Merge pull request #399 from toasted-nutbread/audio-system-refactor

Audio system refactor

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;