mirror of https://github.com/OpenMW/openmw.git
Music jukebox is now handled by Monster!
git-svn-id: https://openmw.svn.sourceforge.net/svnroot/openmw/trunk@64 ea6a568a-9f4f-0410-981a-c910a81bb256pull/7/head
nkorslund
16 years ago
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/*
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OpenMW - The completely unofficial reimplementation of Morrowind
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Copyright (C) 2008 Nicolay Korslund
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Email: < korslund@gmail.com >
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WWW: http://openmw.snaptoad.com/
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This file (jukebox.mn) is part of the OpenMW package.
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OpenMW is distributed as free software: you can redistribute it
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and/or modify it under the terms of the GNU General Public License
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version 3, as published by the Free Software Foundation.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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version 3 along with this program. If not, see
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http://www.gnu.org/licenses/ .
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*/
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/*
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A simple jukebox with a playlist. It can play, stop, pause with
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fade in and fade out, and adjust volume.
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*/
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class Jukebox : Object;
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// Between 0 (off) and 1 (full volume)
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float fadeLevel = 0.0;
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// How much to fade in and out each second
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float fadeInRate = 0.10;
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float fadeOutRate = 0.25;
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// Time between each fade step
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float fadeInterval = 0.2;
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// List of sounds to play
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char[][] playlist;
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// Index of current song
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int index;
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// The music volume, set by the user. Does NOT change to adjust for
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// fading, etc. TODO: This should be stored in a configuration class,
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// not here.
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float musVolume;
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bool isPlaying; // Is a song currently playing?
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// TODO: Make "isPaused" instead, makes more sense
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bool hasSong; // Is a song currently selected (playing or paused)
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// TODO: Move to Object for now
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native int randInt(int a, int b);
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// Native functions to control music
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native setSound(char[] filename);
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native setVolume(float f);
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native playSound();
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native stopSound();
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idle waitUntilFinished();
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// Fade out and then stop the music. TODO: Rename these to resume()
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// etc and use super.resume, when this is possible.
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pause() { state = fadeOut; }
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resume()
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{
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if(!hasSong) next();
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else playSound();
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state = fadeIn;
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}
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// Stop the current song. Calling resume again after this is called
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// will start a new song.
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stop()
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{
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stopSound();
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hasSong = false;
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isPlaying = false;
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fadeLevel = 0.0;
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state = null;
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}
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play()
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{
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if(index >= playlist.length)
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return;
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setSound(playlist[index]);
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playSound();
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isPlaying = true;
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hasSong = true;
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}
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// Play the next song in the playlist
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next()
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{
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if(isPlaying)
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stop();
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// Find the index of the next song, if any
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if(playlist.length == 0) return;
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if(++index >= playlist.length)
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{
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index = 0;
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randomize();
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}
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play();
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}
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// Set the new music volume setting. TODO: This should be read from a
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// config object instead.
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updateVolume(float vol)
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{
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musVolume = vol;
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if(isPlaying)
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setVolume(musVolume*fadeLevel);
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}
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setPlaylist(char[][] lst)
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{
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playlist = lst;
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randomize();
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}
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// Randomize playlist.
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randomize()
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{
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if(playlist.length < 2) return;
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foreach(int i, char[] s; playlist)
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{
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// Index to switch with
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int idx = randInt(i,playlist.length-1);
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// To avoid playing the same song twice in a row, don't set the
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// first song to the previous last.
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if(i == 0 && idx == playlist.length-1)
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idx--;
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if(idx == i) // Skip if swapping with self
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continue;
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playlist[i] = playlist[idx];
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playlist[idx] = s;
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}
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}
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// Fade in
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state fadeIn
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{
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begin:
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setVolume(musVolume*fadeLevel);
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sleep(fadeInterval);
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fadeLevel += fadeInterval*fadeInRate;
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if(fadeLevel >= 1.0)
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{
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fadeLevel = 1.0;
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setVolume(musVolume);
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state = playing;
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}
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goto begin;
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}
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// Fade out
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state fadeOut
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{
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begin:
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sleep(fadeInterval);
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fadeLevel -= fadeInterval*fadeOutRate;
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if(fadeLevel <= 0.0)
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{
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fadeLevel = 0.0;
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stopSound();
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isPlaying = false;
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state = null;
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}
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setVolume(musVolume*fadeLevel);
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goto begin;
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}
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state playing
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{
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begin:
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// Wait for the song to play. Will return imediately if the song has
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// already stopped or if no song is playing
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waitUntilFinished();
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// Start playing the next song
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next();
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goto begin;
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}
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