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comparison e2gallerypro/e2upload/Backend/Assets/getid3/module.audio.mp3.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.mp3.php |
18 // | Module for analyzing MPEG Audio Layer 1,2,3 files. |
19 // | dependencies: none |
20 // +----------------------------------------------------------------------+
21 //
22 // $Id: module.audio.mp3.php,v 1.10 2006/11/16 22:57:57 ah Exp $
23
24
25
26 class getid3_mp3 extends getid3_handler
27 {
28 // Number of frames to scan to determine if MPEG-audio sequence is valid.
29 // Lower this number to 5-20 for faster scanning
30 // Increase this number to 50+ for most accurate detection of valid VBR/CBR mpeg-audio streams
31 const VALID_CHECK_FRAMES = 35;
32
33
34 public function Analyze() {
35
36 $this->getAllMPEGInfo($this->getid3->fp, $this->getid3->info);
37
38 return true;
39 }
40
41
42 public function AnalyzeMPEGaudioInfo() {
43
44 $this->getOnlyMPEGaudioInfo($this->getid3->fp, $this->getid3->info, $this->getid3->info['avdataoffset'], false);
45 }
46
47
48 public function getAllMPEGInfo(&$fd, &$info) {
49
50 $this->getOnlyMPEGaudioInfo($fd, $info, 0 + $info['avdataoffset']);
51
52 if (isset($info['mpeg']['audio']['bitrate_mode'])) {
53 $info['audio']['bitrate_mode'] = strtolower($info['mpeg']['audio']['bitrate_mode']);
54 }
55
56 if (((isset($info['id3v2']['headerlength']) && ($info['avdataoffset'] > $info['id3v2']['headerlength'])) || (!isset($info['id3v2']) && ($info['avdataoffset'] > 0)))) {
57
58 $synch_offset_warning = 'Unknown data before synch ';
59 if (isset($info['id3v2']['headerlength'])) {
60 $synch_offset_warning .= '(ID3v2 header ends at '.$info['id3v2']['headerlength'].', then '.($info['avdataoffset'] - $info['id3v2']['headerlength']).' bytes garbage, ';
61 } else {
62 $synch_offset_warning .= '(should be at beginning of file, ';
63 }
64 $synch_offset_warning .= 'synch detected at '.$info['avdataoffset'].')';
65 if ($info['audio']['bitrate_mode'] == 'cbr') {
66
67 if (!empty($info['id3v2']['headerlength']) && (($info['avdataoffset'] - $info['id3v2']['headerlength']) == $info['mpeg']['audio']['framelength'])) {
68
69 $synch_offset_warning .= '. This is a known problem with some versions of LAME (3.90-3.92) DLL in CBR mode.';
70 $info['audio']['codec'] = 'LAME';
71 $current_data_lame_version_string = 'LAME3.';
72
73 } elseif (empty($info['id3v2']['headerlength']) && ($info['avdataoffset'] == $info['mpeg']['audio']['framelength'])) {
74
75 $synch_offset_warning .= '. This is a known problem with some versions of LAME (3.90 - 3.92) DLL in CBR mode.';
76 $info['audio']['codec'] = 'LAME';
77 $current_data_lame_version_string = 'LAME3.';
78
79 }
80
81 }
82 $this->getid3->warning($synch_offset_warning);
83
84 }
85
86 if (isset($info['mpeg']['audio']['LAME'])) {
87 $info['audio']['codec'] = 'LAME';
88 if (!empty($info['mpeg']['audio']['LAME']['long_version'])) {
89 $info['audio']['encoder'] = rtrim($info['mpeg']['audio']['LAME']['long_version'], "\x00");
90 } elseif (!empty($info['mpeg']['audio']['LAME']['short_version'])) {
91 $info['audio']['encoder'] = rtrim($info['mpeg']['audio']['LAME']['short_version'], "\x00");
92 }
93 }
94
95 $current_data_lame_version_string = (!empty($current_data_lame_version_string) ? $current_data_lame_version_string : @$info['audio']['encoder']);
96 if (!empty($current_data_lame_version_string) && (substr($current_data_lame_version_string, 0, 6) == 'LAME3.') && !preg_match('[0-9\)]', substr($current_data_lame_version_string, -1))) {
97 // a version number of LAME that does not end with a number like "LAME3.92"
98 // or with a closing parenthesis like "LAME3.88 (alpha)"
99 // or a version of LAME with the LAMEtag-not-filled-in-DLL-mode bug (3.90-3.92)
100
101 // not sure what the actual last frame length will be, but will be less than or equal to 1441
102 $possibly_longer_lame_version_frame_length = 1441;
103
104 // Not sure what version of LAME this is - look in padding of last frame for longer version string
105 $possible_lame_version_string_offset = $info['avdataend'] - $possibly_longer_lame_version_frame_length;
106 fseek($fd, $possible_lame_version_string_offset);
107 $possibly_longer_lame_version_data = fread($fd, $possibly_longer_lame_version_frame_length);
108 switch (substr($current_data_lame_version_string, -1)) {
109 case 'a':
110 case 'b':
111 // "LAME3.94a" will have a longer version string of "LAME3.94 (alpha)" for example
112 // need to trim off "a" to match longer string
113 $current_data_lame_version_string = substr($current_data_lame_version_string, 0, -1);
114 break;
115 }
116 if (($possibly_longer_lame_version_string = strstr($possibly_longer_lame_version_data, $current_data_lame_version_string)) !== false) {
117 if (substr($possibly_longer_lame_version_string, 0, strlen($current_data_lame_version_string)) == $current_data_lame_version_string) {
118 $possibly_longer_lame_version_new_string = substr($possibly_longer_lame_version_string, 0, strspn($possibly_longer_lame_version_string, 'LAME0123456789., (abcdefghijklmnopqrstuvwxyzJFSOND)')); //"LAME3.90.3" "LAME3.87 (beta 1, Sep 27 2000)" "LAME3.88 (beta)"
119 if (strlen($possibly_longer_lame_version_new_string) > strlen(@$info['audio']['encoder'])) {
120 $info['audio']['encoder'] = $possibly_longer_lame_version_new_string;
121 }
122 }
123 }
124 }
125 if (!empty($info['audio']['encoder'])) {
126 $info['audio']['encoder'] = rtrim($info['audio']['encoder'], "\x00 ");
127 }
128
129 switch (@$info['mpeg']['audio']['layer']) {
130 case 1:
131 case 2:
132 $info['audio']['dataformat'] = 'mp'.$info['mpeg']['audio']['layer'];
133 break;
134 }
135 if (@$info['fileformat'] == 'mp3') {
136 switch ($info['audio']['dataformat']) {
137 case 'mp1':
138 case 'mp2':
139 case 'mp3':
140 $info['fileformat'] = $info['audio']['dataformat'];
141 break;
142
143 default:
144 $this->getid3->warning('Expecting [audio][dataformat] to be mp1/mp2/mp3 when fileformat == mp3, [audio][dataformat] actually "'.$info['audio']['dataformat'].'"');
145 break;
146 }
147 }
148
149 $info['mime_type'] = 'audio/mpeg';
150 $info['audio']['lossless'] = false;
151
152 // Calculate playtime
153 if (!isset($info['playtime_seconds']) && isset($info['audio']['bitrate']) && ($info['audio']['bitrate'] > 0)) {
154 $info['playtime_seconds'] = ($info['avdataend'] - $info['avdataoffset']) * 8 / $info['audio']['bitrate'];
155 }
156
157 $info['audio']['encoder_options'] = getid3_mp3::GuessEncoderOptions($info);
158
159 return true;
160 }
161
162
163
164 public static function GuessEncoderOptions(&$info) {
165 // shortcuts
166 if (!empty($info['mpeg']['audio'])) {
167 $thisfile_mpeg_audio = &$info['mpeg']['audio'];
168 if (!empty($thisfile_mpeg_audio['LAME'])) {
169 $thisfile_mpeg_audio_lame = &$thisfile_mpeg_audio['LAME'];
170 }
171 }
172
173 $encoder_options = '';
174 static $named_preset_bitrates = array (16, 24, 40, 56, 112, 128, 160, 192, 256);
175
176 if ((@$thisfile_mpeg_audio['VBR_method'] == 'Fraunhofer') && !empty($thisfile_mpeg_audio['VBR_quality'])) {
177
178 $encoder_options = 'VBR q'.$thisfile_mpeg_audio['VBR_quality'];
179
180 } elseif (!empty($thisfile_mpeg_audio_lame['preset_used']) && (!in_array($thisfile_mpeg_audio_lame['preset_used_id'], $named_preset_bitrates))) {
181
182 $encoder_options = $thisfile_mpeg_audio_lame['preset_used'];
183
184 } elseif (!empty($thisfile_mpeg_audio_lame['vbr_quality'])) {
185
186 static $known_encoder_values = array ();
187 if (empty($known_encoder_values)) {
188
189 //$known_encoder_values[abrbitrate_minbitrate][vbr_quality][raw_vbr_method][raw_noise_shaping][raw_stereo_mode][ath_type][lowpass_frequency] = 'preset name';
190 $known_encoder_values[0xFF][58][1][1][3][2][20500] = '--alt-preset insane'; // 3.90, 3.90.1, 3.92
191 $known_encoder_values[0xFF][58][1][1][3][2][20600] = '--alt-preset insane'; // 3.90.2, 3.90.3, 3.91
192 $known_encoder_values[0xFF][57][1][1][3][4][20500] = '--alt-preset insane'; // 3.94, 3.95
193 $known_encoder_values['**'][78][3][2][3][2][19500] = '--alt-preset extreme'; // 3.90, 3.90.1, 3.92
194 $known_encoder_values['**'][78][3][2][3][2][19600] = '--alt-preset extreme'; // 3.90.2, 3.91
195 $known_encoder_values['**'][78][3][1][3][2][19600] = '--alt-preset extreme'; // 3.90.3
196 $known_encoder_values['**'][78][4][2][3][2][19500] = '--alt-preset fast extreme'; // 3.90, 3.90.1, 3.92
197 $known_encoder_values['**'][78][4][2][3][2][19600] = '--alt-preset fast extreme'; // 3.90.2, 3.90.3, 3.91
198 $known_encoder_values['**'][78][3][2][3][4][19000] = '--alt-preset standard'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92
199 $known_encoder_values['**'][78][3][1][3][4][19000] = '--alt-preset standard'; // 3.90.3
200 $known_encoder_values['**'][78][4][2][3][4][19000] = '--alt-preset fast standard'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92
201 $known_encoder_values['**'][78][4][1][3][4][19000] = '--alt-preset fast standard'; // 3.90.3
202 $known_encoder_values['**'][88][4][1][3][3][19500] = '--r3mix'; // 3.90, 3.90.1, 3.92
203 $known_encoder_values['**'][88][4][1][3][3][19600] = '--r3mix'; // 3.90.2, 3.90.3, 3.91
204 $known_encoder_values['**'][67][4][1][3][4][18000] = '--r3mix'; // 3.94, 3.95
205 $known_encoder_values['**'][68][3][2][3][4][18000] = '--alt-preset medium'; // 3.90.3
206 $known_encoder_values['**'][68][4][2][3][4][18000] = '--alt-preset fast medium'; // 3.90.3
207
208 $known_encoder_values[0xFF][99][1][1][1][2][0] = '--preset studio'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92
209 $known_encoder_values[0xFF][58][2][1][3][2][20600] = '--preset studio'; // 3.90.3, 3.93.1
210 $known_encoder_values[0xFF][58][2][1][3][2][20500] = '--preset studio'; // 3.93
211 $known_encoder_values[0xFF][57][2][1][3][4][20500] = '--preset studio'; // 3.94, 3.95
212 $known_encoder_values[0xC0][88][1][1][1][2][0] = '--preset cd'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92
213 $known_encoder_values[0xC0][58][2][2][3][2][19600] = '--preset cd'; // 3.90.3, 3.93.1
214 $known_encoder_values[0xC0][58][2][2][3][2][19500] = '--preset cd'; // 3.93
215 $known_encoder_values[0xC0][57][2][1][3][4][19500] = '--preset cd'; // 3.94, 3.95
216 $known_encoder_values[0xA0][78][1][1][3][2][18000] = '--preset hifi'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92
217 $known_encoder_values[0xA0][58][2][2][3][2][18000] = '--preset hifi'; // 3.90.3, 3.93, 3.93.1
218 $known_encoder_values[0xA0][57][2][1][3][4][18000] = '--preset hifi'; // 3.94, 3.95
219 $known_encoder_values[0x80][67][1][1][3][2][18000] = '--preset tape'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92
220 $known_encoder_values[0x80][67][1][1][3][2][15000] = '--preset radio'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92
221 $known_encoder_values[0x70][67][1][1][3][2][15000] = '--preset fm'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92
222 $known_encoder_values[0x70][58][2][2][3][2][16000] = '--preset tape/radio/fm'; // 3.90.3, 3.93, 3.93.1
223 $known_encoder_values[0x70][57][2][1][3][4][16000] = '--preset tape/radio/fm'; // 3.94, 3.95
224 $known_encoder_values[0x38][58][2][2][0][2][10000] = '--preset voice'; // 3.90.3, 3.93, 3.93.1
225 $known_encoder_values[0x38][57][2][1][0][4][15000] = '--preset voice'; // 3.94, 3.95
226 $known_encoder_values[0x38][57][2][1][0][4][16000] = '--preset voice'; // 3.94a14
227 $known_encoder_values[0x28][65][1][1][0][2][7500] = '--preset mw-us'; // 3.90, 3.90.1, 3.92
228 $known_encoder_values[0x28][65][1][1][0][2][7600] = '--preset mw-us'; // 3.90.2, 3.91
229 $known_encoder_values[0x28][58][2][2][0][2][7000] = '--preset mw-us'; // 3.90.3, 3.93, 3.93.1
230 $known_encoder_values[0x28][57][2][1][0][4][10500] = '--preset mw-us'; // 3.94, 3.95
231 $known_encoder_values[0x28][57][2][1][0][4][11200] = '--preset mw-us'; // 3.94a14
232 $known_encoder_values[0x28][57][2][1][0][4][8800] = '--preset mw-us'; // 3.94a15
233 $known_encoder_values[0x18][58][2][2][0][2][4000] = '--preset phon+/lw/mw-eu/sw'; // 3.90.3, 3.93.1
234 $known_encoder_values[0x18][58][2][2][0][2][3900] = '--preset phon+/lw/mw-eu/sw'; // 3.93
235 $known_encoder_values[0x18][57][2][1][0][4][5900] = '--preset phon+/lw/mw-eu/sw'; // 3.94, 3.95
236 $known_encoder_values[0x18][57][2][1][0][4][6200] = '--preset phon+/lw/mw-eu/sw'; // 3.94a14
237 $known_encoder_values[0x18][57][2][1][0][4][3200] = '--preset phon+/lw/mw-eu/sw'; // 3.94a15
238 $known_encoder_values[0x10][58][2][2][0][2][3800] = '--preset phone'; // 3.90.3, 3.93.1
239 $known_encoder_values[0x10][58][2][2][0][2][3700] = '--preset phone'; // 3.93
240 $known_encoder_values[0x10][57][2][1][0][4][5600] = '--preset phone'; // 3.94, 3.95
241 }
242
243 if (isset($known_encoder_values[$thisfile_mpeg_audio_lame['raw']['abrbitrate_minbitrate']][$thisfile_mpeg_audio_lame['vbr_quality']][$thisfile_mpeg_audio_lame['raw']['vbr_method']][$thisfile_mpeg_audio_lame['raw']['noise_shaping']][$thisfile_mpeg_audio_lame['raw']['stereo_mode']][$thisfile_mpeg_audio_lame['ath_type']][$thisfile_mpeg_audio_lame['lowpass_frequency']])) {
244
245 $encoder_options = $known_encoder_values[$thisfile_mpeg_audio_lame['raw']['abrbitrate_minbitrate']][$thisfile_mpeg_audio_lame['vbr_quality']][$thisfile_mpeg_audio_lame['raw']['vbr_method']][$thisfile_mpeg_audio_lame['raw']['noise_shaping']][$thisfile_mpeg_audio_lame['raw']['stereo_mode']][$thisfile_mpeg_audio_lame['ath_type']][$thisfile_mpeg_audio_lame['lowpass_frequency']];
246
247 } elseif (isset($known_encoder_values['**'][$thisfile_mpeg_audio_lame['vbr_quality']][$thisfile_mpeg_audio_lame['raw']['vbr_method']][$thisfile_mpeg_audio_lame['raw']['noise_shaping']][$thisfile_mpeg_audio_lame['raw']['stereo_mode']][$thisfile_mpeg_audio_lame['ath_type']][$thisfile_mpeg_audio_lame['lowpass_frequency']])) {
248
249 $encoder_options = $known_encoder_values['**'][$thisfile_mpeg_audio_lame['vbr_quality']][$thisfile_mpeg_audio_lame['raw']['vbr_method']][$thisfile_mpeg_audio_lame['raw']['noise_shaping']][$thisfile_mpeg_audio_lame['raw']['stereo_mode']][$thisfile_mpeg_audio_lame['ath_type']][$thisfile_mpeg_audio_lame['lowpass_frequency']];
250
251 } elseif ($info['audio']['bitrate_mode'] == 'vbr') {
252
253 // http://gabriel.mp3-tech.org/mp3infotag.html
254 // int Quality = (100 - 10 * gfp->VBR_q - gfp->quality)h
255
256
257 $lame_v_value = 10 - ceil($thisfile_mpeg_audio_lame['vbr_quality'] / 10);
258 $lame_q_value = 100 - $thisfile_mpeg_audio_lame['vbr_quality'] - ($lame_v_value * 10);
259 $encoder_options = '-V'.$lame_v_value.' -q'.$lame_q_value;
260
261 } elseif ($info['audio']['bitrate_mode'] == 'cbr') {
262
263 $encoder_options = strtoupper($info['audio']['bitrate_mode']).ceil($info['audio']['bitrate'] / 1000);
264
265 } else {
266
267 $encoder_options = strtoupper($info['audio']['bitrate_mode']);
268
269 }
270
271 } elseif (!empty($thisfile_mpeg_audio_lame['bitrate_abr'])) {
272
273 $encoder_options = 'ABR'.$thisfile_mpeg_audio_lame['bitrate_abr'];
274
275 } elseif (!empty($info['audio']['bitrate'])) {
276
277 if ($info['audio']['bitrate_mode'] == 'cbr') {
278 $encoder_options = strtoupper($info['audio']['bitrate_mode']).ceil($info['audio']['bitrate'] / 1000);
279 } else {
280 $encoder_options = strtoupper($info['audio']['bitrate_mode']);
281 }
282
283 }
284 if (!empty($thisfile_mpeg_audio_lame['bitrate_min'])) {
285 $encoder_options .= ' -b'.$thisfile_mpeg_audio_lame['bitrate_min'];
286 }
287
288 if (@$thisfile_mpeg_audio_lame['encoding_flags']['nogap_prev'] || @$thisfile_mpeg_audio_lame['encoding_flags']['nogap_next']) {
289 $encoder_options .= ' --nogap';
290 }
291
292 if (!empty($thisfile_mpeg_audio_lame['lowpass_frequency'])) {
293 $exploded_options = explode(' ', $encoder_options, 4);
294 if ($exploded_options[0] == '--r3mix') {
295 $exploded_options[1] = 'r3mix';
296 }
297 switch ($exploded_options[0]) {
298 case '--preset':
299 case '--alt-preset':
300 case '--r3mix':
301 if ($exploded_options[1] == 'fast') {
302 $exploded_options[1] .= ' '.$exploded_options[2];
303 }
304 switch ($exploded_options[1]) {
305 case 'portable':
306 case 'medium':
307 case 'standard':
308 case 'extreme':
309 case 'insane':
310 case 'fast portable':
311 case 'fast medium':
312 case 'fast standard':
313 case 'fast extreme':
314 case 'fast insane':
315 case 'r3mix':
316 static $expected_lowpass = array (
317 'insane|20500' => 20500,
318 'insane|20600' => 20600, // 3.90.2, 3.90.3, 3.91
319 'medium|18000' => 18000,
320 'fast medium|18000' => 18000,
321 'extreme|19500' => 19500, // 3.90, 3.90.1, 3.92, 3.95
322 'extreme|19600' => 19600, // 3.90.2, 3.90.3, 3.91, 3.93.1
323 'fast extreme|19500' => 19500, // 3.90, 3.90.1, 3.92, 3.95
324 'fast extreme|19600' => 19600, // 3.90.2, 3.90.3, 3.91, 3.93.1
325 'standard|19000' => 19000,
326 'fast standard|19000' => 19000,
327 'r3mix|19500' => 19500, // 3.90, 3.90.1, 3.92
328 'r3mix|19600' => 19600, // 3.90.2, 3.90.3, 3.91
329 'r3mix|18000' => 18000, // 3.94, 3.95
330 );
331 if (!isset($expected_lowpass[$exploded_options[1].'|'.$thisfile_mpeg_audio_lame['lowpass_frequency']]) && ($thisfile_mpeg_audio_lame['lowpass_frequency'] < 22050) && (round($thisfile_mpeg_audio_lame['lowpass_frequency'] / 1000) < round($thisfile_mpeg_audio['sample_rate'] / 2000))) {
332 $encoder_options .= ' --lowpass '.$thisfile_mpeg_audio_lame['lowpass_frequency'];
333 }
334 break;
335
336 default:
337 break;
338 }
339 break;
340 }
341 }
342
343 if (isset($thisfile_mpeg_audio_lame['raw']['source_sample_freq'])) {
344 if (($thisfile_mpeg_audio['sample_rate'] == 44100) && ($thisfile_mpeg_audio_lame['raw']['source_sample_freq'] != 1)) {
345 $encoder_options .= ' --resample 44100';
346 } elseif (($thisfile_mpeg_audio['sample_rate'] == 48000) && ($thisfile_mpeg_audio_lame['raw']['source_sample_freq'] != 2)) {
347 $encoder_options .= ' --resample 48000';
348 } elseif ($thisfile_mpeg_audio['sample_rate'] < 44100) {
349 switch ($thisfile_mpeg_audio_lame['raw']['source_sample_freq']) {
350 case 0: // <= 32000
351 // may or may not be same as source frequency - ignore
352 break;
353 case 1: // 44100
354 case 2: // 48000
355 case 3: // 48000+
356 $exploded_options = explode(' ', $encoder_options, 4);
357 switch ($exploded_options[0]) {
358 case '--preset':
359 case '--alt-preset':
360 switch ($exploded_options[1]) {
361 case 'fast':
362 case 'portable':
363 case 'medium':
364 case 'standard':
365 case 'extreme':
366 case 'insane':
367 $encoder_options .= ' --resample '.$thisfile_mpeg_audio['sample_rate'];
368 break;
369
370 default:
371 static $expected_resampled_rate = array (
372 'phon+/lw/mw-eu/sw|16000' => 16000,
373 'mw-us|24000' => 24000, // 3.95
374 'mw-us|32000' => 32000, // 3.93
375 'mw-us|16000' => 16000, // 3.92
376 'phone|16000' => 16000,
377 'phone|11025' => 11025, // 3.94a15
378 'radio|32000' => 32000, // 3.94a15
379 'fm/radio|32000' => 32000, // 3.92
380 'fm|32000' => 32000, // 3.90
381 'voice|32000' => 32000);
382 if (!isset($expected_resampled_rate[$exploded_options[1].'|'.$thisfile_mpeg_audio['sample_rate']])) {
383 $encoder_options .= ' --resample '.$thisfile_mpeg_audio['sample_rate'];
384 }
385 break;
386 }
387 break;
388
389 case '--r3mix':
390 default:
391 $encoder_options .= ' --resample '.$thisfile_mpeg_audio['sample_rate'];
392 break;
393 }
394 break;
395 }
396 }
397 }
398 if (empty($encoder_options) && !empty($info['audio']['bitrate']) && !empty($info['audio']['bitrate_mode'])) {
399 //$encoder_options = strtoupper($info['audio']['bitrate_mode']).ceil($info['audio']['bitrate'] / 1000);
400 $encoder_options = strtoupper($info['audio']['bitrate_mode']);
401 }
402
403 return $encoder_options;
404 }
405
406
407
408 public function decodeMPEGaudioHeader($fd, $offset, &$info, $recursive_search=true, $scan_as_cbr=false, $fast_mpeg_header_scan=false) {
409
410 static $mpeg_audio_version_lookup;
411 static $mpeg_audio_layer_lookup;
412 static $mpeg_audio_bitrate_lookup;
413 static $mpeg_audio_frequency_lookup;
414 static $mpeg_audio_channel_mode_lookup;
415 static $mpeg_audio_mode_extension_lookup;
416 static $mpeg_audio_emphasis_lookup;
417 if (empty($mpeg_audio_version_lookup)) {
418 $mpeg_audio_version_lookup = getid3_mp3::MPEGaudioVersionarray();
419 $mpeg_audio_layer_lookup = getid3_mp3::MPEGaudioLayerarray();
420 $mpeg_audio_bitrate_lookup = getid3_mp3::MPEGaudioBitratearray();
421 $mpeg_audio_frequency_lookup = getid3_mp3::MPEGaudioFrequencyarray();
422 $mpeg_audio_channel_mode_lookup = getid3_mp3::MPEGaudioChannelModearray();
423 $mpeg_audio_mode_extension_lookup = getid3_mp3::MPEGaudioModeExtensionarray();
424 $mpeg_audio_emphasis_lookup = getid3_mp3::MPEGaudioEmphasisarray();
425 }
426
427 if ($offset >= $info['avdataend']) {
428
429 // non-fatal error: 'end of file encounter looking for MPEG synch'
430 return;
431
432 }
433 fseek($fd, $offset, SEEK_SET);
434 $header_string = fread($fd, 226); // LAME header at offset 36 + 190 bytes of Xing/LAME data
435
436 // MP3 audio frame structure:
437 // $aa $aa $aa $aa [$bb $bb] $cc...
438 // where $aa..$aa is the four-byte mpeg-audio header (below)
439 // $bb $bb is the optional 2-byte CRC
440 // and $cc... is the audio data
441
442 $head4 = substr($header_string, 0, 4);
443
444 if (isset($mpeg_audio_header_decode_cache[$head4])) {
445 $mpeg_header_raw_array= $mpeg_audio_header_decode_cache[$head4];
446 } else {
447 $mpeg_header_raw_array = getid3_mp3::MPEGaudioHeaderDecode($head4);
448 $mpeg_audio_header_decode_cache[$head4] = $mpeg_header_raw_array;
449 }
450
451 // Not in cache
452 if (!isset($mpeg_audio_header_valid_cache[$head4])) {
453 $mpeg_audio_header_valid_cache[$head4] = getid3_mp3::MPEGaudioHeaderValid($mpeg_header_raw_array, false, false);
454 }
455
456 // shortcut
457 if (!isset($info['mpeg']['audio'])) {
458 $info['mpeg']['audio'] = array ();
459 }
460 $thisfile_mpeg_audio = &$info['mpeg']['audio'];
461
462
463 if ($mpeg_audio_header_valid_cache[$head4]) {
464 $thisfile_mpeg_audio['raw'] = $mpeg_header_raw_array;
465 } else {
466
467 // non-fatal error: Invalid MPEG audio header at offset $offset
468 return;
469 }
470
471 if (!$fast_mpeg_header_scan) {
472
473 $thisfile_mpeg_audio['version'] = $mpeg_audio_version_lookup[$thisfile_mpeg_audio['raw']['version']];
474 $thisfile_mpeg_audio['layer'] = $mpeg_audio_layer_lookup[$thisfile_mpeg_audio['raw']['layer']];
475
476 $thisfile_mpeg_audio['channelmode'] = $mpeg_audio_channel_mode_lookup[$thisfile_mpeg_audio['raw']['channelmode']];
477 $thisfile_mpeg_audio['channels'] = (($thisfile_mpeg_audio['channelmode'] == 'mono') ? 1 : 2);
478 $thisfile_mpeg_audio['sample_rate'] = $mpeg_audio_frequency_lookup[$thisfile_mpeg_audio['version']][$thisfile_mpeg_audio['raw']['sample_rate']];
479 $thisfile_mpeg_audio['protection'] = !$thisfile_mpeg_audio['raw']['protection'];
480 $thisfile_mpeg_audio['private'] = (bool) $thisfile_mpeg_audio['raw']['private'];
481 $thisfile_mpeg_audio['modeextension'] = $mpeg_audio_mode_extension_lookup[$thisfile_mpeg_audio['layer']][$thisfile_mpeg_audio['raw']['modeextension']];
482 $thisfile_mpeg_audio['copyright'] = (bool) $thisfile_mpeg_audio['raw']['copyright'];
483 $thisfile_mpeg_audio['original'] = (bool) $thisfile_mpeg_audio['raw']['original'];
484 $thisfile_mpeg_audio['emphasis'] = $mpeg_audio_emphasis_lookup[$thisfile_mpeg_audio['raw']['emphasis']];
485
486 $info['audio']['channels'] = $thisfile_mpeg_audio['channels'];
487 $info['audio']['sample_rate'] = $thisfile_mpeg_audio['sample_rate'];
488
489 if ($thisfile_mpeg_audio['protection']) {
490 $thisfile_mpeg_audio['crc'] = getid3_lib::BigEndian2Int(substr($header_string, 4, 2));
491 }
492
493 }
494
495 if ($thisfile_mpeg_audio['raw']['bitrate'] == 15) {
496 // http://www.hydrogenaudio.org/?act=ST&f=16&t=9682&st=0
497 $this->getid3->warning('Invalid bitrate index (15), this is a known bug in free-format MP3s encoded by LAME v3.90 - 3.93.1');
498 $thisfile_mpeg_audio['raw']['bitrate'] = 0;
499 }
500 $thisfile_mpeg_audio['padding'] = (bool) $thisfile_mpeg_audio['raw']['padding'];
501 $thisfile_mpeg_audio['bitrate'] = $mpeg_audio_bitrate_lookup[$thisfile_mpeg_audio['version']][$thisfile_mpeg_audio['layer']][$thisfile_mpeg_audio['raw']['bitrate']];
502
503 if (($thisfile_mpeg_audio['bitrate'] == 'free') && ($offset == $info['avdataoffset'])) {
504 // only skip multiple frame check if free-format bitstream found at beginning of file
505 // otherwise is quite possibly simply corrupted data
506 $recursive_search = false;
507 }
508
509 // For Layer 2 there are some combinations of bitrate and mode which are not allowed.
510 if (!$fast_mpeg_header_scan && ($thisfile_mpeg_audio['layer'] == '2')) {
511
512 $info['audio']['dataformat'] = 'mp2';
513 switch ($thisfile_mpeg_audio['channelmode']) {
514
515 case 'mono':
516 if (($thisfile_mpeg_audio['bitrate'] == 'free') || ($thisfile_mpeg_audio['bitrate'] <= 192000)) {
517 // these are ok
518 } else {
519
520 // non-fatal error: bitrate not allowed in Layer 2/mono
521 return;
522 }
523 break;
524
525 case 'stereo':
526 case 'joint stereo':
527 case 'dual channel':
528 if (($thisfile_mpeg_audio['bitrate'] == 'free') || ($thisfile_mpeg_audio['bitrate'] == 64000) || ($thisfile_mpeg_audio['bitrate'] >= 96000)) {
529 // these are ok
530 } else {
531
532 // non-fatal error: bitrate not allowed in Layer 2/stereo/joint stereo/dual channel
533 return;
534 }
535 break;
536
537 }
538
539 }
540
541
542 if ($info['audio']['sample_rate'] > 0) {
543 $thisfile_mpeg_audio['framelength'] = getid3_mp3::MPEGaudioFrameLength($thisfile_mpeg_audio['bitrate'], $thisfile_mpeg_audio['version'], $thisfile_mpeg_audio['layer'], (int) $thisfile_mpeg_audio['padding'], $info['audio']['sample_rate']);
544 }
545
546 $next_frame_test_offset = $offset + 1;
547 if ($thisfile_mpeg_audio['bitrate'] != 'free') {
548
549 $info['audio']['bitrate'] = $thisfile_mpeg_audio['bitrate'];
550
551 if (isset($thisfile_mpeg_audio['framelength'])) {
552 $next_frame_test_offset = $offset + $thisfile_mpeg_audio['framelength'];
553 } else {
554
555 // non-fatal error: Frame at offset('.$offset.') is has an invalid frame length.
556 return;
557 }
558
559 }
560
561 $expected_number_of_audio_bytes = 0;
562
563 ////////////////////////////////////////////////////////////////////////////////////
564 // Variable-bitrate headers
565
566 if (substr($header_string, 4 + 32, 4) == 'VBRI') {
567 // Fraunhofer VBR header is hardcoded 'VBRI' at offset 0x24 (36)
568 // specs taken from http://minnie.tuhs.org/pipermail/mp3encoder/2001-January/001800.html
569
570 $thisfile_mpeg_audio['bitrate_mode'] = 'vbr';
571 $thisfile_mpeg_audio['VBR_method'] = 'Fraunhofer';
572 $info['audio']['codec'] = 'Fraunhofer';
573
574 $side_info_data = substr($header_string, 4 + 2, 32);
575
576 $fraunhofer_vbr_offset = 36;
577
578 $thisfile_mpeg_audio['VBR_encoder_version'] = getid3_lib::BigEndian2Int(substr($header_string, $fraunhofer_vbr_offset + 4, 2)); // VbriVersion
579 $thisfile_mpeg_audio['VBR_encoder_delay'] = getid3_lib::BigEndian2Int(substr($header_string, $fraunhofer_vbr_offset + 6, 2)); // VbriDelay
580 $thisfile_mpeg_audio['VBR_quality'] = getid3_lib::BigEndian2Int(substr($header_string, $fraunhofer_vbr_offset + 8, 2)); // VbriQuality
581 $thisfile_mpeg_audio['VBR_bytes'] = getid3_lib::BigEndian2Int(substr($header_string, $fraunhofer_vbr_offset + 10, 4)); // VbriStreamBytes
582 $thisfile_mpeg_audio['VBR_frames'] = getid3_lib::BigEndian2Int(substr($header_string, $fraunhofer_vbr_offset + 14, 4)); // VbriStreamFrames
583 $thisfile_mpeg_audio['VBR_seek_offsets'] = getid3_lib::BigEndian2Int(substr($header_string, $fraunhofer_vbr_offset + 18, 2)); // VbriTableSize
584 $thisfile_mpeg_audio['VBR_seek_scale'] = getid3_lib::BigEndian2Int(substr($header_string, $fraunhofer_vbr_offset + 20, 2)); // VbriTableScale
585 $thisfile_mpeg_audio['VBR_entry_bytes'] = getid3_lib::BigEndian2Int(substr($header_string, $fraunhofer_vbr_offset + 22, 2)); // VbriEntryBytes
586 $thisfile_mpeg_audio['VBR_entry_frames'] = getid3_lib::BigEndian2Int(substr($header_string, $fraunhofer_vbr_offset + 24, 2)); // VbriEntryFrames
587
588 $expected_number_of_audio_bytes = $thisfile_mpeg_audio['VBR_bytes'];
589
590 $previous_byte_offset = $offset;
591 for ($i = 0; $i < $thisfile_mpeg_audio['VBR_seek_offsets']; $i++) {
592 $fraunhofer_offset_n = getid3_lib::BigEndian2Int(substr($header_string, $fraunhofer_vbr_offset, $thisfile_mpeg_audio['VBR_entry_bytes']));
593 $fraunhofer_vbr_offset += $thisfile_mpeg_audio['VBR_entry_bytes'];
594 $thisfile_mpeg_audio['VBR_offsets_relative'][$i] = ($fraunhofer_offset_n * $thisfile_mpeg_audio['VBR_seek_scale']);
595 $thisfile_mpeg_audio['VBR_offsets_absolute'][$i] = ($fraunhofer_offset_n * $thisfile_mpeg_audio['VBR_seek_scale']) + $previous_byte_offset;
596 $previous_byte_offset += $fraunhofer_offset_n;
597 }
598
599
600 } else {
601
602 // Xing VBR header is hardcoded 'Xing' at a offset 0x0D (13), 0x15 (21) or 0x24 (36)
603 // depending on MPEG layer and number of channels
604
605 $vbr_id_offset = getid3_mp3::XingVBRidOffset($thisfile_mpeg_audio['version'], $thisfile_mpeg_audio['channelmode']);
606 $side_info_data = substr($header_string, 4 + 2, $vbr_id_offset - 4);
607
608 if ((substr($header_string, $vbr_id_offset, strlen('Xing')) == 'Xing') || (substr($header_string, $vbr_id_offset, strlen('Info')) == 'Info')) {
609 // 'Xing' is traditional Xing VBR frame
610 // 'Info' is LAME-encoded CBR (This was done to avoid CBR files to be recognized as traditional Xing VBR files by some decoders.)
611 // 'Info' *can* legally be used to specify a VBR file as well, however.
612
613 // http://www.multiweb.cz/twoinches/MP3inside.htm
614 //00..03 = "Xing" or "Info"
615 //04..07 = Flags:
616 // 0x01 Frames Flag set if value for number of frames in file is stored
617 // 0x02 Bytes Flag set if value for filesize in bytes is stored
618 // 0x04 TOC Flag set if values for TOC are stored
619 // 0x08 VBR Scale Flag set if values for VBR scale is stored
620 //08..11 Frames: Number of frames in file (including the first Xing/Info one)
621 //12..15 Bytes: File length in Bytes
622 //16..115 TOC (Table of Contents):
623 // Contains of 100 indexes (one Byte length) for easier lookup in file. Approximately solves problem with moving inside file.
624 // Each Byte has a value according this formula:
625 // (TOC[i] / 256) * fileLenInBytes
626 // So if song lasts eg. 240 sec. and you want to jump to 60. sec. (and file is 5 000 000 Bytes length) you can use:
627 // TOC[(60/240)*100] = TOC[25]
628 // and corresponding Byte in file is then approximately at:
629 // (TOC[25]/256) * 5000000
630 //116..119 VBR Scale
631
632
633 // should be safe to leave this at 'vbr' and let it be overriden to 'cbr' if a CBR preset/mode is used by LAME
634 $thisfile_mpeg_audio['bitrate_mode'] = 'vbr';
635 $thisfile_mpeg_audio['VBR_method'] = 'Xing';
636
637 $thisfile_mpeg_audio['xing_flags_raw'] = getid3_lib::BigEndian2Int(substr($header_string, $vbr_id_offset + 4, 4));
638
639 $thisfile_mpeg_audio['xing_flags']['frames'] = (bool) ($thisfile_mpeg_audio['xing_flags_raw'] & 0x00000001);
640 $thisfile_mpeg_audio['xing_flags']['bytes'] = (bool) ($thisfile_mpeg_audio['xing_flags_raw'] & 0x00000002);
641 $thisfile_mpeg_audio['xing_flags']['toc'] = (bool) ($thisfile_mpeg_audio['xing_flags_raw'] & 0x00000004);
642 $thisfile_mpeg_audio['xing_flags']['vbr_scale'] = (bool) ($thisfile_mpeg_audio['xing_flags_raw'] & 0x00000008);
643
644 if ($thisfile_mpeg_audio['xing_flags']['frames']) {
645 $thisfile_mpeg_audio['VBR_frames'] = getid3_lib::BigEndian2Int(substr($header_string, $vbr_id_offset + 8, 4));
646 }
647 if ($thisfile_mpeg_audio['xing_flags']['bytes']) {
648 $thisfile_mpeg_audio['VBR_bytes'] = getid3_lib::BigEndian2Int(substr($header_string, $vbr_id_offset + 12, 4));
649 }
650
651 if (!empty($thisfile_mpeg_audio['VBR_frames']) && !empty($thisfile_mpeg_audio['VBR_bytes'])) {
652
653 $frame_lengthfloat = $thisfile_mpeg_audio['VBR_bytes'] / $thisfile_mpeg_audio['VBR_frames'];
654
655 if ($thisfile_mpeg_audio['layer'] == '1') {
656 // BitRate = (((FrameLengthInBytes / 4) - Padding) * SampleRate) / 12
657 $info['audio']['bitrate'] = ($frame_lengthfloat / 4) * $thisfile_mpeg_audio['sample_rate'] * (2 / $info['audio']['channels']) / 12;
658 } else {
659 // Bitrate = ((FrameLengthInBytes - Padding) * SampleRate) / 144
660 $info['audio']['bitrate'] = $frame_lengthfloat * $thisfile_mpeg_audio['sample_rate'] * (2 / $info['audio']['channels']) / 144;
661 }
662 $thisfile_mpeg_audio['framelength'] = floor($frame_lengthfloat);
663 }
664
665 if ($thisfile_mpeg_audio['xing_flags']['toc']) {
666 $lame_toc_data = substr($header_string, $vbr_id_offset + 16, 100);
667 for ($i = 0; $i < 100; $i++) {
668 $thisfile_mpeg_audio['toc'][$i] = ord($lame_toc_data{$i});
669 }
670 }
671 if ($thisfile_mpeg_audio['xing_flags']['vbr_scale']) {
672 $thisfile_mpeg_audio['VBR_scale'] = getid3_lib::BigEndian2Int(substr($header_string, $vbr_id_offset + 116, 4));
673 }
674
675
676 // http://gabriel.mp3-tech.org/mp3infotag.html
677 if (substr($header_string, $vbr_id_offset + 120, 4) == 'LAME') {
678
679 // shortcut
680 $thisfile_mpeg_audio['LAME'] = array ();
681 $thisfile_mpeg_audio_lame = &$thisfile_mpeg_audio['LAME'];
682
683
684 $thisfile_mpeg_audio_lame['long_version'] = substr($header_string, $vbr_id_offset + 120, 20);
685 $thisfile_mpeg_audio_lame['short_version'] = substr($thisfile_mpeg_audio_lame['long_version'], 0, 9);
686
687 if ($thisfile_mpeg_audio_lame['short_version'] >= 'LAME3.90') {
688
689 // extra 11 chars are not part of version string when LAMEtag present
690 unset($thisfile_mpeg_audio_lame['long_version']);
691
692 // It the LAME tag was only introduced in LAME v3.90
693 // http://www.hydrogenaudio.org/?act=ST&f=15&t=9933
694
695 // Offsets of various bytes in http://gabriel.mp3-tech.org/mp3infotag.html
696 // are assuming a 'Xing' identifier offset of 0x24, which is the case for
697 // MPEG-1 non-mono, but not for other combinations
698 $lame_tag_offset_contant = $vbr_id_offset - 0x24;
699
700 // shortcuts
701 $thisfile_mpeg_audio_lame['RGAD'] = array ('track'=>array(), 'album'=>array());
702 $thisfile_mpeg_audio_lame_rgad = &$thisfile_mpeg_audio_lame['RGAD'];
703 $thisfile_mpeg_audio_lame_rgad_track = &$thisfile_mpeg_audio_lame_rgad['track'];
704 $thisfile_mpeg_audio_lame_rgad_album = &$thisfile_mpeg_audio_lame_rgad['album'];
705 $thisfile_mpeg_audio_lame['raw'] = array ();
706 $thisfile_mpeg_audio_lame_raw = &$thisfile_mpeg_audio_lame['raw'];
707
708 // byte $9B VBR Quality
709 // This field is there to indicate a quality level, although the scale was not precised in the original Xing specifications.
710 // Actually overwrites original Xing bytes
711 unset($thisfile_mpeg_audio['VBR_scale']);
712 $thisfile_mpeg_audio_lame['vbr_quality'] = getid3_lib::BigEndian2Int(substr($header_string, $lame_tag_offset_contant + 0x9B, 1));
713
714 // bytes $9C-$A4 Encoder short VersionString
715 $thisfile_mpeg_audio_lame['short_version'] = substr($header_string, $lame_tag_offset_contant + 0x9C, 9);
716
717 // byte $A5 Info Tag revision + VBR method
718 $lame_tagRevisionVBRmethod = getid3_lib::BigEndian2Int(substr($header_string, $lame_tag_offset_contant + 0xA5, 1));
719
720 $thisfile_mpeg_audio_lame['tag_revision'] = ($lame_tagRevisionVBRmethod & 0xF0) >> 4;
721 $thisfile_mpeg_audio_lame_raw['vbr_method'] = $lame_tagRevisionVBRmethod & 0x0F;
722 $thisfile_mpeg_audio_lame['vbr_method'] = getid3_mp3::LAMEvbrMethodLookup($thisfile_mpeg_audio_lame_raw['vbr_method']);
723 $thisfile_mpeg_audio['bitrate_mode'] = substr($thisfile_mpeg_audio_lame['vbr_method'], 0, 3); // usually either 'cbr' or 'vbr', but truncates 'vbr-old / vbr-rh' to 'vbr'
724
725 // byte $A6 Lowpass filter value
726 $thisfile_mpeg_audio_lame['lowpass_frequency'] = getid3_lib::BigEndian2Int(substr($header_string, $lame_tag_offset_contant + 0xA6, 1)) * 100;
727
728 // bytes $A7-$AE Replay Gain
729 // http://privatewww.essex.ac.uk/~djmrob/replaygain/rg_data_format.html
730 // bytes $A7-$AA : 32 bit floating point "Peak signal amplitude"
731 if ($thisfile_mpeg_audio_lame['short_version'] >= 'LAME3.94b') {
732 // LAME 3.94a16 and later - 9.23 fixed point
733 // ie 0x0059E2EE / (2^23) = 5890798 / 8388608 = 0.7022378444671630859375
734 $thisfile_mpeg_audio_lame_rgad['peak_amplitude'] = (float) ((getid3_lib::BigEndian2Int(substr($header_string, $lame_tag_offset_contant + 0xA7, 4))) / 8388608);
735 } else {
736 // LAME 3.94a15 and earlier - 32-bit floating point
737 // Actually 3.94a16 will fall in here too and be WRONG, but is hard to detect 3.94a16 vs 3.94a15
738 $thisfile_mpeg_audio_lame_rgad['peak_amplitude'] = getid3_lib::LittleEndian2Float(substr($header_string, $lame_tag_offset_contant + 0xA7, 4));
739 }
740 if ($thisfile_mpeg_audio_lame_rgad['peak_amplitude'] == 0) {
741 unset($thisfile_mpeg_audio_lame_rgad['peak_amplitude']);
742 } else {
743 $thisfile_mpeg_audio_lame_rgad['peak_db'] = 20 * log10($thisfile_mpeg_audio_lame_rgad['peak_amplitude']);
744 }
745
746 $thisfile_mpeg_audio_lame_raw['RGAD_track'] = getid3_lib::BigEndian2Int(substr($header_string, $lame_tag_offset_contant + 0xAB, 2));
747 $thisfile_mpeg_audio_lame_raw['RGAD_album'] = getid3_lib::BigEndian2Int(substr($header_string, $lame_tag_offset_contant + 0xAD, 2));
748
749
750 if ($thisfile_mpeg_audio_lame_raw['RGAD_track'] != 0) {
751
752 $thisfile_mpeg_audio_lame_rgad_track['raw']['name'] = ($thisfile_mpeg_audio_lame_raw['RGAD_track'] & 0xE000) >> 13;
753 $thisfile_mpeg_audio_lame_rgad_track['raw']['originator'] = ($thisfile_mpeg_audio_lame_raw['RGAD_track'] & 0x1C00) >> 10;
754 $thisfile_mpeg_audio_lame_rgad_track['raw']['sign_bit'] = ($thisfile_mpeg_audio_lame_raw['RGAD_track'] & 0x0200) >> 9;
755 $thisfile_mpeg_audio_lame_rgad_track['raw']['gain_adjust'] = $thisfile_mpeg_audio_lame_raw['RGAD_track'] & 0x01FF;
756 $thisfile_mpeg_audio_lame_rgad_track['name'] = getid3_lib_replaygain::NameLookup($thisfile_mpeg_audio_lame_rgad_track['raw']['name']);
757 $thisfile_mpeg_audio_lame_rgad_track['originator'] = getid3_lib_replaygain::OriginatorLookup($thisfile_mpeg_audio_lame_rgad_track['raw']['originator']);
758 $thisfile_mpeg_audio_lame_rgad_track['gain_db'] = getid3_lib_replaygain::AdjustmentLookup($thisfile_mpeg_audio_lame_rgad_track['raw']['gain_adjust'], $thisfile_mpeg_audio_lame_rgad_track['raw']['sign_bit']);
759
760 if (!empty($thisfile_mpeg_audio_lame_rgad['peak_amplitude'])) {
761 $info['replay_gain']['track']['peak'] = $thisfile_mpeg_audio_lame_rgad['peak_amplitude'];
762 }
763 $info['replay_gain']['track']['originator'] = $thisfile_mpeg_audio_lame_rgad_track['originator'];
764 $info['replay_gain']['track']['adjustment'] = $thisfile_mpeg_audio_lame_rgad_track['gain_db'];
765 } else {
766 unset($thisfile_mpeg_audio_lame_rgad['track']);
767 }
768 if ($thisfile_mpeg_audio_lame_raw['RGAD_album'] != 0) {
769
770 $thisfile_mpeg_audio_lame_rgad_album['raw']['name'] = ($thisfile_mpeg_audio_lame_raw['RGAD_album'] & 0xE000) >> 13;
771 $thisfile_mpeg_audio_lame_rgad_album['raw']['originator'] = ($thisfile_mpeg_audio_lame_raw['RGAD_album'] & 0x1C00) >> 10;
772 $thisfile_mpeg_audio_lame_rgad_album['raw']['sign_bit'] = ($thisfile_mpeg_audio_lame_raw['RGAD_album'] & 0x0200) >> 9;
773 $thisfile_mpeg_audio_lame_rgad_album['raw']['gain_adjust'] = $thisfile_mpeg_audio_lame_raw['RGAD_album'] & 0x01FF;
774 $thisfile_mpeg_audio_lame_rgad_album['name'] = getid3_lib_replaygain::NameLookup($thisfile_mpeg_audio_lame_rgad_album['raw']['name']);
775 $thisfile_mpeg_audio_lame_rgad_album['originator'] = getid3_lib_replaygain::OriginatorLookup($thisfile_mpeg_audio_lame_rgad_album['raw']['originator']);
776 $thisfile_mpeg_audio_lame_rgad_album['gain_db'] = getid3_lib_replaygain::AdjustmentLookup($thisfile_mpeg_audio_lame_rgad_album['raw']['gain_adjust'], $thisfile_mpeg_audio_lame_rgad_album['raw']['sign_bit']);
777
778 if (!empty($thisfile_mpeg_audio_lame_rgad['peak_amplitude'])) {
779 $info['replay_gain']['album']['peak'] = $thisfile_mpeg_audio_lame_rgad['peak_amplitude'];
780 }
781 $info['replay_gain']['album']['originator'] = $thisfile_mpeg_audio_lame_rgad_album['originator'];
782 $info['replay_gain']['album']['adjustment'] = $thisfile_mpeg_audio_lame_rgad_album['gain_db'];
783 } else {
784 unset($thisfile_mpeg_audio_lame_rgad['album']);
785 }
786 if (empty($thisfile_mpeg_audio_lame_rgad)) {
787 unset($thisfile_mpeg_audio_lame['RGAD']);
788 }
789
790
791 // byte $AF Encoding flags + ATH Type
792 $encoding_flags_ath_type = getid3_lib::BigEndian2Int(substr($header_string, $lame_tag_offset_contant + 0xAF, 1));
793 $thisfile_mpeg_audio_lame['encoding_flags']['nspsytune'] = (bool) ($encoding_flags_ath_type & 0x10);
794 $thisfile_mpeg_audio_lame['encoding_flags']['nssafejoint'] = (bool) ($encoding_flags_ath_type & 0x20);
795 $thisfile_mpeg_audio_lame['encoding_flags']['nogap_next'] = (bool) ($encoding_flags_ath_type & 0x40);
796 $thisfile_mpeg_audio_lame['encoding_flags']['nogap_prev'] = (bool) ($encoding_flags_ath_type & 0x80);
797 $thisfile_mpeg_audio_lame['ath_type'] = $encoding_flags_ath_type & 0x0F;
798
799 // byte $B0 if ABR {specified bitrate} else {minimal bitrate}
800 $thisfile_mpeg_audio_lame['raw']['abrbitrate_minbitrate'] = getid3_lib::BigEndian2Int(substr($header_string, $lame_tag_offset_contant + 0xB0, 1));
801 if ($thisfile_mpeg_audio_lame_raw['vbr_method'] == 2) { // Average BitRate (ABR)
802 $thisfile_mpeg_audio_lame['bitrate_abr'] = $thisfile_mpeg_audio_lame['raw']['abrbitrate_minbitrate'];
803 } elseif ($thisfile_mpeg_audio_lame_raw['vbr_method'] == 1) { // Constant BitRate (CBR)
804 // ignore
805 } elseif ($thisfile_mpeg_audio_lame['raw']['abrbitrate_minbitrate'] > 0) { // Variable BitRate (VBR) - minimum bitrate
806 $thisfile_mpeg_audio_lame['bitrate_min'] = $thisfile_mpeg_audio_lame['raw']['abrbitrate_minbitrate'];
807 }
808
809 // bytes $B1-$B3 Encoder delays
810 $encoder_delays = getid3_lib::BigEndian2Int(substr($header_string, $lame_tag_offset_contant + 0xB1, 3));
811 $thisfile_mpeg_audio_lame['encoder_delay'] = ($encoder_delays & 0xFFF000) >> 12;
812 $thisfile_mpeg_audio_lame['end_padding'] = $encoder_delays & 0x000FFF;
813
814 // byte $B4 Misc
815 $misc_byte = getid3_lib::BigEndian2Int(substr($header_string, $lame_tag_offset_contant + 0xB4, 1));
816 $thisfile_mpeg_audio_lame_raw['noise_shaping'] = ($misc_byte & 0x03);
817 $thisfile_mpeg_audio_lame_raw['stereo_mode'] = ($misc_byte & 0x1C) >> 2;
818 $thisfile_mpeg_audio_lame_raw['not_optimal_quality'] = ($misc_byte & 0x20) >> 5;
819 $thisfile_mpeg_audio_lame_raw['source_sample_freq'] = ($misc_byte & 0xC0) >> 6;
820 $thisfile_mpeg_audio_lame['noise_shaping'] = $thisfile_mpeg_audio_lame_raw['noise_shaping'];
821 $thisfile_mpeg_audio_lame['stereo_mode'] = getid3_mp3::LAMEmiscStereoModeLookup($thisfile_mpeg_audio_lame_raw['stereo_mode']);
822 $thisfile_mpeg_audio_lame['not_optimal_quality'] = (bool) $thisfile_mpeg_audio_lame_raw['not_optimal_quality'];
823 $thisfile_mpeg_audio_lame['source_sample_freq'] = getid3_mp3::LAMEmiscSourceSampleFrequencyLookup($thisfile_mpeg_audio_lame_raw['source_sample_freq']);
824
825 // byte $B5 MP3 Gain
826 $thisfile_mpeg_audio_lame_raw['mp3_gain'] = getid3_lib::BigEndian2Int(substr($header_string, $lame_tag_offset_contant + 0xB5, 1), false, true);
827 $thisfile_mpeg_audio_lame['mp3_gain_db'] = (20 * log10(2) / 4) * $thisfile_mpeg_audio_lame_raw['mp3_gain'];
828 $thisfile_mpeg_audio_lame['mp3_gain_factor'] = pow(2, ($thisfile_mpeg_audio_lame['mp3_gain_db'] / 6));
829
830 // bytes $B6-$B7 Preset and surround info
831 $PresetSurroundBytes = getid3_lib::BigEndian2Int(substr($header_string, $lame_tag_offset_contant + 0xB6, 2));
832 // Reserved = ($PresetSurroundBytes & 0xC000);
833 $thisfile_mpeg_audio_lame_raw['surround_info'] = ($PresetSurroundBytes & 0x3800);
834 $thisfile_mpeg_audio_lame['surround_info'] = getid3_mp3::LAMEsurroundInfoLookup($thisfile_mpeg_audio_lame_raw['surround_info']);
835 $thisfile_mpeg_audio_lame['preset_used_id'] = ($PresetSurroundBytes & 0x07FF);
836 $thisfile_mpeg_audio_lame['preset_used'] = getid3_mp3::LAMEpresetUsedLookup($thisfile_mpeg_audio_lame);
837 if (!empty($thisfile_mpeg_audio_lame['preset_used_id']) && empty($thisfile_mpeg_audio_lame['preset_used'])) {
838 $this->getid3->warning('Unknown LAME preset used ('.$thisfile_mpeg_audio_lame['preset_used_id'].') - please report to info@getid3.org');
839 }
840 if (($thisfile_mpeg_audio_lame['short_version'] == 'LAME3.90.') && !empty($thisfile_mpeg_audio_lame['preset_used_id'])) {
841 // this may change if 3.90.4 ever comes out
842 $thisfile_mpeg_audio_lame['short_version'] = 'LAME3.90.3';
843 }
844
845 // bytes $B8-$BB MusicLength
846 $thisfile_mpeg_audio_lame['audio_bytes'] = getid3_lib::BigEndian2Int(substr($header_string, $lame_tag_offset_contant + 0xB8, 4));
847 $expected_number_of_audio_bytes = (($thisfile_mpeg_audio_lame['audio_bytes'] > 0) ? $thisfile_mpeg_audio_lame['audio_bytes'] : $thisfile_mpeg_audio['VBR_bytes']);
848
849 // bytes $BC-$BD MusicCRC
850 $thisfile_mpeg_audio_lame['music_crc'] = getid3_lib::BigEndian2Int(substr($header_string, $lame_tag_offset_contant + 0xBC, 2));
851
852 // bytes $BE-$BF CRC-16 of Info Tag
853 $thisfile_mpeg_audio_lame['lame_tag_crc'] = getid3_lib::BigEndian2Int(substr($header_string, $lame_tag_offset_contant + 0xBE, 2));
854
855
856 // LAME CBR
857 if ($thisfile_mpeg_audio_lame_raw['vbr_method'] == 1) {
858
859 $thisfile_mpeg_audio['bitrate_mode'] = 'cbr';
860 $thisfile_mpeg_audio['bitrate'] = getid3_mp3::ClosestStandardMP3Bitrate($thisfile_mpeg_audio['bitrate']);
861 $info['audio']['bitrate'] = $thisfile_mpeg_audio['bitrate'];
862
863 }
864
865 }
866 }
867
868 } else {
869
870 // not Fraunhofer or Xing VBR methods, most likely CBR (but could be VBR with no header)
871 $thisfile_mpeg_audio['bitrate_mode'] = 'cbr';
872 if ($recursive_search) {
873 $thisfile_mpeg_audio['bitrate_mode'] = 'vbr';
874 if (getid3_mp3::RecursiveFrameScanning($fd, $info, $offset, $next_frame_test_offset, true)) {
875 $recursive_search = false;
876 $thisfile_mpeg_audio['bitrate_mode'] = 'cbr';
877 }
878 if ($thisfile_mpeg_audio['bitrate_mode'] == 'vbr') {
879 $this->getid3->warning('VBR file with no VBR header. Bitrate values calculated from actual frame bitrates.');
880 }
881 }
882
883 }
884
885 }
886
887 if (($expected_number_of_audio_bytes > 0) && ($expected_number_of_audio_bytes != ($info['avdataend'] - $info['avdataoffset']))) {
888 if ($expected_number_of_audio_bytes > ($info['avdataend'] - $info['avdataoffset'])) {
889 if (($expected_number_of_audio_bytes - ($info['avdataend'] - $info['avdataoffset'])) == 1) {
890 $this->getid3->warning('Last byte of data truncated (this is a known bug in Meracl ID3 Tag Writer before v1.3.5)');
891 } else {
892 $this->getid3->warning('Probable truncated file: expecting '.$expected_number_of_audio_bytes.' bytes of audio data, only found '.($info['avdataend'] - $info['avdataoffset']).' (short by '.($expected_number_of_audio_bytes - ($info['avdataend'] - $info['avdataoffset'])).' bytes)');
893 }
894 } else {
895 if ((($info['avdataend'] - $info['avdataoffset']) - $expected_number_of_audio_bytes) == 1) {
896 $info['avdataend']--;
897 } else {
898 $this->getid3->warning('Too much data in file: expecting '.$expected_number_of_audio_bytes.' bytes of audio data, found '.($info['avdataend'] - $info['avdataoffset']).' ('.(($info['avdataend'] - $info['avdataoffset']) - $expected_number_of_audio_bytes).' bytes too many)');
899 }
900 }
901 }
902
903 if (($thisfile_mpeg_audio['bitrate'] == 'free') && empty($info['audio']['bitrate'])) {
904 if (($offset == $info['avdataoffset']) && empty($thisfile_mpeg_audio['VBR_frames'])) {
905 $frame_byte_length = getid3_mp3::FreeFormatFrameLength($fd, $offset, $info, true);
906 if ($frame_byte_length > 0) {
907 $thisfile_mpeg_audio['framelength'] = $frame_byte_length;
908 if ($thisfile_mpeg_audio['layer'] == '1') {
909 // BitRate = (((FrameLengthInBytes / 4) - Padding) * SampleRate) / 12
910 $info['audio']['bitrate'] = ((($frame_byte_length / 4) - intval($thisfile_mpeg_audio['padding'])) * $thisfile_mpeg_audio['sample_rate']) / 12;
911 } else {
912 // Bitrate = ((FrameLengthInBytes - Padding) * SampleRate) / 144
913 $info['audio']['bitrate'] = (($frame_byte_length - intval($thisfile_mpeg_audio['padding'])) * $thisfile_mpeg_audio['sample_rate']) / 144;
914 }
915 } else {
916
917 // non-fatal error: Error calculating frame length of free-format MP3 without Xing/LAME header.
918 return;
919 }
920 }
921 }
922
923 if (@$thisfile_mpeg_audio['VBR_frames']) {
924 switch ($thisfile_mpeg_audio['bitrate_mode']) {
925 case 'vbr':
926 case 'abr':
927 if (($thisfile_mpeg_audio['version'] == '1') && ($thisfile_mpeg_audio['layer'] == 1)) {
928 $thisfile_mpeg_audio['VBR_bitrate'] = ((@$thisfile_mpeg_audio['VBR_bytes'] / $thisfile_mpeg_audio['VBR_frames']) * 8) * ($info['audio']['sample_rate'] / 384);
929 } elseif ((($thisfile_mpeg_audio['version'] == '2') || ($thisfile_mpeg_audio['version'] == '2.5')) && ($thisfile_mpeg_audio['layer'] == 3)) {
930 $thisfile_mpeg_audio['VBR_bitrate'] = ((@$thisfile_mpeg_audio['VBR_bytes'] / $thisfile_mpeg_audio['VBR_frames']) * 8) * ($info['audio']['sample_rate'] / 576);
931 } else {
932 $thisfile_mpeg_audio['VBR_bitrate'] = ((@$thisfile_mpeg_audio['VBR_bytes'] / $thisfile_mpeg_audio['VBR_frames']) * 8) * ($info['audio']['sample_rate'] / 1152);
933 }
934 if ($thisfile_mpeg_audio['VBR_bitrate'] > 0) {
935 $info['audio']['bitrate'] = $thisfile_mpeg_audio['VBR_bitrate'];
936 $thisfile_mpeg_audio['bitrate'] = $thisfile_mpeg_audio['VBR_bitrate']; // to avoid confusion
937 }
938 break;
939 }
940 }
941
942 // End variable-bitrate headers
943 ////////////////////////////////////////////////////////////////////////////////////
944
945 if ($recursive_search) {
946
947 if (!getid3_mp3::RecursiveFrameScanning($fd, $info, $offset, $next_frame_test_offset, $scan_as_cbr)) {
948 return false;
949 }
950
951 }
952
953 return true;
954 }
955
956
957
958 public function RecursiveFrameScanning(&$fd, &$info, &$offset, &$next_frame_test_offset, $scan_as_cbr) {
959 for ($i = 0; $i < getid3_mp3::VALID_CHECK_FRAMES; $i++) {
960 // check next getid3_mp3::VALID_CHECK_FRAMES frames for validity, to make sure we haven't run across a false synch
961 if (($next_frame_test_offset + 4) >= $info['avdataend']) {
962 // end of file
963 return true;
964 }
965
966 $next_frame_test_array = array ('avdataend' => $info['avdataend'], 'avdataoffset' => $info['avdataoffset']);
967 if ($this->decodeMPEGaudioHeader($fd, $next_frame_test_offset, $next_frame_test_array, false)) {
968 if ($scan_as_cbr) {
969 // force CBR mode, used for trying to pick out invalid audio streams with
970 // valid(?) VBR headers, or VBR streams with no VBR header
971 if (!isset($next_frame_test_array['mpeg']['audio']['bitrate']) || !isset($info['mpeg']['audio']['bitrate']) || ($next_frame_test_array['mpeg']['audio']['bitrate'] != $info['mpeg']['audio']['bitrate'])) {
972 return false;
973 }
974 }
975
976
977 // next frame is OK, get ready to check the one after that
978 if (isset($next_frame_test_array['mpeg']['audio']['framelength']) && ($next_frame_test_array['mpeg']['audio']['framelength'] > 0)) {
979 $next_frame_test_offset += $next_frame_test_array['mpeg']['audio']['framelength'];
980 } else {
981
982 // non-fatal error: Frame at offset $offset has an invalid frame length.
983 return;
984 }
985
986 } else {
987
988 // non-fatal error: Next frame is not valid.
989 return;
990 }
991 }
992 return true;
993 }
994
995
996
997 public function FreeFormatFrameLength($fd, $offset, &$info, $deep_scan=false) {
998 fseek($fd, $offset, SEEK_SET);
999 $mpeg_audio_data = fread($fd, 32768);
1000
1001 $sync_pattern1 = substr($mpeg_audio_data, 0, 4);
1002 // may be different pattern due to padding
1003 $sync_pattern2 = $sync_pattern1{0}.$sync_pattern1{1}.chr(ord($sync_pattern1{2}) | 0x02).$sync_pattern1{3};
1004 if ($sync_pattern2 === $sync_pattern1) {
1005 $sync_pattern2 = $sync_pattern1{0}.$sync_pattern1{1}.chr(ord($sync_pattern1{2}) & 0xFD).$sync_pattern1{3};
1006 }
1007
1008 $frame_length = false;
1009 $frame_length1 = strpos($mpeg_audio_data, $sync_pattern1, 4);
1010 $frame_length2 = strpos($mpeg_audio_data, $sync_pattern2, 4);
1011 if ($frame_length1 > 4) {
1012 $frame_length = $frame_length1;
1013 }
1014 if (($frame_length2 > 4) && ($frame_length2 < $frame_length1)) {
1015 $frame_length = $frame_length2;
1016 }
1017 if (!$frame_length) {
1018
1019 // LAME 3.88 has a different value for modeextension on the first frame vs the rest
1020 $frame_length1 = strpos($mpeg_audio_data, substr($sync_pattern1, 0, 3), 4);
1021 $frame_length2 = strpos($mpeg_audio_data, substr($sync_pattern2, 0, 3), 4);
1022
1023 if ($frame_length1 > 4) {
1024 $frame_length = $frame_length1;
1025 }
1026 if (($frame_length2 > 4) && ($frame_length2 < $frame_length1)) {
1027 $frame_length = $frame_length2;
1028 }
1029 if (!$frame_length) {
1030 throw new getid3_exception('Cannot find next free-format synch pattern ('.getid3_lib::PrintHexBytes($sync_pattern1).' or '.getid3_lib::PrintHexBytes($sync_pattern2).') after offset '.$offset);
1031 } else {
1032 $this->getid3->warning('ModeExtension varies between first frame and other frames (known free-format issue in LAME 3.88)');
1033 $info['audio']['codec'] = 'LAME';
1034 $info['audio']['encoder'] = 'LAME3.88';
1035 $sync_pattern1 = substr($sync_pattern1, 0, 3);
1036 $sync_pattern2 = substr($sync_pattern2, 0, 3);
1037 }
1038 }
1039
1040 if ($deep_scan) {
1041
1042 $actual_frame_length_values = array ();
1043 $next_offset = $offset + $frame_length;
1044 while ($next_offset < ($info['avdataend'] - 6)) {
1045 fseek($fd, $next_offset - 1, SEEK_SET);
1046 $NextSyncPattern = fread($fd, 6);
1047 if ((substr($NextSyncPattern, 1, strlen($sync_pattern1)) == $sync_pattern1) || (substr($NextSyncPattern, 1, strlen($sync_pattern2)) == $sync_pattern2)) {
1048 // good - found where expected
1049 $actual_frame_length_values[] = $frame_length;
1050 } elseif ((substr($NextSyncPattern, 0, strlen($sync_pattern1)) == $sync_pattern1) || (substr($NextSyncPattern, 0, strlen($sync_pattern2)) == $sync_pattern2)) {
1051 // ok - found one byte earlier than expected (last frame wasn't padded, first frame was)
1052 $actual_frame_length_values[] = ($frame_length - 1);
1053 $next_offset--;
1054 } elseif ((substr($NextSyncPattern, 2, strlen($sync_pattern1)) == $sync_pattern1) || (substr($NextSyncPattern, 2, strlen($sync_pattern2)) == $sync_pattern2)) {
1055 // ok - found one byte later than expected (last frame was padded, first frame wasn't)
1056 $actual_frame_length_values[] = ($frame_length + 1);
1057 $next_offset++;
1058 } else {
1059 throw new getid3_exception('Did not find expected free-format sync pattern at offset '.$next_offset);
1060 }
1061 $next_offset += $frame_length;
1062 }
1063 if (count($actual_frame_length_values) > 0) {
1064 $frame_length = intval(round(array_sum($actual_frame_length_values) / count($actual_frame_length_values)));
1065 }
1066 }
1067 return $frame_length;
1068 }
1069
1070
1071
1072 public function getOnlyMPEGaudioInfo($fd, &$info, $avdata_offset, $bit_rate_histogram=false) {
1073
1074 // looks for synch, decodes MPEG audio header
1075
1076 fseek($fd, $avdata_offset, SEEK_SET);
1077
1078 $sync_seek_buffer_size = min(128 * 1024, $info['avdataend'] - $avdata_offset);
1079 $header = fread($fd, $sync_seek_buffer_size);
1080 $sync_seek_buffer_size = strlen($header);
1081 $synch_seek_offset = 0;
1082
1083 static $mpeg_audio_version_lookup;
1084 static $mpeg_audio_layer_lookup;
1085 static $mpeg_audio_bitrate_lookup;
1086 if (empty($mpeg_audio_version_lookup)) {
1087 $mpeg_audio_version_lookup = getid3_mp3::MPEGaudioVersionarray();
1088 $mpeg_audio_layer_lookup = getid3_mp3::MPEGaudioLayerarray();
1089 $mpeg_audio_bitrate_lookup = getid3_mp3::MPEGaudioBitratearray();
1090
1091 }
1092
1093 while ($synch_seek_offset < $sync_seek_buffer_size) {
1094
1095 if ((($avdata_offset + $synch_seek_offset) < $info['avdataend']) && !feof($fd)) {
1096
1097 // if a synch's not found within the first 128k bytes, then give up
1098 if ($synch_seek_offset > $sync_seek_buffer_size) {
1099 throw new getid3_exception('Could not find valid MPEG audio synch within the first '.round($sync_seek_buffer_size / 1024).'kB');
1100 }
1101
1102 if (feof($fd)) {
1103 throw new getid3_exception('Could not find valid MPEG audio synch before end of file');
1104 }
1105 }
1106
1107 if (($synch_seek_offset + 1) >= strlen($header)) {
1108 throw new getid3_exception('Could not find valid MPEG synch before end of file');
1109 }
1110
1111 if (($header{$synch_seek_offset} == "\xFF") && ($header{($synch_seek_offset + 1)} > "\xE0")) { // synch detected
1112
1113 if (!isset($first_frame_info) && !isset($info['mpeg']['audio'])) {
1114 $first_frame_info = $info;
1115 $first_frame_avdata_offset = $avdata_offset + $synch_seek_offset;
1116 if (!getid3_mp3::decodeMPEGaudioHeader($fd, $avdata_offset + $synch_seek_offset, $first_frame_info, false)) {
1117 // if this is the first valid MPEG-audio frame, save it in case it's a VBR header frame and there's
1118 // garbage between this frame and a valid sequence of MPEG-audio frames, to be restored below
1119 unset($first_frame_info);
1120 }
1121 }
1122
1123 $dummy = $info; // only overwrite real data if valid header found
1124 if (getid3_mp3::decodeMPEGaudioHeader($fd, $avdata_offset + $synch_seek_offset, $dummy, true)) {
1125 $info = $dummy;
1126 $info['avdataoffset'] = $avdata_offset + $synch_seek_offset;
1127
1128 switch (@$info['fileformat']) {
1129 case '':
1130 case 'mp3':
1131 $info['fileformat'] = 'mp3';
1132 $info['audio']['dataformat'] = 'mp3';
1133 break;
1134 }
1135 if (isset($first_frame_info['mpeg']['audio']['bitrate_mode']) && ($first_frame_info['mpeg']['audio']['bitrate_mode'] == 'vbr')) {
1136 if (!(abs($info['audio']['bitrate'] - $first_frame_info['audio']['bitrate']) <= 1)) {
1137 // If there is garbage data between a valid VBR header frame and a sequence
1138 // of valid MPEG-audio frames the VBR data is no longer discarded.
1139 $info = $first_frame_info;
1140 $info['avdataoffset'] = $first_frame_avdata_offset;
1141 $info['fileformat'] = 'mp3';
1142 $info['audio']['dataformat'] = 'mp3';
1143 $dummy = $info;
1144 unset($dummy['mpeg']['audio']);
1145 $GarbageOffsetStart = $first_frame_avdata_offset + $first_frame_info['mpeg']['audio']['framelength'];
1146 $GarbageOffsetEnd = $avdata_offset + $synch_seek_offset;
1147 if (getid3_mp3::decodeMPEGaudioHeader($fd, $GarbageOffsetEnd, $dummy, true, true)) {
1148
1149 $info = $dummy;
1150 $info['avdataoffset'] = $GarbageOffsetEnd;
1151 $this->getid3->warning('apparently-valid VBR header not used because could not find '.getid3_mp3::VALID_CHECK_FRAMES.' consecutive MPEG-audio frames immediately after VBR header (garbage data for '.($GarbageOffsetEnd - $GarbageOffsetStart).' bytes between '.$GarbageOffsetStart.' and '.$GarbageOffsetEnd.'), but did find valid CBR stream starting at '.$GarbageOffsetEnd);
1152
1153 } else {
1154
1155 $this->getid3->warning('using data from VBR header even though could not find '.getid3_mp3::VALID_CHECK_FRAMES.' consecutive MPEG-audio frames immediately after VBR header (garbage data for '.($GarbageOffsetEnd - $GarbageOffsetStart).' bytes between '.$GarbageOffsetStart.' and '.$GarbageOffsetEnd.')');
1156
1157 }
1158 }
1159 }
1160 if (isset($info['mpeg']['audio']['bitrate_mode']) && ($info['mpeg']['audio']['bitrate_mode'] == 'vbr') && !isset($info['mpeg']['audio']['VBR_method'])) {
1161 // VBR file with no VBR header
1162 $bit_rate_histogram = true;
1163 }
1164
1165 if ($bit_rate_histogram) {
1166
1167 $info['mpeg']['audio']['stereo_distribution'] = array ('stereo'=>0, 'joint stereo'=>0, 'dual channel'=>0, 'mono'=>0);
1168 $info['mpeg']['audio']['version_distribution'] = array ('1'=>0, '2'=>0, '2.5'=>0);
1169
1170 if ($info['mpeg']['audio']['version'] == '1') {
1171 if ($info['mpeg']['audio']['layer'] == 3) {
1172 $info['mpeg']['audio']['bitrate_distribution'] = array ('free'=>0, 32000=>0, 40000=>0, 48000=>0, 56000=>0, 64000=>0, 80000=>0, 96000=>0, 112000=>0, 128000=>0, 160000=>0, 192000=>0, 224000=>0, 256000=>0, 320000=>0);
1173 } elseif ($info['mpeg']['audio']['layer'] == 2) {
1174 $info['mpeg']['audio']['bitrate_distribution'] = array ('free'=>0, 32000=>0, 48000=>0, 56000=>0, 64000=>0, 80000=>0, 96000=>0, 112000=>0, 128000=>0, 160000=>0, 192000=>0, 224000=>0, 256000=>0, 320000=>0, 384000=>0);
1175 } elseif ($info['mpeg']['audio']['layer'] == 1) {
1176 $info['mpeg']['audio']['bitrate_distribution'] = array ('free'=>0, 32000=>0, 64000=>0, 96000=>0, 128000=>0, 160000=>0, 192000=>0, 224000=>0, 256000=>0, 288000=>0, 320000=>0, 352000=>0, 384000=>0, 416000=>0, 448000=>0);
1177 }
1178 } elseif ($info['mpeg']['audio']['layer'] == 1) {
1179 $info['mpeg']['audio']['bitrate_distribution'] = array ('free'=>0, 32000=>0, 48000=>0, 56000=>0, 64000=>0, 80000=>0, 96000=>0, 112000=>0, 128000=>0, 144000=>0, 160000=>0, 176000=>0, 192000=>0, 224000=>0, 256000=>0);
1180 } else {
1181 $info['mpeg']['audio']['bitrate_distribution'] = array ('free'=>0, 8000=>0, 16000=>0, 24000=>0, 32000=>0, 40000=>0, 48000=>0, 56000=>0, 64000=>0, 80000=>0, 96000=>0, 112000=>0, 128000=>0, 144000=>0, 160000=>0);
1182 }
1183
1184 $dummy = array ('avdataend' => $info['avdataend'], 'avdataoffset' => $info['avdataoffset']);
1185 $synch_start_offset = $info['avdataoffset'];
1186
1187 $fast_mode = false;
1188 $synch_errors_found = 0;
1189 while ($this->decodeMPEGaudioHeader($fd, $synch_start_offset, $dummy, false, false, $fast_mode)) {
1190 $fast_mode = true;
1191 $thisframebitrate = $mpeg_audio_bitrate_lookup[$mpeg_audio_version_lookup[$dummy['mpeg']['audio']['raw']['version']]][$mpeg_audio_layer_lookup[$dummy['mpeg']['audio']['raw']['layer']]][$dummy['mpeg']['audio']['raw']['bitrate']];
1192
1193 if (empty($dummy['mpeg']['audio']['framelength'])) {
1194 $synch_errors_found++;
1195 }
1196 else {
1197 @$info['mpeg']['audio']['bitrate_distribution'][$thisframebitrate]++;
1198 @$info['mpeg']['audio']['stereo_distribution'][$dummy['mpeg']['audio']['channelmode']]++;
1199 @$info['mpeg']['audio']['version_distribution'][$dummy['mpeg']['audio']['version']]++;
1200
1201 $synch_start_offset += $dummy['mpeg']['audio']['framelength'];
1202 }
1203 }
1204 if ($synch_errors_found > 0) {
1205 $this->getid3->warning('Found '.$synch_errors_found.' synch errors in histogram analysis');
1206 }
1207
1208 $bit_total = 0;
1209 $frame_counter = 0;
1210 foreach ($info['mpeg']['audio']['bitrate_distribution'] as $bit_rate_value => $bit_rate_count) {
1211 $frame_counter += $bit_rate_count;
1212 if ($bit_rate_value != 'free') {
1213 $bit_total += ($bit_rate_value * $bit_rate_count);
1214 }
1215 }
1216 if ($frame_counter == 0) {
1217 throw new getid3_exception('Corrupt MP3 file: framecounter == zero');
1218 }
1219 $info['mpeg']['audio']['frame_count'] = $frame_counter;
1220 $info['mpeg']['audio']['bitrate'] = ($bit_total / $frame_counter);
1221
1222 $info['audio']['bitrate'] = $info['mpeg']['audio']['bitrate'];
1223
1224
1225 // Definitively set VBR vs CBR, even if the Xing/LAME/VBRI header says differently
1226 $distinct_bit_rates = 0;
1227 foreach ($info['mpeg']['audio']['bitrate_distribution'] as $bit_rate_value => $bit_rate_count) {
1228 if ($bit_rate_count > 0) {
1229 $distinct_bit_rates++;
1230 }
1231 }
1232 if ($distinct_bit_rates > 1) {
1233 $info['mpeg']['audio']['bitrate_mode'] = 'vbr';
1234 } else {
1235 $info['mpeg']['audio']['bitrate_mode'] = 'cbr';
1236 }
1237 $info['audio']['bitrate_mode'] = $info['mpeg']['audio']['bitrate_mode'];
1238
1239 }
1240
1241 break; // exit while()
1242 }
1243 }
1244
1245 $synch_seek_offset++;
1246 if (($avdata_offset + $synch_seek_offset) >= $info['avdataend']) {
1247 // end of file/data
1248
1249 if (empty($info['mpeg']['audio'])) {
1250
1251 throw new getid3_exception('could not find valid MPEG synch before end of file');
1252 }
1253 break;
1254 }
1255
1256 }
1257
1258 $info['audio']['channels'] = $info['mpeg']['audio']['channels'];
1259 $info['audio']['channelmode'] = $info['mpeg']['audio']['channelmode'];
1260 $info['audio']['sample_rate'] = $info['mpeg']['audio']['sample_rate'];
1261 return true;
1262 }
1263
1264
1265
1266 public static function MPEGaudioVersionarray() {
1267
1268 static $array = array ('2.5', false, '2', '1');
1269 return $array;
1270 }
1271
1272
1273
1274 public static function MPEGaudioLayerarray() {
1275
1276 static $array = array (false, 3, 2, 1);
1277 return $array;
1278 }
1279
1280
1281
1282 public static function MPEGaudioBitratearray() {
1283
1284 static $array;
1285 if (empty($array)) {
1286 $array = array (
1287 '1' => array (1 => array ('free', 32000, 64000, 96000, 128000, 160000, 192000, 224000, 256000, 288000, 320000, 352000, 384000, 416000, 448000),
1288 2 => array ('free', 32000, 48000, 56000, 64000, 80000, 96000, 112000, 128000, 160000, 192000, 224000, 256000, 320000, 384000),
1289 3 => array ('free', 32000, 40000, 48000, 56000, 64000, 80000, 96000, 112000, 128000, 160000, 192000, 224000, 256000, 320000)
1290 ),
1291
1292 '2' => array (1 => array ('free', 32000, 48000, 56000, 64000, 80000, 96000, 112000, 128000, 144000, 160000, 176000, 192000, 224000, 256000),
1293 2 => array ('free', 8000, 16000, 24000, 32000, 40000, 48000, 56000, 64000, 80000, 96000, 112000, 128000, 144000, 160000),
1294 )
1295 );
1296 $array['2'][3] = $array['2'][2];
1297 $array['2.5'] = $array['2'];
1298 }
1299 return $array;
1300 }
1301
1302
1303
1304 public static function MPEGaudioFrequencyarray() {
1305
1306 static $array = array (
1307 '1' => array (44100, 48000, 32000),
1308 '2' => array (22050, 24000, 16000),
1309 '2.5' => array (11025, 12000, 8000)
1310 );
1311 return $array;
1312 }
1313
1314
1315
1316 public static function MPEGaudioChannelModearray() {
1317
1318 static $array = array ('stereo', 'joint stereo', 'dual channel', 'mono');
1319 return $array;
1320 }
1321
1322
1323
1324 public static function MPEGaudioModeExtensionarray() {
1325
1326 static $array = array (
1327 1 => array ('4-31', '8-31', '12-31', '16-31'),
1328 2 => array ('4-31', '8-31', '12-31', '16-31'),
1329 3 => array ('', 'IS', 'MS', 'IS+MS')
1330 );
1331 return $array;
1332 }
1333
1334
1335
1336 public static function MPEGaudioEmphasisarray() {
1337
1338 static $array = array ('none', '50/15ms', false, 'CCIT J.17');
1339 return $array;
1340 }
1341
1342
1343
1344 public static function MPEGaudioHeaderBytesValid($head4, $allow_bitrate_15=false) {
1345
1346 return getid3_mp3::MPEGaudioHeaderValid(getid3_mp3::MPEGaudioHeaderDecode($head4), false, $allow_bitrate_15);
1347 }
1348
1349
1350
1351 public static function MPEGaudioHeaderValid($raw_array, $echo_errors=false, $allow_bitrate_15=false) {
1352
1353 if (($raw_array['synch'] & 0x0FFE) != 0x0FFE) {
1354 return false;
1355 }
1356
1357 static $mpeg_audio_version_lookup;
1358 static $mpeg_audio_layer_lookup;
1359 static $mpeg_audio_bitrate_lookup;
1360 static $mpeg_audio_frequency_lookup;
1361 static $mpeg_audio_channel_mode_lookup;
1362 static $mpeg_audio_mode_extension_lookup;
1363 static $mpeg_audio_emphasis_lookup;
1364 if (empty($mpeg_audio_version_lookup)) {
1365 $mpeg_audio_version_lookup = getid3_mp3::MPEGaudioVersionarray();
1366 $mpeg_audio_layer_lookup = getid3_mp3::MPEGaudioLayerarray();
1367 $mpeg_audio_bitrate_lookup = getid3_mp3::MPEGaudioBitratearray();
1368 $mpeg_audio_frequency_lookup = getid3_mp3::MPEGaudioFrequencyarray();
1369 $mpeg_audio_channel_mode_lookup = getid3_mp3::MPEGaudioChannelModearray();
1370 $mpeg_audio_mode_extension_lookup = getid3_mp3::MPEGaudioModeExtensionarray();
1371 $mpeg_audio_emphasis_lookup = getid3_mp3::MPEGaudioEmphasisarray();
1372 }
1373
1374 if (isset($mpeg_audio_version_lookup[$raw_array['version']])) {
1375 $decodedVersion = $mpeg_audio_version_lookup[$raw_array['version']];
1376 } else {
1377 echo ($echo_errors ? "\n".'invalid Version ('.$raw_array['version'].')' : '');
1378 return false;
1379 }
1380 if (isset($mpeg_audio_layer_lookup[$raw_array['layer']])) {
1381 $decodedLayer = $mpeg_audio_layer_lookup[$raw_array['layer']];
1382 } else {
1383 echo ($echo_errors ? "\n".'invalid Layer ('.$raw_array['layer'].')' : '');
1384 return false;
1385 }
1386 if (!isset($mpeg_audio_bitrate_lookup[$decodedVersion][$decodedLayer][$raw_array['bitrate']])) {
1387 echo ($echo_errors ? "\n".'invalid Bitrate ('.$raw_array['bitrate'].')' : '');
1388 if ($raw_array['bitrate'] == 15) {
1389 // known issue in LAME 3.90 - 3.93.1 where free-format has bitrate ID of 15 instead of 0
1390 // let it go through here otherwise file will not be identified
1391 if (!$allow_bitrate_15) {
1392 return false;
1393 }
1394 } else {
1395 return false;
1396 }
1397 }
1398 if (!isset($mpeg_audio_frequency_lookup[$decodedVersion][$raw_array['sample_rate']])) {
1399 echo ($echo_errors ? "\n".'invalid Frequency ('.$raw_array['sample_rate'].')' : '');
1400 return false;
1401 }
1402 if (!isset($mpeg_audio_channel_mode_lookup[$raw_array['channelmode']])) {
1403 echo ($echo_errors ? "\n".'invalid ChannelMode ('.$raw_array['channelmode'].')' : '');
1404 return false;
1405 }
1406 if (!isset($mpeg_audio_mode_extension_lookup[$decodedLayer][$raw_array['modeextension']])) {
1407 echo ($echo_errors ? "\n".'invalid Mode Extension ('.$raw_array['modeextension'].')' : '');
1408 return false;
1409 }
1410 if (!isset($mpeg_audio_emphasis_lookup[$raw_array['emphasis']])) {
1411 echo ($echo_errors ? "\n".'invalid Emphasis ('.$raw_array['emphasis'].')' : '');
1412 return false;
1413 }
1414 // These are just either set or not set, you can't mess that up :)
1415 // $raw_array['protection'];
1416 // $raw_array['padding'];
1417 // $raw_array['private'];
1418 // $raw_array['copyright'];
1419 // $raw_array['original'];
1420
1421 return true;
1422 }
1423
1424
1425
1426 public static function MPEGaudioHeaderDecode($header_four_bytes) {
1427 // AAAA AAAA AAAB BCCD EEEE FFGH IIJJ KLMM
1428 // A - Frame sync (all bits set)
1429 // B - MPEG Audio version ID
1430 // C - Layer description
1431 // D - Protection bit
1432 // E - Bitrate index
1433 // F - Sampling rate frequency index
1434 // G - Padding bit
1435 // H - Private bit
1436 // I - Channel Mode
1437 // J - Mode extension (Only if Joint stereo)
1438 // K - Copyright
1439 // L - Original
1440 // M - Emphasis
1441
1442 if (strlen($header_four_bytes) != 4) {
1443 return false;
1444 }
1445
1446 $mpeg_raw_header['synch'] = (getid3_lib::BigEndian2Int(substr($header_four_bytes, 0, 2)) & 0xFFE0) >> 4;
1447 $mpeg_raw_header['version'] = (ord($header_four_bytes{1}) & 0x18) >> 3; // BB
1448 $mpeg_raw_header['layer'] = (ord($header_four_bytes{1}) & 0x06) >> 1; // CC
1449 $mpeg_raw_header['protection'] = (ord($header_four_bytes{1}) & 0x01); // D
1450 $mpeg_raw_header['bitrate'] = (ord($header_four_bytes{2}) & 0xF0) >> 4; // EEEE
1451 $mpeg_raw_header['sample_rate'] = (ord($header_four_bytes{2}) & 0x0C) >> 2; // FF
1452 $mpeg_raw_header['padding'] = (ord($header_four_bytes{2}) & 0x02) >> 1; // G
1453 $mpeg_raw_header['private'] = (ord($header_four_bytes{2}) & 0x01); // H
1454 $mpeg_raw_header['channelmode'] = (ord($header_four_bytes{3}) & 0xC0) >> 6; // II
1455 $mpeg_raw_header['modeextension'] = (ord($header_four_bytes{3}) & 0x30) >> 4; // JJ
1456 $mpeg_raw_header['copyright'] = (ord($header_four_bytes{3}) & 0x08) >> 3; // K
1457 $mpeg_raw_header['original'] = (ord($header_four_bytes{3}) & 0x04) >> 2; // L
1458 $mpeg_raw_header['emphasis'] = (ord($header_four_bytes{3}) & 0x03); // MM
1459
1460 return $mpeg_raw_header;
1461 }
1462
1463
1464
1465 public static function MPEGaudioFrameLength(&$bit_rate, &$version, &$layer, $padding, &$sample_rate) {
1466
1467 if (!isset($cache[$bit_rate][$version][$layer][$padding][$sample_rate])) {
1468 $cache[$bit_rate][$version][$layer][$padding][$sample_rate] = false;
1469 if ($bit_rate != 'free') {
1470
1471 if ($version == '1') {
1472
1473 if ($layer == '1') {
1474
1475 // For Layer I slot is 32 bits long
1476 $frame_length_coefficient = 48;
1477 $slot_length = 4;
1478
1479 } else { // Layer 2 / 3
1480
1481 // for Layer 2 and Layer 3 slot is 8 bits long.
1482 $frame_length_coefficient = 144;
1483 $slot_length = 1;
1484
1485 }
1486
1487 } else { // MPEG-2 / MPEG-2.5
1488
1489 if ($layer == '1') {
1490
1491 // For Layer I slot is 32 bits long
1492 $frame_length_coefficient = 24;
1493 $slot_length = 4;
1494
1495 } elseif ($layer == '2') {
1496
1497 // for Layer 2 and Layer 3 slot is 8 bits long.
1498 $frame_length_coefficient = 144;
1499 $slot_length = 1;
1500
1501 } else { // layer 3
1502
1503 // for Layer 2 and Layer 3 slot is 8 bits long.
1504 $frame_length_coefficient = 72;
1505 $slot_length = 1;
1506
1507 }
1508
1509 }
1510
1511 // FrameLengthInBytes = ((Coefficient * BitRate) / SampleRate) + Padding
1512 if ($sample_rate > 0) {
1513 $new_frame_length = ($frame_length_coefficient * $bit_rate) / $sample_rate;
1514 $new_frame_length = floor($new_frame_length / $slot_length) * $slot_length; // round to next-lower multiple of SlotLength (1 byte for Layer 2/3, 4 bytes for Layer I)
1515 if ($padding) {
1516 $new_frame_length += $slot_length;
1517 }
1518 $cache[$bit_rate][$version][$layer][$padding][$sample_rate] = (int) $new_frame_length;
1519 }
1520 }
1521 }
1522 return $cache[$bit_rate][$version][$layer][$padding][$sample_rate];
1523 }
1524
1525
1526
1527 public static function ClosestStandardMP3Bitrate($bit_rate) {
1528
1529 static $standard_bit_rates = array (320000, 256000, 224000, 192000, 160000, 128000, 112000, 96000, 80000, 64000, 56000, 48000, 40000, 32000, 24000, 16000, 8000);
1530 static $bit_rate_table = array (0=>'-');
1531 $round_bit_rate = intval(round($bit_rate, -3));
1532 if (!isset($bit_rate_table[$round_bit_rate])) {
1533 if ($round_bit_rate > 320000) {
1534 $bit_rate_table[$round_bit_rate] = round($bit_rate, -4);
1535 } else {
1536 $last_bit_rate = 320000;
1537 foreach ($standard_bit_rates as $standard_bit_rate) {
1538 $bit_rate_table[$round_bit_rate] = $standard_bit_rate;
1539 if ($round_bit_rate >= $standard_bit_rate - (($last_bit_rate - $standard_bit_rate) / 2)) {
1540 break;
1541 }
1542 $last_bit_rate = $standard_bit_rate;
1543 }
1544 }
1545 }
1546 return $bit_rate_table[$round_bit_rate];
1547 }
1548
1549
1550
1551 public static function XingVBRidOffset($version, $channel_mode) {
1552
1553 static $lookup = array (
1554 '1' => array ('mono' => 0x15, // 4 + 17 = 21
1555 'stereo' => 0x24, // 4 + 32 = 36
1556 'joint stereo' => 0x24,
1557 'dual channel' => 0x24
1558 ),
1559
1560 '2' => array ('mono' => 0x0D, // 4 + 9 = 13
1561 'stereo' => 0x15, // 4 + 17 = 21
1562 'joint stereo' => 0x15,
1563 'dual channel' => 0x15
1564 ),
1565
1566 '2.5' => array ('mono' => 0x15,
1567 'stereo' => 0x15,
1568 'joint stereo' => 0x15,
1569 'dual channel' => 0x15
1570 )
1571 );
1572
1573 return $lookup[$version][$channel_mode];
1574 }
1575
1576
1577
1578 public static function LAMEvbrMethodLookup($vbr_method_id) {
1579
1580 static $lookup = array (
1581 0x00 => 'unknown',
1582 0x01 => 'cbr',
1583 0x02 => 'abr',
1584 0x03 => 'vbr-old / vbr-rh',
1585 0x04 => 'vbr-new / vbr-mtrh',
1586 0x05 => 'vbr-mt',
1587 0x06 => 'Full VBR Method 4',
1588 0x08 => 'constant bitrate 2 pass',
1589 0x09 => 'abr 2 pass',
1590 0x0F => 'reserved'
1591 );
1592 return (isset($lookup[$vbr_method_id]) ? $lookup[$vbr_method_id] : '');
1593 }
1594
1595
1596
1597 public static function LAMEmiscStereoModeLookup($stereo_mode_id) {
1598
1599 static $lookup = array (
1600 0 => 'mono',
1601 1 => 'stereo',
1602 2 => 'dual mono',
1603 3 => 'joint stereo',
1604 4 => 'forced stereo',
1605 5 => 'auto',
1606 6 => 'intensity stereo',
1607 7 => 'other'
1608 );
1609 return (isset($lookup[$stereo_mode_id]) ? $lookup[$stereo_mode_id] : '');
1610 }
1611
1612
1613
1614 public static function LAMEmiscSourceSampleFrequencyLookup($source_sample_frequency_id) {
1615
1616 static $lookup = array (
1617 0 => '<= 32 kHz',
1618 1 => '44.1 kHz',
1619 2 => '48 kHz',
1620 3 => '> 48kHz'
1621 );
1622 return (isset($lookup[$source_sample_frequency_id]) ? $lookup[$source_sample_frequency_id] : '');
1623 }
1624
1625
1626
1627 public static function LAMEsurroundInfoLookup($surround_info_id) {
1628
1629 static $lookup = array (
1630 0 => 'no surround info',
1631 1 => 'DPL encoding',
1632 2 => 'DPL2 encoding',
1633 3 => 'Ambisonic encoding'
1634 );
1635 return (isset($lookup[$surround_info_id]) ? $lookup[$surround_info_id] : 'reserved');
1636 }
1637
1638
1639
1640 public static function LAMEpresetUsedLookup($lame_tag) {
1641
1642 if ($lame_tag['preset_used_id'] == 0) {
1643 // no preset used (LAME >=3.93)
1644 // no preset recorded (LAME <3.93)
1645 return '';
1646 }
1647
1648 $lame_preset_used_lookup = array ();
1649
1650 for ($i = 8; $i <= 320; $i++) {
1651 switch ($lame_tag['vbr_method']) {
1652 case 'cbr':
1653 $lame_preset_used_lookup[$i] = '--alt-preset '.$lame_tag['vbr_method'].' '.$i;
1654 break;
1655 case 'abr':
1656 default: // other VBR modes shouldn't be here(?)
1657 $lame_preset_used_lookup[$i] = '--alt-preset '.$i;
1658 break;
1659 }
1660 }
1661
1662 // named old-style presets (studio, phone, voice, etc) are handled in GuessEncoderOptions()
1663
1664 // named alt-presets
1665 $lame_preset_used_lookup[1000] = '--r3mix';
1666 $lame_preset_used_lookup[1001] = '--alt-preset standard';
1667 $lame_preset_used_lookup[1002] = '--alt-preset extreme';
1668 $lame_preset_used_lookup[1003] = '--alt-preset insane';
1669 $lame_preset_used_lookup[1004] = '--alt-preset fast standard';
1670 $lame_preset_used_lookup[1005] = '--alt-preset fast extreme';
1671 $lame_preset_used_lookup[1006] = '--alt-preset medium';
1672 $lame_preset_used_lookup[1007] = '--alt-preset fast medium';
1673
1674 // LAME 3.94 additions/changes
1675 $lame_preset_used_lookup[1010] = '--preset portable'; // 3.94a15 Oct 21 2003
1676 $lame_preset_used_lookup[1015] = '--preset radio'; // 3.94a15 Oct 21 2003
1677
1678 $lame_preset_used_lookup[320] = '--preset insane'; // 3.94a15 Nov 12 2003
1679 $lame_preset_used_lookup[410] = '-V9';
1680 $lame_preset_used_lookup[420] = '-V8';
1681 $lame_preset_used_lookup[430] = '--preset radio'; // 3.94a15 Nov 12 2003
1682 $lame_preset_used_lookup[440] = '-V6';
1683 $lame_preset_used_lookup[450] = '--preset '.(($lame_tag['raw']['vbr_method'] == 4) ? 'fast ' : '').'portable'; // 3.94a15 Nov 12 2003
1684 $lame_preset_used_lookup[460] = '--preset '.(($lame_tag['raw']['vbr_method'] == 4) ? 'fast ' : '').'medium'; // 3.94a15 Nov 12 2003
1685 $lame_preset_used_lookup[470] = '--r3mix'; // 3.94b1 Dec 18 2003
1686 $lame_preset_used_lookup[480] = '--preset '.(($lame_tag['raw']['vbr_method'] == 4) ? 'fast ' : '').'standard'; // 3.94a15 Nov 12 2003
1687 $lame_preset_used_lookup[490] = '-V1';
1688 $lame_preset_used_lookup[500] = '--preset '.(($lame_tag['raw']['vbr_method'] == 4) ? 'fast ' : '').'extreme'; // 3.94a15 Nov 12 2003
1689
1690 return (isset($lame_preset_used_lookup[$lame_tag['preset_used_id']]) ? $lame_preset_used_lookup[$lame_tag['preset_used_id']] : 'new/unknown preset: '.$lame_tag['preset_used_id'].' - report to info@getid3.org');
1691 }
1692
1693
1694 }
1695
1696 ?>