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add support for picking audio files and playing them back! #3

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add support for picking audio files and playing them back! #3

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7 changes: 7 additions & 0 deletions css/master.css
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Original file line number Diff line number Diff line change
Expand Up @@ -9,3 +9,10 @@ body {
margin: 0;
overflow: hidden;
}

#filePicker {
position: absolute;
bottom: 0;
right: 0;
z-index: 1;
}
1 change: 1 addition & 0 deletions index.html
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Original file line number Diff line number Diff line change
Expand Up @@ -34,6 +34,7 @@
</style>
</head>
<body>
<input id="filePicker" type="file">
<!-- <audio id="alert" src="sound/alert.ogg"></audio> -->
<div id="div"></div>
<textarea id="alertPitch" name="minPitch" rows="8" cols="80" title="alert for min pitch">0</textarea>
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30 changes: 24 additions & 6 deletions js/fft/FFTdata.js
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Original file line number Diff line number Diff line change
Expand Up @@ -6,18 +6,25 @@ class _spectrogram {
this.analyser = false;
}
init(stream) {
this.audioCtx = new AudioContext();
this.analyser = this.audioCtx.createAnalyser();
this.analyser.fftSize = 2048*4;
this.tmpStream = this.audioCtx.createMediaStreamSource(stream);
this.audioCtx.createMediaStreamSource(stream).connect(this.analyser);
this.analyser.smoothingTimeConstant = 0;
this.resetAnalyser(stream);

this.data = new Uint8Array(this.analyser.frequencyBinCount);

this.analyserFrequencyBinCount = this.analyser.frequencyBinCount;
this.analyserSampleRate = this.audioCtx.sampleRate;
}
resetAnalyser(stream) {
if (this.audioCtx) this.audioCtx.close();
this.audioCtx = new AudioContext();
this.resetContext();
this.audioCtx.createMediaStreamSource(stream).connect(this.analyser);
this.tmpStream = this.audioCtx.createMediaStreamSource(stream);
}
resetContext() {
this.analyser = this.audioCtx.createAnalyser();
this.analyser.fftSize = 2048*4;
this.analyser.smoothingTimeConstant = 0;
}
update() {
this.analyser.getByteFrequencyData(this.data);
//
Expand All @@ -27,4 +34,15 @@ class _spectrogram {
// transform(this.data, this.empty);
// console.log(this.empty);
}
changeStream(stream) {
this.audioCtx.close();
this.audioCtx = null;
this.resetAnalyser(stream);
}
swapContext(ctx) {
let ret = this.audioCtx;
this.audioCtx = ctx;
this.resetContext();
return ret;
}
}
58 changes: 57 additions & 1 deletion js/interface/mouseControl.js
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Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@


let _audio = null;

let mClick = {
x : 0,
Expand Down Expand Up @@ -38,6 +39,9 @@ class _buttonControl {
if (child) {return child.spectrogramPauseToggle()}
this.spectrogram.setPause(this.spectrogram.paused ? false : true);
this.fft.setPause(this.fft.paused ? false : true);
if (_audio) {
this.spectrogram.paused ? _audio.pause() : _audio.play();
}
if (this.spectrogram.paused) {buttonList.buttons[5].setText(`‖`);}
else {buttonList.buttons[5].setText(`▶`);}

Expand Down Expand Up @@ -85,6 +89,43 @@ class _buttonControl {
rolloffSave.push({ ...smoothPeaks[i] });
}
}
changeUserDevice(child=false) {
if (child) {return child.changeUserDevice()}
navigator.mediaDevices.getUserMedia({ audio: true }).then(a => {
console.log('changing to ' + a.toString());
fft.changeStream(a);
}).catch(console.error);
}
playSoundFile(child=false) {
if (child) {return child.playSoundFile()}
let fs = document.querySelector("#filePicker").files;
if (fs.length < 1) {
alert("Please pick a file first!");
return;
}
let f = fs[0];
let u = URL.createObjectURL(f);
let a = new Audio(u);
let o;

_audio = a;

a.addEventListener('ended', ev => {
_audio = null;
URL.revokeObjectURL(u);
this.changeUserDevice();
});

let c = new AudioContext();
let source = c.createMediaElementSource(a);
source.connect(c.destination);

o = fft.swapContext(c);

source.connect(fft.analyser);

a.play();
}
}

let buttonControl = new _buttonControl();
Expand Down Expand Up @@ -166,7 +207,22 @@ function buttonsInit() {
tmpButton.setPos(20,140);
tmpButton.setText(`save rolloff`);
buttonList.add(tmpButton);

// changeUserDevice
tmpButton = new _button();
tmpButton.childBind(buttonControl);
tmpButton.setFunction(buttonControl.changeUserDevice)
tmpButton.setSize(140, 20);
tmpButton.setPos(20,170);
tmpButton.setText(`select user device`);
buttonList.add(tmpButton);
// playSoundFile
tmpButton = new _button();
tmpButton.childBind(buttonControl);
tmpButton.setFunction(buttonControl.playSoundFile)
tmpButton.setSize(140, 20);
tmpButton.setPos(20,200);
tmpButton.setText(`play sound`);
buttonList.add(tmpButton);
//
// tmpButton = new _button();
// tmpButton.childBind(buttonControl);
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2 changes: 1 addition & 1 deletion js/main.js
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Original file line number Diff line number Diff line change
Expand Up @@ -129,7 +129,7 @@ function spectrum(stream) {
}

// ============================== controls ==============================
if ((m.x < 300 && m.y < 200)) {
if ((m.x < 300 && m.y < 240)) {
showControls = true;
alertPitchInput.style.visibility = "visible";
}
Expand Down