ILIAS  release_5-4 Revision v5.4.26-12-gabc799a52e6
Public Member Functions | Static Public Member Functions | Data Fields
getid3_flv Class Reference
+ Inheritance diagram for getid3_flv:
+ Collaboration diagram for getid3_flv:

Public Member Functions

 Analyze ()
 
- Public Member Functions inherited from getid3_handler
 __construct (getID3 $getid3, $call_module=null)
 
 Analyze ()
 
 AnalyzeString ($string)
 
 setStringMode ($string)
 
 saveAttachment ($name, $offset, $length, $image_mime=null)
 

Static Public Member Functions

static audioFormatLookup ($id)
 
static audioRateLookup ($id)
 
static audioBitDepthLookup ($id)
 
static videoCodecLookup ($id)
 

Data Fields

const magic = 'FLV'
 
 $max_frames = 100000
 

Additional Inherited Members

- Protected Member Functions inherited from getid3_handler
 ftell ()
 
 fread ($bytes)
 
 fseek ($bytes, $whence=SEEK_SET)
 
 feof ()
 
 isDependencyFor ($module)
 
 error ($text)
 
 warning ($text)
 
 notice ($text)
 
- Protected Attributes inherited from getid3_handler
 $getid3
 
 $data_string_flag = false
 
 $data_string = ''
 
 $data_string_position = 0
 
 $data_string_length = 0
 

Detailed Description

Definition at line 76 of file module.audio-video.flv.php.

Member Function Documentation

◆ Analyze()

getid3_flv::Analyze ( )

Definition at line 82 of file module.audio-video.flv.php.

References $info, $reader, getid3_lib\BigEndian2Int(), getid3_lib\CastAsInt(), getid3_handler\error(), getid3_handler\fread(), getid3_handler\fseek(), getid3_handler\ftell(), GETID3_FLV_TAG_AUDIO, GETID3_FLV_TAG_META, GETID3_FLV_TAG_VIDEO, GETID3_FLV_VIDEO_H263, GETID3_FLV_VIDEO_H264, GETID3_FLV_VIDEO_VP6FLV_ALPHA, H264_AVC_SEQUENCE_HEADER, getid3_lib\LittleEndian2Int(), and getid3_lib\PrintHexBytes().

82  {
83  $info = &$this->getid3->info;
84 
85  $this->fseek($info['avdataoffset']);
86 
87  $FLVdataLength = $info['avdataend'] - $info['avdataoffset'];
88  $FLVheader = $this->fread(5);
89 
90  $info['fileformat'] = 'flv';
91  $info['flv']['header']['signature'] = substr($FLVheader, 0, 3);
92  $info['flv']['header']['version'] = getid3_lib::BigEndian2Int(substr($FLVheader, 3, 1));
93  $TypeFlags = getid3_lib::BigEndian2Int(substr($FLVheader, 4, 1));
94 
95  if ($info['flv']['header']['signature'] != self::magic) {
96  $this->error('Expecting "'.getid3_lib::PrintHexBytes(self::magic).'" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes($info['flv']['header']['signature']).'"');
97  unset($info['flv'], $info['fileformat']);
98  return false;
99  }
100 
101  $info['flv']['header']['hasAudio'] = (bool) ($TypeFlags & 0x04);
102  $info['flv']['header']['hasVideo'] = (bool) ($TypeFlags & 0x01);
103 
104  $FrameSizeDataLength = getid3_lib::BigEndian2Int($this->fread(4));
105  $FLVheaderFrameLength = 9;
106  if ($FrameSizeDataLength > $FLVheaderFrameLength) {
107  $this->fseek($FrameSizeDataLength - $FLVheaderFrameLength, SEEK_CUR);
108  }
109  $Duration = 0;
110  $found_video = false;
111  $found_audio = false;
112  $found_meta = false;
113  $found_valid_meta_playtime = false;
114  $tagParseCount = 0;
115  $info['flv']['framecount'] = array('total'=>0, 'audio'=>0, 'video'=>0);
116  $flv_framecount = &$info['flv']['framecount'];
117  while ((($this->ftell() + 16) < $info['avdataend']) && (($tagParseCount++ <= $this->max_frames) || !$found_valid_meta_playtime)) {
118  $ThisTagHeader = $this->fread(16);
119 
120  $PreviousTagLength = getid3_lib::BigEndian2Int(substr($ThisTagHeader, 0, 4));
121  $TagType = getid3_lib::BigEndian2Int(substr($ThisTagHeader, 4, 1));
122  $DataLength = getid3_lib::BigEndian2Int(substr($ThisTagHeader, 5, 3));
123  $Timestamp = getid3_lib::BigEndian2Int(substr($ThisTagHeader, 8, 3));
124  $LastHeaderByte = getid3_lib::BigEndian2Int(substr($ThisTagHeader, 15, 1));
125  $NextOffset = $this->ftell() - 1 + $DataLength;
126  if ($Timestamp > $Duration) {
127  $Duration = $Timestamp;
128  }
129 
130  $flv_framecount['total']++;
131  switch ($TagType) {
132  case GETID3_FLV_TAG_AUDIO:
133  $flv_framecount['audio']++;
134  if (!$found_audio) {
135  $found_audio = true;
136  $info['flv']['audio']['audioFormat'] = ($LastHeaderByte >> 4) & 0x0F;
137  $info['flv']['audio']['audioRate'] = ($LastHeaderByte >> 2) & 0x03;
138  $info['flv']['audio']['audioSampleSize'] = ($LastHeaderByte >> 1) & 0x01;
139  $info['flv']['audio']['audioType'] = $LastHeaderByte & 0x01;
140  }
141  break;
142 
143  case GETID3_FLV_TAG_VIDEO:
144  $flv_framecount['video']++;
145  if (!$found_video) {
146  $found_video = true;
147  $info['flv']['video']['videoCodec'] = $LastHeaderByte & 0x07;
148 
149  $FLVvideoHeader = $this->fread(11);
150 
151  if ($info['flv']['video']['videoCodec'] == GETID3_FLV_VIDEO_H264) {
152  // this code block contributed by: moysevichØgmail*com
153 
154  $AVCPacketType = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 0, 1));
155  if ($AVCPacketType == H264_AVC_SEQUENCE_HEADER) {
156  // read AVCDecoderConfigurationRecord
157  $configurationVersion = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 4, 1));
158  $AVCProfileIndication = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 5, 1));
159  $profile_compatibility = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 6, 1));
160  $lengthSizeMinusOne = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 7, 1));
161  $numOfSequenceParameterSets = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 8, 1));
162 
163  if (($numOfSequenceParameterSets & 0x1F) != 0) {
164  // there is at least one SequenceParameterSet
165  // read size of the first SequenceParameterSet
166  //$spsSize = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 9, 2));
167  $spsSize = getid3_lib::LittleEndian2Int(substr($FLVvideoHeader, 9, 2));
168  // read the first SequenceParameterSet
169  $sps = $this->fread($spsSize);
170  if (strlen($sps) == $spsSize) { // make sure that whole SequenceParameterSet was red
171  $spsReader = new AVCSequenceParameterSetReader($sps);
172  $spsReader->readData();
173  $info['video']['resolution_x'] = $spsReader->getWidth();
174  $info['video']['resolution_y'] = $spsReader->getHeight();
175  }
176  }
177  }
178  // end: moysevichØgmail*com
179 
180  } elseif ($info['flv']['video']['videoCodec'] == GETID3_FLV_VIDEO_H263) {
181 
182  $PictureSizeType = (getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 3, 2))) >> 7;
183  $PictureSizeType = $PictureSizeType & 0x0007;
184  $info['flv']['header']['videoSizeType'] = $PictureSizeType;
185  switch ($PictureSizeType) {
186  case 0:
187  //$PictureSizeEnc = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 5, 2));
188  //$PictureSizeEnc <<= 1;
189  //$info['video']['resolution_x'] = ($PictureSizeEnc & 0xFF00) >> 8;
190  //$PictureSizeEnc = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 6, 2));
191  //$PictureSizeEnc <<= 1;
192  //$info['video']['resolution_y'] = ($PictureSizeEnc & 0xFF00) >> 8;
193 
194  $PictureSizeEnc['x'] = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 4, 2)) >> 7;
195  $PictureSizeEnc['y'] = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 5, 2)) >> 7;
196  $info['video']['resolution_x'] = $PictureSizeEnc['x'] & 0xFF;
197  $info['video']['resolution_y'] = $PictureSizeEnc['y'] & 0xFF;
198  break;
199 
200  case 1:
201  $PictureSizeEnc['x'] = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 4, 3)) >> 7;
202  $PictureSizeEnc['y'] = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 6, 3)) >> 7;
203  $info['video']['resolution_x'] = $PictureSizeEnc['x'] & 0xFFFF;
204  $info['video']['resolution_y'] = $PictureSizeEnc['y'] & 0xFFFF;
205  break;
206 
207  case 2:
208  $info['video']['resolution_x'] = 352;
209  $info['video']['resolution_y'] = 288;
210  break;
211 
212  case 3:
213  $info['video']['resolution_x'] = 176;
214  $info['video']['resolution_y'] = 144;
215  break;
216 
217  case 4:
218  $info['video']['resolution_x'] = 128;
219  $info['video']['resolution_y'] = 96;
220  break;
221 
222  case 5:
223  $info['video']['resolution_x'] = 320;
224  $info['video']['resolution_y'] = 240;
225  break;
226 
227  case 6:
228  $info['video']['resolution_x'] = 160;
229  $info['video']['resolution_y'] = 120;
230  break;
231 
232  default:
233  $info['video']['resolution_x'] = 0;
234  $info['video']['resolution_y'] = 0;
235  break;
236 
237  }
238 
239  } elseif ($info['flv']['video']['videoCodec'] == GETID3_FLV_VIDEO_VP6FLV_ALPHA) {
240 
241  /* contributed by schouwerwouØgmail*com */
242  if (!isset($info['video']['resolution_x'])) { // only when meta data isn't set
243  $PictureSizeEnc['x'] = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 6, 2));
244  $PictureSizeEnc['y'] = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 7, 2));
245  $info['video']['resolution_x'] = ($PictureSizeEnc['x'] & 0xFF) << 3;
246  $info['video']['resolution_y'] = ($PictureSizeEnc['y'] & 0xFF) << 3;
247  }
248  /* end schouwerwouØgmail*com */
249 
250  }
251  if (!empty($info['video']['resolution_x']) && !empty($info['video']['resolution_y'])) {
252  $info['video']['pixel_aspect_ratio'] = $info['video']['resolution_x'] / $info['video']['resolution_y'];
253  }
254  }
255  break;
256 
257  // Meta tag
258  case GETID3_FLV_TAG_META:
259  if (!$found_meta) {
260  $found_meta = true;
261  $this->fseek(-1, SEEK_CUR);
262  $datachunk = $this->fread($DataLength);
263  $AMFstream = new AMFStream($datachunk);
264  $reader = new AMFReader($AMFstream);
265  $eventName = $reader->readData();
266  $info['flv']['meta'][$eventName] = $reader->readData();
267  unset($reader);
268 
269  $copykeys = array('framerate'=>'frame_rate', 'width'=>'resolution_x', 'height'=>'resolution_y', 'audiodatarate'=>'bitrate', 'videodatarate'=>'bitrate');
270  foreach ($copykeys as $sourcekey => $destkey) {
271  if (isset($info['flv']['meta']['onMetaData'][$sourcekey])) {
272  switch ($sourcekey) {
273  case 'width':
274  case 'height':
275  $info['video'][$destkey] = intval(round($info['flv']['meta']['onMetaData'][$sourcekey]));
276  break;
277  case 'audiodatarate':
278  $info['audio'][$destkey] = getid3_lib::CastAsInt(round($info['flv']['meta']['onMetaData'][$sourcekey] * 1000));
279  break;
280  case 'videodatarate':
281  case 'frame_rate':
282  default:
283  $info['video'][$destkey] = $info['flv']['meta']['onMetaData'][$sourcekey];
284  break;
285  }
286  }
287  }
288  if (!empty($info['flv']['meta']['onMetaData']['duration'])) {
289  $found_valid_meta_playtime = true;
290  }
291  }
292  break;
293 
294  default:
295  // noop
296  break;
297  }
298  $this->fseek($NextOffset);
299  }
300 
301  $info['playtime_seconds'] = $Duration / 1000;
302  if ($info['playtime_seconds'] > 0) {
303  $info['bitrate'] = (($info['avdataend'] - $info['avdataoffset']) * 8) / $info['playtime_seconds'];
304  }
305 
306  if ($info['flv']['header']['hasAudio']) {
307  $info['audio']['codec'] = self::audioFormatLookup($info['flv']['audio']['audioFormat']);
308  $info['audio']['sample_rate'] = self::audioRateLookup($info['flv']['audio']['audioRate']);
309  $info['audio']['bits_per_sample'] = self::audioBitDepthLookup($info['flv']['audio']['audioSampleSize']);
310 
311  $info['audio']['channels'] = $info['flv']['audio']['audioType'] + 1; // 0=mono,1=stereo
312  $info['audio']['lossless'] = ($info['flv']['audio']['audioFormat'] ? false : true); // 0=uncompressed
313  $info['audio']['dataformat'] = 'flv';
314  }
315  if (!empty($info['flv']['header']['hasVideo'])) {
316  $info['video']['codec'] = self::videoCodecLookup($info['flv']['video']['videoCodec']);
317  $info['video']['dataformat'] = 'flv';
318  $info['video']['lossless'] = false;
319  }
320 
321  // Set information from meta
322  if (!empty($info['flv']['meta']['onMetaData']['duration'])) {
323  $info['playtime_seconds'] = $info['flv']['meta']['onMetaData']['duration'];
324  $info['bitrate'] = (($info['avdataend'] - $info['avdataoffset']) * 8) / $info['playtime_seconds'];
325  }
326  if (isset($info['flv']['meta']['onMetaData']['audiocodecid'])) {
327  $info['audio']['codec'] = self::audioFormatLookup($info['flv']['meta']['onMetaData']['audiocodecid']);
328  }
329  if (isset($info['flv']['meta']['onMetaData']['videocodecid'])) {
330  $info['video']['codec'] = self::videoCodecLookup($info['flv']['meta']['onMetaData']['videocodecid']);
331  }
332  return true;
333  }
GETID3_FLV_TAG_VIDEO
const GETID3_FLV_TAG_VIDEO
Definition: module.audio-video.flv.php:56
GETID3_FLV_TAG_META
const GETID3_FLV_TAG_META
Definition: module.audio-video.flv.php:57
getid3_handler\error
error($text)
Definition: getid3.php:1752
GETID3_FLV_TAG_AUDIO
const GETID3_FLV_TAG_AUDIO
getID3() by James Heinrich info@getid3.org //
Definition: module.audio-video.flv.php:55
getid3_lib\LittleEndian2Int
static LittleEndian2Int($byteword, $signed=false)
Definition: getid3.lib.php:292
GETID3_FLV_VIDEO_VP6FLV_ALPHA
const GETID3_FLV_VIDEO_VP6FLV_ALPHA
Definition: module.audio-video.flv.php:62
GETID3_FLV_VIDEO_H264
const GETID3_FLV_VIDEO_H264
Definition: module.audio-video.flv.php:64
getid3_lib\CastAsInt
static CastAsInt($floatnum)
Definition: getid3.lib.php:65
getid3_lib\PrintHexBytes
static PrintHexBytes($string, $hex=true, $spaces=true, $htmlencoding='UTF-8')
Definition: getid3.lib.php:18
getid3_handler\fread
fread($bytes)
Definition: getid3.php:1683
H264_AVC_SEQUENCE_HEADER
const H264_AVC_SEQUENCE_HEADER
Definition: module.audio-video.flv.php:66
getid3_handler\fseek
fseek($bytes, $whence=SEEK_SET)
Definition: getid3.php:1711
$info
$info
Definition: index.php:5
getid3_handler\ftell
ftell()
Definition: getid3.php:1676
getid3_lib\BigEndian2Int
static BigEndian2Int($byteword, $synchsafe=false, $signed=false)
Definition: getid3.lib.php:263
GETID3_FLV_VIDEO_H263
const GETID3_FLV_VIDEO_H263
Definition: module.audio-video.flv.php:59
+ Here is the call graph for this function:

◆ audioBitDepthLookup()

static getid3_flv::audioBitDepthLookup (   $id)
static

Definition at line 368 of file module.audio-video.flv.php.

References $id.

368  {
369  static $lookup = array(
370  0 => 8,
371  1 => 16,
372  );
373  return (isset($lookup[$id]) ? $lookup[$id] : false);
374  }
$id
if(!array_key_exists('StateId', $_REQUEST)) $id
Definition: expirywarning.php:14

◆ audioFormatLookup()

static getid3_flv::audioFormatLookup (   $id)
static

Definition at line 336 of file module.audio-video.flv.php.

References $id.

336  {
337  static $lookup = array(
338  0 => 'Linear PCM, platform endian',
339  1 => 'ADPCM',
340  2 => 'mp3',
341  3 => 'Linear PCM, little endian',
342  4 => 'Nellymoser 16kHz mono',
343  5 => 'Nellymoser 8kHz mono',
344  6 => 'Nellymoser',
345  7 => 'G.711A-law logarithmic PCM',
346  8 => 'G.711 mu-law logarithmic PCM',
347  9 => 'reserved',
348  10 => 'AAC',
349  11 => 'Speex',
350  12 => false, // unknown?
351  13 => false, // unknown?
352  14 => 'mp3 8kHz',
353  15 => 'Device-specific sound',
354  );
355  return (isset($lookup[$id]) ? $lookup[$id] : false);
356  }
$id
if(!array_key_exists('StateId', $_REQUEST)) $id
Definition: expirywarning.php:14

◆ audioRateLookup()

static getid3_flv::audioRateLookup (   $id)
static

Definition at line 358 of file module.audio-video.flv.php.

References $id.

358  {
359  static $lookup = array(
360  0 => 5500,
361  1 => 11025,
362  2 => 22050,
363  3 => 44100,
364  );
365  return (isset($lookup[$id]) ? $lookup[$id] : false);
366  }
$id
if(!array_key_exists('StateId', $_REQUEST)) $id
Definition: expirywarning.php:14

◆ videoCodecLookup()

static getid3_flv::videoCodecLookup (   $id)
static

Definition at line 376 of file module.audio-video.flv.php.

References $id, GETID3_FLV_VIDEO_H263, GETID3_FLV_VIDEO_H264, GETID3_FLV_VIDEO_SCREEN, GETID3_FLV_VIDEO_SCREENV2, GETID3_FLV_VIDEO_VP6FLV, and GETID3_FLV_VIDEO_VP6FLV_ALPHA.

376  {
377  static $lookup = array(
378  GETID3_FLV_VIDEO_H263 => 'Sorenson H.263',
379  GETID3_FLV_VIDEO_SCREEN => 'Screen video',
380  GETID3_FLV_VIDEO_VP6FLV => 'On2 VP6',
381  GETID3_FLV_VIDEO_VP6FLV_ALPHA => 'On2 VP6 with alpha channel',
382  GETID3_FLV_VIDEO_SCREENV2 => 'Screen video v2',
383  GETID3_FLV_VIDEO_H264 => 'Sorenson H.264',
384  );
385  return (isset($lookup[$id]) ? $lookup[$id] : false);
386  }
$id
if(!array_key_exists('StateId', $_REQUEST)) $id
Definition: expirywarning.php:14
GETID3_FLV_VIDEO_VP6FLV_ALPHA
const GETID3_FLV_VIDEO_VP6FLV_ALPHA
Definition: module.audio-video.flv.php:62
GETID3_FLV_VIDEO_SCREEN
const GETID3_FLV_VIDEO_SCREEN
Definition: module.audio-video.flv.php:60
GETID3_FLV_VIDEO_H264
const GETID3_FLV_VIDEO_H264
Definition: module.audio-video.flv.php:64
GETID3_FLV_VIDEO_SCREENV2
const GETID3_FLV_VIDEO_SCREENV2
Definition: module.audio-video.flv.php:63
GETID3_FLV_VIDEO_VP6FLV
const GETID3_FLV_VIDEO_VP6FLV
Definition: module.audio-video.flv.php:61
GETID3_FLV_VIDEO_H263
const GETID3_FLV_VIDEO_H263
Definition: module.audio-video.flv.php:59

Field Documentation

◆ $max_frames

getid3_flv::$max_frames = 100000

Definition at line 80 of file module.audio-video.flv.php.

◆ magic

const getid3_flv::magic = 'FLV'

Definition at line 78 of file module.audio-video.flv.php.

The documentation for this class was generated from the following file: