| // Copyright 2017 Google Inc. All Rights Reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #include "cobalt/speech/speech_synthesis.h" |
| |
| #include <string> |
| |
| #include "cobalt/dom/navigator.h" |
| #include "starboard/speech_synthesis.h" |
| |
| namespace cobalt { |
| namespace speech { |
| |
| SpeechSynthesis::SpeechSynthesis(const scoped_refptr<dom::Navigator>& navigator) |
| : paused_(false), navigator_(navigator) { |
| #if SB_HAS(SPEECH_SYNTHESIS) |
| const char* kVoiceName = "Cobalt"; |
| std::string voice_urn(kVoiceName); |
| std::string voice_lang(navigator_->language()); |
| voice_urn.append(" "); |
| voice_urn.append(voice_lang); |
| voices_.push_back( |
| new SpeechSynthesisVoice(voice_urn, kVoiceName, voice_lang, false, true)); |
| #endif |
| } |
| |
| SpeechSynthesis::~SpeechSynthesis() {} |
| |
| void SpeechSynthesis::set_onvoiceschanged( |
| const EventListenerScriptValue& event_listener) { |
| base::Token event_name = base::Tokens::voiceschanged(); |
| SetAttributeEventListener(event_name, event_listener); |
| DispatchEvent(new dom::Event(event_name)); |
| } |
| |
| void SpeechSynthesis::Cancel() { |
| for (UtterancesList::iterator utterance_iterator = utterances_.begin(); |
| utterance_iterator != utterances_.end(); ++utterance_iterator) { |
| (*utterance_iterator)->DispatchErrorCancelledEvent(); |
| } |
| utterances_.clear(); |
| } |
| |
| void SpeechSynthesis::Resume() { |
| if (paused_) { |
| paused_ = false; |
| for (UtterancesList::iterator utterance_iterator = utterances_.begin(); |
| utterance_iterator != utterances_.end(); ++utterance_iterator) { |
| Speak(*utterance_iterator); |
| if (utterances_.empty()) break; |
| } |
| } |
| } |
| |
| void SpeechSynthesis::DispatchErrorEvent( |
| const scoped_refptr<SpeechSynthesisUtterance>& utterance, |
| SpeechSynthesisErrorEvent::SpeechErrorCode error_code) { |
| utterance->DispatchErrorEvent(error_code); |
| Cancel(); |
| } |
| |
| void SpeechSynthesis::Speak( |
| const scoped_refptr<SpeechSynthesisUtterance>& utterance) { |
| if (paused_) { |
| // When the synthesis is paused, the utterance needs to be added to a queue |
| // and preserved until synthesis is canceled or resumed. |
| // A copy of the utterance needs to be made, so that the current state of |
| // the object is preserved. |
| SpeechSynthesisUtterance* copied_utterance = |
| new SpeechSynthesisUtterance(utterance); |
| copied_utterance->SignalPendingSpeak(); |
| utterances_.push_back(copied_utterance); |
| return; |
| } |
| utterance->SignalPendingSpeak(); |
| #if SB_HAS(SPEECH_SYNTHESIS) |
| if (!utterance->lang().empty() && |
| utterance->lang() != navigator_->language()) { |
| DispatchErrorEvent(utterance, |
| SpeechSynthesisErrorEvent::kLanguageUnavailable); |
| return; |
| } |
| if ((utterance->volume() != 1.0f) || (utterance->rate() != 1.0f) || |
| (utterance->pitch() != 1.0f)) { |
| DispatchErrorEvent(utterance, SpeechSynthesisErrorEvent::kInvalidArgument); |
| return; |
| } |
| |
| #if SB_API_VERSION < SB_EXPERIMENTAL_API_VERSION |
| // DEPRECATED IN API VERSION 4 |
| std::string language = |
| utterance->lang().empty() ? navigator_->language() : utterance->lang(); |
| SbSpeechSynthesisSetLanguage(language.c_str()); |
| #endif |
| SB_DLOG(INFO) << "Speaking: \"" << utterance->text() << "\" " |
| << utterance->lang(); |
| SbSpeechSynthesisSpeak(utterance->text().c_str()); |
| utterance->DispatchStartEvent(); |
| utterance->DispatchEndEvent(); |
| #else |
| DispatchErrorEvent(utterance, |
| SpeechSynthesisErrorEvent::kSynthesisUnavailable); |
| #endif |
| } |
| |
| } // namespace speech |
| } // namespace cobalt |