chrome/renderer/tts_dispatcher.cc

   1 // Copyright (c) 2013 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/renderer/tts_dispatcher.h"
   6
   7 #include "base/basictypes.h"
   8 #include "base/strings/utf_string_conversions.h"
   9 #include "chrome/common/tts_messages.h"
  10 #include "chrome/common/tts_utterance_request.h"
  11 #include "content/public/renderer/render_thread.h"
  12 #include "third_party/WebKit/public/platform/WebCString.h"
  13 #include "third_party/WebKit/public/platform/WebSpeechSynthesisUtterance.h"
  14 #include "third_party/WebKit/public/platform/WebSpeechSynthesisVoice.h"
  15 #include "third_party/WebKit/public/platform/WebString.h"
  16 #include "third_party/WebKit/public/platform/WebVector.h"
  17
  18 using content::RenderThread;
  19 using WebKit::WebSpeechSynthesizerClient;
  20 using WebKit::WebSpeechSynthesisUtterance;
  21 using WebKit::WebSpeechSynthesisVoice;
  22 using WebKit::WebString;
  23 using WebKit::WebVector;
  24
  25 int TtsDispatcher::next_utterance_id_ = 1;
  26
  27 TtsDispatcher::TtsDispatcher(WebSpeechSynthesizerClient* client)
  28     : synthesizer_client_(client) {
  29   RenderThread::Get()->AddObserver(this);
  30 }
  31
  32 TtsDispatcher::~TtsDispatcher() {
  33   RenderThread::Get()->RemoveObserver(this);
  34 }
  35
  36 bool TtsDispatcher::OnControlMessageReceived(const IPC::Message& message) {
  37   bool handled = true;
  38   IPC_BEGIN_MESSAGE_MAP(TtsDispatcher, message)
  39     IPC_MESSAGE_HANDLER(TtsMsg_SetVoiceList, OnSetVoiceList)
  40     IPC_MESSAGE_HANDLER(TtsMsg_DidStartSpeaking, OnDidStartSpeaking)
  41     IPC_MESSAGE_HANDLER(TtsMsg_DidFinishSpeaking, OnDidFinishSpeaking)
  42     IPC_MESSAGE_HANDLER(TtsMsg_DidPauseSpeaking, OnDidPauseSpeaking)
  43     IPC_MESSAGE_HANDLER(TtsMsg_DidResumeSpeaking, OnDidResumeSpeaking)
  44     IPC_MESSAGE_HANDLER(TtsMsg_WordBoundary, OnWordBoundary)
  45     IPC_MESSAGE_HANDLER(TtsMsg_SentenceBoundary, OnSentenceBoundary)
  46     IPC_MESSAGE_HANDLER(TtsMsg_MarkerEvent, OnMarkerEvent)
  47     IPC_MESSAGE_HANDLER(TtsMsg_WasInterrupted, OnWasInterrupted)
  48     IPC_MESSAGE_HANDLER(TtsMsg_WasCancelled, OnWasCancelled)
  49     IPC_MESSAGE_HANDLER(TtsMsg_SpeakingErrorOccurred, OnSpeakingErrorOccurred)
  50     IPC_MESSAGE_UNHANDLED(handled = false)
  51   IPC_END_MESSAGE_MAP()
  52   return handled;
  53 }
  54
  55 void TtsDispatcher::updateVoiceList() {
  56   RenderThread::Get()->Send(new TtsHostMsg_InitializeVoiceList());
  57 }
  58
  59 void TtsDispatcher::speak(const WebSpeechSynthesisUtterance& web_utterance) {
  60   int id = next_utterance_id_++;
  61
  62   utterance_id_map_[id] = web_utterance;
  63
  64   TtsUtteranceRequest utterance;
  65   utterance.id = id;
  66   utterance.text = web_utterance.text().utf8();
  67   utterance.lang = web_utterance.lang().utf8();
  68   utterance.voice = web_utterance.voice().utf8();
  69   utterance.volume = web_utterance.volume();
  70   utterance.rate = web_utterance.rate();
  71   utterance.pitch = web_utterance.pitch();
  72   RenderThread::Get()->Send(new TtsHostMsg_Speak(utterance));
  73 }
  74
  75 void TtsDispatcher::pause() {
  76   RenderThread::Get()->Send(new TtsHostMsg_Pause());
  77 }
  78
  79 void TtsDispatcher::resume() {
  80   RenderThread::Get()->Send(new TtsHostMsg_Resume());
  81 }
  82
  83 void TtsDispatcher::cancel() {
  84   RenderThread::Get()->Send(new TtsHostMsg_Cancel());
  85 }
  86
  87 WebSpeechSynthesisUtterance TtsDispatcher::FindUtterance(int utterance_id) {
  88   base::hash_map<int, WebSpeechSynthesisUtterance>::const_iterator iter =
  89       utterance_id_map_.find(utterance_id);
  90   if (iter == utterance_id_map_.end())
  91     return WebSpeechSynthesisUtterance();
  92   return iter->second;
  93 }
  94
  95 void TtsDispatcher::OnSetVoiceList(const std::vector<TtsVoice>& voices) {
  96   WebVector<WebSpeechSynthesisVoice> out_voices(voices.size());
  97   for (size_t i = 0; i < voices.size(); ++i) {
  98     out_voices[i] = WebSpeechSynthesisVoice();
  99     out_voices[i].setVoiceURI(WebString::fromUTF8(voices[i].voice_uri));
 100     out_voices[i].setName(WebString::fromUTF8(voices[i].name));
 101     out_voices[i].setLanguage(WebString::fromUTF8(voices[i].lang));
 102     out_voices[i].setIsLocalService(voices[i].local_service);
 103     out_voices[i].setIsDefault(voices[i].is_default);
 104   }
 105   synthesizer_client_->setVoiceList(out_voices);
 106 }
 107
 108 void TtsDispatcher::OnDidStartSpeaking(int utterance_id) {
 109   if (utterance_id_map_.find(utterance_id) == utterance_id_map_.end())
 110     return;
 111
 112   WebSpeechSynthesisUtterance utterance = FindUtterance(utterance_id);
 113   if (utterance.isNull())
 114     return;
 115
 116   synthesizer_client_->didStartSpeaking(utterance);
 117 }
 118
 119 void TtsDispatcher::OnDidFinishSpeaking(int utterance_id) {
 120   WebSpeechSynthesisUtterance utterance = FindUtterance(utterance_id);
 121   if (utterance.isNull())
 122     return;
 123
 124   synthesizer_client_->didFinishSpeaking(utterance);
 125   utterance_id_map_.erase(utterance_id);
 126 }
 127
 128 void TtsDispatcher::OnDidPauseSpeaking(int utterance_id) {
 129   WebSpeechSynthesisUtterance utterance = FindUtterance(utterance_id);
 130   if (utterance.isNull())
 131     return;
 132
 133   synthesizer_client_->didPauseSpeaking(utterance);
 134 }
 135
 136 void TtsDispatcher::OnDidResumeSpeaking(int utterance_id) {
 137   WebSpeechSynthesisUtterance utterance = FindUtterance(utterance_id);
 138   if (utterance.isNull())
 139     return;
 140
 141   synthesizer_client_->didResumeSpeaking(utterance);
 142 }
 143
 144 void TtsDispatcher::OnWordBoundary(int utterance_id, int char_index) {
 145   CHECK(char_index >= 0);
 146
 147   WebSpeechSynthesisUtterance utterance = FindUtterance(utterance_id);
 148   if (utterance.isNull())
 149     return;
 150
 151   synthesizer_client_->wordBoundaryEventOccurred(
 152       utterance, static_cast<unsigned>(char_index));
 153 }
 154
 155 void TtsDispatcher::OnSentenceBoundary(int utterance_id, int char_index) {
 156   CHECK(char_index >= 0);
 157
 158   WebSpeechSynthesisUtterance utterance = FindUtterance(utterance_id);
 159   if (utterance.isNull())
 160     return;
 161
 162   synthesizer_client_->sentenceBoundaryEventOccurred(
 163       utterance, static_cast<unsigned>(char_index));
 164 }
 165
 166 void TtsDispatcher::OnMarkerEvent(int utterance_id, int char_index) {
 167   // Not supported yet.
 168 }
 169
 170 void TtsDispatcher::OnWasInterrupted(int utterance_id) {
 171   WebSpeechSynthesisUtterance utterance = FindUtterance(utterance_id);
 172   if (utterance.isNull())
 173     return;
 174
 175   // The web speech API doesn't support "interrupted".
 176   synthesizer_client_->didFinishSpeaking(utterance);
 177   utterance_id_map_.erase(utterance_id);
 178 }
 179
 180 void TtsDispatcher::OnWasCancelled(int utterance_id) {
 181   WebSpeechSynthesisUtterance utterance = FindUtterance(utterance_id);
 182   if (utterance.isNull())
 183     return;
 184
 185   // The web speech API doesn't support "cancelled".
 186   synthesizer_client_->didFinishSpeaking(utterance);
 187   utterance_id_map_.erase(utterance_id);
 188 }
 189
 190 void TtsDispatcher::OnSpeakingErrorOccurred(int utterance_id,
 191                                             const std::string& error_message) {
 192   WebSpeechSynthesisUtterance utterance = FindUtterance(utterance_id);
 193   if (utterance.isNull())
 194     return;
 195
 196   // The web speech API doesn't support an error message.
 197   synthesizer_client_->speakingErrorOccurred(utterance);
 198   utterance_id_map_.erase(utterance_id);
 199 }