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// Copyright (c) 2012 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.
#include <math.h>
#include <sapi.h>
#include "base/memory/singleton.h"
#include "base/strings/string_number_conversions.h"
#include "base/utf_string_conversions.h"
#include "base/values.h"
#include "base/win/scoped_comptr.h"
#include "chrome/browser/speech/tts_controller.h"
#include "chrome/browser/speech/tts_platform.h"
class TtsPlatformImplWin : public TtsPlatformImpl {
public:
virtual bool PlatformImplAvailable() {
return true;
}
virtual bool Speak(
int utterance_id,
const std::string& utterance,
const std::string& lang,
const UtteranceContinuousParameters& params);
virtual bool StopSpeaking();
virtual bool IsSpeaking();
virtual bool SendsEvent(TtsEventType event_type);
// Get the single instance of this class.
static TtsPlatformImplWin* GetInstance();
static void __stdcall SpeechEventCallback(WPARAM w_param, LPARAM l_param);
private:
TtsPlatformImplWin();
virtual ~TtsPlatformImplWin() {}
void OnSpeechEvent();
base::win::ScopedComPtr<ISpVoice> speech_synthesizer_;
// These apply to the current utterance only.
std::wstring utterance_;
int utterance_id_;
int prefix_len_;
ULONG stream_number_;
int char_position_;
friend struct DefaultSingletonTraits<TtsPlatformImplWin>;
DISALLOW_COPY_AND_ASSIGN(TtsPlatformImplWin);
};
// static
TtsPlatformImpl* TtsPlatformImpl::GetInstance() {
return TtsPlatformImplWin::GetInstance();
}
bool TtsPlatformImplWin::Speak(
int utterance_id,
const std::string& src_utterance,
const std::string& lang,
const UtteranceContinuousParameters& params) {
std::wstring prefix;
std::wstring suffix;
if (!speech_synthesizer_.get())
return false;
// TODO(dmazzoni): support languages other than the default: crbug.com/88059
if (params.rate >= 0.0) {
// Map our multiplicative range of 0.1x to 10.0x onto Microsoft's
// linear range of -10 to 10:
// 0.1 -> -10
// 1.0 -> 0
// 10.0 -> 10
speech_synthesizer_->SetRate(static_cast<int32>(10 * log10(params.rate)));
}
if (params.pitch >= 0.0) {
// The TTS api allows a range of -10 to 10 for speech pitch.
// TODO(dtseng): cleanup if we ever use any other properties that
// require xml.
std::wstring pitch_value =
base::IntToString16(static_cast<int>(params.pitch * 10 - 10));
prefix = L"<pitch absmiddle=\"" + pitch_value + L"\">";
suffix = L"</pitch>";
}
if (params.volume >= 0.0) {
// The TTS api allows a range of 0 to 100 for speech volume.
speech_synthesizer_->SetVolume(static_cast<uint16>(params.volume * 100));
}
// TODO(dmazzoni): convert SSML to SAPI xml. http://crbug.com/88072
utterance_ = base::UTF8ToWide(src_utterance);
utterance_id_ = utterance_id;
char_position_ = 0;
std::wstring merged_utterance = prefix + utterance_ + suffix;
prefix_len_ = prefix.size();
HRESULT result = speech_synthesizer_->Speak(
merged_utterance.c_str(),
SPF_ASYNC,
&stream_number_);
return (result == S_OK);
}
bool TtsPlatformImplWin::StopSpeaking() {
if (speech_synthesizer_.get()) {
// Clear the stream number so that any further events relating to this
// utterance are ignored.
stream_number_ = 0;
if (IsSpeaking()) {
// Stop speech by speaking the empty string with the purge flag.
speech_synthesizer_->Speak(L"", SPF_ASYNC | SPF_PURGEBEFORESPEAK, NULL);
}
}
return true;
}
bool TtsPlatformImplWin::IsSpeaking() {
if (speech_synthesizer_.get()) {
SPVOICESTATUS status;
HRESULT result = speech_synthesizer_->GetStatus(&status, NULL);
if (result == S_OK) {
if (status.dwRunningState == 0 || // 0 == waiting to speak
status.dwRunningState == SPRS_IS_SPEAKING) {
return true;
}
}
}
return false;
}
bool TtsPlatformImplWin::SendsEvent(TtsEventType event_type) {
return (event_type == TTS_EVENT_START ||
event_type == TTS_EVENT_END ||
event_type == TTS_EVENT_MARKER ||
event_type == TTS_EVENT_WORD ||
event_type == TTS_EVENT_SENTENCE);
}
void TtsPlatformImplWin::OnSpeechEvent() {
TtsController* controller = TtsController::GetInstance();
SPEVENT event;
while (S_OK == speech_synthesizer_->GetEvents(1, &event, NULL)) {
if (event.ulStreamNum != stream_number_)
continue;
switch (event.eEventId) {
case SPEI_START_INPUT_STREAM:
controller->OnTtsEvent(
utterance_id_, TTS_EVENT_START, 0, std::string());
break;
case SPEI_END_INPUT_STREAM:
char_position_ = utterance_.size();
controller->OnTtsEvent(
utterance_id_, TTS_EVENT_END, char_position_, std::string());
break;
case SPEI_TTS_BOOKMARK:
controller->OnTtsEvent(
utterance_id_, TTS_EVENT_MARKER, char_position_, std::string());
break;
case SPEI_WORD_BOUNDARY:
char_position_ = static_cast<ULONG>(event.lParam) - prefix_len_;
controller->OnTtsEvent(
utterance_id_, TTS_EVENT_WORD, char_position_,
std::string());
break;
case SPEI_SENTENCE_BOUNDARY:
char_position_ = static_cast<ULONG>(event.lParam) - prefix_len_;
controller->OnTtsEvent(
utterance_id_, TTS_EVENT_SENTENCE, char_position_,
std::string());
break;
}
}
}
TtsPlatformImplWin::TtsPlatformImplWin()
: utterance_id_(0),
prefix_len_(0),
stream_number_(0),
char_position_(0) {
speech_synthesizer_.CreateInstance(CLSID_SpVoice);
if (speech_synthesizer_.get()) {
ULONGLONG event_mask =
SPFEI(SPEI_START_INPUT_STREAM) |
SPFEI(SPEI_TTS_BOOKMARK) |
SPFEI(SPEI_WORD_BOUNDARY) |
SPFEI(SPEI_SENTENCE_BOUNDARY) |
SPFEI(SPEI_END_INPUT_STREAM);
speech_synthesizer_->SetInterest(event_mask, event_mask);
speech_synthesizer_->SetNotifyCallbackFunction(
TtsPlatformImplWin::SpeechEventCallback, 0, 0);
}
}
// static
TtsPlatformImplWin* TtsPlatformImplWin::GetInstance() {
return Singleton<TtsPlatformImplWin,
LeakySingletonTraits<TtsPlatformImplWin> >::get();
}
// static
void TtsPlatformImplWin::SpeechEventCallback(
WPARAM w_param, LPARAM l_param) {
GetInstance()->OnSpeechEvent();
}
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