controls_seq.js

linux平台上的开放源代码的网络摄像机程序.实现视频捕捉,传输以及云台控制等.非常具有参考价值.

// ===================================================================================

function to10ns(s) {
//	var d= Math.round(parseFloat(s)*100);
	var d= parseFloat(s);
	if (d.isNaN) d=0;
	if (s.toLowerCase().indexOf("ns") == -1) { //default "ns"
		if      (s.toLowerCase().indexOf("us") != -1) d=1000*d;
		else if (s.toLowerCase().indexOf("ms") != -1) d=1000000*d;
		else if (s.toLowerCase().indexOf("s" ) != -1) d=1000000000*d;
	}
	return Math.round(d/10)*10;
}

// ===================================================================================

function nsToStr(v) {
	if      (v<1000)		return v.toString()+"ns";
	else if (v<1000000)		return (v/1000).toString()+"us";
	else 					return (v/1000000).toString()+"ms";
}

// ===================================================================================

function setSeqTabCellInput(i,j,l,v,enbl,shw) {	//i,j should be within table range
	var tab=document.tabP;
	while (tab.rows[i].cells[j].firstChild) tab.rows[i].cells[j].removeChild(tab.rows[i].cells[j].firstChild);
	if (l) {
	  var fe= document.createElement('input');
	  fe.type="text";
	  fe.size=l;
      tab.rows[i].cells[j].appendChild(fe);
	  tab.rows[i].cells[j].firstChild.value=v;
	  if (enbl) tab.rows[i].cells[j].firstChild.className="inputEnabled";
	  else {
		tab.rows[i].cells[j].firstChild.readOnly= true;
		tab.rows[i].cells[j].firstChild.className="inputDisabled";
	  }
      tab.rows[i].cells[j].style.display=(shw)? "" : "none";
	}

}

// ===================================================================================

function setSeqTabCellText(i,j,v,a) {	//i,j should be within table range
	var tab=document.tabP;
	while (tab.rows[i].cells[j].firstChild) tab.rows[i].cells[j].removeChild(tab.rows[i].cells[j].firstChild);
	if (v) {
	  var fe= document.createTextNode(v);
      tab.rows[i].cells[j].appendChild(fe);
      tab.rows[i].cells[j].align=a;
	}
}

// ===================================================================================

function showSeqTabCell (i,j,s) {	//i,j should be within table range
	var tab=document.tabP;
     tab.rows[i].cells[j].style.display=(s)? "" : "none";
}

// ===================================================================================

function seqAddRow() {
//add row to Array
	var last=(document.SeqTabLen>0)? (document.SeqTab[document.SeqTabLen-1][1]):0;
	document.SeqTabLen++;
	if (document.SeqTab.length < document.SeqTabLen) document.SeqTab[document.SeqTabLen-1]= new Array(2);
	document.SeqTab[document.SeqTabLen-1][0]=last+10;
	document.SeqTab[document.SeqTabLen-1][1]=last+20;
  rebuildSeqTab();
}


// ===================================================================================

function seqDelRow() {
//delete last row from the Array
	if (document.SeqTabLen >0) 	document.SeqTabLen--;
	rebuildSeqTab();
}

// ===================================================================================

function seqUpdate() {
	var  tab=document.tabP;
	var i, j, t;
	var showDelay=   (document.getElementById("delayShow").checked)? 1:0;
	var showStart=   (document.getElementById("startShow").checked)? 1:0;
	var showDuration=(document.getElementById("durationShow").checked)? 1:0;
	var showEnd=     (document.getElementById("endShow").checked)? 1:0;

	var specifyDelay=   document.getElementById("delaySpecify").checked;
	var specifyStart=   !specifyDelay;
	var specifyDuration=document.getElementById("durationSpecify").checked;
	var specifyEnd=     !specifyDuration;
	var len;

// 1-st pass - build tabele "as is"
	t=0;
	for (i=1;i<tab.rows.length;i++) {
//		start?
		t=specifyStart?
			(to10ns(tab.rows[i].cells[2].firstChild.value)):
			(t+to10ns(tab.rows[i].cells[1].firstChild.value));
		document.SeqTab[i-1][0]=t;
//		end?
		t=specifyEnd?
			to10ns(tab.rows[i].cells[4].firstChild.value):
			(t+to10ns(tab.rows[i].cells[3].firstChild.value));
		document.SeqTab[i-1][1]=t;
	}
	len=tab.rows.length-1;
	i=0;
// remove 0 or negative duration pulses
	while (i<len)
		if (document.SeqTab[i][1] <= document.SeqTab[i][0]) {
			len--;
			for (j=i;j<len;j++) {
				document.SeqTab[j][0]=document.SeqTab[j+1][0];	//cannot reassign arrays - 2 will point to 1
				document.SeqTab[j][1]=document.SeqTab[j+1][1];
			}
		} else i++;
	
// sort by "start"
//	alert (document.SeqTab.toString());
	i=0;
	while (i<(len-1))
		if (document.SeqTab[i][0] > document.SeqTab[i+1][0]) {
			t=document.SeqTab[i+1];// swapping of arrays is fine
			document.SeqTab[i+1]=document.SeqTab[i];
			document.SeqTab[i]=t;
//	alert ("i="+i+" array="+document.SeqTab.toString());
			if (i>0) i--;
		} else i++;
//	alert ("After sorting: i="+i+" array="+document.SeqTab.toString());
// find overlapping
	i=1;
	while (i<len)
		if (document.SeqTab[i][0] <= document.SeqTab[i-1][1]) { // combine and remove second...
			if (document.SeqTab[i][1] > document.SeqTab[i-1][1]) document.SeqTab[i-1][1] = document.SeqTab[i][1];
			len--;
			for (j=i;j<len;j++) {
				document.SeqTab[j][0]=document.SeqTab[j+1][0];	//cannot reassign arrays - 2 will point to 1
				document.SeqTab[j][1]=document.SeqTab[j+1][1];
			}
		} else i++;

	document.SeqTabLen=len;
  rebuildSeqTab();
  
	if (seqCompile()) {
		seqSendCompiled();
	}
}

// ===================================================================================

function seqCompile() {
	var wi=0;	// sequencer word index (0..127)
	var ci=0;	// sequencer command index (in the same word - 0..3)
	var	tim=0;
	var	i,j;
	var	dly;
	seqPgmW=new Array();
	seqPgmD=new Array();
	i=0;
	j=0;	// 0 - "on", 1 - "off"


	while ((i<document.SeqTabLen) && (wi<128)) {
		if (ci ==0) {seqPgmW[wi]=new Array(0,0,0,0);seqPgmD[wi]=0;}
// can add "on"(or "off") to the same word?
		if ((document.SeqTab[i][j]-tim) <= ((3-ci)*10)) {
			ci=ci+(document.SeqTab[i][j]-tim)/10;
			seqPgmW[wi][ci]=j+1;	// 1 - "on", 2 - "off"
			tim=document.SeqTab[i][j]+10;
			ci++; if (ci>3) {ci=0;wi++;}
			j++;	if (j>1) {j=0;i++;}
		} else { // no
			tim+= (4-ci)*10;
			dly=Math.floor((document.SeqTab[i][j]-tim)/40);
			if (dly > 32767) dly=32767;
			seqPgmD[wi]=dly;
			tim+=40*dly;
			wi++;
			ci=0;
		}
	}
// add "sequence end"
	if (ci ==0) {seqPgmW[wi]=new Array(0,0,0,0);seqPgmD[wi]=0;}
	seqPgmW[wi][ci]=3;
	if (wi>=128) {
		alert ("Can not program sequencer - sequence too long");
		return -1;
	}
	document.camSeqData=new Array(2 *seqPgmW.length);	
	for (i=0;i<seqPgmW.length;i++) {
	  document.camSeqData[2*i  ]=seqPgmW[i][0] + 4*seqPgmW[i][1] + 16*seqPgmW[i][2] + 64*seqPgmW[i][3];
	  document.camSeqData[2*i+1]=seqPgmD[i];
	}
	return 1;
}

// ===================================================================================

function seqSendCompiled() {
  var t=new Date();
    var str= parent.document.cameraMCP+"?";
	var i,d;
	str+="w=0200"; // start of
	for (i=0;i<document.camSeqData.length;i++) {
		d=document.camSeqData[i].toString(16);
		while (d.length<4) d="0"+d;
		str+=d;
	}

	str+='&l="'+escape("parent.frames[1].setUpdateStatus()")+'"';

	str+="&_time="+t.getTime();
//	alert (str);
   parent.frames[0].location=str;
}	 


// ===================================================================================

function seqDeCompile () {	// after reading from camera
	var seqShift=512;	// address of first sequencer data in camera shadow memory
	var tim=0;
	var np=0;
	var pOn=0;	//pulse "on"
	var wi=0;
	var	ci=0;
	var d,d1,i;
	var cmds=new Array (0,0,0,0);
	while (wi < 128) {
		if (ci==0) {
//			d=document.camSeqData[2*wi];
			d=document.camShadowData[2*wi+seqShift];
			for (i=0;i<4;i++) {
				d1=Math.floor(d/4);
				cmds[i] = d-4*d1;
				d=d1;
			}
		}
		if      ((pOn==0) && (cmds[ci]==1)) {
			if (document.SeqTab.length<=np) document.SeqTab[np]=new Array (0,0);
			document.SeqTab[np][pOn]=tim;
			pOn=1;
		} else if ((pOn==1) && (cmds[ci]==2)) {
			if (document.SeqTab.length<=np) document.SeqTab[np]=new Array (0,0);
			document.SeqTab[np][pOn]=tim;
			pOn=0;
			np++;
		} else if (cmds[ci]==3) {	// end of sequence
			if (pOn) {
				if (document.SeqTab.length<=np) document.SeqTab[np]=new Array (0,0);
				document.SeqTab[np][pOn]=tim;
				pOn=0;
				np++;
			}
			document.SeqTabLen=np;
			break; //while (wi<(document.camSeqData.length/2))
		}
		ci++;
		tim+=10;
		if (ci>3) {
//			tim+= 40*document.camSeqData[2*wi+1];
			tim+= 40*document.camShadowData[2*wi+seqShift+1];
			ci=0;
			wi++;
		}
	}
	rebuildSeqTab();
//	alert ("before setUpdateStatus()");

}

// ===================================================================================

function rebuildSeqTab(){
	var  tab=document.tabP;
	var	 nr,nc0,nc1,nc2,nc3,nc4, tim, fe;

	var showDelay=   (document.getElementById("delayShow").checked)? 1:0;
	var showStart=   (document.getElementById("startShow").checked)? 1:0;
	var showDuration=(document.getElementById("durationShow").checked)? 1:0;
	var showEnd=     (document.getElementById("endShow").checked)? 1:0;

	var specifyDelay=   document.getElementById("delaySpecify").checked;
	var specifyStart=   !specifyDelay;
	var specifyDuration=document.getElementById("durationSpecify").checked;
	var specifyEnd=     !specifyDuration;
//	alert("document.SeqTab.length="+document.SeqTab.length);
// delete all rows in a table
	while (tab.rows.length)  tab.deleteRow(tab.rows.length-1);
	tim = 0;
	  nr=tab.insertRow(0);
	  nr.insertCell(0);	// pulse #
  	  nr.insertCell(1); // delay
  	  nr.insertCell(2); // satart
  	  nr.insertCell(3); // duration
  	  nr.insertCell(4); // end

	  setSeqTabCellText (0,0,"pulse#","center");
	  setSeqTabCellText (0,1,"Delay","center");
	  showSeqTabCell	 (0,1,showDelay);
      setSeqTabCellText (0,2,"Start","center");
	  showSeqTabCell	 (0,2,showStart);
	  setSeqTabCellText (0,3,"Duration","center");
	  showSeqTabCell	 (0,3,showDuration);
      setSeqTabCellText (0,4,"End","center");
	  showSeqTabCell	 (0,4,showEnd);
	tim=0;
	for (i=0;i<document.SeqTabLen;i++) {
//	  nr=tab.insertRow(tab.rows.length);
	  nr=tab.insertRow(i+1);
	  nr.insertCell(0);	// pulse #
  	  nr.insertCell(1); // delay
  	  nr.insertCell(2); // satart
  	  nr.insertCell(3); // duration
  	  nr.insertCell(4); // end

	                    setSeqTabCellText  (i+1,0,i+1,"center");
	  setSeqTabCellInput (i+1,1,8,nsToStr(document.SeqTab[i][0] - tim),specifyDelay,showDelay);
	  setSeqTabCellInput (i+1,2,8,nsToStr(document.SeqTab[i][0]),specifyStart,showStart);
	  tim=document.SeqTab[i][0];
	  setSeqTabCellInput (i+1,3,8,nsToStr(document.SeqTab[i][1] - tim),specifyDuration,showDuration);
	  setSeqTabCellInput (i+1,4,8,nsToStr(document.SeqTab[i][1]),specifyEnd,showEnd);
	  tim=document.SeqTab[i][1];

	}
}

// ===================================================================================

function initSeqTab() {
	document.SeqTab=new Array(new Array(0,10)); //format start(ns), endns)
	document.SeqTabLen=document.SeqTab.length;
	document.tabP=document.getElementById('tableSeq');
	rebuildSeqTab();
}

// ===================================================================================