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author | Karl 'vollmerk' Vollmer <vollmer@ampache.org> | 2007-04-23 07:31:05 +0000 |
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committer | Karl 'vollmerk' Vollmer <vollmer@ampache.org> | 2007-04-23 07:31:05 +0000 |
commit | a31560aec4f004e58930277758f5412d86c62adc (patch) | |
tree | 845ff6947d26b22a0f4527901dbefc97bca89d78 /modules/getid3/module.audio-video.nsv.php | |
parent | 8b27d66add7ca9ba57d7e9488612cb54be4b11c1 (diff) | |
download | ampache-a31560aec4f004e58930277758f5412d86c62adc.tar.gz ampache-a31560aec4f004e58930277758f5412d86c62adc.tar.bz2 ampache-a31560aec4f004e58930277758f5412d86c62adc.zip |
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.php | 210 |
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 new file mode 100644 index 00000000..0ff8e75c --- /dev/null +++ b/modules/getid3/module.audio-video.nsv.php @@ -0,0 +1,210 @@ +<?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); + } + +} + + +?>
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