deac/MIDI.js
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cleanup plugin

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Michael Deal 2013-01-25 22:00:09 -08:00
parent 0cd6f41258
commit fc49758f40
1 changed files with 38 additions and 47 deletions
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85
js/MIDI/Plugin.js
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@ -24,6 +24,19 @@ if (typeof (MIDI) === "undefined") var MIDI = {};
(function() { "use strict"; (function() { "use strict";
var setPlugin = function(root) {
MIDI.technology = root.technology;
MIDI.setVolume = root.setVolume;
MIDI.programChange = root.programChange;
MIDI.noteOn = root.noteOn;
MIDI.noteOff = root.noteOff;
MIDI.chordOn = root.chordOn;
MIDI.chordOff = root.chordOff;
MIDI.stopAllNotes = root.stopAllNotes;
MIDI.getInput = root.getInput;
MIDI.getOutputs = root.getOutputs;
};
/* /*
-------------------------------------------- --------------------------------------------
Web MIDI API - Native Soundbank Web MIDI API - Native Soundbank
@ -36,8 +49,9 @@ if (typeof (MIDI) === "undefined") var MIDI = {};
var plugin = null; var plugin = null;
var output = null; var output = null;
var channels = []; var channels = [];
var root = MIDI.WebMIDI = {}; var root = MIDI.WebMIDI = {
technology: "Web MIDI API"
};
root.setVolume = function (channel, volume) { // set channel volume root.setVolume = function (channel, volume) { // set channel volume
output.send([0xB0 + channel, 0x07, volume]); output.send([0xB0 + channel, 0x07, volume]);
}; };
@ -51,7 +65,7 @@ if (typeof (MIDI) === "undefined") var MIDI = {};
}; };
root.noteOff = function (channel, note, delay) { root.noteOff = function (channel, note, delay) {
output.send([0x80 + channel, note], delay * 1000); output.send([0x80 + channel, note, 0], delay * 1000);
}; };
root.chordOn = function (channel, chord, velocity, delay) { root.chordOn = function (channel, chord, velocity, delay) {
@ -64,7 +78,7 @@ if (typeof (MIDI) === "undefined") var MIDI = {};
root.chordOff = function (channel, chord, delay) { root.chordOff = function (channel, chord, delay) {
for (var n = 0; n < chord.length; n ++) { for (var n = 0; n < chord.length; n ++) {
var note = chord[n]; var note = chord[n];
output.send([0x80, channel, note, velocity], delay * 1000); output.send([0x80 + channel, note, 0], delay * 1000);
} }
}; };
@ -83,17 +97,7 @@ if (typeof (MIDI) === "undefined") var MIDI = {};
}; };
root.connect = function (callback) { root.connect = function (callback) {
MIDI.technology = "Web MIDI API"; setPlugin(root);
MIDI.setVolume = root.setVolume;
MIDI.programChange = root.programChange;
MIDI.noteOn = root.noteOn;
MIDI.noteOff = root.noteOff;
MIDI.chordOn = root.chordOn;
MIDI.chordOff = root.chordOff;
MIDI.stopAllNotes = root.stopAllNotes;
MIDI.getInput = root.getInput;
MIDI.getOutputs = root.getOutputs;
navigator.requestMIDIAccess(function (access) { navigator.requestMIDIAccess(function (access) {
plugin = access; plugin = access;
output = plugin.getOutput(0); output = plugin.getOutput(0);
@ -112,15 +116,15 @@ if (typeof (MIDI) === "undefined") var MIDI = {};
-------------------------------------------- --------------------------------------------
*/ */
if (typeof (MIDI.WebAudioAPI) === "undefined") MIDI.WebAudioAPI = {};
if (window.AudioContext || window.webkitAudioContext) (function () { if (window.AudioContext || window.webkitAudioContext) (function () {
var AudioContext = window.AudioContext || window.webkitAudioContext; var AudioContext = window.AudioContext || window.webkitAudioContext;
var root = MIDI.WebAudioAPI; var root = MIDI.WebAudioAPI = {
technology: "Web Audio API"
};
var ctx; var ctx;
var sources = {}; var sources = {};
var masterVolume = 1; var masterVolume = 127;
var audioBuffers = {}; var audioBuffers = {};
var audioLoader = function (instrument, urlList, index, bufferList, callback) { var audioLoader = function (instrument, urlList, index, bufferList, callback) {
var synth = MIDI.GeneralMIDI.byName[instrument]; var synth = MIDI.GeneralMIDI.byName[instrument];
@ -149,8 +153,8 @@ if (window.AudioContext || window.webkitAudioContext) (function () {
}); });
}; };
root.setVolume = function (n) { root.setVolume = function (channel, volume) {
masterVolume = n; masterVolume = volume;
}; };
root.programChange = function (channel, program) { root.programChange = function (channel, program) {
@ -171,7 +175,7 @@ if (window.AudioContext || window.webkitAudioContext) (function () {
source.connect(ctx.destination); source.connect(ctx.destination);
/// ///
var gainNode = ctx.createGainNode(); var gainNode = ctx.createGainNode();
var value = (velocity / 100) * masterVolume * 2 - 1; var value = (velocity / 127) * (masterVolume / 127) * 2 - 1;
gainNode.connect(ctx.destination); gainNode.connect(ctx.destination);
gainNode.gain.value = Math.max(-1, value); gainNode.gain.value = Math.max(-1, value);
source.connect(gainNode); source.connect(gainNode);
@ -186,6 +190,7 @@ if (window.AudioContext || window.webkitAudioContext) (function () {
if (!source) return; if (!source) return;
// @Miranet: "the values of 0.2 and 0.3 could ofcourse be used as // @Miranet: "the values of 0.2 and 0.3 could ofcourse be used as
// a 'release' parameter for ADSR like time settings." // a 'release' parameter for ADSR like time settings."
// add { "metadata": { release: 0.3 } } to soundfont files
source.gain.linearRampToValueAtTime(1, delay); source.gain.linearRampToValueAtTime(1, delay);
source.gain.linearRampToValueAtTime(0, delay + 0.2); source.gain.linearRampToValueAtTime(0, delay + 0.2);
source.noteOff(delay + 0.3); source.noteOff(delay + 0.3);
@ -209,13 +214,7 @@ if (window.AudioContext || window.webkitAudioContext) (function () {
}; };
root.connect = function (callback) { root.connect = function (callback) {
MIDI.technology = "Web Audio API"; setPlugin(root);
MIDI.setVolume = root.setVolume;
MIDI.programChange = root.programChange;
MIDI.noteOn = root.noteOn;
MIDI.noteOff = root.noteOff;
MIDI.chordOn = root.chordOn;
MIDI.chordOff = root.chordOff;
// //
MIDI.Player.ctx = ctx = new AudioContext(); MIDI.Player.ctx = ctx = new AudioContext();
/// ///
@ -248,7 +247,9 @@ if (window.AudioContext || window.webkitAudioContext) (function () {
if (window.Audio) (function () { if (window.Audio) (function () {
var root = MIDI.AudioTag = {}; var root = MIDI.AudioTag = {
technology: "Audio Tag"
};
var note2id = {}; var note2id = {};
var volume = 1; // floating point var volume = 1; // floating point
var channel_nid = -1; // current channel var channel_nid = -1; // current channel
@ -277,8 +278,8 @@ if (window.Audio) (function () {
MIDI.channels[channel].instrument = program; MIDI.channels[channel].instrument = program;
}; };
root.setVolume = function (n) { root.setVolume = function (channel, n) {
volume = n; volume = n; //- should be channel specific volume
}; };
root.noteOn = function (channel, note, velocity, delay) { root.noteOn = function (channel, note, velocity, delay) {
@ -343,13 +344,7 @@ if (window.Audio) (function () {
id: key id: key
}; };
} }
MIDI.technology = "Audio Tag"; setPlugin(root);
MIDI.setVolume = root.setVolume;
MIDI.programChange = root.programChange;
MIDI.noteOn = root.noteOn;
MIDI.noteOff = root.noteOff;
MIDI.chordOn = root.chordOn;
MIDI.chordOff = root.chordOff;
/// ///
if (callback) callback(); if (callback) callback();
}; };
@ -365,7 +360,9 @@ if (window.Audio) (function () {
(function () { (function () {
var root = MIDI.Flash = {}; var root = MIDI.Flash = {
technology: "Flash"
};
var noteReverse = {}; var noteReverse = {};
var notes = {}; var notes = {};
@ -450,13 +447,7 @@ if (window.Audio) (function () {
} }
} }
/// ///
MIDI.technology = "Flash"; setPlugin(root);
MIDI.setVolume = root.setVolume;
MIDI.programChange = root.programChange;
MIDI.noteOn = root.noteOn;
MIDI.noteOff = root.noteOff;
MIDI.chordOn = root.chordOn;
MIDI.chordOff = root.chordOff;
// //
var interval = window.setInterval(function () { var interval = window.setInterval(function () {
if (loaded.length !== 88) return; if (loaded.length !== 88) return;