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https://github.com/id-Software/wolf3d-browser.git
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Wolfenstein 3D browser version
This is the code for the browser version of Wolfenstein 3D which is playable on http://www.wolfenstein.com/game_NA.php
This commit is contained in:
Brian Harris
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js/sound.js
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208
js/sound.js
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/*
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* ===========================================================================
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*
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* Wolf3D Browser Version GPL Source Code
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* Copyright (C) 2012 id Software LLC, a ZeniMax Media company.
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*
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* This file is part of the Wolf3D Browser Version GPL Source Code ("Wolf3D Browser Source Code").
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*
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* Wolf3D Browser Source Code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* Wolf3D Browser Source Code is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License version 2
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* along with Wolf3D Browser Source Code. If not, see <http://www.gnu.org/licenses/>.
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*
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* If you have questions concerning this license, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.
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*
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* ===========================================================================
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*/
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Wolf.Sound = (function() {
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Wolf.setConsts({
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// Sound channels
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// Channel 0 never willingly overrides
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// Other channels (1-7) always override a playing sound on that channel
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CHAN_AUTO : 0,
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CHAN_WEAPON : 1,
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CHAN_VOICE : 2,
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CHAN_ITEM : 3,
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CHAN_BODY : 4,
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// Modifier flags
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CHAN_NO_PHS_ADD : 8, // Send to all clients, not just ones in PHS (ATTN 0 will also do this)
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CHAN_RELIABLE : 16, // Send by reliable message, not datagram
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// Sound attenuation values
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ATTN_NONE : 0, // Full volume the entire level
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ATTN_NORM : 1,
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ATTN_IDLE : 2,
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ATTN_STATIC : 3, // Diminish very rapidly with distance
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MAX_PLAYSOUNDS : 128,
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MAX_CHANNELS : 64,
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MUSIC_VOLUME : 0.8,
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MASTER_VOLUME : 0.6
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});
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var sounds = {},
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audioElements = [],
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currentMusic,
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soundEnabled = true,
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musicEnabled = true,
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music,
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ext,
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exts = ["ogg", "mp3"];
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function getFileName(file) {
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if (!ext) {
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// look for a probably
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for (var i=0;i<exts.length;i++) {
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if (Modernizr.audio[exts[i]] == "probably") {
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ext = exts[i];
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break;
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}
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}
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// look for a maybe
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if (!ext) {
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for (var i=0;i<exts.length;i++) {
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if (Modernizr.audio[exts[i]] == "maybe") {
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ext = exts[i];
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break;
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}
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}
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}
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}
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return file.split(".")[0] + "." + ext
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}
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function createAudioElement() {
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var audio = new Audio();
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audioElements.push(audio);
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return audio;
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}
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function startSound(posPlayer, posSound, entNum, entChannel, file, volume, attenuation, timeOfs) {
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var audio, dx, dy, dist;
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if (!sounds[file]) {
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sounds[file] = [];
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}
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for (var i=0;i<sounds[file].length;i++) {
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if (sounds[file][i].ended || sounds[file][i].paused) {
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audio = sounds[file][i];
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break;
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}
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}
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if (!audio) {
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audio = createAudioElement();
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audio.src = getFileName(file);
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sounds[file].push(audio);
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}
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if (posPlayer && posSound) {
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dx = (posPlayer.x - posSound.x) / Wolf.TILEGLOBAL;
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dy = (posPlayer.y - posSound.y) / Wolf.TILEGLOBAL;
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dist = dx * dx + dy * dy;
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volume *= 1 / (1 + dist / 50);
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}
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audio.volume = volume * Wolf.MASTER_VOLUME * (soundEnabled ? 1 : 0);
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audio.play();
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}
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function startMusic(file) {
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if (!music) {
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music = createAudioElement();
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music.loop = true;
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}
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var filename = getFileName(file);
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if (currentMusic != filename) {
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music.src = currentMusic = filename;
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music.volume = Wolf.MUSIC_VOLUME * Wolf.MASTER_VOLUME * (musicEnabled ? 1 : 0);
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music.play();
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}
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}
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function stopAllSounds() {
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for (var i=0;i<audioElements.length;i++) {
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if (audioElements[i].currentTime > 0) {
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audioElements[i].currentTime = 0;
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audioElements[i].pause();
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}
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}
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}
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function init() {
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}
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function isMusicEnabled() {
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return musicEnabled
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}
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function isSoundEnabled() {
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return soundEnabled;
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}
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function toggleMusic(enable) {
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if (typeof enable != "undefined") {
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musicEnabled = enable;
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} else {
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musicEnabled = !musicEnabled;
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}
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if (music) {
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music.volume = Wolf.MUSIC_VOLUME * Wolf.MASTER_VOLUME * (musicEnabled ? 1 : 0);
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}
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}
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function pauseMusic(enable) {
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if (music) {
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if (enable) {
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music.pause();
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} else if (music.paused) {
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music.play();
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}
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}
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}
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function toggleSound(enable) {
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if (typeof enable != "undefined") {
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soundEnabled = enable;
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} else {
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soundEnabled = !soundEnabled;
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}
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}
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if (Modernizr.audio) {
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return {
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startSound : startSound,
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startMusic : startMusic,
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stopAllSounds : stopAllSounds,
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isMusicEnabled : isMusicEnabled,
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isSoundEnabled : isSoundEnabled,
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toggleMusic : toggleMusic,
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toggleSound : toggleSound,
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pauseMusic : pauseMusic,
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init : init
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}
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} else {
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return {
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startSound : Wolf.noop,
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startMusic : Wolf.noop,
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stopAllSounds : Wolf.noop,
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isMusicEnabled : Wolf.noop,
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isSoundEnabled : Wolf.noop,
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toggleMusic : Wolf.noop,
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toggleSound : Wolf.noop,
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pauseMusic : Wolf.noop,
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init : Wolf.noop
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}
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}
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})();
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