ILIAS  release_5-1 Revision 5.0.0-5477-g43f3e3fab5f
module.audio-video.flv.php
Go to the documentation of this file.
1<?php
4// available at http://getid3.sourceforge.net //
5// or http://www.getid3.org //
6// //
7// FLV module by Seth Kaufman <seth@whirl-i-gig.com> //
8// //
9// * version 0.1 (26 June 2005) //
10// //
11// minor modifications by James Heinrich <info@getid3.org> //
12// * version 0.1.1 (15 July 2005) //
13// //
14// Support for On2 VP6 codec and meta information by //
15// Steve Webster <steve.webster@featurecreep.com> //
16// * version 0.2 (22 February 2006) //
17// //
18// Modified to not read entire file into memory //
19// by James Heinrich <info@getid3.org> //
20// * version 0.3 (15 June 2006) //
21// //
23// //
24// module.audio-video.flv.php //
25// module for analyzing Shockwave Flash Video files //
26// dependencies: NONE //
27// ///
29
30define('GETID3_FLV_TAG_AUDIO', 8);
31define('GETID3_FLV_TAG_VIDEO', 9);
32define('GETID3_FLV_TAG_META', 18);
33
34define('GETID3_FLV_VIDEO_H263', 2);
35define('GETID3_FLV_VIDEO_SCREEN', 3);
36define('GETID3_FLV_VIDEO_VP6', 4);
37
38class getid3_flv
39{
40
41 function getid3_flv(&$fd, &$ThisFileInfo, $ReturnAllTagData=false) {
42 fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET);
43
44 $FLVdataLength = $ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset'];
45 $FLVheader = fread($fd, 5);
46
47 $ThisFileInfo['fileformat'] = 'flv';
48 $ThisFileInfo['flv']['header']['signature'] = substr($FLVheader, 0, 3);
49 $ThisFileInfo['flv']['header']['version'] = getid3_lib::BigEndian2Int(substr($FLVheader, 3, 1));
50 $TypeFlags = getid3_lib::BigEndian2Int(substr($FLVheader, 4, 1));
51
52 if ($ThisFileInfo['flv']['header']['signature'] != 'FLV') {
53 $ThisFileInfo['error'][] = 'Expecting "FLV" at offset '.$ThisFileInfo['avdataoffset'].', found "'.$ThisFileInfo['flv']['header']['signature'].'"';
54 unset($ThisFileInfo['flv']);
55 unset($ThisFileInfo['fileformat']);
56 return false;
57 }
58
59 $ThisFileInfo['flv']['header']['hasAudio'] = (bool) ($TypeFlags & 0x04);
60 $ThisFileInfo['flv']['header']['hasVideo'] = (bool) ($TypeFlags & 0x01);
61
62 $FrameSizeDataLength = getid3_lib::BigEndian2Int(fread($fd, 4));
63 $FLVheaderFrameLength = 9;
64 if ($FrameSizeDataLength > $FLVheaderFrameLength) {
65 fseek($fd, $FrameSizeDataLength - $FLVheaderFrameLength, SEEK_CUR);
66 }
67
68 $Duration = 0;
69 while ((ftell($fd) + 1) < $ThisFileInfo['avdataend']) {
70 //if (!$ThisFileInfo['flv']['header']['hasAudio'] || isset($ThisFileInfo['flv']['audio']['audioFormat'])) {
71 // if (!$ThisFileInfo['flv']['header']['hasVideo'] || isset($ThisFileInfo['flv']['video']['videoCodec'])) {
72 // break;
73 // }
74 //}
75
76 $ThisTagHeader = fread($fd, 16);
77
78 $PreviousTagLength = getid3_lib::BigEndian2Int(substr($ThisTagHeader, 0, 4));
79 $TagType = getid3_lib::BigEndian2Int(substr($ThisTagHeader, 4, 1));
80 $DataLength = getid3_lib::BigEndian2Int(substr($ThisTagHeader, 5, 3));
81 $Timestamp = getid3_lib::BigEndian2Int(substr($ThisTagHeader, 8, 3));
82 $LastHeaderByte = getid3_lib::BigEndian2Int(substr($ThisTagHeader, 15, 1));
83 $NextOffset = ftell($fd) - 1 + $DataLength;
84
85 switch ($TagType) {
86 case GETID3_FLV_TAG_AUDIO:
87 if (!isset($ThisFileInfo['flv']['audio']['audioFormat'])) {
88 $ThisFileInfo['flv']['audio']['audioFormat'] = $LastHeaderByte & 0x07;
89 $ThisFileInfo['flv']['audio']['audioRate'] = ($LastHeaderByte & 0x30) / 0x10;
90 $ThisFileInfo['flv']['audio']['audioSampleSize'] = ($LastHeaderByte & 0x40) / 0x40;
91 $ThisFileInfo['flv']['audio']['audioType'] = ($LastHeaderByte & 0x80) / 0x80;
92 }
93 break;
94
95 case GETID3_FLV_TAG_VIDEO:
96 if (!isset($ThisFileInfo['flv']['video']['videoCodec'])) {
97 $ThisFileInfo['flv']['video']['videoCodec'] = $LastHeaderByte & 0x07;
98
99 $FLVvideoHeader = fread($fd, 11);
100
101 if ($ThisFileInfo['flv']['video']['videoCodec'] != GETID3_FLV_VIDEO_VP6) {
102
103 $PictureSizeType = (getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 3, 2))) >> 7;
104 $PictureSizeType = $PictureSizeType & 0x0007;
105 $ThisFileInfo['flv']['header']['videoSizeType'] = $PictureSizeType;
106 switch ($PictureSizeType) {
107 case 0:
108 $PictureSizeEnc = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 5, 2));
109 $PictureSizeEnc <<= 1;
110 $ThisFileInfo['video']['resolution_x'] = ($PictureSizeEnc & 0xFF00) >> 8;
111 $PictureSizeEnc = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 6, 2));
112 $PictureSizeEnc <<= 1;
113 $ThisFileInfo['video']['resolution_y'] = ($PictureSizeEnc & 0xFF00) >> 8;
114 break;
115
116 case 1:
117 $PictureSizeEnc = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 5, 4));
118 $PictureSizeEnc <<= 1;
119 $ThisFileInfo['video']['resolution_x'] = ($PictureSizeEnc & 0xFFFF0000) >> 16;
120
121 $PictureSizeEnc = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 7, 4));
122 $PictureSizeEnc <<= 1;
123 $ThisFileInfo['video']['resolution_y'] = ($PictureSizeEnc & 0xFFFF0000) >> 16;
124 break;
125
126 case 2:
127 $ThisFileInfo['video']['resolution_x'] = 352;
128 $ThisFileInfo['video']['resolution_y'] = 288;
129 break;
130
131 case 3:
132 $ThisFileInfo['video']['resolution_x'] = 176;
133 $ThisFileInfo['video']['resolution_y'] = 144;
134 break;
135
136 case 4:
137 $ThisFileInfo['video']['resolution_x'] = 128;
138 $ThisFileInfo['video']['resolution_y'] = 96;
139 break;
140
141 case 5:
142 $ThisFileInfo['video']['resolution_x'] = 320;
143 $ThisFileInfo['video']['resolution_y'] = 240;
144 break;
145
146 case 6:
147 $ThisFileInfo['video']['resolution_x'] = 160;
148 $ThisFileInfo['video']['resolution_y'] = 120;
149 break;
150
151 default:
152 $ThisFileInfo['video']['resolution_x'] = 0;
153 $ThisFileInfo['video']['resolution_y'] = 0;
154 break;
155
156 }
157 }
158 }
159 break;
160
161 // Meta tag
162 case GETID3_FLV_TAG_META:
163
164 fseek($fd, -1, SEEK_CUR);
165 $reader = new AMFReader(new AMFStream(fread($fd, $DataLength)));
166 $eventName = $reader->readData();
167 $ThisFileInfo['meta'][$eventName] = $reader->readData();
168 unset($reader);
169
170 $ThisFileInfo['video']['frame_rate'] = $ThisFileInfo['meta']['onMetaData']['framerate'];
171 $ThisFileInfo['video']['resolution_x'] = $ThisFileInfo['meta']['onMetaData']['width'];
172 $ThisFileInfo['video']['resolution_y'] = $ThisFileInfo['meta']['onMetaData']['height'];
173 break;
174
175 default:
176 // noop
177 break;
178 }
179
180 if ($Timestamp > $Duration) {
181 $Duration = $Timestamp;
182 }
183
184 fseek($fd, $NextOffset, SEEK_SET);
185 }
186
187 $ThisFileInfo['playtime_seconds'] = $Duration / 1000;
188 $ThisFileInfo['bitrate'] = ($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) / $ThisFileInfo['playtime_seconds'];
189
190 if ($ThisFileInfo['flv']['header']['hasAudio']) {
191 $ThisFileInfo['audio']['codec'] = $this->FLVaudioFormat($ThisFileInfo['flv']['audio']['audioFormat']);
192 $ThisFileInfo['audio']['sample_rate'] = $this->FLVaudioRate($ThisFileInfo['flv']['audio']['audioRate']);
193 $ThisFileInfo['audio']['bits_per_sample'] = $this->FLVaudioBitDepth($ThisFileInfo['flv']['audio']['audioSampleSize']);
194
195 $ThisFileInfo['audio']['channels'] = $ThisFileInfo['flv']['audio']['audioType'] + 1; // 0=mono,1=stereo
196 $ThisFileInfo['audio']['lossless'] = ($ThisFileInfo['flv']['audio']['audioFormat'] ? false : true); // 0=uncompressed
197 $ThisFileInfo['audio']['dataformat'] = 'flv';
198 }
199 if (@$ThisFileInfo['flv']['header']['hasVideo']) {
200 $ThisFileInfo['video']['codec'] = $this->FLVvideoCodec($ThisFileInfo['flv']['video']['videoCodec']);
201 $ThisFileInfo['video']['dataformat'] = 'flv';
202 $ThisFileInfo['video']['lossless'] = false;
203 }
204
205 return true;
206 }
207
208
209 function FLVaudioFormat($id) {
210 $FLVaudioFormat = array(
211 0 => 'uncompressed',
212 1 => 'ADPCM',
213 2 => 'mp3',
214 5 => 'Nellymoser 8kHz mono',
215 6 => 'Nellymoser',
216 );
217 return (@$FLVaudioFormat[$id] ? @$FLVaudioFormat[$id] : false);
218 }
219
220 function FLVaudioRate($id) {
221 $FLVaudioRate = array(
222 0 => 5500,
223 1 => 11025,
224 2 => 22050,
225 3 => 44100,
226 );
227 return (@$FLVaudioRate[$id] ? @$FLVaudioRate[$id] : false);
228 }
229
230 function FLVaudioBitDepth($id) {
231 $FLVaudioBitDepth = array(
232 0 => 8,
233 1 => 16,
234 );
235 return (@$FLVaudioBitDepth[$id] ? @$FLVaudioBitDepth[$id] : false);
236 }
237
238 function FLVvideoCodec($id) {
239 $FLVvideoCodec = array(
240 GETID3_FLV_VIDEO_H263 => 'Sorenson H.263',
241 GETID3_FLV_VIDEO_SCREEN => 'Screen video',
242 GETID3_FLV_VIDEO_VP6 => 'On2 VP6',
243 );
244 return (@$FLVvideoCodec[$id] ? @$FLVvideoCodec[$id] : false);
245 }
246}
247
248class AMFStream {
249 var $bytes;
250 var $pos;
251
252 function AMFStream(&$bytes) {
253 $this->bytes =& $bytes;
254 $this->pos = 0;
255 }
256
257 function readByte() {
258 return getid3_lib::BigEndian2Int(substr($this->bytes, $this->pos++, 1));
259 }
260
261 function readInt() {
262 return ($this->readByte() << 8) + $this->readByte();
263 }
264
265 function readLong() {
266 return ($this->readByte() << 24) + ($this->readByte() << 16) + ($this->readByte() << 8) + $this->readByte();
267 }
268
269 function readDouble() {
270 return getid3_lib::BigEndian2Float($this->read(8));
271 }
272
273 function readUTF() {
274 $length = $this->readInt();
275 return $this->read($length);
276 }
277
278 function readLongUTF() {
279 $length = $this->readLong();
280 return $this->read($length);
281 }
282
283 function read($length) {
284 $val = substr($this->bytes, $this->pos, $length);
285 $this->pos += $length;
286 return $val;
287 }
288
289 function peekByte() {
290 $pos = $this->pos;
291 $val = $this->readByte();
292 $this->pos = $pos;
293 return $val;
294 }
295
296 function peekInt() {
297 $pos = $this->pos;
298 $val = $this->readInt();
299 $this->pos = $pos;
300 return $val;
301 }
302
303 function peekLong() {
304 $pos = $this->pos;
305 $val = $this->readLong();
306 $this->pos = $pos;
307 return $val;
308 }
309
310 function peekDouble() {
311 $pos = $this->pos;
312 $val = $this->readDouble();
313 $this->pos = $pos;
314 return $val;
315 }
316
317 function peekUTF() {
318 $pos = $this->pos;
319 $val = $this->readUTF();
320 $this->pos = $pos;
321 return $val;
322 }
323
324 function peekLongUTF() {
325 $pos = $this->pos;
326 $val = $this->readLongUTF();
327 $this->pos = $pos;
328 return $val;
329 }
330}
331
332class AMFReader {
333 var $stream;
334
335 function AMFReader(&$stream) {
336 $this->stream =& $stream;
337 }
338
339 function readData() {
340 $value = null;
341
342 $type = $this->stream->readByte();
343
344 switch($type) {
345 // Double
346 case 0:
347 $value = $this->readDouble();
348 break;
349
350 // Boolean
351 case 1:
352 $value = $this->readBoolean();
353 break;
354
355 // String
356 case 2:
357 $value = $this->readString();
358 break;
359
360 // Object
361 case 3:
362 $value = $this->readObject();
363 break;
364
365 // null
366 case 6:
367 return null;
368 break;
369
370 // Mixed array
371 case 8:
372 $value = $this->readMixedArray();
373 break;
374
375 // Array
376 case 10:
377 $value = $this->readArray();
378 break;
379
380 // Date
381 case 11:
382 $value = $this->readDate();
383 break;
384
385 // Long string
386 case 13:
387 $value = $this->readLongString();
388 break;
389
390 // XML (handled as string)
391 case 15:
392 $value = $this->readXML();
393 break;
394
395 // Typed object (handled as object)
396 case 16:
397 $value = $this->readTypedObject();
398 break;
399
400 // Long string
401 default:
402 $value = '(unknown or unsupported data type)';
403 break;
404 }
405
406 return $value;
407 }
408
409 function readDouble() {
410 return $this->stream->readDouble();
411 }
412
413 function readBoolean() {
414 return $this->stream->readByte() == 1;
415 }
416
417 function readString() {
418 return $this->stream->readUTF();
419 }
420
421 function readObject() {
422 // Get highest numerical index - ignored
423 $highestIndex = $this->stream->readLong();
424
425 $data = array();
426
427 while ($key = $this->stream->readUTF()) {
428 // Mixed array record ends with empty string (0x00 0x00) and 0x09
429 if (($key == '') && ($this->stream->peekByte() == 0x09)) {
430 // Consume byte
431 $this->stream->readByte();
432 break;
433 }
434
435 $data[$key] = $this->readData();
436 }
437
438 return $data;
439 }
440
441 function readMixedArray() {
442 // Get highest numerical index - ignored
443 $highestIndex = $this->stream->readLong();
444
445 $data = array();
446
447 while ($key = $this->stream->readUTF()) {
448 // Mixed array record ends with empty string (0x00 0x00) and 0x09
449 if (($key == '') && ($this->stream->peekByte() == 0x09)) {
450 // Consume byte
451 $this->stream->readByte();
452 break;
453 }
454
455 if (is_numeric($key)) {
456 $key = (float) $key;
457 }
458
459 $data[$key] = $this->readData();
460 }
461
462 return $data;
463 }
464
465 function readArray() {
466 $length = $this->stream->readLong();
467
468 $data = array();
469
470 for ($i = 0; $i < count($length); $i++) {
471 $data[] = $this->readData();
472 }
473
474 return $data;
475 }
476
477 function readDate() {
478 $timestamp = $this->stream->readDouble();
479 $timezone = $this->stream->readInt();
480 return $timestamp;
481 }
482
483 function readLongString() {
484 return $this->stream->readLongUTF();
485 }
486
487 function readXML() {
488 return $this->stream->readLongUTF();
489 }
490
491 function readTypedObject() {
492 $className = $this->stream->readUTF();
493 return $this->readObject();
494 }
495}
496
497?>
$timestamp
foreach($mandatory_scripts as $file) $timestamp
Definition: buildRTE.php:81
getid3_flv
Definition: module.audio-video.flv.php:39
getid3_flv\FLVaudioFormat
FLVaudioFormat($id)
Definition: module.audio-video.flv.php:209
getid3_flv\getid3_flv
getid3_flv(&$fd, &$ThisFileInfo, $ReturnAllTagData=false)
Definition: module.audio-video.flv.php:41
getid3_flv\FLVvideoCodec
FLVvideoCodec($id)
Definition: module.audio-video.flv.php:238
getid3_flv\FLVaudioBitDepth
FLVaudioBitDepth($id)
Definition: module.audio-video.flv.php:230
getid3_flv\FLVaudioRate
FLVaudioRate($id)
Definition: module.audio-video.flv.php:220
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_lib\BigEndian2Float
BigEndian2Float($byteword)
Definition: getid3.lib.php:159
getid3_lib\BigEndian2Int
BigEndian2Int($byteword, $synchsafe=false, $signed=false)
Definition: getid3.lib.php:234
$data
$data
Definition: example_011.php:126
GETID3_FLV_TAG_AUDIO
const GETID3_FLV_TAG_AUDIO
getID3() by James Heinrich info@getid3.org //
Definition: module.audio-video.flv.php:30
GETID3_FLV_TAG_VIDEO
const GETID3_FLV_TAG_VIDEO
Definition: module.audio-video.flv.php:31
GETID3_FLV_VIDEO_H263
const GETID3_FLV_VIDEO_H263
Definition: module.audio-video.flv.php:34
GETID3_FLV_VIDEO_SCREEN
const GETID3_FLV_VIDEO_SCREEN
Definition: module.audio-video.flv.php:35
GETID3_FLV_TAG_META
const GETID3_FLV_TAG_META
Definition: module.audio-video.flv.php:32
GETID3_FLV_VIDEO_VP6
const GETID3_FLV_VIDEO_VP6
Definition: module.audio-video.flv.php:36