TTS: Add ttsStatus push and pop functions

4 files changed, 50 insertions, 12 deletions

diff --git a/backends/text-to-speech/linux/linux-text-to-speech.cpp b/backends/text-to-speech/linux/linux-text-to-speech.cpp
index 2586b16a2b..02ca5a8ef8 100644
--- a/backends/text-to-speech/linux/linux-text-to-speech.cpp
+++ b/backends/text-to-speech/linux/linux-text-to-speech.cpp
@@ -82,8 +82,9 @@ LinuxTextToSpeechManager::LinuxTextToSpeechManager()
 	_connection->callback_pause = speech_pause_callback;
 	spd_set_notification_on(_connection, SPD_PAUSE);
 
-	setLanguage(Common::String("cs"));
 	updateVoices();
+	_ttsState->_activeVoice = 0;
+	setLanguage(Common::String("en"));
 }
 
 LinuxTextToSpeechManager::~LinuxTextToSpeechManager() {
@@ -134,12 +135,14 @@ bool LinuxTextToSpeechManager::isReady() {
 	return _speechState == READY;
 }
 
-void LinuxTextToSpeechManager::setVoice(Common::TTSVoice *voice) {
+void LinuxTextToSpeechManager::setVoice(unsigned index) {
 	if (_speechState == BROKEN)
 		return;
-	assert(voice != nullptr && voice->getData() != nullptr);
-	spd_set_voice_type(_connection, *(SPDVoiceType *)(voice->getData()));
-	_ttsState->_activeVoice = voice;
+	debug("%d < %d", index, _ttsState->_availaibleVoices.size());
+	assert(index < _ttsState->_availaibleVoices.size());
+	Common::TTSVoice voice = _ttsState->_availaibleVoices[index];
+	spd_set_voice_type(_connection, *(SPDVoiceType *)(voice.getData()));
+	_ttsState->_activeVoice = index;
 }
 
 void LinuxTextToSpeechManager::setRate(int rate) {
@@ -171,8 +174,7 @@ void LinuxTextToSpeechManager::setLanguage(Common::String language) {
 		return;
 	spd_set_language(_connection, language.c_str());
 	_ttsState->_language = language;
-	if (_ttsState->_activeVoice)
-		setVoice(_ttsState->_activeVoice);
+	setVoice(_ttsState->_activeVoice);
 }
 
 void LinuxTextToSpeechManager::updateVoices() {
diff --git a/backends/text-to-speech/linux/linux-text-to-speech.h b/backends/text-to-speech/linux/linux-text-to-speech.h
index bb32979dd7..85f53eb2f8 100644
--- a/backends/text-to-speech/linux/linux-text-to-speech.h
+++ b/backends/text-to-speech/linux/linux-text-to-speech.h
@@ -52,7 +52,7 @@ public:
 	virtual bool isPaused();
 	virtual bool isReady();
 	
-	virtual void setVoice(Common::TTSVoice *voice);
+	virtual void setVoice(unsigned index);
 
 	virtual void setRate(int rate);
 
diff --git a/common/text-to-speech.cpp b/common/text-to-speech.cpp
index 1e2456d8a6..459d4706db 100644
--- a/common/text-to-speech.cpp
+++ b/common/text-to-speech.cpp
@@ -30,7 +30,8 @@ TextToSpeechManager::TextToSpeechManager() {
 	_ttsState->_pitch = 0;
 	_ttsState->_volume = 0;
 	_ttsState->_rate = 0;
-	_ttsState->_activeVoice = nullptr;
+	_ttsState->_activeVoice = 0;
+	_ttsState->_language = "en";
 	_ttsState->_next = nullptr;
 }
 
@@ -46,5 +47,37 @@ TextToSpeechManager::~TextToSpeechManager() {
 	}
 }
 
+void TextToSpeechManager::pushState() {
+	TTSState *newState = new TTSState;
+	newState->_pitch = _ttsState->_pitch;
+	newState->_volume = _ttsState->_volume;
+	newState->_rate = _ttsState->_rate;
+	newState->_activeVoice = _ttsState->_activeVoice;
+	newState->_language = _ttsState->_language;
+	newState->_next = _ttsState;
+	_ttsState = newState;
+	updateVoices();
+}
+
+bool TextToSpeechManager::popState() {
+	if (_ttsState->_next == nullptr)
+		return true;
+
+	for (TTSVoice *i = _ttsState->_availaibleVoices.begin(); i < _ttsState->_availaibleVoices.end(); i++) {
+		free(i->_data);
+	}
+
+	TTSState *oldState = _ttsState;
+	_ttsState = _ttsState->_next;
+
+	delete oldState;
+
+	setLanguage(_ttsState->_language);
+	setPitch(_ttsState->_pitch);
+	setVolume(_ttsState->_volume);
+	setRate(_ttsState->_rate);
+	return false;
+}
+
 }
 #endif
diff --git a/common/text-to-speech.h b/common/text-to-speech.h
index 4bb81118bf..2c9b5c7778 100644
--- a/common/text-to-speech.h
+++ b/common/text-to-speech.h
@@ -63,7 +63,7 @@ struct TTSState {
 	int _pitch;
 	int _volume;
 	String _language;
-	TTSVoice *_activeVoice;
+	int _activeVoice;
 	Array<TTSVoice> _availaibleVoices;
 	TTSState *_next;
 };
@@ -87,8 +87,8 @@ public:
 	virtual bool isPaused() { return false; }
 	virtual bool isReady() { return false; }
 	
-	virtual void setVoice(TTSVoice *voice) {}
-	TTSVoice getVoice() { return *(_ttsState->_activeVoice); }
+	virtual void setVoice(unsigned index) {}
+	TTSVoice getVoice() { return _ttsState->_availaibleVoices[_ttsState->_activeVoice]; }
 
 	virtual void setRate(int rate) {}
 	int getRate() { return _ttsState->_rate; }
@@ -104,6 +104,9 @@ public:
 
 	Array<TTSVoice> getVoicesArray() { return _ttsState->_availaibleVoices; }
 
+	void pushState();
+	bool popState();
+
 protected:
 	TTSState *_ttsState;