconds']; + } + break; + + case 'INFO': + // shortcut + $info_bonk_INFO = &$getid3->info['bonk']['INFO']; + + $info_bonk_INFO['version'] = getid3_lib::LittleEndian2Int(fread($getid3->fp, 1)); + $info_bonk_INFO['entries_count'] = 0; + $next_info_data_pair = fread($getid3->fp, 5); + if (!getid3_bonk::BonkIsValidTagName(substr($next_info_data_pair, 1, 4))) { + while (!feof($getid3->fp)) { + $next_info_data_pair = fread($getid3->fp, 5); + if (getid3_bonk::BonkIsValidTagName(substr($next_info_data_pair, 1, 4))) { + fseek($getid3->fp, -5, SEEK_CUR); + break; + } + $info_bonk_INFO['entries_count']++; + } + } + break; + + case 'META': + $bonk_data = "\x00".'META'.fread($getid3->fp, $getid3->info['bonk']['META']['size'] - 5); + $getid3->info['bonk']['META']['version'] = getid3_lib::LittleEndian2Int(substr($bonk_data, 5, 1)); + + $meta_tag_entries = floor(((strlen($bonk_data) - 8) - 6) / 8); // BonkData - xxxxmeta - ØMETA + $offset = 6; + for ($i = 0; $i < $meta_tag_entries; $i++) { + $meta_entry_tag_name = substr($bonk_data, $offset, 4); + $offset += 4; + $meta_entry_tag_offset = getid3_lib::LittleEndian2Int(substr($bonk_data, $offset, 4)); + $offset += 4; + $getid3->info['bonk']['META']['tags'][$meta_entry_tag_name] = $meta_entry_tag_offset; + } + break; + + case ' ID3': + $info_audio['encoder'] = 'Extended BONK v0.9+'; + + // ID3v2 checking is optional + if (class_exists('getid3_id3v2')) { + + $id3v2 = new getid3_id3v2($getid3); + $id3v2->option_starting_offset = $getid3->info['bonk'][' ID3']['offset'] + 2; + $getid3->info['bonk'][' ID3']['valid'] = $id3v2->Analyze(); + } + break; + + default: + $getid3->warning('Unexpected Bonk tag "'.$bonk_tag_name.'" at offset '.$getid3->info['bonk'][$bonk_tag_name]['offset']); + break; + + } + } + + + + public static function BonkIsValidTagName($possible_bonk_tag, $ignore_case=false) { + + $ignore_case = $ignore_case ? 'i' : ''; + return preg_match('/^(BONK|INFO| ID3|META)$/'.$ignore_case, $possible_bonk_tag); + } + +} + + +?>
\ No newline at end of file |