src/chrome/browser/copresence/chrome_whispernet_client.cc

   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 #include "chrome/browser/copresence/chrome_whispernet_client.h"
   6
   7 #include "chrome/browser/extensions/api/copresence_private/copresence_private_api.h"
   8 #include "chrome/browser/extensions/component_loader.h"
   9 #include "chrome/browser/extensions/extension_service.h"
  10 #include "chrome/common/extensions/api/copresence_private.h"
  11 #include "components/copresence/public/copresence_constants.h"
  12 #include "content/public/browser/browser_context.h"
  13 #include "extensions/browser/event_router.h"
  14 #include "extensions/browser/extension_system.h"
  15 #include "grit/browser_resources.h"
  16
  17 // static
  18 const char ChromeWhispernetClient::kWhispernetProxyExtensionId[] =
  19     "bpfmnplchembfbdgieamdodgaencleal";
  20
  21 // Public:
  22
  23 ChromeWhispernetClient::ChromeWhispernetClient(
  24     content::BrowserContext* browser_context)
  25     : browser_context_(browser_context), extension_loaded_(false) {
  26 }
  27
  28 ChromeWhispernetClient::~ChromeWhispernetClient() {
  29 }
  30
  31 void ChromeWhispernetClient::Initialize(const SuccessCallback& init_callback) {
  32   DVLOG(3) << "Initializing whispernet proxy client.";
  33   init_callback_ = init_callback;
  34
  35   extensions::ExtensionSystem* es =
  36       extensions::ExtensionSystem::Get(browser_context_);
  37   DCHECK(es);
  38   ExtensionService* service = es->extension_service();
  39   DCHECK(service);
  40   extensions::ComponentLoader* loader = service->component_loader();
  41   DCHECK(loader);
  42
  43   // This callback is cancelled in Shutdown().
  44   extension_loaded_callback_ = base::Bind(
  45       &ChromeWhispernetClient::OnExtensionLoaded, base::Unretained(this));
  46
  47   if (!loader->Exists(kWhispernetProxyExtensionId)) {
  48     DVLOG(3) << "Loading Whispernet proxy.";
  49     loader->Add(IDR_WHISPERNET_PROXY_MANIFEST,
  50                 base::FilePath(FILE_PATH_LITERAL("whispernet_proxy")));
  51   } else {
  52     init_callback_.Run(true);
  53   }
  54 }
  55
  56 void ChromeWhispernetClient::Shutdown() {
  57   extension_loaded_callback_.Reset();
  58   init_callback_.Reset();
  59   tokens_callback_.Reset();
  60   samples_callback_.Reset();
  61   db_callback_.Reset();
  62 }
  63
  64 // Fire an event to request a token encode.
  65 void ChromeWhispernetClient::EncodeToken(const std::string& token,
  66                                          bool audible) {
  67   DCHECK(extension_loaded_);
  68   DCHECK(browser_context_);
  69   DCHECK(extensions::EventRouter::Get(browser_context_));
  70
  71   scoped_ptr<extensions::Event> event(new extensions::Event(
  72       extensions::api::copresence_private::OnEncodeTokenRequest::kEventName,
  73       extensions::api::copresence_private::OnEncodeTokenRequest::Create(
  74           token, audible),
  75       browser_context_));
  76
  77   extensions::EventRouter::Get(browser_context_)
  78       ->DispatchEventToExtension(kWhispernetProxyExtensionId, event.Pass());
  79 }
  80
  81 // Fire an event to request a decode for the given samples.
  82 void ChromeWhispernetClient::DecodeSamples(const std::string& samples) {
  83   DCHECK(extension_loaded_);
  84   DCHECK(browser_context_);
  85   DCHECK(extensions::EventRouter::Get(browser_context_));
  86
  87   scoped_ptr<extensions::Event> event(new extensions::Event(
  88       extensions::api::copresence_private::OnDecodeSamplesRequest::kEventName,
  89       extensions::api::copresence_private::OnDecodeSamplesRequest::Create(
  90           samples),
  91       browser_context_));
  92
  93   extensions::EventRouter::Get(browser_context_)
  94       ->DispatchEventToExtension(kWhispernetProxyExtensionId, event.Pass());
  95 }
  96
  97 void ChromeWhispernetClient::DetectBroadcast() {
  98   DCHECK(extension_loaded_);
  99   DCHECK(browser_context_);
 100   DCHECK(extensions::EventRouter::Get(browser_context_));
 101
 102   scoped_ptr<extensions::Event> event(new extensions::Event(
 103       extensions::api::copresence_private::OnDetectBroadcastRequest::kEventName,
 104       make_scoped_ptr(new base::ListValue()),
 105       browser_context_));
 106
 107   extensions::EventRouter::Get(browser_context_)
 108       ->DispatchEventToExtension(kWhispernetProxyExtensionId, event.Pass());
 109 }
 110
 111 void ChromeWhispernetClient::RegisterTokensCallback(
 112     const TokensCallback& tokens_callback) {
 113   tokens_callback_ = tokens_callback;
 114 }
 115
 116 void ChromeWhispernetClient::RegisterSamplesCallback(
 117     const SamplesCallback& samples_callback) {
 118   samples_callback_ = samples_callback;
 119 }
 120
 121 void ChromeWhispernetClient::RegisterDetectBroadcastCallback(
 122     const SuccessCallback& db_callback) {
 123   db_callback_ = db_callback;
 124 }
 125
 126 ChromeWhispernetClient::TokensCallback
 127 ChromeWhispernetClient::GetTokensCallback() {
 128   return tokens_callback_;
 129 }
 130
 131 ChromeWhispernetClient::SamplesCallback
 132 ChromeWhispernetClient::GetSamplesCallback() {
 133   return samples_callback_;
 134 }
 135
 136 ChromeWhispernetClient::SuccessCallback
 137 ChromeWhispernetClient::GetDetectBroadcastCallback() {
 138   return db_callback_;
 139 }
 140
 141 ChromeWhispernetClient::SuccessCallback
 142 ChromeWhispernetClient::GetInitializedCallback() {
 143   return extension_loaded_callback_;
 144 }
 145
 146 // Private:
 147
 148 // Fire an event to initialize whispernet with the given parameters.
 149 void ChromeWhispernetClient::InitializeWhispernet(
 150     const extensions::api::copresence_private::AudioParameters& params) {
 151   DCHECK(browser_context_);
 152   DCHECK(extensions::EventRouter::Get(browser_context_));
 153
 154   scoped_ptr<extensions::Event> event(new extensions::Event(
 155       extensions::api::copresence_private::OnInitialize::kEventName,
 156       extensions::api::copresence_private::OnInitialize::Create(params),
 157       browser_context_));
 158
 159   extensions::EventRouter::Get(browser_context_)
 160       ->DispatchEventToExtension(kWhispernetProxyExtensionId, event.Pass());
 161 }
 162
 163 void ChromeWhispernetClient::OnExtensionLoaded(bool success) {
 164   if (extension_loaded_) {
 165     if (!init_callback_.is_null())
 166       init_callback_.Run(success);
 167     return;
 168   }
 169
 170   // Our extension just got loaded, initialize whispernet.
 171   extension_loaded_ = true;
 172
 173   // This will fire another OnExtensionLoaded call once the initialization is
 174   // done, which means we've initialized for realz, hence call the init
 175   // callback.
 176
 177   // At this point, we have the same parameters for record and play. This
 178   // may change later though (ongoing discussion with research).
 179   extensions::api::copresence_private::AudioParameters params;
 180   params.play.sample_rate = copresence::kDefaultSampleRate;
 181   params.play.bits_per_sample = copresence::kDefaultBitsPerSample;
 182   params.play.carrier_frequency = copresence::kDefaultCarrierFrequency;
 183   params.play.repetitions = copresence::kDefaultRepetitions;
 184
 185   params.record.sample_rate = copresence::kDefaultSampleRate;
 186   params.record.bits_per_sample = copresence::kDefaultBitsPerSample;
 187   params.record.carrier_frequency = copresence::kDefaultCarrierFrequency;
 188   params.record.channels = copresence::kDefaultChannels;
 189
 190   InitializeWhispernet(params);
 191 }