1 files changed, 0 insertions, 94 deletions
diff --git a/ext/mixed/js/audio-system.js b/ext/mixed/js/audio-system.js
deleted file mode 100644
index cf63511f..00000000
--- a/ext/mixed/js/audio-system.js
+++ /dev/null
@@ -1,94 +0,0 @@
-/*
- * Copyright (C) 2019-2021  Yomichan Authors
- *
- * 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
- * TextToSpeechAudio
- */
-
-class AudioSystem {
-    constructor() {
-        this._fallbackAudio = null;
-    }
-
-    prepare() {
-        // speechSynthesis.getVoices() will not be populated unless some API call is made.
-        if (typeof speechSynthesis === 'undefined') { return; }
-
-        const eventListeners = new EventListenerCollection();
-        const onVoicesChanged = () => { eventListeners.removeAllEventListeners(); };
-        eventListeners.addEventListener(speechSynthesis, 'voiceschanged', onVoicesChanged, false);
-    }
-
-    getFallbackAudio() {
-        if (this._fallbackAudio === null) {
-            this._fallbackAudio = new Audio('/data/audio/button.mp3');
-        }
-        return this._fallbackAudio;
-    }
-
-    createAudio(url, source) {
-        return new Promise((resolve, reject) => {
-            const audio = new Audio(url);
-            audio.addEventListener('loadeddata', () => {
-                if (!this._isAudioValid(audio, source)) {
-                    reject(new Error('Could not retrieve audio'));
-                } else {
-                    resolve(audio);
-                }
-            });
-            audio.addEventListener('error', () => reject(audio.error));
-        });
-    }
-
-    createTextToSpeechAudio(text, voiceUri) {
-        const voice = this._getTextToSpeechVoiceFromVoiceUri(voiceUri);
-        if (voice === null) {
-            throw new Error('Invalid text-to-speech voice');
-        }
-        return new TextToSpeechAudio(text, voice);
-    }
-
-    // Private
-
-    _isAudioValid(audio, source) {
-        switch (source) {
-            case 'jpod101':
-            {
-                const duration = audio.duration;
-                return (
-                    duration !== 5.694694 && // Invalid audio (Chrome)
-                    duration !== 5.720718 // Invalid audio (Firefox)
-                );
-            }
-            default:
-                return true;
-        }
-    }
-
-    _getTextToSpeechVoiceFromVoiceUri(voiceUri) {
-        try {
-            for (const voice of speechSynthesis.getVoices()) {
-                if (voice.voiceURI === voiceUri) {
-                    return voice;
-                }
-            }
-        } catch (e) {
-            // NOP
-        }
-        return null;
-    }
-}