mirror of
https://github.com/gyurix1968/guacamole-client.git
synced 2025-09-08 06:01:22 +00:00
80 lines
2.8 KiB
JavaScript
80 lines
2.8 KiB
JavaScript
/*
|
|
* Licensed to the Apache Software Foundation (ASF) under one
|
|
* or more contributor license agreements. See the NOTICE file
|
|
* distributed with this work for additional information
|
|
* regarding copyright ownership. The ASF licenses this file
|
|
* to you under the Apache License, Version 2.0 (the
|
|
* "License"); you may not use this file except in compliance
|
|
* with the License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing,
|
|
* software distributed under the License is distributed on an
|
|
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
|
|
* KIND, either express or implied. See the License for the
|
|
* specific language governing permissions and limitations
|
|
* under the License.
|
|
*/
|
|
|
|
var Guacamole = Guacamole || {};
|
|
|
|
/**
|
|
* Maintains a singleton instance of the Web Audio API AudioContext class,
|
|
* instantiating the AudioContext only in response to the first call to
|
|
* getAudioContext(), and only if no existing AudioContext instance has been
|
|
* provided via the singleton property. Subsequent calls to getAudioContext()
|
|
* will return the same instance.
|
|
*
|
|
* @namespace
|
|
*/
|
|
Guacamole.AudioContextFactory = {
|
|
|
|
/**
|
|
* A singleton instance of a Web Audio API AudioContext object, or null if
|
|
* no instance has yes been created. This property may be manually set if
|
|
* you wish to supply your own AudioContext instance, but care must be
|
|
* taken to do so as early as possible. Assignments to this property will
|
|
* not retroactively affect the value returned by previous calls to
|
|
* getAudioContext().
|
|
*
|
|
* @type {AudioContext}
|
|
*/
|
|
'singleton' : null,
|
|
|
|
/**
|
|
* Returns a singleton instance of a Web Audio API AudioContext object.
|
|
*
|
|
* @return {AudioContext}
|
|
* A singleton instance of a Web Audio API AudioContext object, or null
|
|
* if the Web Audio API is not supported.
|
|
*/
|
|
'getAudioContext' : function getAudioContext() {
|
|
|
|
// Fallback to Webkit-specific AudioContext implementation
|
|
var AudioContext = window.AudioContext || window.webkitAudioContext;
|
|
|
|
// Get new AudioContext instance if Web Audio API is supported
|
|
if (AudioContext) {
|
|
try {
|
|
|
|
// Create new instance if none yet exists
|
|
if (!Guacamole.AudioContextFactory.singleton)
|
|
Guacamole.AudioContextFactory.singleton = new AudioContext();
|
|
|
|
// Return singleton instance
|
|
return Guacamole.AudioContextFactory.singleton;
|
|
|
|
}
|
|
catch (e) {
|
|
// Do not use Web Audio API if not allowed by browser
|
|
}
|
|
}
|
|
|
|
// Web Audio API not supported
|
|
return null;
|
|
|
|
}
|
|
|
|
};
|