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composer.js
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composer.js
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(function() {
var STOCK_AREA_HEIGHT = 140;
var PORT_RADIUS = 4;
var REMOVE_BUTTON_SIZE = 8;
var PATCH_WIDTH = 100;
var PATCH_HEIGHT = 80;
var PATCH_MARGIN = 10;
var MONITOR_WIDTH = 64;
var MONITOR_HEIGHT = 40;
var GAIN_SCALE = 100;
var Q_SCALE = 10000;
var DELAY_TIME_SCALE = 1000;
var ATTACK_SCALE = 1000;
var RELEASE_SCALE = 1000;
var PLAYBACK_RATE_SCALE = 100;
var FFT_SIZE = 1024;
var stage, stockArea, compositeArea, activeConnection;
var audioContext, micStream, mediaNode;
var freqBuffer = new Uint8Array(FFT_SIZE / 2);
var selectedPatch = null;
var nodeSpec = {
MediaElementAudioSource : {
label : 'media',
pos : 0,
maxInstance : 1,
build : function() { return mediaNode; }
},
MediaStreamAudioSource : {
label : 'microphone',
pos : 1,
maxInstance : Number.MAX_VALUE,
build : function() { return audioContext.createMediaStreamSource(micStream); }
},
Oscillator : {
label : 'oscillator',
pos : 2,
maxInstance : Number.MAX_VALUE,
build : function() {
var node = audioContext.createOscillator();
node.start(0);
return node;
}
},
AudioBufferSource : {
label : 'buffer',
pos : null,
maxInstance : Number.MAX_VALUE,
build : function() {
var node = audioContext.createBufferSource();
node.loop = true;
return node;
}
},
Gain : {
label : 'gain',
pos : 3,
maxInstance : Number.MAX_VALUE,
build : function() { return audioContext.createGain(); }
},
ChannelSplitter : {
label : 'split',
pos : 4,
maxInstance : Number.MAX_VALUE,
build : function() { return audioContext.createChannelSplitter(); }
},
ChannelMerger : {
label : 'merge',
pos : 5,
maxInstance : Number.MAX_VALUE,
build : function() { return audioContext.createChannelMerger(); }
},
BiquadFilter : {
label : 'biquad',
pos : 6,
maxInstance : Number.MAX_VALUE,
build : function() { return audioContext.createBiquadFilter(); }
},
Convolver : {
label : 'convolve',
pos : 7,
maxInstance : Number.MAX_VALUE,
build : function() {
var node = audioContext.createConvolver();
node.buffer = impulseResponse(4, 4, false);
return node;
}
},
Delay : {
label : 'delay',
pos : 8,
maxInstance : Number.MAX_VALUE,
build : function() { return audioContext.createDelay(5); }
},
DynamicsCompressor : {
label : 'compress',
pos : 9,
maxInstance : Number.MAX_VALUE,
build : function() { return audioContext.createDynamicsCompressor(); }
},
WaveShaper : {
label : 'shaper',
pos : 10,
maxInstance : Number.MAX_VALUE,
build : function() {
var node = audioContext.createWaveShaper();
node.curve = makeDistortionCurve(400);
return node;
}
},
Analyser: {
label : 'analyser',
pos : 11,
maxInstance : Number.MAX_VALUE,
build : function() {
var node = audioContext.createAnalyser();
node.fftSize = FFT_SIZE;
return node;
}
},
AudioDestination : {
label : 'dest',
pos : 12,
maxInstance : 1,
build : function() { return audioContext.destination; }
}
};
var channelLabels = ['L', 'R', 'C', 'LFE', 'SL', 'SR'];
Rectangle.prototype.includes = function(x, y) {
return this.x <= x && x < this.x + this.width && this.y <= y && y < this.y + this.height;
}
function setupStage() {
var workspace;
function onDragOver(event) {
var eventX = event.hasOwnProperty('offsetX') ? event.offsetX : event.layerX;
var eventY = event.hasOwnProperty('offsetX') ? event.offsetY : event.layerY;
var local = compositeArea.globalToLocal(eventX, eventY);
if (compositeArea.getBounds().includes(local.x, local.y)) {
event.dataTransfer.dropEffect = 'copy';
}
event.stopPropagation();
event.preventDefault();
}
function onDrop(event) {
var files = event.dataTransfer.files;
var eventX = event.hasOwnProperty('offsetX') ? event.offsetX : event.layerX;
var eventY = event.hasOwnProperty('offsetX') ? event.offsetY : event.layerY;
var areaLocal, patchesLocal, patch, reader, loading;
areaLocal = compositeArea.globalToLocal(eventX, eventY);
if (0 < files.length && files[0].type.match('audio/.*') &&
compositeArea.getBounds().includes(areaLocal.x, areaLocal.y)) {
patchesLocal = compositeArea.patches.globalToLocal(eventX, eventY);
patch = Patch('AudioBufferSource', 'composite');
patch.x = patchesLocal.x;
patch.y = patchesLocal.y;
patch.mouseEnabled = false;
compositeArea.patches.addChild(patch);
loading = new Text('loading', 'normal 16px sans-serif', '#fff');
loading.x = -(patch.getBounds().width - loading.getBounds().width) / 2;
loading.y = -loading.getBounds().height / 2;
loading.fadeOut = function() {
Tween.get(loading).to({alpha: 0}, 200).call(loading.fadeIn);
}
loading.fadeIn = function() {
Tween.get(loading).to({alpha: 1}, 200).call(loading.fadeOut);
}
loading.fadeOut();
patch.addChild(loading);
reader = new FileReader();
reader.readAsArrayBuffer(files[0]);
reader.onload = function(event) {
audioContext.decodeAudioData(
event.target.result,
function(buffer) {
patch.removeChild(loading);
patch.mouseEnabled = true;
patch.node.buffer = buffer;
patch.node.start(0);
},
function() {
console.log('decoding error.');
});
}
}
event.stopPropagation();
event.preventDefault();
}
window.AudioContext = window.AudioContext || window.webkitAudioContext;
audioContext = new AudioContext();
document.getElementById('music').play();
mediaNode = audioContext.createMediaElementSource(document.getElementById('music'));
workspace = document.getElementById('workspace');
stage = new Stage('mainStage');
stage.canvas.width = workspace.offsetWidth;
stage.canvas.height = workspace.offsetHeight;
stage.message = new Text('Drag and drop music file from desktop. Double click to disconnect.', '12px sans-serif', '#bbb');
stage.message.x = 3;
stage.message.y = 3;
stage.addChild(stage.message);
compositeArea = CompositeArea(stage.canvas.width, stage.canvas.height - STOCK_AREA_HEIGHT);
compositeArea.x = 0;
compositeArea.y = 0;
stage.addChild(compositeArea);
stockArea = StockArea(stage.canvas.width, STOCK_AREA_HEIGHT);
stockArea.x = 0;
stockArea.y = stage.canvas.height - STOCK_AREA_HEIGHT;
stage.addChild(stockArea);
Ticker.timingMode = Ticker.RAF;
Ticker.setFPS(60);
Ticker.addEventListener('tick', onTick);
stage.canvas.addEventListener('dragover', onDragOver);
stage.canvas.addEventListener('drop', onDrop);
window.addEventListener('resize', function(event) {
stage.canvas.width = workspace.offsetWidth;
stage.canvas.height = workspace.offsetHeight;
compositeArea.x = 0;
compositeArea.y = 0;
compositeArea.resize(stage.canvas.width, stage.canvas.height - STOCK_AREA_HEIGHT);
stockArea.x = 0;
stockArea.y = stage.canvas.height - STOCK_AREA_HEIGHT;
stockArea.resize(stage.canvas.width, STOCK_AREA_HEIGHT);
});
}
function setupComposition() {
var media, convolv, shaper, compress, analyser1, analyser2, analyser3, dest;
media = Patch('MediaElementAudioSource', 'composite');
media.x = compositeArea.getBounds().width / 2 - 3 * media.getBounds().width;
media.y = compositeArea.getBounds().height / 2;
compositeArea.patches.addChild(media);
dest = Patch('AudioDestination', 'composite');
dest.x = compositeArea.getBounds().width / 2 + 3 * dest.getBounds().width;
dest.y = compositeArea.getBounds().height / 2;
compositeArea.patches.addChild(dest);
convolve = Patch('Convolver', 'composite');
convolve.x = compositeArea.getBounds().width / 2 - convolve.getBounds().width;
convolve.y = compositeArea.getBounds().height / 2 - 2 * convolve.getBounds().height;
compositeArea.patches.addChild(convolve);
shaper = Patch('WaveShaper', 'composite');
shaper.x = compositeArea.getBounds().width / 2 - shaper.getBounds().width;
shaper.y = compositeArea.getBounds().height / 2 + 2 * shaper.getBounds().height;
compositeArea.patches.addChild(shaper);
compress = Patch('DynamicsCompressor', 'composite');
compress.x = compositeArea.getBounds().width / 2 - compress.getBounds().width;
compress.y = compositeArea.getBounds().height / 2;
compress.node.threshold.value = -60;
compositeArea.patches.addChild(compress);
analyser1 = Patch('Analyser', 'composite');
analyser1.x = compositeArea.getBounds().width / 2 + 1 * analyser1.getBounds().width;
analyser1.y = compositeArea.getBounds().height / 2;
compositeArea.patches.addChild(analyser1);
analyser2 = Patch('Analyser', 'composite');
analyser2.x = compositeArea.getBounds().width / 2 + 1 * analyser2.getBounds().width;
analyser2.y = compositeArea.getBounds().height / 2 - 2* analyser2.getBounds().height;
compositeArea.patches.addChild(analyser2);
analyser3 = Patch('Analyser', 'composite');
analyser3.x = compositeArea.getBounds().width / 2 + 1 * analyser3.getBounds().width;
analyser3.y = compositeArea.getBounds().height / 2 + 2 * analyser3.getBounds().height;
compositeArea.patches.addChild(analyser3);
media.outputPorts.children[0].connect(compress.inputPorts.children[0]);
compress.outputPorts.children[0].connect(analyser1.inputPorts.children[0]);
analyser1.outputPorts.children[0].connect(dest.inputPorts.children[0]);
media.outputPorts.children[0].connect(convolve.inputPorts.children[0]);
convolve.outputPorts.children[0].connect(analyser2.inputPorts.children[0]);
media.outputPorts.children[0].connect(shaper.inputPorts.children[0]);
shaper.outputPorts.children[0].connect(analyser3.inputPorts.children[0]);
}
function onTick(event) {
var delta = event.delta * 0.001;
compositeArea.update(delta);
stockArea.update(delta);
stage.update();
compositeArea.drawConnections();
}
function CompositeArea(width, height) {
var area, selectedPane = null;
var graphics = new createjs.Graphics();
var prevX, prevY, blinkFlag;
function getPatchUnderPoint(x, y) {
var patch, i, local, result = null;
for (i = 0; i < area.patches.getNumChildren(); i++) {
patch = area.patches.children[i];
local = area.localToLocal(x, y, patch);
if (patch.getBounds().includes(local.x, local.y)) {
result = patch;
break;
}
}
return result;
}
function onClick(event) {
var local, patch;
if (selectedPane) {
selectedPane.style.display = 'none';
}
local = area.globalToLocal(event.stageX, event.stageY);
patch = getPatchUnderPoint(local.x, local.y);
if (patch) {
selectedPane = document.querySelector('#' + nodeSpec[patch.nodeType].label + 'Params');
selectedPatch = patch;
refreshPane(patch);
} else {
selectedPane = null;
selectedPatch = null;
}
if (selectedPane) {
selectedPane.style.display = 'block';
}
event.preventDefault();
}
function onMouseDown(event) {
prevX = event.stageX;
prevY = event.stageY;
}
function onPressMove(event) {
area.patches.x += (event.stageX - prevX);
area.patches.y += (event.stageY - prevY);
prevX = event.stageX;
prevY = event.stageY;
}
function patchCount(type) {
return area.patches.children
.map(function(patch) { return patch.nodeType === type; })
.reduce(function(prev, curr) { return prev + curr; }, 0);
}
function update(delta) {
var i, j, patch;
var lineNum = MONITOR_WIDTH / 2, stride = freqBuffer.length / lineNum;
for (i = 0; i < compositeArea.patches.getNumChildren(); i++) {
patch = compositeArea.patches.children[i];
if (patch.nodeType === 'Analyser') {
patch.node.getByteFrequencyData(freqBuffer);
patch.monitor.graphics.clear().beginStroke('#ff6').setStrokeStyle(2);
for (j = 0; j < lineNum; j++) {
patch.monitor.graphics
.moveTo(2 * j + 1, MONITOR_HEIGHT)
.lineTo(2 * j + 1, MONITOR_HEIGHT * (1.0 - freqBuffer[stride * j] / 255.0));
}
}
}
}
function resize(width, height) {
area.setBounds(0, 0, width, height);
area.background.hitArea.graphics.beginFill('#000').drawRect(0, 0, width, height);
area.trashbox.x = width - 25;
area.trashbox.y = 5;
}
function drawConnections() {
var i, j, k, patch, inputPort, outputPort, op, ip;
graphics.clear();
if (activeConnection) {
drawConnection(graphics,
activeConnection.outputX,
activeConnection.outputY,
activeConnection.inputX,
activeConnection.inputY);
}
for (i = 0; i < compositeArea.patches.getNumChildren(); i++) {
patch = compositeArea.patches.children[i];
for (j = 0; j < patch.inputPorts.getNumChildren(); j++) {
inputPort = patch.inputPorts.children[j];
for (k = 0; k < inputPort.peers.length; k++) {
outputPort = inputPort.peers[k];
op = outputPort.localToGlobal(0, 0);
ip = inputPort.localToGlobal(0, 0);
drawConnection(graphics, op.x, op.y, ip.x, ip.y);
}
}
}
graphics.draw(stage.canvas.getContext('2d'));
}
area = new Container();
area.setBounds(0, 0, width, height);
area.getPatchUnderPoint = getPatchUnderPoint;
area.patchCount = patchCount;
area.update = update;
area.resize = resize;
area.drawConnections = drawConnections;
area.addEventListener('click', onClick);
area.addEventListener('mousedown', onMouseDown);
area.addEventListener('pressmove', onPressMove);
// This shape is needed for correctly tracking mouse event.
area.background = new Shape();
area.background.hitArea = new Shape();
area.background.hitArea.graphics.beginFill('#000').drawRect(0, 0, width, height);
area.addChild(area.background);
area.trashbox = new Bitmap('trashbox.png');
area.trashbox.x = width - 25;
area.trashbox.y = 5;
area.trashbox.startBlink = function() {
function fadeOut() {
if (blinkFlag) {
Tween.get(area.trashbox).to({alpha: 0}, 250).call(fadeIn);
} else {
area.trashbox.alpha = 1;
}
}
function fadeIn() {
if (blinkFlag) {
Tween.get(area.trashbox).to({alpha: 1}, 250).call(fadeOut);
} else {
area.trashbox.alpha = 1;
}
}
blinkFlag = true;
fadeOut();
};
area.trashbox.stopBlink = function() {
blinkFlag = false;
};
area.addChild(area.trashbox);
area.patches = new Container();
area.addChild(area.patches);
return area;
}
function StockArea(width, height) {
var area;
var i, patch, stockables;
var vx = 0, prevX;
var DECEL = 400;
var ARROW_ALPHA = 0.7;
function onMouseDown(event) {
vx = 0;
prevX = event.stageX;
event.stopPropagation();
}
function onPressMove(event) {
vx += 3.0 * (event.stageX - prevX);
prevX = event.stageX;
}
function update(delta) {
var areaWidth = area.getBounds().width, patchesWidth = area.patches.getBounds().width;
area.patches.x += delta * vx;
if (0 < vx) {
vx = Math.max(0, vx - DECEL * delta);
if (0 < area.patches.x) {
vx = 0;
area.patches.x = 0;
}
} else {
vx = Math.min(0, vx + DECEL * delta);
if (area.patches.x + patchesWidth < areaWidth) {
vx = 0;
area.patches.x = areaWidth - patchesWidth;
}
}
if (-10 <= area.patches.x && -10 > area.patches.prevX) {
Tween.get(area.leftArrow).to({alpha : 0}, 100);
}
if (-10 > area.patches.x && -10 <= area.patches.prevX) {
Tween.get(area.leftArrow).to({alpha : ARROW_ALPHA}, 100);
}
if (area.patches.x + patchesWidth < areaWidth + 10 &&
area.patches.prevX + patchesWidth >= areaWidth + 10) {
Tween.get(area.rightArrow).to({alpha : 0}, 100);
}
if (area.patches.x + patchesWidth >= areaWidth + 10 &&
area.patches.prevX + patchesWidth < areaWidth + 10) {
Tween.get(area.rightArrow).to({alpha : ARROW_ALPHA}, 100);
}
area.patches.prevX = area.patches.x;
}
function resize(width, height) {
area.setBounds(0, 0, width, height);
area.background.graphics.clear().beginFill('#888').drawRect(0, 0, width, height);
area.rightArrow.x = area.getBounds().width - 5;
area.rightArrow.y = area.getBounds().height / 2;
}
function getStockables() {
stockables = [];
for (type in nodeSpec) {
if (nodeSpec[type].pos !== null) {
stockables.push(type);
}
}
return stockables;
}
area = new Container();
area.update = update;
area.resize = resize;
area.setBounds(0, 0, width, height);
area.background = new Shape();
area.background.graphics.beginFill('#888').drawRect(0, 0, width, height);
area.background.alpha = 0.3;
area.addChild(area.background);
stockables = getStockables();
area.patches = new Container();
area.patches.x = 0;
area.patches.y = 0;
area.patches.prevX = 0;
area.patches.setBounds(0, 0, PATCH_MARGIN + stockables.length * (PATCH_WIDTH + PATCH_MARGIN), STOCK_AREA_HEIGHT);
area.addChild(area.patches);
area.rightArrow = new Shape();
area.rightArrow.graphics.beginFill('#fff').moveTo(0, 0).lineTo(-15, 15).lineTo(-15, -15);
area.rightArrow.alpha = ARROW_ALPHA;
area.rightArrow.x = area.getBounds().width - 5;
area.rightArrow.y = area.getBounds().height / 2;
area.addChild(area.rightArrow);
area.leftArrow = new Shape();
area.leftArrow.graphics.beginFill('#fff').moveTo(0, 0).lineTo(15, 15).lineTo(15, -15);
area.leftArrow.alpha = 0;
area.leftArrow.x = 5;
area.leftArrow.y = area.getBounds().height / 2;
area.addChild(area.leftArrow);
area.addEventListener('mousedown', onMouseDown);
area.addEventListener('pressmove', onPressMove);
for (i = 0; i < stockables.length; i++) {
patch = Patch(stockables[i], 'stock');
patch.x = patchCoord(nodeSpec[stockables[i]].pos).x;
patch.y = patchCoord(nodeSpec[stockables[i]].pos).y;
area.patches.addChild(patch);
}
return area;
}
function Patch(type, place) {
var patch, port, i;
var label, x, y;
var spec = nodeSpec[type];
function onMouseDown1(event) {
stockArea.patches.removeChild(patch);
stage.addChild(patch);
patch.x = event.stageX;
patch.y = event.stageY;
patch.addEventListener('pressmove', onPressMove1);
patch.addEventListener('pressup', onPressUp1);
}
function onPressMove1(event) {
patch.x = event.stageX;
patch.y = event.stageY;
}
function onPressUp1(event) {
var areaLocal, patchesLocal, returnPos, bounds, newPatch;
patch.removeEventListener('pressup', onPressUp1);
patch.removeEventListener('pressmove', onPressMove1);
areaLocal = compositeArea.globalToLocal(event.stageX, event.stageY);
if (compositeArea.getBounds().includes(areaLocal.x, areaLocal.y) &&
compositeArea.patchCount(type) < nodeSpec[type].maxInstance) {
patch.removeEventListener('mousedown', onMouseDown1);
patch.addEventListener('mousedown', onMouseDown2);
patch.addEventListener('pressmove', onPressMove2);
patch.addEventListener('pressup', onPressUp2);
patchesLocal = compositeArea.patches.globalToLocal(event.stageX, event.stageY);
patch.x = patchesLocal.x;
patch.y = patchesLocal.y;
stage.removeChild(patch);
compositeArea.patches.addChild(patch);
newPatch = Patch(type, 'stock');
newPatch.x = patchCoord(spec.pos).x;
newPatch.y = patchCoord(spec.pos).y;
stockArea.patches.addChild(newPatch);
} else {
returnPos = stockArea.patches.localToGlobal(patchCoord(spec.pos).x, patchCoord(spec.pos).y);
Tween.get(patch).to({x : returnPos.x, y : returnPos.y}, 400, Ease.elasticOut).call(function() {
stage.removeChild(patch);
stockArea.patches.addChild(patch);
patch.x = patchCoord(spec.pos).x;
patch.y = patchCoord(spec.pos).y;
});
}
}
function onMouseDown2(event) {
compositeArea.trashbox.startBlink();
}
function onPressMove2(event) {
var areaLocal = compositeArea.globalToLocal(event.stageX, event.stageY);
var patchesLocal;
if (compositeArea.getBounds().includes(areaLocal.x, areaLocal.y)) {
patchesLocal = compositeArea.patches.globalToLocal(event.stageX, event.stageY);
patch.x = patchesLocal.x;
patch.y = patchesLocal.y;
}
if (intersect(patch, compositeArea.trashbox)) {
patch.alpha = 0.5;
} else {
patch.alpha = 1.0;
}
event.stopPropagation();
}
function onPressUp2(event) {
compositeArea.trashbox.stopBlink();
if (patch.alpha !== 1.0) {
remove();
}
}
function getOutputPortUnderPoint(x, y) {
var port, i, local, result = null;
for (i = 0; i < patch.outputPorts.getNumChildren(); i++) {
port = patch.outputPorts.children[i];
local = patch.localToLocal(x, y, port);
if (port.getBounds().includes(local.x, local.y)) {
result = port;
break;
}
}
return result;
}
function getInputPortUnderPoint(x, y) {
var port, i, local, result = null;
for (i = 0; i < patch.inputPorts.getNumChildren(); i++) {
port = patch.inputPorts.children[i];
local = patch.localToLocal(x, y, port);
if (port.getBounds().includes(local.x, local.y)) {
result = port;
break;
}
}
return result;
}
function bgColor() {
var color;
if (patch.node.numberOfInputs === 0) {
color = '#f66';
} else if (patch.node.numberOfOutputs === 0) {
color = '#26f';
} else {
color = '#2f6';
}
return color;
}
function remove() {
var i;
compositeArea.patches.removeChild(patch);
for (i = 0; i < patch.outputPorts.getNumChildren(); i++) {
patch.outputPorts.children[i].disconnect();
}
for (i = 0; i < patch.inputPorts.getNumChildren(); i++) {
patch.inputPorts.children[i].disconnect();
}
}
patch = new Container();
patch.nodeType = type;
patch.node = spec.build();
patch.alpha = 0;
patch.setBounds(-PATCH_WIDTH / 2, -PATCH_HEIGHT / 2, PATCH_WIDTH, PATCH_HEIGHT);
patch.getOutputPortUnderPoint = getOutputPortUnderPoint;
patch.getInputPortUnderPoint = getInputPortUnderPoint;
patch.background = new Shape();
patch.background.graphics
.beginFill(bgColor())
.drawRoundRect(-PATCH_WIDTH / 2, -PATCH_HEIGHT / 2, PATCH_WIDTH, PATCH_HEIGHT, 5);
patch.addChild(patch.background);
patch.nameLabel = new Text(spec.label, '16px sans-serif', '#444');
patch.nameLabel.x = patch.getBounds().x + (patch.getBounds().width - patch.nameLabel.getBounds().width) / 2;
patch.nameLabel.y = patch.getBounds().y;
patch.addChild(patch.nameLabel);
patch.inputPorts = new Container();
patch.addChild(patch.inputPorts);
patch.outputPorts = new Container();
patch.addChild(patch.outputPorts);
for (i = 0; i < patch.node.numberOfInputs; i++) {
x = 8 - patch.getBounds().width / 2;
y = (i + 1) * patch.getBounds().height / (patch.node.numberOfInputs + 1) - patch.getBounds().height / 2;
port = Port('input', i);
port.x = x;
port.y = y;
patch.inputPorts.addChild(port);
if (type === 'ChannelMerger') {
label = new Text(channelLabels[i], 'normal 8px monotype', '#000');
label.x = x + 8;
label.y = y - 4;
patch.addChild(label);
}
}
for (i = 0; i < patch.node.numberOfOutputs; i++) {
x = patch.getBounds().width / 2 - 8;
y = (i + 1) * patch.getBounds().height / (patch.node.numberOfOutputs + 1) - patch.getBounds().height / 2;
port = Port('output', i);
port.x = x;
port.y = y;
patch.outputPorts.addChild(port);
if (type === 'ChannelSplitter') {
label = new Text(channelLabels[i], 'normal 8px monotype', '#000');
label.x = x - 8 - label.getBounds().width;
label.y = y - 4;
patch.addChild(label);
}
}
if (type === 'Analyser') {
patch.background.graphics
.beginFill('black')
.drawRect(-MONITOR_WIDTH / 2, -MONITOR_HEIGHT / 2 + 5, MONITOR_WIDTH, MONITOR_HEIGHT);
patch.monitor = new Shape();
patch.monitor.x = -MONITOR_WIDTH / 2;
patch.monitor.y = -MONITOR_HEIGHT / 2 + 5;
patch.addChild(patch.monitor);
}
Tween.get(patch).to({alpha : 1.0}, 200).call(function() {
if (place === 'stock') {
patch.addEventListener('mousedown', onMouseDown1);
} else {
patch.addEventListener('mousedown', onMouseDown2);
patch.addEventListener('pressmove', onPressMove2);
patch.addEventListener('pressup', onPressUp2);
}
});
return patch;
}
function Port(type, channel) {
var port;
function onMouseDown(event) {
if (!isDeployed(port)) {
return;
}
port.addEventListener('pressmove', onPressMove);
port.addEventListener('pressup', onPressUp);
activeConnection = {
inputX : event.stageX,
inputY : event.stageY,
outputX : event.stageX,
outputY : event.stageY
};
event.stopPropagation();
}
function onPressUp(event) {
var local, patch, hitPort = null;
port.removeEventListener('pressup', onPressUp);
port.removeEventListener('pressmove', onPressMove);
activeConnection = null;
local = compositeArea.globalToLocal(event.stageX, event.stageY);
patch = compositeArea.getPatchUnderPoint(local.x, local.y);
if (patch) {
local = patch.globalToLocal(event.stageX, event.stageY);
if (port.portType === 'input') {
hitPort = patch.getOutputPortUnderPoint(local.x, local.y);
} else {
hitPort = patch.getInputPortUnderPoint(local.x, local.y);
}
if (hitPort) {
port.connect(hitPort);
}
}
event.stopPropagation();
}
function onPressMove(event) {
if (port.portType === 'input') {
activeConnection.outputX = event.stageX;
activeConnection.outputY = event.stageY;
} else {
activeConnection.inputX = event.stageX;
activeConnection.inputY = event.stageY;
}
event.stopPropagation();
}
function onDoubleClick(event) {
disconnect();
}
function connect(peer) {
var myPatch, peerPatch;
if (port.peers.indexOf(peer) === -1) {
port.peers.push(peer);
peer.peers.push(port);
myPatch = port.parent.parent;
peerPatch = peer.parent.parent;
if (port.portType === 'input') {
peerPatch.node.connect(myPatch.node, peer.channel, port.channel);
} else {
myPatch.node.connect(peerPatch.node, port.channel, peer.channel);
}
}
}
function disconnect() {
var i, j, peer, patch;
for (i = 0; i < port.peers.length; i++) {
peer = port.peers[i];
peer.peers.splice(peer.peers.indexOf(port), 1);
}
if (port.portType === 'input') {
for (i = 0; i < port.peers.length; i++) {
peer = port.peers[i];
peer.reconnect();
}
} else {
patch = port.parent.parent;
patch.node.disconnect(port.channel);
}
port.peers = [];
}
function reconnect() {
var patch, peer, peerPatch, i;
patch = port.parent.parent;
patch.node.disconnect(port.channel);
for (i = 0; i < port.peers.length; i++) {
peer = port.peers[i];
peerPatch = peer.parent.parent;
patch.node.connect(peerPatch.node, port.channel, peer.channel);
}
}
port = new Shape();
port.portType = type;
port.channel = channel;
port.graphics.beginFill('#888').drawCircle(0, 0, PORT_RADIUS);
port.setBounds(-PORT_RADIUS, -PORT_RADIUS, 2 * PORT_RADIUS, 2 * PORT_RADIUS);
port.addEventListener('mousedown', onMouseDown);
port.addEventListener('dblclick', onDoubleClick);
port.peers = [];
port.connect = connect;
port.disconnect = disconnect;
port.reconnect = reconnect;
return port;
}
function drawConnection(graphics, outputX, outputY, inputX, inputY) {
graphics.beginStroke('#fff')
.setStrokeStyle(2)
.moveTo(outputX, outputY)
.bezierCurveTo(
outputX + Math.min(100, Math.abs(outputX - inputX)), outputY,
inputX - Math.min(100, Math.abs(outputY - inputY)), inputY,
inputX, inputY);
}
function isDeployed(object) {
return compositeArea.contains(object);
}
function intersect(obj1, obj2) {
var obj1_pos = obj1.localToGlobal(obj1.getBounds().x, obj1.getBounds().y);
var obj2_pos = obj2.localToGlobal(obj2.getBounds().x, obj2.getBounds().y);
var obj1_left = obj1_pos.x, obj1_right = obj1_pos.x + obj1.getBounds().width;
var obj1_top = obj1_pos.y, obj1_bottom = obj1_pos.y + obj1.getBounds().height;
var obj2_left = obj2_pos.x, obj2_right = obj2_pos.x + obj2.getBounds().width;
var obj2_top = obj2_pos.y, obj2_bottom = obj2_pos.y + obj2.getBounds().height;
return ((obj1_left <= obj2_left && obj2_left < obj1_right) || (obj1_left <= obj2_right && obj2_right < obj1_right)) &&
((obj1_top <= obj2_top && obj2_top < obj1_bottom) || (obj1_top <= obj2_bottom && obj2_bottom < obj1_bottom));
}
function patchCoord(pos) {
return {
x: PATCH_MARGIN + PATCH_WIDTH / 2 + (PATCH_WIDTH + PATCH_MARGIN) * pos,
y: PATCH_HEIGHT / 2 + (STOCK_AREA_HEIGHT - PATCH_HEIGHT) / 2
};
}
// c.f. http://stackoverflow.com/a/22538980
function impulseResponse(duration, decay, reverse) {
var sampleRate = audioContext.sampleRate;
var length = sampleRate * duration;
var impulse = audioContext.createBuffer(2, length, sampleRate);
var impulseL = impulse.getChannelData(0);
var impulseR = impulse.getChannelData(1);
if (!decay)
decay = 2.0;
for (var i = 0; i < length; i++){
var n = reverse ? length - i : i;
impulseL[i] = (Math.random() * 2 - 1) * Math.pow(1 - n / length, decay);
impulseR[i] = (Math.random() * 2 - 1) * Math.pow(1 - n / length, decay);
}
return impulse;
}
// c.f. http://stackoverflow.com/a/22313408
function makeDistortionCurve(amount) {
var k = typeof amount === 'number' ? amount : 50,
n_samples = 44100,
curve = new Float32Array(n_samples),
deg = Math.PI / 180,
i = 0,
x;
for ( ; i < n_samples; ++i ) {
x = i * 2 / n_samples - 1;
curve[i] = ( 3 + k ) * x * 20 * deg / ( Math.PI + k * Math.abs(x) );
}
return curve;
};
function setupViews() {
function oscillator() {
var i, inputs, node, pane;
node = nodeSpec.Oscillator.build();
pane = document.querySelector('#' + nodeSpec.Oscillator.label + 'Params');
inputs = pane.querySelectorAll('input[name=type]');
for (i = 0; i < inputs.length; i++) {
inputs[i].addEventListener('change', function(event) {
selectedPatch.node.type = event.target.value;
});
}
pane.querySelector('input[name=frequency]').min = node.frequency.minValue;
pane.querySelector('input[name=frequency]').max = node.frequency.maxValue;
pane.querySelector('input[name=frequency]').addEventListener('change', function(event) {
pane.querySelector('label[name=frequency]').innerText = event.target.value;
selectedPatch.node.frequency.value = event.target.value;
});
pane.querySelector('input[name=detune]').min = node.detune.minValue;
pane.querySelector('input[name=detune]').max = node.detune.maxValue;
pane.querySelector('input[name=detune]').addEventListener('change', function(event) {
pane.querySelector('label[name=detune]').innerText = event.target.value;
selectedPatch.node.detune.value = event.target.value;
});
}
function audioBuffer() {
var node, pane;
node = nodeSpec.AudioBufferSource.build();
pane = document.querySelector('#' + nodeSpec.AudioBufferSource.label + 'Params');
pane.querySelector('input[name=playbackRate]').min = node.playbackRate.minValue * PLAYBACK_RATE_SCALE;