| Index: branches/MetavidWiki-exp/MetavidWiki/skins/mv_embed/flvServer/MvFlv.php |
| — | — | @@ -1,240 +0,0 @@ |
| 2 | | -<?php |
| 3 | | -include_once 'FLV/FLV.php'; |
| 4 | | - |
| 5 | | -define('MAX_FLV_TS', 16777.216);//it appears tag times restart after 16777.216 seconds; |
| 6 | | -define('KEY_FRAME_DISTANCE', 2); //max keyframe distance |
| 7 | | - |
| 8 | | -define('META_DATA_EXT', '.meta'); //file extension for cached Time metadata |
| 9 | | - |
| 10 | | - class MvFLV extends FLV { |
| 11 | | - |
| 12 | | - /** |
| 13 | | - * On audio-only files the frame index will use this as minimum gap |
| 14 | | - */ |
| 15 | | - private $audioFrameGap = 3; |
| 16 | | - |
| 17 | | - private $origMetaOfs = 0; |
| 18 | | - private $origMetaSize = 0; |
| 19 | | - private $origMetaData; |
| 20 | | - private $compMetaData; |
| 21 | | - |
| 22 | | - private $wrapTimeCount = 0; |
| 23 | | - |
| 24 | | - |
| 25 | | - function playTimeReq($start_time_sec, $end_time_sec=null){ |
| 26 | | - |
| 27 | | - //@@todo cache byte offsets in memcache if avaliable |
| 28 | | - $this->getMetaData(); |
| 29 | | - $meta = & $this->compMetaData['keyframes']; |
| 30 | | - |
| 31 | | - $start_byte=$end_byte=null; |
| 32 | | - if($start_time_sec==0 && $end_time_sec==null)$this->play(); |
| 33 | | - for($i=0;$i<count($meta['times']);$i++){ |
| 34 | | - //set to the keyframe right before a keyframe of the requested start time |
| 35 | | - if($meta['times'][$i]>=$start_time_sec && $start_byte==null){ |
| 36 | | - $start_byte=(isset($meta['times'][$i-1]))?$meta['filepositions'][$i-1]:$meta['filepositions'][$i]; |
| 37 | | - if($end_time_sec==null)break; |
| 38 | | - } |
| 39 | | - //set to the keyframe right after the keyframe of the end time: |
| 40 | | - if($end_time_sec!=null){ |
| 41 | | - if($meta['times'][$i]>=$end_time_sec)$end_byte= $meta['filepositions'][$i]; |
| 42 | | - } |
| 43 | | - } |
| 44 | | - $this->play($start_byte, $end_byte); |
| 45 | | - } |
| 46 | | - function getMetaData() |
| 47 | | - { |
| 48 | | - if (! is_array($this->origMetaData)) |
| 49 | | - return $this->compMetaData; |
| 50 | | - else |
| 51 | | - return array_merge( $this->origMetaData, $this->compMetaData ); |
| 52 | | - } |
| 53 | | - /*function getMetaData() |
| 54 | | - { |
| 55 | | - if(is_file($this->fname . META_DATA_EXT)){ |
| 56 | | - $this->compMetaData = unserialize(file_get_contents ($this->fname . META_DATA_EXT)); |
| 57 | | - }else{ |
| 58 | | - $this->computeMetaData(); |
| 59 | | - if(!file_put_contents($this->fname . META_DATA_EXT, serialize($this->compMetaData))){ |
| 60 | | - throw( new FLV_FileException('Unable to write out cached keyframe output') ); |
| 61 | | - } |
| 62 | | - } |
| 63 | | - return $this->compMetaData; |
| 64 | | - }*/ |
| 65 | | - function computeMetaData() |
| 66 | | - { |
| 67 | | - ini_set("max_execution_time","0");//computeMetaData can take some time |
| 68 | | - $this->compMetaData = array(); |
| 69 | | - $this->compMetaData['metadatacreator'] = 'FLV Tools for PHP v0.1 by DrSlump'; |
| 70 | | - $this->compMetaData['metadatadate'] = gmdate('Y-m-d\TH:i:s') . '.000Z'; |
| 71 | | - $this->compMetaData['keyframes'] = array(); |
| 72 | | - $this->compMetaData['keyframes']['filepositions'] = array(); |
| 73 | | - $this->compMetaData['keyframes']['times'] = array(); |
| 74 | | - |
| 75 | | - $this->origMetaOfs = 0; |
| 76 | | - $this->origMetaSize = 0; |
| 77 | | - $this->origMetaData = null; |
| 78 | | - $skipTagTypes = array(); |
| 79 | | - while ($tag = $this->getTag( $skipTagTypes )) |
| 80 | | - { |
| 81 | | - // pre-calculate the timestamp as seconds |
| 82 | | - $ts = $tag->timestamp/1000; |
| 83 | | - if ($tag->timestamp > 0 && $tag->type==FLV_Tag::TYPE_VIDEO ){ |
| 84 | | - $ts = (MAX_FLV_TS*$this->wrapTimeCount) + $ts; |
| 85 | | - if($ts < $this->compMetaData['lasttimestamp']){ |
| 86 | | - $this->wrapTimeCount++; |
| 87 | | - $ts = MAX_FLV_TS + $ts; |
| 88 | | - } |
| 89 | | - //print "set end time to $ts \n"; |
| 90 | | - $this->compMetaData['lasttimestamp'] = $ts; |
| 91 | | - } |
| 92 | | - |
| 93 | | - switch ($tag->type) |
| 94 | | - { |
| 95 | | - case FLV_Tag::TYPE_VIDEO : |
| 96 | | - |
| 97 | | - //Optimization, extract the frametype without analyzing the tag body |
| 98 | | - if ((ord($tag->body[0]) >> 4) == FLV_Tag_Video::FRAME_KEYFRAME) |
| 99 | | - { |
| 100 | | - $this->compMetaData['keyframes']['filepositions'][] = $this->getTagOffset(); |
| 101 | | - $this->compMetaData['keyframes']['times'][] = $ts; |
| 102 | | - } |
| 103 | | - |
| 104 | | - if ( !in_array(FLV_TAG::TYPE_VIDEO, $skipTagTypes) ) |
| 105 | | - { |
| 106 | | - $this->compMetaData['width'] = $tag->width; |
| 107 | | - $this->compMetaData['height'] = $tag->height; |
| 108 | | - $this->compMetaData['videocodecid'] = $tag->codec; |
| 109 | | - //Processing one video tag is enough |
| 110 | | - array_push( $skipTagTypes, FLV_Tag::TYPE_VIDEO ); |
| 111 | | - } |
| 112 | | - |
| 113 | | - break; |
| 114 | | - |
| 115 | | - case FLV_Tag::TYPE_AUDIO : |
| 116 | | - |
| 117 | | - //Save audio frame positions when there is no video |
| 118 | | - if (!$flv->hasVideo && $ts - $oldTs > $this->audioFrameGap) |
| 119 | | - { |
| 120 | | - $this->compMetaData['keyframes']['filepositions'][] = $this->getTagOffset(); |
| 121 | | - $this->compMetaData['keyframes']['times'][] = $ts; |
| 122 | | - $oldTs = $ts; |
| 123 | | - } |
| 124 | | - |
| 125 | | - if ( !in_array( FLV_Tag::TYPE_AUDIO, $skipTagTypes) ) |
| 126 | | - { |
| 127 | | - $this->compMetaData['audiocodecid'] = $tag->codec; |
| 128 | | - $this->compMetaData['audiofreqid'] = $tag->frequency; |
| 129 | | - $this->compMetaData['audiodepthid'] = $tag->depth; |
| 130 | | - $this->compMetaData['audiomodeid'] = $tag->mode; |
| 131 | | - |
| 132 | | - //Processing one audio tag is enough |
| 133 | | - array_push( $skipTagTypes, FLV_Tag::TYPE_AUDIO ); |
| 134 | | - } |
| 135 | | - |
| 136 | | - break; |
| 137 | | - |
| 138 | | - case FLV_Tag::TYPE_DATA : |
| 139 | | - if ($tag->name == 'onMetaData') |
| 140 | | - { |
| 141 | | - $this->origMetaOfs = $this->getTagOffset(); |
| 142 | | - $this->origMetaSize = $tag->size + self::TAG_HEADER_SIZE; |
| 143 | | - $this->origMetaData = $tag->value; |
| 144 | | - } |
| 145 | | - break; |
| 146 | | - } |
| 147 | | - |
| 148 | | - //Does this actually help with memory allocation? |
| 149 | | - unset($tag); |
| 150 | | - } |
| 151 | | - |
| 152 | | - if (! empty($this->compMetaData['keyframes']['times'])) |
| 153 | | - $this->compMetaData['lastkeyframetimestamp'] = $this->compMetaData['keyframes']['times'][ count($this->compMetaData['keyframes']['times'])-1 ]; |
| 154 | | - |
| 155 | | - $this->compMetaData['duration'] = $this->compMetaData['lasttimestamp']; |
| 156 | | - |
| 157 | | - return $this->compMetaData; |
| 158 | | - } |
| 159 | | - |
| 160 | | - function setMetaData( $metadata, $origMetaOfs = 0, $origMetaSize = 0 ) |
| 161 | | - { |
| 162 | | - $this->compMetaData = $metadata; |
| 163 | | - $this->origMetaOfs = $origMetaOfs; |
| 164 | | - $this->origMetaSize = $origMetaSize; |
| 165 | | - } |
| 166 | | - |
| 167 | | - |
| 168 | | - function play( $from = 0, $play_to=null ) |
| 169 | | - { |
| 170 | | - print "play $from to $play_to "; |
| 171 | | - die; |
| 172 | | - fseek($this->fp, 0); |
| 173 | | - |
| 174 | | - // get original file header just in case it has any special flag |
| 175 | | - echo fread($this->fp, $this->bodyOfs + 4); |
| 176 | | - |
| 177 | | - // output the metadata if available |
| 178 | | - $meta = $this->getMetaData(); |
| 179 | | - if (! empty($meta)) |
| 180 | | - { |
| 181 | | - //serialize the metadata as an AMF stream |
| 182 | | - include_once 'FLV/Util/AMFSerialize.php'; |
| 183 | | - $amf = new FLV_Util_AMFSerialize(); |
| 184 | | - |
| 185 | | - $serMeta = $amf->serialize('onMetaData'); |
| 186 | | - $serMeta.= $amf->serialize($meta); |
| 187 | | - |
| 188 | | - //Data tag mark |
| 189 | | - $out = pack('C', FLV_Tag::TYPE_DATA); |
| 190 | | - //Size of the data tag (BUG: limited to 64Kb) |
| 191 | | - $out.= pack('Cn', 0, strlen($serMeta)); |
| 192 | | - //Timestamp |
| 193 | | - $out.= pack('N', 0); |
| 194 | | - //StreamID |
| 195 | | - $out.= pack('Cn', 0, 0); |
| 196 | | - |
| 197 | | - echo $out; |
| 198 | | - echo $serMeta; |
| 199 | | - |
| 200 | | - // PrevTagSize for the metadata |
| 201 | | - echo pack('N', strlen($serMeta) + strlen($out) ); |
| 202 | | - } |
| 203 | | - |
| 204 | | - $chunkSize = 4096; |
| 205 | | - $skippedOrigMeta = empty($this->origMetaSize); |
| 206 | | - //seek to offset point: |
| 207 | | - fseek($this->fp, $from); |
| 208 | | - while (! feof($this->fp)) |
| 209 | | - { |
| 210 | | - // if the original metadata is pressent and not yet skipped... |
| 211 | | - if (! $skippedOrigMeta) |
| 212 | | - { |
| 213 | | - $pos = ftell($this->fp); |
| 214 | | - |
| 215 | | - // check if we are going to output it in this loop step |
| 216 | | - if ( $pos <= $this->origMetaOfs && |
| 217 | | - $pos + $chunkSize > $this->origMetaOfs ) |
| 218 | | - { |
| 219 | | - // output the bytes just before the original metadata tag |
| 220 | | - if ($this->origMetaOfs - $pos > 0) |
| 221 | | - echo fread($this->fp, $this->origMetaOfs - $pos); |
| 222 | | - |
| 223 | | - // position the file pointer just after the metadata tag |
| 224 | | - fseek($this->fp, $this->origMetaOfs + $this->origMetaSize); |
| 225 | | - |
| 226 | | - $skippedOrigMeta = true; |
| 227 | | - continue; |
| 228 | | - } |
| 229 | | - } |
| 230 | | - if($play_to!=null){ |
| 231 | | - if(ftell($this->fp)+$chunkSize > $play_to){ |
| 232 | | - $read_amount = (ftell($this->fp)+$chunkSize)-$play_to; |
| 233 | | - echo fread($this->fp, $read_amount); |
| 234 | | - break; |
| 235 | | - } |
| 236 | | - } |
| 237 | | - echo fread($this->fp, $chunkSize); |
| 238 | | - } |
| 239 | | - } |
| 240 | | -} |
| 241 | | -?> |
| Index: branches/MetavidWiki-exp/MetavidWiki/skins/mv_embed/flvServer/mvFlvServer.php |
| — | — | @@ -50,16 +50,28 @@ |
| 51 | 51 | //print "DO: $start_sec $end_sec \n"; |
| 52 | 52 | require_once('MvFlv.php'); |
| 53 | 53 | //open up the metavid Flv object: |
| 54 | | - $flv = new MvFLV(); |
| | 54 | + /*$flv = new MvFLV(); |
| 55 | 55 | try { |
| 56 | 56 | $flv->open( $file_loc ); |
| 57 | 57 | } catch (Exception $e) { |
| 58 | 58 | die("<pre>The following exception was detected while trying to open a FLV file:\n" . $e->getMessage() . "</pre>"); |
| 59 | 59 | } |
| 60 | | - //header('Content-type: '.FLASH_VIDEO_CONTENT_TYPE); |
| | 60 | + header('Content-type: '.FLASH_VIDEO_CONTENT_TYPE); |
| 61 | 61 | $flv->playTimeReq($start_sec, $end_sec); |
| 62 | 62 | //print_r($flv->computeMetaData() ); |
| 63 | 63 | $flv->close(); |
| | 64 | + */ |
| | 65 | + $flv = new MyFLV(); |
| | 66 | + try { |
| | 67 | + $flv->open( $file_loc ); |
| | 68 | + } catch (Exception $e) { |
| | 69 | + die("<pre>The following exception was detected while trying to open a FLV file:\n" . $e->getMessage() . "</pre>"); |
| | 70 | + } |
| | 71 | + header('Content-type: '.FLASH_VIDEO_CONTENT_TYPE); |
| | 72 | + //$flv->play(331630, 647659); |
| | 73 | + $flv->playTimeReq($start_sec, $end_sec); |
| | 74 | + $flv->close(); |
| | 75 | + |
| 64 | 76 | } |
| 65 | 77 | |
| 66 | 78 | |
| Index: branches/MetavidWiki-exp/MetavidWiki/skins/mv_embed/flvServer/README |
| — | — | @@ -1,5 +1,3 @@ |
| 2 | | -==mv_embed helper scripts== |
| | 2 | +==flvServer== |
| 3 | 3 | |
| 4 | | -These are the mv_embed helper scripts. |
| 5 | | - |
| 6 | | -@@todo document |
| \ No newline at end of file |
| | 4 | +enables the serving of flv video segments. |
| \ No newline at end of file |
| Index: branches/MetavidWiki-exp/MetavidWiki/skins/mv_embed/flvServer/MvFlv_old.php |
| — | — | @@ -0,0 +1,251 @@ |
| | 2 | +<?php |
| | 3 | +include_once 'FLV/FLV.php'; |
| | 4 | + |
| | 5 | +define('MAX_FLV_TS', 16777.216);//it appears tag times restart after 16777.216 seconds; |
| | 6 | +define('KEY_FRAME_DISTANCE', 2); //max keyframe distance |
| | 7 | + |
| | 8 | +define('META_DATA_EXT', '.KfMeta'); //file extension for cached Time metadata |
| | 9 | + |
| | 10 | + class MvFLV extends FLV { |
| | 11 | + |
| | 12 | + /** |
| | 13 | + * On audio-only files the frame index will use this as minimum gap |
| | 14 | + */ |
| | 15 | + private $audioFrameGap = 3; |
| | 16 | + |
| | 17 | + private $origMetaOfs = 0; |
| | 18 | + private $origMetaSize = 0; |
| | 19 | + private $origMetaData; |
| | 20 | + private $compMetaData; |
| | 21 | + |
| | 22 | + private $wrapTimeCount = 0; |
| | 23 | + private $kfMeta=array(); |
| | 24 | + |
| | 25 | + private $metaDuration=0; |
| | 26 | + |
| | 27 | + function playTimeReq($start_time_sec, $end_time_sec=null){ |
| | 28 | + //print "play $start_time_sec to $end_time_sec"; |
| | 29 | + //@@todo cache byte offsets in memcache if avaliable |
| | 30 | + if( $end_time_sec) |
| | 31 | + $this->metaDuration = $end_time_sec - $start_time_sec; |
| | 32 | + //print "SET metaDuration to: " . $this->metaDuration . "\n"; |
| | 33 | + $meta = & $this->getKfMetaData(); |
| | 34 | + $start_byte=$end_byte=null; |
| | 35 | + if($start_time_sec==0 && $end_time_sec==null)$this->play(); |
| | 36 | + $start_time_ms = $start_time_sec*1000; |
| | 37 | + $end_time_ms = ($end_time_sec==null)?null:$end_time_sec*1000; |
| | 38 | + |
| | 39 | + for($i=0;$i<count($meta['times']);$i++){ |
| | 40 | + //set to the keyframe right before a keyframe of the requested start time |
| | 41 | + if($meta['times'][$i]>=$start_time_ms && $start_byte==null){ |
| | 42 | + $start_byte=(isset($meta['times'][$i-1]))?$meta['filepositions'][$i-1]:$meta['filepositions'][$i]; |
| | 43 | + if($end_time_ms==null)break; |
| | 44 | + } |
| | 45 | + //set to the keyframe right after the keyframe of the end time: |
| | 46 | + if($end_time_ms!=null){ |
| | 47 | + if($meta['times'][$i]>=$end_time_ms)$end_byte= $meta['filepositions'][$i]; |
| | 48 | + } |
| | 49 | + } |
| | 50 | + //print " bytes: $start_byte $end_byte "; |
| | 51 | + $this->play($start_byte, $end_byte); |
| | 52 | + } |
| | 53 | + function getMetaData() |
| | 54 | + { |
| | 55 | + if (! is_array($this->origMetaData)) |
| | 56 | + return $this->compMetaData; |
| | 57 | + else |
| | 58 | + return array_merge( $this->origMetaData, $this->compMetaData ); |
| | 59 | + } |
| | 60 | + function getKfMetaData() |
| | 61 | + { |
| | 62 | + if(is_file($this->fname . META_DATA_EXT)){ |
| | 63 | + $this->kfMeta = unserialize(file_get_contents ($this->fname . META_DATA_EXT)); |
| | 64 | + }else{ |
| | 65 | + $this->computeMetaData(); |
| | 66 | + //store keframe data as int (takes less time to parse/open/search) |
| | 67 | + foreach($this->compMetaData['keyframes']['times'] as $inx=>&$ts){ |
| | 68 | + $ts = (int)($ts*1000); |
| | 69 | + } |
| | 70 | + if(!file_put_contents($this->fname . META_DATA_EXT, serialize($this->compMetaData['keyframes']))){ |
| | 71 | + throw( new FLV_FileException('Unable to write out cached keyframe output') ); |
| | 72 | + } |
| | 73 | + } |
| | 74 | + return $this->kfMeta; |
| | 75 | + } |
| | 76 | + function computeMetaData() |
| | 77 | + { |
| | 78 | + ini_set("max_execution_time","0");//computeMetaData can take some time |
| | 79 | + $this->compMetaData = array(); |
| | 80 | + $this->compMetaData['metadatacreator'] = 'FLV Tools'; |
| | 81 | + $this->compMetaData['metadatadate'] = gmdate('Y-m-d\TH:i:s') . '.000Z'; |
| | 82 | + $this->compMetaData['keyframes'] = array(); |
| | 83 | + $this->compMetaData['keyframes']['filepositions'] = array(); |
| | 84 | + $this->compMetaData['keyframes']['times'] = array(); |
| | 85 | + |
| | 86 | + $this->origMetaOfs = 0; |
| | 87 | + $this->origMetaSize = 0; |
| | 88 | + $this->origMetaData = null; |
| | 89 | + $skipTagTypes = array(); |
| | 90 | + while ($tag = $this->getTag( $skipTagTypes )) |
| | 91 | + { |
| | 92 | + // pre-calculate the timestamp as seconds |
| | 93 | + $ts = $tag->timestamp/1000; |
| | 94 | + if ($tag->timestamp > 0 && $tag->type==FLV_Tag::TYPE_VIDEO ){ |
| | 95 | + $ts = (MAX_FLV_TS*$this->wrapTimeCount) + $ts; |
| | 96 | + if($ts < $this->compMetaData['lasttimestamp']){ |
| | 97 | + $this->wrapTimeCount++; |
| | 98 | + $ts = MAX_FLV_TS + $ts; |
| | 99 | + } |
| | 100 | + //print "set end time to $ts \n"; |
| | 101 | + $this->compMetaData['lasttimestamp'] = $ts; |
| | 102 | + } |
| | 103 | + switch ($tag->type) |
| | 104 | + { |
| | 105 | + case FLV_Tag::TYPE_VIDEO : |
| | 106 | + |
| | 107 | + //Optimization, extract the frametype without analyzing the tag body |
| | 108 | + if ((ord($tag->body[0]) >> 4) == FLV_Tag_Video::FRAME_KEYFRAME) |
| | 109 | + { |
| | 110 | + $this->compMetaData['keyframes']['filepositions'][] = $this->getTagOffset(); |
| | 111 | + $this->compMetaData['keyframes']['times'][] = $ts; |
| | 112 | + } |
| | 113 | + |
| | 114 | + if ( !in_array(FLV_TAG::TYPE_VIDEO, $skipTagTypes) ) |
| | 115 | + { |
| | 116 | + $this->compMetaData['width'] = $tag->width; |
| | 117 | + $this->compMetaData['height'] = $tag->height; |
| | 118 | + $this->compMetaData['videocodecid'] = $tag->codec; |
| | 119 | + //Processing one video tag is enough |
| | 120 | + array_push( $skipTagTypes, FLV_Tag::TYPE_VIDEO ); |
| | 121 | + } |
| | 122 | + |
| | 123 | + break; |
| | 124 | + case FLV_Tag::TYPE_AUDIO : |
| | 125 | + //Save audio frame positions when there is no video |
| | 126 | + if (!$flv->hasVideo && $ts - $oldTs > $this->audioFrameGap) |
| | 127 | + { |
| | 128 | + $this->compMetaData['keyframes']['filepositions'][] = $this->getTagOffset(); |
| | 129 | + $this->compMetaData['keyframes']['times'][] = $ts; |
| | 130 | + $oldTs = $ts; |
| | 131 | + } |
| | 132 | + |
| | 133 | + if ( !in_array( FLV_Tag::TYPE_AUDIO, $skipTagTypes) ) |
| | 134 | + { |
| | 135 | + $this->compMetaData['audiocodecid'] = $tag->codec; |
| | 136 | + $this->compMetaData['audiofreqid'] = $tag->frequency; |
| | 137 | + $this->compMetaData['audiodepthid'] = $tag->depth; |
| | 138 | + $this->compMetaData['audiomodeid'] = $tag->mode; |
| | 139 | + |
| | 140 | + //Processing one audio tag is enough |
| | 141 | + array_push( $skipTagTypes, FLV_Tag::TYPE_AUDIO ); |
| | 142 | + } |
| | 143 | + |
| | 144 | + break; |
| | 145 | + |
| | 146 | + case FLV_Tag::TYPE_DATA : |
| | 147 | + if ($tag->name == 'onMetaData') |
| | 148 | + { |
| | 149 | + $this->origMetaOfs = $this->getTagOffset(); |
| | 150 | + $this->origMetaSize = $tag->size + self::TAG_HEADER_SIZE; |
| | 151 | + $this->origMetaData = $tag->value; |
| | 152 | + } |
| | 153 | + break; |
| | 154 | + } |
| | 155 | + |
| | 156 | + //Does this actually help with memory allocation? |
| | 157 | + unset($tag); |
| | 158 | + } |
| | 159 | + if (! empty($this->compMetaData['keyframes']['times'])) |
| | 160 | + $this->compMetaData['lastkeyframetimestamp'] = $this->compMetaData['keyframes']['times'][ count($this->compMetaData['keyframes']['times'])-1 ]; |
| | 161 | + |
| | 162 | + $this->compMetaData['duration'] = $this->compMetaData['lasttimestamp']; |
| | 163 | + |
| | 164 | + |
| | 165 | + return $this->compMetaData; |
| | 166 | + } |
| | 167 | + |
| | 168 | + function setMetaData( $metadata, $origMetaOfs = 0, $origMetaSize = 0 ) |
| | 169 | + { |
| | 170 | + $this->compMetaData = $metadata; |
| | 171 | + $this->origMetaOfs = $origMetaOfs; |
| | 172 | + $this->origMetaSize = $origMetaSize; |
| | 173 | + } |
| | 174 | + |
| | 175 | + |
| | 176 | + function play( $from = 0, $play_to=null ) |
| | 177 | + { |
| | 178 | + // output the metadata if available |
| | 179 | + $this->computeMetaData(); |
| | 180 | + $meta = $this->getMetaData(); |
| | 181 | + //print "META:"; |
| | 182 | + //print_r($meta); |
| | 183 | + //die; |
| | 184 | + |
| | 185 | + fseek($this->fp, 0); |
| | 186 | + // get original file header just in case it has any special flag |
| | 187 | + echo fread($this->fp, $this->bodyOfs + 4); |
| | 188 | + |
| | 189 | + //ignore the "ture" metadata and make a simple metadata packet: |
| | 190 | + if (! empty($meta)) |
| | 191 | + { |
| | 192 | + //serialize the metadata as an AMF stream |
| | 193 | + include_once 'FLV/Util/AMFSerialize.php'; |
| | 194 | + $amf = new FLV_Util_AMFSerialize(); |
| | 195 | + |
| | 196 | + $serMeta = $amf->serialize('onMetaData'); |
| | 197 | + $serMeta.= $amf->serialize($meta); |
| | 198 | + |
| | 199 | + //Data tag mark |
| | 200 | + $out = pack('C', FLV_Tag::TYPE_DATA); |
| | 201 | + //Size of the data tag (BUG: limited to 64Kb) |
| | 202 | + $out.= pack('Cn', 0, strlen($serMeta)); |
| | 203 | + //Timestamp |
| | 204 | + $out.= pack('N', 0); |
| | 205 | + //StreamID |
| | 206 | + $out.= pack('Cn', 0, 0); |
| | 207 | + |
| | 208 | + echo $out; |
| | 209 | + echo $serMeta; |
| | 210 | + |
| | 211 | + // PrevTagSize for the metadata |
| | 212 | + echo pack('N', strlen($serMeta) + strlen($out) ); |
| | 213 | + } |
| | 214 | + |
| | 215 | + $chunkSize = 4096; |
| | 216 | + $skippedOrigMeta = empty($this->origMetaSize); |
| | 217 | + //seek to offset point: |
| | 218 | + fseek($this->fp, $from); |
| | 219 | + while (! feof($this->fp)) |
| | 220 | + { |
| | 221 | + // if the original metadata is pressent and not yet skipped... |
| | 222 | + if (! $skippedOrigMeta) |
| | 223 | + { |
| | 224 | + $pos = ftell($this->fp); |
| | 225 | + |
| | 226 | + // check if we are going to output it in this loop step |
| | 227 | + if ( $pos <= $this->origMetaOfs && |
| | 228 | + $pos + $chunkSize > $this->origMetaOfs ) |
| | 229 | + { |
| | 230 | + // output the bytes just before the original metadata tag |
| | 231 | + if ($this->origMetaOfs - $pos > 0) |
| | 232 | + echo fread($this->fp, $this->origMetaOfs - $pos); |
| | 233 | + |
| | 234 | + // position the file pointer just after the metadata tag |
| | 235 | + fseek($this->fp, $this->origMetaOfs + $this->origMetaSize); |
| | 236 | + |
| | 237 | + $skippedOrigMeta = true; |
| | 238 | + continue; |
| | 239 | + } |
| | 240 | + } |
| | 241 | + if($play_to!=null){ |
| | 242 | + if(ftell($this->fp)+$chunkSize > $play_to){ |
| | 243 | + $read_amount = (ftell($this->fp)+$chunkSize)-$play_to; |
| | 244 | + echo fread($this->fp, $read_amount); |
| | 245 | + break; |
| | 246 | + } |
| | 247 | + } |
| | 248 | + echo fread($this->fp, $chunkSize); |
| | 249 | + } |
| | 250 | + } |
| | 251 | +} |
| | 252 | +?> |