92 lines
4.1 KiB
JavaScript
92 lines
4.1 KiB
JavaScript
/* global WebAudioTestAPI */
|
|
import 'web-audio-test-api';
|
|
WebAudioTestAPI.setState({
|
|
'OfflineAudioContext#startRendering': 'promise'
|
|
});
|
|
|
|
import AudioEffects from '../../../src/lib/audio/audio-effects';
|
|
import RobotEffect from '../../../src/lib/audio/effects/robot-effect';
|
|
import EchoEffect from '../../../src/lib/audio/effects/echo-effect';
|
|
import VolumeEffect from '../../../src/lib/audio/effects/volume-effect';
|
|
|
|
describe('Audio Effects manager', () => {
|
|
const audioContext = new AudioContext();
|
|
const audioBuffer = audioContext.createBuffer(1, 400, 44100);
|
|
|
|
test('changes buffer length and playback rate for faster effect', () => {
|
|
const audioEffects = new AudioEffects(audioBuffer, 'faster', 0, 1);
|
|
expect(audioEffects.audioContext._.length).toBeLessThan(400);
|
|
});
|
|
|
|
test('changes buffer length and playback rate for slower effect', () => {
|
|
const audioEffects = new AudioEffects(audioBuffer, 'slower', 0, 1);
|
|
expect(audioEffects.audioContext._.length).toBeGreaterThan(400);
|
|
});
|
|
|
|
test('changes buffer length for echo effect', () => {
|
|
const audioEffects = new AudioEffects(audioBuffer, 'echo', 0, 1);
|
|
expect(audioEffects.audioContext._.length).toBeGreaterThan(400);
|
|
});
|
|
|
|
test('updates the trim positions after an effect has changed the length of selection', () => {
|
|
const slowerEffect = new AudioEffects(audioBuffer, 'slower', 0.25, 0.75);
|
|
expect(slowerEffect.adjustedTrimStartSeconds).toEqual(slowerEffect.trimStartSeconds);
|
|
expect(slowerEffect.adjustedTrimEndSeconds).toBeGreaterThan(slowerEffect.trimEndSeconds);
|
|
|
|
const fasterEffect = new AudioEffects(audioBuffer, 'faster', 0.25, 0.75);
|
|
expect(fasterEffect.adjustedTrimStartSeconds).toEqual(fasterEffect.trimStartSeconds);
|
|
expect(fasterEffect.adjustedTrimEndSeconds).toBeLessThan(fasterEffect.trimEndSeconds);
|
|
|
|
// Some effects do not change the length of the selection
|
|
const fadeEffect = new AudioEffects(audioBuffer, 'fade in', 0.25, 0.75);
|
|
expect(fadeEffect.adjustedTrimStartSeconds).toEqual(fadeEffect.trimStartSeconds);
|
|
// Should be within one millisecond (flooring can change the duration by one sample)
|
|
expect(fadeEffect.adjustedTrimEndSeconds).toBeCloseTo(fadeEffect.trimEndSeconds, 3);
|
|
});
|
|
|
|
test.skip('process starts the offline rendering context and returns a promise', () => {
|
|
// @todo haven't been able to get web audio test api to actually run render
|
|
});
|
|
|
|
test('reverse effect strictly reverses the samples', () => {
|
|
const fakeSound = [1, 2, 3, 4, 5, 6, 7, 8];
|
|
|
|
const fakeBuffer = audioContext.createBuffer(1, 8, 44100);
|
|
const bufferData = fakeBuffer.getChannelData(0);
|
|
fakeSound.forEach((sample, index) => {
|
|
bufferData[index] = sample;
|
|
});
|
|
|
|
// Reverse the entire sound
|
|
const reverseAll = new AudioEffects(fakeBuffer, 'reverse', 0, 1);
|
|
expect(Array.from(reverseAll.buffer.getChannelData(0))).toEqual(fakeSound.reverse());
|
|
|
|
// Reverse part of the sound
|
|
const reverseSelection = new AudioEffects(fakeBuffer, 'reverse', 0.25, 0.75);
|
|
const selectionReversed = [1, 2, 6, 5, 4, 3, 7, 8];
|
|
expect(Array.from(reverseSelection.buffer.getChannelData(0))).toEqual(selectionReversed);
|
|
});
|
|
});
|
|
|
|
describe('Effects', () => {
|
|
let audioContext;
|
|
|
|
beforeEach(() => {
|
|
audioContext = new AudioContext();
|
|
});
|
|
|
|
test('all effects provide an input and output that are connected', () => {
|
|
const robotEffect = new RobotEffect(audioContext, 0, 1);
|
|
expect(robotEffect.input).toBeInstanceOf(AudioNode);
|
|
expect(robotEffect.output).toBeInstanceOf(AudioNode);
|
|
|
|
const echoEffect = new EchoEffect(audioContext, 0, 1);
|
|
expect(echoEffect.input).toBeInstanceOf(AudioNode);
|
|
expect(echoEffect.output).toBeInstanceOf(AudioNode);
|
|
|
|
const volumeEffect = new VolumeEffect(audioContext, 0.5, 0, 1);
|
|
expect(volumeEffect.input).toBeInstanceOf(AudioNode);
|
|
expect(volumeEffect.output).toBeInstanceOf(AudioNode);
|
|
});
|
|
});
|