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compiled.js
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compiled.js
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(function(){function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c="function"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);var a=new Error("Cannot find module '"+i+"'");throw a.code="MODULE_NOT_FOUND",a}var p=n[i]={exports:{}};e[i][0].call(p.exports,function(r){var n=e[i][1][r];return o(n||r)},p,p.exports,r,e,n,t)}return n[i].exports}for(var u="function"==typeof require&&require,i=0;i<t.length;i++)o(t[i]);return o}return r})()({1:[function(require,module,exports){
/*
* Draws an Ascii string onto a canvas element
*/
var charString = "$@B%8&WM#*oahkbdpqwmZO0QLCJUYXzcvunxrjft/\\|()1{}[]?-_+~<>i!lI;:,\"^`'. "
.split("").reverse().join("");
var height = 512; // bigger here = sharper edges on the characters
var block = "█";
var AsciiGradient = function(){
var canvas = document.createElement('canvas');
var context = canvas.getContext('2d');
context.font = height + 'px monospace';
metrics = context.measureText('i');
canvas = document.createElement('canvas');
canvas.height = height * 9/10;
canvas.width = metrics.width * charString.length;
// canvas.height =512;
// canvas.width =512;
context = canvas.getContext('2d');
context.fillStyle = 'black';
context.fillRect(0,0,canvas.width,canvas.height);
context.font = height + 'px monospace';
context.fillStyle = 'white';
// yOffset is scaled so that it is 24 pixels at a height of 128.
var yOffset = 24 * height / 128;
context.fillText(charString, 0, canvas.height - yOffset);
this.canvas = canvas;
this.numChars = charString.length;
//document.body.appendChild(canvas);
}
module.exports = AsciiGradient;
},{}],2:[function(require,module,exports){
/* Factory pattern for creating effects
http://javascript.info/tutorial/factory-constructor-pattern
*/
var ascii = require('./AsciiGradient.js');
var t;
function EffectChain(type, renderer, texture){
// Throw an error if no constructor for the given automobile
//return eval("new " + type+"("+renderer+")");
var newEff = eval("new "+type+"(renderer, texture)");
return newEff;
}
var RgbDots = function(renderer, texture){
console.log("rgb called");
this.composer = new THREE.EffectComposer( renderer );
this.composer.addPass( new THREE.TexturePass( texture, 1.0 ));
this.dotScreenEffect = new THREE.ShaderPass( THREE.DotScreenShader );
this.dotScreenEffect.uniforms[ 'scale' ].value = 0.8;
this.composer.addPass( this.dotScreenEffect );
this.rgbEffect = new THREE.ShaderPass( THREE.RGBShiftShader );
this.rgbEffect.uniforms[ 'amount' ].value = 0.0015;
this.rgbEffect.renderToScreen = true;
this.composer.addPass( this.rgbEffect);
}
RgbDots.prototype.render = function(x, y){
//this.texture.needsUpdate = true;
this.dotScreenEffect.uniforms[ 'scale' ].value = x*3 ;
this.rgbEffect.uniforms[ 'amount' ].value = y ;
this.composer.render();
}
var Kaleidoscope = function(renderer, texture){
this.composer = new THREE.EffectComposer( renderer );
this.composer.addPass( new THREE.TexturePass( texture, 1.0 ));
this.KaleidoEffect = new THREE.ShaderPass( THREE.KaleidoShader);
//this.KaleidoEffect.renderToScreen = true;
this.composer.addPass( this.KaleidoEffect);
this.ColorEffect = new THREE.ShaderPass( THREE.HueSaturationShader);
this.ColorEffect.renderToScreen = true;
this.composer.addPass( this.ColorEffect);
}
Kaleidoscope.prototype.render = function(x, y, frame){
var sides = Math.ceil(x*10);
this.KaleidoEffect.uniforms[ 'sides' ].value = x*7;
this.KaleidoEffect.uniforms[ 'offset' ].value = y*8;
this.ColorEffect.uniforms[ 'hue' ].value = Math.cos(frame*0.01);
this.composer.render();
}
var KaleidoColor = function(renderer, texture){
this.composer = new THREE.EffectComposer( renderer );
this.composer.addPass( new THREE.TexturePass( texture, 1.0 ));
this.KaleidoEffect = new THREE.ShaderPass( THREE.KaleidoWarpShader);
//this.KaleidoEffect.renderToScreen = true;
this.composer.addPass( this.KaleidoEffect);
this.ColorEffect = new THREE.ShaderPass( THREE.ColorEffectShader);
//this.ColorEffect.uniforms[ 'saturation' ].value = 1.0;
this.ColorEffect.renderToScreen = true;
this.composer.addPass( this.ColorEffect);
}
KaleidoColor.prototype.render = function(x, y, frame){
var sides = Math.ceil(x*10);
this.KaleidoEffect.uniforms[ 'sides' ].value = x*7;
this.KaleidoEffect.uniforms[ 'offset' ].value = y*6;
this.ColorEffect.uniforms[ 'hue' ].value = Math.cos(frame*0.004);
this.composer.render();
}
var Film = function(renderer, texture){
this.composer = new THREE.EffectComposer( renderer );
this.composer.addPass( new THREE.TexturePass( texture, 1.0 ));
this.rgbEffect = new THREE.ShaderPass( THREE.ColorExperimentShader );
this.rgbEffect.uniforms[ 'amount' ].value = 0.0015;
//this.rgbEffect.renderToScreen = true;
this.Experiment = new THREE.ShaderPass( THREE.HueSaturationShader);
this.Experiment.renderToScreen = true;
this.composer.addPass( this.rgbEffect);
this.composer.addPass( this.Experiment );
}
Film.prototype.render = function(x, y){
this.rgbEffect.uniforms[ 'amount' ].value = 0.5-x;
this.Experiment.uniforms[ 'hue' ].value = y*2.0 - 1.0;
// scanlines effect intensity value (0 = no effect, 1 = full effect)
this.composer.render();
}
var Difference = function(renderer, texture){
this.composer = new THREE.EffectComposer( renderer );
this.composer.addPass( new THREE.TexturePass( texture, 1.0 ));
this.Difference = new THREE.ShaderPass( THREE.DifferenceMirrorShader);
//this.Difference.renderToScreen = true;
this.Contrast = new THREE.ShaderPass( THREE.BrightnessContrastShader);
this.Contrast.uniforms['contrast'].value = 0.0;
this.Contrast.uniforms['brightness'].value = 0.2;
this.composer.addPass( this.Contrast );
this.composer.addPass( this.Difference);
this.Experiment = new THREE.ShaderPass( THREE.HueSaturationShader);
this.Experiment.renderToScreen = true;
this.composer.addPass( this.Experiment );
}
Difference.prototype.render = function(x, y){
//this.Difference.uniforms[ 'sides' ].value = x*10;
this.Experiment.uniforms[ 'hue' ].value = x*2.0 - 1.0;
this.Contrast.uniforms['contrast'].value = y;
//this.Contrast.uniforms['brightness'].value = y*2.0 - 1.0;
//this.Difference.uniforms[ 'mixRatio' ].value = y;
this.composer.render();
}
var Ascii = function(renderer, texture){
var characters = new ascii();
// characters.canvas.width = characters.canvas.height = 128;
//document.body.appendChild(characters.canvas);
//t = initTexture(characters.canvas);
t= new THREE.Texture( characters.canvas);
//console.log(t);
t.needsUpdate=true;
var woodTexture = THREE.ImageUtils.loadTexture( 'textures/crate.gif' );
this.composer = new THREE.EffectComposer( renderer );
this.contrast = new THREE.ShaderPass( THREE.BrightnessContrastShader);
this.contrast.uniforms['contrast'].value = 0.7;
this.composer.addPass( new THREE.TexturePass( texture, 1.0 ));
this.composer.addPass( this.contrast );
this.Ascii = new THREE.ShaderPass( THREE.AsciiShader);
this.Ascii.uniforms['tDiffuse2'].value = t;
this.Ascii.renderToScreen = true;
this.Ascii.uniforms['numChars'].value = characters.numChars;
this.composer.addPass( this.Ascii);
}
Ascii.prototype.render = function(x, y){
var cols = Math.floor(x * 150);
// tex.needsUpdate = true;
this.Ascii.uniforms[ 'rows' ].value = cols * window.innerHeight / window.innerWidth;
this.Ascii.uniforms[ 'cols' ].value = cols;
this.contrast.uniforms ['contrast'].value = y;
this.composer.render();
}
var Checkerboard = function(renderer, texture){
this.composer = new THREE.EffectComposer( renderer );
this.composer.addPass( new THREE.TexturePass( texture, 1.0 ));
this.Checkerboard = new THREE.ShaderPass( THREE.CheckerboardShader);
this.Checkerboard.renderToScreen = true;
this.composer.addPass( this.Checkerboard);
}
Checkerboard.prototype.render = function(x, y){
this.Checkerboard.uniforms[ 'width' ].value = 2.0 - x*2.0;
this.Checkerboard.uniforms[ 'height' ].value = 2.0 - y*2.0;
//this.Difference.uniforms[ 'mixRatio' ].value = y;
this.composer.render();
}
var GlassWarp = function(renderer, texture){
this.composer = new THREE.EffectComposer( renderer );
this.composer.addPass( new THREE.TexturePass( texture, 1.0 ));
this.GlassWarp = new THREE.ShaderPass( THREE.GlassWarpShader);
this.GlassWarp.renderToScreen = true;
this.composer.addPass( this.GlassWarp);
//this.composer.addPass( contrast );
}
GlassWarp.prototype.render = function(x, y, frame){
this.GlassWarp.uniforms[ 'mouseX' ].value = x;
this.GlassWarp.uniforms[ 'mouseY' ].value = y;
this.GlassWarp.uniforms[ 'mag' ].value = 40*Math.sin(frame*0.002);
//this.ColorEffect.uniforms[ 'hue' ].value = Math.cos(frame*0.01);
//this.Difference.uniforms[ 'mixRatio' ].value = y;
this.composer.render();
}
var Experiment = function(renderer, texture){
this.composer = new THREE.EffectComposer( renderer );
this.composer.addPass( new THREE.TexturePass( texture, 1.0 ));
this.Experiment = new THREE.ShaderPass( THREE.HueSaturationShader);
this.Experiment.renderToScreen = true;
this.composer.addPass( this.Experiment );
}
Experiment.prototype.render = function(x, y, frame){
this.Experiment.uniforms[ 'hue' ].value = x*2.0 - 1.0;
this.Experiment.uniforms[ 'saturation' ].value = y*1.2 - 0.2;
//this.Experiment.uniforms[ 'mouseY' ].value = y;
//this.Difference.uniforms[ 'mixRatio' ].value = y;
this.composer.render();
}
function initTexture(canvas){
var tex = new THREE.Texture( canvas );
//needed because cant ensure that video has power of two dimensions
//tex.wrapS = THREE.ClampToEdgeWrapping;
// tex.wrapT = THREE.ClampToEdgeWrapping;
tex.minFilter = THREE.LinearFilter;
tex.magFilter = THREE.LinearFilter;
return tex;
}
module.exports = EffectChain;
},{"./AsciiGradient.js":1}],3:[function(require,module,exports){
var gifWidth = 600;
var GenerateGif = function(element, numFrames, effectChain){
document.getElementById("recording").src = "textures/player_record.png";
document.getElementById("recording").style.visibility = "visible";
this.canvas = document.createElement( 'canvas' );
this.canvas.width = gifWidth;
this.canvas.height = gifWidth*element.height/element.width;
this.context = this.canvas.getContext( '2d' );
this.numFrames = numFrames;
this.frameIndex = 0;
this.gif = new GIF({
workers: 2,
quality: 100
});
this.gif.on('finished', function(blob) {
document.getElementById("recording").style.visibility = "hidden";
window.open(URL.createObjectURL(blob));
});
}
GenerateGif.prototype.addFrame = function(element){
this.frameIndex++;
if(this.frameIndex >= this.numFrames){
this.finish();
return false;
} else {
this.context.drawImage( element, 0, 0, this.canvas.width, this.canvas.height);
this.gif.addFrame(this.canvas, {copy: true, delay:150});
this.frameIndex++;
return true;
}
};
GenerateGif.prototype.finish = function(){
document.getElementById("recording").src = "textures/ajax-loader.gif";
//renderingGif = false;
this.gif.render();
};
module.exports = GenerateGif;
},{}],4:[function(require,module,exports){
var renderer, effectChain, texture1, mouseX, mouseY, localVid;
var getUserMedia = require('getusermedia');
var EffectChain = require('./js/EffectChain.js');
var GenerateGif = require('./js/GenerateGif.js');
var gifFrames = 0;
var effects = ["KaleidoColor", "GlassWarp", "Film", "Ascii", "Difference", "Checkerboard" ];
var effectIndex = 0;
var renderingGif = false;
var currentGif;
var frameCount = 0;
mouseX = mouseY = 1;
var getImageData = false;
var localVid = document.getElementById('videoObj');
window.addEventListener("mousemove", onMouseMove);
window.addEventListener("mousedown", hideIntro);
document.onkeydown = checkKey;
window.addEventListener( 'resize', onWindowResize, false );
function askForMedia(){
//s = new LocalStream(localVid);
getUserMedia({video: true, audio: false}, function (err, stream) {
// if the browser doesn't support user media
// or the user says "no" the error gets passed
// as the first argument.
if (err) {
//console.log('failed ');
console.log(err);
/* if(err.name == "NotSupportedError"){
document.getElementById("blinky").innerHTML = "no camera available :[ try using Chrome or Firefox";
} else {*/
document.getElementById("blinky").innerHTML = "no camera available :[";
// }
} else {
// if (window.URL)
// { localVid.src = window.URL.createObjectURL(stream);
// }
localVid.srcObject = stream
console.log('got a stream', stream);
texture1 = initVideoTexture(localVid);
toggleInstructions();
document.getElementById("blinky").style.color = '#000';
effectIndex=0;
effectChain = EffectChain(effects[effectIndex], renderer, texture1);
setTimeout(function(){
if (document.getElementById("landing").style.visibility == "visible"){
toggleInstructions();
}
}, 5000);
}
});
}
function toggleInstructions(){
var toggle = document.getElementById("landing").style.visibility == "visible" ? "hidden": "visible";
document.getElementById("instructions").style.visibility = document.getElementById("landing").style.visibility = toggle;
}
initWebGL();
function initWebGL(){
renderer = new THREE.WebGLRenderer();
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
document.body.appendChild( renderer.domElement );
renderer.domElement.style.position = "absolute";
renderer.domElement.style.top = '0px';
renderer.domElement.style.left = '0px';
renderer.domElement.style.zIndex = '-20';
texture1 = THREE.ImageUtils.loadTexture( "textures/lines.png" );
initEffects();
render();
}
function initVideoTexture(vid){
var tex = new THREE.Texture( vid );
//needed because cant ensure that video has power of two dimensions
tex.wrapS = THREE.ClampToEdgeWrapping;
tex.wrapT = THREE.ClampToEdgeWrapping;
tex.minFilter = THREE.LinearFilter;
tex.magFilter = THREE.LinearFilter;
return tex;
}
function initEffects(){
effectChain = EffectChain(effects[effectIndex], renderer, texture1);
}
function onMouseMove(e){
mouseX = e.pageX;
mouseY = e.pageY;
}
function render() {
requestAnimationFrame( render );
frameCount++;
texture1.needsUpdate = true;
effectChain.render(mouseX/window.innerWidth, mouseY/window.innerHeight, frameCount);
if(renderingGif){
if(frameCount%5==0){
renderingGif = currentGif.addFrame(renderer.domElement);
}
}
}
function onWindowResize() {
renderer.setSize( window.innerWidth, window.innerHeight );
}
function hideIntro(){
var d = document.getElementById("landing");
var d_nested = document.getElementById("start");
var throwawayNode = d.removeChild(d_nested);
document.getElementById("instructions").style.visibility = "visible";
askForMedia();
window.removeEventListener("mousedown", hideIntro);
}
function checkKey(e){
e = e || window.event;
//Take screenshot
if(e.keyCode == 83){
effectChain.render(mouseX/window.innerWidth, mouseY/window.innerHeight, frameCount);
var imgData = renderer.domElement.toDataURL();
window.open(imgData);
//render gif
} else if(e.keyCode == 71){
renderingGif = true;
effectChain.render(mouseX/window.innerWidth, mouseY/window.innerHeight, frameCount);
currentGif = new GenerateGif(renderer.domElement, 50, effectChain);
//go to next effect
} else if (e.keyCode == '37') {
effectIndex--;
document.getElementById("instructions").style.visibility = "hidden";
document.getElementById("landing").style.visibility = "hidden";
if(effectIndex < 0) effectIndex = effects.length-1;
effectChain = EffectChain(effects[effectIndex], renderer, texture1);
}
//go to previous effect
else if (e.keyCode == '39') {
effectIndex++;
document.getElementById("instructions").style.visibility = "hidden";
document.getElementById("landing").style.visibility = "hidden";
if(effectIndex >= effects.length) effectIndex = 0;
effectChain = EffectChain(effects[effectIndex], renderer, texture1);
//toggle instructions
} else if (e.keyCode=='73'){
toggleInstructions();
}
}
},{"./js/EffectChain.js":2,"./js/GenerateGif.js":3,"getusermedia":5}],5:[function(require,module,exports){
// getUserMedia helper by @HenrikJoreteg used for navigator.getUserMedia shim
var adapter = require('webrtc-adapter');
module.exports = function (constraints, cb) {
var error;
var haveOpts = arguments.length === 2;
var defaultOpts = {video: true, audio: true};
var denied = 'PermissionDeniedError';
var altDenied = 'PERMISSION_DENIED';
var notSatisfied = 'ConstraintNotSatisfiedError';
// make constraints optional
if (!haveOpts) {
cb = constraints;
constraints = defaultOpts;
}
// treat lack of browser support like an error
if (typeof navigator === 'undefined' || !navigator.getUserMedia) {
// throw proper error per spec
error = new Error('MediaStreamError');
error.name = 'NotSupportedError';
// keep all callbacks async
return setTimeout(function () {
cb(error);
}, 0);
}
// normalize error handling when no media types are requested
if (!constraints.audio && !constraints.video) {
error = new Error('MediaStreamError');
error.name = 'NoMediaRequestedError';
// keep all callbacks async
return setTimeout(function () {
cb(error);
}, 0);
}
navigator.mediaDevices.getUserMedia(constraints)
.then(function (stream) {
cb(null, stream);
}).catch(function (err) {
var error;
// coerce into an error object since FF gives us a string
// there are only two valid names according to the spec
// we coerce all non-denied to "constraint not satisfied".
if (typeof err === 'string') {
error = new Error('MediaStreamError');
if (err === denied || err === altDenied) {
error.name = denied;
} else {
error.name = notSatisfied;
}
} else {
// if we get an error object make sure '.name' property is set
// according to spec: http://dev.w3.org/2011/webrtc/editor/getusermedia.html#navigatorusermediaerror-and-navigatorusermediaerrorcallback
error = err;
if (!error.name) {
// this is likely chrome which
// sets a property called "ERROR_DENIED" on the error object
// if so we make sure to set a name
if (error[denied]) {
err.name = denied;
} else {
err.name = notSatisfied;
}
}
}
cb(error);
});
};
},{"webrtc-adapter":7}],6:[function(require,module,exports){
/* eslint-env node */
'use strict';
// SDP helpers.
var SDPUtils = {};
// Generate an alphanumeric identifier for cname or mids.
// TODO: use UUIDs instead? https://gist.github.com/jed/982883
SDPUtils.generateIdentifier = function() {
return Math.random().toString(36).substr(2, 10);
};
// The RTCP CNAME used by all peerconnections from the same JS.
SDPUtils.localCName = SDPUtils.generateIdentifier();
// Splits SDP into lines, dealing with both CRLF and LF.
SDPUtils.splitLines = function(blob) {
return blob.trim().split('\n').map(function(line) {
return line.trim();
});
};
// Splits SDP into sessionpart and mediasections. Ensures CRLF.
SDPUtils.splitSections = function(blob) {
var parts = blob.split('\nm=');
return parts.map(function(part, index) {
return (index > 0 ? 'm=' + part : part).trim() + '\r\n';
});
};
// Returns lines that start with a certain prefix.
SDPUtils.matchPrefix = function(blob, prefix) {
return SDPUtils.splitLines(blob).filter(function(line) {
return line.indexOf(prefix) === 0;
});
};
// Parses an ICE candidate line. Sample input:
// candidate:702786350 2 udp 41819902 8.8.8.8 60769 typ relay raddr 8.8.8.8
// rport 55996"
SDPUtils.parseCandidate = function(line) {
var parts;
// Parse both variants.
if (line.indexOf('a=candidate:') === 0) {
parts = line.substring(12).split(' ');
} else {
parts = line.substring(10).split(' ');
}
var candidate = {
foundation: parts[0],
component: parts[1],
protocol: parts[2].toLowerCase(),
priority: parseInt(parts[3], 10),
ip: parts[4],
port: parseInt(parts[5], 10),
// skip parts[6] == 'typ'
type: parts[7]
};
for (var i = 8; i < parts.length; i += 2) {
switch (parts[i]) {
case 'raddr':
candidate.relatedAddress = parts[i + 1];
break;
case 'rport':
candidate.relatedPort = parseInt(parts[i + 1], 10);
break;
case 'tcptype':
candidate.tcpType = parts[i + 1];
break;
default: // extension handling, in particular ufrag
candidate[parts[i]] = parts[i + 1];
break;
}
}
return candidate;
};
// Translates a candidate object into SDP candidate attribute.
SDPUtils.writeCandidate = function(candidate) {
var sdp = [];
sdp.push(candidate.foundation);
sdp.push(candidate.component);
sdp.push(candidate.protocol.toUpperCase());
sdp.push(candidate.priority);
sdp.push(candidate.ip);
sdp.push(candidate.port);
var type = candidate.type;
sdp.push('typ');
sdp.push(type);
if (type !== 'host' && candidate.relatedAddress &&
candidate.relatedPort) {
sdp.push('raddr');
sdp.push(candidate.relatedAddress); // was: relAddr
sdp.push('rport');
sdp.push(candidate.relatedPort); // was: relPort
}
if (candidate.tcpType && candidate.protocol.toLowerCase() === 'tcp') {
sdp.push('tcptype');
sdp.push(candidate.tcpType);
}
return 'candidate:' + sdp.join(' ');
};
// Parses an ice-options line, returns an array of option tags.
// a=ice-options:foo bar
SDPUtils.parseIceOptions = function(line) {
return line.substr(14).split(' ');
}
// Parses an rtpmap line, returns RTCRtpCoddecParameters. Sample input:
// a=rtpmap:111 opus/48000/2
SDPUtils.parseRtpMap = function(line) {
var parts = line.substr(9).split(' ');
var parsed = {
payloadType: parseInt(parts.shift(), 10) // was: id
};
parts = parts[0].split('/');
parsed.name = parts[0];
parsed.clockRate = parseInt(parts[1], 10); // was: clockrate
// was: channels
parsed.numChannels = parts.length === 3 ? parseInt(parts[2], 10) : 1;
return parsed;
};
// Generate an a=rtpmap line from RTCRtpCodecCapability or
// RTCRtpCodecParameters.
SDPUtils.writeRtpMap = function(codec) {
var pt = codec.payloadType;
if (codec.preferredPayloadType !== undefined) {
pt = codec.preferredPayloadType;
}
return 'a=rtpmap:' + pt + ' ' + codec.name + '/' + codec.clockRate +
(codec.numChannels !== 1 ? '/' + codec.numChannels : '') + '\r\n';
};
// Parses an a=extmap line (headerextension from RFC 5285). Sample input:
// a=extmap:2 urn:ietf:params:rtp-hdrext:toffset
// a=extmap:2/sendonly urn:ietf:params:rtp-hdrext:toffset
SDPUtils.parseExtmap = function(line) {
var parts = line.substr(9).split(' ');
return {
id: parseInt(parts[0], 10),
direction: parts[0].indexOf('/') > 0 ? parts[0].split('/')[1] : 'sendrecv',
uri: parts[1]
};
};
// Generates a=extmap line from RTCRtpHeaderExtensionParameters or
// RTCRtpHeaderExtension.
SDPUtils.writeExtmap = function(headerExtension) {
return 'a=extmap:' + (headerExtension.id || headerExtension.preferredId) +
(headerExtension.direction && headerExtension.direction !== 'sendrecv'
? '/' + headerExtension.direction
: '') +
' ' + headerExtension.uri + '\r\n';
};
// Parses an ftmp line, returns dictionary. Sample input:
// a=fmtp:96 vbr=on;cng=on
// Also deals with vbr=on; cng=on
SDPUtils.parseFmtp = function(line) {
var parsed = {};
var kv;
var parts = line.substr(line.indexOf(' ') + 1).split(';');
for (var j = 0; j < parts.length; j++) {
kv = parts[j].trim().split('=');
parsed[kv[0].trim()] = kv[1];
}
return parsed;
};
// Generates an a=ftmp line from RTCRtpCodecCapability or RTCRtpCodecParameters.
SDPUtils.writeFmtp = function(codec) {
var line = '';
var pt = codec.payloadType;
if (codec.preferredPayloadType !== undefined) {
pt = codec.preferredPayloadType;
}
if (codec.parameters && Object.keys(codec.parameters).length) {
var params = [];
Object.keys(codec.parameters).forEach(function(param) {
params.push(param + '=' + codec.parameters[param]);
});
line += 'a=fmtp:' + pt + ' ' + params.join(';') + '\r\n';
}
return line;
};
// Parses an rtcp-fb line, returns RTCPRtcpFeedback object. Sample input:
// a=rtcp-fb:98 nack rpsi
SDPUtils.parseRtcpFb = function(line) {
var parts = line.substr(line.indexOf(' ') + 1).split(' ');
return {
type: parts.shift(),
parameter: parts.join(' ')
};
};
// Generate a=rtcp-fb lines from RTCRtpCodecCapability or RTCRtpCodecParameters.
SDPUtils.writeRtcpFb = function(codec) {
var lines = '';
var pt = codec.payloadType;
if (codec.preferredPayloadType !== undefined) {
pt = codec.preferredPayloadType;
}
if (codec.rtcpFeedback && codec.rtcpFeedback.length) {
// FIXME: special handling for trr-int?
codec.rtcpFeedback.forEach(function(fb) {
lines += 'a=rtcp-fb:' + pt + ' ' + fb.type +
(fb.parameter && fb.parameter.length ? ' ' + fb.parameter : '') +
'\r\n';
});
}
return lines;
};
// Parses an RFC 5576 ssrc media attribute. Sample input:
// a=ssrc:3735928559 cname:something
SDPUtils.parseSsrcMedia = function(line) {
var sp = line.indexOf(' ');
var parts = {
ssrc: parseInt(line.substr(7, sp - 7), 10)
};
var colon = line.indexOf(':', sp);
if (colon > -1) {
parts.attribute = line.substr(sp + 1, colon - sp - 1);
parts.value = line.substr(colon + 1);
} else {
parts.attribute = line.substr(sp + 1);
}
return parts;
};
// Extracts the MID (RFC 5888) from a media section.
// returns the MID or undefined if no mid line was found.
SDPUtils.getMid = function(mediaSection) {
var mid = SDPUtils.matchPrefix(mediaSection, 'a=mid:')[0];
if (mid) {
return mid.substr(6);
}
}
SDPUtils.parseFingerprint = function(line) {
var parts = line.substr(14).split(' ');
return {
algorithm: parts[0].toLowerCase(), // algorithm is case-sensitive in Edge.
value: parts[1]
};
};
// Extracts DTLS parameters from SDP media section or sessionpart.
// FIXME: for consistency with other functions this should only
// get the fingerprint line as input. See also getIceParameters.
SDPUtils.getDtlsParameters = function(mediaSection, sessionpart) {
var lines = SDPUtils.matchPrefix(mediaSection + sessionpart,
'a=fingerprint:');
// Note: a=setup line is ignored since we use the 'auto' role.
// Note2: 'algorithm' is not case sensitive except in Edge.
return {
role: 'auto',
fingerprints: lines.map(SDPUtils.parseFingerprint)
};
};
// Serializes DTLS parameters to SDP.
SDPUtils.writeDtlsParameters = function(params, setupType) {
var sdp = 'a=setup:' + setupType + '\r\n';
params.fingerprints.forEach(function(fp) {
sdp += 'a=fingerprint:' + fp.algorithm + ' ' + fp.value + '\r\n';
});
return sdp;
};
// Parses ICE information from SDP media section or sessionpart.
// FIXME: for consistency with other functions this should only
// get the ice-ufrag and ice-pwd lines as input.
SDPUtils.getIceParameters = function(mediaSection, sessionpart) {
var lines = SDPUtils.splitLines(mediaSection);
// Search in session part, too.
lines = lines.concat(SDPUtils.splitLines(sessionpart));
var iceParameters = {
usernameFragment: lines.filter(function(line) {
return line.indexOf('a=ice-ufrag:') === 0;
})[0].substr(12),
password: lines.filter(function(line) {
return line.indexOf('a=ice-pwd:') === 0;
})[0].substr(10)
};
return iceParameters;
};
// Serializes ICE parameters to SDP.
SDPUtils.writeIceParameters = function(params) {
return 'a=ice-ufrag:' + params.usernameFragment + '\r\n' +
'a=ice-pwd:' + params.password + '\r\n';
};
// Parses the SDP media section and returns RTCRtpParameters.
SDPUtils.parseRtpParameters = function(mediaSection) {
var description = {
codecs: [],
headerExtensions: [],
fecMechanisms: [],
rtcp: []
};
var lines = SDPUtils.splitLines(mediaSection);
var mline = lines[0].split(' ');
for (var i = 3; i < mline.length; i++) { // find all codecs from mline[3..]
var pt = mline[i];
var rtpmapline = SDPUtils.matchPrefix(
mediaSection, 'a=rtpmap:' + pt + ' ')[0];
if (rtpmapline) {
var codec = SDPUtils.parseRtpMap(rtpmapline);
var fmtps = SDPUtils.matchPrefix(
mediaSection, 'a=fmtp:' + pt + ' ');
// Only the first a=fmtp:<pt> is considered.
codec.parameters = fmtps.length ? SDPUtils.parseFmtp(fmtps[0]) : {};
codec.rtcpFeedback = SDPUtils.matchPrefix(
mediaSection, 'a=rtcp-fb:' + pt + ' ')
.map(SDPUtils.parseRtcpFb);
description.codecs.push(codec);
// parse FEC mechanisms from rtpmap lines.
switch (codec.name.toUpperCase()) {
case 'RED':
case 'ULPFEC':
description.fecMechanisms.push(codec.name.toUpperCase());
break;
default: // only RED and ULPFEC are recognized as FEC mechanisms.
break;
}
}
}
SDPUtils.matchPrefix(mediaSection, 'a=extmap:').forEach(function(line) {
description.headerExtensions.push(SDPUtils.parseExtmap(line));
});
// FIXME: parse rtcp.
return description;
};
// Generates parts of the SDP media section describing the capabilities /
// parameters.
SDPUtils.writeRtpDescription = function(kind, caps) {
var sdp = '';
// Build the mline.
sdp += 'm=' + kind + ' ';
sdp += caps.codecs.length > 0 ? '9' : '0'; // reject if no codecs.
sdp += ' UDP/TLS/RTP/SAVPF ';
sdp += caps.codecs.map(function(codec) {
if (codec.preferredPayloadType !== undefined) {
return codec.preferredPayloadType;
}
return codec.payloadType;
}).join(' ') + '\r\n';
sdp += 'c=IN IP4 0.0.0.0\r\n';
sdp += 'a=rtcp:9 IN IP4 0.0.0.0\r\n';
// Add a=rtpmap lines for each codec. Also fmtp and rtcp-fb.
caps.codecs.forEach(function(codec) {
sdp += SDPUtils.writeRtpMap(codec);
sdp += SDPUtils.writeFmtp(codec);
sdp += SDPUtils.writeRtcpFb(codec);
});
var maxptime = 0;
caps.codecs.forEach(function(codec) {
if (codec.maxptime > maxptime) {
maxptime = codec.maxptime;
}
});
if (maxptime > 0) {
sdp += 'a=maxptime:' + maxptime + '\r\n';
}
sdp += 'a=rtcp-mux\r\n';
caps.headerExtensions.forEach(function(extension) {
sdp += SDPUtils.writeExtmap(extension);
});
// FIXME: write fecMechanisms.
return sdp;
};
// Parses the SDP media section and returns an array of
// RTCRtpEncodingParameters.
SDPUtils.parseRtpEncodingParameters = function(mediaSection) {
var encodingParameters = [];
var description = SDPUtils.parseRtpParameters(mediaSection);
var hasRed = description.fecMechanisms.indexOf('RED') !== -1;
var hasUlpfec = description.fecMechanisms.indexOf('ULPFEC') !== -1;
// filter a=ssrc:... cname:, ignore PlanB-msid
var ssrcs = SDPUtils.matchPrefix(mediaSection, 'a=ssrc:')
.map(function(line) {
return SDPUtils.parseSsrcMedia(line);
})
.filter(function(parts) {
return parts.attribute === 'cname';
});
var primarySsrc = ssrcs.length > 0 && ssrcs[0].ssrc;
var secondarySsrc;
var flows = SDPUtils.matchPrefix(mediaSection, 'a=ssrc-group:FID')
.map(function(line) {
var parts = line.split(' ');
parts.shift();
return parts.map(function(part) {
return parseInt(part, 10);
});
});
if (flows.length > 0 && flows[0].length > 1 && flows[0][0] === primarySsrc) {
secondarySsrc = flows[0][1];
}
description.codecs.forEach(function(codec) {
if (codec.name.toUpperCase() === 'RTX' && codec.parameters.apt) {
var encParam = {
ssrc: primarySsrc,
codecPayloadType: parseInt(codec.parameters.apt, 10),
rtx: {
ssrc: secondarySsrc
}
};
encodingParameters.push(encParam);
if (hasRed) {
encParam = JSON.parse(JSON.stringify(encParam));
encParam.fec = {
ssrc: secondarySsrc,
mechanism: hasUlpfec ? 'red+ulpfec' : 'red'
};
encodingParameters.push(encParam);
}
}
});
if (encodingParameters.length === 0 && primarySsrc) {
encodingParameters.push({
ssrc: primarySsrc
});
}
// we support both b=AS and b=TIAS but interpret AS as TIAS.
var bandwidth = SDPUtils.matchPrefix(mediaSection, 'b=');
if (bandwidth.length) {