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module.audio.dts.php @ 3544

Last change on this file since 3544 was 3544, checked in by vdigital, 15 years ago
Change: getid3 upgraded to -> 1.7.9
Property svn:eol-style set to `LF` Property svn:keywords set to `Author Date Id Revision`
File size: 10.9 KB

Line
1	<?php
2	/////////////////////////////////////////////////////////////////
3	/// getID3() by James Heinrich <info@getid3.org> //
4	// available at http://getid3.sourceforge.net //
5	// or http://www.getid3.org //
6	/////////////////////////////////////////////////////////////////
7	// See readme.txt for more details //
8	/////////////////////////////////////////////////////////////////
9	// //
10	// module.audio.dts.php //
11	// module for analyzing DTS Audio files //
12	// dependencies: NONE //
13	// //
14	/////////////////////////////////////////////////////////////////
15
16
17	class getid3_dts
18	{
19
20	function getid3_dts(&$fd, &$ThisFileInfo) {
21	// Specs taken from "DTS Coherent Acoustics;Core and Extensions, ETSI TS 102 114 V1.2.1 (2002-12)"
22	// (http://pda.etsi.org/pda/queryform.asp)
23	// With thanks to Gambit <macteam@users.sourceforge.net> http://mac.sourceforge.net/atl/
24
25	$ThisFileInfo['fileformat'] = 'dts';
26
27	fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET);
28	$DTSheader = fread($fd, 16);
29
30	$ThisFileInfo['dts']['raw']['magic'] = getid3_lib::BigEndian2Int(substr($DTSheader, 0, 4));
31	if ($ThisFileInfo['dts']['raw']['magic'] != 0x7FFE8001) {
32	$ThisFileInfo['error'][] = 'Expecting "0x7FFE8001" at offset '.$ThisFileInfo['avdataoffset'].', found "0x'.str_pad(strtoupper(dechex($ThisFileInfo['dts']['raw']['magic'])), 8, '0', STR_PAD_LEFT).'"';
33	unset($ThisFileInfo['fileformat']);
34	unset($ThisFileInfo['dts']);
35	return false;
36	}
37
38	$fhBS = getid3_lib::BigEndian2Bin(substr($DTSheader, 4, 12));
39	$bsOffset = 0;
40	$ThisFileInfo['dts']['raw']['frame_type'] = bindec(substr($fhBS, $bsOffset, 1)); $bsOffset += 1;
41	$ThisFileInfo['dts']['raw']['deficit_samples'] = bindec(substr($fhBS, $bsOffset, 5)); $bsOffset += 5;
42	$ThisFileInfo['dts']['flags']['crc_present'] = (bool) bindec(substr($fhBS, $bsOffset, 1)); $bsOffset += 1;
43	$ThisFileInfo['dts']['raw']['pcm_sample_blocks'] = bindec(substr($fhBS, $bsOffset, 7)); $bsOffset += 7;
44	$ThisFileInfo['dts']['raw']['frame_byte_size'] = bindec(substr($fhBS, $bsOffset, 14)); $bsOffset += 14;
45	$ThisFileInfo['dts']['raw']['channel_arrangement'] = bindec(substr($fhBS, $bsOffset, 6)); $bsOffset += 6;
46	$ThisFileInfo['dts']['raw']['sample_frequency'] = bindec(substr($fhBS, $bsOffset, 4)); $bsOffset += 4;
47	$ThisFileInfo['dts']['raw']['bitrate'] = bindec(substr($fhBS, $bsOffset, 5)); $bsOffset += 5;
48	$ThisFileInfo['dts']['flags']['embedded_downmix'] = (bool) bindec(substr($fhBS, $bsOffset, 1)); $bsOffset += 1;
49	$ThisFileInfo['dts']['flags']['dynamicrange'] = (bool) bindec(substr($fhBS, $bsOffset, 1)); $bsOffset += 1;
50	$ThisFileInfo['dts']['flags']['timestamp'] = (bool) bindec(substr($fhBS, $bsOffset, 1)); $bsOffset += 1;
51	$ThisFileInfo['dts']['flags']['auxdata'] = (bool) bindec(substr($fhBS, $bsOffset, 1)); $bsOffset += 1;
52	$ThisFileInfo['dts']['flags']['hdcd'] = (bool) bindec(substr($fhBS, $bsOffset, 1)); $bsOffset += 1;
53	$ThisFileInfo['dts']['raw']['extension_audio'] = bindec(substr($fhBS, $bsOffset, 3)); $bsOffset += 3;
54	$ThisFileInfo['dts']['flags']['extended_coding'] = (bool) bindec(substr($fhBS, $bsOffset, 1)); $bsOffset += 1;
55	$ThisFileInfo['dts']['flags']['audio_sync_insertion'] = (bool) bindec(substr($fhBS, $bsOffset, 1)); $bsOffset += 1;
56	$ThisFileInfo['dts']['raw']['lfe_effects'] = bindec(substr($fhBS, $bsOffset, 2)); $bsOffset += 2;
57	$ThisFileInfo['dts']['flags']['predictor_history'] = (bool) bindec(substr($fhBS, $bsOffset, 1)); $bsOffset += 1;
58	if ($ThisFileInfo['dts']['flags']['crc_present']) {
59	$ThisFileInfo['dts']['raw']['crc16'] = bindec(substr($fhBS, $bsOffset, 16)); $bsOffset += 16;
60	}
61	$ThisFileInfo['dts']['flags']['mri_perfect_reconst'] = (bool) bindec(substr($fhBS, $bsOffset, 1)); $bsOffset += 1;
62	$ThisFileInfo['dts']['raw']['encoder_soft_version'] = bindec(substr($fhBS, $bsOffset, 4)); $bsOffset += 4;
63	$ThisFileInfo['dts']['raw']['copy_history'] = bindec(substr($fhBS, $bsOffset, 2)); $bsOffset += 2;
64	$ThisFileInfo['dts']['raw']['bits_per_sample'] = bindec(substr($fhBS, $bsOffset, 2)); $bsOffset += 2;
65	$ThisFileInfo['dts']['flags']['surround_es'] = (bool) bindec(substr($fhBS, $bsOffset, 1)); $bsOffset += 1;
66	$ThisFileInfo['dts']['flags']['front_sum_diff'] = (bool) bindec(substr($fhBS, $bsOffset, 1)); $bsOffset += 1;
67	$ThisFileInfo['dts']['flags']['surround_sum_diff'] = (bool) bindec(substr($fhBS, $bsOffset, 1)); $bsOffset += 1;
68	$ThisFileInfo['dts']['raw']['dialog_normalization'] = bindec(substr($fhBS, $bsOffset, 4)); $bsOffset += 4;
69
70
71	$ThisFileInfo['dts']['bitrate'] = $this->DTSbitrateLookup($ThisFileInfo['dts']['raw']['bitrate']);
72	$ThisFileInfo['dts']['bits_per_sample'] = $this->DTSbitPerSampleLookup($ThisFileInfo['dts']['raw']['bits_per_sample']);
73	$ThisFileInfo['dts']['sample_rate'] = $this->DTSsampleRateLookup($ThisFileInfo['dts']['raw']['sample_frequency']);
74	$ThisFileInfo['dts']['dialog_normalization'] = $this->DTSdialogNormalization($ThisFileInfo['dts']['raw']['dialog_normalization'], $ThisFileInfo['dts']['raw']['encoder_soft_version']);
75	$ThisFileInfo['dts']['flags']['lossless'] = (($ThisFileInfo['dts']['raw']['bitrate'] == 31) ? true : false);
76	$ThisFileInfo['dts']['bitrate_mode'] = (($ThisFileInfo['dts']['raw']['bitrate'] == 30) ? 'vbr' : 'cbr');
77	$ThisFileInfo['dts']['channels'] = $this->DTSnumChannelsLookup($ThisFileInfo['dts']['raw']['channel_arrangement']);
78	$ThisFileInfo['dts']['channel_arrangement'] = $this->DTSchannelArrangementLookup($ThisFileInfo['dts']['raw']['channel_arrangement']);
79
80	$ThisFileInfo['audio']['dataformat'] = 'dts';
81	$ThisFileInfo['audio']['lossless'] = $ThisFileInfo['dts']['flags']['lossless'];
82	$ThisFileInfo['audio']['bitrate_mode'] = $ThisFileInfo['dts']['bitrate_mode'];
83	$ThisFileInfo['audio']['bits_per_sample'] = $ThisFileInfo['dts']['bits_per_sample'];
84	$ThisFileInfo['audio']['sample_rate'] = $ThisFileInfo['dts']['sample_rate'];
85	$ThisFileInfo['audio']['channels'] = $ThisFileInfo['dts']['channels'];
86	$ThisFileInfo['audio']['bitrate'] = $ThisFileInfo['dts']['bitrate'];
87	if (isset($ThisFileInfo['avdataend'])) {
88	$ThisFileInfo['playtime_seconds'] = ($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) / ($ThisFileInfo['dts']['bitrate'] / 8);
89	}
90
91	return true;
92	}
93
94	function DTSbitrateLookup($index) {
95	$DTSbitrateLookup = array(
96	0 => 32000,
97	1 => 56000,
98	2 => 64000,
99	3 => 96000,
100	4 => 112000,
101	5 => 128000,
102	6 => 192000,
103	7 => 224000,
104	8 => 256000,
105	9 => 320000,
106	10 => 384000,
107	11 => 448000,
108	12 => 512000,
109	13 => 576000,
110	14 => 640000,
111	15 => 768000,
112	16 => 960000,
113	17 => 1024000,
114	18 => 1152000,
115	19 => 1280000,
116	20 => 1344000,
117	21 => 1408000,
118	22 => 1411200,
119	23 => 1472000,
120	24 => 1536000,
121	25 => 1920000,
122	26 => 2048000,
123	27 => 3072000,
124	28 => 3840000,
125	29 => 'open',
126	30 => 'variable',
127	31 => 'lossless'
128	);
129	return @$DTSbitrateLookup[$index];
130	}
131
132	function DTSsampleRateLookup($index) {
133	$DTSsampleRateLookup = array(
134	0 => 'invalid',
135	1 => 8000,
136	2 => 16000,
137	3 => 32000,
138	4 => 'invalid',
139	5 => 'invalid',
140	6 => 11025,
141	7 => 22050,
142	8 => 44100,
143	9 => 'invalid',
144	10 => 'invalid',
145	11 => 12000,
146	12 => 24000,
147	13 => 48000,
148	14 => 'invalid',
149	15 => 'invalid'
150	);
151	return @$DTSsampleRateLookup[$index];
152	}
153
154	function DTSbitPerSampleLookup($index) {
155	$DTSbitPerSampleLookup = array(
156	0 => 16,
157	1 => 20,
158	2 => 24,
159	3 => 24,
160	);
161	return @$DTSbitPerSampleLookup[$index];
162	}
163
164	function DTSnumChannelsLookup($index) {
165	switch ($index) {
166	case 0:
167	return 1;
168	break;
169	case 1:
170	case 2:
171	case 3:
172	case 4:
173	return 2;
174	break;
175	case 5:
176	case 6:
177	return 3;
178	break;
179	case 7:
180	case 8:
181	return 4;
182	break;
183	case 9:
184	return 5;
185	break;
186	case 10:
187	case 11:
188	case 12:
189	return 6;
190	break;
191	case 13:
192	return 7;
193	break;
194	case 14:
195	case 15:
196	return 8;
197	break;
198	}
199	return false;
200	}
201
202	function DTSchannelArrangementLookup($index) {
203	$DTSchannelArrangementLookup = array(
204	0 => 'A',
205	1 => 'A + B (dual mono)',
206	2 => 'L + R (stereo)',
207	3 => '(L+R) + (L-R) (sum-difference)',
208	4 => 'LT + RT (left and right total)',
209	5 => 'C + L + R',
210	6 => 'L + R + S',
211	7 => 'C + L + R + S',
212	8 => 'L + R + SL + SR',
213	9 => 'C + L + R + SL + SR',
214	10 => 'CL + CR + L + R + SL + SR',
215	11 => 'C + L + R+ LR + RR + OV',
216	12 => 'CF + CR + LF + RF + LR + RR',
217	13 => 'CL + C + CR + L + R + SL + SR',
218	14 => 'CL + CR + L + R + SL1 + SL2 + SR1 + SR2',
219	15 => 'CL + C+ CR + L + R + SL + S + SR',
220	);
221	return (@$DTSchannelArrangementLookup[$index] ? @$DTSchannelArrangementLookup[$index] : 'user-defined');
222	}
223
224	function DTSdialogNormalization($index, $version) {
225	switch ($version) {
226	case 7:
227	return 0 - $index;
228	break;
229	case 6:
230	return 0 - 16 - $index;
231	break;
232	}
233	return false;
234	}
235
236	}
237
238
239	?>

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source: extensions/charlies_content/getid3/getid3/module.audio.dts.php @ 3544

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