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-rw-r--r--getid3/module.audio-video.nsv.php224
1 files changed, 224 insertions, 0 deletions
diff --git a/getid3/module.audio-video.nsv.php b/getid3/module.audio-video.nsv.php
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+++ b/getid3/module.audio-video.nsv.php
@@ -0,0 +1,224 @@
+<?php
+/////////////////////////////////////////////////////////////////
+/// getID3() by James Heinrich <info@getid3.org> //
+// available at http://getid3.sourceforge.net //
+// or http://www.getid3.org //
+/////////////////////////////////////////////////////////////////
+// See readme.txt for more details //
+/////////////////////////////////////////////////////////////////
+// //
+// module.audio.nsv.php //
+// module for analyzing Nullsoft NSV files //
+// dependencies: NONE //
+// ///
+/////////////////////////////////////////////////////////////////
+
+
+class getid3_nsv
+{
+
+ function getid3_nsv(&$fd, &$ThisFileInfo) {
+
+ fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET);
+ $NSVheader = fread($fd, 4);
+
+ switch ($NSVheader) {
+ case 'NSVs':
+ if ($this->getNSVsHeaderFilepointer($fd, $ThisFileInfo, 0)) {
+ $ThisFileInfo['fileformat'] = 'nsv';
+ $ThisFileInfo['audio']['dataformat'] = 'nsv';
+ $ThisFileInfo['video']['dataformat'] = 'nsv';
+ $ThisFileInfo['audio']['lossless'] = false;
+ $ThisFileInfo['video']['lossless'] = false;
+ }
+ break;
+
+ case 'NSVf':
+ if ($this->getNSVfHeaderFilepointer($fd, $ThisFileInfo, 0)) {
+ $ThisFileInfo['fileformat'] = 'nsv';
+ $ThisFileInfo['audio']['dataformat'] = 'nsv';
+ $ThisFileInfo['video']['dataformat'] = 'nsv';
+ $ThisFileInfo['audio']['lossless'] = false;
+ $ThisFileInfo['video']['lossless'] = false;
+ $this->getNSVsHeaderFilepointer($fd, $ThisFileInfo, $ThisFileInfo['nsv']['NSVf']['header_length']);
+ }
+ break;
+
+ default:
+ $ThisFileInfo['error'][] = 'Expecting "NSVs" or "NSVf" at offset '.$ThisFileInfo['avdataoffset'].', found "'.$NSVheader.'"';
+ return false;
+ break;
+ }
+
+ if (!isset($ThisFileInfo['nsv']['NSVf'])) {
+ $ThisFileInfo['warning'][] = 'NSVf header not present - cannot calculate playtime or bitrate';
+ }
+
+ return true;
+ }
+
+ function getNSVsHeaderFilepointer(&$fd, &$ThisFileInfo, $fileoffset) {
+ fseek($fd, $fileoffset, SEEK_SET);
+ $NSVsheader = fread($fd, 28);
+ $offset = 0;
+
+ $ThisFileInfo['nsv']['NSVs']['identifier'] = substr($NSVsheader, $offset, 4);
+ $offset += 4;
+
+ if ($ThisFileInfo['nsv']['NSVs']['identifier'] != 'NSVs') {
+ $ThisFileInfo['error'][] = 'expected "NSVs" at offset ('.$fileoffset.'), found "'.$ThisFileInfo['nsv']['NSVs']['identifier'].'" instead';
+ unset($ThisFileInfo['nsv']['NSVs']);
+ return false;
+ }
+
+ $ThisFileInfo['nsv']['NSVs']['offset'] = $fileoffset;
+
+ $ThisFileInfo['nsv']['NSVs']['video_codec'] = substr($NSVsheader, $offset, 4);
+ $offset += 4;
+ $ThisFileInfo['nsv']['NSVs']['audio_codec'] = substr($NSVsheader, $offset, 4);
+ $offset += 4;
+ $ThisFileInfo['nsv']['NSVs']['resolution_x'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 2));
+ $offset += 2;
+ $ThisFileInfo['nsv']['NSVs']['resolution_y'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 2));
+ $offset += 2;
+
+ $ThisFileInfo['nsv']['NSVs']['framerate_index'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1));
+ $offset += 1;
+ //$ThisFileInfo['nsv']['NSVs']['unknown1b'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1));
+ $offset += 1;
+ //$ThisFileInfo['nsv']['NSVs']['unknown1c'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1));
+ $offset += 1;
+ //$ThisFileInfo['nsv']['NSVs']['unknown1d'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1));
+ $offset += 1;
+ //$ThisFileInfo['nsv']['NSVs']['unknown2a'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1));
+ $offset += 1;
+ //$ThisFileInfo['nsv']['NSVs']['unknown2b'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1));
+ $offset += 1;
+ //$ThisFileInfo['nsv']['NSVs']['unknown2c'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1));
+ $offset += 1;
+ //$ThisFileInfo['nsv']['NSVs']['unknown2d'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1));
+ $offset += 1;
+
+ switch ($ThisFileInfo['nsv']['NSVs']['audio_codec']) {
+ case 'PCM ':
+ $ThisFileInfo['nsv']['NSVs']['bits_channel'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1));
+ $offset += 1;
+ $ThisFileInfo['nsv']['NSVs']['channels'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1));
+ $offset += 1;
+ $ThisFileInfo['nsv']['NSVs']['sample_rate'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 2));
+ $offset += 2;
+
+ $ThisFileInfo['audio']['sample_rate'] = $ThisFileInfo['nsv']['NSVs']['sample_rate'];
+ break;
+
+ case 'MP3 ':
+ case 'NONE':
+ default:
+ //$ThisFileInfo['nsv']['NSVs']['unknown3'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 4));
+ $offset += 4;
+ break;
+ }
+
+ $ThisFileInfo['video']['resolution_x'] = $ThisFileInfo['nsv']['NSVs']['resolution_x'];
+ $ThisFileInfo['video']['resolution_y'] = $ThisFileInfo['nsv']['NSVs']['resolution_y'];
+ $ThisFileInfo['nsv']['NSVs']['frame_rate'] = $this->NSVframerateLookup($ThisFileInfo['nsv']['NSVs']['framerate_index']);
+ $ThisFileInfo['video']['frame_rate'] = $ThisFileInfo['nsv']['NSVs']['frame_rate'];
+ $ThisFileInfo['video']['bits_per_sample'] = 24;
+ $ThisFileInfo['video']['pixel_aspect_ratio'] = (float) 1;
+
+ return true;
+ }
+
+ function getNSVfHeaderFilepointer(&$fd, &$ThisFileInfo, $fileoffset, $getTOCoffsets=false) {
+ fseek($fd, $fileoffset, SEEK_SET);
+ $NSVfheader = fread($fd, 28);
+ $offset = 0;
+
+ $ThisFileInfo['nsv']['NSVf']['identifier'] = substr($NSVfheader, $offset, 4);
+ $offset += 4;
+
+ if ($ThisFileInfo['nsv']['NSVf']['identifier'] != 'NSVf') {
+ $ThisFileInfo['error'][] = 'expected "NSVf" at offset ('.$fileoffset.'), found "'.$ThisFileInfo['nsv']['NSVf']['identifier'].'" instead';
+ unset($ThisFileInfo['nsv']['NSVf']);
+ return false;
+ }
+
+ $ThisFileInfo['nsv']['NSVs']['offset'] = $fileoffset;
+
+ $ThisFileInfo['nsv']['NSVf']['header_length'] = getid3_lib::LittleEndian2Int(substr($NSVfheader, $offset, 4));
+ $offset += 4;
+ $ThisFileInfo['nsv']['NSVf']['file_size'] = getid3_lib::LittleEndian2Int(substr($NSVfheader, $offset, 4));
+ $offset += 4;
+
+ if ($ThisFileInfo['nsv']['NSVf']['file_size'] > $ThisFileInfo['avdataend']) {
+ $ThisFileInfo['warning'][] = 'truncated file - NSVf header indicates '.$ThisFileInfo['nsv']['NSVf']['file_size'].' bytes, file actually '.$ThisFileInfo['avdataend'].' bytes';
+ }
+
+ $ThisFileInfo['nsv']['NSVf']['playtime_ms'] = getid3_lib::LittleEndian2Int(substr($NSVfheader, $offset, 4));
+ $offset += 4;
+ $ThisFileInfo['nsv']['NSVf']['meta_size'] = getid3_lib::LittleEndian2Int(substr($NSVfheader, $offset, 4));
+ $offset += 4;
+ $ThisFileInfo['nsv']['NSVf']['TOC_entries_1'] = getid3_lib::LittleEndian2Int(substr($NSVfheader, $offset, 4));
+ $offset += 4;
+ $ThisFileInfo['nsv']['NSVf']['TOC_entries_2'] = getid3_lib::LittleEndian2Int(substr($NSVfheader, $offset, 4));
+ $offset += 4;
+
+ if ($ThisFileInfo['nsv']['NSVf']['playtime_ms'] == 0) {
+ $ThisFileInfo['error'][] = 'Corrupt NSV file: NSVf.playtime_ms == zero';
+ return false;
+ }
+
+ $NSVfheader .= fread($fd, $ThisFileInfo['nsv']['NSVf']['meta_size'] + (4 * $ThisFileInfo['nsv']['NSVf']['TOC_entries_1']) + (4 * $ThisFileInfo['nsv']['NSVf']['TOC_entries_2']));
+ $NSVfheaderlength = strlen($NSVfheader);
+ $ThisFileInfo['nsv']['NSVf']['metadata'] = substr($NSVfheader, $offset, $ThisFileInfo['nsv']['NSVf']['meta_size']);
+ $offset += $ThisFileInfo['nsv']['NSVf']['meta_size'];
+
+ if ($getTOCoffsets) {
+ $TOCcounter = 0;
+ while ($TOCcounter < $ThisFileInfo['nsv']['NSVf']['TOC_entries_1']) {
+ if ($TOCcounter < $ThisFileInfo['nsv']['NSVf']['TOC_entries_1']) {
+ $ThisFileInfo['nsv']['NSVf']['TOC_1'][$TOCcounter] = getid3_lib::LittleEndian2Int(substr($NSVfheader, $offset, 4));
+ $offset += 4;
+ $TOCcounter++;
+ }
+ }
+ }
+
+ if (trim($ThisFileInfo['nsv']['NSVf']['metadata']) != '') {
+ $ThisFileInfo['nsv']['NSVf']['metadata'] = str_replace('`', "\x01", $ThisFileInfo['nsv']['NSVf']['metadata']);
+ $CommentPairArray = explode("\x01".' ', $ThisFileInfo['nsv']['NSVf']['metadata']);
+ foreach ($CommentPairArray as $CommentPair) {
+ if (strstr($CommentPair, '='."\x01")) {
+ list($key, $value) = explode('='."\x01", $CommentPair, 2);
+ $ThisFileInfo['nsv']['comments'][strtolower($key)][] = trim(str_replace("\x01", '', $value));
+ }
+ }
+ }
+
+ $ThisFileInfo['playtime_seconds'] = $ThisFileInfo['nsv']['NSVf']['playtime_ms'] / 1000;
+ $ThisFileInfo['bitrate'] = ($ThisFileInfo['nsv']['NSVf']['file_size'] * 8) / $ThisFileInfo['playtime_seconds'];
+
+ return true;
+ }
+
+
+ function NSVframerateLookup($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);
+ }
+
+}
+
+
+?> \ No newline at end of file
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-14 16:57:08 +0000