content/browser/speech/speech_recognition_dispatcher_host.cc

   1 // Copyright (c) 2012 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 "content/browser/speech/speech_recognition_dispatcher_host.h"
   6
   7 #include "base/bind.h"
   8 #include "base/command_line.h"
   9 #include "base/lazy_instance.h"
  10 #include "content/browser/browser_plugin/browser_plugin_guest.h"
  11 #include "content/browser/renderer_host/render_view_host_impl.h"
  12 #include "content/browser/speech/speech_recognition_manager_impl.h"
  13 #include "content/browser/web_contents/web_contents_impl.h"
  14 #include "content/common/speech_recognition_messages.h"
  15 #include "content/public/browser/speech_recognition_manager_delegate.h"
  16 #include "content/public/browser/speech_recognition_session_config.h"
  17 #include "content/public/browser/speech_recognition_session_context.h"
  18 #include "content/public/common/content_switches.h"
  19
  20 namespace content {
  21
  22 SpeechRecognitionDispatcherHost::SpeechRecognitionDispatcherHost(
  23     bool is_guest,
  24     int render_process_id,
  25     net::URLRequestContextGetter* context_getter)
  26     : is_guest_(is_guest),
  27       render_process_id_(render_process_id),
  28       context_getter_(context_getter) {
  29   // Do not add any non-trivial initialization here, instead do it lazily when
  30   // required (e.g. see the method |SpeechRecognitionManager::GetInstance()|) or
  31   // add an Init() method.
  32 }
  33
  34 SpeechRecognitionDispatcherHost::~SpeechRecognitionDispatcherHost() {
  35   SpeechRecognitionManager::GetInstance()->AbortAllSessionsForListener(this);
  36 }
  37
  38 bool SpeechRecognitionDispatcherHost::OnMessageReceived(
  39     const IPC::Message& message, bool* message_was_ok) {
  40   bool handled = true;
  41   IPC_BEGIN_MESSAGE_MAP_EX(SpeechRecognitionDispatcherHost, message,
  42                            *message_was_ok)
  43     IPC_MESSAGE_HANDLER(SpeechRecognitionHostMsg_StartRequest,
  44                         OnStartRequest)
  45     IPC_MESSAGE_HANDLER(SpeechRecognitionHostMsg_AbortRequest,
  46                         OnAbortRequest)
  47     IPC_MESSAGE_HANDLER(SpeechRecognitionHostMsg_StopCaptureRequest,
  48                         OnStopCaptureRequest)
  49     IPC_MESSAGE_UNHANDLED(handled = false)
  50   IPC_END_MESSAGE_MAP()
  51   return handled;
  52 }
  53
  54 void SpeechRecognitionDispatcherHost::OverrideThreadForMessage(
  55     const IPC::Message& message,
  56     BrowserThread::ID* thread) {
  57   if (message.type() == SpeechRecognitionHostMsg_StartRequest::ID)
  58     *thread = BrowserThread::UI;
  59 }
  60
  61 void SpeechRecognitionDispatcherHost::OnStartRequest(
  62     const SpeechRecognitionHostMsg_StartRequest_Params& params) {
  63   SpeechRecognitionHostMsg_StartRequest_Params input_params(params);
  64
  65   int embedder_render_process_id = 0;
  66   int embedder_render_view_id = MSG_ROUTING_NONE;
  67   if (is_guest_) {
  68     // If the speech API request was from a guest, save the context of the
  69     // embedder since we will use it to decide permission.
  70     RenderViewHostImpl* render_view_host =
  71         RenderViewHostImpl::FromID(render_process_id_, params.render_view_id);
  72     WebContentsImpl* web_contents = static_cast<WebContentsImpl*>(
  73         WebContents::FromRenderViewHost(render_view_host));
  74     BrowserPluginGuest* guest = web_contents->GetBrowserPluginGuest();
  75
  76     embedder_render_process_id =
  77         guest->embedder_web_contents()->GetRenderProcessHost()->GetID();
  78     DCHECK_NE(embedder_render_process_id, 0);
  79     embedder_render_view_id =
  80         guest->embedder_web_contents()->GetRenderViewHost()->GetRoutingID();
  81     DCHECK_NE(embedder_render_view_id, MSG_ROUTING_NONE);
  82   }
  83
  84   // TODO(lazyboy): Check if filter_profanities should use |render_process_id|
  85   // instead of |render_process_id_|. We are also using the same value in
  86   // input_tag_dispatcher_host.cc
  87   bool filter_profanities =
  88       SpeechRecognitionManagerImpl::GetInstance() &&
  89       SpeechRecognitionManagerImpl::GetInstance()->delegate() &&
  90       SpeechRecognitionManagerImpl::GetInstance()->delegate()->
  91           FilterProfanities(render_process_id_);
  92
  93   BrowserThread::PostTask(
  94       BrowserThread::IO,
  95       FROM_HERE,
  96       base::Bind(&SpeechRecognitionDispatcherHost::OnStartRequestOnIO,
  97                  this,
  98                  embedder_render_process_id,
  99                  embedder_render_view_id,
 100                  input_params,
 101                  filter_profanities));
 102 }
 103
 104 void SpeechRecognitionDispatcherHost::OnStartRequestOnIO(
 105     int embedder_render_process_id,
 106     int embedder_render_view_id,
 107     const SpeechRecognitionHostMsg_StartRequest_Params& params,
 108     bool filter_profanities) {
 109   SpeechRecognitionSessionContext context;
 110   context.context_name = params.origin_url;
 111   context.render_process_id = render_process_id_;
 112   context.render_view_id = params.render_view_id;
 113   context.embedder_render_process_id = embedder_render_process_id;
 114   context.embedder_render_view_id = embedder_render_view_id;
 115   if (embedder_render_process_id)
 116     context.guest_render_view_id = params.render_view_id;
 117   context.request_id = params.request_id;
 118   context.requested_by_page_element = false;
 119
 120   SpeechRecognitionSessionConfig config;
 121   config.is_legacy_api = false;
 122   config.language = params.language;
 123   config.grammars = params.grammars;
 124   config.max_hypotheses = params.max_hypotheses;
 125   config.origin_url = params.origin_url;
 126   config.initial_context = context;
 127   config.url_request_context_getter = context_getter_.get();
 128   config.filter_profanities = filter_profanities;
 129   config.continuous = params.continuous;
 130   config.interim_results = params.interim_results;
 131   config.event_listener = this;
 132
 133   int session_id = SpeechRecognitionManager::GetInstance()->CreateSession(
 134       config);
 135   DCHECK_NE(session_id, SpeechRecognitionManager::kSessionIDInvalid);
 136   SpeechRecognitionManager::GetInstance()->StartSession(session_id);
 137 }
 138
 139 void SpeechRecognitionDispatcherHost::OnAbortRequest(int render_view_id,
 140                                                      int request_id) {
 141   int session_id = SpeechRecognitionManager::GetInstance()->GetSession(
 142       render_process_id_, render_view_id, request_id);
 143
 144   // The renderer might provide an invalid |request_id| if the session was not
 145   // started as expected, e.g., due to unsatisfied security requirements.
 146   if (session_id != SpeechRecognitionManager::kSessionIDInvalid)
 147     SpeechRecognitionManager::GetInstance()->AbortSession(session_id);
 148 }
 149
 150 void SpeechRecognitionDispatcherHost::OnStopCaptureRequest(
 151     int render_view_id, int request_id) {
 152   int session_id = SpeechRecognitionManager::GetInstance()->GetSession(
 153       render_process_id_, render_view_id, request_id);
 154
 155   // The renderer might provide an invalid |request_id| if the session was not
 156   // started as expected, e.g., due to unsatisfied security requirements.
 157   if (session_id != SpeechRecognitionManager::kSessionIDInvalid) {
 158     SpeechRecognitionManager::GetInstance()->StopAudioCaptureForSession(
 159         session_id);
 160   }
 161 }
 162
 163 // -------- SpeechRecognitionEventListener interface implementation -----------
 164
 165 void SpeechRecognitionDispatcherHost::OnRecognitionStart(int session_id) {
 166   const SpeechRecognitionSessionContext& context =
 167       SpeechRecognitionManager::GetInstance()->GetSessionContext(session_id);
 168   Send(new SpeechRecognitionMsg_Started(context.render_view_id,
 169                                         context.request_id));
 170 }
 171
 172 void SpeechRecognitionDispatcherHost::OnAudioStart(int session_id) {
 173   const SpeechRecognitionSessionContext& context =
 174       SpeechRecognitionManager::GetInstance()->GetSessionContext(session_id);
 175   Send(new SpeechRecognitionMsg_AudioStarted(context.render_view_id,
 176                                              context.request_id));
 177 }
 178
 179 void SpeechRecognitionDispatcherHost::OnSoundStart(int session_id) {
 180   const SpeechRecognitionSessionContext& context =
 181       SpeechRecognitionManager::GetInstance()->GetSessionContext(session_id);
 182   Send(new SpeechRecognitionMsg_SoundStarted(context.render_view_id,
 183                                              context.request_id));
 184 }
 185
 186 void SpeechRecognitionDispatcherHost::OnSoundEnd(int session_id) {
 187   const SpeechRecognitionSessionContext& context =
 188       SpeechRecognitionManager::GetInstance()->GetSessionContext(session_id);
 189   Send(new SpeechRecognitionMsg_SoundEnded(context.render_view_id,
 190                                            context.request_id));
 191 }
 192
 193 void SpeechRecognitionDispatcherHost::OnAudioEnd(int session_id) {
 194   const SpeechRecognitionSessionContext& context =
 195       SpeechRecognitionManager::GetInstance()->GetSessionContext(session_id);
 196   Send(new SpeechRecognitionMsg_AudioEnded(context.render_view_id,
 197                                            context.request_id));
 198 }
 199
 200 void SpeechRecognitionDispatcherHost::OnRecognitionEnd(int session_id) {
 201   const SpeechRecognitionSessionContext& context =
 202       SpeechRecognitionManager::GetInstance()->GetSessionContext(session_id);
 203   Send(new SpeechRecognitionMsg_Ended(context.render_view_id,
 204                                       context.request_id));
 205 }
 206
 207 void SpeechRecognitionDispatcherHost::OnRecognitionResults(
 208     int session_id,
 209     const SpeechRecognitionResults& results) {
 210   const SpeechRecognitionSessionContext& context =
 211       SpeechRecognitionManager::GetInstance()->GetSessionContext(session_id);
 212   Send(new SpeechRecognitionMsg_ResultRetrieved(context.render_view_id,
 213                                                 context.request_id,
 214                                                 results));
 215 }
 216
 217 void SpeechRecognitionDispatcherHost::OnRecognitionError(
 218     int session_id,
 219     const SpeechRecognitionError& error) {
 220   const SpeechRecognitionSessionContext& context =
 221       SpeechRecognitionManager::GetInstance()->GetSessionContext(session_id);
 222   Send(new SpeechRecognitionMsg_ErrorOccurred(context.render_view_id,
 223                                               context.request_id,
 224                                               error));
 225 }
 226
 227 // The events below are currently not used by speech JS APIs implementation.
 228 void SpeechRecognitionDispatcherHost::OnAudioLevelsChange(int session_id,
 229                                                           float volume,
 230                                                           float noise_volume) {
 231 }
 232
 233 void SpeechRecognitionDispatcherHost::OnEnvironmentEstimationComplete(
 234     int session_id) {
 235 }
 236
 237 }  // namespace content