ILIAS  release_5-1 Revision 5.0.0-5477-g43f3e3fab5f
Public Member Functions | Data Fields
getid3_swf Class Reference

getID3() by James Heinrich info@.nosp@m.geti.nosp@m.d3.or.nosp@m.g // More...

+ Inheritance diagram for getid3_swf:
+ Collaboration diagram for getid3_swf:

Public Member Functions

 getid3_swf (&$fd, &$ThisFileInfo, $ReturnAllTagData=false)
 
 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)
 

Data Fields

 $ReturnAllTagData = false
 

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

getID3() by James Heinrich info@.nosp@m.geti.nosp@m.d3.or.nosp@m.g //

Definition at line 17 of file module.audio-video.swf.php.

Member Function Documentation

◆ Analyze()

getid3_swf::Analyze ( )

Definition at line 22 of file module.audio-video.swf.php.

References $info, getid3_lib\BigEndian2Int(), getid3_lib\Bin2Dec(), getid3_handler\fread(), getid3_handler\fseek(), getid3_lib\LittleEndian2Int(), and getid3_lib\PrintHexBytes().

22  {
23  $info = &$this->getid3->info;
24 
25  $info['fileformat'] = 'swf';
26  $info['video']['dataformat'] = 'swf';
27 
28  // http://www.openswf.org/spec/SWFfileformat.html
29 
30  $this->fseek($info['avdataoffset']);
31 
32  $SWFfileData = $this->fread($info['avdataend'] - $info['avdataoffset']); // 8 + 2 + 2 + max(9) bytes NOT including Frame_Size RECT data
33 
34  $info['swf']['header']['signature'] = substr($SWFfileData, 0, 3);
35  switch ($info['swf']['header']['signature']) {
36  case 'FWS':
37  $info['swf']['header']['compressed'] = false;
38  break;
39 
40  case 'CWS':
41  $info['swf']['header']['compressed'] = true;
42  break;
43 
44  default:
45  $info['error'][] = 'Expecting "FWS" or "CWS" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes($info['swf']['header']['signature']).'"';
46  unset($info['swf']);
47  unset($info['fileformat']);
48  return false;
49  break;
50  }
51  $info['swf']['header']['version'] = getid3_lib::LittleEndian2Int(substr($SWFfileData, 3, 1));
52  $info['swf']['header']['length'] = getid3_lib::LittleEndian2Int(substr($SWFfileData, 4, 4));
53 
54  if ($info['swf']['header']['compressed']) {
55  $SWFHead = substr($SWFfileData, 0, 8);
56  $SWFfileData = substr($SWFfileData, 8);
57  if ($decompressed = @gzuncompress($SWFfileData)) {
58  $SWFfileData = $SWFHead.$decompressed;
59  } else {
60  $info['error'][] = 'Error decompressing compressed SWF data ('.strlen($SWFfileData).' bytes compressed, should be '.($info['swf']['header']['length'] - 8).' bytes uncompressed)';
61  return false;
62  }
63  }
64 
65  $FrameSizeBitsPerValue = (ord(substr($SWFfileData, 8, 1)) & 0xF8) >> 3;
66  $FrameSizeDataLength = ceil((5 + (4 * $FrameSizeBitsPerValue)) / 8);
67  $FrameSizeDataString = str_pad(decbin(ord(substr($SWFfileData, 8, 1)) & 0x07), 3, '0', STR_PAD_LEFT);
68  for ($i = 1; $i < $FrameSizeDataLength; $i++) {
69  $FrameSizeDataString .= str_pad(decbin(ord(substr($SWFfileData, 8 + $i, 1))), 8, '0', STR_PAD_LEFT);
70  }
71  list($X1, $X2, $Y1, $Y2) = explode("\n", wordwrap($FrameSizeDataString, $FrameSizeBitsPerValue, "\n", 1));
72  $info['swf']['header']['frame_width'] = getid3_lib::Bin2Dec($X2);
73  $info['swf']['header']['frame_height'] = getid3_lib::Bin2Dec($Y2);
74 
75  // http://www-lehre.informatik.uni-osnabrueck.de/~fbstark/diplom/docs/swf/Flash_Uncovered.htm
76  // Next in the header is the frame rate, which is kind of weird.
77  // It is supposed to be stored as a 16bit integer, but the first byte
78  // (or last depending on how you look at it) is completely ignored.
79  // Example: 0x000C -> 0x0C -> 12 So the frame rate is 12 fps.
80 
81  // Byte at (8 + $FrameSizeDataLength) is always zero and ignored
82  $info['swf']['header']['frame_rate'] = getid3_lib::LittleEndian2Int(substr($SWFfileData, 9 + $FrameSizeDataLength, 1));
83  $info['swf']['header']['frame_count'] = getid3_lib::LittleEndian2Int(substr($SWFfileData, 10 + $FrameSizeDataLength, 2));
84 
85  $info['video']['frame_rate'] = $info['swf']['header']['frame_rate'];
86  $info['video']['resolution_x'] = intval(round($info['swf']['header']['frame_width'] / 20));
87  $info['video']['resolution_y'] = intval(round($info['swf']['header']['frame_height'] / 20));
88  $info['video']['pixel_aspect_ratio'] = (float) 1;
89 
90  if (($info['swf']['header']['frame_count'] > 0) && ($info['swf']['header']['frame_rate'] > 0)) {
91  $info['playtime_seconds'] = $info['swf']['header']['frame_count'] / $info['swf']['header']['frame_rate'];
92  }
93 //echo __LINE__.'='.number_format(microtime(true) - $start_time, 3).'<br>';
94 
95 
96  // SWF tags
97 
98  $CurrentOffset = 12 + $FrameSizeDataLength;
99  $SWFdataLength = strlen($SWFfileData);
100 
101  while ($CurrentOffset < $SWFdataLength) {
102 //echo __LINE__.'='.number_format(microtime(true) - $start_time, 3).'<br>';
103 
104  $TagIDTagLength = getid3_lib::LittleEndian2Int(substr($SWFfileData, $CurrentOffset, 2));
105  $TagID = ($TagIDTagLength & 0xFFFC) >> 6;
106  $TagLength = ($TagIDTagLength & 0x003F);
107  $CurrentOffset += 2;
108  if ($TagLength == 0x3F) {
109  $TagLength = getid3_lib::LittleEndian2Int(substr($SWFfileData, $CurrentOffset, 4));
110  $CurrentOffset += 4;
111  }
112 
113  unset($TagData);
114  $TagData['offset'] = $CurrentOffset;
115  $TagData['size'] = $TagLength;
116  $TagData['id'] = $TagID;
117  $TagData['data'] = substr($SWFfileData, $CurrentOffset, $TagLength);
118  switch ($TagID) {
119  case 0: // end of movie
120  break 2;
121 
122  case 9: // Set background color
123  //$info['swf']['tags'][] = $TagData;
124  $info['swf']['bgcolor'] = strtoupper(str_pad(dechex(getid3_lib::BigEndian2Int($TagData['data'])), 6, '0', STR_PAD_LEFT));
125  break;
126 
127  default:
128  if ($this->ReturnAllTagData) {
129  $info['swf']['tags'][] = $TagData;
130  }
131  break;
132  }
133 
134  $CurrentOffset += $TagLength;
135  }
136 
137  return true;
138  }
getid3_lib\Bin2Dec
Bin2Dec($binstring, $signed=false)
Definition: getid3.lib.php:316
getid3_lib\LittleEndian2Int
LittleEndian2Int($byteword, $signed=false)
Definition: getid3.lib.php:266
$info
$info
Definition: example_052.php:80
getid3_handler\fread
fread($bytes)
Definition: getid3.php:1685
getid3_lib\BigEndian2Int
BigEndian2Int($byteword, $synchsafe=false, $signed=false)
Definition: getid3.lib.php:234
getid3_handler\fseek
fseek($bytes, $whence=SEEK_SET)
Definition: getid3.php:1697
getid3_lib\PrintHexBytes
PrintHexBytes($string, $hex=true, $spaces=true, $htmlsafe=true)
Definition: getid3.lib.php:17
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◆ getid3_swf()

getid3_swf::getid3_swf ( &  $fd,
&  $ThisFileInfo,
  $ReturnAllTagData = false 
)

Definition at line 20 of file module.audio-video.swf.php.

References $ReturnAllTagData, getid3_lib\BigEndian2Int(), getid3_lib\Bin2Dec(), getid3_handler\fread(), getid3_handler\fseek(), and getid3_lib\LittleEndian2Int().

20  {
21  $ThisFileInfo['fileformat'] = 'swf';
22  $ThisFileInfo['video']['dataformat'] = 'swf';
23 
24  // http://www.openswf.org/spec/SWFfileformat.html
25 
26  fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET);
27 
28 //echo 'reading '.($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']).' bytes<br>';
29  $SWFfileData = fread($fd, $ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']); // 8 + 2 + 2 + max(9) bytes NOT including Frame_Size RECT data
30 
31  $ThisFileInfo['swf']['header']['signature'] = substr($SWFfileData, 0, 3);
32  switch ($ThisFileInfo['swf']['header']['signature']) {
33  case 'FWS':
34  $ThisFileInfo['swf']['header']['compressed'] = false;
35  break;
36 
37  case 'CWS':
38  $ThisFileInfo['swf']['header']['compressed'] = true;
39  break;
40 
41  default:
42  $ThisFileInfo['error'][] = 'Expecting "FWS" or "CWS" at offset '.$ThisFileInfo['avdataoffset'].', found "'.$ThisFileInfo['swf']['header']['signature'].'"';
43  unset($ThisFileInfo['swf']);
44  unset($ThisFileInfo['fileformat']);
45  return false;
46  break;
47  }
48  $ThisFileInfo['swf']['header']['version'] = getid3_lib::LittleEndian2Int(substr($SWFfileData, 3, 1));
49  $ThisFileInfo['swf']['header']['length'] = getid3_lib::LittleEndian2Int(substr($SWFfileData, 4, 4));
50 
51 //echo '1<br>';
52  if ($ThisFileInfo['swf']['header']['compressed']) {
53 
54 //echo '2<br>';
55 // $foo = substr($SWFfileData, 8, 4096);
56 // echo '['.strlen($foo).']<br>';
57 // $fee = gzuncompress($foo);
58 // echo '('.strlen($fee).')<br>';
59 //return false;
60 //echo '<br>time: '.time().'<br>';
61 //return false;
62  if ($UncompressedFileData = gzuncompress(substr($SWFfileData, 8))) {
63 
64 //echo '3<br>';
65  $SWFfileData = substr($SWFfileData, 0, 8).$UncompressedFileData;
66 
67  } else {
68 
69 //echo '4<br>';
70  $ThisFileInfo['error'][] = 'Error decompressing compressed SWF data';
71  return false;
72 
73  }
74 
75  }
76 
77  $FrameSizeBitsPerValue = (ord(substr($SWFfileData, 8, 1)) & 0xF8) >> 3;
78  $FrameSizeDataLength = ceil((5 + (4 * $FrameSizeBitsPerValue)) / 8);
79  $FrameSizeDataString = str_pad(decbin(ord(substr($SWFfileData, 8, 1)) & 0x07), 3, '0', STR_PAD_LEFT);
80  for ($i = 1; $i < $FrameSizeDataLength; $i++) {
81  $FrameSizeDataString .= str_pad(decbin(ord(substr($SWFfileData, 8 + $i, 1))), 8, '0', STR_PAD_LEFT);
82  }
83  list($X1, $X2, $Y1, $Y2) = explode("\n", wordwrap($FrameSizeDataString, $FrameSizeBitsPerValue, "\n", 1));
84  $ThisFileInfo['swf']['header']['frame_width'] = getid3_lib::Bin2Dec($X2);
85  $ThisFileInfo['swf']['header']['frame_height'] = getid3_lib::Bin2Dec($Y2);
86 
87  // http://www-lehre.informatik.uni-osnabrueck.de/~fbstark/diplom/docs/swf/Flash_Uncovered.htm
88  // Next in the header is the frame rate, which is kind of weird.
89  // It is supposed to be stored as a 16bit integer, but the first byte
90  // (or last depending on how you look at it) is completely ignored.
91  // Example: 0x000C -> 0x0C -> 12 So the frame rate is 12 fps.
92 
93  // Byte at (8 + $FrameSizeDataLength) is always zero and ignored
94  $ThisFileInfo['swf']['header']['frame_rate'] = getid3_lib::LittleEndian2Int(substr($SWFfileData, 9 + $FrameSizeDataLength, 1));
95  $ThisFileInfo['swf']['header']['frame_count'] = getid3_lib::LittleEndian2Int(substr($SWFfileData, 10 + $FrameSizeDataLength, 2));
96 
97  $ThisFileInfo['video']['frame_rate'] = $ThisFileInfo['swf']['header']['frame_rate'];
98  $ThisFileInfo['video']['resolution_x'] = intval(round($ThisFileInfo['swf']['header']['frame_width'] / 20));
99  $ThisFileInfo['video']['resolution_y'] = intval(round($ThisFileInfo['swf']['header']['frame_height'] / 20));
100  $ThisFileInfo['video']['pixel_aspect_ratio'] = (float) 1;
101 
102  if (($ThisFileInfo['swf']['header']['frame_count'] > 0) && ($ThisFileInfo['swf']['header']['frame_rate'] > 0)) {
103  $ThisFileInfo['playtime_seconds'] = $ThisFileInfo['swf']['header']['frame_count'] / $ThisFileInfo['swf']['header']['frame_rate'];
104  }
105 
106 
107  // SWF tags
108 
109  $CurrentOffset = 12 + $FrameSizeDataLength;
110  $SWFdataLength = strlen($SWFfileData);
111 
112  while ($CurrentOffset < $SWFdataLength) {
113 
114  $TagIDTagLength = getid3_lib::LittleEndian2Int(substr($SWFfileData, $CurrentOffset, 2));
115  $TagID = ($TagIDTagLength & 0xFFFC) >> 6;
116  $TagLength = ($TagIDTagLength & 0x003F);
117  $CurrentOffset += 2;
118  if ($TagLength == 0x3F) {
119  $TagLength = getid3_lib::LittleEndian2Int(substr($SWFfileData, $CurrentOffset, 4));
120  $CurrentOffset += 4;
121  }
122 
123  unset($TagData);
124  $TagData['offset'] = $CurrentOffset;
125  $TagData['size'] = $TagLength;
126  $TagData['id'] = $TagID;
127  $TagData['data'] = substr($SWFfileData, $CurrentOffset, $TagLength);
128  switch ($TagID) {
129  case 0: // end of movie
130  break 2;
131 
132  case 9: // Set background color
133  //$ThisFileInfo['swf']['tags'][] = $TagData;
134  $ThisFileInfo['swf']['bgcolor'] = strtoupper(str_pad(dechex(getid3_lib::BigEndian2Int($TagData['data'])), 6, '0', STR_PAD_LEFT));
135  break;
136 
137  default:
138  if ($ReturnAllTagData) {
139  $ThisFileInfo['swf']['tags'][] = $TagData;
140  }
141  break;
142  }
143 
144  $CurrentOffset += $TagLength;
145  }
146 
147  return true;
148  }
getid3_lib\Bin2Dec
Bin2Dec($binstring, $signed=false)
Definition: getid3.lib.php:316
getid3_lib\LittleEndian2Int
LittleEndian2Int($byteword, $signed=false)
Definition: getid3.lib.php:266
getid3_handler\fread
fread($bytes)
Definition: getid3.php:1685
getid3_swf\$ReturnAllTagData
$ReturnAllTagData
Definition: module.audio-video.swf.php:20
getid3_lib\BigEndian2Int
BigEndian2Int($byteword, $synchsafe=false, $signed=false)
Definition: getid3.lib.php:234
getid3_handler\fseek
fseek($bytes, $whence=SEEK_SET)
Definition: getid3.php:1697
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Field Documentation

◆ $ReturnAllTagData

getid3_swf::$ReturnAllTagData = false

Definition at line 20 of file module.audio-video.swf.php.

Referenced by getid3_swf().

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