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Clamp beat durations for play note, play drum and rest

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This commit is contained in:
Eric Rosenbaum 2017-03-17 17:29:23 -04:00
parent 1ba7ad0218
commit f2ac365859
1 changed files with 14 additions and 0 deletions
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14
src/blocks/scratch3_sound.js
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@ -39,6 +39,13 @@ Scratch3SoundBlocks.DEFAULT_SOUND_STATE = {
*/
Scratch3SoundBlocks.MIDI_NOTE_RANGE = {min: 36, max: 96}; // C2 to C7
/**
* The minimum and maximum beat values, for clamping the duration of play note, play drum and rest.
* 100 beats at the default tempo of 60bpm is 100 seconds.
* @type {{min: number, max: number}}
*/
Scratch3SoundBlocks.BEAT_RANGE = {min: 0, max: 100};
/**
* @param {Target} target - collect sound state for this target.
* @returns {SoundState} the mutable sound state associated with that target. This will be created if necessary.
@ -140,6 +147,7 @@ Scratch3SoundBlocks.prototype.playNoteForBeats = function (args, util) {
var note = Cast.toNumber(args.NOTE);
note = MathUtil.clamp(note, Scratch3SoundBlocks.MIDI_NOTE_RANGE.min, Scratch3SoundBlocks.MIDI_NOTE_RANGE.max);
var beats = Cast.toNumber(args.BEATS);
beats = this._clampBeats(beats);
var soundState = this._getSoundState(util.target);
var inst = soundState.currentInstrument;
var vol = soundState.volume;
@ -153,16 +161,22 @@ Scratch3SoundBlocks.prototype.playDrumForBeats = function (args, util) {
if (typeof this.runtime.audioEngine === 'undefined') return;
drum = MathUtil.wrapClamp(drum, 0, this.runtime.audioEngine.numDrums);
var beats = Cast.toNumber(args.BEATS);
beats = this._clampBeats(beats);
if (util.target.audioPlayer === null) return;
return util.target.audioPlayer.playDrumForBeats(drum, beats);
};
Scratch3SoundBlocks.prototype.restForBeats = function (args) {
var beats = Cast.toNumber(args.BEATS);
beats = this._clampBeats(beats);
if (typeof this.runtime.audioEngine === 'undefined') return;
return this.runtime.audioEngine.waitForBeats(beats);
};
Scratch3SoundBlocks.prototype._clampBeats = function (beats) {
return MathUtil.clamp(beats, Scratch3SoundBlocks.BEAT_RANGE.min, Scratch3SoundBlocks.BEAT_RANGE.max);
};
Scratch3SoundBlocks.prototype.setInstrument = function (args, util) {
var soundState = this._getSoundState(util.target);
var instNum = Cast.toNumber(args.INSTRUMENT);