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app.js
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app.js
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/* jshint -W117 */
/* application specific logic */
var connection = null;
var focus = null;
var activecall = null;
var RTC = null;
var nickname = null;
var sharedKey = '';
var roomUrl = null;
var ssrc2jid = {};
/**
* Indicates whether ssrc is camera video or desktop stream.
* FIXME: remove those maps
*/
var ssrc2videoType = {};
var videoSrcToSsrc = {};
var localVideoSrc = null;
var flipXLocalVideo = true;
var isFullScreen = false;
var toolbarTimeout = null;
var currentVideoWidth = null;
var currentVideoHeight = null;
/**
* Method used to calculate large video size.
* @type {function ()}
*/
var getVideoSize;
/**
* Method used to get large video position.
* @type {function ()}
*/
var getVideoPosition;
/* window.onbeforeunload = closePageWarning; */
function init() {
RTC = setupRTC();
if (RTC === null) {
window.location.href = 'webrtcrequired.html';
return;
} else if (RTC.browser !== 'chrome') {
window.location.href = 'chromeonly.html';
return;
}
connection = new Strophe.Connection(document.getElementById('boshURL').value || config.bosh || '/http-bind');
if (nickname) {
connection.emuc.addDisplayNameToPresence(nickname);
}
if (connection.disco) {
// for chrome, add multistream cap
}
connection.jingle.pc_constraints = RTC.pc_constraints;
if (config.useIPv6) {
// https://code.google.com/p/webrtc/issues/detail?id=2828
if (!connection.jingle.pc_constraints.optional) connection.jingle.pc_constraints.optional = [];
connection.jingle.pc_constraints.optional.push({googIPv6: true});
}
var jid = document.getElementById('jid').value || config.hosts.domain || window.location.hostname;
connection.connect(jid, document.getElementById('password').value, function (status) {
if (status === Strophe.Status.CONNECTED) {
console.log('connected');
if (config.useStunTurn) {
connection.jingle.getStunAndTurnCredentials();
}
obtainAudioAndVideoPermissions(function () {
getUserMediaWithConstraints(['audio'], audioStreamReady,
function (error) {
console.error('failed to obtain audio stream - stop', error);
});
});
document.getElementById('connect').disabled = true;
} else {
console.log('status', status);
}
});
}
/**
* HTTPS only:
* We first ask for audio and video combined stream in order to get permissions and not to ask twice.
* Then we dispose the stream and continue with separate audio, video streams(required for desktop sharing).
*/
function obtainAudioAndVideoPermissions(callback) {
// This makes sense only on https sites otherwise we'll be asked for permissions every time
if (location.protocol !== 'https:') {
callback();
return;
}
// Get AV
getUserMediaWithConstraints(
['audio', 'video'],
function (avStream) {
avStream.stop();
callback();
},
function (error) {
console.error('failed to obtain audio/video stream - stop', error);
});
}
function audioStreamReady(stream) {
change_local_audio(stream);
if (RTC.browser !== 'firefox') {
getUserMediaWithConstraints(['video'], videoStreamReady, videoStreamFailed, config.resolution || '360');
} else {
doJoin();
}
}
function videoStreamReady(stream) {
change_local_video(stream, true);
doJoin();
}
function videoStreamFailed(error) {
console.warn("Failed to obtain video stream - continue anyway", error);
doJoin();
}
function doJoin() {
var roomnode = null;
var path = window.location.pathname;
var roomjid;
// determinde the room node from the url
// TODO: just the roomnode or the whole bare jid?
if (config.getroomnode && typeof config.getroomnode === 'function') {
// custom function might be responsible for doing the pushstate
roomnode = config.getroomnode(path);
} else {
/* fall back to default strategy
* this is making assumptions about how the URL->room mapping happens.
* It currently assumes deployment at root, with a rewrite like the
* following one (for nginx):
location ~ ^/([a-zA-Z0-9]+)$ {
rewrite ^/(.*)$ / break;
}
*/
if (path.length > 1) {
roomnode = path.substr(1).toLowerCase();
} else {
roomnode = Math.random().toString(36).substr(2, 20);
window.history.pushState('VideoChat',
'Room: ' + roomnode, window.location.pathname + roomnode);
}
}
roomjid = roomnode + '@' + config.hosts.muc;
if (config.useNicks) {
var nick = window.prompt('Your nickname (optional)');
if (nick) {
roomjid += '/' + nick;
} else {
roomjid += '/' + Strophe.getNodeFromJid(connection.jid);
}
} else {
roomjid += '/' + Strophe.getNodeFromJid(connection.jid).substr(0, 8);
}
connection.emuc.doJoin(roomjid);
}
function change_local_audio(stream) {
connection.jingle.localAudio = stream;
RTC.attachMediaStream($('#localAudio'), stream);
document.getElementById('localAudio').autoplay = true;
document.getElementById('localAudio').volume = 0;
}
function change_local_video(stream, flipX) {
connection.jingle.localVideo = stream;
var localVideo = document.createElement('video');
localVideo.id = 'localVideo_' + stream.id;
localVideo.autoplay = true;
localVideo.volume = 0; // is it required if audio is separated ?
localVideo.oncontextmenu = function () { return false; };
var localVideoContainer = document.getElementById('localVideoWrapper');
localVideoContainer.appendChild(localVideo);
var localVideoSelector = $('#' + localVideo.id);
// Add click handler
localVideoSelector.click(function () {
handleVideoThumbClicked(localVideo.src);
});
// Add stream ended handler
stream.onended = function () {
localVideoContainer.removeChild(localVideo);
checkChangeLargeVideo(localVideo.src);
};
// Flip video x axis if needed
flipXLocalVideo = flipX;
if (flipX) {
localVideoSelector.addClass("flipVideoX");
}
// Attach WebRTC stream
RTC.attachMediaStream(localVideoSelector, stream);
localVideoSrc = localVideo.src;
updateLargeVideo(localVideoSrc, 0);
}
$(document).bind('remotestreamadded.jingle', function (event, data, sid) {
function waitForRemoteVideo(selector, sid, ssrc) {
if (selector.removed) {
console.warn("media removed before had started", selector);
return;
}
var sess = connection.jingle.sessions[sid];
if (data.stream.id === 'mixedmslabel') return;
var videoTracks = data.stream.getVideoTracks();
// console.log("waiting..", videoTracks, selector[0]);
if (videoTracks.length === 0 || selector[0].currentTime > 0) {
RTC.attachMediaStream(selector, data.stream); // FIXME: why do i have to do this for FF?
// FIXME: add a class that will associate peer Jid, video.src, it's ssrc and video type
// in order to get rid of too many maps
if (ssrc) {
videoSrcToSsrc[sel.attr('src')] = ssrc;
} else {
console.warn("No ssrc given for video", sel);
}
$(document).trigger('callactive.jingle', [selector, sid]);
console.log('waitForremotevideo', sess.peerconnection.iceConnectionState, sess.peerconnection.signalingState);
} else {
setTimeout(function () { waitForRemoteVideo(selector, sid, ssrc); }, 250);
}
}
var sess = connection.jingle.sessions[sid];
var thessrc;
// look up an associated JID for a stream id
if (data.stream.id.indexOf('mixedmslabel') === -1) {
var ssrclines = SDPUtil.find_lines(sess.peerconnection.remoteDescription.sdp, 'a=ssrc');
ssrclines = ssrclines.filter(function (line) {
return line.indexOf('mslabel:' + data.stream.label) !== -1;
});
if (ssrclines.length) {
thessrc = ssrclines[0].substring(7).split(' ')[0];
// ok to overwrite the one from focus? might save work in colibri.js
console.log('associated jid', ssrc2jid[thessrc], data.peerjid);
if (ssrc2jid[thessrc]) {
data.peerjid = ssrc2jid[thessrc];
}
}
}
var container;
var remotes = document.getElementById('remoteVideos');
if (data.peerjid) {
container = document.getElementById(
'participant_' + Strophe.getResourceFromJid(data.peerjid));
if (!container) {
console.error('no container for', data.peerjid);
} else {
//console.log('found container for', data.peerjid);
}
} else {
if (data.stream.id !== 'mixedmslabel') {
console.error('can not associate stream', data.stream.id, 'with a participant');
// We don't want to add it here since it will cause troubles
return;
}
// FIXME: for the mixed ms we dont need a video -- currently
container = document.createElement('span');
container.className = 'videocontainer';
remotes.appendChild(container);
Util.playSoundNotification('userJoined');
}
var isVideo = data.stream.getVideoTracks().length > 0;
var vid = isVideo ? document.createElement('video') : document.createElement('audio');
var id = (isVideo ? 'remoteVideo_' : 'remoteAudio_') + sid + '_' + data.stream.id;
vid.id = id;
vid.autoplay = true;
vid.oncontextmenu = function () { return false; };
container.appendChild(vid);
// TODO: make mixedstream display:none via css?
if (id.indexOf('mixedmslabel') !== -1) {
container.id = 'mixedstream';
$(container).hide();
}
var sel = $('#' + id);
sel.hide();
RTC.attachMediaStream(sel, data.stream);
if (isVideo) {
waitForRemoteVideo(sel, sid, thessrc);
}
data.stream.onended = function () {
console.log('stream ended', this.id);
// Mark video as removed to cancel waiting loop(if video is removed before has started)
sel.removed = true;
sel.remove();
var audioCount = $('#' + container.id + '>audio').length;
var videoCount = $('#' + container.id + '>video').length;
if (!audioCount && !videoCount) {
console.log("Remove whole user");
// Remove whole container
container.remove();
Util.playSoundNotification('userLeft');
resizeThumbnails();
}
checkChangeLargeVideo(vid.src);
};
// Add click handler
sel.click(function () {
handleVideoThumbClicked(vid.src);
});
// an attempt to work around https://github.com/jitsi/jitmeet/issues/32
if (isVideo &&
data.peerjid && sess.peerjid === data.peerjid &&
data.stream.getVideoTracks().length === 0 &&
connection.jingle.localVideo.getVideoTracks().length > 0) {
//
window.setTimeout(function () {
sendKeyframe(sess.peerconnection);
}, 3000);
}
});
function handleVideoThumbClicked(videoSrc) {
$(document).trigger("video.selected", [false]);
updateLargeVideo(videoSrc, 1);
$('audio').each(function (idx, el) {
if (el.id.indexOf('mixedmslabel') !== -1) {
el.volume = 0;
el.volume = 1;
}
});
}
/**
* Checks if removed video is currently displayed and tries to display another one instead.
* @param removedVideoSrc src stream identifier of the video.
*/
function checkChangeLargeVideo(removedVideoSrc) {
if (removedVideoSrc === $('#largeVideo').attr('src')) {
// this is currently displayed as large
// pick the last visible video in the row
// if nobody else is left, this picks the local video
var pick = $('#remoteVideos>span[id!="mixedstream"]:visible:last>video').get(0);
if (!pick) {
console.info("Last visible video no longer exists");
pick = $('#remoteVideos>span[id!="mixedstream"]>video').get(0);
if (!pick) {
// Try local video
console.info("Fallback to local video...");
pick = $('#remoteVideos>span>span>video').get(0);
}
}
// mute if localvideo
if (pick) {
updateLargeVideo(pick.src, pick.volume);
} else {
console.warn("Failed to elect large video");
}
}
}
// an attempt to work around https://github.com/jitsi/jitmeet/issues/32
function sendKeyframe(pc) {
console.log('sendkeyframe', pc.iceConnectionState);
if (pc.iceConnectionState !== 'connected') return; // safe...
pc.setRemoteDescription(
pc.remoteDescription,
function () {
pc.createAnswer(
function (modifiedAnswer) {
pc.setLocalDescription(
modifiedAnswer,
function () {
// noop
},
function (error) {
console.log('triggerKeyframe setLocalDescription failed', error);
}
);
},
function (error) {
console.log('triggerKeyframe createAnswer failed', error);
}
);
},
function (error) {
console.log('triggerKeyframe setRemoteDescription failed', error);
}
);
}
// really mute video, i.e. dont even send black frames
function muteVideo(pc, unmute) {
// FIXME: this probably needs another of those lovely state safeguards...
// which checks for iceconn == connected and sigstate == stable
pc.setRemoteDescription(pc.remoteDescription,
function () {
pc.createAnswer(
function (answer) {
var sdp = new SDP(answer.sdp);
if (sdp.media.length > 1) {
if (unmute)
sdp.media[1] = sdp.media[1].replace('a=recvonly', 'a=sendrecv');
else
sdp.media[1] = sdp.media[1].replace('a=sendrecv', 'a=recvonly');
sdp.raw = sdp.session + sdp.media.join('');
answer.sdp = sdp.raw;
}
pc.setLocalDescription(answer,
function () {
console.log('mute SLD ok');
},
function (error) {
console.log('mute SLD error');
}
);
},
function (error) {
console.log(error);
}
);
},
function (error) {
console.log('muteVideo SRD error');
}
);
}
$(document).bind('callincoming.jingle', function (event, sid) {
var sess = connection.jingle.sessions[sid];
// TODO: do we check activecall == null?
activecall = sess;
// TODO: check affiliation and/or role
console.log('emuc data for', sess.peerjid, connection.emuc.members[sess.peerjid]);
sess.usedrip = true; // not-so-naive trickle ice
sess.sendAnswer();
sess.accept();
});
$(document).bind('callactive.jingle', function (event, videoelem, sid) {
if (videoelem.attr('id').indexOf('mixedmslabel') === -1) {
// ignore mixedmslabela0 and v0
videoelem.show();
resizeThumbnails();
updateLargeVideo(videoelem.attr('src'), 1);
showFocusIndicator();
}
});
$(document).bind('callterminated.jingle', function (event, sid, reason) {
// FIXME
});
$(document).bind('setLocalDescription.jingle', function (event, sid) {
// put our ssrcs into presence so other clients can identify our stream
var sess = connection.jingle.sessions[sid];
var newssrcs = {};
var directions = {};
var localSDP = new SDP(sess.peerconnection.localDescription.sdp);
localSDP.media.forEach(function (media) {
var type = SDPUtil.parse_mline(media.split('\r\n')[0]).media;
if (SDPUtil.find_line(media, 'a=ssrc:')) {
// assumes a single local ssrc
var ssrc = SDPUtil.find_line(media, 'a=ssrc:').substring(7).split(' ')[0];
newssrcs[type] = ssrc;
directions[type] = (
SDPUtil.find_line(media, 'a=sendrecv') ||
SDPUtil.find_line(media, 'a=recvonly') ||
SDPUtil.find_line('a=sendonly') ||
SDPUtil.find_line('a=inactive') ||
'a=sendrecv').substr(2);
}
});
console.log('new ssrcs', newssrcs);
// Have to clear presence map to get rid of removed streams
connection.emuc.clearPresenceMedia();
var i = 0;
Object.keys(newssrcs).forEach(function (mtype) {
i++;
var type = mtype;
// Change video type to screen
if (mtype === 'video' && isUsingScreenStream) {
type = 'screen';
}
connection.emuc.addMediaToPresence(i, type, newssrcs[mtype], directions[mtype]);
});
if (i > 0) {
connection.emuc.sendPresence();
}
});
$(document).bind('joined.muc', function (event, jid, info) {
updateRoomUrl(window.location.href);
document.getElementById('localNick').appendChild(
document.createTextNode(Strophe.getResourceFromJid(jid) + ' (me)')
);
if (Object.keys(connection.emuc.members).length < 1) {
focus = new ColibriFocus(connection, config.hosts.bridge);
}
if (focus && config.etherpad_base) {
Etherpad.init();
}
showFocusIndicator();
// Once we've joined the muc show the toolbar
showToolbar();
var displayName = '';
if (info.displayName)
displayName = info.displayName + ' (me)';
showDisplayName('localVideoContainer', displayName);
});
$(document).bind('entered.muc', function (event, jid, info, pres) {
console.log('entered', jid, info);
console.log('is focus?' + focus ? 'true' : 'false');
// Add Peer's container
ensurePeerContainerExists(jid);
if (focus !== null) {
// FIXME: this should prepare the video
if (focus.confid === null) {
console.log('make new conference with', jid);
focus.makeConference(Object.keys(connection.emuc.members));
} else {
console.log('invite', jid, 'into conference');
focus.addNewParticipant(jid);
}
}
else if (sharedKey) {
updateLockButton();
}
});
$(document).bind('left.muc', function (event, jid) {
console.log('left', jid);
connection.jingle.terminateByJid(jid);
var container = document.getElementById('participant_' + Strophe.getResourceFromJid(jid));
if (container) {
// hide here, wait for video to close before removing
$(container).hide();
resizeThumbnails();
}
if (focus === null && connection.emuc.myroomjid === connection.emuc.list_members[0]) {
console.log('welcome to our new focus... myself');
focus = new ColibriFocus(connection, config.hosts.bridge);
if (Object.keys(connection.emuc.members).length > 0) {
focus.makeConference(Object.keys(connection.emuc.members));
}
$(document).trigger('focusechanged.muc', [focus]);
}
else if (focus && Object.keys(connection.emuc.members).length === 0) {
console.log('everyone left');
// FIXME: closing the connection is a hack to avoid some
// problemswith reinit
disposeConference();
focus = new ColibriFocus(connection, config.hosts.bridge);
}
if (connection.emuc.getPrezi(jid)) {
$(document).trigger('presentationremoved.muc', [jid, connection.emuc.getPrezi(jid)]);
}
});
$(document).bind('presence.muc', function (event, jid, info, pres) {
// Remove old ssrcs coming from the jid
Object.keys(ssrc2jid).forEach(function (ssrc) {
if (ssrc2jid[ssrc] == jid) {
delete ssrc2jid[ssrc];
}
if (ssrc2videoType == jid) {
delete ssrc2videoType[ssrc];
}
});
$(pres).find('>media[xmlns="http://estos.de/ns/mjs"]>source').each(function (idx, ssrc) {
//console.log(jid, 'assoc ssrc', ssrc.getAttribute('type'), ssrc.getAttribute('ssrc'));
var ssrcV = ssrc.getAttribute('ssrc');
ssrc2jid[ssrcV] = jid;
var type = ssrc.getAttribute('type');
ssrc2videoType[ssrcV] = type;
// might need to update the direction if participant just went from sendrecv to recvonly
if (type === 'video' || type === 'screen') {
var el = $('#participant_' + Strophe.getResourceFromJid(jid) + '>video');
switch (ssrc.getAttribute('direction')) {
case 'sendrecv':
el.show();
break;
case 'recvonly':
el.hide();
// FIXME: Check if we have to change large video
//checkChangeLargeVideo(el);
break;
}
}
});
if (info.displayName) {
if (jid === connection.emuc.myroomjid) {
showDisplayName('localVideoContainer', info.displayName + ' (me)');
} else {
ensurePeerContainerExists(jid);
showDisplayName('participant_' + Strophe.getResourceFromJid(jid), info.displayName);
}
}
});
$(document).bind('passwordrequired.muc', function (event, jid) {
console.log('on password required', jid);
$.prompt('<h2>Password required</h2>' +
'<input id="lockKey" type="text" placeholder="shared key" autofocus>', {
persistent: true,
buttons: { "Ok": true, "Cancel": false},
defaultButton: 1,
loaded: function (event) {
document.getElementById('lockKey').focus();
},
submit: function (e, v, m, f) {
if (v) {
var lockKey = document.getElementById('lockKey');
if (lockKey.value !== null) {
setSharedKey(lockKey.value);
connection.emuc.doJoin(jid, lockKey.value);
}
}
}
});
});
$(document).bind('audiomuted.muc', function (event, jid, isMuted) {
var videoSpanId = null;
if (jid === connection.emuc.myroomjid) {
videoSpanId = 'localVideoContainer';
} else {
ensurePeerContainerExists(jid);
videoSpanId = 'participant_' + Strophe.getResourceFromJid(jid);
}
if (videoSpanId)
showAudioIndicator(videoSpanId, isMuted);
});
$(document).bind('videomuted.muc', function (event, jid, isMuted) {
var videoSpanId = null;
if (jid === connection.emuc.myroomjid) {
videoSpanId = 'localVideoContainer';
} else {
ensurePeerContainerExists(jid);
videoSpanId = 'participant_' + Strophe.getResourceFromJid(jid);
}
if (videoSpanId)
showAudioIndicator(videoSpanId, isMuted);
});
/**
* Updates the large video with the given new video source.
*/
function updateLargeVideo(newSrc, vol) {
console.log('hover in', newSrc);
if ($('#largeVideo').attr('src') != newSrc) {
var isVisible = $('#largeVideo').is(':visible');
$('#largeVideo').fadeOut(300, function () {
$(this).attr('src', newSrc);
// Screen stream is already rotated
var flipX = (newSrc === localVideoSrc) && flipXLocalVideo;
var videoTransform = document.getElementById('largeVideo').style.webkitTransform;
if (flipX && videoTransform !== 'scaleX(-1)') {
document.getElementById('largeVideo').style.webkitTransform = "scaleX(-1)";
}
else if (!flipX && videoTransform === 'scaleX(-1)') {
document.getElementById('largeVideo').style.webkitTransform = "none";
}
// Change the way we'll be measuring and positioning large video
var isDesktop = isVideoSrcDesktop(newSrc);
getVideoSize = isDesktop ? getDesktopVideoSize : getCameraVideoSize;
getVideoPosition = isDesktop ? getDesktopVideoPosition : getCameraVideoPosition;
if (isVisible)
$(this).fadeIn(300);
});
}
}
/**
* Checks if video identified by given src is desktop stream.
* @param videoSrc eg. blob:https%3A//pawel.jitsi.net/9a46e0bd-131e-4d18-9c14-a9264e8db395
* @returns {boolean}
*/
function isVideoSrcDesktop(videoSrc) {
// FIXME: fix this mapping mess...
// figure out if large video is desktop stream or just a camera
var isDesktop = false;
if (localVideoSrc === videoSrc) {
// local video
isDesktop = isUsingScreenStream;
} else {
// Do we have associations...
var videoSsrc = videoSrcToSsrc[videoSrc];
if (videoSsrc) {
var videoType = ssrc2videoType[videoSsrc];
if (videoType) {
// Finally there...
isDesktop = videoType === 'screen';
} else {
console.error("No video type for ssrc: " + videoSsrc);
}
} else {
console.error("No ssrc for src: " + videoSrc);
}
}
return isDesktop;
}
/**
* Shows/hides the large video.
*/
function setLargeVideoVisible(isVisible) {
if (isVisible) {
$('#largeVideo').css({visibility: 'visible'});
$('.watermark').css({visibility: 'visible'});
}
else {
$('#largeVideo').css({visibility: 'hidden'});
$('.watermark').css({visibility: 'hidden'});
}
}
function getConferenceHandler() {
return focus ? focus : activecall;
}
function toggleVideo() {
if (!(connection && connection.jingle.localVideo))
return;
var sess = getConferenceHandler();
if (sess) {
sess.toggleVideoMute(
function (isMuted) {
if (isMuted) {
$('#video').removeClass("icon-camera");
$('#video').addClass("icon-camera icon-camera-disabled");
} else {
$('#video').removeClass("icon-camera icon-camera-disabled");
$('#video').addClass("icon-camera");
}
}
);
}
sess = focus || activecall;
if (!sess) {
return;
}
sess.pendingop = ismuted ? 'unmute' : 'mute';
// connection.emuc.addVideoInfoToPresence(!ismuted);
// connection.emuc.sendPresence();
sess.modifySources();
}
/**
* Mutes / unmutes audio for the local participant.
*/
function toggleAudio() {
if (!(connection && connection.jingle.localAudio))
return;
var localAudio = connection.jingle.localAudio;
for (var idx = 0; idx < localAudio.getAudioTracks().length; idx++) {
var audioEnabled = localAudio.getAudioTracks()[idx].enabled;
localAudio.getAudioTracks()[idx].enabled = !audioEnabled;
connection.emuc.addAudioInfoToPresence(audioEnabled); //isMuted is the opposite of audioEnabled
connection.emuc.sendPresence();
}
}
/**
* Positions the large video.
*
* @param videoWidth the stream video width
* @param videoHeight the stream video height
*/
var positionLarge = function (videoWidth, videoHeight) {
var videoSpaceWidth = $('#videospace').width();
var videoSpaceHeight = window.innerHeight;
var videoSize = getVideoSize(videoWidth,
videoHeight,
videoSpaceWidth,
videoSpaceHeight);
var largeVideoWidth = videoSize[0];
var largeVideoHeight = videoSize[1];
var videoPosition = getVideoPosition(largeVideoWidth,
largeVideoHeight,
videoSpaceWidth,
videoSpaceHeight);
var horizontalIndent = videoPosition[0];
var verticalIndent = videoPosition[1];
positionVideo($('#largeVideo'),
largeVideoWidth,
largeVideoHeight,
horizontalIndent, verticalIndent);
};
/**
* Returns an array of the video horizontal and vertical indents,
* so that if fits its parent.
*
* @return an array with 2 elements, the horizontal indent and the vertical
* indent
*/
function getCameraVideoPosition(videoWidth,
videoHeight,
videoSpaceWidth,
videoSpaceHeight) {
// Parent height isn't completely calculated when we position the video in
// full screen mode and this is why we use the screen height in this case.
// Need to think it further at some point and implement it properly.
var isFullScreen = document.fullScreen ||
document.mozFullScreen ||
document.webkitIsFullScreen;
if (isFullScreen)
videoSpaceHeight = window.innerHeight;
var horizontalIndent = (videoSpaceWidth - videoWidth) / 2;
var verticalIndent = (videoSpaceHeight - videoHeight) / 2;
return [horizontalIndent, verticalIndent];
}
/**
* Returns an array of the video horizontal and vertical indents.
* Centers horizontally and top aligns vertically.
*
* @return an array with 2 elements, the horizontal indent and the vertical
* indent
*/
function getDesktopVideoPosition(videoWidth,
videoHeight,
videoSpaceWidth,
videoSpaceHeight) {
var horizontalIndent = (videoSpaceWidth - videoWidth) / 2;
var verticalIndent = 0;// Top aligned
return [horizontalIndent, verticalIndent];
}
/**
* Returns an array of the video dimensions, so that it covers the screen.
* It leaves no empty areas, but some parts of the video might not be visible.
*
* @return an array with 2 elements, the video width and the video height
*/
function getCameraVideoSize(videoWidth,
videoHeight,
videoSpaceWidth,
videoSpaceHeight) {
if (!videoWidth)
videoWidth = currentVideoWidth;
if (!videoHeight)
videoHeight = currentVideoHeight;
var aspectRatio = videoWidth / videoHeight;
var availableWidth = Math.max(videoWidth, videoSpaceWidth);
var availableHeight = Math.max(videoHeight, videoSpaceHeight);
if (availableWidth / aspectRatio < videoSpaceHeight) {
availableHeight = videoSpaceHeight;
availableWidth = availableHeight * aspectRatio;
}
if (availableHeight * aspectRatio < videoSpaceWidth) {
availableWidth = videoSpaceWidth;
availableHeight = availableWidth / aspectRatio;
}
return [availableWidth, availableHeight];
}
/**
* Returns an array of the video dimensions, so that it keeps it's aspect ratio and fits available area with it's
* larger dimension. This method ensures that whole video will be visible and can leave empty areas.
*
* @return an array with 2 elements, the video width and the video height
*/
function getDesktopVideoSize(videoWidth,
videoHeight,
videoSpaceWidth,
videoSpaceHeight) {
if (!videoWidth)
videoWidth = currentVideoWidth;
if (!videoHeight)
videoHeight = currentVideoHeight;
var aspectRatio = videoWidth / videoHeight;
var availableWidth = Math.max(videoWidth, videoSpaceWidth);
var availableHeight = Math.max(videoHeight, videoSpaceHeight);
videoSpaceHeight -= $('#remoteVideos').outerHeight();
if (availableWidth / aspectRatio >= videoSpaceHeight)
{
availableHeight = videoSpaceHeight;
availableWidth = availableHeight * aspectRatio;
}
if (availableHeight * aspectRatio >= videoSpaceWidth)
{
availableWidth = videoSpaceWidth;
availableHeight = availableWidth / aspectRatio;
}
return [availableWidth, availableHeight];
}
/**
* Sets the size and position of the given video element.
*
* @param video the video element to position
* @param width the desired video width
* @param height the desired video height
* @param horizontalIndent the left and right indent
* @param verticalIndent the top and bottom indent
*/
function positionVideo(video,
width,
height,
horizontalIndent,
verticalIndent) {
video.width(width);
video.height(height);
video.css({ top: verticalIndent + 'px',
bottom: verticalIndent + 'px',