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comparison e2gallerypro/e2upload/Backend/Assets/getid3/module.audio-video.nsv.php @ 3:3f6b44aa6b35 judyates

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[svn r4] added ability to buy stuff, from a Prints page, but it doesn't work well with the css, and it also has not been fitted into the perl make system.
author rlm
date Mon, 22 Feb 2010 08:02:39 -0500
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2:670229c4eb4b 3:3f6b44aa6b35
1 <?php
2 // +----------------------------------------------------------------------+
3 // | PHP version 5 |
4 // +----------------------------------------------------------------------+
5 // | Copyright (c) 2002-2006 James Heinrich, Allan Hansen |
6 // +----------------------------------------------------------------------+
7 // | This source file is subject to version 2 of the GPL license, |
8 // | that is bundled with this package in the file license.txt and is |
9 // | available through the world-wide-web at the following url: |
10 // | http://www.gnu.org/copyleft/gpl.html |
11 // +----------------------------------------------------------------------+
12 // | getID3() - http://getid3.sourceforge.net or http://www.getid3.org |
13 // +----------------------------------------------------------------------+
14 // | Authors: James Heinrich <infoØgetid3*org> |
15 // | Allan Hansen <ahØartemis*dk> |
16 // +----------------------------------------------------------------------+
17 // | module.audio-video.nsv.php |
18 // | module for analyzing Nullsoft NSV files |
19 // | dependencies: NONE |
20 // +----------------------------------------------------------------------+
21 //
22 // $Id: module.audio-video.nsv.php,v 1.3 2006/11/02 10:48:00 ah Exp $
23
24
25
26 class getid3_nsv extends getid3_handler
27 {
28
29 public function Analyze() {
30
31 $getid3 = $this->getid3;
32
33 $getid3->info['fileformat'] = 'nsv';
34 $getid3->info['audio']['dataformat'] = 'nsv';
35 $getid3->info['video']['dataformat'] = 'nsv';
36 $getid3->info['audio']['lossless'] = false;
37 $getid3->info['video']['lossless'] = false;
38
39 fseek($getid3->fp, $getid3->info['avdataoffset'], SEEK_SET);
40 $nsv_header = fread($getid3->fp, 4);
41
42 switch ($nsv_header) {
43
44 case 'NSVs':
45 $this->getNSVsHeader();
46 break;
47
48 case 'NSVf':
49 if ($this->getNSVfHeader()) {
50 $this->getNSVsHeader($getid3->info['nsv']['NSVf']['header_length']);
51 }
52 break;
53
54 default:
55 throw new getid3_exception('Expecting "NSVs" or "NSVf" at offset '.$getid3->info['avdataoffset'].', found "'.$nsv_header.'"');
56 break;
57 }
58
59 if (!isset($getid3->info['nsv']['NSVf'])) {
60 $getid3->warning('NSVf header not present - cannot calculate playtime or bitrate');
61 }
62
63 return true;
64 }
65
66
67
68 private function getNSVsHeader($file_offset = 0) {
69
70 $getid3 = $this->getid3;
71
72 fseek($getid3->fp, $file_offset, SEEK_SET);
73 $nsvs_header = fread($getid3->fp, 28);
74
75 $getid3->info['nsv']['NSVs'] = array ();
76 $info_nsv_NSVs = &$getid3->info['nsv']['NSVs'];
77
78 $info_nsv_NSVs['identifier'] = substr($nsvs_header, 0, 4);
79 if ($info_nsv_NSVs['identifier'] != 'NSVs') {
80 throw new getid3_exception('expected "NSVs" at offset ('.$file_offset.'), found "'.$info_nsv_NSVs['identifier'].'" instead');
81 }
82
83 $info_nsv_NSVs['offset'] = $file_offset;
84
85 getid3_lib::ReadSequence('LittleEndian2Int', $info_nsv_NSVs, $nsvs_header, 4,
86 array (
87 'video_codec' => -4, // string
88 'audio_codec' => -4, // string
89 'resolution_x' => 2,
90 'resolution_y' => 2,
91 'framerate_index' => 1,
92 )
93 );
94
95 if ($info_nsv_NSVs['audio_codec'] == 'PCM ') {
96
97 getid3_lib::ReadSequence('LittleEndian2Int', $info_nsv_NSVs, $nsvs_header, 24,
98 array (
99 'bits_channel' => 1,
100 'channels' => 1,
101 'sample_rate' => 2
102 )
103 );
104 $getid3->info['audio']['sample_rate'] = $info_nsv_NSVs['sample_rate'];
105
106 }
107
108 $getid3->info['video']['resolution_x'] = $info_nsv_NSVs['resolution_x'];
109 $getid3->info['video']['resolution_y'] = $info_nsv_NSVs['resolution_y'];
110 $info_nsv_NSVs['frame_rate'] = getid3_nsv::NSVframerateLookup($info_nsv_NSVs['framerate_index']);
111 $getid3->info['video']['frame_rate'] = $info_nsv_NSVs['frame_rate'];
112 $getid3->info['video']['bits_per_sample'] = 24;
113 $getid3->info['video']['pixel_aspect_ratio'] = (float)1;
114
115 return true;
116 }
117
118
119
120 private function getNSVfHeader($file_offset = 0, $get_toc_offsets=false) {
121
122 $getid3 = $this->getid3;
123
124 fseek($getid3->fp, $file_offset, SEEK_SET);
125 $nsvf_header = fread($getid3->fp, 28);
126
127 $getid3->info['nsv']['NSVf'] = array ();
128 $info_nsv_NSVf = &$getid3->info['nsv']['NSVf'];
129
130 $info_nsv_NSVf['identifier'] = substr($nsvf_header, 0, 4);
131 if ($info_nsv_NSVf['identifier'] != 'NSVf') {
132 throw new getid3_exception('expected "NSVf" at offset ('.$file_offset.'), found "'.$info_nsv_NSVf['identifier'].'" instead');
133 }
134
135 $getid3->info['nsv']['NSVs']['offset'] = $file_offset;
136
137 getid3_lib::ReadSequence('LittleEndian2Int', $info_nsv_NSVf, $nsvf_header, 4,
138 array (
139 'header_length' => 4,
140 'file_size' => 4,
141 'playtime_ms' => 4,
142 'meta_size' => 4,
143 'TOC_entries_1' => 4,
144 'TOC_entries_2' => 4
145 )
146 );
147
148 if ($info_nsv_NSVf['playtime_ms'] == 0) {
149 throw new getid3_exception('Corrupt NSV file: NSVf.playtime_ms == zero');
150 }
151
152 if ($info_nsv_NSVf['file_size'] > $getid3->info['avdataend']) {
153 $getid3->warning('truncated file - NSVf header indicates '.$info_nsv_NSVf['file_size'].' bytes, file actually '.$getid3->info['avdataend'].' bytes');
154 }
155
156 $nsvf_header .= fread($getid3->fp, $info_nsv_NSVf['meta_size'] + (4 * $info_nsv_NSVf['TOC_entries_1']) + (4 * $info_nsv_NSVf['TOC_entries_2']));
157 $nsvf_headerlength = strlen($nsvf_header);
158 $info_nsv_NSVf['metadata'] = substr($nsvf_header, 28, $info_nsv_NSVf['meta_size']);
159
160 $offset = 28 + $info_nsv_NSVf['meta_size'];
161 if ($get_toc_offsets) {
162 $toc_counter = 0;
163 while ($toc_counter < $info_nsv_NSVf['TOC_entries_1']) {
164 if ($toc_counter < $info_nsv_NSVf['TOC_entries_1']) {
165 $info_nsv_NSVf['TOC_1'][$toc_counter] = getid3_lib::LittleEndian2Int(substr($nsvf_header, $offset, 4));
166 $offset += 4;
167 $toc_counter++;
168 }
169 }
170 }
171
172 if (trim($info_nsv_NSVf['metadata']) != '') {
173 $info_nsv_NSVf['metadata'] = str_replace('`', "\x01", $info_nsv_NSVf['metadata']);
174 $comment_pair_array = explode("\x01".' ', $info_nsv_NSVf['metadata']);
175 foreach ($comment_pair_array as $comment_pair) {
176 if (strstr($comment_pair, '='."\x01")) {
177 list($key, $value) = explode('='."\x01", $comment_pair, 2);
178 $getid3->info['nsv']['comments'][strtolower($key)][] = trim(str_replace("\x01", '', $value));
179 }
180 }
181 }
182
183 $getid3->info['playtime_seconds'] = $info_nsv_NSVf['playtime_ms'] / 1000;
184 $getid3->info['bitrate'] = ($info_nsv_NSVf['file_size'] * 8) / $getid3->info['playtime_seconds'];
185
186 return true;
187 }
188
189
190
191 public static function NSVframerateLookup($frame_rate_index) {
192
193 if ($frame_rate_index <= 127) {
194 return (float)$frame_rate_index;
195 }
196
197 static $lookup = array (
198 129 => 29.970,
199 131 => 23.976,
200 133 => 14.985,
201 197 => 59.940,
202 199 => 47.952
203 );
204 return (isset($lookup[$frame_rate_index]) ? $lookup[$frame_rate_index] : false);
205 }
206
207 }
208
209
210 ?>