ILIAS  release_5-0 Revision 5.0.0-1144-gc4397b1f870
Public Member Functions
getid3_flv Class Reference
+ Collaboration diagram for getid3_flv:

Public Member Functions

 getid3_flv (&$fd, &$ThisFileInfo, $ReturnAllTagData=false)
 
 FLVaudioFormat ($id)
 
 FLVaudioRate ($id)
 
 FLVaudioBitDepth ($id)
 
 FLVvideoCodec ($id)
 

Detailed Description

Definition at line 38 of file module.audio-video.flv.php.

Member Function Documentation

◆ FLVaudioBitDepth()

getid3_flv::FLVaudioBitDepth (   $id)

Definition at line 230 of file module.audio-video.flv.php.

230 {
231 $FLVaudioBitDepth = array(
232 0 => 8,
233 1 => 16,
234 );
235 return (@$FLVaudioBitDepth[$id] ? @$FLVaudioBitDepth[$id] : false);
236 }

Referenced by getid3_flv().

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◆ FLVaudioFormat()

getid3_flv::FLVaudioFormat (   $id)

Definition at line 209 of file module.audio-video.flv.php.

209 {
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 }

Referenced by getid3_flv().

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◆ FLVaudioRate()

getid3_flv::FLVaudioRate (   $id)

Definition at line 220 of file module.audio-video.flv.php.

220 {
221 $FLVaudioRate = array(
222 0 => 5500,
223 1 => 11025,
224 2 => 22050,
225 3 => 44100,
226 );
227 return (@$FLVaudioRate[$id] ? @$FLVaudioRate[$id] : false);
228 }

Referenced by getid3_flv().

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◆ FLVvideoCodec()

getid3_flv::FLVvideoCodec (   $id)

Definition at line 238 of file module.audio-video.flv.php.

238 {
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 }
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_VIDEO_VP6
const GETID3_FLV_VIDEO_VP6
Definition: module.audio-video.flv.php:36

References GETID3_FLV_VIDEO_H263, GETID3_FLV_VIDEO_SCREEN, and GETID3_FLV_VIDEO_VP6.

Referenced by getid3_flv().

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◆ getid3_flv()

getid3_flv::getid3_flv ( &  $fd,
&  $ThisFileInfo,
  $ReturnAllTagData = false 
)

Definition at line 41 of file module.audio-video.flv.php.

41 {
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 $ThisFileInfo['video']['lossless'] = false;
203 }
204
205 return true;
206 }
getid3_flv\FLVaudioFormat
FLVaudioFormat($id)
Definition: module.audio-video.flv.php:209
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($id)
Definition: module.audio-video.flv.php:220
getid3_lib\BigEndian2Int
BigEndian2Int($byteword, $synchsafe=false, $signed=false)
Definition: getid3.lib.php:234
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_TAG_META
const GETID3_FLV_TAG_META
Definition: module.audio-video.flv.php:32

References $reader, getid3_lib\BigEndian2Int(), FLVaudioBitDepth(), FLVaudioFormat(), FLVaudioRate(), FLVvideoCodec(), GETID3_FLV_TAG_AUDIO, GETID3_FLV_TAG_META, GETID3_FLV_TAG_VIDEO, and GETID3_FLV_VIDEO_VP6.

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