--- /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.nsv.php //
+// module for analyzing Nullsoft NSV files //
+// dependencies: NONE //
+// ///
+/////////////////////////////////////////////////////////////////
+
+
+class getid3_nsv extends getid3_handler
+{
+
+ 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($NSVheader).'"');
+ return false;
+ break;
+ }
+
+ if (!isset($info['nsv']['NSVf'])) {
+ $this->warning('NSVf header not present - cannot calculate playtime or bitrate');
+ }
+
+ return true;
+ }
+
+ public function getNSVsHeaderFilepointer($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;
+ $info['video']['pixel_aspect_ratio'] = (float) 1;
+
+ return true;
+ }
+
+ public function getNSVfHeaderFilepointer($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;
+ $info['bitrate'] = ($info['nsv']['NSVf']['file_size'] * 8) / $info['playtime_seconds'];
+
+ return true;
+ }
+
+
+ public static function NSVframerateLookup($framerateindex) {
+ if ($framerateindex <= 127) {
+ return (float) $framerateindex;
+ }
+ static $NSVframerateLookup = array();
+ if (empty($NSVframerateLookup)) {
+ $NSVframerateLookup[129] = (float) 29.970;
+ $NSVframerateLookup[131] = (float) 23.976;
+ $NSVframerateLookup[133] = (float) 14.985;
+ $NSVframerateLookup[197] = (float) 59.940;
+ $NSVframerateLookup[199] = (float) 47.952;
+ }
+ return (isset($NSVframerateLookup[$framerateindex]) ? $NSVframerateLookup[$framerateindex] : false);
+ }
+
+}
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