fireball/lib/audio/Audio.js
2018-12-25 17:29:22 +03:30

320 lines
4.9 KiB
JavaScript

/**
* @author mrdoob / http://mrdoob.com/
* @author Reece Aaron Lecrivain / http://reecenotes.com/
*/
import { Object3D } from '../core/Object3D.js';
function Audio( listener ) {
Object3D.call( this );
this.type = 'Audio';
this.context = listener.context;
this.gain = this.context.createGain();
this.gain.connect( listener.getInput() );
this.autoplay = false;
this.buffer = null;
this.loop = false;
this.startTime = 0;
this.offset = 0;
this.playbackRate = 1;
this.isPlaying = false;
this.hasPlaybackControl = true;
this.sourceType = 'empty';
this.filters = [];
}
Audio.prototype = Object.assign( Object.create( Object3D.prototype ), {
constructor: Audio,
getOutput: function () {
return this.gain;
},
setNodeSource: function ( audioNode ) {
this.hasPlaybackControl = false;
this.sourceType = 'audioNode';
this.source = audioNode;
this.connect();
return this;
},
setMediaElementSource: function ( mediaElement ) {
this.hasPlaybackControl = false;
this.sourceType = 'mediaNode';
this.source = this.context.createMediaElementSource( mediaElement );
this.connect();
return this;
},
setBuffer: function ( audioBuffer ) {
this.buffer = audioBuffer;
this.sourceType = 'buffer';
if ( this.autoplay ) this.play();
return this;
},
play: function () {
if ( this.isPlaying === true ) {
console.warn( 'THREE.Audio: Audio is already playing.' );
return;
}
if ( this.hasPlaybackControl === false ) {
console.warn( 'THREE.Audio: this Audio has no playback control.' );
return;
}
var source = this.context.createBufferSource();
source.buffer = this.buffer;
source.loop = this.loop;
source.onended = this.onEnded.bind( this );
source.playbackRate.setValueAtTime( this.playbackRate, this.startTime );
this.startTime = this.context.currentTime;
source.start( this.startTime, this.offset );
this.isPlaying = true;
this.source = source;
return this.connect();
},
pause: function () {
if ( this.hasPlaybackControl === false ) {
console.warn( 'THREE.Audio: this Audio has no playback control.' );
return;
}
if ( this.isPlaying === true ) {
this.source.stop();
this.source.onended = null;
this.offset += ( this.context.currentTime - this.startTime ) * this.playbackRate;
this.isPlaying = false;
}
return this;
},
stop: function () {
if ( this.hasPlaybackControl === false ) {
console.warn( 'THREE.Audio: this Audio has no playback control.' );
return;
}
this.source.stop();
this.source.onended = null;
this.offset = 0;
this.isPlaying = false;
return this;
},
connect: function () {
if ( this.filters.length > 0 ) {
this.source.connect( this.filters[ 0 ] );
for ( var i = 1, l = this.filters.length; i < l; i ++ ) {
this.filters[ i - 1 ].connect( this.filters[ i ] );
}
this.filters[ this.filters.length - 1 ].connect( this.getOutput() );
} else {
this.source.connect( this.getOutput() );
}
return this;
},
disconnect: function () {
if ( this.filters.length > 0 ) {
this.source.disconnect( this.filters[ 0 ] );
for ( var i = 1, l = this.filters.length; i < l; i ++ ) {
this.filters[ i - 1 ].disconnect( this.filters[ i ] );
}
this.filters[ this.filters.length - 1 ].disconnect( this.getOutput() );
} else {
this.source.disconnect( this.getOutput() );
}
return this;
},
getFilters: function () {
return this.filters;
},
setFilters: function ( value ) {
if ( ! value ) value = [];
if ( this.isPlaying === true ) {
this.disconnect();
this.filters = value;
this.connect();
} else {
this.filters = value;
}
return this;
},
getFilter: function () {
return this.getFilters()[ 0 ];
},
setFilter: function ( filter ) {
return this.setFilters( filter ? [ filter ] : [] );
},
setPlaybackRate: function ( value ) {
if ( this.hasPlaybackControl === false ) {
console.warn( 'THREE.Audio: this Audio has no playback control.' );
return;
}
this.playbackRate = value;
if ( this.isPlaying === true ) {
this.source.playbackRate.setValueAtTime( this.playbackRate, this.context.currentTime );
}
return this;
},
getPlaybackRate: function () {
return this.playbackRate;
},
onEnded: function () {
this.isPlaying = false;
},
getLoop: function () {
if ( this.hasPlaybackControl === false ) {
console.warn( 'THREE.Audio: this Audio has no playback control.' );
return false;
}
return this.loop;
},
setLoop: function ( value ) {
if ( this.hasPlaybackControl === false ) {
console.warn( 'THREE.Audio: this Audio has no playback control.' );
return;
}
this.loop = value;
if ( this.isPlaying === true ) {
this.source.loop = this.loop;
}
return this;
},
getVolume: function () {
return this.gain.gain.value;
},
setVolume: function ( value ) {
this.gain.gain.setTargetAtTime( value, this.context.currentTime, 0.01 );
return this;
}
} );
export { Audio };