Adding CRC and multi-client support in the Whispernet NaCl wrapper

chrome/browser/resources/whispernet_proxy/js/init.js

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 'use strict';
 
 // Global holding our NaclBridge.
 var whispernetNacl = null;
 
 // Encoders and decoders for each client.
 var whisperEncoders = {};
 var whisperDecoders = {};
 
 /**
  * Initialize the whispernet encoder and decoder.
  * Call this before any other functions.
  * @param {string} clientId A string identifying the requester.
  * @param {Object} audioParams Audio parameters for token encoding and decoding.
  */
 function audioConfig(clientId, audioParams) {
   if (!whispernetNacl) {
     chrome.copresencePrivate.sendInitialized(false);
     return;
   }
 
-  console.log('Configuring encoder and decoder!');
+  console.log('Configuring encoder and decoder for client ' + clientId);
   whisperEncoders[clientId] =
       new WhisperEncoder(audioParams.paramData, whispernetNacl, clientId);
   whisperDecoders[clientId] =
       new WhisperDecoder(audioParams.paramData, whispernetNacl, clientId);
 }
 
 /**
  * Sends a request to whispernet to encode a token.
  * @param {string} clientId A string identifying the requester.
  * @param {Object} params Encode token parameters object.
  */
 function encodeTokenRequest(clientId, params) {
   if (whisperEncoders[clientId]) {
     whisperEncoders[clientId].encode(params);
   } else {
-    console.error('encodeTokenRequest: Whisper not initialized!');
+    console.error('encodeTokenRequest: Whisper not initialized for client ' +
+        clientId);
   }
 }
 
 /**
  * Sends a request to whispernet to decode samples.
  * @param {string} clientId A string identifying the requester.
  * @param {Object} params Process samples parameters object.
  */
 function decodeSamplesRequest(clientId, params) {
   if (whisperDecoders[clientId]) {
     whisperDecoders[clientId].processSamples(params);
   } else {
-    console.error('decodeSamplesRequest: Whisper not initialized!');
+    console.error('decodeSamplesRequest: Whisper not initialized for client ' +
+        clientId);
   }
 }
 
 /**
  * Initialize our listeners and signal that the extension is loaded.
  */
 function onWhispernetLoaded() {
   console.log('init: Nacl ready!');
 
   // Setup all the listeners for the private API.
@@ skipping 13 matching lines @@
  */
 function initWhispernet() {
   console.log('init: Starting Nacl bridge.');
   // TODO(rkc): Figure out how to embed the .nmf and the .pexe into component
   // resources without having to rename them to .js.
   whispernetNacl = new NaclBridge('whispernet_proxy.nmf.png',
                                   onWhispernetLoaded);
 }
 
 window.addEventListener('DOMContentLoaded', initWhispernet);