aboutsummaryrefslogtreecommitdiff
path: root/ext/mixed/js/audio.js
diff options
context:
space:
mode:
Diffstat (limited to 'ext/mixed/js/audio.js')
-rw-r--r--ext/mixed/js/audio.js178
1 files changed, 0 insertions, 178 deletions
diff --git a/ext/mixed/js/audio.js b/ext/mixed/js/audio.js
deleted file mode 100644
index b5a025be..00000000
--- a/ext/mixed/js/audio.js
+++ /dev/null
@@ -1,178 +0,0 @@
-/*
- * Copyright (C) 2019-2020 Alex Yatskov <alex@foosoft.net>
- * Author: Alex Yatskov <alex@foosoft.net>
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <https://www.gnu.org/licenses/>.
- */
-
-/*global apiAudioGetUrl*/
-
-class TextToSpeechAudio {
- constructor(text, voice) {
- this.text = text;
- this.voice = voice;
- this._utterance = null;
- this._volume = 1;
- }
-
- get currentTime() {
- return 0;
- }
- set currentTime(value) {
- // NOP
- }
-
- get volume() {
- return this._volume;
- }
- set volume(value) {
- this._volume = value;
- if (this._utterance !== null) {
- this._utterance.volume = value;
- }
- }
-
- play() {
- try {
- if (this._utterance === null) {
- this._utterance = new SpeechSynthesisUtterance(this.text || '');
- this._utterance.lang = 'ja-JP';
- this._utterance.volume = this._volume;
- this._utterance.voice = this.voice;
- }
-
- speechSynthesis.cancel();
- speechSynthesis.speak(this._utterance);
- } catch (e) {
- // NOP
- }
- }
-
- pause() {
- try {
- speechSynthesis.cancel();
- } catch (e) {
- // NOP
- }
- }
-
- static createFromUri(ttsUri) {
- const m = /^tts:[^#?]*\?([^#]*)/.exec(ttsUri);
- if (m === null) { return null; }
-
- const searchParameters = new URLSearchParams(m[1]);
- const text = searchParameters.get('text');
- let voice = searchParameters.get('voice');
- if (text === null || voice === null) { return null; }
-
- voice = audioGetTextToSpeechVoice(voice);
- if (voice === null) { return null; }
-
- return new TextToSpeechAudio(text, voice);
- }
-}
-
-function audioGetFromUrl(url, willDownload) {
- const tts = TextToSpeechAudio.createFromUri(url);
- if (tts !== null) {
- if (willDownload) {
- throw new Error('AnkiConnect does not support downloading text-to-speech audio.');
- }
- return Promise.resolve(tts);
- }
-
- return new Promise((resolve, reject) => {
- const audio = new Audio(url);
- audio.addEventListener('loadeddata', () => {
- if (audio.duration === 5.694694 || audio.duration === 5.720718) {
- // Hardcoded values for invalid audio
- reject(new Error('Could not retrieve audio'));
- } else {
- resolve(audio);
- }
- });
- audio.addEventListener('error', () => reject(audio.error));
- });
-}
-
-async function audioGetFromSources(expression, sources, optionsContext, willDownload, cache=null) {
- const key = `${expression.expression}:${expression.reading}`;
- if (cache !== null) {
- const cacheValue = cache.get(expression);
- if (typeof cacheValue !== 'undefined') {
- return cacheValue;
- }
- }
-
- for (let i = 0, ii = sources.length; i < ii; ++i) {
- const source = sources[i];
- const url = await apiAudioGetUrl(expression, source, optionsContext);
- if (url === null) {
- continue;
- }
-
- try {
- let audio = await audioGetFromUrl(url, willDownload);
- if (willDownload) {
- // AnkiConnect handles downloading URLs into cards
- audio = null;
- }
- const result = {audio, url, source};
- if (cache !== null) {
- cache.set(key, result);
- }
- return result;
- } catch (e) {
- // NOP
- }
- }
- return {audio: null, url: null, source: null};
-}
-
-function audioGetTextToSpeechVoice(voiceURI) {
- try {
- for (const voice of speechSynthesis.getVoices()) {
- if (voice.voiceURI === voiceURI) {
- return voice;
- }
- }
- } catch (e) {
- // NOP
- }
- return null;
-}
-
-function audioPrepareTextToSpeech(options) {
- if (
- audioPrepareTextToSpeech.state ||
- !options.audio.textToSpeechVoice ||
- !(
- options.audio.sources.includes('text-to-speech') ||
- options.audio.sources.includes('text-to-speech-reading')
- )
- ) {
- // Text-to-speech not in use.
- return;
- }
-
- // Chrome needs this value called once before it will become populated.
- // The first call will return an empty list.
- audioPrepareTextToSpeech.state = true;
- try {
- speechSynthesis.getVoices();
- } catch (e) {
- // NOP
- }
-}
-audioPrepareTextToSpeech.state = false;