name : module.audio.dsf.php <?php ///////////////////////////////////////////////////////////////// /// getID3() by James Heinrich <info@getid3.org> // // 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.dsf.php // // module for analyzing dsf/DSF Audio files // // dependencies: module.tag.id3v2.php // // /// ///////////////////////////////////////////////////////////////// if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers exit; } getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.tag.id3v2.php', __FILE__, true); class getid3_dsf extends getid3_handler { /** * @return bool */ public function Analyze() { $info = &$this->getid3->info; $info['fileformat'] = 'dsf'; $info['audio']['dataformat'] = 'dsf'; $info['audio']['lossless'] = true; $info['audio']['bitrate_mode'] = 'cbr'; $this->fseek($info['avdataoffset']); $dsfheader = $this->fread(28 + 12); $headeroffset = 0; $info['dsf']['dsd']['magic'] = substr($dsfheader, $headeroffset, 4); $headeroffset += 4; $magic = 'DSD '; if ($info['dsf']['dsd']['magic'] != $magic) { $this->error('Expecting "'.getid3_lib::PrintHexBytes($magic).'" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes($info['dsf']['dsd']['magic']).'"'); unset($info['fileformat']); unset($info['audio']); unset($info['dsf']); return false; } $info['dsf']['dsd']['dsd_chunk_size'] = getid3_lib::LittleEndian2Int(substr($dsfheader, $headeroffset, 8)); // should be 28 $headeroffset += 8; $info['dsf']['dsd']['dsf_file_size'] = getid3_lib::LittleEndian2Int(substr($dsfheader, $headeroffset, 8)); $headeroffset += 8; $info['dsf']['dsd']['meta_chunk_offset'] = getid3_lib::LittleEndian2Int(substr($dsfheader, $headeroffset, 8)); $headeroffset += 8; $info['dsf']['fmt']['magic'] = substr($dsfheader, $headeroffset, 4); $headeroffset += 4; $magic = 'fmt '; if ($info['dsf']['fmt']['magic'] != $magic) { $this->error('Expecting "'.getid3_lib::PrintHexBytes($magic).'" at offset '.$headeroffset.', found "'.getid3_lib::PrintHexBytes($info['dsf']['fmt']['magic']).'"'); return false; } $info['dsf']['fmt']['fmt_chunk_size'] = getid3_lib::LittleEndian2Int(substr($dsfheader, $headeroffset, 8)); // usually 52 bytes $headeroffset += 8; $dsfheader .= $this->fread($info['dsf']['fmt']['fmt_chunk_size'] - 12 + 12); // we have already read the entire DSD chunk, plus 12 bytes of FMT. We now want to read the size of FMT, plus 12 bytes into the next chunk to get magic and size. if (strlen($dsfheader) != ($info['dsf']['dsd']['dsd_chunk_size'] + $info['dsf']['fmt']['fmt_chunk_size'] + 12)) { $this->error('Expecting '.($info['dsf']['dsd']['dsd_chunk_size'] + $info['dsf']['fmt']['fmt_chunk_size']).' bytes header, found '.strlen($dsfheader).' bytes'); return false; } $info['dsf']['fmt']['format_version'] = getid3_lib::LittleEndian2Int(substr($dsfheader, $headeroffset, 4)); // usually "1" $headeroffset += 4; $info['dsf']['fmt']['format_id'] = getid3_lib::LittleEndian2Int(substr($dsfheader, $headeroffset, 4)); // usually "0" = "DSD Raw" $headeroffset += 4; $info['dsf']['fmt']['channel_type_id'] = getid3_lib::LittleEndian2Int(substr($dsfheader, $headeroffset, 4)); $headeroffset += 4; $info['dsf']['fmt']['channels'] = getid3_lib::LittleEndian2Int(substr($dsfheader, $headeroffset, 4)); $headeroffset += 4; $info['dsf']['fmt']['sample_rate'] = getid3_lib::LittleEndian2Int(substr($dsfheader, $headeroffset, 4)); $headeroffset += 4; $info['dsf']['fmt']['bits_per_sample'] = getid3_lib::LittleEndian2Int(substr($dsfheader, $headeroffset, 4)); $headeroffset += 4; $info['dsf']['fmt']['sample_count'] = getid3_lib::LittleEndian2Int(substr($dsfheader, $headeroffset, 8)); $headeroffset += 8; $info['dsf']['fmt']['channel_block_size'] = getid3_lib::LittleEndian2Int(substr($dsfheader, $headeroffset, 4)); $headeroffset += 4; $info['dsf']['fmt']['reserved'] = getid3_lib::LittleEndian2Int(substr($dsfheader, $headeroffset, 4)); // zero-filled $headeroffset += 4; $info['dsf']['data']['magic'] = substr($dsfheader, $headeroffset, 4); $headeroffset += 4; $magic = 'data'; if ($info['dsf']['data']['magic'] != $magic) { $this->error('Expecting "'.getid3_lib::PrintHexBytes($magic).'" at offset '.$headeroffset.', found "'.getid3_lib::PrintHexBytes($info['dsf']['data']['magic']).'"'); return false; } $info['dsf']['data']['data_chunk_size'] = getid3_lib::LittleEndian2Int(substr($dsfheader, $headeroffset, 8)); $headeroffset += 8; $info['avdataoffset'] = $headeroffset; $info['avdataend'] = $info['avdataoffset'] + $info['dsf']['data']['data_chunk_size']; if ($info['dsf']['dsd']['meta_chunk_offset'] > 0) { $getid3_id3v2 = new getid3_id3v2($this->getid3); $getid3_id3v2->StartingOffset = $info['dsf']['dsd']['meta_chunk_offset']; $getid3_id3v2->Analyze(); unset($getid3_id3v2); } $info['dsf']['fmt']['channel_type'] = $this->DSFchannelTypeLookup($info['dsf']['fmt']['channel_type_id']); $info['audio']['channelmode'] = $info['dsf']['fmt']['channel_type']; $info['audio']['bits_per_sample'] = $info['dsf']['fmt']['bits_per_sample']; $info['audio']['sample_rate'] = $info['dsf']['fmt']['sample_rate']; $info['audio']['channels'] = $info['dsf']['fmt']['channels']; $info['audio']['bitrate'] = $info['audio']['bits_per_sample'] * $info['audio']['sample_rate'] * $info['audio']['channels']; $info['playtime_seconds'] = getid3_lib::SafeDiv($info['dsf']['data']['data_chunk_size'] * 8, $info['audio']['bitrate']); return true; } /** * @param int $channel_type_id * * @return string */ public static function DSFchannelTypeLookup($channel_type_id) { static $DSFchannelTypeLookup = array( // interleaving order: 1 => 'mono', // 1: Mono 2 => 'stereo', // 1: Front-Left; 2: Front-Right 3 => '3-channel', // 1: Front-Left; 2: Front-Right; 3: Center 4 => 'quad', // 1: Front-Left; 2: Front-Right; 3: Back-Left; 4: Back-Right 5 => '4-channel', // 1: Front-Left; 2: Front-Right; 3: Center; 4: Low-Frequency 6 => '5-channel', // 1: Front-Left; 2: Front-Right; 3: Center; 4: Back-Left 5: Back-Right 7 => '5.1', // 1: Front-Left; 2: Front-Right; 3: Center; 4: Low-Frequency; 5: Back-Left; 6: Back-Right ); return (isset($DSFchannelTypeLookup[$channel_type_id]) ? $DSFchannelTypeLookup[$channel_type_id] : ''); } }