name : module.audio-video.nsv.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.nsv.php // // module for analyzing Nullsoft NSV files // // dependencies: NONE // // /// ///////////////////////////////////////////////////////////////// if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers exit; } class getid3_nsv extends getid3_handler { /** * @return bool */ public function Analyze() { $info = &$this->getid3->info; $this->fseek($info['avdataoffset']); $NSVheader = $this->fread(4); switch ($NSVheader) { case 'NSVs': if ($this->getNSVsHeaderFilepointer(0)) { $info['fileformat'] = 'nsv'; $info['audio']['dataformat'] = 'nsv'; $info['video']['dataformat'] = 'nsv'; $info['audio']['lossless'] = false; $info['video']['lossless'] = false; } break; case 'NSVf': if ($this->getNSVfHeaderFilepointer(0)) { $info['fileformat'] = 'nsv'; $info['audio']['dataformat'] = 'nsv'; $info['video']['dataformat'] = 'nsv'; $info['audio']['lossless'] = false; $info['video']['lossless'] = false; $this->getNSVsHeaderFilepointer($info['nsv']['NSVf']['header_length']); } break; default: $this->error('Expecting "NSVs" or "NSVf" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes($NSVheader).'"'); return false; } if (!isset($info['nsv']['NSVf'])) { $this->warning('NSVf header not present - cannot calculate playtime or bitrate'); } return true; } /** * @param int $fileoffset * * @return bool */ public function getNSVsHeaderFilepointer($fileoffset) { $info = &$this->getid3->info; $this->fseek($fileoffset); $NSVsheader = $this->fread(28); $offset = 0; $info['nsv']['NSVs']['identifier'] = substr($NSVsheader, $offset, 4); $offset += 4; if ($info['nsv']['NSVs']['identifier'] != 'NSVs') { $this->error('expected "NSVs" at offset ('.$fileoffset.'), found "'.$info['nsv']['NSVs']['identifier'].'" instead'); unset($info['nsv']['NSVs']); return false; } $info['nsv']['NSVs']['offset'] = $fileoffset; $info['nsv']['NSVs']['video_codec'] = substr($NSVsheader, $offset, 4); $offset += 4; $info['nsv']['NSVs']['audio_codec'] = substr($NSVsheader, $offset, 4); $offset += 4; $info['nsv']['NSVs']['resolution_x'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 2)); $offset += 2; $info['nsv']['NSVs']['resolution_y'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 2)); $offset += 2; $info['nsv']['NSVs']['framerate_index'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1)); $offset += 1; //$info['nsv']['NSVs']['unknown1b'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1)); $offset += 1; //$info['nsv']['NSVs']['unknown1c'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1)); $offset += 1; //$info['nsv']['NSVs']['unknown1d'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1)); $offset += 1; //$info['nsv']['NSVs']['unknown2a'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1)); $offset += 1; //$info['nsv']['NSVs']['unknown2b'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1)); $offset += 1; //$info['nsv']['NSVs']['unknown2c'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1)); $offset += 1; //$info['nsv']['NSVs']['unknown2d'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1)); $offset += 1; switch ($info['nsv']['NSVs']['audio_codec']) { case 'PCM ': $info['nsv']['NSVs']['bits_channel'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1)); $offset += 1; $info['nsv']['NSVs']['channels'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1)); $offset += 1; $info['nsv']['NSVs']['sample_rate'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 2)); $offset += 2; $info['audio']['sample_rate'] = $info['nsv']['NSVs']['sample_rate']; break; case 'MP3 ': case 'NONE': default: //$info['nsv']['NSVs']['unknown3'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 4)); $offset += 4; break; } $info['video']['resolution_x'] = $info['nsv']['NSVs']['resolution_x']; $info['video']['resolution_y'] = $info['nsv']['NSVs']['resolution_y']; $info['nsv']['NSVs']['frame_rate'] = $this->NSVframerateLookup($info['nsv']['NSVs']['framerate_index']); $info['video']['frame_rate'] = $info['nsv']['NSVs']['frame_rate']; $info['video']['bits_per_sample'] = 24; $info['video']['pixel_aspect_ratio'] = (float) 1; return true; } /** * @param int $fileoffset * @param bool $getTOCoffsets * * @return bool */ public function getNSVfHeaderFilepointer($fileoffset, $getTOCoffsets=false) { $info = &$this->getid3->info; $this->fseek($fileoffset); $NSVfheader = $this->fread(28); $offset = 0; $info['nsv']['NSVf']['identifier'] = substr($NSVfheader, $offset, 4); $offset += 4; if ($info['nsv']['NSVf']['identifier'] != 'NSVf') { $this->error('expected "NSVf" at offset ('.$fileoffset.'), found "'.$info['nsv']['NSVf']['identifier'].'" instead'); unset($info['nsv']['NSVf']); return false; } $info['nsv']['NSVs']['offset'] = $fileoffset; $info['nsv']['NSVf']['header_length'] = getid3_lib::LittleEndian2Int(substr($NSVfheader, $offset, 4)); $offset += 4; $info['nsv']['NSVf']['file_size'] = getid3_lib::LittleEndian2Int(substr($NSVfheader, $offset, 4)); $offset += 4; if ($info['nsv']['NSVf']['file_size'] > $info['avdataend']) { $this->warning('truncated file - NSVf header indicates '.$info['nsv']['NSVf']['file_size'].' bytes, file actually '.$info['avdataend'].' bytes'); } $info['nsv']['NSVf']['playtime_ms'] = getid3_lib::LittleEndian2Int(substr($NSVfheader, $offset, 4)); $offset += 4; $info['nsv']['NSVf']['meta_size'] = getid3_lib::LittleEndian2Int(substr($NSVfheader, $offset, 4)); $offset += 4; $info['nsv']['NSVf']['TOC_entries_1'] = getid3_lib::LittleEndian2Int(substr($NSVfheader, $offset, 4)); $offset += 4; $info['nsv']['NSVf']['TOC_entries_2'] = getid3_lib::LittleEndian2Int(substr($NSVfheader, $offset, 4)); $offset += 4; if ($info['nsv']['NSVf']['playtime_ms'] == 0) { $this->error('Corrupt NSV file: NSVf.playtime_ms == zero'); return false; } $NSVfheader .= $this->fread($info['nsv']['NSVf']['meta_size'] + (4 * $info['nsv']['NSVf']['TOC_entries_1']) + (4 * $info['nsv']['NSVf']['TOC_entries_2'])); $NSVfheaderlength = strlen($NSVfheader); $info['nsv']['NSVf']['metadata'] = substr($NSVfheader, $offset, $info['nsv']['NSVf']['meta_size']); $offset += $info['nsv']['NSVf']['meta_size']; if ($getTOCoffsets) { $TOCcounter = 0; while ($TOCcounter < $info['nsv']['NSVf']['TOC_entries_1']) { if ($TOCcounter < $info['nsv']['NSVf']['TOC_entries_1']) { $info['nsv']['NSVf']['TOC_1'][$TOCcounter] = getid3_lib::LittleEndian2Int(substr($NSVfheader, $offset, 4)); $offset += 4; $TOCcounter++; } } } if (trim($info['nsv']['NSVf']['metadata']) != '') { $info['nsv']['NSVf']['metadata'] = str_replace('`', "\x01", $info['nsv']['NSVf']['metadata']); $CommentPairArray = explode("\x01".' ', $info['nsv']['NSVf']['metadata']); foreach ($CommentPairArray as $CommentPair) { if (strstr($CommentPair, '='."\x01")) { list($key, $value) = explode('='."\x01", $CommentPair, 2); $info['nsv']['comments'][strtolower($key)][] = trim(str_replace("\x01", '', $value)); } } } $info['playtime_seconds'] = $info['nsv']['NSVf']['playtime_ms'] / 1000; $info['bitrate'] = getid3_lib::SafeDiv($info['nsv']['NSVf']['file_size'] * 8, $info['playtime_seconds']); return true; } /** * @param int $framerateindex * * @return float|false */ public static function NSVframerateLookup($framerateindex) { if ($framerateindex <= 127) { return (float) $framerateindex; } static $NSVframerateLookup = array(); if (empty($NSVframerateLookup)) { $NSVframerateLookup[129] = 29.970; $NSVframerateLookup[131] = 23.976; $NSVframerateLookup[133] = 14.985; $NSVframerateLookup[197] = 59.940; $NSVframerateLookup[199] = 47.952; } return (isset($NSVframerateLookup[$framerateindex]) ? $NSVframerateLookup[$framerateindex] : false); } }