mirror of
https://github.com/scratchfoundation/scratch-audio.git
synced 2024-12-22 22:12:48 -05:00
separate out main audioengine from audioplayer for each clone
This commit is contained in:
Eric Rosenbaum
parent
b99b639cd2
commit
10cd3a2c31
1 changed files with 71 additions and 87 deletions
148
src/index.js
148
src/index.js
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@ -2,51 +2,57 @@ var log = require('./log');
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var Tone = require('tone');
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var PitchEffect = require('./effects/PitchEffect');
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var EchoEffect = require('./effects/EchoEffect');
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var PanEffect = require('./effects/PanEffect');
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var RoboticEffect = require('./effects/RoboticEffect');
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var ReverbEffect = require('./effects/ReverbEffect');
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var FuzzEffect = require('./effects/FuzzEffect');
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var WobbleEffect = require('./effects/WobbleEffect');
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var EchoEffect = require('./effects/EchoEffect');
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var ReverbEffect = require('./effects/ReverbEffect');
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var SoundPlayer = require('./SoundPlayer');
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var Soundfont = require('soundfont-player');
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var ADPCMSoundLoader = require('./ADPCMSoundLoader');
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function AudioEngine (sounds) {
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function AudioEngine () {
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this.roboticEffect = new RoboticEffect();
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this.fuzzEffect = new FuzzEffect();
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this.echoEffect = new EchoEffect();
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this.reverbEffect = new ReverbEffect();
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// tone setup
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this.input = new Tone.Gain();
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this.input.chain (
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this.roboticEffect, this.fuzzEffect, this.echoEffect, this.reverbEffect,
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Tone.Master
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);
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this.tone = new Tone();
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// this.input = new Tone.Gain();
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// this.input.connect(Tone.Master);
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}
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AudioEngine.prototype.createPlayer = function () {
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return new AudioPlayer(this);
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};
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function AudioPlayer (audioEngine) {
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this.audioEngine = audioEngine;
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// effects setup
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this.pitchEffect = new PitchEffect();
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this.echoEffect = new EchoEffect();
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this.panEffect = new PanEffect();
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this.reverbEffect = new ReverbEffect();
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this.fuzzEffect = new FuzzEffect();
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this.wobbleEffect = new WobbleEffect();
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this.roboticEffect = new RoboticEffect();
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// the effects are chained to an effects node for this clone, then to the master output
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// the effects are chained to an effects node for this player, then to the master output
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// so audio is sent from each player or instrument, through the effects in order, then out
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// note that the pitch effect works differently - it sets the playback rate for each player
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this.effectsNode = new Tone.Gain();
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this.effectsNode.chain(
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this.roboticEffect, this.fuzzEffect, this.echoEffect,
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this.wobbleEffect, this.panEffect, this.reverbEffect, Tone.Master);
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this.effectsNode.chain(this.panEffect, this.audioEngine.input);
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// reset effects to their default parameters
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this.clearEffects();
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this.effectNames = ['PITCH', 'PAN', 'ECHO', 'REVERB', 'FUZZ', 'TELEPHONE', 'WOBBLE', 'ROBOTIC'];
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this.effectNames = ['PITCH', 'PAN', 'ECHO', 'REVERB', 'FUZZ', 'WOBBLE', 'ROBOTIC'];
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// load sounds
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this.soundPlayers = [];
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this.loadSounds(sounds);
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// soundfont setup
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// soundfont instrument setup
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// instrument names used by Musyng Kite soundfont, in order to
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// match scratch instruments
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@ -65,7 +71,7 @@ function AudioEngine (sounds) {
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this.currentTempo = 60;
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}
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AudioEngine.prototype.loadSounds = function (sounds) {
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AudioPlayer.prototype.loadSounds = function (sounds) {
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this.soundPlayers = [];
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@ -73,17 +79,20 @@ AudioEngine.prototype.loadSounds = function (sounds) {
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// the sound buffers will be added asynchronously as they load
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for (var i=0; i<sounds.length; i++){
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this.soundPlayers[i] = new SoundPlayer(this.effectsNode);
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console.log(sounds[i].fileUrl);
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}
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// load the sounds- most sounds decode natively, but for adpcm sounds
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// we use our own decoder
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// load the sounds
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// most sounds decode natively, but for adpcm sounds we use our own decoder
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var storedContext = this;
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for (var index=0; index<sounds.length; index++) {
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if (sounds[index].format == 'squeak') {
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log.warn('unable to load sound in squeak format');
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continue;
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}
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if (sounds[index].format == 'adpcm') {
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log.warn('attempting to load sound in adpcm format');
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log.warn('loading sound in adpcm format');
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// create a closure to store the sound index, to use when the
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// docder completes and resolves the promise
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// decoder completes and resolves the promise
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(function () {
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var storedIndex = index;
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var loader = new ADPCMSoundLoader();
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@ -94,11 +103,11 @@ AudioEngine.prototype.loadSounds = function (sounds) {
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} else {
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this.soundPlayers[index].setBuffer(new Tone.Buffer(sounds[index].fileUrl));
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}
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}
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};
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AudioEngine.prototype.playSound = function (index) {
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AudioPlayer.prototype.playSound = function (index) {
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this.soundPlayers[index].start();
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var storedContext = this;
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@ -107,40 +116,22 @@ AudioEngine.prototype.playSound = function (index) {
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});
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};
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AudioEngine.prototype.playNoteForBeats = function (note, beats) {
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AudioPlayer.prototype.playNoteForBeats = function (note, beats) {
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this.instrument.play(
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note, Tone.context.currentTime, {duration : Number(beats)}
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);
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/*
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// if the soundplayer exists and its buffer has loaded
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if (this.soundPlayers[this.instrumentNum] && this.soundPlayers[this.instrumentNum].buffer.loaded) {
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// create a new buffer source to play the sound
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var bufferSource = new Tone.BufferSource(this.soundPlayers[this.instrumentNum].buffer.get());
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bufferSource.connect(this.effectsNode);
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bufferSource.start('+0', 0, beats);
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var ratio = this.tone.intervalToFrequencyRatio(note - 60);
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bufferSource.playbackRate.value = ratio;
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return new Promise(function (resolve) {
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setTimeout( function () {
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resolve();
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}, 1000 * beats);
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});
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}
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*/
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};
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AudioEngine.prototype._midiToFreq = function (midiNote) {
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AudioPlayer.prototype._midiToFreq = function (midiNote) {
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var freq = this.tone.intervalToFrequencyRatio(midiNote - 60) * 261.63; // 60 is C4
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return freq;
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};
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AudioEngine.prototype.playDrumForBeats = function (drumNum) {
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this.drumSamplers[drumNum].triggerAttack();
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AudioPlayer.prototype.playDrumForBeats = function () {
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// this.drumSamplers[drumNum].triggerAttack();
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};
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AudioEngine.prototype.stopAllSounds = function () {
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AudioPlayer.prototype.stopAllSounds = function () {
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// stop drum notes
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// for (var i = 0; i<this.drumSamplers.length; i++) {
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// this.drumSamplers[i].triggerRelease();
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@ -157,7 +148,7 @@ AudioEngine.prototype.stopAllSounds = function () {
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}
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};
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AudioEngine.prototype.setEffect = function (effect, value) {
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AudioPlayer.prototype.setEffect = function (effect, value) {
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switch (effect) {
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case 'PITCH':
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this.pitchEffect.set(value, this.soundPlayers);
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@ -166,24 +157,21 @@ AudioEngine.prototype.setEffect = function (effect, value) {
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this.panEffect.set(value);
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break;
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case 'ECHO':
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this.echoEffect.set(value);
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this.audioEngine.echoEffect.set(value);
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break;
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case 'REVERB':
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this.reverbEffect.set(value);
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this.audioEngine.reverbEffect.set(value);
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break;
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case 'FUZZ' :
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this.fuzzEffect.set(value);
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break;
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case 'WOBBLE' :
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this.wobbleEffect.set(value);
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this.audioEngine.fuzzEffect.set(value);
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break;
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case 'ROBOTIC' :
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this.roboticEffect.set(value);
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this.audioEngine.roboticEffect.set(value);
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break;
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}
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};
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AudioEngine.prototype.changeEffect = function (effect, value) {
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AudioPlayer.prototype.changeEffect = function (effect, value) {
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switch (effect) {
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case 'PITCH':
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this.pitchEffect.changeBy(value, this.soundPlayers);
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@ -192,37 +180,33 @@ AudioEngine.prototype.changeEffect = function (effect, value) {
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this.panEffect.changeBy(value);
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break;
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case 'ECHO':
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this.echoEffect.changeBy(value);
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this.audioEngine.echoEffect.changeBy(value);
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break;
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case 'REVERB':
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this.reverbEffect.changeBy(value);
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this.audioEngine.reverbEffect.changeBy(value);
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break;
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case 'FUZZ' :
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this.fuzzEffect.changeBy(value);
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break;
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case 'WOBBLE' :
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this.wobbleEffect.changeBy(value);
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this.audioEngine.fuzzEffect.changeBy(value);
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break;
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case 'ROBOTIC' :
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this.roboticEffect.changeBy(value);
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this.audioEngine.roboticEffect.changeBy(value);
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break;
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}
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};
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AudioEngine.prototype.clearEffects = function () {
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this.echoEffect.set(0);
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AudioPlayer.prototype.clearEffects = function () {
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this.panEffect.set(0);
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this.reverbEffect.set(0);
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this.fuzzEffect.set(0);
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this.roboticEffect.set(0);
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this.wobbleEffect.set(0);
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this.pitchEffect.set(0, this.soundPlayers);
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this.effectsNode.gain.value = 1;
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this.audioEngine.echoEffect.set(0);
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this.audioEngine.reverbEffect.set(0);
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this.audioEngine.fuzzEffect.set(0);
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this.audioEngine.roboticEffect.set(0);
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};
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AudioEngine.prototype.setInstrument = function (instrumentNum) {
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AudioPlayer.prototype.setInstrument = function (instrumentNum) {
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this.instrumentNum = instrumentNum - 1;
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return Soundfont.instrument(Tone.context, this.instrumentNames[this.instrumentNum]).then(
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@ -233,29 +217,29 @@ AudioEngine.prototype.setInstrument = function (instrumentNum) {
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);
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};
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AudioEngine.prototype.setVolume = function (value) {
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AudioPlayer.prototype.setVolume = function (value) {
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var vol = this._clamp(value, 0, 100);
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vol /= 100;
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this.effectsNode.gain.value = vol;
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};
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AudioEngine.prototype.changeVolume = function (value) {
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AudioPlayer.prototype.changeVolume = function (value) {
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value /= 100;
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var newVol = this.effectsNode.gain.value + value;
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this.effectsNode.gain.value = this._clamp(newVol, 0, 1);
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};
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AudioEngine.prototype.setTempo = function (value) {
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AudioPlayer.prototype.setTempo = function (value) {
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var newTempo = this._clamp(value, 10, 1000);
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this.currentTempo = newTempo;
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};
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AudioEngine.prototype.changeTempo = function (value) {
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AudioPlayer.prototype.changeTempo = function (value) {
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var newTempo = this._clamp(this.currentTempo + value, 10, 1000);
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this.currentTempo = newTempo;
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};
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AudioEngine.prototype._clamp = function (input, min, max) {
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AudioPlayer.prototype._clamp = function (input, min, max) {
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return Math.min(Math.max(input, min), max);
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};
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