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[SPIP] ~maj v3.2.9-->v3.2.11
[lhc/web/www.git] / www / plugins-dist / medias / lib / getid3 / module.audio-video.flv.php
1 <?php
2 /////////////////////////////////////////////////////////////////
3 /// getID3() by James Heinrich <info@getid3.org> //
4 // available at https://github.com/JamesHeinrich/getID3 //
5 // or https://www.getid3.org //
6 // or http://getid3.sourceforge.net //
7 // see readme.txt for more details //
8 /////////////////////////////////////////////////////////////////
9 // //
10 // module.audio-video.flv.php //
11 // module for analyzing Shockwave Flash Video files //
12 // dependencies: NONE //
13 // //
14 /////////////////////////////////////////////////////////////////
15 // //
16 // FLV module by Seth Kaufman <sethØwhirl-i-gig*com> //
17 // //
18 // * version 0.1 (26 June 2005) //
19 // //
20 // * version 0.1.1 (15 July 2005) //
21 // minor modifications by James Heinrich <info@getid3.org> //
22 // //
23 // * version 0.2 (22 February 2006) //
24 // Support for On2 VP6 codec and meta information //
25 // by Steve Webster <steve.websterØfeaturecreep*com> //
26 // //
27 // * version 0.3 (15 June 2006) //
28 // Modified to not read entire file into memory //
29 // by James Heinrich <info@getid3.org> //
30 // //
31 // * version 0.4 (07 December 2007) //
32 // Bugfixes for incorrectly parsed FLV dimensions //
33 // and incorrect parsing of onMetaTag //
34 // by Evgeny Moysevich <moysevichØgmail*com> //
35 // //
36 // * version 0.5 (21 May 2009) //
37 // Fixed parsing of audio tags and added additional codec //
38 // details. The duration is now read from onMetaTag (if //
39 // exists), rather than parsing whole file //
40 // by Nigel Barnes <ngbarnesØhotmail*com> //
41 // //
42 // * version 0.6 (24 May 2009) //
43 // Better parsing of files with h264 video //
44 // by Evgeny Moysevich <moysevichØgmail*com> //
45 // //
46 // * version 0.6.1 (30 May 2011) //
47 // prevent infinite loops in expGolombUe() //
48 // //
49 // * version 0.7.0 (16 Jul 2013) //
50 // handle GETID3_FLV_VIDEO_VP6FLV_ALPHA //
51 // improved AVCSequenceParameterSetReader::readData() //
52 // by Xander Schouwerwou <schouwerwouØgmail*com> //
53 // ///
54 /////////////////////////////////////////////////////////////////
55
56 if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers
57 exit;
58 }
59
60 define('GETID3_FLV_TAG_AUDIO', 8);
61 define('GETID3_FLV_TAG_VIDEO', 9);
62 define('GETID3_FLV_TAG_META', 18);
63
64 define('GETID3_FLV_VIDEO_H263', 2);
65 define('GETID3_FLV_VIDEO_SCREEN', 3);
66 define('GETID3_FLV_VIDEO_VP6FLV', 4);
67 define('GETID3_FLV_VIDEO_VP6FLV_ALPHA', 5);
68 define('GETID3_FLV_VIDEO_SCREENV2', 6);
69 define('GETID3_FLV_VIDEO_H264', 7);
70
71 define('H264_AVC_SEQUENCE_HEADER', 0);
72 define('H264_PROFILE_BASELINE', 66);
73 define('H264_PROFILE_MAIN', 77);
74 define('H264_PROFILE_EXTENDED', 88);
75 define('H264_PROFILE_HIGH', 100);
76 define('H264_PROFILE_HIGH10', 110);
77 define('H264_PROFILE_HIGH422', 122);
78 define('H264_PROFILE_HIGH444', 144);
79 define('H264_PROFILE_HIGH444_PREDICTIVE', 244);
80
81 class getid3_flv extends getid3_handler
82 {
83 const magic = 'FLV';
84
85 /**
86 * Break out of the loop if too many frames have been scanned; only scan this
87 * many if meta frame does not contain useful duration.
88 *
89 * @var int
90 */
91 public $max_frames = 100000;
92
93 /**
94 * @return bool
95 */
96 public function Analyze() {
97 $info = &$this->getid3->info;
98
99 $this->fseek($info['avdataoffset']);
100
101 $FLVdataLength = $info['avdataend'] - $info['avdataoffset'];
102 $FLVheader = $this->fread(5);
103
104 $info['fileformat'] = 'flv';
105 $info['flv']['header']['signature'] = substr($FLVheader, 0, 3);
106 $info['flv']['header']['version'] = getid3_lib::BigEndian2Int(substr($FLVheader, 3, 1));
107 $TypeFlags = getid3_lib::BigEndian2Int(substr($FLVheader, 4, 1));
108
109 if ($info['flv']['header']['signature'] != self::magic) {
110 $this->error('Expecting "'.getid3_lib::PrintHexBytes(self::magic).'" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes($info['flv']['header']['signature']).'"');
111 unset($info['flv'], $info['fileformat']);
112 return false;
113 }
114
115 $info['flv']['header']['hasAudio'] = (bool) ($TypeFlags & 0x04);
116 $info['flv']['header']['hasVideo'] = (bool) ($TypeFlags & 0x01);
117
118 $FrameSizeDataLength = getid3_lib::BigEndian2Int($this->fread(4));
119 $FLVheaderFrameLength = 9;
120 if ($FrameSizeDataLength > $FLVheaderFrameLength) {
121 $this->fseek($FrameSizeDataLength - $FLVheaderFrameLength, SEEK_CUR);
122 }
123 $Duration = 0;
124 $found_video = false;
125 $found_audio = false;
126 $found_meta = false;
127 $found_valid_meta_playtime = false;
128 $tagParseCount = 0;
129 $info['flv']['framecount'] = array('total'=>0, 'audio'=>0, 'video'=>0);
130 $flv_framecount = &$info['flv']['framecount'];
131 while ((($this->ftell() + 16) < $info['avdataend']) && (($tagParseCount++ <= $this->max_frames) || !$found_valid_meta_playtime)) {
132 $ThisTagHeader = $this->fread(16);
133
134 $PreviousTagLength = getid3_lib::BigEndian2Int(substr($ThisTagHeader, 0, 4));
135 $TagType = getid3_lib::BigEndian2Int(substr($ThisTagHeader, 4, 1));
136 $DataLength = getid3_lib::BigEndian2Int(substr($ThisTagHeader, 5, 3));
137 $Timestamp = getid3_lib::BigEndian2Int(substr($ThisTagHeader, 8, 3));
138 $LastHeaderByte = getid3_lib::BigEndian2Int(substr($ThisTagHeader, 15, 1));
139 $NextOffset = $this->ftell() - 1 + $DataLength;
140 if ($Timestamp > $Duration) {
141 $Duration = $Timestamp;
142 }
143
144 $flv_framecount['total']++;
145 switch ($TagType) {
146 case GETID3_FLV_TAG_AUDIO:
147 $flv_framecount['audio']++;
148 if (!$found_audio) {
149 $found_audio = true;
150 $info['flv']['audio']['audioFormat'] = ($LastHeaderByte >> 4) & 0x0F;
151 $info['flv']['audio']['audioRate'] = ($LastHeaderByte >> 2) & 0x03;
152 $info['flv']['audio']['audioSampleSize'] = ($LastHeaderByte >> 1) & 0x01;
153 $info['flv']['audio']['audioType'] = $LastHeaderByte & 0x01;
154 }
155 break;
156
157 case GETID3_FLV_TAG_VIDEO:
158 $flv_framecount['video']++;
159 if (!$found_video) {
160 $found_video = true;
161 $info['flv']['video']['videoCodec'] = $LastHeaderByte & 0x07;
162
163 $FLVvideoHeader = $this->fread(11);
164
165 if ($info['flv']['video']['videoCodec'] == GETID3_FLV_VIDEO_H264) {
166 // this code block contributed by: moysevichØgmail*com
167
168 $AVCPacketType = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 0, 1));
169 if ($AVCPacketType == H264_AVC_SEQUENCE_HEADER) {
170 // read AVCDecoderConfigurationRecord
171 $configurationVersion = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 4, 1));
172 $AVCProfileIndication = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 5, 1));
173 $profile_compatibility = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 6, 1));
174 $lengthSizeMinusOne = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 7, 1));
175 $numOfSequenceParameterSets = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 8, 1));
176
177 if (($numOfSequenceParameterSets & 0x1F) != 0) {
178 // there is at least one SequenceParameterSet
179 // read size of the first SequenceParameterSet
180 //$spsSize = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 9, 2));
181 $spsSize = getid3_lib::LittleEndian2Int(substr($FLVvideoHeader, 9, 2));
182 // read the first SequenceParameterSet
183 $sps = $this->fread($spsSize);
184 if (strlen($sps) == $spsSize) { // make sure that whole SequenceParameterSet was red
185 $spsReader = new AVCSequenceParameterSetReader($sps);
186 $spsReader->readData();
187 $info['video']['resolution_x'] = $spsReader->getWidth();
188 $info['video']['resolution_y'] = $spsReader->getHeight();
189 }
190 }
191 }
192 // end: moysevichØgmail*com
193
194 } elseif ($info['flv']['video']['videoCodec'] == GETID3_FLV_VIDEO_H263) {
195
196 $PictureSizeType = (getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 3, 2))) >> 7;
197 $PictureSizeType = $PictureSizeType & 0x0007;
198 $info['flv']['header']['videoSizeType'] = $PictureSizeType;
199 switch ($PictureSizeType) {
200 case 0:
201 //$PictureSizeEnc = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 5, 2));
202 //$PictureSizeEnc <<= 1;
203 //$info['video']['resolution_x'] = ($PictureSizeEnc & 0xFF00) >> 8;
204 //$PictureSizeEnc = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 6, 2));
205 //$PictureSizeEnc <<= 1;
206 //$info['video']['resolution_y'] = ($PictureSizeEnc & 0xFF00) >> 8;
207
208 $PictureSizeEnc['x'] = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 4, 2)) >> 7;
209 $PictureSizeEnc['y'] = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 5, 2)) >> 7;
210 $info['video']['resolution_x'] = $PictureSizeEnc['x'] & 0xFF;
211 $info['video']['resolution_y'] = $PictureSizeEnc['y'] & 0xFF;
212 break;
213
214 case 1:
215 $PictureSizeEnc['x'] = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 4, 3)) >> 7;
216 $PictureSizeEnc['y'] = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 6, 3)) >> 7;
217 $info['video']['resolution_x'] = $PictureSizeEnc['x'] & 0xFFFF;
218 $info['video']['resolution_y'] = $PictureSizeEnc['y'] & 0xFFFF;
219 break;
220
221 case 2:
222 $info['video']['resolution_x'] = 352;
223 $info['video']['resolution_y'] = 288;
224 break;
225
226 case 3:
227 $info['video']['resolution_x'] = 176;
228 $info['video']['resolution_y'] = 144;
229 break;
230
231 case 4:
232 $info['video']['resolution_x'] = 128;
233 $info['video']['resolution_y'] = 96;
234 break;
235
236 case 5:
237 $info['video']['resolution_x'] = 320;
238 $info['video']['resolution_y'] = 240;
239 break;
240
241 case 6:
242 $info['video']['resolution_x'] = 160;
243 $info['video']['resolution_y'] = 120;
244 break;
245
246 default:
247 $info['video']['resolution_x'] = 0;
248 $info['video']['resolution_y'] = 0;
249 break;
250
251 }
252
253 } elseif ($info['flv']['video']['videoCodec'] == GETID3_FLV_VIDEO_VP6FLV_ALPHA) {
254
255 /* contributed by schouwerwouØgmail*com */
256 if (!isset($info['video']['resolution_x'])) { // only when meta data isn't set
257 $PictureSizeEnc['x'] = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 6, 2));
258 $PictureSizeEnc['y'] = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 7, 2));
259 $info['video']['resolution_x'] = ($PictureSizeEnc['x'] & 0xFF) << 3;
260 $info['video']['resolution_y'] = ($PictureSizeEnc['y'] & 0xFF) << 3;
261 }
262 /* end schouwerwouØgmail*com */
263
264 }
265 if (!empty($info['video']['resolution_x']) && !empty($info['video']['resolution_y'])) {
266 $info['video']['pixel_aspect_ratio'] = $info['video']['resolution_x'] / $info['video']['resolution_y'];
267 }
268 }
269 break;
270
271 // Meta tag
272 case GETID3_FLV_TAG_META:
273 if (!$found_meta) {
274 $found_meta = true;
275 $this->fseek(-1, SEEK_CUR);
276 $datachunk = $this->fread($DataLength);
277 $AMFstream = new AMFStream($datachunk);
278 $reader = new AMFReader($AMFstream);
279 $eventName = $reader->readData();
280 $info['flv']['meta'][$eventName] = $reader->readData();
281 unset($reader);
282
283 $copykeys = array('framerate'=>'frame_rate', 'width'=>'resolution_x', 'height'=>'resolution_y', 'audiodatarate'=>'bitrate', 'videodatarate'=>'bitrate');
284 foreach ($copykeys as $sourcekey => $destkey) {
285 if (isset($info['flv']['meta']['onMetaData'][$sourcekey])) {
286 switch ($sourcekey) {
287 case 'width':
288 case 'height':
289 $info['video'][$destkey] = intval(round($info['flv']['meta']['onMetaData'][$sourcekey]));
290 break;
291 case 'audiodatarate':
292 $info['audio'][$destkey] = getid3_lib::CastAsInt(round($info['flv']['meta']['onMetaData'][$sourcekey] * 1000));
293 break;
294 case 'videodatarate':
295 case 'frame_rate':
296 default:
297 $info['video'][$destkey] = $info['flv']['meta']['onMetaData'][$sourcekey];
298 break;
299 }
300 }
301 }
302 if (!empty($info['flv']['meta']['onMetaData']['duration'])) {
303 $found_valid_meta_playtime = true;
304 }
305 }
306 break;
307
308 default:
309 // noop
310 break;
311 }
312 $this->fseek($NextOffset);
313 }
314
315 $info['playtime_seconds'] = $Duration / 1000;
316 if ($info['playtime_seconds'] > 0) {
317 $info['bitrate'] = (($info['avdataend'] - $info['avdataoffset']) * 8) / $info['playtime_seconds'];
318 }
319
320 if ($info['flv']['header']['hasAudio']) {
321 $info['audio']['codec'] = self::audioFormatLookup($info['flv']['audio']['audioFormat']);
322 $info['audio']['sample_rate'] = self::audioRateLookup($info['flv']['audio']['audioRate']);
323 $info['audio']['bits_per_sample'] = self::audioBitDepthLookup($info['flv']['audio']['audioSampleSize']);
324
325 $info['audio']['channels'] = $info['flv']['audio']['audioType'] + 1; // 0=mono,1=stereo
326 $info['audio']['lossless'] = ($info['flv']['audio']['audioFormat'] ? false : true); // 0=uncompressed
327 $info['audio']['dataformat'] = 'flv';
328 }
329 if (!empty($info['flv']['header']['hasVideo'])) {
330 $info['video']['codec'] = self::videoCodecLookup($info['flv']['video']['videoCodec']);
331 $info['video']['dataformat'] = 'flv';
332 $info['video']['lossless'] = false;
333 }
334
335 // Set information from meta
336 if (!empty($info['flv']['meta']['onMetaData']['duration'])) {
337 $info['playtime_seconds'] = $info['flv']['meta']['onMetaData']['duration'];
338 $info['bitrate'] = (($info['avdataend'] - $info['avdataoffset']) * 8) / $info['playtime_seconds'];
339 }
340 if (isset($info['flv']['meta']['onMetaData']['audiocodecid'])) {
341 $info['audio']['codec'] = self::audioFormatLookup($info['flv']['meta']['onMetaData']['audiocodecid']);
342 }
343 if (isset($info['flv']['meta']['onMetaData']['videocodecid'])) {
344 $info['video']['codec'] = self::videoCodecLookup($info['flv']['meta']['onMetaData']['videocodecid']);
345 }
346 return true;
347 }
348
349 /**
350 * @param int $id
351 *
352 * @return string|false
353 */
354 public static function audioFormatLookup($id) {
355 static $lookup = array(
356 0 => 'Linear PCM, platform endian',
357 1 => 'ADPCM',
358 2 => 'mp3',
359 3 => 'Linear PCM, little endian',
360 4 => 'Nellymoser 16kHz mono',
361 5 => 'Nellymoser 8kHz mono',
362 6 => 'Nellymoser',
363 7 => 'G.711A-law logarithmic PCM',
364 8 => 'G.711 mu-law logarithmic PCM',
365 9 => 'reserved',
366 10 => 'AAC',
367 11 => 'Speex',
368 12 => false, // unknown?
369 13 => false, // unknown?
370 14 => 'mp3 8kHz',
371 15 => 'Device-specific sound',
372 );
373 return (isset($lookup[$id]) ? $lookup[$id] : false);
374 }
375
376 /**
377 * @param int $id
378 *
379 * @return int|false
380 */
381 public static function audioRateLookup($id) {
382 static $lookup = array(
383 0 => 5500,
384 1 => 11025,
385 2 => 22050,
386 3 => 44100,
387 );
388 return (isset($lookup[$id]) ? $lookup[$id] : false);
389 }
390
391 /**
392 * @param int $id
393 *
394 * @return int|false
395 */
396 public static function audioBitDepthLookup($id) {
397 static $lookup = array(
398 0 => 8,
399 1 => 16,
400 );
401 return (isset($lookup[$id]) ? $lookup[$id] : false);
402 }
403
404 /**
405 * @param int $id
406 *
407 * @return string|false
408 */
409 public static function videoCodecLookup($id) {
410 static $lookup = array(
411 GETID3_FLV_VIDEO_H263 => 'Sorenson H.263',
412 GETID3_FLV_VIDEO_SCREEN => 'Screen video',
413 GETID3_FLV_VIDEO_VP6FLV => 'On2 VP6',
414 GETID3_FLV_VIDEO_VP6FLV_ALPHA => 'On2 VP6 with alpha channel',
415 GETID3_FLV_VIDEO_SCREENV2 => 'Screen video v2',
416 GETID3_FLV_VIDEO_H264 => 'Sorenson H.264',
417 );
418 return (isset($lookup[$id]) ? $lookup[$id] : false);
419 }
420 }
421
422 class AMFStream
423 {
424 /**
425 * @var string
426 */
427 public $bytes;
428
429 /**
430 * @var int
431 */
432 public $pos;
433
434 /**
435 * @param string $bytes
436 */
437 public function __construct(&$bytes) {
438 $this->bytes =& $bytes;
439 $this->pos = 0;
440 }
441
442 /**
443 * @return int
444 */
445 public function readByte() { // 8-bit
446 return ord(substr($this->bytes, $this->pos++, 1));
447 }
448
449 /**
450 * @return int
451 */
452 public function readInt() { // 16-bit
453 return ($this->readByte() << 8) + $this->readByte();
454 }
455
456 /**
457 * @return int
458 */
459 public function readLong() { // 32-bit
460 return ($this->readByte() << 24) + ($this->readByte() << 16) + ($this->readByte() << 8) + $this->readByte();
461 }
462
463 /**
464 * @return float|false
465 */
466 public function readDouble() {
467 return getid3_lib::BigEndian2Float($this->read(8));
468 }
469
470 /**
471 * @return string
472 */
473 public function readUTF() {
474 $length = $this->readInt();
475 return $this->read($length);
476 }
477
478 /**
479 * @return string
480 */
481 public function readLongUTF() {
482 $length = $this->readLong();
483 return $this->read($length);
484 }
485
486 /**
487 * @param int $length
488 *
489 * @return string
490 */
491 public function read($length) {
492 $val = substr($this->bytes, $this->pos, $length);
493 $this->pos += $length;
494 return $val;
495 }
496
497 /**
498 * @return int
499 */
500 public function peekByte() {
501 $pos = $this->pos;
502 $val = $this->readByte();
503 $this->pos = $pos;
504 return $val;
505 }
506
507 /**
508 * @return int
509 */
510 public function peekInt() {
511 $pos = $this->pos;
512 $val = $this->readInt();
513 $this->pos = $pos;
514 return $val;
515 }
516
517 /**
518 * @return int
519 */
520 public function peekLong() {
521 $pos = $this->pos;
522 $val = $this->readLong();
523 $this->pos = $pos;
524 return $val;
525 }
526
527 /**
528 * @return float|false
529 */
530 public function peekDouble() {
531 $pos = $this->pos;
532 $val = $this->readDouble();
533 $this->pos = $pos;
534 return $val;
535 }
536
537 /**
538 * @return string
539 */
540 public function peekUTF() {
541 $pos = $this->pos;
542 $val = $this->readUTF();
543 $this->pos = $pos;
544 return $val;
545 }
546
547 /**
548 * @return string
549 */
550 public function peekLongUTF() {
551 $pos = $this->pos;
552 $val = $this->readLongUTF();
553 $this->pos = $pos;
554 return $val;
555 }
556 }
557
558 class AMFReader
559 {
560 /**
561 * @var AMFStream
562 */
563 public $stream;
564
565 /**
566 * @param AMFStream $stream
567 */
568 public function __construct(AMFStream $stream) {
569 $this->stream = $stream;
570 }
571
572 /**
573 * @return mixed
574 */
575 public function readData() {
576 $value = null;
577
578 $type = $this->stream->readByte();
579 switch ($type) {
580
581 // Double
582 case 0:
583 $value = $this->readDouble();
584 break;
585
586 // Boolean
587 case 1:
588 $value = $this->readBoolean();
589 break;
590
591 // String
592 case 2:
593 $value = $this->readString();
594 break;
595
596 // Object
597 case 3:
598 $value = $this->readObject();
599 break;
600
601 // null
602 case 6:
603 return null;
604
605 // Mixed array
606 case 8:
607 $value = $this->readMixedArray();
608 break;
609
610 // Array
611 case 10:
612 $value = $this->readArray();
613 break;
614
615 // Date
616 case 11:
617 $value = $this->readDate();
618 break;
619
620 // Long string
621 case 13:
622 $value = $this->readLongString();
623 break;
624
625 // XML (handled as string)
626 case 15:
627 $value = $this->readXML();
628 break;
629
630 // Typed object (handled as object)
631 case 16:
632 $value = $this->readTypedObject();
633 break;
634
635 // Long string
636 default:
637 $value = '(unknown or unsupported data type)';
638 break;
639 }
640
641 return $value;
642 }
643
644 /**
645 * @return float|false
646 */
647 public function readDouble() {
648 return $this->stream->readDouble();
649 }
650
651 /**
652 * @return bool
653 */
654 public function readBoolean() {
655 return $this->stream->readByte() == 1;
656 }
657
658 /**
659 * @return string
660 */
661 public function readString() {
662 return $this->stream->readUTF();
663 }
664
665 /**
666 * @return array
667 */
668 public function readObject() {
669 // Get highest numerical index - ignored
670 // $highestIndex = $this->stream->readLong();
671
672 $data = array();
673 $key = null;
674
675 while ($key = $this->stream->readUTF()) {
676 $data[$key] = $this->readData();
677 }
678 // Mixed array record ends with empty string (0x00 0x00) and 0x09
679 if (($key == '') && ($this->stream->peekByte() == 0x09)) {
680 // Consume byte
681 $this->stream->readByte();
682 }
683 return $data;
684 }
685
686 /**
687 * @return array
688 */
689 public function readMixedArray() {
690 // Get highest numerical index - ignored
691 $highestIndex = $this->stream->readLong();
692
693 $data = array();
694 $key = null;
695
696 while ($key = $this->stream->readUTF()) {
697 if (is_numeric($key)) {
698 $key = (int) $key;
699 }
700 $data[$key] = $this->readData();
701 }
702 // Mixed array record ends with empty string (0x00 0x00) and 0x09
703 if (($key == '') && ($this->stream->peekByte() == 0x09)) {
704 // Consume byte
705 $this->stream->readByte();
706 }
707
708 return $data;
709 }
710
711 /**
712 * @return array
713 */
714 public function readArray() {
715 $length = $this->stream->readLong();
716 $data = array();
717
718 for ($i = 0; $i < $length; $i++) {
719 $data[] = $this->readData();
720 }
721 return $data;
722 }
723
724 /**
725 * @return float|false
726 */
727 public function readDate() {
728 $timestamp = $this->stream->readDouble();
729 $timezone = $this->stream->readInt();
730 return $timestamp;
731 }
732
733 /**
734 * @return string
735 */
736 public function readLongString() {
737 return $this->stream->readLongUTF();
738 }
739
740 /**
741 * @return string
742 */
743 public function readXML() {
744 return $this->stream->readLongUTF();
745 }
746
747 /**
748 * @return array
749 */
750 public function readTypedObject() {
751 $className = $this->stream->readUTF();
752 return $this->readObject();
753 }
754 }
755
756 class AVCSequenceParameterSetReader
757 {
758 /**
759 * @var string
760 */
761 public $sps;
762 public $start = 0;
763 public $currentBytes = 0;
764 public $currentBits = 0;
765
766 /**
767 * @var int
768 */
769 public $width;
770
771 /**
772 * @var int
773 */
774 public $height;
775
776 /**
777 * @param string $sps
778 */
779 public function __construct($sps) {
780 $this->sps = $sps;
781 }
782
783 public function readData() {
784 $this->skipBits(8);
785 $this->skipBits(8);
786 $profile = $this->getBits(8); // read profile
787 if ($profile > 0) {
788 $this->skipBits(8);
789 $level_idc = $this->getBits(8); // level_idc
790 $this->expGolombUe(); // seq_parameter_set_id // sps
791 $this->expGolombUe(); // log2_max_frame_num_minus4
792 $picOrderType = $this->expGolombUe(); // pic_order_cnt_type
793 if ($picOrderType == 0) {
794 $this->expGolombUe(); // log2_max_pic_order_cnt_lsb_minus4
795 } elseif ($picOrderType == 1) {
796 $this->skipBits(1); // delta_pic_order_always_zero_flag
797 $this->expGolombSe(); // offset_for_non_ref_pic
798 $this->expGolombSe(); // offset_for_top_to_bottom_field
799 $num_ref_frames_in_pic_order_cnt_cycle = $this->expGolombUe(); // num_ref_frames_in_pic_order_cnt_cycle
800 for ($i = 0; $i < $num_ref_frames_in_pic_order_cnt_cycle; $i++) {
801 $this->expGolombSe(); // offset_for_ref_frame[ i ]
802 }
803 }
804 $this->expGolombUe(); // num_ref_frames
805 $this->skipBits(1); // gaps_in_frame_num_value_allowed_flag
806 $pic_width_in_mbs_minus1 = $this->expGolombUe(); // pic_width_in_mbs_minus1
807 $pic_height_in_map_units_minus1 = $this->expGolombUe(); // pic_height_in_map_units_minus1
808
809 $frame_mbs_only_flag = $this->getBits(1); // frame_mbs_only_flag
810 if ($frame_mbs_only_flag == 0) {
811 $this->skipBits(1); // mb_adaptive_frame_field_flag
812 }
813 $this->skipBits(1); // direct_8x8_inference_flag
814 $frame_cropping_flag = $this->getBits(1); // frame_cropping_flag
815
816 $frame_crop_left_offset = 0;
817 $frame_crop_right_offset = 0;
818 $frame_crop_top_offset = 0;
819 $frame_crop_bottom_offset = 0;
820
821 if ($frame_cropping_flag) {
822 $frame_crop_left_offset = $this->expGolombUe(); // frame_crop_left_offset
823 $frame_crop_right_offset = $this->expGolombUe(); // frame_crop_right_offset
824 $frame_crop_top_offset = $this->expGolombUe(); // frame_crop_top_offset
825 $frame_crop_bottom_offset = $this->expGolombUe(); // frame_crop_bottom_offset
826 }
827 $this->skipBits(1); // vui_parameters_present_flag
828 // etc
829
830 $this->width = (($pic_width_in_mbs_minus1 + 1) * 16) - ($frame_crop_left_offset * 2) - ($frame_crop_right_offset * 2);
831 $this->height = ((2 - $frame_mbs_only_flag) * ($pic_height_in_map_units_minus1 + 1) * 16) - ($frame_crop_top_offset * 2) - ($frame_crop_bottom_offset * 2);
832 }
833 }
834
835 /**
836 * @param int $bits
837 */
838 public function skipBits($bits) {
839 $newBits = $this->currentBits + $bits;
840 $this->currentBytes += (int)floor($newBits / 8);
841 $this->currentBits = $newBits % 8;
842 }
843
844 /**
845 * @return int
846 */
847 public function getBit() {
848 $result = (getid3_lib::BigEndian2Int(substr($this->sps, $this->currentBytes, 1)) >> (7 - $this->currentBits)) & 0x01;
849 $this->skipBits(1);
850 return $result;
851 }
852
853 /**
854 * @param int $bits
855 *
856 * @return int
857 */
858 public function getBits($bits) {
859 $result = 0;
860 for ($i = 0; $i < $bits; $i++) {
861 $result = ($result << 1) + $this->getBit();
862 }
863 return $result;
864 }
865
866 /**
867 * @return int
868 */
869 public function expGolombUe() {
870 $significantBits = 0;
871 $bit = $this->getBit();
872 while ($bit == 0) {
873 $significantBits++;
874 $bit = $this->getBit();
875
876 if ($significantBits > 31) {
877 // something is broken, this is an emergency escape to prevent infinite loops
878 return 0;
879 }
880 }
881 return (1 << $significantBits) + $this->getBits($significantBits) - 1;
882 }
883
884 /**
885 * @return int
886 */
887 public function expGolombSe() {
888 $result = $this->expGolombUe();
889 if (($result & 0x01) == 0) {
890 return -($result >> 1);
891 } else {
892 return ($result + 1) >> 1;
893 }
894 }
895
896 /**
897 * @return int
898 */
899 public function getWidth() {
900 return $this->width;
901 }
902
903 /**
904 * @return int
905 */
906 public function getHeight() {
907 return $this->height;
908 }
909 }
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