function analyze()
 {
     $bits = new FLV_Util_BitStreamReader($this->body);
     $this->codec = $bits->getInt(4);
     $this->frequency = $bits->getInt(2);
     $this->depth = $bits->getInt(1);
     $this->mode = $bits->getInt(1);
 }
 function analyze()
 {
     $bits = new FLV_Util_BitStreamReader($this->body);
     $this->codec = $bits->getInt(4);
     $this->codec_name = $this->audioFormat($this->codec);
     $this->frequency = $bits->getInt(2);
     $this->frequency_rate = $this->audioFormat($this->frequency);
     $this->depth = $bits->getInt(1);
     $this->depth_bit = $this->audioBitDepth($this->depth);
     $this->mode = $bits->getInt(1);
     $this->mode_name = $this->audioMode($this->mode);
 }
 function analyze()
 {
     $bits = new FLV_Util_BitStreamReader($this->body);
     $this->frametype = $bits->getInt(4);
     $this->codec = $bits->getInt(4);
     $this->codec_name = $this->videoCodec($this->codec);
     switch ($this->codec) {
         case $this->CODEC_SORENSON_H263:
             //skip video packet header
             $bits->seek(17 + 5 + 8, SEEK_CUR);
             $type = $bits->getInt(3);
             switch ($type) {
                 case 0x0:
                     $this->width = $bits->getInt(8);
                     $this->height = $bits->getInt(8);
                     break;
                 case 0x1:
                     $this->width = $bits->getInt(16);
                     $this->height = $bits->getInt(16);
                     break;
                 case 0x2:
                     //CIF
                     $this->width = 352;
                     $this->height = 288;
                     break;
                 case 0x3:
                     //QCIF
                     $this->width = 176;
                     $this->height = 144;
                     break;
                 case 0x4:
                     //SQCIF
                     $this->width = 128;
                     $this->height = 96;
                     break;
                 case 0x5:
                     $this->width = 320;
                     $this->height = 240;
                     break;
                 case 0x6:
                     $this->width = 160;
                     $this->height = 120;
                     break;
             }
             break;
         case $this->CODEC_SORENSON:
             $bits->seek(4, SEEK_CUR);
             $this->width = $bits->getInt(12);
             $bits->seek(4, SEEK_CUR);
             $this->height = $bits->getInt(12);
             break;
             // format layout taken from libavcodec project (http://ffmpeg.mplayerhq.hu/)
         // format layout taken from libavcodec project (http://ffmpeg.mplayerhq.hu/)
         case $this->CODEC_ON2_VP6:
             if ($this->frametype == 1) {
                 $adjW = $bits->getInt(4);
                 $adjH = $bits->getInt(4);
                 $mode = $bits->getInt(1);
                 if ($mode === 0) {
                     $bits->seek(15, SEEK_CUR);
                     $this->height = $bits->getInt(8) * 16 - $adjH;
                     $this->width = $bits->getInt(8) * 16 - $adjW;
                 }
             }
             break;
         case $this->CODEC_ON2_VP6ALPHA:
             if ($this->frametype == 1) {
                 $adjW = $bits->getInt(4);
                 $adjH = $bits->getInt(4);
                 $mode = $bits->getInt(1);
                 if ($mode === 0) {
                     $bits->seek(39, SEEK_CUR);
                     $this->height = $bits->getInt(8) * 16 - $adjH;
                     $this->width = $bits->getInt(8) * 16 - $adjW;
                 }
             }
             break;
             /* TODO: not tested */
         /* TODO: not tested */
         case $this->CODEC_SCREENVIDEO_2:
             $this->width = $bits->getInt(12);
             $this->height = $bits->getInt(12);
             break;
         default:
             break;
     }
 }