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comparison e2gallerypro/e2upload/Backend/Assets/getid3/module.audio.shorten.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.shorten.php |
18 // | Module for analyzing Shorten Audio files |
19 // | dependencies: module.audio-video.riff.php |
20 // +----------------------------------------------------------------------+
21 //
22 // $Id: module.audio.shorten.php,v 1.5 2006/12/03 19:28:18 ah Exp $
23
24
25
26 class getid3_shorten extends getid3_handler
27 {
28
29 public function __construct(getID3 $getid3) {
30
31 parent::__construct($getid3);
32
33 if ((bool)ini_get('safe_mode')) {
34 throw new getid3_exception('PHP running in Safe Mode - backtick operator not available, cannot analyze Shorten files.');
35 }
36
37 if (!`head --version`) {
38 throw new getid3_exception('head[.exe] binary not found in path. UNIX: typically /usr/bin. Windows: typically c:\windows\system32.');
39 }
40
41 if (!`shorten -l`) {
42 throw new getid3_exception('shorten[.exe] binary not found in path. UNIX: typically /usr/bin. Windows: typically c:\windows\system32.');
43 }
44 }
45
46
47 public function Analyze() {
48
49 $getid3 = $this->getid3;
50
51 $getid3->include_module('audio-video.riff');
52
53 fseek($getid3->fp, $getid3->info['avdataoffset'], SEEK_SET);
54
55 $shn_header = fread($getid3->fp, 8);
56
57 // Magic bytes: "ajkg"
58
59 $getid3->info['fileformat'] = 'shn';
60 $getid3->info['audio']['dataformat'] = 'shn';
61 $getid3->info['audio']['lossless'] = true;
62 $getid3->info['audio']['bitrate_mode'] = 'vbr';
63
64 $getid3->info['shn']['version'] = getid3_lib::LittleEndian2Int($shn_header{4});
65
66 fseek($getid3->fp, $getid3->info['avdataend'] - 12, SEEK_SET);
67
68 $seek_table_signature_test = fread($getid3->fp, 12);
69
70 $getid3->info['shn']['seektable']['present'] = (bool)(substr($seek_table_signature_test, 4, 8) == 'SHNAMPSK');
71 if ($getid3->info['shn']['seektable']['present']) {
72
73 $getid3->info['shn']['seektable']['length'] = getid3_lib::LittleEndian2Int(substr($seek_table_signature_test, 0, 4));
74 $getid3->info['shn']['seektable']['offset'] = $getid3->info['avdataend'] - $getid3->info['shn']['seektable']['length'];
75 fseek($getid3->fp, $getid3->info['shn']['seektable']['offset'], SEEK_SET);
76 $seek_table_magic = fread($getid3->fp, 4);
77
78 if ($seek_table_magic != 'SEEK') {
79
80 throw new getid3_exception('Expecting "SEEK" at offset '.$getid3->info['shn']['seektable']['offset'].', found "'.$seek_table_magic.'"');
81 }
82
83 $seek_table_data = fread($getid3->fp, $getid3->info['shn']['seektable']['length'] - 16);
84 $getid3->info['shn']['seektable']['entry_count'] = floor(strlen($seek_table_data) / 80);
85 }
86
87 $commandline = 'shorten -x '.escapeshellarg(realpath($getid3->filename)).' - | head -c 64';
88 $output = `$commandline`;
89
90 if (@$output && substr($output, 12, 4) == 'fmt ') {
91
92 $fmt_size = getid3_lib::LittleEndian2Int(substr($output, 16, 4));
93 $decoded_wav_format_ex = getid3_riff::RIFFparseWAVEFORMATex(substr($output, 20, $fmt_size));
94
95 $getid3->info['audio']['channels'] = $decoded_wav_format_ex['channels'];
96 $getid3->info['audio']['bits_per_sample'] = $decoded_wav_format_ex['bits_per_sample'];
97 $getid3->info['audio']['sample_rate'] = $decoded_wav_format_ex['sample_rate'];
98
99 if (substr($output, 20 + $fmt_size, 4) == 'data') {
100
101 $getid3->info['playtime_seconds'] = getid3_lib::LittleEndian2Int(substr($output, 20 + 4 + $fmt_size, 4)) / $decoded_wav_format_ex['raw']['nAvgBytesPerSec'];
102
103 } else {
104
105 throw new getid3_exception('shorten failed to decode DATA chunk to expected location, cannot determine playtime');
106 }
107
108 $getid3->info['audio']['bitrate'] = (($getid3->info['avdataend'] - $getid3->info['avdataoffset']) / $getid3->info['playtime_seconds']) * 8;
109
110 } else {
111
112 throw new getid3_exception('shorten failed to decode file to WAV for parsing');
113 return false;
114 }
115
116 return true;
117 }
118
119 }
120
121 ?>