scratch-audio
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scratch-audio - npm Package Compare versions
Comparing version 0.1.0-prerelease.1510703529 to 0.1.0-prerelease.1511290007
| { | ||
| "name": "scratch-audio", | ||
| "version": "0.1.0-prerelease.1510703529", | ||
| "version": "0.1.0-prerelease.1511290007", | ||
| "description": "audio engine for scratch 3.0", | ||
@@ -5,0 +5,0 @@ "main": "dist.js", |
@@ -12,4 +12,2 @@ const StartAudioContext = require('startaudiocontext'); | ||
| const ADPCMSoundDecoder = require('./ADPCMSoundDecoder'); | ||
| const InstrumentPlayer = require('./InstrumentPlayer'); | ||
| const DrumPlayer = require('./DrumPlayer'); | ||
@@ -96,14 +94,2 @@ /** | ||
| /** | ||
| * Play a drum sound. The AudioEngine contains the DrumPlayer, but the AudioPlayer | ||
| * calls this function so that it can pass a reference to its own effects node. | ||
| * @param {number} drum - a drum number (0-indexed) | ||
| * @param {number} beats - a duration in beats | ||
| * @return {Promise} a Promise that resolves after the duration has elapsed | ||
| */ | ||
| playDrumForBeats (drum, beats) { | ||
| this.audioEngine.drumPlayer.play(drum, this.effectsNode); | ||
| return this.audioEngine.waitForBeats(beats); | ||
| } | ||
| /** | ||
| * Stop all sounds, notes and drums that are playing | ||
@@ -161,4 +147,3 @@ */ | ||
| * There is a single instance of the AudioEngine. It handles global audio properties and effects, | ||
| * loads all the audio buffers for sounds belonging to sprites, and creates a single instrument player | ||
| * and a drum player, used by all play note and play drum blocks. | ||
| * loads all the audio buffers for sounds belonging to sprites. | ||
| */ | ||
@@ -173,14 +158,2 @@ class AudioEngine { | ||
| // global tempo in bpm (beats per minute) | ||
| this.currentTempo = 60; | ||
| // instrument player for play note blocks | ||
| this.instrumentPlayer = new InstrumentPlayer(this.audioContext); | ||
| this.instrumentPlayer.outputNode = this.input; | ||
| this.numInstruments = this.instrumentPlayer.instrumentNames.length; | ||
| // drum player for play drum blocks | ||
| this.drumPlayer = new DrumPlayer(this.audioContext); | ||
| this.numDrums = this.drumPlayer.drumSounds.length; | ||
| // a map of soundIds to audio buffers, holding sounds for all sprites | ||
@@ -281,55 +254,2 @@ this.audioBuffers = {}; | ||
| /** | ||
| * Play a note for a duration on an instrument with a volume | ||
| * @param {number} note - a MIDI note number | ||
| * @param {number} beats - a duration in beats | ||
| * @param {number} inst - an instrument number (0-indexed) | ||
| * @param {number} vol - a volume level (0-100%) | ||
| * @return {Promise} a Promise that resolves after the duration has elapsed | ||
| */ | ||
| playNoteForBeatsWithInstAndVol (note, beats, inst, vol) { | ||
| const sec = this.beatsToSec(beats); | ||
| this.instrumentPlayer.playNoteForSecWithInstAndVol(note, sec, inst, vol); | ||
| return this.waitForBeats(beats); | ||
| } | ||
| /** | ||
| * Convert a number of beats to a number of seconds, using the current tempo | ||
| * @param {number} beats number of beats to convert to secs | ||
| * @return {number} seconds number of seconds `beats` will last | ||
| */ | ||
| beatsToSec (beats) { | ||
| return (60 / this.currentTempo) * beats; | ||
| } | ||
| /** | ||
| * Wait for some number of beats | ||
| * @param {number} beats number of beats to wait for | ||
| * @return {Promise} a Promise that resolves after the duration has elapsed | ||
| */ | ||
| waitForBeats (beats) { | ||
| const storedContext = this; | ||
| return new Promise(resolve => { | ||
| setTimeout(() => { | ||
| resolve(); | ||
| }, storedContext.beatsToSec(beats) * 1000); | ||
| }); | ||
| } | ||
| /** | ||
| * Set the global tempo in bpm (beats per minute) | ||
| * @param {number} value - the new tempo to set | ||
| */ | ||
| setTempo (value) { | ||
| this.currentTempo = value; | ||
| } | ||
| /** | ||
| * Change the tempo by some number of bpm (beats per minute) | ||
| * @param {number} value - the number of bpm to change the tempo by | ||
| */ | ||
| changeTempo (value) { | ||
| this.setTempo(this.currentTempo + value); | ||
| } | ||
| /** | ||
| * Get the current loudness of sound received by the microphone. | ||
@@ -336,0 +256,0 @@ * Sound is measured in RMS and smoothed. |
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Improved metrics
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