mirror of
https://github.com/rhasspy/espeak-ng.git
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345 lines
12 KiB
Java
345 lines
12 KiB
Java
/*
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* Copyright (C) 2012-2015 Reece H. Dunn
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* Copyright (C) 2011 Google Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* This file implements the Android Text-to-Speech engine for eSpeak.
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*
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* Android Version: 4.0 (Ice Cream Sandwich)
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* API Version: 14
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*/
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package com.reecedunn.espeak;
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import android.annotation.SuppressLint;
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import android.content.BroadcastReceiver;
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import android.content.Context;
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import android.content.Intent;
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import android.content.IntentFilter;
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import android.media.AudioTrack;
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import android.os.Build;
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import android.os.Bundle;
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import android.preference.PreferenceManager;
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import android.speech.tts.SynthesisCallback;
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import android.speech.tts.SynthesisRequest;
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import android.speech.tts.TextToSpeech;
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import android.speech.tts.TextToSpeechService;
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import android.util.Log;
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import android.util.Pair;
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import com.reecedunn.espeak.SpeechSynthesis.SynthReadyCallback;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.HashSet;
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import java.util.List;
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import java.util.Locale;
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import java.util.Map;
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import java.util.Set;
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/**
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* Implements the eSpeak engine as a {@link TextToSpeechService}.
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*
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* @author msclrhd@gmail.com (Reece H. Dunn)
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* @author alanv@google.com (Alan Viverette)
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*/
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@SuppressLint("NewApi")
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public class TtsService extends TextToSpeechService {
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public static final String ESPEAK_INITIALIZED = "com.reecedunn.espeak.ESPEAK_INITIALIZED";
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private static final String TAG = TtsService.class.getSimpleName();
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private static final boolean DEBUG = false;
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private SpeechSynthesis mEngine;
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private SynthesisCallback mCallback;
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private final Map<String, Voice> mAvailableVoices = new HashMap<String, Voice>();
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protected Voice mMatchingVoice = null;
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private BroadcastReceiver mOnLanguagesDownloaded = null;
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@Override
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public void onCreate() {
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initializeTtsEngine();
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super.onCreate();
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}
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@Override
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public void onDestroy() {
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super.onDestroy();
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if (mOnLanguagesDownloaded != null) {
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unregisterReceiver(mOnLanguagesDownloaded);
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}
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}
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/**
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* Sets up the native eSpeak engine.
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*/
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private void initializeTtsEngine() {
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if (mEngine != null) {
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mEngine.stop();
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mEngine = null;
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}
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mEngine = new SpeechSynthesis(this, mSynthCallback);
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mAvailableVoices.clear();
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for (Voice voice : mEngine.getAvailableVoices()) {
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mAvailableVoices.put(voice.name, voice);
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}
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final Intent intent = new Intent(ESPEAK_INITIALIZED);
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sendBroadcast(intent);
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}
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@Override
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protected String[] onGetLanguage() {
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// This is used to specify the language requested from GetSampleText.
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if (mMatchingVoice == null) {
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return new String[] { "eng", "GBR", "" };
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}
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return new String[] {
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mMatchingVoice.locale.getISO3Language(),
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mMatchingVoice.locale.getISO3Country(),
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mMatchingVoice.locale.getVariant()
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};
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}
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private Pair<Voice, Integer> findVoice(String language, String country, String variant) {
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if (!CheckVoiceData.hasBaseResources(this) || CheckVoiceData.canUpgradeResources(this)) {
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if (mOnLanguagesDownloaded == null) {
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mOnLanguagesDownloaded = new BroadcastReceiver() {
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@Override
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public void onReceive(Context context, Intent intent) {
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initializeTtsEngine();
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}
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};
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final IntentFilter filter = new IntentFilter(DownloadVoiceData.BROADCAST_LANGUAGES_UPDATED);
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registerReceiver(mOnLanguagesDownloaded, filter);
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}
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final Intent intent = new Intent(this, DownloadVoiceData.class);
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intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
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startActivity(intent);
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return new Pair<>(null, TextToSpeech.LANG_MISSING_DATA);
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}
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final Locale query = new Locale(language, country, variant);
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Voice languageVoice = null;
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Voice countryVoice = null;
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synchronized (mAvailableVoices) {
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for (Voice voice : mAvailableVoices.values()) {
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switch (voice.match(query)) {
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case TextToSpeech.LANG_COUNTRY_VAR_AVAILABLE:
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return new Pair<>(voice, TextToSpeech.LANG_COUNTRY_VAR_AVAILABLE);
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case TextToSpeech.LANG_COUNTRY_AVAILABLE:
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countryVoice = voice;
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case TextToSpeech.LANG_AVAILABLE:
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languageVoice = voice;
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break;
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}
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}
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}
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if (languageVoice == null) {
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return new Pair<>(null, TextToSpeech.LANG_NOT_SUPPORTED);
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} else if (countryVoice == null) {
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return new Pair<>(languageVoice, TextToSpeech.LANG_AVAILABLE);
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} else {
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return new Pair<>(countryVoice, TextToSpeech.LANG_COUNTRY_AVAILABLE);
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}
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}
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private Pair<Voice, Integer> getDefaultVoiceFor(String language, String country, String variant) {
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final Pair<Voice, Integer> match = findVoice(language, country, variant);
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switch (match.second) {
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case TextToSpeech.LANG_AVAILABLE:
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if (language.equals("fr") || language.equals("fra")) {
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return new Pair<>(findVoice(language, "FRA", "").first, match.second);
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}
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if (language.equals("pt") || language.equals("por")) {
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return new Pair<>(findVoice(language, "PRT", "").first, match.second);
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}
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return new Pair<>(findVoice(language, "", "").first, match.second);
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case TextToSpeech.LANG_COUNTRY_AVAILABLE:
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if ((language.equals("vi") || language.equals("vie")) && (country.equals("VN") || country.equals("VNM"))) {
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return new Pair<>(findVoice(language, country, "hue").first, match.second);
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}
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return new Pair<>(findVoice(language, country, "").first, match.second);
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default:
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return match;
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}
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}
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@Override
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protected int onIsLanguageAvailable(String language, String country, String variant) {
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return findVoice(language, country, variant).second;
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}
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@Override
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protected int onLoadLanguage(String language, String country, String variant) {
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final Pair<Voice, Integer> match = getDefaultVoiceFor(language, country, variant);
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if (match.first != null) {
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mMatchingVoice = match.first;
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}
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return match.second;
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}
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@Override
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protected Set<String> onGetFeaturesForLanguage(String lang, String country, String variant) {
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return new HashSet<String>();
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}
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@Override
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public String onGetDefaultVoiceNameFor(String language, String country, String variant) {
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final Voice match = getDefaultVoiceFor(language, country, variant).first;
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return (match == null) ? null : match.name;
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}
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@Override
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public List<android.speech.tts.Voice> onGetVoices() {
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List<android.speech.tts.Voice> voices = new ArrayList<android.speech.tts.Voice>();
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for (Voice voice : mAvailableVoices.values()) {
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int quality = android.speech.tts.Voice.QUALITY_NORMAL;
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int latency = android.speech.tts.Voice.LATENCY_VERY_LOW;
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Locale locale = new Locale(voice.locale.getISO3Language(), voice.locale.getISO3Country(), voice.locale.getVariant());
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Set<String> features = onGetFeaturesForLanguage(locale.getLanguage(), locale.getCountry(), locale.getVariant());
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voices.add(new android.speech.tts.Voice(voice.name, voice.locale, quality, latency, false, features));
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}
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return voices;
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}
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@Override
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public int onIsValidVoiceName(String name) {
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Voice voice = mAvailableVoices.get(name);
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return (voice == null) ? TextToSpeech.ERROR : TextToSpeech.SUCCESS;
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}
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@Override
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public int onLoadVoice(String name) {
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Voice voice = mAvailableVoices.get(name);
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if (voice == null) {
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return TextToSpeech.ERROR;
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}
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mMatchingVoice = voice;
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return TextToSpeech.SUCCESS;
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}
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@Override
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protected void onStop() {
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Log.i(TAG, "Received stop request.");
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mEngine.stop();
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}
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@SuppressWarnings("deprecation")
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private String getRequestString(SynthesisRequest request) {
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
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return request.getCharSequenceText().toString();
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} else {
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return request.getText();
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}
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}
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private int selectVoice(SynthesisRequest request) {
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
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final String name = request.getVoiceName();
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if (name != null && !name.isEmpty()) {
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return onLoadVoice(name);
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}
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}
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final int result = onLoadLanguage(request.getLanguage(), request.getCountry(), request.getVariant());
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switch (result) {
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case TextToSpeech.LANG_MISSING_DATA:
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case TextToSpeech.LANG_NOT_SUPPORTED:
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return TextToSpeech.ERROR;
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}
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return TextToSpeech.SUCCESS;
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}
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@Override
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protected synchronized void onSynthesizeText(SynthesisRequest request, SynthesisCallback callback) {
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if (mMatchingVoice == null)
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return;
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String text = getRequestString(request);
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if (text == null)
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return;
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if (DEBUG) {
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Log.i(TAG, "Received synthesis request: {language=\"" + mMatchingVoice.name + "\"}");
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final Bundle params = request.getParams();
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for (String key : params.keySet()) {
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Log.v(TAG,
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"Synthesis request contained param {" + key + ", " + params.get(key) + "}");
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}
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}
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if (text.startsWith("<?xml"))
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{
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// eSpeak does not recognise/skip "<?...?>" preprocessing tags,
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// so need to remove these before passing to synthesize.
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text = text.substring(text.indexOf("?>") + 2).trim();
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}
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mCallback = callback;
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mCallback.start(mEngine.getSampleRate(), mEngine.getAudioFormat(), mEngine.getChannelCount());
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final VoiceSettings settings = new VoiceSettings(PreferenceManager.getDefaultSharedPreferences(this), mEngine);
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mEngine.setVoice(mMatchingVoice, settings.getVoiceVariant());
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mEngine.Rate.setValue(settings.getRate(), request.getSpeechRate());
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mEngine.Pitch.setValue(settings.getPitch(), request.getPitch());
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mEngine.PitchRange.setValue(settings.getPitchRange());
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mEngine.Volume.setValue(settings.getVolume());
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mEngine.Punctuation.setValue(settings.getPunctuationLevel());
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mEngine.setPunctuationCharacters(settings.getPunctuationCharacters());
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mEngine.synthesize(text, text.startsWith("<speak"));
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}
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/**
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* Pipes synthesizer output from native eSpeak to an {@link AudioTrack}.
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*/
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private final SpeechSynthesis.SynthReadyCallback mSynthCallback = new SynthReadyCallback() {
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@Override
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public void onSynthDataReady(byte[] audioData) {
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if ((audioData == null) || (audioData.length == 0)) {
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onSynthDataComplete();
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return;
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}
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final int maxBytesToCopy = mCallback.getMaxBufferSize();
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int offset = 0;
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while (offset < audioData.length) {
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final int bytesToWrite = Math.min(maxBytesToCopy, (audioData.length - offset));
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mCallback.audioAvailable(audioData, offset, bytesToWrite);
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offset += bytesToWrite;
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}
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}
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@Override
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public void onSynthDataComplete() {
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mCallback.done();
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}
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};
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}
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