ILIAS  release_5-1 Revision 5.0.0-5477-g43f3e3fab5f
module.audio.ogg.php
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1<?php
4// available at http://getid3.sourceforge.net //
5// or http://www.getid3.org //
7// See readme.txt for more details //
9// //
10// module.audio.ogg.php //
11// module for analyzing Ogg Vorbis, OggFLAC and Speex files //
12// dependencies: module.audio.flac.php //
13// ///
15
16getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio.flac.php', __FILE__, true);
17
18class getid3_ogg
19{
20
21 function getid3_ogg(&$fd, &$ThisFileInfo) {
22
23 $ThisFileInfo['fileformat'] = 'ogg';
24
25 // Warn about illegal tags - only vorbiscomments are allowed
26 if (isset($ThisFileInfo['id3v2'])) {
27 $ThisFileInfo['warning'][] = 'Illegal ID3v2 tag present.';
28 }
29 if (isset($ThisFileInfo['id3v1'])) {
30 $ThisFileInfo['warning'][] = 'Illegal ID3v1 tag present.';
31 }
32 if (isset($ThisFileInfo['ape'])) {
33 $ThisFileInfo['warning'][] = 'Illegal APE tag present.';
34 }
35
36
37 // Page 1 - Stream Header
38
39 fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET);
40
41 $oggpageinfo = getid3_ogg::ParseOggPageHeader($fd);
42 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo;
43
44 if (ftell($fd) >= GETID3_FREAD_BUFFER_SIZE) {
45 $ThisFileInfo['error'][] = 'Could not find start of Ogg page in the first '.GETID3_FREAD_BUFFER_SIZE.' bytes (this might not be an Ogg-Vorbis file?)';
46 unset($ThisFileInfo['fileformat']);
47 unset($ThisFileInfo['ogg']);
48 return false;
49 }
50
51 $filedata = fread($fd, $oggpageinfo['page_length']);
52 $filedataoffset = 0;
53
54 if (substr($filedata, 0, 4) == 'fLaC') {
55
56 $ThisFileInfo['audio']['dataformat'] = 'flac';
57 $ThisFileInfo['audio']['bitrate_mode'] = 'vbr';
58 $ThisFileInfo['audio']['lossless'] = true;
59
60 } elseif (substr($filedata, 1, 6) == 'vorbis') {
61
62 $ThisFileInfo['audio']['dataformat'] = 'vorbis';
63 $ThisFileInfo['audio']['lossless'] = false;
64
65 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['packet_type'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));
66 $filedataoffset += 1;
67 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['stream_type'] = substr($filedata, $filedataoffset, 6); // hard-coded to 'vorbis'
68 $filedataoffset += 6;
69 $ThisFileInfo['ogg']['bitstreamversion'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
70 $filedataoffset += 4;
71 $ThisFileInfo['ogg']['numberofchannels'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));
72 $filedataoffset += 1;
73 $ThisFileInfo['audio']['channels'] = $ThisFileInfo['ogg']['numberofchannels'];
74 $ThisFileInfo['ogg']['samplerate'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
75 $filedataoffset += 4;
76 if ($ThisFileInfo['ogg']['samplerate'] == 0) {
77 $ThisFileInfo['error'][] = 'Corrupt Ogg file: sample rate == zero';
78 return false;
79 }
80 $ThisFileInfo['audio']['sample_rate'] = $ThisFileInfo['ogg']['samplerate'];
81 $ThisFileInfo['ogg']['samples'] = 0; // filled in later
82 $ThisFileInfo['ogg']['bitrate_average'] = 0; // filled in later
83 $ThisFileInfo['ogg']['bitrate_max'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
84 $filedataoffset += 4;
85 $ThisFileInfo['ogg']['bitrate_nominal'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
86 $filedataoffset += 4;
87 $ThisFileInfo['ogg']['bitrate_min'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
88 $filedataoffset += 4;
89 $ThisFileInfo['ogg']['blocksize_small'] = pow(2, getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)) & 0x0F);
90 $ThisFileInfo['ogg']['blocksize_large'] = pow(2, (getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)) & 0xF0) >> 4);
91 $ThisFileInfo['ogg']['stop_bit'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); // must be 1, marks end of packet
92
93 $ThisFileInfo['audio']['bitrate_mode'] = 'vbr'; // overridden if actually abr
94 if ($ThisFileInfo['ogg']['bitrate_max'] == 0xFFFFFFFF) {
95 unset($ThisFileInfo['ogg']['bitrate_max']);
96 $ThisFileInfo['audio']['bitrate_mode'] = 'abr';
97 }
98 if ($ThisFileInfo['ogg']['bitrate_nominal'] == 0xFFFFFFFF) {
99 unset($ThisFileInfo['ogg']['bitrate_nominal']);
100 }
101 if ($ThisFileInfo['ogg']['bitrate_min'] == 0xFFFFFFFF) {
102 unset($ThisFileInfo['ogg']['bitrate_min']);
103 $ThisFileInfo['audio']['bitrate_mode'] = 'abr';
104 }
105
106 } elseif (substr($filedata, 0, 8) == 'Speex ') {
107
108 // http://www.speex.org/manual/node10.html
109
110 $ThisFileInfo['audio']['dataformat'] = 'speex';
111 $ThisFileInfo['mime_type'] = 'audio/speex';
112 $ThisFileInfo['audio']['bitrate_mode'] = 'abr';
113 $ThisFileInfo['audio']['lossless'] = false;
114
115 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_string'] = substr($filedata, $filedataoffset, 8); // hard-coded to 'Speex '
116 $filedataoffset += 8;
117 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version'] = substr($filedata, $filedataoffset, 20);
118 $filedataoffset += 20;
119 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version_id'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
120 $filedataoffset += 4;
121 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['header_size'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
122 $filedataoffset += 4;
123 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['rate'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
124 $filedataoffset += 4;
125 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
126 $filedataoffset += 4;
127 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode_bitstream_version'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
128 $filedataoffset += 4;
129 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['nb_channels'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
130 $filedataoffset += 4;
131 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['bitrate'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
132 $filedataoffset += 4;
133 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['framesize'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
134 $filedataoffset += 4;
135 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['vbr'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
136 $filedataoffset += 4;
137 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['frames_per_packet'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
138 $filedataoffset += 4;
139 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['extra_headers'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
140 $filedataoffset += 4;
141 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['reserved1'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
142 $filedataoffset += 4;
143 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['reserved2'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
144 $filedataoffset += 4;
145
146 $ThisFileInfo['speex']['speex_version'] = trim($ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version']);
147 $ThisFileInfo['speex']['sample_rate'] = $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['rate'];
148 $ThisFileInfo['speex']['channels'] = $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['nb_channels'];
149 $ThisFileInfo['speex']['vbr'] = (bool) $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['vbr'];
150 $ThisFileInfo['speex']['band_type'] = getid3_ogg::SpeexBandModeLookup($ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode']);
151
152 $ThisFileInfo['audio']['sample_rate'] = $ThisFileInfo['speex']['sample_rate'];
153 $ThisFileInfo['audio']['channels'] = $ThisFileInfo['speex']['channels'];
154 if ($ThisFileInfo['speex']['vbr']) {
155 $ThisFileInfo['audio']['bitrate_mode'] = 'vbr';
156 }
157
158 } else {
159
160 $ThisFileInfo['error'][] = 'Expecting either "Speex " or "vorbis" identifier strings, found neither';
161 unset($ThisFileInfo['ogg']);
162 unset($ThisFileInfo['mime_type']);
163 return false;
164
165 }
166
167
168 // Page 2 - Comment Header
169
170 $oggpageinfo = getid3_ogg::ParseOggPageHeader($fd);
171 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo;
172
173 switch ($ThisFileInfo['audio']['dataformat']) {
174
175 case 'vorbis':
176 $filedata = fread($fd, $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']);
177 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['packet_type'] = getid3_lib::LittleEndian2Int(substr($filedata, 0, 1));
178 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['stream_type'] = substr($filedata, 1, 6); // hard-coded to 'vorbis'
179
180 getid3_ogg::ParseVorbisCommentsFilepointer($fd, $ThisFileInfo);
181 break;
182
183 case 'flac':
184 if (!getid3_flac::FLACparseMETAdata($fd, $ThisFileInfo)) {
185 $ThisFileInfo['error'][] = 'Failed to parse FLAC headers';
186 return false;
187 }
188 break;
189
190 case 'speex':
191 fseek($fd, $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length'], SEEK_CUR);
192 getid3_ogg::ParseVorbisCommentsFilepointer($fd, $ThisFileInfo);
193 break;
194
195 }
196
197
198
199 // Last Page - Number of Samples
200
201 fseek($fd, max($ThisFileInfo['avdataend'] - GETID3_FREAD_BUFFER_SIZE, 0), SEEK_SET);
202 $LastChunkOfOgg = strrev(fread($fd, GETID3_FREAD_BUFFER_SIZE));
203 if ($LastOggSpostion = strpos($LastChunkOfOgg, 'SggO')) {
204 fseek($fd, $ThisFileInfo['avdataend'] - ($LastOggSpostion + strlen('SggO')), SEEK_SET);
205 $ThisFileInfo['avdataend'] = ftell($fd);
206 $ThisFileInfo['ogg']['pageheader']['eos'] = getid3_ogg::ParseOggPageHeader($fd);
207 $ThisFileInfo['ogg']['samples'] = $ThisFileInfo['ogg']['pageheader']['eos']['pcm_abs_position'];
208 if ($ThisFileInfo['ogg']['samples'] == 0) {
209 $ThisFileInfo['error'][] = 'Corrupt Ogg file: eos.number of samples == zero';
210 return false;
211 }
212 $ThisFileInfo['ogg']['bitrate_average'] = (($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) * 8) / ($ThisFileInfo['ogg']['samples'] / $ThisFileInfo['audio']['sample_rate']);
213 }
214
215 if (!empty($ThisFileInfo['ogg']['bitrate_average'])) {
216 $ThisFileInfo['audio']['bitrate'] = $ThisFileInfo['ogg']['bitrate_average'];
217 } elseif (!empty($ThisFileInfo['ogg']['bitrate_nominal'])) {
218 $ThisFileInfo['audio']['bitrate'] = $ThisFileInfo['ogg']['bitrate_nominal'];
219 } elseif (!empty($ThisFileInfo['ogg']['bitrate_min']) && !empty($ThisFileInfo['ogg']['bitrate_max'])) {
220 $ThisFileInfo['audio']['bitrate'] = ($ThisFileInfo['ogg']['bitrate_min'] + $ThisFileInfo['ogg']['bitrate_max']) / 2;
221 }
222 if (isset($ThisFileInfo['audio']['bitrate']) && !isset($ThisFileInfo['playtime_seconds'])) {
223 if ($ThisFileInfo['audio']['bitrate'] == 0) {
224 $ThisFileInfo['error'][] = 'Corrupt Ogg file: bitrate_audio == zero';
225 return false;
226 }
227 $ThisFileInfo['playtime_seconds'] = (float) ((($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) * 8) / $ThisFileInfo['audio']['bitrate']);
228 }
229
230 if (isset($ThisFileInfo['ogg']['vendor'])) {
231 $ThisFileInfo['audio']['encoder'] = preg_replace('/^Encoded with /', '', $ThisFileInfo['ogg']['vendor']);
232
233 // Vorbis only
234 if ($ThisFileInfo['audio']['dataformat'] == 'vorbis') {
235
236 // Vorbis 1.0 starts with Xiph.Org
237 if (preg_match('/^Xiph.Org/', $ThisFileInfo['audio']['encoder'])) {
238
239 if ($ThisFileInfo['audio']['bitrate_mode'] == 'abr') {
240
241 // Set -b 128 on abr files
242 $ThisFileInfo['audio']['encoder_options'] = '-b '.round($ThisFileInfo['ogg']['bitrate_nominal'] / 1000);
243
244 } elseif (($ThisFileInfo['audio']['bitrate_mode'] == 'vbr') && ($ThisFileInfo['audio']['channels'] == 2) && ($ThisFileInfo['audio']['sample_rate'] >= 44100) && ($ThisFileInfo['audio']['sample_rate'] <= 48000)) {
245 // Set -q N on vbr files
246 $ThisFileInfo['audio']['encoder_options'] = '-q '.$this->get_quality_from_nominal_bitrate($ThisFileInfo['ogg']['bitrate_nominal']);
247
248 }
249 }
250
251 if (empty($ThisFileInfo['audio']['encoder_options']) && !empty($ThisFileInfo['ogg']['bitrate_nominal'])) {
252 $ThisFileInfo['audio']['encoder_options'] = 'Nominal bitrate: '.intval(round($ThisFileInfo['ogg']['bitrate_nominal'] / 1000)).'kbps';
253 }
254 }
255 }
256
257 return true;
258 }
259
260
261 function ParseOggPageHeader(&$fd) {
262 // http://xiph.org/ogg/vorbis/doc/framing.html
263 $oggheader['page_start_offset'] = ftell($fd); // where we started from in the file
264
265 $filedata = fread($fd, GETID3_FREAD_BUFFER_SIZE);
266 $filedataoffset = 0;
267 while ((substr($filedata, $filedataoffset++, 4) != 'OggS')) {
268 if ((ftell($fd) - $oggheader['page_start_offset']) >= GETID3_FREAD_BUFFER_SIZE) {
269 // should be found before here
270 return false;
271 }
272 if ((($filedataoffset + 28) > strlen($filedata)) || (strlen($filedata) < 28)) {
273 if (feof($fd) || (($filedata .= fread($fd, GETID3_FREAD_BUFFER_SIZE)) === false)) {
274 // get some more data, unless eof, in which case fail
275 return false;
276 }
277 }
278 }
279 $filedataoffset += strlen('OggS') - 1; // page, delimited by 'OggS'
280
281 $oggheader['stream_structver'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));
282 $filedataoffset += 1;
283 $oggheader['flags_raw'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));
284 $filedataoffset += 1;
285 $oggheader['flags']['fresh'] = (bool) ($oggheader['flags_raw'] & 0x01); // fresh packet
286 $oggheader['flags']['bos'] = (bool) ($oggheader['flags_raw'] & 0x02); // first page of logical bitstream (bos)
287 $oggheader['flags']['eos'] = (bool) ($oggheader['flags_raw'] & 0x04); // last page of logical bitstream (eos)
288
289 $oggheader['pcm_abs_position'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8));
290 $filedataoffset += 8;
291 $oggheader['stream_serialno'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
292 $filedataoffset += 4;
293 $oggheader['page_seqno'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
294 $filedataoffset += 4;
295 $oggheader['page_checksum'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
296 $filedataoffset += 4;
297 $oggheader['page_segments'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));
298 $filedataoffset += 1;
299 $oggheader['page_length'] = 0;
300 for ($i = 0; $i < $oggheader['page_segments']; $i++) {
301 $oggheader['segment_table'][$i] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));
302 $filedataoffset += 1;
303 $oggheader['page_length'] += $oggheader['segment_table'][$i];
304 }
305 $oggheader['header_end_offset'] = $oggheader['page_start_offset'] + $filedataoffset;
306 $oggheader['page_end_offset'] = $oggheader['header_end_offset'] + $oggheader['page_length'];
307 fseek($fd, $oggheader['header_end_offset'], SEEK_SET);
308
309 return $oggheader;
310 }
311
312
313 function ParseVorbisCommentsFilepointer(&$fd, &$ThisFileInfo) {
314
315 $OriginalOffset = ftell($fd);
316 $CommentStartOffset = $OriginalOffset;
317 $commentdataoffset = 0;
318 $VorbisCommentPage = 1;
319
320 switch ($ThisFileInfo['audio']['dataformat']) {
321 case 'vorbis':
322 $CommentStartOffset = $ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage]['page_start_offset']; // Second Ogg page, after header block
323 fseek($fd, $CommentStartOffset, SEEK_SET);
324 $commentdataoffset = 27 + $ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage]['page_segments'];
325 $commentdata = fread($fd, getid3_ogg::OggPageSegmentLength($ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage], 1) + $commentdataoffset);
326
327 $commentdataoffset += (strlen('vorbis') + 1);
328 break;
329
330 case 'flac':
331 fseek($fd, $ThisFileInfo['flac']['VORBIS_COMMENT']['raw']['offset'] + 4, SEEK_SET);
332 $commentdata = fread($fd, $ThisFileInfo['flac']['VORBIS_COMMENT']['raw']['block_length']);
333 break;
334
335 case 'speex':
336 $CommentStartOffset = $ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage]['page_start_offset']; // Second Ogg page, after header block
337 fseek($fd, $CommentStartOffset, SEEK_SET);
338 $commentdataoffset = 27 + $ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage]['page_segments'];
339 $commentdata = fread($fd, getid3_ogg::OggPageSegmentLength($ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage], 1) + $commentdataoffset);
340 break;
341
342 default:
343 return false;
344 break;
345 }
346
347 $VendorSize = getid3_lib::LittleEndian2Int(substr($commentdata, $commentdataoffset, 4));
348 $commentdataoffset += 4;
349
350 $ThisFileInfo['ogg']['vendor'] = substr($commentdata, $commentdataoffset, $VendorSize);
351 $commentdataoffset += $VendorSize;
352
353 $CommentsCount = getid3_lib::LittleEndian2Int(substr($commentdata, $commentdataoffset, 4));
354 $commentdataoffset += 4;
355 $ThisFileInfo['avdataoffset'] = $CommentStartOffset + $commentdataoffset;
356
357 $basicfields = array('TITLE', 'ARTIST', 'ALBUM', 'TRACKNUMBER', 'GENRE', 'DATE', 'DESCRIPTION', 'COMMENT');
358 for ($i = 0; $i < $CommentsCount; $i++) {
359
360 $ThisFileInfo['ogg']['comments_raw'][$i]['dataoffset'] = $CommentStartOffset + $commentdataoffset;
361
362 if (ftell($fd) < ($ThisFileInfo['ogg']['comments_raw'][$i]['dataoffset'] + 4)) {
363 $VorbisCommentPage++;
364
365 $oggpageinfo = getid3_ogg::ParseOggPageHeader($fd);
366 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo;
367
368 // First, save what we haven't read yet
369 $AsYetUnusedData = substr($commentdata, $commentdataoffset);
370
371 // Then take that data off the end
372 $commentdata = substr($commentdata, 0, $commentdataoffset);
373
374 // Add [headerlength] bytes of dummy data for the Ogg Page Header, just to keep absolute offsets correct
375 $commentdata .= str_repeat("\x00", 27 + $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']);
376 $commentdataoffset += (27 + $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']);
377
378 // Finally, stick the unused data back on the end
379 $commentdata .= $AsYetUnusedData;
380
381 //$commentdata .= fread($fd, $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']);
382 $commentdata .= fread($fd, getid3_ogg::OggPageSegmentLength($ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage], 1));
383
384 }
385 $ThisFileInfo['ogg']['comments_raw'][$i]['size'] = getid3_lib::LittleEndian2Int(substr($commentdata, $commentdataoffset, 4));
386
387 // replace avdataoffset with position just after the last vorbiscomment
388 $ThisFileInfo['avdataoffset'] = $ThisFileInfo['ogg']['comments_raw'][$i]['dataoffset'] + $ThisFileInfo['ogg']['comments_raw'][$i]['size'] + 4;
389
390 $commentdataoffset += 4;
391 while ((strlen($commentdata) - $commentdataoffset) < $ThisFileInfo['ogg']['comments_raw'][$i]['size']) {
392 if (($ThisFileInfo['ogg']['comments_raw'][$i]['size'] > $ThisFileInfo['avdataend']) || ($ThisFileInfo['ogg']['comments_raw'][$i]['size'] < 0)) {
393 $ThisFileInfo['error'][] = 'Invalid Ogg comment size (comment #'.$i.', claims to be '.number_format($ThisFileInfo['ogg']['comments_raw'][$i]['size']).' bytes) - aborting reading comments';
394 break 2;
395 }
396
397 $VorbisCommentPage++;
398
399 $oggpageinfo = getid3_ogg::ParseOggPageHeader($fd);
400 $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo;
401
402 // First, save what we haven't read yet
403 $AsYetUnusedData = substr($commentdata, $commentdataoffset);
404
405 // Then take that data off the end
406 $commentdata = substr($commentdata, 0, $commentdataoffset);
407
408 // Add [headerlength] bytes of dummy data for the Ogg Page Header, just to keep absolute offsets correct
409 $commentdata .= str_repeat("\x00", 27 + $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']);
410 $commentdataoffset += (27 + $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']);
411
412 // Finally, stick the unused data back on the end
413 $commentdata .= $AsYetUnusedData;
414
415 //$commentdata .= fread($fd, $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']);
416 $commentdata .= fread($fd, getid3_ogg::OggPageSegmentLength($ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage], 1));
417
418 //$filebaseoffset += $oggpageinfo['header_end_offset'] - $oggpageinfo['page_start_offset'];
419 }
420 $commentstring = substr($commentdata, $commentdataoffset, $ThisFileInfo['ogg']['comments_raw'][$i]['size']);
421 $commentdataoffset += $ThisFileInfo['ogg']['comments_raw'][$i]['size'];
422
423 if (!$commentstring) {
424
425 // no comment?
426 $ThisFileInfo['warning'][] = 'Blank Ogg comment ['.$i.']';
427
428 } elseif (strstr($commentstring, '=')) {
429
430 $commentexploded = explode('=', $commentstring, 2);
431 $ThisFileInfo['ogg']['comments_raw'][$i]['key'] = strtoupper($commentexploded[0]);
432 $ThisFileInfo['ogg']['comments_raw'][$i]['value'] = @$commentexploded[1];
433 $ThisFileInfo['ogg']['comments_raw'][$i]['data'] = base64_decode($ThisFileInfo['ogg']['comments_raw'][$i]['value']);
434
435 $ThisFileInfo['ogg']['comments'][strtolower($ThisFileInfo['ogg']['comments_raw'][$i]['key'])][] = $ThisFileInfo['ogg']['comments_raw'][$i]['value'];
436
437 $imagechunkcheck = getid3_lib::GetDataImageSize($ThisFileInfo['ogg']['comments_raw'][$i]['data']);
438 $ThisFileInfo['ogg']['comments_raw'][$i]['image_mime'] = getid3_lib::image_type_to_mime_type($imagechunkcheck[2]);
439 if (!$ThisFileInfo['ogg']['comments_raw'][$i]['image_mime'] || ($ThisFileInfo['ogg']['comments_raw'][$i]['image_mime'] == 'application/octet-stream')) {
440 unset($ThisFileInfo['ogg']['comments_raw'][$i]['image_mime']);
441 unset($ThisFileInfo['ogg']['comments_raw'][$i]['data']);
442 }
443
444 } else {
445
446 $ThisFileInfo['warning'][] = '[known problem with CDex >= v1.40, < v1.50b7] Invalid Ogg comment name/value pair ['.$i.']: '.$commentstring;
447
448 }
449 }
450
451
452 // Replay Gain Adjustment
453 // http://privatewww.essex.ac.uk/~djmrob/replaygain/
454 if (isset($ThisFileInfo['ogg']['comments']) && is_array($ThisFileInfo['ogg']['comments'])) {
455 foreach ($ThisFileInfo['ogg']['comments'] as $index => $commentvalue) {
456 switch ($index) {
457 case 'rg_audiophile':
458 case 'replaygain_album_gain':
459 $ThisFileInfo['replay_gain']['album']['adjustment'] = (double) $commentvalue[0];
460 unset($ThisFileInfo['ogg']['comments'][$index]);
461 break;
462
463 case 'rg_radio':
464 case 'replaygain_track_gain':
465 $ThisFileInfo['replay_gain']['track']['adjustment'] = (double) $commentvalue[0];
466 unset($ThisFileInfo['ogg']['comments'][$index]);
467 break;
468
469 case 'replaygain_album_peak':
470 $ThisFileInfo['replay_gain']['album']['peak'] = (double) $commentvalue[0];
471 unset($ThisFileInfo['ogg']['comments'][$index]);
472 break;
473
474 case 'rg_peak':
475 case 'replaygain_track_peak':
476 $ThisFileInfo['replay_gain']['track']['peak'] = (double) $commentvalue[0];
477 unset($ThisFileInfo['ogg']['comments'][$index]);
478 break;
479
480
481 default:
482 // do nothing
483 break;
484 }
485 }
486 }
487
488 fseek($fd, $OriginalOffset, SEEK_SET);
489
490 return true;
491 }
492
493 function SpeexBandModeLookup($mode) {
494 static $SpeexBandModeLookup = array();
495 if (empty($SpeexBandModeLookup)) {
496 $SpeexBandModeLookup[0] = 'narrow';
497 $SpeexBandModeLookup[1] = 'wide';
498 $SpeexBandModeLookup[2] = 'ultra-wide';
499 }
500 return (isset($SpeexBandModeLookup[$mode]) ? $SpeexBandModeLookup[$mode] : null);
501 }
502
503
504 function OggPageSegmentLength($OggInfoArray, $SegmentNumber=1) {
505 for ($i = 0; $i < $SegmentNumber; $i++) {
506 $segmentlength = 0;
507 foreach ($OggInfoArray['segment_table'] as $key => $value) {
508 $segmentlength += $value;
509 if ($value < 255) {
510 break;
511 }
512 }
513 }
514 return $segmentlength;
515 }
516
517
518 function get_quality_from_nominal_bitrate($nominal_bitrate) {
519
520 // decrease precision
521 $nominal_bitrate = $nominal_bitrate / 1000;
522
523 if ($nominal_bitrate < 128) {
524 // q-1 to q4
525 $qval = ($nominal_bitrate - 64) / 16;
526 } elseif ($nominal_bitrate < 256) {
527 // q4 to q8
528 $qval = $nominal_bitrate / 32;
529 } elseif ($nominal_bitrate < 320) {
530 // q8 to q9
531 $qval = ($nominal_bitrate + 256) / 64;
532 } else {
533 // q9 to q10
534 $qval = ($nominal_bitrate + 1300) / 180;
535 }
536 //return $qval; // 5.031324
537 //return intval($qval); // 5
538 return round($qval, 1); // 5 or 4.9
539 }
540
541}
542
543?>
getid3_flac\FLACparseMETAdata
FLACparseMETAdata(&$fd, &$ThisFileInfo)
Definition: module.audio.flac.php:40
getid3_handler\fseek
fseek($bytes, $whence=SEEK_SET)
Definition: getid3.php:1697
getid3_handler\ftell
ftell()
Definition: getid3.php:1678
getid3_handler\fread
fread($bytes)
Definition: getid3.php:1685
getid3_handler\feof
feof()
Definition: getid3.php:1727
getid3_lib\LittleEndian2Int
LittleEndian2Int($byteword, $signed=false)
Definition: getid3.lib.php:266
getid3_lib\GetDataImageSize
GetDataImageSize($imgData)
Definition: getid3.lib.php:1170
getid3_lib\image_type_to_mime_type
image_type_to_mime_type($imagetypeid)
Definition: getid3.lib.php:419
getid3_lib\IncludeDependency
IncludeDependency($filename, $sourcefile, $DieOnFailure=false)
Definition: getid3.lib.php:1301
getid3_ogg
Definition: module.audio.ogg.php:19
getid3_ogg\SpeexBandModeLookup
SpeexBandModeLookup($mode)
Definition: module.audio.ogg.php:493
getid3_ogg\ParseVorbisCommentsFilepointer
ParseVorbisCommentsFilepointer(&$fd, &$ThisFileInfo)
Definition: module.audio.ogg.php:313
getid3_ogg\ParseOggPageHeader
ParseOggPageHeader(&$fd)
Definition: module.audio.ogg.php:261
getid3_ogg\ParseOggPageHeader
ParseOggPageHeader()
Definition: module.audio.ogg.php:480
getid3_ogg\get_quality_from_nominal_bitrate
get_quality_from_nominal_bitrate($nominal_bitrate)
Definition: module.audio.ogg.php:518
getid3_ogg\OggPageSegmentLength
OggPageSegmentLength($OggInfoArray, $SegmentNumber=1)
Definition: module.audio.ogg.php:504
getid3_ogg\getid3_ogg
getid3_ogg(&$fd, &$ThisFileInfo)
Definition: module.audio.ogg.php:21
GETID3_FREAD_BUFFER_SIZE
const GETID3_FREAD_BUFFER_SIZE
Definition: getid3.php:14