1 files changed, 0 insertions, 185 deletions
diff --git a/ext/mixed/js/audio.js b/ext/mixed/js/audio.js
deleted file mode 100644
index 31c476b1..00000000
--- a/ext/mixed/js/audio.js
+++ /dev/null
@@ -1,185 +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/>.
- */
-
-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
-        }
-    }
-}
-
-class AudioSystem {
-    constructor({getAudioUri}) {
-        this._cache = new Map();
-        this._cacheSizeMaximum = 32;
-        this._getAudioUri = getAudioUri;
-
-        if (typeof speechSynthesis !== 'undefined') {
-            // speechSynthesis.getVoices() will not be populated unless some API call is made.
-            speechSynthesis.addEventListener('voiceschanged', this._onVoicesChanged.bind(this));
-        }
-    }
-
-    async getDefinitionAudio(definition, sources, details) {
-        const key = `${definition.expression}:${definition.reading}`;
-        const cacheValue = this._cache.get(definition);
-        if (typeof cacheValue !== 'undefined') {
-            const {audio, uri, source} = cacheValue;
-            return {audio, uri, source};
-        }
-
-        for (const source of sources) {
-            const uri = await this._getAudioUri(definition, source, details);
-            if (uri === null) { continue; }
-
-            try {
-                const audio = await this._createAudio(uri, details);
-                this._cacheCheck();
-                this._cache.set(key, {audio, uri, source});
-                return {audio, uri, source};
-            } catch (e) {
-                // NOP
-            }
-        }
-
-        throw new Error('Could not create audio');
-    }
-
-    createTextToSpeechAudio({text, voiceUri}) {
-        const voice = this._getTextToSpeechVoiceFromVoiceUri(voiceUri);
-        if (voice === null) {
-            throw new Error('Invalid text-to-speech voice');
-        }
-        return new TextToSpeechAudio(text, voice);
-    }
-
-    _onVoicesChanged() {
-        // NOP
-    }
-
-    async _createAudio(uri, details) {
-        const ttsParameters = this._getTextToSpeechParameters(uri);
-        if (ttsParameters !== null) {
-            if (typeof details === 'object' && details !== null) {
-                if (details.tts === false) {
-                    throw new Error('Text-to-speech not permitted');
-                }
-            }
-            return this.createTextToSpeechAudio(ttsParameters);
-        }
-
-        return await this._createAudioFromUrl(uri);
-    }
-
-    _createAudioFromUrl(url) {
-        return new Promise((resolve, reject) => {
-            const audio = new Audio(url);
-            audio.addEventListener('loadeddata', () => {
-                const duration = audio.duration;
-                if (duration === 5.694694 || duration === 5.720718) {
-                    // Hardcoded values for invalid audio
-                    reject(new Error('Could not retrieve audio'));
-                } else {
-                    resolve(audio);
-                }
-            });
-            audio.addEventListener('error', () => reject(audio.error));
-        });
-    }
-
-    _getTextToSpeechVoiceFromVoiceUri(voiceUri) {
-        try {
-            for (const voice of speechSynthesis.getVoices()) {
-                if (voice.voiceURI === voiceUri) {
-                    return voice;
-                }
-            }
-        } catch (e) {
-            // NOP
-        }
-        return null;
-    }
-
-    _getTextToSpeechParameters(uri) {
-        const m = /^tts:[^#?]*\?([^#]*)/.exec(uri);
-        if (m === null) { return null; }
-
-        const searchParameters = new URLSearchParams(m[1]);
-        const text = searchParameters.get('text');
-        const voiceUri = searchParameters.get('voice');
-        return (text !== null && voiceUri !== null ? {text, voiceUri} : null);
-    }
-
-    _cacheCheck() {
-        const removeCount = this._cache.size - this._cacheSizeMaximum;
-        if (removeCount <= 0) { return; }
-
-        const removeKeys = [];
-        for (const key of this._cache.keys()) {
-            removeKeys.push(key);
-            if (removeKeys.length >= removeCount) { break; }
-        }
-
-        for (const key of removeKeys) {
-            this._cache.delete(key);
-        }
-    }
-}