controls_cam.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.

// Timing Control
function getTiming() {
  var i;
  for (i=16;i<24;i++) if (document.camShadowData[i]==65535) document.camShadowData[i]=0;
  if (document.camShadowData[8]==65535) document.camShadowData[8]=0;
  for (i=0;i<8;i++) document.getElementById('idTim'+i).value=document.camShadowData[16+i];  
  document.getElementById('idSupportPeriod').value=document.camShadowData[8] & 3;
}
function setTiming8() {
  var d;
  var s;
  var t=new Date();
  var str= parent.document.cameraMCP+"?";
  str+="w=0010";
  for (i=0;i<8;i++) {
    d= parseInt(document.getElementById('idTim'+i).value);
  	if (!((d>=0) && (d<16))) { // to avoid NaN
	  alert ("All of these times should be in the range 0..15\n"+
	         "Actual time is approximately (7+N) ns");
	  return;
	} else {
      s=d.toString(16);
      while (s.length<4) s="0"+s;
      str+=s;
	}
  }
  str+='&l="'+escape("parent.frames[1].setUpdateStatus()")+'"';	// onLoad    
  str+="&_time="+t.getTime();
//  alert (str);
  parent.frames[0].location=str;
}


function setTimingSupport() {
  var d;
  var s;
  var t=new Date();
  var str= parent.document.cameraMCP+"?";
  str+="w=0008000"+ document.getElementById('idSupportPeriod').value;
  str+='&l="'+escape("parent.frames[1].setUpdateStatus()")+'"';	// onLoad    
  str+="&_time="+t.getTime();
//  alert (str);
  parent.frames[0].location=str;
}

// ============================ PWM Controls ==============================

function getPWMSettings() {

  var dnm;
  var s;
  var i;
  for (i=10;i<13;i++) if (document.camShadowData[i]==65535) document.camShadowData[i]=0;
  dnm=document.camShadowData[11];
  s=document.camShadowData[12].toString(16);
  
  document.getElementById('idNominator').value=0.001*Math.round(document.camShadowData[10]/32.768);
  document.getElementById('idDenominator').value=(dnm<=0x8000)?1:(dnm<=0xc000)?2:(dnm<=0xe000)?3:(dnm<=0xf000)?4:5;
  if (s.length<2) s="0"+s;
  document.getElementById('idPWMOutW').value=s;
}


function setPWMSettings() {
  var s;
  var t=new Date();
  var str= parent.document.cameraMCP+"?";
  var nm=parseFloat(document.getElementById('idNominator').value);
  var ow=parseInt(document.getElementById('idPWMOutW').value,16);
  
// validate them first
  if (!((nm>=0) && (nm<=1.0))) { // to avoid NaN
    if (nm>1.0) nm=1.0;
	else nm=0.0;
  }
  document.getElementById('idNominator').value=nm;
  
  if (!((ow>=0) && (ow<=255))) { // to avoid NaN
    if (ow>255) nm=255;
	else ow=0;
  }
  s=ow.toString(16);
  if (s.length<2) s="0"+s;  
  document.getElementById('idPWMOutW').value=s;

// now send:
  str+="w=000a";
  s=Math.round(nm*32768).toString(16);
  while (s.length<4) s="0"+s;
  str+=s;
  switch (parseInt(document.getElementById('idDenominator').value)) {
   case 1: {str+="8000";break;}
   case 2: {str+="c000";break;}
   case 3: {str+="e000";break;}
   case 4: {str+="f000";break;}
   case 5: {str+="f800";break;}
   default:{str+="8000";break;}
  }
  str+="00"+document.getElementById('idPWMOutW').value;
  str+='&l="'+escape("parent.frames[1].setUpdateStatus()")+'"';	// onLoad    
  str+="&_time="+t.getTime();
//  alert (str);
  parent.frames[0].location=str;
  
  

// will not update itself (for speed)
}

// ============================ Inverter Controls ==============================

function readInverterSequence() {
  	var invShift=64;	// address of first inverter data in camera shadow memory
  	var invLength=64;
	var str="";
	var wi=0;
	var d,c;
	while (wi<invLength){
	  d=document.camShadowData[wi+invShift];
	  c=(d >> 14) & 3;
	  d=(d & 0x3fff);
	  if (c==3) break;
	  switch (c) {
	    case 0: {str+="-"+d;break;}
	    case 1: {str+="/"+d;break;}
	    case 2: {str+="\\"+d;break;}
	  }
	  wi++;
	}
    document.getElementById('idInverterStr').value=str;
}

function setInverterSeq(){
  var t=new Date();
  var str= parent.document.cameraMCP+"?";
  var parseOK=1;
  var i=0;
  var c,d;
  var s=document.getElementById('idInverterStr').value;
  var j;
  var sd;
  var wi=0;
  var ttot=0;
  var tpos=0;
  var tneg=0;
  var maxOn=10; // max % active)	

  str+="w=0040";
  while ((parseOK>0) && (i<s.length) &&(wi<63)) {
// should be -,/,or\  
//alert ("s.charAt(i)="+s.charAt(i));

    switch (s.charAt(i++)) {
	  case '-': {c=0;break}
	  case '/': {c=1;break}
	  case '\\': {c=2;break}
	  default: {
	    alert ("Bad character - "+s.charAt(i-1)+
		       "\nOnly '-'(off), '/' (positive), '\\' (negative)\n"+
			   "and durations (in 50ns steps) are allowed");
		return;
	    parseOK=0;
	  }
	}
	if (!parseOK) break;	// parse error
// now read decimal data
    for (j=i;((j<s.length) && ("0123456789".indexOf(s.charAt(j))>=0));j++);
	d=parseInt(s.substring(i,j));
//alert ("i="+i+"j="+j);
	i=j;
	if ((d<0) || (d>0x3fff)) {
		parseOK=0; // bad number
	    alert ("delays should be positive <= 16383 (0.8 msec)");
		return;
	}
	switch (c) {
	case 1: {tpos+=d;break;}
	case 2: {tneg+=d;break;}
	}
	ttot+=d;
	d+= (c<<14);
	sd=d.toString(16);
	while (sd.length<4) sd="0"+sd;
	str+=sd;
	wi++;
  }
// validate good data
  if (parseOK==0) return;
  d=((tpos+tneg)/ttot)*100;
  if (d>10){
	parseOK=0; // bad number
    alert ("Inverter should be on not more than "+maxOn+"% of time - it could overheat!\n"+
	       "entered - "+d+"%");
	return;
  }
  str+="c000";// - end of sequence
  str+='&l="'+escape("parent.frames[1].setInitAll()")+'"';
  str+="&_time="+t.getTime();
//  alert (str);
  parent.frames[0].location=str;
  
}
function showTurnInverter(d){
  document.getElementById('idTurnInverter').value=d?"turn OFF":"turn ON";
  document.inverterOn=d;
}

function turnInverter(){
  var t=new Date();
  var str= parent.document.cameraMCP+"?";
  showTurnInverter(!document.inverterOn);
  str+="w=000d"+(document.inverterOn? "0004":"0000");
  str+='&l="'+escape("parent.frames[1].setInitAll()")+'"';
  str+="&_time="+t.getTime();
// alert (str);
  parent.frames[0].location=str;
  
}


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



function initMainTableColShow(){
	var n=	document.getElementById('mainTable').rows[0].cells.length /2;
	var i;
	for (i=0;i<n;i++) mainTableColShow(i,1);
}
function mainTableColShow(n,shw) { // if show>0 will show col 2*n and hide 2*n+1, else - opposite
	var mTab=document.getElementById('mainTable');
	var i;
	for (i=0;i<mTab.rows.length;i++) {
		mTab.rows[i].cells[2*n].style.display=(shw)? "" : "none";
		mTab.rows[i].cells[2*n+1].style.display=(shw)? "none":"";
	}
}

/*

document.getElementById('tableSeq');
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 setStatus (s) { // 0 - reset, 1 - armed, 2 - Acquired
    document.lastStatus=s;
    var st=document.getElementById('idStatus')
	if        (document.lastStatus==0) {
		st.className="statusReset";
		st.value="RESET";
		document.getElementById('idArm').value="   ARM   "
	} else if (document.lastStatus==1) {