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comparison e2gallerypro/e2upload/Backend/Assets/getid3/module.audio.dts.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.dts.php |
18 // | Module for analyzing DTS audio files |
19 // | dependencies: NONE |
20 // +----------------------------------------------------------------------+
21 //
22 // $Id: module.audio.dts.php,v 1.2 2006/11/16 13:14:26 ah Exp $
23
24
25
26 // Specs taken from "DTS Coherent Acoustics;Core and Extensions, ETSI TS 102 114 V1.2.1 (2002-12)"
27 // (http://pda.etsi.org/pda/queryform.asp)
28 // With thanks to Gambit <macteam@users.sourceforge.net> http://mac.sourceforge.net/atl/
29
30 class getid3_dts extends getid3_handler
31 {
32
33 public function Analyze() {
34
35 $getid3 = $this->getid3;
36
37 $getid3->info['dts'] = array ();
38 $info_dts = &$getid3->info['dts'];
39
40 $getid3->info['fileformat'] = 'dts';
41
42 fseek($getid3->fp, $getid3->info['avdataoffset'], SEEK_SET);
43 $header = fread($getid3->fp, 16);
44
45 $fhBS = getid3_lib::BigEndian2Bin(substr($header, 4, 12));
46 $bs_offset = 0;
47 $info_dts['raw']['frame_type'] = bindec(substr($fhBS, $bs_offset, 1)); $bs_offset += 1;
48 $info_dts['raw']['deficit_samples'] = bindec(substr($fhBS, $bs_offset, 5)); $bs_offset += 5;
49 $info_dts['flags']['crc_present'] = (bool) bindec(substr($fhBS, $bs_offset, 1)); $bs_offset += 1;
50 $info_dts['raw']['pcm_sample_blocks'] = bindec(substr($fhBS, $bs_offset, 7)); $bs_offset += 7;
51 $info_dts['raw']['frame_byte_size'] = bindec(substr($fhBS, $bs_offset, 14)); $bs_offset += 14;
52 $info_dts['raw']['channel_arrangement'] = bindec(substr($fhBS, $bs_offset, 6)); $bs_offset += 6;
53 $info_dts['raw']['sample_frequency'] = bindec(substr($fhBS, $bs_offset, 4)); $bs_offset += 4;
54 $info_dts['raw']['bitrate'] = bindec(substr($fhBS, $bs_offset, 5)); $bs_offset += 5;
55 $info_dts['flags']['embedded_downmix'] = (bool) bindec(substr($fhBS, $bs_offset, 1)); $bs_offset += 1;
56 $info_dts['flags']['dynamicrange'] = (bool) bindec(substr($fhBS, $bs_offset, 1)); $bs_offset += 1;
57 $info_dts['flags']['timestamp'] = (bool) bindec(substr($fhBS, $bs_offset, 1)); $bs_offset += 1;
58 $info_dts['flags']['auxdata'] = (bool) bindec(substr($fhBS, $bs_offset, 1)); $bs_offset += 1;
59 $info_dts['flags']['hdcd'] = (bool) bindec(substr($fhBS, $bs_offset, 1)); $bs_offset += 1;
60 $info_dts['raw']['extension_audio'] = bindec(substr($fhBS, $bs_offset, 3)); $bs_offset += 3;
61 $info_dts['flags']['extended_coding'] = (bool) bindec(substr($fhBS, $bs_offset, 1)); $bs_offset += 1;
62 $info_dts['flags']['audio_sync_insertion'] = (bool) bindec(substr($fhBS, $bs_offset, 1)); $bs_offset += 1;
63 $info_dts['raw']['lfe_effects'] = bindec(substr($fhBS, $bs_offset, 2)); $bs_offset += 2;
64 $info_dts['flags']['predictor_history'] = (bool) bindec(substr($fhBS, $bs_offset, 1)); $bs_offset += 1;
65 if ($info_dts['flags']['crc_present']) {
66 $info_dts['raw']['crc16'] = bindec(substr($fhBS, $bs_offset, 16)); $bs_offset += 16;
67 }
68 $info_dts['flags']['mri_perfect_reconst'] = (bool) bindec(substr($fhBS, $bs_offset, 1)); $bs_offset += 1;
69 $info_dts['raw']['encoder_soft_version'] = bindec(substr($fhBS, $bs_offset, 4)); $bs_offset += 4;
70 $info_dts['raw']['copy_history'] = bindec(substr($fhBS, $bs_offset, 2)); $bs_offset += 2;
71 $info_dts['raw']['bits_per_sample'] = bindec(substr($fhBS, $bs_offset, 2)); $bs_offset += 2;
72 $info_dts['flags']['surround_es'] = (bool) bindec(substr($fhBS, $bs_offset, 1)); $bs_offset += 1;
73 $info_dts['flags']['front_sum_diff'] = (bool) bindec(substr($fhBS, $bs_offset, 1)); $bs_offset += 1;
74 $info_dts['flags']['surround_sum_diff'] = (bool) bindec(substr($fhBS, $bs_offset, 1)); $bs_offset += 1;
75 $info_dts['raw']['dialog_normalization'] = bindec(substr($fhBS, $bs_offset, 4)); $bs_offset += 4;
76
77
78 $info_dts['bitrate'] = $this->DTSbitrateLookup($info_dts['raw']['bitrate']);
79 $info_dts['bits_per_sample'] = $this->DTSbitPerSampleLookup($info_dts['raw']['bits_per_sample']);
80 $info_dts['sample_rate'] = $this->DTSsampleRateLookup($info_dts['raw']['sample_frequency']);
81 $info_dts['dialog_normalization'] = $this->DTSdialogNormalization($info_dts['raw']['dialog_normalization'], $info_dts['raw']['encoder_soft_version']);
82 $info_dts['flags']['lossless'] = (($info_dts['raw']['bitrate'] == 31) ? true : false);
83 $info_dts['bitrate_mode'] = (($info_dts['raw']['bitrate'] == 30) ? 'vbr' : 'cbr');
84 $info_dts['channels'] = $this->DTSnumChannelsLookup($info_dts['raw']['channel_arrangement']);
85 $info_dts['channel_arrangement'] = $this->DTSchannelArrangementLookup($info_dts['raw']['channel_arrangement']);
86
87 $getid3->info['audio']['dataformat'] = 'dts';
88 $getid3->info['audio']['lossless'] = $info_dts['flags']['lossless'];
89 $getid3->info['audio']['bitrate_mode'] = $info_dts['bitrate_mode'];
90 $getid3->info['audio']['bits_per_sample'] = $info_dts['bits_per_sample'];
91 $getid3->info['audio']['sample_rate'] = $info_dts['sample_rate'];
92 $getid3->info['audio']['channels'] = $info_dts['channels'];
93 $getid3->info['audio']['bitrate'] = $info_dts['bitrate'];
94 $getid3->info['playtime_seconds'] = ($getid3->info['avdataend'] - $getid3->info['avdataoffset']) / ($info_dts['bitrate'] / 8);
95
96 return true;
97 }
98
99
100 public static function DTSbitrateLookup($index) {
101
102 static $lookup = array (
103 0 => 32000,
104 1 => 56000,
105 2 => 64000,
106 3 => 96000,
107 4 => 112000,
108 5 => 128000,
109 6 => 192000,
110 7 => 224000,
111 8 => 256000,
112 9 => 320000,
113 10 => 384000,
114 11 => 448000,
115 12 => 512000,
116 13 => 576000,
117 14 => 640000,
118 15 => 768000,
119 16 => 960000,
120 17 => 1024000,
121 18 => 1152000,
122 19 => 1280000,
123 20 => 1344000,
124 21 => 1408000,
125 22 => 1411200,
126 23 => 1472000,
127 24 => 1536000,
128 25 => 1920000,
129 26 => 2048000,
130 27 => 3072000,
131 28 => 3840000,
132 29 => 'open',
133 30 => 'variable',
134 31 => 'lossless'
135 );
136 return @$lookup[$index];
137 }
138
139
140 public static function DTSsampleRateLookup($index) {
141
142 static $lookup = array (
143 0 => 'invalid',
144 1 => 8000,
145 2 => 16000,
146 3 => 32000,
147 4 => 'invalid',
148 5 => 'invalid',
149 6 => 11025,
150 7 => 22050,
151 8 => 44100,
152 9 => 'invalid',
153 10 => 'invalid',
154 11 => 12000,
155 12 => 24000,
156 13 => 48000,
157 14 => 'invalid',
158 15 => 'invalid'
159 );
160 return @$lookup[$index];
161 }
162
163
164 public static function DTSbitPerSampleLookup($index) {
165
166 static $lookup = array (
167 0 => 16,
168 1 => 20,
169 2 => 24,
170 3 => 24,
171 );
172 return @$lookup[$index];
173 }
174
175
176 public static function DTSnumChannelsLookup($index) {
177
178 switch ($index) {
179 case 0:
180 return 1;
181
182 case 1:
183 case 2:
184 case 3:
185 case 4:
186 return 2;
187
188 case 5:
189 case 6:
190 return 3;
191
192 case 7:
193 case 8:
194 return 4;
195
196 case 9:
197 return 5;
198
199 case 10:
200 case 11:
201 case 12:
202 return 6;
203
204 case 13:
205 return 7;
206
207 case 14:
208 case 15:
209 return 8;
210 }
211 return false;
212 }
213
214
215 public static function DTSchannelArrangementLookup($index) {
216
217 static $lookup = array (
218 0 => 'A',
219 1 => 'A + B (dual mono)',
220 2 => 'L + R (stereo)',
221 3 => '(L+R) + (L-R) (sum-difference)',
222 4 => 'LT + RT (left and right total)',
223 5 => 'C + L + R',
224 6 => 'L + R + S',
225 7 => 'C + L + R + S',
226 8 => 'L + R + SL + SR',
227 9 => 'C + L + R + SL + SR',
228 10 => 'CL + CR + L + R + SL + SR',
229 11 => 'C + L + R+ LR + RR + OV',
230 12 => 'CF + CR + LF + RF + LR + RR',
231 13 => 'CL + C + CR + L + R + SL + SR',
232 14 => 'CL + CR + L + R + SL1 + SL2 + SR1 + SR2',
233 15 => 'CL + C+ CR + L + R + SL + S + SR',
234 );
235 return (@$lookup[$index] ? @$lookup[$index] : 'user-defined');
236 }
237
238
239 public static function DTSdialogNormalization($index, $version) {
240
241 switch ($version) {
242 case 7:
243 return 0 - $index;
244
245 case 6:
246 return 0 - 16 - $index;
247 }
248 return false;
249 }
250
251 }
252
253
254 ?>