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module.audio.ogg.php @ 3544

Last change on this file since 3544 was 3544, checked in by vdigital, 15 years ago
Change: getid3 upgraded to -> 1.7.9
Property svn:eol-style set to `LF` Property svn:keywords set to `Author Date Id Revision`
File size: 25.2 KB

Line
1	<?php
2	/////////////////////////////////////////////////////////////////
3	/// getID3() by James Heinrich <info@getid3.org> //
4	// available at http://getid3.sourceforge.net //
5	// or http://www.getid3.org //
6	/////////////////////////////////////////////////////////////////
7	// See readme.txt for more details //
8	/////////////////////////////////////////////////////////////////
9	// //
10	// module.audio.ogg.php //
11	// module for analyzing Ogg Vorbis, OggFLAC and Speex files //
12	// dependencies: module.audio.flac.php //
13	// ///
14	/////////////////////////////////////////////////////////////////
15
16	getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio.flac.php', __FILE__, true);
17
18	class 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	$this->ParseVorbisPageHeader($filedata, $filedataoffset, $ThisFileInfo, $oggpageinfo);
63
64	} elseif (substr($filedata, 0, 8) == 'Speex ') {
65
66	// http://www.speex.org/manual/node10.html
67
68	$ThisFileInfo['audio']['dataformat'] = 'speex';
69	$ThisFileInfo['mime_type'] = 'audio/speex';
70	$ThisFileInfo['audio']['bitrate_mode'] = 'abr';
71	$ThisFileInfo['audio']['lossless'] = false;
72
73	$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_string'] = substr($filedata, $filedataoffset, 8); // hard-coded to 'Speex '
74	$filedataoffset += 8;
75	$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version'] = substr($filedata, $filedataoffset, 20);
76	$filedataoffset += 20;
77	$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version_id'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
78	$filedataoffset += 4;
79	$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['header_size'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
80	$filedataoffset += 4;
81	$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['rate'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
82	$filedataoffset += 4;
83	$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
84	$filedataoffset += 4;
85	$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode_bitstream_version'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
86	$filedataoffset += 4;
87	$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['nb_channels'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
88	$filedataoffset += 4;
89	$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['bitrate'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
90	$filedataoffset += 4;
91	$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['framesize'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
92	$filedataoffset += 4;
93	$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['vbr'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
94	$filedataoffset += 4;
95	$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['frames_per_packet'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
96	$filedataoffset += 4;
97	$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['extra_headers'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
98	$filedataoffset += 4;
99	$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['reserved1'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
100	$filedataoffset += 4;
101	$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['reserved2'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
102	$filedataoffset += 4;
103
104	$ThisFileInfo['speex']['speex_version'] = trim($ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version']);
105	$ThisFileInfo['speex']['sample_rate'] = $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['rate'];
106	$ThisFileInfo['speex']['channels'] = $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['nb_channels'];
107	$ThisFileInfo['speex']['vbr'] = (bool) $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['vbr'];
108	$ThisFileInfo['speex']['band_type'] = getid3_ogg::SpeexBandModeLookup($ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode']);
109
110	$ThisFileInfo['audio']['sample_rate'] = $ThisFileInfo['speex']['sample_rate'];
111	$ThisFileInfo['audio']['channels'] = $ThisFileInfo['speex']['channels'];
112	if ($ThisFileInfo['speex']['vbr']) {
113	$ThisFileInfo['audio']['bitrate_mode'] = 'vbr';
114	}
115
116	} else {
117
118	$ThisFileInfo['error'][] = 'Expecting either "Speex " or "vorbis" identifier strings, found neither';
119	unset($ThisFileInfo['ogg']);
120	unset($ThisFileInfo['mime_type']);
121	return false;
122
123	}
124
125
126	// Page 2 - Comment Header
127
128	$oggpageinfo = getid3_ogg::ParseOggPageHeader($fd);
129	$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo;
130
131	switch ($ThisFileInfo['audio']['dataformat']) {
132
133	case 'vorbis':
134	$filedata = fread($fd, $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']);
135	$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['packet_type'] = getid3_lib::LittleEndian2Int(substr($filedata, 0, 1));
136	$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['stream_type'] = substr($filedata, 1, 6); // hard-coded to 'vorbis'
137
138	getid3_ogg::ParseVorbisCommentsFilepointer($fd, $ThisFileInfo);
139	break;
140
141	case 'flac':
142	if (!getid3_flac::FLACparseMETAdata($fd, $ThisFileInfo)) {
143	$ThisFileInfo['error'][] = 'Failed to parse FLAC headers';
144	return false;
145	}
146	break;
147
148	case 'speex':
149	fseek($fd, $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length'], SEEK_CUR);
150	getid3_ogg::ParseVorbisCommentsFilepointer($fd, $ThisFileInfo);
151	break;
152
153	}
154
155
156
157	// Last Page - Number of Samples
158
159	if ($ThisFileInfo['avdataend'] >= pow(2, 31)) {
160
161	$ThisFileInfo['warning'][] = 'Unable to parse Ogg end chunk file (PHP does not support file operations beyond 2GB)';
162
163	} else {
164
165	fseek($fd, max($ThisFileInfo['avdataend'] - GETID3_FREAD_BUFFER_SIZE, 0), SEEK_SET);
166	$LastChunkOfOgg = strrev(fread($fd, GETID3_FREAD_BUFFER_SIZE));
167	if ($LastOggSpostion = strpos($LastChunkOfOgg, 'SggO')) {
168	fseek($fd, $ThisFileInfo['avdataend'] - ($LastOggSpostion + strlen('SggO')), SEEK_SET);
169	$ThisFileInfo['avdataend'] = ftell($fd);
170	$ThisFileInfo['ogg']['pageheader']['eos'] = getid3_ogg::ParseOggPageHeader($fd);
171	$ThisFileInfo['ogg']['samples'] = $ThisFileInfo['ogg']['pageheader']['eos']['pcm_abs_position'];
172	if ($ThisFileInfo['ogg']['samples'] == 0) {
173	$ThisFileInfo['error'][] = 'Corrupt Ogg file: eos.number of samples == zero';
174	return false;
175	}
176	$ThisFileInfo['ogg']['bitrate_average'] = (($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) * 8) / ($ThisFileInfo['ogg']['samples'] / $ThisFileInfo['audio']['sample_rate']);
177	}
178
179	}
180
181	if (!empty($ThisFileInfo['ogg']['bitrate_average'])) {
182	$ThisFileInfo['audio']['bitrate'] = $ThisFileInfo['ogg']['bitrate_average'];
183	} elseif (!empty($ThisFileInfo['ogg']['bitrate_nominal'])) {
184	$ThisFileInfo['audio']['bitrate'] = $ThisFileInfo['ogg']['bitrate_nominal'];
185	} elseif (!empty($ThisFileInfo['ogg']['bitrate_min']) && !empty($ThisFileInfo['ogg']['bitrate_max'])) {
186	$ThisFileInfo['audio']['bitrate'] = ($ThisFileInfo['ogg']['bitrate_min'] + $ThisFileInfo['ogg']['bitrate_max']) / 2;
187	}
188	if (isset($ThisFileInfo['audio']['bitrate']) && !isset($ThisFileInfo['playtime_seconds'])) {
189	if ($ThisFileInfo['audio']['bitrate'] == 0) {
190	$ThisFileInfo['error'][] = 'Corrupt Ogg file: bitrate_audio == zero';
191	return false;
192	}
193	$ThisFileInfo['playtime_seconds'] = (float) ((($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) * 8) / $ThisFileInfo['audio']['bitrate']);
194	}
195
196	if (isset($ThisFileInfo['ogg']['vendor'])) {
197	$ThisFileInfo['audio']['encoder'] = preg_replace('/^Encoded with /', '', $ThisFileInfo['ogg']['vendor']);
198
199	// Vorbis only
200	if ($ThisFileInfo['audio']['dataformat'] == 'vorbis') {
201
202	// Vorbis 1.0 starts with Xiph.Org
203	if (preg_match('/^Xiph.Org/', $ThisFileInfo['audio']['encoder'])) {
204
205	if ($ThisFileInfo['audio']['bitrate_mode'] == 'abr') {
206
207	// Set -b 128 on abr files
208	$ThisFileInfo['audio']['encoder_options'] = '-b '.round($ThisFileInfo['ogg']['bitrate_nominal'] / 1000);
209
210	} elseif (($ThisFileInfo['audio']['bitrate_mode'] == 'vbr') && ($ThisFileInfo['audio']['channels'] == 2) && ($ThisFileInfo['audio']['sample_rate'] >= 44100) && ($ThisFileInfo['audio']['sample_rate'] <= 48000)) {
211	// Set -q N on vbr files
212	$ThisFileInfo['audio']['encoder_options'] = '-q '.$this->get_quality_from_nominal_bitrate($ThisFileInfo['ogg']['bitrate_nominal']);
213
214	}
215	}
216
217	if (empty($ThisFileInfo['audio']['encoder_options']) && !empty($ThisFileInfo['ogg']['bitrate_nominal'])) {
218	$ThisFileInfo['audio']['encoder_options'] = 'Nominal bitrate: '.intval(round($ThisFileInfo['ogg']['bitrate_nominal'] / 1000)).'kbps';
219	}
220	}
221	}
222
223	return true;
224	}
225
226	function ParseVorbisPageHeader(&$filedata, &$filedataoffset, &$ThisFileInfo, &$oggpageinfo) {
227	$ThisFileInfo['audio']['dataformat'] = 'vorbis';
228	$ThisFileInfo['audio']['lossless'] = false;
229
230	$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['packet_type'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));
231	$filedataoffset += 1;
232	$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['stream_type'] = substr($filedata, $filedataoffset, 6); // hard-coded to 'vorbis'
233	$filedataoffset += 6;
234	$ThisFileInfo['ogg']['bitstreamversion'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
235	$filedataoffset += 4;
236	$ThisFileInfo['ogg']['numberofchannels'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));
237	$filedataoffset += 1;
238	$ThisFileInfo['audio']['channels'] = $ThisFileInfo['ogg']['numberofchannels'];
239	$ThisFileInfo['ogg']['samplerate'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
240	$filedataoffset += 4;
241	if ($ThisFileInfo['ogg']['samplerate'] == 0) {
242	$ThisFileInfo['error'][] = 'Corrupt Ogg file: sample rate == zero';
243	return false;
244	}
245	$ThisFileInfo['audio']['sample_rate'] = $ThisFileInfo['ogg']['samplerate'];
246	$ThisFileInfo['ogg']['samples'] = 0; // filled in later
247	$ThisFileInfo['ogg']['bitrate_average'] = 0; // filled in later
248	$ThisFileInfo['ogg']['bitrate_max'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
249	$filedataoffset += 4;
250	$ThisFileInfo['ogg']['bitrate_nominal'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
251	$filedataoffset += 4;
252	$ThisFileInfo['ogg']['bitrate_min'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
253	$filedataoffset += 4;
254	$ThisFileInfo['ogg']['blocksize_small'] = pow(2, getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)) & 0x0F);
255	$ThisFileInfo['ogg']['blocksize_large'] = pow(2, (getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)) & 0xF0) >> 4);
256	$ThisFileInfo['ogg']['stop_bit'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); // must be 1, marks end of packet
257
258	$ThisFileInfo['audio']['bitrate_mode'] = 'vbr'; // overridden if actually abr
259	if ($ThisFileInfo['ogg']['bitrate_max'] == 0xFFFFFFFF) {
260	unset($ThisFileInfo['ogg']['bitrate_max']);
261	$ThisFileInfo['audio']['bitrate_mode'] = 'abr';
262	}
263	if ($ThisFileInfo['ogg']['bitrate_nominal'] == 0xFFFFFFFF) {
264	unset($ThisFileInfo['ogg']['bitrate_nominal']);
265	}
266	if ($ThisFileInfo['ogg']['bitrate_min'] == 0xFFFFFFFF) {
267	unset($ThisFileInfo['ogg']['bitrate_min']);
268	$ThisFileInfo['audio']['bitrate_mode'] = 'abr';
269	}
270	return true;
271	}
272
273	function ParseOggPageHeader(&$fd) {
274	// http://xiph.org/ogg/vorbis/doc/framing.html
275	$oggheader['page_start_offset'] = ftell($fd); // where we started from in the file
276
277	$filedata = fread($fd, GETID3_FREAD_BUFFER_SIZE);
278	$filedataoffset = 0;
279	while ((substr($filedata, $filedataoffset++, 4) != 'OggS')) {
280	if ((ftell($fd) - $oggheader['page_start_offset']) >= GETID3_FREAD_BUFFER_SIZE) {
281	// should be found before here
282	return false;
283	}
284	if ((($filedataoffset + 28) > strlen($filedata)) \|\| (strlen($filedata) < 28)) {
285	if (feof($fd) \|\| (($filedata .= fread($fd, GETID3_FREAD_BUFFER_SIZE)) === false)) {
286	// get some more data, unless eof, in which case fail
287	return false;
288	}
289	}
290	}
291	$filedataoffset += strlen('OggS') - 1; // page, delimited by 'OggS'
292
293	$oggheader['stream_structver'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));
294	$filedataoffset += 1;
295	$oggheader['flags_raw'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));
296	$filedataoffset += 1;
297	$oggheader['flags']['fresh'] = (bool) ($oggheader['flags_raw'] & 0x01); // fresh packet
298	$oggheader['flags']['bos'] = (bool) ($oggheader['flags_raw'] & 0x02); // first page of logical bitstream (bos)
299	$oggheader['flags']['eos'] = (bool) ($oggheader['flags_raw'] & 0x04); // last page of logical bitstream (eos)
300
301	$oggheader['pcm_abs_position'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8));
302	$filedataoffset += 8;
303	$oggheader['stream_serialno'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
304	$filedataoffset += 4;
305	$oggheader['page_seqno'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
306	$filedataoffset += 4;
307	$oggheader['page_checksum'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
308	$filedataoffset += 4;
309	$oggheader['page_segments'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));
310	$filedataoffset += 1;
311	$oggheader['page_length'] = 0;
312	for ($i = 0; $i < $oggheader['page_segments']; $i++) {
313	$oggheader['segment_table'][$i] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));
314	$filedataoffset += 1;
315	$oggheader['page_length'] += $oggheader['segment_table'][$i];
316	}
317	$oggheader['header_end_offset'] = $oggheader['page_start_offset'] + $filedataoffset;
318	$oggheader['page_end_offset'] = $oggheader['header_end_offset'] + $oggheader['page_length'];
319	fseek($fd, $oggheader['header_end_offset'], SEEK_SET);
320
321	return $oggheader;
322	}
323
324
325	function ParseVorbisCommentsFilepointer(&$fd, &$ThisFileInfo) {
326
327	$OriginalOffset = ftell($fd);
328	$CommentStartOffset = $OriginalOffset;
329	$commentdataoffset = 0;
330	$VorbisCommentPage = 1;
331
332	switch ($ThisFileInfo['audio']['dataformat']) {
333	case 'vorbis':
334	$CommentStartOffset = $ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage]['page_start_offset']; // Second Ogg page, after header block
335	fseek($fd, $CommentStartOffset, SEEK_SET);
336	$commentdataoffset = 27 + $ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage]['page_segments'];
337	$commentdata = fread($fd, getid3_ogg::OggPageSegmentLength($ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage], 1) + $commentdataoffset);
338
339	$commentdataoffset += (strlen('vorbis') + 1);
340	break;
341
342	case 'flac':
343	fseek($fd, $ThisFileInfo['flac']['VORBIS_COMMENT']['raw']['offset'] + 4, SEEK_SET);
344	$commentdata = fread($fd, $ThisFileInfo['flac']['VORBIS_COMMENT']['raw']['block_length']);
345	break;
346
347	case 'speex':
348	$CommentStartOffset = $ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage]['page_start_offset']; // Second Ogg page, after header block
349	fseek($fd, $CommentStartOffset, SEEK_SET);
350	$commentdataoffset = 27 + $ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage]['page_segments'];
351	$commentdata = fread($fd, getid3_ogg::OggPageSegmentLength($ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage], 1) + $commentdataoffset);
352	break;
353
354	default:
355	return false;
356	break;
357	}
358
359	$VendorSize = getid3_lib::LittleEndian2Int(substr($commentdata, $commentdataoffset, 4));
360	$commentdataoffset += 4;
361
362	$ThisFileInfo['ogg']['vendor'] = substr($commentdata, $commentdataoffset, $VendorSize);
363	$commentdataoffset += $VendorSize;
364
365	$CommentsCount = getid3_lib::LittleEndian2Int(substr($commentdata, $commentdataoffset, 4));
366	$commentdataoffset += 4;
367	$ThisFileInfo['avdataoffset'] = $CommentStartOffset + $commentdataoffset;
368
369	$basicfields = array('TITLE', 'ARTIST', 'ALBUM', 'TRACKNUMBER', 'GENRE', 'DATE', 'DESCRIPTION', 'COMMENT');
370	for ($i = 0; $i < $CommentsCount; $i++) {
371
372	$ThisFileInfo['ogg']['comments_raw'][$i]['dataoffset'] = $CommentStartOffset + $commentdataoffset;
373
374	if (ftell($fd) < ($ThisFileInfo['ogg']['comments_raw'][$i]['dataoffset'] + 4)) {
375	$VorbisCommentPage++;
376
377	$oggpageinfo = getid3_ogg::ParseOggPageHeader($fd);
378	$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo;
379
380	// First, save what we haven't read yet
381	$AsYetUnusedData = substr($commentdata, $commentdataoffset);
382
383	// Then take that data off the end
384	$commentdata = substr($commentdata, 0, $commentdataoffset);
385
386	// Add [headerlength] bytes of dummy data for the Ogg Page Header, just to keep absolute offsets correct
387	$commentdata .= str_repeat("\x00", 27 + $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']);
388	$commentdataoffset += (27 + $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']);
389
390	// Finally, stick the unused data back on the end
391	$commentdata .= $AsYetUnusedData;
392
393	//$commentdata .= fread($fd, $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']);
394	$commentdata .= fread($fd, getid3_ogg::OggPageSegmentLength($ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage], 1));
395
396	}
397	$ThisFileInfo['ogg']['comments_raw'][$i]['size'] = getid3_lib::LittleEndian2Int(substr($commentdata, $commentdataoffset, 4));
398
399	// replace avdataoffset with position just after the last vorbiscomment
400	$ThisFileInfo['avdataoffset'] = $ThisFileInfo['ogg']['comments_raw'][$i]['dataoffset'] + $ThisFileInfo['ogg']['comments_raw'][$i]['size'] + 4;
401
402	$commentdataoffset += 4;
403	while ((strlen($commentdata) - $commentdataoffset) < $ThisFileInfo['ogg']['comments_raw'][$i]['size']) {
404	if (($ThisFileInfo['ogg']['comments_raw'][$i]['size'] > $ThisFileInfo['avdataend']) \|\| ($ThisFileInfo['ogg']['comments_raw'][$i]['size'] < 0)) {
405	$ThisFileInfo['error'][] = 'Invalid Ogg comment size (comment #'.$i.', claims to be '.number_format($ThisFileInfo['ogg']['comments_raw'][$i]['size']).' bytes) - aborting reading comments';
406	break 2;
407	}
408
409	$VorbisCommentPage++;
410
411	$oggpageinfo = getid3_ogg::ParseOggPageHeader($fd);
412	$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo;
413
414	// First, save what we haven't read yet
415	$AsYetUnusedData = substr($commentdata, $commentdataoffset);
416
417	// Then take that data off the end
418	$commentdata = substr($commentdata, 0, $commentdataoffset);
419
420	// Add [headerlength] bytes of dummy data for the Ogg Page Header, just to keep absolute offsets correct
421	$commentdata .= str_repeat("\x00", 27 + $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']);
422	$commentdataoffset += (27 + $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']);
423
424	// Finally, stick the unused data back on the end
425	$commentdata .= $AsYetUnusedData;
426
427	//$commentdata .= fread($fd, $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']);
428	$commentdata .= fread($fd, getid3_ogg::OggPageSegmentLength($ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage], 1));
429
430	//$filebaseoffset += $oggpageinfo['header_end_offset'] - $oggpageinfo['page_start_offset'];
431	}
432	$commentstring = substr($commentdata, $commentdataoffset, $ThisFileInfo['ogg']['comments_raw'][$i]['size']);
433	$commentdataoffset += $ThisFileInfo['ogg']['comments_raw'][$i]['size'];
434
435	if (!$commentstring) {
436
437	// no comment?
438	$ThisFileInfo['warning'][] = 'Blank Ogg comment ['.$i.']';
439
440	} elseif (strstr($commentstring, '=')) {
441
442	$commentexploded = explode('=', $commentstring, 2);
443	$ThisFileInfo['ogg']['comments_raw'][$i]['key'] = strtoupper($commentexploded[0]);
444	$ThisFileInfo['ogg']['comments_raw'][$i]['value'] = @$commentexploded[1];
445	$ThisFileInfo['ogg']['comments_raw'][$i]['data'] = base64_decode($ThisFileInfo['ogg']['comments_raw'][$i]['value']);
446
447	$ThisFileInfo['ogg']['comments'][strtolower($ThisFileInfo['ogg']['comments_raw'][$i]['key'])][] = $ThisFileInfo['ogg']['comments_raw'][$i]['value'];
448
449	$imageinfo = array();
450	$imagechunkcheck = getid3_lib::GetDataImageSize($ThisFileInfo['ogg']['comments_raw'][$i]['data'], $imageinfo);
451	$ThisFileInfo['ogg']['comments_raw'][$i]['image_mime'] = getid3_lib::image_type_to_mime_type($imagechunkcheck[2]);
452	if (!$ThisFileInfo['ogg']['comments_raw'][$i]['image_mime'] \|\| ($ThisFileInfo['ogg']['comments_raw'][$i]['image_mime'] == 'application/octet-stream')) {
453	unset($ThisFileInfo['ogg']['comments_raw'][$i]['image_mime']);
454	unset($ThisFileInfo['ogg']['comments_raw'][$i]['data']);
455	}
456
457	} else {
458
459	$ThisFileInfo['warning'][] = '[known problem with CDex >= v1.40, < v1.50b7] Invalid Ogg comment name/value pair ['.$i.']: '.$commentstring;
460
461	}
462	}
463
464
465	// Replay Gain Adjustment
466	// http://privatewww.essex.ac.uk/~djmrob/replaygain/
467	if (isset($ThisFileInfo['ogg']['comments']) && is_array($ThisFileInfo['ogg']['comments'])) {
468	foreach ($ThisFileInfo['ogg']['comments'] as $index => $commentvalue) {
469	switch ($index) {
470	case 'rg_audiophile':
471	case 'replaygain_album_gain':
472	$ThisFileInfo['replay_gain']['album']['adjustment'] = (double) $commentvalue[0];
473	unset($ThisFileInfo['ogg']['comments'][$index]);
474	break;
475
476	case 'rg_radio':
477	case 'replaygain_track_gain':
478	$ThisFileInfo['replay_gain']['track']['adjustment'] = (double) $commentvalue[0];
479	unset($ThisFileInfo['ogg']['comments'][$index]);
480	break;
481
482	case 'replaygain_album_peak':
483	$ThisFileInfo['replay_gain']['album']['peak'] = (double) $commentvalue[0];
484	unset($ThisFileInfo['ogg']['comments'][$index]);
485	break;
486
487	case 'rg_peak':
488	case 'replaygain_track_peak':
489	$ThisFileInfo['replay_gain']['track']['peak'] = (double) $commentvalue[0];
490	unset($ThisFileInfo['ogg']['comments'][$index]);
491	break;
492
493
494	default:
495	// do nothing
496	break;
497	}
498	}
499	}
500
501	fseek($fd, $OriginalOffset, SEEK_SET);
502
503	return true;
504	}
505
506	function SpeexBandModeLookup($mode) {
507	static $SpeexBandModeLookup = array();
508	if (empty($SpeexBandModeLookup)) {
509	$SpeexBandModeLookup[0] = 'narrow';
510	$SpeexBandModeLookup[1] = 'wide';
511	$SpeexBandModeLookup[2] = 'ultra-wide';
512	}
513	return (isset($SpeexBandModeLookup[$mode]) ? $SpeexBandModeLookup[$mode] : null);
514	}
515
516
517	function OggPageSegmentLength($OggInfoArray, $SegmentNumber=1) {
518	for ($i = 0; $i < $SegmentNumber; $i++) {
519	$segmentlength = 0;
520	foreach ($OggInfoArray['segment_table'] as $key => $value) {
521	$segmentlength += $value;
522	if ($value < 255) {
523	break;
524	}
525	}
526	}
527	return $segmentlength;
528	}
529
530
531	function get_quality_from_nominal_bitrate($nominal_bitrate) {
532
533	// decrease precision
534	$nominal_bitrate = $nominal_bitrate / 1000;
535
536	if ($nominal_bitrate < 128) {
537	// q-1 to q4
538	$qval = ($nominal_bitrate - 64) / 16;
539	} elseif ($nominal_bitrate < 256) {
540	// q4 to q8
541	$qval = $nominal_bitrate / 32;
542	} elseif ($nominal_bitrate < 320) {
543	// q8 to q9
544	$qval = ($nominal_bitrate + 256) / 64;
545	} else {
546	// q9 to q10
547	$qval = ($nominal_bitrate + 1300) / 180;
548	}
549	//return $qval; // 5.031324
550	//return intval($qval); // 5
551	return round($qval, 1); // 5 or 4.9
552	}
553
554	}
555
556	?>

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

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