| Index: branches/MetavidWiki-exp/MetavidWiki/skins/mv_embed/flvServer/MvFlv.php |
| — | — | @@ -0,0 +1,269 @@ |
| | 2 | +<?php |
| | 3 | +
|
| | 4 | +include_once 'FLV/FLV.php';
|
| | 5 | + |
| | 6 | +define('MAX_FLV_TS', 16777.216);//it appears tag times restart after 16777.216 seconds; |
| | 7 | +define('KEY_FRAME_DISTANCE', 2); //max keyframe distance |
| | 8 | + |
| | 9 | +//define('META_KFDATA_EXT', '.KfMeta'); //file extension for cached keframe metadata |
| | 10 | +define('META_DATA_EXT', '.meta'); //basic cached meta |
| | 11 | +
|
| | 12 | +class MyFLV extends FLV {
|
| | 13 | +
|
| | 14 | + /**
|
| | 15 | + * On audio-only files the frame index will use this as minimum gap
|
| | 16 | + */
|
| | 17 | + private $audioFrameGap = 3;
|
| | 18 | +
|
| | 19 | + private $origMetaOfs = 0;
|
| | 20 | + private $origMetaSize = 0;
|
| | 21 | + private $origMetaData;
|
| | 22 | + private $compMetaData; |
| | 23 | + |
| | 24 | + //added segment vars: |
| | 25 | + private $fullMeta=null; |
| | 26 | + private $mDuration=null;
|
| | 27 | +
|
| | 28 | + function playTimeReq($start_time_sec, $end_time_sec=null){ |
| | 29 | + //print "play $start_time_sec to $end_time_sec"; |
| | 30 | + //@@todo cache byte offsets in memcache if avaliable |
| | 31 | + if( $end_time_sec) |
| | 32 | + $this->mDuration = $end_time_sec - $start_time_sec; |
| | 33 | + //print "SET metaDuration to: " . $this->metaDuration . "\n"; |
| | 34 | + //print_r($fullMeta); |
| | 35 | + $meta =& $this->getKeyFrameMetaData(); |
| | 36 | + //print_r($meta); |
| | 37 | + //die; |
| | 38 | + $start_byte=$end_byte=null; |
| | 39 | + if($start_time_sec==0 && $end_time_sec==null)$this->play(); |
| | 40 | + $start_time_ms = $start_time_sec*1000; |
| | 41 | + $end_time_ms = ($end_time_sec==null)?null:$end_time_sec*1000; |
| | 42 | + |
| | 43 | + for($i=0;$i<count($meta['times']);$i++){ |
| | 44 | + //set to the keyframe right before a keyframe of the requested start time |
| | 45 | + if($meta['times'][$i]>=$start_time_ms && $start_byte==null){ |
| | 46 | + $start_byte=(isset($meta['times'][$i-1]))?$meta['filepositions'][$i-1]:$meta['filepositions'][$i]; |
| | 47 | + if($end_time_ms==null)break; |
| | 48 | + } |
| | 49 | + //set to the keyframe right after the keyframe of the end time: |
| | 50 | + if($end_time_ms!=null){ |
| | 51 | + if($meta['times'][$i]>=$end_time_ms){ |
| | 52 | + $end_byte= $meta['filepositions'][$i]; |
| | 53 | + break; |
| | 54 | + } |
| | 55 | + } |
| | 56 | + } |
| | 57 | + //print " bytes: $start_byte $end_byte "; |
| | 58 | + //die; |
| | 59 | + $this->play($start_byte, $end_byte); |
| | 60 | + }
|
| | 61 | + function computeMetaData()
|
| | 62 | + { |
| | 63 | + ini_set("max_execution_time","0");//computeMetaData can take some time
|
| | 64 | + $this->compMetaData = array();
|
| | 65 | + $this->compMetaData['metadatacreator'] = 'FLV Tools';
|
| | 66 | + $this->compMetaData['metadatadate'] = gmdate('Y-m-d\TH:i:s') . '.000Z';
|
| | 67 | + $this->compMetaData['keyframes'] = array();
|
| | 68 | + $this->compMetaData['keyframes']['filepositions'] = array();
|
| | 69 | + $this->compMetaData['keyframes']['times'] = array();
|
| | 70 | +
|
| | 71 | + $this->origMetaOfs = 0;
|
| | 72 | + $this->origMetaSize = 0;
|
| | 73 | + $this->origMetaData = null;
|
| | 74 | +
|
| | 75 | + $skipTagTypes = array();
|
| | 76 | + while ($tag = $this->getTag( $skipTagTypes ))
|
| | 77 | + {
|
| | 78 | + // pre-calculate the timestamp as seconds
|
| | 79 | + $ts = $tag->timestamp/1000; |
| | 80 | + if ($tag->timestamp > 0 && $tag->type==FLV_Tag::TYPE_VIDEO ){ |
| | 81 | + $ts = (MAX_FLV_TS*$this->wrapTimeCount) + $ts; |
| | 82 | + if($ts < $this->compMetaData['lasttimestamp']){ |
| | 83 | + $this->wrapTimeCount++; |
| | 84 | + $ts = MAX_FLV_TS + $ts; |
| | 85 | + } |
| | 86 | + //print "set end time to $ts \n"; |
| | 87 | + $this->compMetaData['lasttimestamp'] = $ts; |
| | 88 | + }
|
| | 89 | +
|
| | 90 | + switch ($tag->type)
|
| | 91 | + {
|
| | 92 | + case FLV_Tag::TYPE_VIDEO :
|
| | 93 | +
|
| | 94 | + //Optimization, extract the frametype without analyzing the tag body
|
| | 95 | + if ((ord($tag->body[0]) >> 4) == FLV_Tag_Video::FRAME_KEYFRAME)
|
| | 96 | + {
|
| | 97 | + $this->compMetaData['keyframes']['filepositions'][] = $this->getTagOffset();
|
| | 98 | + $this->compMetaData['keyframes']['times'][] = $ts;
|
| | 99 | + }
|
| | 100 | +
|
| | 101 | + if ( !in_array(FLV_TAG::TYPE_VIDEO, $skipTagTypes) )
|
| | 102 | + {
|
| | 103 | + $this->compMetaData['width'] = $tag->width;
|
| | 104 | + $this->compMetaData['height'] = $tag->height;
|
| | 105 | + $this->compMetaData['videocodecid'] = $tag->codec;
|
| | 106 | + //Processing one video tag is enough
|
| | 107 | + array_push( $skipTagTypes, FLV_Tag::TYPE_VIDEO );
|
| | 108 | + }
|
| | 109 | + break;
|
| | 110 | +
|
| | 111 | + case FLV_Tag::TYPE_AUDIO :
|
| | 112 | +
|
| | 113 | + //Save audio frame positions when there is no video
|
| | 114 | + if (!$flv->hasVideo && $ts - $oldTs > $this->audioFrameGap)
|
| | 115 | + {
|
| | 116 | + $this->compMetaData['keyframes']['filepositions'][] = $this->getTagOffset();
|
| | 117 | + $this->compMetaData['keyframes']['times'][] = $ts;
|
| | 118 | + $oldTs = $ts;
|
| | 119 | + }
|
| | 120 | +
|
| | 121 | + if ( !in_array( FLV_Tag::TYPE_AUDIO, $skipTagTypes) )
|
| | 122 | + {
|
| | 123 | + $this->compMetaData['audiocodecid'] = $tag->codec;
|
| | 124 | + $this->compMetaData['audiofreqid'] = $tag->frequency;
|
| | 125 | + $this->compMetaData['audiodepthid'] = $tag->depth;
|
| | 126 | + $this->compMetaData['audiomodeid'] = $tag->mode;
|
| | 127 | +
|
| | 128 | + //Processing one audio tag is enough
|
| | 129 | + array_push( $skipTagTypes, FLV_Tag::TYPE_AUDIO );
|
| | 130 | + }
|
| | 131 | +
|
| | 132 | + break;
|
| | 133 | +
|
| | 134 | + case FLV_Tag::TYPE_DATA :
|
| | 135 | + if ($tag->name == 'onMetaData')
|
| | 136 | + {
|
| | 137 | + $this->origMetaOfs = $this->getTagOffset();
|
| | 138 | + $this->origMetaSize = $tag->size + self::TAG_HEADER_SIZE;
|
| | 139 | + $this->origMetaData = $tag->value;
|
| | 140 | + }
|
| | 141 | + break;
|
| | 142 | + }
|
| | 143 | +
|
| | 144 | + //Does this actually help with memory allocation?
|
| | 145 | + unset($tag);
|
| | 146 | + }
|
| | 147 | +
|
| | 148 | + if (! empty($this->compMetaData['keyframes']['times']))
|
| | 149 | + $this->compMetaData['lastkeyframetimestamp'] = $this->compMetaData['keyframes']['times'][ count($this->compMetaData['keyframes']['times'])-1 ];
|
| | 150 | +
|
| | 151 | + $this->compMetaData['duration'] = $this->compMetaData['lasttimestamp'];
|
| | 152 | +
|
| | 153 | + return $this->compMetaData;
|
| | 154 | + }
|
| | 155 | +
|
| | 156 | + function setMetaData( $metadata, $origMetaOfs = 0, $origMetaSize = 0 )
|
| | 157 | + {
|
| | 158 | + $this->compMetaData = $metadata;
|
| | 159 | + $this->origMetaOfs = $origMetaOfs;
|
| | 160 | + $this->origMetaSize = $origMetaSize;
|
| | 161 | + } |
| | 162 | + /* returns merged metadata*/
|
| | 163 | + function getMetaData()
|
| | 164 | + { |
| | 165 | + if($this->fullMeta)return $this->fullMeta; |
| | 166 | + if(is_file($this->fname . META_DATA_EXT)){ |
| | 167 | + $this->fullMeta = unserialize(file_get_contents ($this->fname . META_DATA_EXT)); |
| | 168 | + }else{ |
| | 169 | + $this->computeMetaData();
|
| | 170 | + if (! is_array($this->origMetaData)){
|
| | 171 | + $this->fullMeta = $this->compMetaData;
|
| | 172 | + }else{
|
| | 173 | + $this->fullMeta = array_merge( $this->origMetaData, $this->compMetaData ); |
| | 174 | + } |
| | 175 | + |
| | 176 | + //save fullMeta to file (fix keyfames) |
| | 177 | + foreach($this->compMetaData['keyframes']['times'] as $inx=>&$ts){ |
| | 178 | + $ts = (int)($ts*1000); |
| | 179 | + } |
| | 180 | + if(!file_put_contents($this->fname . META_DATA_EXT, serialize($this->compMetaData))){ |
| | 181 | + throw( new FLV_FileException('Unable to write out cached keyframe output') ); |
| | 182 | + } |
| | 183 | + } |
| | 184 | + return $this->fullMeta;
|
| | 185 | + } |
| | 186 | + function getKeyFrameMetaData(){ |
| | 187 | + $meta = & $this->getMetaData(); |
| | 188 | + return $meta['keyframes']; |
| | 189 | + } |
| | 190 | + function getSegmentMetaData(){ |
| | 191 | + //pull base cached metadata |
| | 192 | + //update duration & return new array |
| | 193 | + $meta = & $this->getMetaData(); |
| | 194 | + $meta['keyframes']=array(); |
| | 195 | + //@@todo update all the other metadata to match segment outupt |
| | 196 | + return $meta; |
| | 197 | + }
|
| | 198 | +
|
| | 199 | + function play( $from = 0, $play_to=null )
|
| | 200 | + { |
| | 201 | + fseek($this->fp, 0);
|
| | 202 | +
|
| | 203 | + // get original file header just in case it has any special flag
|
| | 204 | + echo fread($this->fp, $this->bodyOfs + 4);
|
| | 205 | +
|
| | 206 | + // output the metadata if available
|
| | 207 | + $meta = $this->getSegmentMetaData();
|
| | 208 | + if (! empty($meta))
|
| | 209 | + {
|
| | 210 | + //serialize the metadata as an AMF stream
|
| | 211 | + include_once 'FLV/Util/AMFSerialize.php';
|
| | 212 | + $amf = new FLV_Util_AMFSerialize();
|
| | 213 | +
|
| | 214 | + $serMeta = $amf->serialize('onMetaData');
|
| | 215 | + $serMeta.= $amf->serialize($meta);
|
| | 216 | +
|
| | 217 | + //Data tag mark
|
| | 218 | + $out = pack('C', FLV_Tag::TYPE_DATA);
|
| | 219 | + //Size of the data tag (BUG: limited to 64Kb)
|
| | 220 | + $out.= pack('Cn', 0, strlen($serMeta));
|
| | 221 | + //Timestamp
|
| | 222 | + $out.= pack('N', 0);
|
| | 223 | + //StreamID
|
| | 224 | + $out.= pack('Cn', 0, 0);
|
| | 225 | +
|
| | 226 | + echo $out;
|
| | 227 | + echo $serMeta;
|
| | 228 | +
|
| | 229 | + // PrevTagSize for the metadata
|
| | 230 | + echo pack('N', strlen($serMeta) + strlen($out) );
|
| | 231 | + }
|
| | 232 | +
|
| | 233 | + $chunkSize = 4096;
|
| | 234 | + $skippedOrigMeta = empty($this->origMetaSize); |
| | 235 | + //seek to offset point: |
| | 236 | + fseek($this->fp, $from);
|
| | 237 | + while (! feof($this->fp))
|
| | 238 | + {
|
| | 239 | + // if the original metadata is pressent and not yet skipped...
|
| | 240 | + if (! $skippedOrigMeta)
|
| | 241 | + {
|
| | 242 | + $pos = ftell($this->fp);
|
| | 243 | +
|
| | 244 | + // check if we are going to output it in this loop step
|
| | 245 | + if ( $pos <= $this->origMetaOfs &&
|
| | 246 | + $pos + $chunkSize > $this->origMetaOfs )
|
| | 247 | + {
|
| | 248 | + // output the bytes just before the original metadata tag
|
| | 249 | + if ($this->origMetaOfs - $pos > 0)
|
| | 250 | + echo fread($this->fp, $this->origMetaOfs - $pos);
|
| | 251 | +
|
| | 252 | + // position the file pointer just after the metadata tag
|
| | 253 | + fseek($this->fp, $this->origMetaOfs + $this->origMetaSize);
|
| | 254 | +
|
| | 255 | + $skippedOrigMeta = true;
|
| | 256 | + continue;
|
| | 257 | + }
|
| | 258 | + }
|
| | 259 | + if($play_to!=null){ |
| | 260 | + if(ftell($this->fp)+$chunkSize > $play_to){ |
| | 261 | + $read_amount = (ftell($this->fp)+$chunkSize)-$play_to; |
| | 262 | + echo fread($this->fp, $read_amount); |
| | 263 | + break; |
| | 264 | + } |
| | 265 | + }
|
| | 266 | + echo fread($this->fp, $chunkSize);
|
| | 267 | + }
|
| | 268 | + }
|
| | 269 | +} |
| | 270 | +?> |
| \ No newline at end of file |