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"use strict";var MjpegSession=function(){function a(){this.decoder=new MJPEGDecoder,this.firstTime=0,this.lastMSW=0}var b=0,c=0,d=0,e={frameData:null,timeStamp:null},f={timestamp:null,timezone:null},g=0,h=0,i=0,j=0,k=0,l=0,m=!1,n=null,o=null,p=null,q=null,r=0,s=0,t=0,u=0,v=8e3,w=0,x={width:0,height:0};return a.prototype={init:function(){this.decoder.setIsFirstFrame(!1),this.videoBufferList=new VideoBufferList,d=0,this.timeData=null},parseRTPData:function(a,d,q,r,s){var t=new Uint8Array(1048576);b=s.width,c=s.height,n={},o={};var y=d[22],z=d.subarray(24+y,d.length-8);p=z.length;var A=(d[19]<<24)+(d[18]<<16)+(d[17]<<8)+d[16]>>>0,B=Date.UTC("20"+(A>>26),(A>>22&15)-1,A>>17&31,A>>12&31,A>>6&63,63&A)/1e3;if(B-=28800,0==this.firstTime)this.firstTime=B,this.lastMSW=0,l=(d[21]<<8)+d[20],f={timestamp:this.firstTime,timestamp_usec:0};else{var C,D=(d[21]<<8)+d[20];C=D>l?D-l:D+65535-l,this.lastMSW+=C,B>this.firstTime&&(this.lastMSW-=1e3),this.firstTime=B,f={timestamp:B,timestamp_usec:this.lastMSW},l=D}0!==this.getFramerate()&&"undefined"!=typeof this.getFramerate()||"undefined"==typeof this.getTimeStamp()||this.setFramerate(Math.round(1e3/((f.timestamp-this.getTimeStamp().timestamp===0?0:1e3)+(f.timestamp_usec-this.getTimeStamp().timestamp_usec)))),this.setTimeStamp(f),k=(d[21]<<8)+d[20],h=p,j=h,t=this.appendBuffer(t,z,g),g+=p,t[g+j-2]=255,t[g+j-1]=217,i++,(x.width!=b||x.height!=c)&&(0!=x.width?(x.width=b,x.height=c,o.resolution=x,o.resolution.decodeMode="canvas",o.resolution.encodeMode="mjpeg"):(x.width=b,x.height=c,o.decodeStart=x,o.decodeStart.decodeMode="canvas",o.decodeStart.encodeMode="mjpeg"));var E=1e3*f.timestamp+f.timestamp_usec;0==this.firstDiffTime?(u=0,this.firstDiffTime=Date.now()-E,debug.log("firstDiff: "+this.firstTime)):(0>E-w&&(this.firstDiffTime=u+(Date.now()-E).toFixed(0)),u=Date.now()-E-this.firstDiffTime,0>u&&(this.firstDiffTime=0,u=0),u>v&&(o.error={errorCode:101},this.rtpReturnCallback(o))),w=E,e.frameData=null,(q!==!0||m!==!0)&&(this.decoder.setResolution(b,c),e.frameData=this.decoder.decode(t.subarray(0,g))),e.timeStamp=null,f=null===f.timestamp?this.getTimeStamp():f,e.timeStamp=f,q===!0&&(o.backupData={stream:t.subarray(0,g),width:b,height:c,codecType:"mjpeg"},null!==f.timestamp&&"undefined"!=typeof f.timestamp?o.backupData.timestamp_usec=f.timestamp_usec:o.backupData.timestamp=(k/90).toFixed(0)),g=0,e.playback=m,o.decodedData=e,"canvas"!==decodeMode&&(o.decodeMode="canvas"),this.rtpReturnCallback(o)},getVideoBuffer:function(a){return null!==this.videoBufferList?this.videoBufferList.searchNodeAt(a):void 0},clearBuffer:function(){null!==this.videoBufferList&&this.videoBufferList.clear()},findCurrent:function(){null!==this.videoBufferList&&this.videoBufferList.searchTimestamp(this.getTimeStamp())},findIFrame:function(){null!==this.videoBufferList&&this.videoBufferList.findIFrame()},SetRtpInterlevedID:function(a){this.interleavedID=a},setTimeStamp:function(a){this.timeData=a},getTimeStamp:function(){return this.timeData},getRTPPacket:function(){},calculatePacketTime:function(){},ntohl:function(a){return(a[0]<<24)+(a[1]<<16)+(a[2]<<8)+a[3]>>>0},appendBuffer:function(a,b,c){var d=1048576;if(c+b.length>=a.length){var e=new Uint8Array(a.length+d);e.set(a,0),a=e}return a.set(b,c),a},setFramerate:function(a){a>0&&"undefined"!=typeof a&&(t=a,null!==this.videoBufferList&&(this.videoBufferList.setMaxLength(6*t),this.videoBufferList.setBUFFERING(4*t)))},getFramerate:function(){return t},setReturnCallback:function(a){this.rtpReturnCallback=a},setBufferfullCallback:function(a){null!==this.videoBufferList&&this.videoBufferList.setBufferFullCallback(a)},setGovLength:function(a){q=a},getGovLength:function(){return q},setDecodingTime:function(a){this.decodingTime=a},getDropPercent:function(){return r},getDropCount:function(){return s},initStartTime:function(){this.firstDiffTime=0,this.calcGov=0},setCheckDelay:function(a){this.checkDelay=a}},new a};
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