106 lines
2.8 KiB
JavaScript
Executable File
106 lines
2.8 KiB
JavaScript
Executable File
/*
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DESCRIPTION : Audio functions (eg "pick a random sound from a list", "build a playlist") go here.
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NOTES :
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*/
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// ====================================================================
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// Quick run-down of the basic audio commands:
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// Save the specified audio file to handle "s".
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// s = new Sound( "audio/music/menu_track.ogg" );
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// Play the sound stored at handle "s" one time (it'll be automatically freed when the playback ends):
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// s.play();
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// Play the sound stored at handle "s" continuously:
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// s.loop();
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// Close "s" and free it from memory (use in conjunction with loop()):
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// s.free();
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// Adjust the gain (volume) of a sound (floating point range between 0 (silent) and 1 (max volume)).
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// s.setGain(value);
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// ====================================================================
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function newRandomSound(soundType, soundSubType, soundPrePath)
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{
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// Return a random audio file by category, to be assigned to a handle.
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switch (soundType)
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{
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case "music":
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randomSoundPath = "audio/music/"
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break;
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case "voice":
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randomSoundPath = soundPrePath + "/";
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break;
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default:
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break;
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}
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// Get names of sounds (attack, command, select, hit, pain).
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// or
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// Get names of "peace", "menu" (theme) and "battle" tracks.
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soundArray = buildFileList(randomSoundPath, "*" + soundSubType + "*", false);
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if (soundArray.length == 0)
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{
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console.write ("Failed to find sounds matching '*"+soundSubType+"*'");
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return;
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}
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// Get a random number within the sound's range.
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randomSound = getRandom (0, soundArray.length-1);
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// Set name of track.
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randomFileName = soundArray[randomSound];
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// Build path to random audio file.
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randomSoundPath = randomFileName;
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console.write("Playing " + randomSoundPath + " ...");
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return new Sound(randomSoundPath);
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}
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// ====================================================================
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function fadeOut (soundHandle, fadeDuration)
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{
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// Adjust the gain of a sound until it is zero.
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// The sound is automatically freed when finished fading.
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soundHandle.fade(-1, 0, fadeDuration)
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return true;
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}
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// ====================================================================
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function fadeIn (soundHandle, finalGain, fadeDuration)
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{
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// Adjust the gain of a sound from zero up to the given value.
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soundHandle.fade(0, finalGain, fadeDuration)
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return true;
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}
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// ====================================================================
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function crossFade (outHandle, inHandle, fadeDuration)
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{
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// Accepts two sound handles. Over the given duration,
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// fades out the first while fading in the second.
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// Note that it plays the in and frees the out while it's at it.
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if (outHandle)
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fadeOut(outHandle, fadeDuration);
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if (inHandle)
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{
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inHandle.play();
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fadeIn(inHandle, 1, fadeDuration);
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}
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return true;
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}
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// ====================================================================
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