559 lines
17 KiB
JavaScript
559 lines
17 KiB
JavaScript
/*
|
|
--------------------------------------------
|
|
MIDI.Plugin : 0.3.2 : 2013/01/26
|
|
--------------------------------------------
|
|
https://github.com/mudcube/MIDI.js
|
|
--------------------------------------------
|
|
Inspired by javax.sound.midi (albeit a super simple version):
|
|
http://docs.oracle.com/javase/6/docs/api/javax/sound/midi/package-summary.html
|
|
--------------------------------------------
|
|
Technologies:
|
|
MIDI.WebMIDI
|
|
MIDI.WebAudio
|
|
MIDI.Flash
|
|
MIDI.AudioTag
|
|
--------------------------------------------
|
|
Helpers:
|
|
MIDI.GeneralMIDI
|
|
MIDI.channels
|
|
MIDI.keyToNote
|
|
MIDI.noteToKey
|
|
*/
|
|
|
|
if (typeof (MIDI) === "undefined") var MIDI = {};
|
|
|
|
(function() { "use strict";
|
|
|
|
var setPlugin = function(root) {
|
|
MIDI.api = root.api;
|
|
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
|
|
--------------------------------------------
|
|
https://dvcs.w3.org/hg/audio/raw-file/tip/midi/specification.html
|
|
--------------------------------------------
|
|
*/
|
|
|
|
(function () {
|
|
var plugin = null;
|
|
var output = null;
|
|
var channels = [];
|
|
var root = MIDI.WebMIDI = {
|
|
api: "webmidi"
|
|
};
|
|
root.setVolume = function (channel, volume) { // set channel volume
|
|
output.send([0xB0 + channel, 0x07, volume]);
|
|
};
|
|
|
|
root.programChange = function (channel, program) { // change channel instrument
|
|
output.send([0xC0 + channel, program]);
|
|
};
|
|
|
|
root.noteOn = function (channel, note, velocity, delay) {
|
|
output.send([0x90 + channel, note, velocity], delay * 1000);
|
|
};
|
|
|
|
root.noteOff = function (channel, note, delay) {
|
|
output.send([0x80 + channel, note, 0], delay * 1000);
|
|
};
|
|
|
|
root.chordOn = function (channel, chord, velocity, delay) {
|
|
for (var n = 0; n < chord.length; n ++) {
|
|
var note = chord[n];
|
|
output.send([0x90 + channel, note, velocity], delay * 1000);
|
|
}
|
|
};
|
|
|
|
root.chordOff = function (channel, chord, delay) {
|
|
for (var n = 0; n < chord.length; n ++) {
|
|
var note = chord[n];
|
|
output.send([0x80 + channel, note, 0], delay * 1000);
|
|
}
|
|
};
|
|
|
|
root.stopAllNotes = function () {
|
|
for (var channel = 0; channel < 16; channel ++) {
|
|
output.send([0xB0 + channel, 0x7B, 0]);
|
|
}
|
|
};
|
|
|
|
root.getInput = function () {
|
|
return plugin.getInputs();
|
|
};
|
|
|
|
root.getOutputs = function () {
|
|
return plugin.getOutputs();
|
|
};
|
|
|
|
root.connect = function (conf) {
|
|
setPlugin(root);
|
|
navigator.requestMIDIAccess(function (access) {
|
|
plugin = access;
|
|
output = plugin.getOutput(0);
|
|
if (conf.callback) conf.callback();
|
|
}, function (err) { // well at least we tried!
|
|
if (window.webkitAudioContext) { // Chrome
|
|
conf.api = "webaudio";
|
|
} else if (window.Audio) { // Firefox
|
|
conf.api = "audiotag";
|
|
} else { // Internet Explorer
|
|
conf.api = "flash";
|
|
}
|
|
MIDI.loadPlugin(conf);
|
|
});
|
|
};
|
|
})();
|
|
|
|
/*
|
|
--------------------------------------------
|
|
Web Audio API - OGG or MPEG Soundbank
|
|
--------------------------------------------
|
|
https://dvcs.w3.org/hg/audio/raw-file/tip/webaudio/specification.html
|
|
--------------------------------------------
|
|
*/
|
|
|
|
if (window.AudioContext || window.webkitAudioContext) (function () {
|
|
|
|
var AudioContext = window.AudioContext || window.webkitAudioContext;
|
|
var root = MIDI.WebAudio = {
|
|
api: "webaudio"
|
|
};
|
|
var ctx;
|
|
var sources = {};
|
|
var masterVolume = 127;
|
|
var audioBuffers = {};
|
|
var audioLoader = function (instrument, urlList, index, bufferList, callback) {
|
|
var synth = MIDI.GeneralMIDI.byName[instrument];
|
|
var instrumentId = synth.number;
|
|
var url = urlList[index];
|
|
var base64 = MIDI.Soundfont[instrument][url].split(",")[1];
|
|
var buffer = Base64Binary.decodeArrayBuffer(base64);
|
|
ctx.decodeAudioData(buffer, function (buffer) {
|
|
var msg = url;
|
|
while (msg.length < 3) msg += " ";
|
|
if (typeof (MIDI.loader) !== "undefined") {
|
|
MIDI.loader.update(null, synth.instrument + "<br>Processing: " + (index / 87 * 100 >> 0) + "%<br>" + msg);
|
|
}
|
|
buffer.id = url;
|
|
bufferList[index] = buffer;
|
|
//
|
|
if (bufferList.length === urlList.length) {
|
|
while (bufferList.length) {
|
|
buffer = bufferList.pop();
|
|
if (!buffer) continue;
|
|
var nodeId = MIDI.keyToNote[buffer.id];
|
|
audioBuffers[instrumentId + "" + nodeId] = buffer;
|
|
}
|
|
callback(instrument);
|
|
}
|
|
});
|
|
};
|
|
|
|
root.setVolume = function (channel, volume) {
|
|
masterVolume = volume;
|
|
};
|
|
|
|
root.programChange = function (channel, program) {
|
|
MIDI.channels[channel].instrument = program;
|
|
};
|
|
|
|
root.noteOn = function (channel, note, velocity, delay) {
|
|
/// check whether the note exists
|
|
if (!MIDI.channels[channel]) return;
|
|
var instrument = MIDI.channels[channel].instrument;
|
|
if (!audioBuffers[instrument + "" + note]) return;
|
|
/// convert relative delay to absolute delay
|
|
if (delay < ctx.currentTime) delay += ctx.currentTime;
|
|
/// crate audio buffer
|
|
var source = ctx.createBufferSource();
|
|
sources[channel + "" + note] = source;
|
|
source.buffer = audioBuffers[instrument + "" + note];
|
|
source.connect(ctx.destination);
|
|
///
|
|
var gainNode = ctx.createGainNode();
|
|
var value = (velocity / 127) * (masterVolume / 127) * 2 - 1;
|
|
gainNode.connect(ctx.destination);
|
|
gainNode.gain.value = Math.max(-1, value);
|
|
source.connect(gainNode);
|
|
source.noteOn(delay || 0);
|
|
return source;
|
|
};
|
|
|
|
root.noteOff = function (channel, note, delay) {
|
|
delay = delay || 0;
|
|
if (delay < ctx.currentTime) delay += ctx.currentTime;
|
|
var source = sources[channel + "" + note];
|
|
if (!source) return;
|
|
// @Miranet: "the values of 0.2 and 0.3 could ofcourse be used as
|
|
// a 'release' parameter for ADSR like time settings."
|
|
// add { "metadata": { release: 0.3 } } to soundfont files
|
|
source.gain.linearRampToValueAtTime(1, delay);
|
|
source.gain.linearRampToValueAtTime(0, delay + 0.2);
|
|
source.noteOff(delay + 0.3);
|
|
return source;
|
|
};
|
|
|
|
root.chordOn = function (channel, chord, velocity, delay) {
|
|
var ret = {}, note;
|
|
for (var n = 0, length = chord.length; n < length; n++) {
|
|
ret[note = chord[n]] = root.noteOn(channel, note, velocity, delay);
|
|
}
|
|
return ret;
|
|
};
|
|
|
|
root.chordOff = function (channel, chord, delay) {
|
|
var ret = {}, note;
|
|
for (var n = 0, length = chord.length; n < length; n++) {
|
|
ret[note = chord[n]] = root.noteOff(channel, note, delay);
|
|
}
|
|
return ret;
|
|
};
|
|
|
|
root.connect = function (conf) {
|
|
setPlugin(root);
|
|
//
|
|
MIDI.Player.ctx = ctx = new AudioContext();
|
|
///
|
|
var urlList = [];
|
|
var keyToNote = MIDI.keyToNote;
|
|
for (var key in keyToNote) urlList.push(key);
|
|
var bufferList = [];
|
|
var pending = {};
|
|
var oncomplete = function(instrument) {
|
|
delete pending[instrument];
|
|
for (var key in pending) break;
|
|
if (!key) conf.callback();
|
|
};
|
|
for (var instrument in MIDI.Soundfont) {
|
|
pending[instrument] = true;
|
|
for (var i = 0; i < urlList.length; i++) {
|
|
audioLoader(instrument, urlList, i, bufferList, oncomplete);
|
|
}
|
|
}
|
|
};
|
|
})();
|
|
|
|
/*
|
|
--------------------------------------------
|
|
AudioTag <audio> - OGG or MPEG Soundbank
|
|
--------------------------------------------
|
|
http://dev.w3.org/html5/spec/Overview.html#the-audio-element
|
|
--------------------------------------------
|
|
*/
|
|
|
|
if (window.Audio) (function () {
|
|
|
|
var root = MIDI.AudioTag = {
|
|
api: "audiotag"
|
|
};
|
|
var note2id = {};
|
|
var volume = 127; // floating point
|
|
var channel_nid = -1; // current channel
|
|
var channels = []; // the audio channels
|
|
var notes = {}; // the piano keys
|
|
for (var nid = 0; nid < 12; nid++) {
|
|
channels[nid] = new Audio();
|
|
}
|
|
|
|
var playChannel = function (channel, note) {
|
|
if (!MIDI.channels[channel]) return;
|
|
var instrument = MIDI.channels[channel].instrument;
|
|
var id = MIDI.GeneralMIDI.byId[instrument].id;
|
|
var note = notes[note];
|
|
if (!note) return;
|
|
var nid = (channel_nid + 1) % channels.length;
|
|
var time = (new Date()).getTime();
|
|
var audio = channels[nid];
|
|
audio.src = MIDI.Soundfont[id][note.id];
|
|
audio.volume = volume / 127;
|
|
audio.play();
|
|
channel_nid = nid;
|
|
};
|
|
|
|
root.programChange = function (channel, program) {
|
|
MIDI.channels[channel].instrument = program;
|
|
};
|
|
|
|
root.setVolume = function (channel, n) {
|
|
volume = n; //- should be channel specific volume
|
|
};
|
|
|
|
root.noteOn = function (channel, note, velocity, delay) {
|
|
var id = note2id[note];
|
|
if (!notes[id]) return;
|
|
if (delay) {
|
|
return window.setTimeout(function () {
|
|
playChannel(channel, id);
|
|
}, delay * 1000);
|
|
} else {
|
|
playChannel(channel, id);
|
|
}
|
|
};
|
|
|
|
root.noteOff = function (channel, note, delay) {
|
|
setTimeout(function() {
|
|
channels[channel].pause();
|
|
}, delay * 1000)
|
|
};
|
|
|
|
root.chordOn = function (channel, chord, velocity, delay) {
|
|
for (var idx = 0; idx < chord.length; idx ++) {
|
|
var n = chord[idx];
|
|
var id = note2id[n];
|
|
if (!notes[id]) continue;
|
|
if (delay) {
|
|
return window.setTimeout(function () {
|
|
playChannel(channel, id);
|
|
}, delay * 1000);
|
|
} else {
|
|
playChannel(channel, id);
|
|
}
|
|
}
|
|
};
|
|
|
|
root.chordOff = function (channel, chord, delay) {
|
|
for (var idx = 0; idx < chord.length; idx ++) {
|
|
var n = chord[idx];
|
|
var id = note2id[n];
|
|
if (!notes[id]) continue;
|
|
if (delay) {
|
|
return window.setTimeout(function () {
|
|
channels[channel].pause();
|
|
}, delay * 1000);
|
|
} else {
|
|
channels[channel].pause();
|
|
}
|
|
}
|
|
};
|
|
|
|
root.stopAllNotes = function () {
|
|
for (var nid = 0, length = channels.length; nid < length; nid++) {
|
|
channels[nid].pause();
|
|
}
|
|
};
|
|
|
|
root.connect = function (conf) {
|
|
var loading = {};
|
|
for (var key in MIDI.keyToNote) {
|
|
note2id[MIDI.keyToNote[key]] = key;
|
|
notes[key] = {
|
|
id: key
|
|
};
|
|
}
|
|
setPlugin(root);
|
|
///
|
|
if (conf.callback) conf.callback();
|
|
};
|
|
})();
|
|
|
|
/*
|
|
--------------------------------------------
|
|
Flash - MP3 Soundbank
|
|
--------------------------------------------
|
|
http://www.schillmania.com/projects/soundmanager2/
|
|
--------------------------------------------
|
|
*/
|
|
|
|
(function () {
|
|
|
|
var root = MIDI.Flash = {
|
|
api: "flash"
|
|
};
|
|
var noteReverse = {};
|
|
var notes = {};
|
|
|
|
root.programChange = function (channel, program) {
|
|
MIDI.channels[channel].instrument = program;
|
|
};
|
|
|
|
root.setVolume = function (channel, note) {
|
|
|
|
};
|
|
|
|
root.noteOn = function (channel, note, velocity, delay) {
|
|
if (!MIDI.channels[channel]) return;
|
|
var instrument = MIDI.channels[channel].instrument;
|
|
var id = MIDI.GeneralMIDI.byId[instrument].number;
|
|
note = id + "" + noteReverse[note];
|
|
if (!notes[note]) return;
|
|
if (delay) {
|
|
return window.setTimeout(function() {
|
|
notes[note].play({ volume: velocity * 2 });
|
|
}, delay * 1000);
|
|
} else {
|
|
notes[note].play({ volume: velocity * 2 });
|
|
}
|
|
};
|
|
|
|
root.noteOff = function (channel, note, delay) {
|
|
|
|
};
|
|
|
|
root.chordOn = function (channel, chord, velocity, delay) {
|
|
if (!MIDI.channels[channel]) return;
|
|
var instrument = MIDI.channels[channel].instrument;
|
|
var id = MIDI.GeneralMIDI.byId[instrument].number;
|
|
for (var key in chord) {
|
|
var n = chord[key];
|
|
var note = id + "" + noteReverse[n];
|
|
if (notes[note]) {
|
|
notes[note].play({ volume: velocity * 2 });
|
|
}
|
|
}
|
|
};
|
|
|
|
root.chordOff = function (channel, chord, delay) {
|
|
|
|
};
|
|
|
|
root.stopAllNotes = function () {
|
|
|
|
};
|
|
|
|
root.connect = function (conf) {
|
|
soundManager.flashVersion = 9;
|
|
soundManager.useHTML5Audio = true;
|
|
soundManager.url = '../inc/SoundManager2/swf/';
|
|
soundManager.useHighPerformance = true;
|
|
soundManager.wmode = 'transparent';
|
|
soundManager.flashPollingInterval = 1;
|
|
soundManager.debugMode = false;
|
|
soundManager.onload = function () {
|
|
var createBuffer = function(instrument, id, onload) {
|
|
var synth = MIDI.GeneralMIDI.byName[instrument];
|
|
var instrumentId = synth.number;
|
|
notes[instrumentId+""+id] = soundManager.createSound({
|
|
id: id,
|
|
url: MIDI.soundfontUrl + instrument + "-mp3/" + id + ".mp3",
|
|
multiShot: true,
|
|
autoLoad: true,
|
|
onload: onload
|
|
});
|
|
};
|
|
for (var instrument in MIDI.Soundfont) {
|
|
var loaded = [];
|
|
var onload = function () {
|
|
loaded.push(this.sID);
|
|
if (typeof (MIDI.loader) === "undefined") return;
|
|
MIDI.loader.update(null, "Processing: " + this.sID);
|
|
};
|
|
for (var i = 0; i < 88; i++) {
|
|
var id = noteReverse[i + 21];
|
|
createBuffer(instrument, id, onload);
|
|
}
|
|
}
|
|
///
|
|
setPlugin(root);
|
|
//
|
|
var interval = window.setInterval(function () {
|
|
if (loaded.length !== 88) return;
|
|
window.clearInterval(interval);
|
|
if (conf.callback) conf.callback();
|
|
}, 25);
|
|
};
|
|
soundManager.onerror = function () {
|
|
|
|
};
|
|
for (var key in MIDI.keyToNote) {
|
|
noteReverse[MIDI.keyToNote[key]] = key;
|
|
}
|
|
};
|
|
})();
|
|
|
|
/*
|
|
helper functions
|
|
*/
|
|
|
|
// instrument-tracker
|
|
MIDI.GeneralMIDI = (function (arr) {
|
|
var clean = function(v) {
|
|
return v.replace(/[^a-z0-9 ]/gi, "").replace(/[ ]/g, "_").toLowerCase();
|
|
};
|
|
var ret = {
|
|
byName: {},
|
|
byId: {},
|
|
byCategory: {}
|
|
};
|
|
for (var key in arr) {
|
|
var list = arr[key];
|
|
for (var n = 0, length = list.length; n < length; n++) {
|
|
var instrument = list[n];
|
|
if (!instrument) continue;
|
|
var num = parseInt(instrument.substr(0, instrument.indexOf(" ")), 10);
|
|
instrument = instrument.replace(num + " ", "");
|
|
ret.byId[--num] =
|
|
ret.byName[clean(instrument)] =
|
|
ret.byCategory[clean(key)] = {
|
|
id: clean(instrument),
|
|
instrument: instrument,
|
|
number: num,
|
|
category: key
|
|
};
|
|
}
|
|
}
|
|
return ret;
|
|
})({
|
|
'Piano': ['1 Acoustic Grand Piano', '2 Bright Acoustic Piano', '3 Electric Grand Piano', '4 Honky-tonk Piano', '5 Electric Piano 1', '6 Electric Piano 2', '7 Harpsichord', '8 Clavinet'],
|
|
'Chromatic Percussion': ['9 Celesta', '10 Glockenspiel', '11 Music Box', '12 Vibraphone', '13 Marimba', '14 Xylophone', '15 Tubular Bells', '16 Dulcimer'],
|
|
'Organ': ['17 Drawbar Organ', '18 Percussive Organ', '19 Rock Organ', '20 Church Organ', '21 Reed Organ', '22 Accordion', '23 Harmonica', '24 Tango Accordion'],
|
|
'Guitar': ['25 Acoustic Guitar (nylon)', '26 Acoustic Guitar (steel)', '27 Electric Guitar (jazz)', '28 Electric Guitar (clean)', '29 Electric Guitar (muted)', '30 Overdriven Guitar', '31 Distortion Guitar', '32 Guitar Harmonics'],
|
|
'Bass': ['33 Acoustic Bass', '34 Electric Bass (finger)', '35 Electric Bass (pick)', '36 Fretless Bass', '37 Slap Bass 1', '38 Slap Bass 2', '39 Synth Bass 1', '40 Synth Bass 2'],
|
|
'Strings': ['41 Violin', '42 Viola', '43 Cello', '44 Contrabass', '45 Tremolo Strings', '46 Pizzicato Strings', '47 Orchestral Harp', '48 Timpani'],
|
|
'Ensemble': ['49 String Ensemble 1', '50 String Ensemble 2', '51 Synth Strings 1', '52 Synth Strings 2', '53 Choir Aahs', '54 Voice Oohs', '55 Synth Choir', '56 Orchestra Hit'],
|
|
'Brass': ['57 Trumpet', '58 Trombone', '59 Tuba', '60 Muted Trumpet', '61 French Horn', '62 Brass Section', '63 Synth Brass 1', '64 Synth Brass 2'],
|
|
'Reed': ['65 Soprano Sax', '66 Alto Sax', '67 Tenor Sax', '68 Baritone Sax', '69 Oboe', '70 English Horn', '71 Bassoon', '72 Clarinet'],
|
|
'Pipe': ['73 Piccolo', '74 Flute', '75 Recorder', '76 Pan Flute', '77 Blown Bottle', '78 Shakuhachi', '79 Whistle', '80 Ocarina'],
|
|
'Synth Lead': ['81 Lead 1 (square)', '82 Lead 2 (sawtooth)', '83 Lead 3 (calliope)', '84 Lead 4 (chiff)', '85 Lead 5 (charang)', '86 Lead 6 (voice)', '87 Lead 7 (fifths)', '88 Lead 8 (bass + lead)'],
|
|
'Synth Pad': ['89 Pad 1 (new age)', '90 Pad 2 (warm)', '91 Pad 3 (polysynth)', '92 Pad 4 (choir)', '93 Pad 5 (bowed)', '94 Pad 6 (metallic)', '95 Pad 7 (halo)', '96 Pad 8 (sweep)'],
|
|
'Synth Effects': ['97 FX 1 (rain)', '98 FX 2 (soundtrack)', '99 FX 3 (crystal)', '100 FX 4 (atmosphere)', '101 FX 5 (brightness)', '102 FX 6 (goblins)', '103 FX 7 (echoes)', '104 FX 8 (sci-fi)'],
|
|
'Ethnic': ['105 Sitar', '106 Banjo', '107 Shamisen', '108 Koto', '109 Kalimba', '110 Bagpipe', '111 Fiddle', '112 Shanai'],
|
|
'Percussive': ['113 Tinkle Bell', '114 Agogo', '115 Steel Drums', '116 Woodblock', '117 Taiko Drum', '118 Melodic Tom', '119 Synth Drum'],
|
|
'Sound effects': ['120 Reverse Cymbal', '121 Guitar Fret Noise', '122 Breath Noise', '123 Seashore', '124 Bird Tweet', '125 Telephone Ring', '126 Helicopter', '127 Applause', '128 Gunshot']
|
|
});
|
|
|
|
// channel-tracker
|
|
MIDI.channels = (function () { // 0 - 15 channels
|
|
var channels = {};
|
|
for (var n = 0; n < 16; n++) {
|
|
channels[n] = { // default values
|
|
instrument: 0,
|
|
// Acoustic Grand Piano
|
|
mute: false,
|
|
mono: false,
|
|
omni: false,
|
|
solo: false
|
|
};
|
|
}
|
|
return channels;
|
|
})();
|
|
|
|
//
|
|
MIDI.pianoKeyOffset = 21;
|
|
|
|
// note conversions
|
|
MIDI.keyToNote = {}; // C8 == 108
|
|
MIDI.noteToKey = {}; // 108 == C8
|
|
(function () {
|
|
var A0 = 0x15; // first note
|
|
var C8 = 0x6C; // last note
|
|
var number2key = ["C", "Db", "D", "Eb", "E", "F", "Gb", "G", "Ab", "A", "Bb", "B"];
|
|
for (var n = A0; n <= C8; n++) {
|
|
var octave = (n - 12) / 12 >> 0;
|
|
var name = number2key[n % 12] + octave;
|
|
MIDI.keyToNote[name] = n;
|
|
MIDI.noteToKey[n] = name;
|
|
}
|
|
})();
|
|
|
|
})(); |