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authorKarl 'vollmerk' Vollmer <vollmer@ampache.org>2007-04-23 07:31:05 +0000
committerKarl 'vollmerk' Vollmer <vollmer@ampache.org>2007-04-23 07:31:05 +0000
commita31560aec4f004e58930277758f5412d86c62adc (patch)
tree845ff6947d26b22a0f4527901dbefc97bca89d78 /modules/getid3/module.audio-video.nsv.php
parent8b27d66add7ca9ba57d7e9488612cb54be4b11c1 (diff)
downloadampache-a31560aec4f004e58930277758f5412d86c62adc.tar.gz
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it technically logs in and streams.. but thats it, complete rewrite almost everything broken
Diffstat (limited to 'modules/getid3/module.audio-video.nsv.php')
-rw-r--r--modules/getid3/module.audio-video.nsv.php210
1 files changed, 210 insertions, 0 deletions
diff --git a/modules/getid3/module.audio-video.nsv.php b/modules/getid3/module.audio-video.nsv.php
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+<?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-video.nsv.php |
+// | module for analyzing Nullsoft NSV files |
+// | dependencies: NONE |
+// +----------------------------------------------------------------------+
+//
+// $Id: module.audio-video.nsv.php,v 1.3 2006/11/02 10:48:00 ah Exp $
+
+
+
+class getid3_nsv extends getid3_handler
+{
+
+ public function Analyze() {
+
+ $getid3 = $this->getid3;
+
+ $getid3->info['fileformat'] = 'nsv';
+ $getid3->info['audio']['dataformat'] = 'nsv';
+ $getid3->info['video']['dataformat'] = 'nsv';
+ $getid3->info['audio']['lossless'] = false;
+ $getid3->info['video']['lossless'] = false;
+
+ fseek($getid3->fp, $getid3->info['avdataoffset'], SEEK_SET);
+ $nsv_header = fread($getid3->fp, 4);
+
+ switch ($nsv_header) {
+
+ case 'NSVs':
+ $this->getNSVsHeader();
+ break;
+
+ case 'NSVf':
+ if ($this->getNSVfHeader()) {
+ $this->getNSVsHeader($getid3->info['nsv']['NSVf']['header_length']);
+ }
+ break;
+
+ default:
+ throw new getid3_exception('Expecting "NSVs" or "NSVf" at offset '.$getid3->info['avdataoffset'].', found "'.$nsv_header.'"');
+ break;
+ }
+
+ if (!isset($getid3->info['nsv']['NSVf'])) {
+ $getid3->warning('NSVf header not present - cannot calculate playtime or bitrate');
+ }
+
+ return true;
+ }
+
+
+
+ private function getNSVsHeader($file_offset = 0) {
+
+ $getid3 = $this->getid3;
+
+ fseek($getid3->fp, $file_offset, SEEK_SET);
+ $nsvs_header = fread($getid3->fp, 28);
+
+ $getid3->info['nsv']['NSVs'] = array ();
+ $info_nsv_NSVs = &$getid3->info['nsv']['NSVs'];
+
+ $info_nsv_NSVs['identifier'] = substr($nsvs_header, 0, 4);
+ if ($info_nsv_NSVs['identifier'] != 'NSVs') {
+ throw new getid3_exception('expected "NSVs" at offset ('.$file_offset.'), found "'.$info_nsv_NSVs['identifier'].'" instead');
+ }
+
+ $info_nsv_NSVs['offset'] = $file_offset;
+
+ getid3_lib::ReadSequence('LittleEndian2Int', $info_nsv_NSVs, $nsvs_header, 4,
+ array (
+ 'video_codec' => -4, // string
+ 'audio_codec' => -4, // string
+ 'resolution_x' => 2,
+ 'resolution_y' => 2,
+ 'framerate_index' => 1,
+ )
+ );
+
+ if ($info_nsv_NSVs['audio_codec'] == 'PCM ') {
+
+ getid3_lib::ReadSequence('LittleEndian2Int', $info_nsv_NSVs, $nsvs_header, 24,
+ array (
+ 'bits_channel' => 1,
+ 'channels' => 1,
+ 'sample_rate' => 2
+ )
+ );
+ $getid3->info['audio']['sample_rate'] = $info_nsv_NSVs['sample_rate'];
+
+ }
+
+ $getid3->info['video']['resolution_x'] = $info_nsv_NSVs['resolution_x'];
+ $getid3->info['video']['resolution_y'] = $info_nsv_NSVs['resolution_y'];
+ $info_nsv_NSVs['frame_rate'] = getid3_nsv::NSVframerateLookup($info_nsv_NSVs['framerate_index']);
+ $getid3->info['video']['frame_rate'] = $info_nsv_NSVs['frame_rate'];
+ $getid3->info['video']['bits_per_sample'] = 24;
+ $getid3->info['video']['pixel_aspect_ratio'] = (float)1;
+
+ return true;
+ }
+
+
+
+ private function getNSVfHeader($file_offset = 0, $get_toc_offsets=false) {
+
+ $getid3 = $this->getid3;
+
+ fseek($getid3->fp, $file_offset, SEEK_SET);
+ $nsvf_header = fread($getid3->fp, 28);
+
+ $getid3->info['nsv']['NSVf'] = array ();
+ $info_nsv_NSVf = &$getid3->info['nsv']['NSVf'];
+
+ $info_nsv_NSVf['identifier'] = substr($nsvf_header, 0, 4);
+ if ($info_nsv_NSVf['identifier'] != 'NSVf') {
+ throw new getid3_exception('expected "NSVf" at offset ('.$file_offset.'), found "'.$info_nsv_NSVf['identifier'].'" instead');
+ }
+
+ $getid3->info['nsv']['NSVs']['offset'] = $file_offset;
+
+ getid3_lib::ReadSequence('LittleEndian2Int', $info_nsv_NSVf, $nsvf_header, 4,
+ array (
+ 'header_length' => 4,
+ 'file_size' => 4,
+ 'playtime_ms' => 4,
+ 'meta_size' => 4,
+ 'TOC_entries_1' => 4,
+ 'TOC_entries_2' => 4
+ )
+ );
+
+ if ($info_nsv_NSVf['playtime_ms'] == 0) {
+ throw new getid3_exception('Corrupt NSV file: NSVf.playtime_ms == zero');
+ }
+
+ if ($info_nsv_NSVf['file_size'] > $getid3->info['avdataend']) {
+ $getid3->warning('truncated file - NSVf header indicates '.$info_nsv_NSVf['file_size'].' bytes, file actually '.$getid3->info['avdataend'].' bytes');
+ }
+
+ $nsvf_header .= fread($getid3->fp, $info_nsv_NSVf['meta_size'] + (4 * $info_nsv_NSVf['TOC_entries_1']) + (4 * $info_nsv_NSVf['TOC_entries_2']));
+ $nsvf_headerlength = strlen($nsvf_header);
+ $info_nsv_NSVf['metadata'] = substr($nsvf_header, 28, $info_nsv_NSVf['meta_size']);
+
+ $offset = 28 + $info_nsv_NSVf['meta_size'];
+ if ($get_toc_offsets) {
+ $toc_counter = 0;
+ while ($toc_counter < $info_nsv_NSVf['TOC_entries_1']) {
+ if ($toc_counter < $info_nsv_NSVf['TOC_entries_1']) {
+ $info_nsv_NSVf['TOC_1'][$toc_counter] = getid3_lib::LittleEndian2Int(substr($nsvf_header, $offset, 4));
+ $offset += 4;
+ $toc_counter++;
+ }
+ }
+ }
+
+ if (trim($info_nsv_NSVf['metadata']) != '') {
+ $info_nsv_NSVf['metadata'] = str_replace('`', "\x01", $info_nsv_NSVf['metadata']);
+ $comment_pair_array = explode("\x01".' ', $info_nsv_NSVf['metadata']);
+ foreach ($comment_pair_array as $comment_pair) {
+ if (strstr($comment_pair, '='."\x01")) {
+ list($key, $value) = explode('='."\x01", $comment_pair, 2);
+ $getid3->info['nsv']['comments'][strtolower($key)][] = trim(str_replace("\x01", '', $value));
+ }
+ }
+ }
+
+ $getid3->info['playtime_seconds'] = $info_nsv_NSVf['playtime_ms'] / 1000;
+ $getid3->info['bitrate'] = ($info_nsv_NSVf['file_size'] * 8) / $getid3->info['playtime_seconds'];
+
+ return true;
+ }
+
+
+
+ public static function NSVframerateLookup($frame_rate_index) {
+
+ if ($frame_rate_index <= 127) {
+ return (float)$frame_rate_index;
+ }
+
+ static $lookup = array (
+ 129 => 29.970,
+ 131 => 23.976,
+ 133 => 14.985,
+ 197 => 59.940,
+ 199 => 47.952
+ );
+ return (isset($lookup[$frame_rate_index]) ? $lookup[$frame_rate_index] : false);
+ }
+
+}
+
+
+?> \ No newline at end of file