/*************************************************************************/
/* tts_linux.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "tts_linux.h"
#include "core/config/project_settings.h"
#include "servers/text_server.h"
TTS_Linux *TTS_Linux::singleton = nullptr;
void TTS_Linux::speech_init_thread_func(void *p_userdata) {
TTS_Linux *tts = (TTS_Linux *)p_userdata;
if (tts) {
MutexLock thread_safe_method(tts->_thread_safe_);
#ifdef DEBUG_ENABLED
int dylibloader_verbose = 1;
#else
int dylibloader_verbose = 0;
#endif
if (initialize_speechd(dylibloader_verbose) == 0) {
CharString class_str;
String config_name = GLOBAL_GET("application/config/name");
if (config_name.length() == 0) {
class_str = "Godot_Engine";
} else {
class_str = config_name.utf8();
}
tts->synth = spd_open(class_str, "Godot_Engine_Speech_API", "Godot_Engine", SPD_MODE_THREADED);
if (tts->synth) {
tts->synth->callback_end = &speech_event_callback;
tts->synth->callback_cancel = &speech_event_callback;
tts->synth->callback_im = &speech_event_index_mark;
spd_set_notification_on(tts->synth, SPD_END);
spd_set_notification_on(tts->synth, SPD_CANCEL);
print_verbose("Text-to-Speech: Speech Dispatcher initialized.");
} else {
print_verbose("Text-to-Speech: Cannot initialize Speech Dispatcher synthesizer!");
}
} else {
print_verbose("Text-to-Speech: Cannot load Speech Dispatcher library!");
}
}
}
void TTS_Linux::speech_event_index_mark(size_t p_msg_id, size_t p_client_id, SPDNotificationType p_type, char *p_index_mark) {
TTS_Linux *tts = TTS_Linux::get_singleton();
if (tts && tts->ids.has(p_msg_id)) {
MutexLock thread_safe_method(tts->_thread_safe_);
// Get word offset from the index mark injected to the text stream.
String mark = String::utf8(p_index_mark);
DisplayServer::get_singleton()->tts_post_utterance_event(DisplayServer::TTS_UTTERANCE_BOUNDARY, tts->ids[p_msg_id], mark.to_int());
}
}
void TTS_Linux::speech_event_callback(size_t p_msg_id, size_t p_client_id, SPDNotificationType p_type) {
TTS_Linux *tts = TTS_Linux::get_singleton();
if (tts) {
MutexLock thread_safe_method(tts->_thread_safe_);
List<DisplayServer::TTSUtterance> &queue = tts->queue;
if (!tts->paused && tts->ids.has(p_msg_id)) {
if (p_type == SPD_EVENT_END) {
DisplayServer::get_singleton()->tts_post_utterance_event(DisplayServer::TTS_UTTERANCE_ENDED, tts->ids[p_msg_id]);
tts->ids.erase(p_msg_id);
tts->last_msg_id = -1;
tts->speaking = false;
} else if (p_type == SPD_EVENT_CANCEL) {
DisplayServer::get_singleton()->tts_post_utterance_event(DisplayServer::TTS_UTTERANCE_CANCELED, tts->ids[p_msg_id]);
tts->ids.erase(p_msg_id);
tts->last_msg_id = -1;
tts->speaking = false;
}
}
if (!tts->speaking && queue.size() > 0) {
DisplayServer::TTSUtterance &message = queue.front()->get();
// Inject index mark after each word.
String text;
String language;
SPDVoice **voices = spd_list_synthesis_voices(tts->synth);
if (voices != nullptr) {
SPDVoice **voices_ptr = voices;
while (*voices_ptr != nullptr) {
if (String::utf8((*voices_ptr)->name) == message.voice) {
language = String::utf8((*voices_ptr)->language);
break;
}
voices_ptr++;
}
free_spd_voices(voices);
}
PackedInt32Array breaks = TS->string_get_word_breaks(message.text, language);
int prev = 0;
for (int i = 0; i < breaks.size(); i++) {
text += message.text.substr(prev, breaks[i] - prev);
text += "<mark name=\"" + String::num_int64(breaks[i], 10) + "\"/>";
prev = breaks[i];
}
text += message.text.substr(prev, -1);
spd_set_synthesis_voice(tts->synth, message.voice.utf8().get_data());
spd_set_volume(tts->synth, message.volume * 2 - 100);
spd_set_voice_pitch(tts->synth, (message.pitch - 1) * 100);
float rate = 0;
if (message.rate > 1.f) {
rate = log10(MIN(message.rate, 2.5f)) / log10(2.5f) * 100;
} else if (message.rate < 1.f) {
rate = log10(MAX(message.rate, 0.5f)) / log10(0.5f) * -100;
}
spd_set_voice_rate(tts->synth, rate);
spd_set_data_mode(tts->synth, SPD_DATA_SSML);
tts->last_msg_id = spd_say(tts->synth, SPD_TEXT, text.utf8().get_data());
tts->ids[tts->last_msg_id] = message.id;
DisplayServer::get_singleton()->tts_post_utterance_event(DisplayServer::TTS_UTTERANCE_STARTED, message.id);
queue.pop_front();
tts->speaking = true;
}
}
}
bool TTS_Linux::is_speaking() const {
return speaking;
}
bool TTS_Linux::is_paused() const {
return paused;
}
Array TTS_Linux::get_voices() const {
_THREAD_SAFE_METHOD_
ERR_FAIL_COND_V(!synth, Array());
Array list;
SPDVoice **voices = spd_list_synthesis_voices(synth);
if (voices != nullptr) {
SPDVoice **voices_ptr = voices;
while (*voices_ptr != nullptr) {
Dictionary voice_d;
voice_d["name"] = String::utf8((*voices_ptr)->name);
voice_d["id"] = String::utf8((*voices_ptr)->name);
voice_d["language"] = String::utf8((*voices_ptr)->language) + "_" + String::utf8((*voices_ptr)->variant);
list.push_back(voice_d);
voices_ptr++;
}
free_spd_voices(voices);
}
return list;
}
void TTS_Linux::speak(const String &p_text, const String &p_voice, int p_volume, float p_pitch, float p_rate, int p_utterance_id, bool p_interrupt) {
_THREAD_SAFE_METHOD_
ERR_FAIL_COND(!synth);
if (p_interrupt) {
stop();
}
if (p_text.is_empty()) {
DisplayServer::get_singleton()->tts_post_utterance_event(DisplayServer::TTS_UTTERANCE_CANCELED, p_utterance_id);
return;
}
DisplayServer::TTSUtterance message;
message.text = p_text;
message.voice = p_voice;
message.volume = CLAMP(p_volume, 0, 100);
message.pitch = CLAMP(p_pitch, 0.f, 2.f);
message.rate = CLAMP(p_rate, 0.1f, 10.f);
message.id = p_utterance_id;
queue.push_back(message);
if (is_paused()) {
resume();
} else {
speech_event_callback(0, 0, SPD_EVENT_BEGIN);
}
}
void TTS_Linux::pause() {
_THREAD_SAFE_METHOD_
ERR_FAIL_COND(!synth);
if (spd_pause(synth) == 0) {
paused = true;
}
}
void TTS_Linux::resume() {
_THREAD_SAFE_METHOD_
ERR_FAIL_COND(!synth);
spd_resume(synth);
paused = false;
}
void TTS_Linux::stop() {
_THREAD_SAFE_METHOD_
ERR_FAIL_COND(!synth);
for (DisplayServer::TTSUtterance &message : queue) {
DisplayServer::get_singleton()->tts_post_utterance_event(DisplayServer::TTS_UTTERANCE_CANCELED, message.id);
}
if ((last_msg_id != -1) && ids.has(last_msg_id)) {
DisplayServer::get_singleton()->tts_post_utterance_event(DisplayServer::TTS_UTTERANCE_CANCELED, ids[last_msg_id]);
}
queue.clear();
ids.clear();
last_msg_id = -1;
spd_cancel(synth);
spd_resume(synth);
speaking = false;
paused = false;
}
TTS_Linux *TTS_Linux::get_singleton() {
return singleton;
}
TTS_Linux::TTS_Linux() {
singleton = this;
// Speech Dispatcher init can be slow, it might wait for helper process to start on background, so run it in the thread.
init_thread.start(speech_init_thread_func, this);
}
TTS_Linux::~TTS_Linux() {
init_thread.wait_to_finish();
if (synth) {
spd_close(synth);
}
singleton = nullptr;
}