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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 'use strict'; | |
| 6 | |
| 7 // Global holding our NaclBridge. | |
| 8 var whispernetNacl = null; | |
| 9 | |
| 10 // Encoders and decoders for each client. | |
| 11 var whisperEncoders = {}; | |
| 12 var whisperDecoders = {}; | |
| 13 | |
| 14 /** | |
| 15 * Initialize the whispernet encoder and decoder. | |
| 16 * Call this before any other functions. | |
| 17 * @param {string} clientId A string identifying the requester. | |
| 18 * @param {Object} audioParams Audio parameters for token encoding and decoding. | |
| 19 */ | |
| 20 function audioConfig(clientId, audioParams) { | |
| 21 if (!whispernetNacl) { | |
| 22 chrome.copresencePrivate.sendInitialized(false); | |
| 23 return; | |
| 24 } | |
| 25 | |
| 26 console.log('Configuring encoder and decoder for client ' + clientId); | |
| 27 whisperEncoders[clientId] = | |
| 28 new WhisperEncoder(audioParams.paramData, whispernetNacl, clientId); | |
| 29 whisperDecoders[clientId] = | |
| 30 new WhisperDecoder(audioParams.paramData, whispernetNacl, clientId); | |
| 31 } | |
| 32 | |
| 33 /** | |
| 34 * Sends a request to whispernet to encode a token. | |
| 35 * @param {string} clientId A string identifying the requester. | |
| 36 * @param {Object} params Encode token parameters object. | |
| 37 */ | |
| 38 function encodeTokenRequest(clientId, params) { | |
| 39 if (whisperEncoders[clientId]) { | |
| 40 whisperEncoders[clientId].encode(params); | |
| 41 } else { | |
| 42 console.error('encodeTokenRequest: Whisper not initialized for client ' + | |
| 43 clientId); | |
| 44 } | |
| 45 } | |
| 46 | |
| 47 /** | |
| 48 * Sends a request to whispernet to decode samples. | |
| 49 * @param {string} clientId A string identifying the requester. | |
| 50 * @param {Object} params Process samples parameters object. | |
| 51 */ | |
| 52 function decodeSamplesRequest(clientId, params) { | |
| 53 if (whisperDecoders[clientId]) { | |
| 54 whisperDecoders[clientId].processSamples(params); | |
| 55 } else { | |
| 56 console.error('decodeSamplesRequest: Whisper not initialized for client ' + | |
| 57 clientId); | |
| 58 } | |
| 59 } | |
| 60 | |
| 61 /** | |
| 62 * Initialize our listeners and signal that the extension is loaded. | |
| 63 */ | |
| 64 function onWhispernetLoaded() { | |
| 65 console.log('init: Nacl ready!'); | |
| 66 | |
| 67 // Setup all the listeners for the private API. | |
| 68 chrome.copresencePrivate.onConfigAudio.addListener(audioConfig); | |
| 69 chrome.copresencePrivate.onEncodeTokenRequest.addListener(encodeTokenRequest); | |
| 70 chrome.copresencePrivate.onDecodeSamplesRequest.addListener( | |
| 71 decodeSamplesRequest); | |
| 72 | |
| 73 // This first initialized is sent to indicate that the library is loaded. | |
| 74 // Every other time, it will be sent only when Chrome wants to reinitialize | |
| 75 // the encoder and decoder. | |
| 76 chrome.copresencePrivate.sendInitialized(true); | |
| 77 } | |
| 78 | |
| 79 /** | |
| 80 * Initialize the whispernet Nacl bridge. | |
| 81 */ | |
| 82 function initWhispernet() { | |
| 83 console.log('init: Starting Nacl bridge.'); | |
| 84 // TODO(rkc): Figure out how to embed the .nmf and the .pexe into component | |
| 85 // resources without having to rename them to .js. | |
| 86 whispernetNacl = new NaclBridge('whispernet_proxy.nmf.png', | |
| 87 onWhispernetLoaded); | |
| 88 } | |
| 89 | |
| 90 window.addEventListener('DOMContentLoaded', initWhispernet); | |
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